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Utilization of rice straw for parallel production of sugars rich extract and paper Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-03-07 Ashish Sharma, Vikas Rana, Praveen K. Gupta, Neetu Pandey
Complete utilization of different agricultural wastes is a great challenge before human society. The present study reports the valorization of rice straw for simultaneous production of reducing sugars and paper. The rice straw was first pre-extracted with water under different reaction conditions sequentially followed by papermaking. A maximum total reducing sugars (TRS) upto 12.38 % was extracted
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Drying characteristics and thin layer drying model of semi-mature rice paper Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-02-27 Weichao Wang, Yan Yan, Zhao Pan
The effects of different hot air speeds and temperatures on the drying characteristics of half-ripe rice paper were investigated by hot air convection drying experiments. The thin-layer drying experiments were carried out at three different combinations of air speeds of 1.97 m/s, 3.00 m/s, and 3.90 m/s and temperatures of 85 °C, 100 °C and 115 °C. The results show that among the 10 drying kinetic models
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Effect of in-situ mineralization of calcium carbonate on the aging resistance of Wikstroemia bast fiber Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-02-26 Jian Wang, Yubo Wang, Xinyi Shao, Yuxuan Lin, Wenbao Song, Dehua Xu, Yifei Gao
Paper cultural relics, as the carriers of human civilization, inevitably deteriorate during the long-term storage. The restoration of those damaged or aged paper cultural relics is an important part of cultural relics protection. How to obtain the fiber with high permanence property is the key to the repair paper used to cultural relic restoration. Herein, in order to obtain high permanence lignocellulosic
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Nanofibrillated pulps from Amazonian species as a potential raw material for ecological packaging Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-02-16 Danillo Wisky Silva, Felipe Gomes Batista, Mário Vanoli Scatolino, Adriano Reis Prazeres Mascarenhas, Dayane Targino de Medeiros, Gustavo Henrique Denzin Tonoli, Lourival Marin Mendes, Tiago Marcolino de Souza, Francisco Tarcísio Alves Junior
Using cellulosic micro/nanofibrils (MFC/NFC) in developing films for coatings and packaging has aroused industrial interest to replace plastic. This study proposes functionalizing packaging films composed of hybrid suspensions of 80 % titica vine (Heteropsis flexuosa) and 20 % Pinus to improve their mechanical properties. The MFC/NFC were produced by mechanical fibrillation and adding proportions of
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Research on the brightening effect of miscible wetting additives on fly ash coatings Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-02-14 Zehao Wang, Jingkun Yang, Hangtian Gao, Jianan Liu, Fengyu Li, Deli Zeng, Hongyan Mou, Huiming Fan
The resource utilization of fly ash has always been a popular topic in the field of solid waste recycling. This paper is based on the three-phase reaction system of “fly ash (s)-[Ca(OH)2–H2O/ethanol] (l)-CO2 (g)”, using the bubble carbonization method to carry out heterogeneous phase reaction with fly ash as the core crystallized to form a fly ash-based calcium carbonate composite with higher brightness
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Preparation and characterization of nanocellulose acetate and acrylate polymer composite membrane Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-02-12 Jiale Wang, Xianglin Qiu, Xukang Lang, Shanshan Gao, Xiaoming Song, Fushan Chen
In the present study, a nanocellulose acetate and acrylate polymer composite membrane was formed by the phase transfer technique. The physical and mechanical properties, water flux, and desalination performance of the achieved composite membrane were investigated. When 3 % (w/w) acrylate polymer, 10 % acetylated nanocellulose, and 0.3 % mass fraction of TiO2 were used for the formation of the membrane
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Penetration and spreading of graphene oxide ink in rice paper enabling its unique expressiveness in Chinese paintings Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2024-01-05 Ximei Liu, Cheng Teng, Jianlin Li
In Chinese paintings, the marriage of rice paper and ink is the soul of this art. Ink possesses a highly distinctive “color” expressiveness. By employing ink, various shades of black and diverse color effects can be portrayed, making the image more rich, vibrant, and three-dimensional on a rice paper. However, when used in traditional ink wash painting, the flow and penetration of conventional ink
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Printable active packaging film with Pelargonium graveolens oil Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-12-22 Emine Arman Kandirmaz, Arif Ozcan
