The excessive use of plastics, in addition to the limitative capacities available for plastic waste disposal or recycle increased the interest in degradable polymers. Polylactic acid (PLA) and polyhydroxybutyrate (PHB) are among the most studied biobased polymers for packaging applications. However, their biodegradability in real environment is questionable. Therefore, the purpose of this study was

Considering the importance of polylactic acid (PLA) biopolymer in industry, in this research we represent a protocol that benefits from the presence of PA6 phase (30 wt%), using an ester-amide exchange catalyst and GN as nanofiller to enhance PLA mechanical properties. To this purpose, it was decided to fabricate blends and nanocomposites in the presence of cobalt(II) acetylacetonate (Cat) as the catalyst

Bacterial infection from medical devices is a significant problem and accounts for an increasing number of deaths and high medical costs. Surgical sutures are a major source of nosocomial infection through surgical wound contamination and the rates of which are increasing globally. One efficient way to prevent this is by modifying the surface of the sutures in such a way that no bacterial adhesion

The utilization of forest auxiliary products and their conversion into products with higher added value is important for the use of renewable resources. For this purpose, acorns belonging to the Q. coccifera species were collected in November, which is their ripening period, and dried and ground in the laboratory. Then, acorn starch (AS) was isolated from the sieved acorn flour. For 5 g of this isolated

The efficiency of the three types of cross-linked and functionalized with triethylenetetramine (As30 and As32) and acylate diethylenediamine (Cm26) acrylic polymers towards zinc ions from synthetic wastewaters has been investigated under different experimental conditions. The sorption and reusability of metal ions on three types of polymer were studied by the static and dynamic method. The effects

Development of the oxidation process of cellulose has occurred to decrease the reaction time. Dialdehyd cellulose (DAC) has synthesized via periodate oxidation under microwave irradiation and Graphen oxide (GO) was synthesized by modified Hummer method. A new composite of DAC/GO has prepared from GO and DAC. The structure and morphology of DAC, GO and DAC/GO composite were evaluated via Fourier transform

Residues and by-products are the unavoidable outputs of cereal, sugarcane and dairy processing industry which can be resorted economically. Widespread focus on plastic replacement, residue burning and waste reduction had led to characterization and identification of by-products for economic packaging applications. Extensive research work had been done on whey usage in eco-friendly packaging but packaging

Al2O3@SiO2 core–shell catalysts were synthesized by sol–gel method. The core size’control was provided by using of polyethylene glycol (PEG) and glycerol. The shell thickness was optimized by using the different amount of tetraethylorthosilicate (TEOS). The formation of core and shell structures in catalysts was seen in high resolution transmission electron microscopy (HRTEM) images. In some catalysts

Due to public concern about tetracycline (TC), it is imperative to eliminate this compound from the environment. This article describes the preparation of an efficient and low-cost porous copper alginate/graphene oxide (CA/GO) composite material by freeze-drying. The application of tetracycline removal in the presence of persulfate (PS) was studied. The effects of pH, PS, catalyst dosage and tetracycline

The wastewater discharge from the textile industry is a major threat to environmental safety, especially for developing countries. In this context, we proposed a biopolymer-based strategy to mitigate this issue. A new kind of immobilization by the zeta potential from Saccharomyces cerevisiae cell in the chitosan was tested. Two novel materials were produced and characterized: Chitosan beads (CB) synthesized

Formaldehyde-based resins are commonly used in the particleboard industry due to their high bonding strength and excellent water resistance. Nowadays, the healthy and sustainable issues lead to the development of bio-based wood adhesives. In the last past decade, soybeans were the most prominent crop for the production of environmentally friendly adhesive with no formaldehyde in its composition. This

There is growing concern about developing treatment technologies for the hazardous Polycyclic Aromatic Hydrocarbons (PAHs), because the rising levels of these compounds in the environment by human activities. The application of laccases has been evaluated as one of the most promising treatments. Thus, laccase immobilization on polyurethane foam (PUF)—low-cost material—was evaluated for bioremediation

