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  • Development of sustainable flame-retardant materials
    Green Mater. (IF 1.692) Pub Date : 2020-09-17
    TriDung Ngo

    Due to environmental concerns and the depleted availability of petroleum resources, green and natural renewable materials have increasingly received much attention for different industrial applications. The incorporation of renewable resources in materials is a viable means to reduce environmental impact and support sustainable development in industry. Regarding these concerns, flame-retardant materials

  • Phytic acid-based flame retardants for cotton
    Green Mater. (IF 1.692) Pub Date : 2020-09-17
    Anuttam Patra; Sara Kjellin; Anna-Carin Larsson

    Development of sustainable flame retardants for cotton-based materials has become an active research interest as many of the currently used flame retardants are harmful both to the environment and to human health. Phytic acid is a natural resource that has shown potential to be an environment-friendly flame retardant. In order to design highly efficient flame retardants based on phytic acid, detailed

  • Renewable nanobrick wall coatings for fire protection of wood
    Green Mater. (IF 1.692) Pub Date : 2020-09-17
    Thomas J Kolibaba; Jacob T Brehm; Jaime C Grunlan

    Home-structure fires account for 77% of fire deaths and result in more than US$7·7 billion in property damage every year. Wood is a major component in home construction and decoration due to its mechanical properties, aesthetic appeal and renewability, but its inherent flammability poses an ongoing risk. Layer-by-layer-assembled nanocoatings are effective for improving the fire safety of a variety

  • Formulation of eco-friendly sol–gel coatings to flame-retard flexible polyurethane foam
    Green Mater. (IF 1.692) Pub Date : 2020-09-17
    Séverine Bellayer; Maude Jimenez; Sophie Barrau; Adeline Marin; Johan Sarrazin; Serge Bourbigot

    Sol–gel coatings containing diethylphosphite can efficiently protect polyurethane (PU) foam from fire. However, diethylphosphite can cause an allergic skin reaction and produce toxic fumes during combustion. The purpose of this study was to screen alternative additives to replace diethylphosphite. The screened flame-retardant molecules were phosphorus donors of low toxicity compared with halogenated

  • Tannic acid-based prepolymer systems for enhanced intumescence in epoxy thermosets
    Green Mater. (IF 1.692) Pub Date : 2020-09-17
    Matthew Korey; Alexander Johnson; William Webb; Mark Dietenberger; Jeffrey Youngblood; John Howarter

    Tannic acid (TA) is a bio-based high-molecular-weight organic molecule. Although biologically sourced, TA is a pollutant in industrial wastewater streams, and there is desire to find applications in which to downcycle this molecule. Many flame retardants (FRs) used in epoxy are synthesized from petroleum-based monomers. Various bio-based modifiers have been developed, but increasing the flame retardancy

  • Intumescent polydopamine coatings for fire protection
    Green Mater. (IF 1.692) Pub Date : 2020-09-17
    Douglas M Fox; Whirang Cho; Laura Dubrulle; Philipp G Grützmacher; Mauro Zammarano

    Polydopamine with additional bioderived flame retardants was used as coatings for flexible polyurethane foam and triple-wall corrugated cardboard. Clay was used to prevent the foam from collapsing during combustion. Dopamine can also effectively intercalate clay to produce well-distributed coatings, so it was used in all coatings. Scanning electron microscopy was used to examine the morphology of the

  • Turning low-cost recycled paper into high-value binder-free all-cellulose panel products
    Green Mater. (IF 1.692) Pub Date : 2020-06-16
    Raquel Arévalo; Nattakan Soykeabkaew; Ton Peijs

    In this work, the feasibility of producing low-cost, recyclable and biodegradable binderless all-cellulose fibreboards was demonstrated through the successful manufacturing of self-binding composites based on recycled paper and kraft fibres. These all-cellulose composites were made by a simple and environmentally friendly solvent-free mechanical fibrillation method using water as a processing aid.

  • Wheat straw biorefinery for agricultural waste valorisation
    Green Mater. (IF 1.692) Pub Date : 2020-06-16
    Seyed Hamidreza Ghaffar

    This study justifies strategies for a new concept of agricultural waste management prior to biorefinery, based on comprehensive materials science investigations. Efficient pretreatments for the extraction, separation and fractionation of agricultural waste in conjunction with understanding of the details of its microstructure and properties can be essential for high-efficiency biorefinery. The information

  • Properties of poly(butylene-co-isosorbide succinate) after blown film extrusion
    Green Mater. (IF 1.692) Pub Date : 2020-06-16
    Dezhi Qu; Lipeng Wang; Shuai Sun; Hongwei Gao; Yongping Bai; Liping Ding

    In this study, the sugar-based monomer isosorbide (IS) was used to improve the properties of poly(butylene succinate) (PBS). The molecular weight of all copolyesters was approximately 100 000 g/mol, and they presented a random microstructure combined with excellent thermal stability. The IS-containing copolyesters were all semicrystalline, and both their crystallinity and crystallization rate decreased