Due to the increasing demands of consumers from the food packaging, it enabled the improve of active packaging practices. Antimicrobial and antifungal coatings or films are an active packaging application. In such packaging materials, natural or synthetic antimicrobial material is added to the film or coating to help the packaging protect food. The use of biofilms produced from biopolymers in food
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Organic acid fractionation of hardwoods planted in social forestry Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-12-12 Sharmin Islam, Razia Sultana Popy, M. Nur Alam Likhon, M. Mostafizur Rahman, M. Sarwar Jahan
Trema orientalis and Trewia nudiflora are the fastest rotation trees (3–4 years’ rotation) in Bangladesh, and experimentally planted in social forestry in Gazipur district. Biorefinery is the most cited topic in research recent era in order to established circular bioeconomy. In established a biorefinery initiative, both species were fractionated into pulp, lignin and hemicellulose by formic acid (FA)
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Increased recyclability of wet strengthened liquid packaging board, through synergetic effects of combining CMC and PAE – A case study in full scale Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-21 Sara Christenson, Björn Sjöstrand
There is an ever-increasing demand for renewable, recyclable and biodegradable packaging solutions, from consumers, producers of goods, and producers of packaging materials. Closing the material loop and increasing recyclability of fiber-based package materials is one of the keys to move forward towards a more sustainable future. While the recyclability rates of fiber-based packaging are high, packaging
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Effect of fine fibers on secondary fibers and recycled paper Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-17 Ya Zhang, Yuxin Liu, Jizhen Huang, Kai Li, Liangliang An, Jianquan Hu, Wanruo Lei
Recycled paper has become increasingly used as a raw material in the paper industry. However, hornification limits its application. Herein, the effect of recycling on the mechanical properties and microstructure of khasi pine pulp was systematically studied. The mechanical properties deteriorated and water retention value decreased after recycling. X-ray diffraction and Fourier-transform infrared spectroscopy
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Water uptake as a fuel for soft actuators from cellulose Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-17 Lisa Lopes da Costa, Ana Villares
Water plays an important role in the properties of cellulose. In materials design, the water uptake of cellulose has been traditionally seen as a drawback, since water reduces mechanical resistance of paper and cardboard, and at high hydration, cellulose-based products are disintegrated. However, recently, the hydration of cellulose has been considered as an advantage to design water-responsive soft
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The preparation of cellulose acetate capsules using emulsification techniques: high-shear bulk mixing and microfluidics Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-13 Katarzyna Mystek, Bo Andreasson, Michael S. Reid, Hugo Françon, Cecilia Fager, Per A. Larsson, Anna J. Svagan, Lars Wågberg
This work describes an emulsification-solvent-evaporation method for the preparation of liquid-filled capsules made from cellulose acetate. Two different emulsification techniques were applied: bulk emulsification by high-shear mixing, and droplet generation using microfluidics. The bulk emulsification method resulted in the formation of oil-in-water emulsions composed of an organic mixture of isooctane
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The effect of carbon nanoparticles on cellulosic handsheets Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-08 Merve Engin, Nusret Kaya
This article describes the study of the effects of carbon nanoparticles on fibrous cellulosic webs. The handsheets were coated with coating colours containing graphene oxide (GO), carbon nanotube (CNT) and super conductive black carbon (SCBC) nanoparticles at different concentrations. The Raman method was used to assess the quality of the carbon materials and the changes in the band gap of the nanoparticles
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Nanofibers/reduced graphene oxide/polypyrrole for High-performance electrode material Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-07 Yunhao Luan, Lingyun Jia, Wenli Liu, Pengtao Liu
This paper prepared the composite aerogel by adding graphene oxide (GO) and polypyrrole (PPy) to the cellulose nanofiber suspension. Then GO was reduced to RGO (reduced graphene oxide) with reducing agent, and CNFs/RGO/PPy composite aerogel with excellent conductivity was prepared. Scanning electron microscope (SEM) was adopted to analyze the structure and morphology of CNFs/RGO/PPy aerogel. Cyclic
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Carbon emissions analysis of the pulp molding industry: a comparison of dry-press and wet-press production processes Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-11-03 Zhisheng Lv, Shaohong Jiang, Lingjun Wei, Hao Sun, Yuhui Liu, Jieyu Cui, Wanlu Zhang