The present study was conducted to investigate the effect of sodium hexametaphosphate (SHMP) (0, 0.1, 0.2, and 0.3 g), and olibanum essential oil (OEO; 0, 2%, 4%, and 6% w/v) on the physicochemical, structural, antioxidant, and microbial properties of the gelatin-based edible film, and its effect on the refrigerated storage period of rainbow trout fillet. The results demonstrated that the water solubility

Polyhydroxyalkanoates (PHAs) are bio-polyesters of hydroxyalkanoates that accumulate intracellularly in case of prokaryotes, as cytoplasmic granules, under carbon rich and paucity of nitrogen, phosphorous, sulphur and oxygen where it can serve as carbon and energy source under nutrient limiting condition and/or environmental stress conditions. In adverse growth conditions, many bacteria have ability

Gelatin was extracted from carp skin and reticulated with gallic acid; afterward, gelatin samples were crosslinked with addition of chitosan produced from shrimp waste and, bleached oil and free fatty acids (FFA) extracted from tuna heads. Carp gelatin showed good yield (20.4%), hydroxyproline content of 13.8% and high gel strength (245 g). Chitosan presented 85%DD and MW of 159 kDa, and the tuna oil

In this work, we examined ZSM-5 zeolite loaded polyvinyl alcohol-carboxymethyl cellulose-sodium alginate (PVA/CMC/SA) membrane for cationic dye (malachite green, MG) removal from aqueous environment. The crystallinity, chemical composition, surface morphology, hydrophilicity and thermal property of PVA/CMC/SA/ZSM-5 membrane was evaluated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy

Poly (3-hydroxybutyrate) (PHB) is a good alternative to petroleum-based plastics due to its biodegradable and biocompatible properties. In the present work, Cupriavidus necator ATCC 25207 was used for the first time to produce PHB using fructose, glucose, and acid or enzyme hydrolyzed molasses, a cheap carbon source. The bacterium produced highest PHB with 4.99 g/L, 3.94 g/L, and 15.28 g/L using fructose

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a copolymer synthesized by Bacillus megaterium co-utilizing cheese whey and food waste hydrolysate for its one-step production. The optimized substrate ratio of 60:40 (v/v) manifested maximum biomass of 3.09 ± 0.12 g/L and PHBV yield of 2.0 ± 0.3 g/L. Batch kinetics study revealed maximum biomass and PHBV yield of 3.05 ± 0.07 g/L and 2.175 ± 0

Bacterial cellulose (BC) membranes are an excellent ecopolymer product that has been proposed for many applications, including acoustic, biomedical, and fabrics. However, those uses require the membranes’ exposure to environmental conditions related to shelf storage, washing, or excess of humidity that are not usually evaluated when developing new materials. In this work, we investigated the effect

Application of bio-based diisocyanates with low volatility instead petrochemical diisocyanates has positive impact on environment by reduction of hazardous effects on living organisms and lead to bio-based polyurethanes (bio-PUs) with good usage properties. This work was focused on the synthesis and chosen properties examination of partially bio-based thermoplastic polyurethane elastomers (bio-PUs)

We have found that B(C6F5)3 in toluene can be an effective initiator for cationic polymerization of epoxidized fatty acid methyl esters and epoxidized oils with cis-disubstituted oxirane groups. The reaction is relatively fast, but controllable. The polymerization product of epoxy methyl oleate was a mixture of linear and cyclic oligomers of molar masses up to 27,000. MALDI-TOF analysis of oligomers

The aim of present study is to extract microcrystalline cellulose (MCC) from fruit bunch branches fibers of Algerian date palm trees (phoenix dactylifera L) as biofiber for reinforcing green composite and thus replace synthetic fibers in various applications. The extraction of MCC from date palm fibers passed via serial chemical treatments, including alkali, bleaching and acid hydrolysis process. Subsequently

The objective of the current work was to evaluate the efficiency of novel antimicrobial edible coatings based on chitosan (CH), sodium alginate (SA), and carboxymethyl cellulose (CMC) with an eco-friendly antimicrobial microcrystalline cellulose (AMCC) and probiotic strains (Bifidobacterium lactis, Lactobacillus acidophilus, and Lactobacillus casei). These edible films were applied for preservatives