  • A new bio-based fibre-reinforced polymer obtained from sheep wool short fibres and PLA
    Green Mater. (IF 1.692) Pub Date : 2020-06-16
    Miguel Fernando Aldas Carrasco; Nicolas Jérôme Rouault; José Miguel Ferri Azor; Juan López-Martínez; María Dolores Samper Madrigal

    Within the cheese industry is used the milk of a specific species of sheep whose wool is not suitable for the fibre industry. Therefore, this fibre becomes a waste by-product. To take advantage of this waste, the formulation of a fibre-reinforced polymer based on a poly(lactic acid) (PLA) matrix plasticised with maleinised linseed oil (MLO) is proposed. The work began by evaluating the feasibility

  • Novel alternative for the purification of kaolin by plant acid extracts
    Green Mater. (IF 1.692) Pub Date : 2020-06-16
    Patricia Nayeli Olvera Venegas; Maricela Villanueva Ibáñez; Marco Antonio Flores González; Ariadna Itzel Reyes Aparicio; María de los Ángeles Hernández Pérez

    Clay minerals of great purity are scarce; such is the case of kaolin. Many methods currently used for its purification damage some characteristics of industrial interest of the clay mineral, and these methods are aggressive to the environment. For this reason, in this work, the purification of kaolin was carried out using the extracts of Citrus latifolia, Citrus aurantifolia, Opuntia joconostle and

  • Design of eco-friendly PVA/TiO2-based nanocomposites and their antifungal activity study
    Green Mater. (IF 1.692) Pub Date : 2020-03-17
    ChougaleRavindra; KasaiDeepak; NayakShilpa; MastiSaraswati; NasalapureAnand; RaghuAnjanapura V

    In the current study, poly(vinyl alcohol) (PVA)/titanium dioxide (TiO2)-based nanocomposite films were prepared using the solution-blending and solvent-evaporation techniques. The tensile properties and phase morphology of the prepared PVA/titanium dioxide nanocomposite films were investigated using universal testing machine (UTM) tests and scanning electron microscopy, respectively. Further, the water

  • Terrestrial fugitive plastic packaging: the blind spot in resolving plastic pollution
    Green Mater. (IF 1.692) Pub Date : 2020-03-17

    An opinion piece highlighting the role plastic packaging, particularly single-use commodity packaging, contributes to global plastic pollution. The article specially unpacks the quantities found on land in comparison to those found in the marine environment. While land-based plastic pollution is approximately three times bigger in terms of scale, the article notes that current research and development

  • Progress in development of epoxy resin systems based on biomass resources
    Green Mater. (IF 1.692) Pub Date : 2020-03-17
    JiaPuyou; MaYufeng; KongQinying; XuLulin; LiQiaoguang; ZhouYonghong

    Bio-based curing agents and epoxy resins have been used extensively for decades to replace petrochemical-based curing agents and epoxy resins due to their low environmental impact, easy availability, low cost and biodegradability. Petrochemical resources are nonrenewable resources; it is difficult to guarantee the sustainable development prospect for long-term exploitation. As a result, resin manufacturers

  • Green ion-exchange bisfuranic polyamides by polycondensation with bio-based diamines
    Green Mater. (IF 1.692) Pub Date : 2020-03-17
    AliDalia K; Al-ZuheiriAya M; SweilehBassam A

    A monomer fully based on renewable materials was prepared from methyl 2-furoate and levulinic acid by condensation reaction under acidic conditions. The monomer is used for the synthesis of ion-exchange polyamides based on a new family of bisfuranic diesters. Polyamides prepared using typical melt polycondensation have provided a relatively simple and reliable way of preparing linear furanic polycondensates

  • Protein aggregation in aqueous poly(vinyl alcohol) solutions
    Green Mater. (IF 1.692) Pub Date : 2020-03-17
    HanzlyLaura E; DeButtsBarbara L; ShellDanielle; BaroneJustin R

    Proteins that have previously been self-assembled into β-sheet-containing structures in aqueous solution are incubated in aqueous poly(vinyl alcohol) (PVA) solutions of varying PVA molecular weights and therefore viscosities. Fourier transform infrared (FTIR) spectroscopy shows that the self-assembly is driven by protein–protein hydrophobic interactions that correspond to the formation of a β-sheet

  • Antifouling silicones based on surface-modifying additive amphiphiles.
    Green Mater. (IF 1.692) Pub Date : 2017-03-01
    Marc A Rufin,Bryan Khai D Ngo,Mikayla E Barry,Vanessa M Page,Melissa L Hawkins,Shane J Stafslien,Melissa A Grunlan

    Surface modifying additives (SMAs), which may be readily blended into silicones to improve anti-fouling behavior, must have excellent surface migration potential and must not leach into the aqueous environment. In this work, we evaluated the efficacy of a series of poly(ethylene oxide) (PEO)-based SMA amphiphiles which varied in terms of crosslinkability, siloxane tether length (m) and diblock versus

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