An initial carbon emission calculation formula for the pulp molding industry was first proposed in accordance with the calculation guidelines provided by the Intergovernmental Panel on Climate Change (IPCC). The formula was primarily developed by utilizing the greenhouse gas accounting methods used in the pulp and paper industry and the life cycle assessment (LCA) theory. Carbon dioxide emissions coming
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Recyclable oil resistant paper with enhanced water resistance based on alkyl ketene dimer modified sodium alginate Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-10-26 Liyan Ma, Shuai Liu, Jiahui Shi, Rina Wu, Peng Lu
Sustainable coatings exhibit potential in enhancing oil resistance of packaging paper. Alkyl ketone dimer (AKD) was used to esterify sodium alginate (SA) to prepare water and oil resistant agent SAD. As SAD was coated on paper, it reduced the surface energy and blocked the fiber pores of paper, thus improving the barrier performance of paper. The oil resistance grade can reach grade 6 at coating amount
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Preparation and properties of a novel decorative base paper for formaldehyde-free adhesive impregnation Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-10-17 Min Liang, Jingya Gong, Jianfeng Xu, Ru Liu, Ling Long
Formaldehyde-free adhesives are gaining attention due to their compatibility with green production methods. Decorative base paper (DBP) is known for its physical strength and printability and has a high ability for absorbing aldehyde-free adhesives for impregnation. In this paper, DBP was prepared with TiO2 and SiO2 combined with polyvinyl alcohol (PVA), where the amount of TiO2 was reduced in the
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Effects of programmed maintenance shutdowns on effluent quality of a bleached kraft pulp mill Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-10-16 Nelson Rubens Nascimento Del’Antonio, Mariele Fioreze, Márcio Caliari, João Pedro Amaral, Claudio Mudadu Silva
Routinely, the mills perform programmed maintenance shutdowns (PMS) that can affect the characteristics of the effluents and the performance of the effluent treatment plant (ETP). A careful planning of the PMS, along with the use of industrial process sectorial spill control and the use of the emergency spill lagoon have considerably minimized these effects. The Suzano pulp mill located in Aracruz
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Preparation of flexible and binder-free lignin-based carbon nanofiber electrode materials by electrospinning in aqueous system Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-09-28 Yunxia Wang, Pengfei Hao, Lirong Lei, Yi Hou
Lignin, as a widely distributed, renewable and environmentally friendly source of carbon, could been utilized for carbon nanofibers to not only maximize the usage of resources, but also expand the energy-related opportunities. In this research, flexible lignin-based carbon nanofibers are prepared by electrospinning lignin nanofibers in a new green aqueous solution of lignin and polyvinyl alcohol (PVA)
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Water-dispersible paper for packaging applications – balancing material strength and dispersibility Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-09-25 Andrea Christine Pfennich, Elisabeth Anna Schoeffmann, Herfried Lammer, Ulrich Hirn
Water-dispersible paper is useful for packaging applications as it disintegrates into its fibers after usage, and also is a fully biodegradable material. Here, we first introduce a laboratory testing method for the disintegration performance of different paper grades under low agitation in water. Then a quantitative analysis on the technological and physical mechanisms responsible for dispersibility
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Using guaiacol as a capping agent in the hydrothermal depolymerisation of kraft lignin Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-09-25 Anders Ahlbom, Marco Maschietti, Rudi Nielsen, Merima Hasani, Hans Theliander
The depolymerisation of softwood kraft lignin was investigated, under hydrothermal conditions at 290 °C and 250 bar, with guaiacol in the reactor feed to evaluate its impact on the formation of char and on the molecular weights of the products. The effect of residence time was investigated in the time span 1–12 min. Lignin is depolymerised during the process and guaiacol is both formed and consumed
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Effect of cellulose nanofibril concentration and diameter on the quality of bicomponent yarns Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-09-25 Fernando Alves, Michel De Oliveira Picanço, Jair Rogerio Colares Neto, Tatiana de Fátima Martins Pires, Pedro Ygor Correia, Danillo Wisky Silva, Jordão Cabral Moulin
The industrial sector is increasingly interested in the production of yarns based on renewable, efficient, innovative, and ecological resources. Among these precursors, cellulose nanofibrils (NFC) have gained attention due to their interesting characteristics for the development of new products. However, their dimensions pose challenges in their use. Therefore, this study aimed to analyze the influence