Bioactive packaging is gaining interest in food preservation as an alternative to the incorporation of additives to food formulations. Yeast cell wall is a good candidate for the formation of biodegradable films. In this context, enzymatically hydrolysed yeast cell wall (YCW-E) and fungal extracts, containing naphtho-γ-pyrones (NGPs), were used to develop bioactive materials with antioxidant activity

In this study, a novel bead form IPN type resin comprising poly (2-Dimethylaminoethyl) methacrylate and carboxymethyl chitosan networks with a high dye adsorption capacity. The adsorbent was synthesized by a combination of serial reactions, including bead formation, cross-linking, and carboxymethylation of chitosan, then the photo-polymerization of DMAEM inside these beads. To assess the simultaneous

In this study, the production and physicochemical characterization of exopolysaccharide (EPS) produced by Lysinibacillus fusiformis KMNTT-10 were investigated. Also, in vitro assays were conducted to investigate the biotechnological functional activities of EPS, including flocculation, emulsification, and antioxidant activity. Results showed that the maximum EPS produced by strain KMNTT-10 was 4.19 g/l

The use of agroindustry by-products as reinforcements and/or composites filler is an innovative and economically attractive option that is still under study. Hence, the present work aims to study composite foams based on cassava-starch and sunflower oil press cake (SOPC), an oil industry by-product, using urea as an additive to enhance the biocomposites foaming capacity. Filler content (0, 20, and

Waste glycerol from biodiesel production (bioglycerol) can be used for obtaining rigid thermoset materials. In order to gain insights into applicability and final disposition of these renewable materials it is necessary evaluate their long-term behavior under environmental conditions as well as their biodegradability performance. A methyl methacrylate copolymer obtained from bioglycerol was subjected

Biocomposites based on polyethylene from renewable resources derived from sugar cane as raw material were modified with phosphonium ionic liquids. Mechanical properties and thermal behavior of modified biocomposites in air atmosphere were studied. The influence of ionic liquids (IL) on thermal degradation of biocomposites based on polyethylene from renewable resources was studied by thermogravimetric

The major roadblock for recycling of waste electrical and electronic equipments (WEEE) depends on the viability of sorting process, which is a complex task, involving various techniques such as sink float, froth flotation, optical separation and manual separation, etc. This makes the sorting process highly time consuming and expensive. The primary aim of this investigation is to study the properties

Chitosan biopolymer was extracted from chitin and utilized for the synthesis of CaNiFe2O4/Chitosan as a new magnetic nanocomposite. The structural and morphological properties of the synthesized samples were characterized by FT-IR, XRD, XPS, SEM, and TEM techniques. Adsorption of methylene blue (MB) was evaluated onto CaNiFe2O4/Chitosan nanomaterial. UV–Vis spectrophotometry was used to monitor the

This work aims to investigate the effect of organically modified montmorillonite (OMMT) and vermiculite (OVT) clays on the properties of poly(lactic acid) (PLA)/bio-based polyethylene (BioPE)/clay biocomposites. Ethylene-methyl acrylate-glycidyl methacrylate (EMA-GMA) copolymer was used to improve the interactions between the clay and the bio-based polymers. X-ray diffraction (XRD) patterns indicated

The cyclic carbonates as non-isocyanate polyurethane (NIPU) precursors are usually prepared via CO2 fixation under harsh conditions for a satisfactory conversion rate, which is energy-intensive. Herein, cyclic carbonate was prepared under ambient conditions with high purity and yield using a water-soluble ethyl-(N′,N′dimethylamino) propylcarbodiimide hydrochloride (EDC) to provide a favored industrialization

In this study, novel composite aerogels of peach gum/activated carbon (PGAC) and peach gum/graphene oxide (PGGO) were synthesized by freeze-drying method for removing methylene blue (MB) from water. The methods of the scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and Brunauer–Emmett–Teller (BET) are used to characterize the adsorbents. It is important to study the