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The influence of creases on carton board package behavior during point loading Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-09-04 Camilla Persson, Henry Eriksson, Christer Korin
Carton board packages with different creases have been manufactured and loaded with point loads to see if there is a difference in point load behavior depending on crease. A carton board was creased in four different ways. The differences of the creases were judged according to appearance and residual moment. Three of the four creases showed divergent appearances. The residual moment was as expected
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Great potentials of lignin-based separator for Li-ion battery with electrospinning in aqueous system Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-09-02 Weipan Zhang, Pengfei Hao, Lirong Lei, Yi Hou
Separator plays a key role in the safety and performances of lithium-ion batteries with the needs of good thermal stability and wettability. Compared with the commercial separator mainly made by polyolefins in organic solvents, the electrospinning of lignin/polyvinyl alcohol in an aqueous solution has been investigated as a green and economically viable method to produce high-performance separators
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Effects of trace elements (Fe, Cu, Ni, Co and Mg) on biomethane production from paper mill wastewater Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-08-31 Dilan Toprak, Tülay Yilmaz, Kerem Gülpinar, Amine Yücel, Yakup Çakmak, Deniz Uçar
Trace elements have a significant effect on biochemical reactions and therefore the presence of optimum levels of trace elements is essential for bioreactor performances. In this study, the effects of five trace elements on biomethane production have been investigated. Experimental studies have been carried out with multiple batch reactors at 15 day HRT and mesophilic temperatures. The optimum concentrations
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Study on properties of paper coated with Stachys floridana Shuttlew.ex Benth hemicellulose – chitosan composite solution Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-08-08 Jie Li, Haitang Liu, Qian Wang, Yefan Wang, Lin Chen, Xin Jin, Zhihua Guo, Ting Wang, Xinyu Zhang
The hemicellulose was extracted from the Stachys floridana Shuttlew.ex Benth by ultrasonic-assisted, fractional alcohol precipitation method, mixed with chitosan solution, and coated on the surface of the paper with three layers, to explore the effect of its morphology, thermal stability, barrier, mechanical properties of coated paper. The results showed that the gas barrier property of the paper coated
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Preparation and application of epoxy cyclohexane/chitosan/methyl methacrylate composite material Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-08-07 Xuxing Li, Xuemei Wang, Jun Gao, Yingping Qi, Hua Li
As a cultural carrier of historical inheritance, paper has high cultural, historical and scientific research value. But with the passage of time and the change of the environment, many paper are aging and damaged. In order to protect the paper, epoxy cyclohexane/chitosan/methyl methacrylate composite material for paper protection was synthesized by radical grafting polymerization with potassium persulfate
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Analyses of the effects of fiber diameter, fiber fibrillation, and fines content on the pore structure and capillary flow using laboratory sheets of regenerated fibers Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-07-18 Christiane Helbrecht, Markus Langhans, Tobias Meckel, Markus Biesalski, Samuel Schabel
The aim of this work is to investigate the influence of fiber fibrillation and fines on the pore structure of well-defined regenerated fiber sheets as well as the water flow through the sheet. For this purpose, sheets were produced with refined, fibrillated fibers only, with unfibrillated fibers and fines, as well as with fibrillated fibers and fines. Next, the samples were analyzed by brightfield
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Caustic and enzymatic effects on dissolving pulp and its performance as specialty fiber Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-07-06 Chen Gong, Shujie Fan, Bin Yang, Yu Zhang, Jianping Ni, Zhenhua Su
The aim of this study was to investigate an effective approach for improving the dissolving pulp properties for making specialty fiber. The caustic and enzymatic treatment of the properties of dissolving pulp was conducted by analyzing the macromolecular structure and chemical composition. The results showed that the enzymatic treatment was more effective on influencing the macromolecular properties
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Effect of cellulose micro/nanofibrils and carboxylated styrene butadiene rubber coating on sack kraft paper Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-07-06 Lisiane Nunes Hugen, Eduardo Hélio de Novais Miranda, Allan de Amorim dos Santos, Rafael Carvalho do Lago, Luiz Eduardo Silva, Gustavo Henrique Denzin Tonoli, Saulo Rocha Ferreira
The main objective of this research is to evaluate the influence of coating based on cellulose micro/nanofibrils (CMF) and carboxylated styrene butadiene rubber (XSBR) on sack kraft paper, for possible use in packaging. Filmogenic solutions were applied manually as a coating on sack kraft paper. These solutions were prepared by suspensions of CMF 1.5 % w/v with the addition of different content of
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Waste newspaper activation using sodium salts: a new perspective Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-07-04 Yeo Shi Hao, Norasikin Othman, Muhammad Abbas Ahmad Zaini
Waste newspaper causes contamination to the environment. Conversion of waste newspaper into activated carbon is a potential strategy due to its high carbon content. This paper aims to summarize recent advances in the production of activated carbons from waste newspaper and their applications in adsorption and wastewater treatment. The physicochemical properties from the use of different chemical activators
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Out-of-plane uniaxial loading of paperboard: experimental procedure and evaluation Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-06-13 Kristofer Robertsson, Jonas Engqvist, Mathias Wallin, Matti Ristinmaa, Johan Tryding, Eric Borgqvist
Development of three-dimensional continuum models for paperboard is an active field and the need for reliable measurements to calibrate and validate such models is evident. An experimental device and protocol for cyclic out-of-plane loading is developed. This loading sequence is present during converting operations of paperboard. The experimental tests reveals that the commonly observed soft initial
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Disintegration of toilet papers used in shopping malls Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-05-25 Gulnur Mertoglu Elmas, Beyza Karabulut, Sultan Bekiroglu Ozturk, Celil Atik, Sinan Sonmez
Paper has been used in the field of hygiene for centuries. Tissue papers have low grammage, creped or non-creped surface, and consisting of one or more layers from virgin papers. Toilet paper, which has an important area of use, comes at the beginning of the tissue papers divided into various product groups. Its use has increased even more with the effect of the coronavirus pandemic. Increasing use
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Interlaminar shear modulus of cardboard obtained by torsional and flexural vibration tests Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-05-15 Hiroshi Yoshihara, Masahiro Yoshinobu, Makoto Maruta
The interlaminar shear modulus of cardboards was measured using torsional vibration (TV) and flexural vibration (FV) methods. In the TV method, the sample widths were decreased during the tests, and the interlaminar and in-plane shear moduli were determined using the data obtained based on the different widths. By contrast, in the FV method, the resonance frequencies from the first to third FV modes
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The influence of fibrous suspension flow regimes on the formation of tissue paper manufactured from different furnish compositions Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-04-19 Afonso H. T. Mendes, Song W. Park
The present work was based on analysis of the flow regime of fibre suspensions, that corresponds to furnishes and process conditions typically established for tissue paper manufacturing, i.e., under the common range of stock consistencies at the machine headbox and most usual furnish compositions. The flocculation potential of fibre suspensions used for toilet papers, facial tissues, paper towels and
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Determination of fines in recycled paper Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-04-11 Gulnur Mertoglu Elmas, Beyza Karabulut
Waste paper, the use of which is increasing day by day as a raw material, has a heterogeneous structure as it contains non-fiber material from different sources. It is desired to have a homogeneous product when recycled. Within the scope of this study, the SEM images of the raw materials determined according to EN 643 standard and the products made with the recycling of these raw materials were examined
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Microbial xylanase aided biobleaching effect on multiple components of lignocelluloses biomass based pulp and paper: a review Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-04-11 Ajinath Dukare, Kanika Sharma, Sheshrao Kautkar, Jyoti Dhakane-Lad, Rahul Yadav, Vigneshwaran Nadanathangam, Sujata Saxena
Due to discharge of hazardous organochlorine compounds and absorbable organic halogen compounds in the effluent, the pulp and paper industries are trying to alter the bleaching process to limit the use of chlorine compounds and comply with regulatory, environmental, and market demands. With progress in biotechnology, enzyme technologies can effectively pre-treat lignocellulosic biomass in the pulp