Owing to develop the utilization of biowaste materials and minimize the usage of plastic materials, Orange peel Powder (OPP) biowaste is chosen as filler material along with Polyvinyl Alcohol (PVA) as a matrix to form biocomposite films. To stretch its applications to antibacterial applications the metal nanoparticles were incorporated by the in-situ generation of Ag by reducing the various concentration

Recycling plastic waste by mix with natural polymers for bio-plastic packaging produces plastics with high mechanical properties and easily degradable. In this study, the relation between the structural and the optical properties of composite SPF/starch/chitosan/polypropylene to the mechanical properties and degradation performance were analyzed. Structural and optical properties of composite bioplastic

An environmentally friendly packaging material was produced from starch with the incorporation of citrus lemon peel ethanol extract. Gas chromatography-mass spectrometry of the citrus lemon extract revealed the presence of compounds such as fatty acid, terpenes, aromatic esters, aldehyde, and polyphenolics. Bioplastic films produced with different percentages of the citrus lemon ethanol extract are

Starch, a renewable polysaccharide, has attracted growing interest as an alternative industrial feedstock due to its biodegradability, low cost, and readily available hydroxyl (–OH) group, thereby according it the potential of possible modification. Despite its environmental suitability, several factors such as brittleness, sensitivity to enzymes and acids, insolubility in organic solvents etc., have

Lignocellulosic biosorbents for wastewater treatment are generally powders. However, powdered biosorbents require the time and energy taken up in grinding and sieving. In this work, lignocellulosic biosorbents were prepared in fiber form from lemongrass leaf (LGL), through a simple, green procedure using various chemical treatment conditions. Scanning electron microscopy (SEM) revealed the reduced

In this experiment, chitosan (CS), waste limestone and diammonium hydrogen phosphate were used as raw materials to synthesize HAp-coated-stone composites/CS by one-step blending method. Then, the prepared HAp-coated-stone composites/CS composite material was used to remove Cu (II) in the solution. The structure and microstructure of the composite were characterized by Fourier transform infrared spectroscopy

As global population escalates; the need for better healthcare shall inevitably intensify. Current scenario, thus, calls for a versatile technology for the construction for smart biomaterials to cater to the needs. In this context; hydrogels comprising carboxymethyl chitosan and polyvinyl alcohol (CMCS/ PVA) were fabricated using a green crosslinker, tetraethyl orthosilicate. To enhance their bio-efficacy;

A series of malonic acid treated camelthorn (MATC) sorbents were produced via the reaction of camelthorn biomass with malonic acid, and factors affecting the extent of modification were investigated, including malonic acid concentration, dehydration time and temperature. The optimum sorbent, by carboxylic acid content, was subsequently characterised for surface charge behaviour (pHPZC), surface chemical

The original version of this article has unfortunately contained a spelling mistake in the third author name. The correct name of the third author is Mohamed Hasanin.

The article Fused Deposition Modeling of Poly (lactic acid)/Nutshells Composite Filaments: Effect of Alkali Treatment, written by Xiaohui Song, Wei He, Xingguo Han, Huadong Qin was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 29 July 2020 with open access. With the author(s)’ decision to step back from Open Choice, the copyright of the article changed

In this study, a novel biosorbent was prepared by the modification of sodium alginate with thiosalicylic acid in the presence of calcium ions (TS-A). TS-A was then characterized and its removal performance for Cu(II) and Cd(II) ions from the aqueous solutions was investigated. The effects of batch and column parameters on the biosorption were systematically investigated. The obtained data from the

This work aimed to study the effect of modified cassava starches, and PVA grade on the properties of biodegradables sheets produce with starch/PVA blends by an extrusion-calendering process; using native starch, distarch phosphate, acetylated distarch phosphate, acetylated distarch adipate or oxidized starch; PVA with 88% and 98% hydrolysis degrees (HD), and glycerol as a plasticizer. The sheets had

Urushiol (UR) was a kind of natural paint with a long history and excellent performance. Its high price restricts its development. For the sake of the sustainable development of UR, we prepared a new urushiol based coating composition which is of degradation. To be more specific, we develop a blend by diallyl trisulfide (TS) and urushiol, in which a free radical copolymerization process would take