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Cryoslash as an effective pre-treatment to obtain nanofibrillated cellulose using ultra-fine friction grinder with kraft pulp Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-30 Gabriel G. de Lima, Bruno Aggio, Mailson Matos, Tielidy A. M. de Lima, Bruno L. Pereira, Alessandra Cristina Pedro, Washington L. E. Magalhães
Approaches to obtain nanocellulose have been extensively suggested, and among the most competitive methodologies includes mechanical defibrillation, which results in a nanocellulose gel suspension that can be used in a variety of applications. However, standard procedures results in inhomogeneous fibre sizes due to its physical approach. Pre-treatments have been suggested, such as enzymes, but their
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Possible alternatives for using kraft lignin as activated carbon in pulp mills – a review Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-28 Tatiana Aurora Condezo Castro, Marcelo Cardoso, Ana Augusta Passos Rezende, Angélica de Cássia Oliveira Carneiro, Larissa Quartaroli, Cláudio Mudadu Silva
The uses of kraft lignin (KL), obtained from the black liquor (BL) in the pulping process, allow the production of activated carbon (AC), a product with high added value in the pulp mill. The AC can be used in three different sectors in a cellulose pulp mill: sectorial treatment of the cellulosic pulp bleaching filtrates; wastewater treatment; and in the treatment of water received by the mill. Thus
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Assessment of paperboard large deformation at fold using digital image correlation technique Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-24 Babak Mirzaei, Arthur Thompson Johnson, Joel Panek, George Mwangi
For coated paperboard with large deformations, there is limited knowledge on the mechanisms that lead to coating damage and on the key properties that affect damage. Large deformations produce complex non-linear mechanical responses which often result in significant internal damage. The objective of this work was to establish methods to directly measure local deformation at a fold using a stereo digital
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Pre-treatment with calcium hydroxide and accelerated carbonation for cellulosic pulp fibrillation Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-24 Lorran de Sousa Arantes, Adriano Reis Prazeres Mascarenhas, Mário Vanoli Scatolino, Gustavo Henrique Denzin Tonoli, Lourival Marin Mendes, Ianca Oliveira Borges, José Benedito Guimarães Júnior
In this study, the effect of different concentrations of calcium hydroxide (Ca(OH)2) was evaluated as a pre-treatment for accelerated carbonation and its influence on the fibrillation of cellulosic pulps to obtain nanofibrils, and its application as a coating agent for papers. Eucalyptus (EUC) and Pine (PIN) unbleached cellulosic fibers were submitted to pre-treatment with Ca(OH)2 at concentrations
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Addition of bentonite to cationic starch matrix for coating on kraftliner paper to improve grease resistance Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-17 Allan de Amorim dos Santos, Lays Camila Matos, Maressa Carvalho Mendonça, Marcelo Coelho dos Santos Muguet, Andrea Ponzecchi, Anand Ramesh Sanadi, Gustavo Henrique Denzin Tonoli
In this work, we aimed to analyze suspensions of cationic starch by adding 5 wt%, 7 wt%, and 10 wt% of bentonite as a bilayer coating on kraftliner paper (85 g/m2). The controls were doubly-wet-and-dry and uncoated kraftliner paper. In a coating machine, the formulations were applied until reaching a grammage of 15 g/m2 and then dried at 103 ± 2 °C. The test was carried out about pH, solids content
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Efficient and eco-friendly isolation and purification of lignin from black liquor with choline chloride-based deep eutectic solvents Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-11 Zhuang Liu, Yi Hou, Chao Liu, Songqing Hu
This study developed an efficient and green method for isolating and purifying lignin from black liquor (BL) using deep eutectic solvents (DESs). After the short and mild process (700 W microwave-assisted, 100 °C, DES: BL 1:5 (v: v), 30 min) using optimized DES (lactic acid (LA): choline chloride (ChCl) 10:1, molar ratio), the yield and purity of lignin obtained from 100 mL BL was 1.58 g and 88.12%
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Flocculation of alkyl ketene dimer and calcium carbonate on paper sizing and filling performance Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-03-06 Lihong Zhao, Xun Ke, Zhiwei Wang, Min Wu, Junrong Li, Liying Qian, Junli Ren
In order to solve the conflict between precipitated calcium carbonate (PCC) filling and alkyl ketene dimer (AKD) sizing for paper, this study explored two new flocculation methods: AKD and PCC were flocculated separately in the process ((A)(P)F), while the two pre-flocs from AKD and PCC were blended in the process ((AP)F). The result showed that increasing the dosage of the flocculant cationic starch
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Technical kraft lignin from coffee parchment Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-02-20 Marcela Ribeiro Coura, Antonio Jacinto Demuner, Iara Fontes Demuner, Daiane Einhardt Blank, Maria José Magalhães Firmino, Fernando José Borges Gomes, Ana Márcia Macedo Ladeira Carvalho, Marcelo Moreira Costa, Marcelo Henrique dos Santos
The biomass deconstructed by kraft process and the lignin dissolved in the black liquor are burned to generate energy in a pulp mill. This study used the black liquor from coffee parchment cooking, a residue from the coffee industry, to isolate kraft technical lignin. The parchment was subjected to the kraft pulping process to obtain pulps of kappa number 60 and 25, and the resulting black liquors
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Nitric acid-potassium hydroxide fractionation of rice straw: an integrated biorefinery initiative Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-01-30 M. Mostafizur Rahman, Nur-Al-Sarah Rafsan, Jannatun Nayeem, Razia Sultana Popy, Mohammad Moniruzzaman, M. Sarwar Jahan
Pulping of rice straw was studied using mild nitric acid in mild conditions. Spent nitric acid was chosen as soil nutrient rather than followed by the liquor recovery. The rice straw was treated with 11.03% nitric acid at 90 °C for 3 h, yielded 53.09% pulp. Nitric acid treated rice straw pulp had high residual lignin and minerals. However, further treatment with 7% potassium hydroxide reduced the residual
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Changes in water-vapor-adsorption isotherms of pulp fibers and sheets during paper recycling, including drying of wet webs, and disintegration and sonication of dried sheets in water Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-01-26 Minoru Kimura, Miyuki Takeuchi, Akira Isogai
A never-dried (ND) fines-free softwood bleached kraft pulp was converted to air-dried and thermally dried handsheets, which were then disintegrated or sonicated in water under various conditions. These disintegrated or sonicated pulps were converted to handsheets and used to obtain fundamental data on paper recycling. The water-vapor-adsorption isotherms of the pulp and sheet samples after super-critical-point
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Response surface methodology optimization and antimicrobial activity of berberine modified trimethoprim carboxymethyl cellulose Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-01-14 Gui Fu, Zhenzhen Chen, Yingping Qi, Hua Li
In order to solve the problem of bacterial resistance, increase the antibacterial performance and delay the aging of paper, the berberine modified trimethoprim carboxymethyl cellulose was prepared using trimethoprimethylate carboxymethyl cellulose as raw material and trimethoprimethylate lactate (TMP) as antibacterial modifier by Schiff Base reaction. At the same time, berberine (BBR) was used as graft
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Study on manufacturing hot water-resistant PVOH coated paper by gas grafting palmitoyl chloride (II)–Control of palmitoyl chloride penetration by inorganic pigments coating Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2023-01-09 Kwang-Seob Lee, Ji-Seon Choi, Kyoung-Hwa Choi, Jeong-Yong Ryu
In this experiment, we explored how to control the penetration of palmitoyl chloride in the gas grafting of PVOH-coated paper. When calcium carbonate was pre-coated, the gas grafting reaction of the PVOH-coated paper tended to be inhibited. It is believed that palmitoyl chloride is additionally consumed by moisture generated when calcium carbonate neutralizes hydrochloric acid gas, a by-product of
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Feasibility for the preparation of aerogels with celluloses extracted mildly from waste palm leaves Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-22 Rui Chen, Yi Hou, Jinchao Zhang, Jianxiang Cui, Guangsheng Li
Reasonable use and disposal of agricultural and forestry wastes become an urgent focus of attention with the dangers of pollution and squandering. In this paper, palm leaves, a typical kind of cellulose-rich agricultural and forestry waste, were attempted to prepare high-valued porous aerogels with cellulose by a short and mild extraction followed by the process of cross-linking with polyvinyl alcohol
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Microwave heating rate and dielectric properties of some agricultural wastes Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-21 Norulaina Alias, Muhammad Abbas Ahmad Zaini, Mohd Johari Kamaruddin
Interaction between the microwave heating rate and dielectric properties of agricultural wastes is important in identifying suitable microwave operating conditions. This work focuses on the interaction between microwave heating rate (power intensity) and dielectric properties of selected agricultural wastes, namely castor shell, empty fruit bunch and palm kernel shell. Heating rate was recorded every
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CaCO3 solubility in the process water of recycled containerboard mills Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-19 Stefan Bürgmayr, Joanne Tanner, Warren Batchelor, Andrew F.A. Hoadley
Water system closure in recycled containerboard mills may have reached a technical limit due to the accumulation of organic and inorganic contaminants in the process water. The specific water chemistry characteristics of recycled containerboard mills with restricted water systems were analyzed and a computer model was developed to simulate calcium carbonate solubility in the presence of volatile fatty
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Bending stiffness and moment capacity of cardboard obtained from three-point and elastica bending tests Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-16 Hiroshi Yoshihara, Masahiro Yoshinobu, Makoto Maruta
The bending properties of cardboard in the machine direction and cross direction were obtained via three-point bending and elastica bending tests using samples of various span lengths. The bending stiffness, moment at the proportional limit, and moment capacity per unit width were determined, and the effects of the testing method and span length were investigated. In the three-point bending test, the
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Experimental investigation into paper dust formation during knife edge cutting on a laboratory scale Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-09 Johannes Lunewski, Eberhard Schmidt
Especially in the field of paper and print post-processing on an industrial scale, continuous cutting operations generate paper dust. Despite preventive measures like dedusting units, a high paper web velocity induces the release of particulate dust. As a result, the particles settle and accumulate on machine components and in the surrounding area. Resuspended particles around a potential ignition
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Study on aging resistance of AAAS grafted in situ on paper documents Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-06 Deli Zeng, Huiming Fan, Shanshan Huang, Fengyu Li, Yunfei Liao, Ge Ge, Jianan Liu
Due to the complex storage environment, paper documents will suffer different degrees of damage during storage. Studying the aging behavior of paper after strengthening treatment is an important aspect of evaluate the effect of strengthening agent treatment. In this paper, the aging resistance properties of base paper, APTES, AEAPMDMS, and APTES/AEAPMDMS reinforced samples after dry heat aging and
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Application of TMP-DCMC-BBR/KH-791-SiO2/HPDSP multifunctional protective fluid in paper protection Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-12-02 Huijuan Shi, Zhenzhen Chen, Yingping Qi, Hua Li
A novel paper multifunctional protective solution was prepared by mixing berberine modified trimethoprimed carboxymethyl cellulose (TMP-DCMC-BBR), KH-791 modified nano-SiO2 (KH791-SiO2) and hydroxypropyl starch phosphate (HPDSP), and the mechanical properties, optical properties, antibacterial properties, aging resistance, acid and alkali resistance of the paper coated with the protective solution
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A study on forming limit diagram and laminated stamping of paperboard Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-11-30 Ying Gao, Yajie Li, Zhong Ji, Cunsheng Zhang, Guoxin Lu, Ren Liu
Coated paperboard not only has the advantages of traditional paper such as low density and cleanliness, but also overcomes its disadvantages such as poor barrier performance and sensitivity to moisture. It is more and more widely used in forming packaging containers. The current research on mechanical performance and inelastic deformation of paperboard mainly focus on its physical properties and simplified
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Ultrafiltration and reuse opportunities of sectorial effluents from a kraft pulp mill in Brazil Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-11-22 José Roberto Rosado Corrêa Filho, Cláudio Mudadu Silva, Daiane Cristina Diniz Caldeira, Leandro Coelho Dalvi, Deyvisson Araújo Nascimento, Rodrigo Silva Leite, Marcus Vinicius Gomes Veloso, Luewton Lemos Felício Agostinho, Gleb Timbalari, Hans Cappon, Zenilde das Graças Guimarães Viola, Marina Andrada Maria
The pulp industry is a high natural resources consumer and has a large polluting potential. The pulping sector with the most effluent generation is the bleaching plant. Based on the need of water consumption reduction, this research aimed to evaluate the treatment of the alkaline effluent from an EP-stage bleaching plant and the white water from drying machine using ultrafiltration membranes in order
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Adapting the kraft cooking process in glycerol media. Studies of impregnation kinetics Nord. Pulp Paper Res. J. (IF 1.2) Pub Date : 2022-11-15 Pär A. Lindén, Mikael E. Lindström, Martin Lawoko, Gunnar Henriksson
Although organosolv processes using high-boiling solvents have been investigated in recent decades for developing novel industrial processes, there are potential benefits of using high-boiling point solvents for traditional sulphate-based cooking processes, both from an industrial perspective and from a laboratory perspective. Using high-boiling solvents, experiments can be done under atmospheric conditions