Flame retardance behaviour and degradation of plant-based natural fiber composites – A comprehensive review

Construction and Building Materials, Год журнала: 2024, Номер 432, С. 136552 - 136552

Опубликована: Май 17, 2024

Язык: Английский

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Dynamic Cross-linked Poly(butylene adipate-co-terephthalate) for High-Performance Green Foam

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(45), С. 16354 - 16364

Опубликована: Ноя. 1, 2023

The insufficient molecular weight of linear poly(butylene adipate-co-terephthalate) (PBAT) leads to poor foamability and mechanical performance foams, which seriously restricts the industrial application PBAT as foam materials. Herein, biobased itaconic anhydride was grafted onto backbone, then epoxidized soybean oil added obtain a dynamic cross-linked network based on Zn(II)-catalyzed transesterification. rheology results showed that storage modulus viscosity vitrimers increased obviously, exhibiting viscous liquid-like elastic solid-like transition behavior with increasing degrees. Reversible cleavage cross-links reformation integrated through rebonding bonds were observed under shears alternative large- low-amplitude oscillations, endowing fluidity elasticity during processing. exhibited strain-hardening in an extensional flow could be foamed by supercritical carbon dioxide foaming. lightweight show expansion ratio up 26.7-fold density 0.045 g/cm3. On coupling cell structure properties contributed network, foams enhanced elasticity, specific compressive strength, damping properties. strategy altering viscoelasticity simultaneously cross-linking provides new approach toward obtaining high-performance foams.

Язык: Английский

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A facile strategy to achieve vitrimer-like elastomer composites with lignin as a renewable bio-filler toward excellent reinforcement and recyclability

Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(46), С. 25356 - 25367

Опубликована: Янв. 1, 2023

Vitrimer-like elastomer composites with lignin as a renewable bio-filler, showing effective reinforcement, recyclability and photothermal performance, were prepared.

Язык: Английский

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Fully Biobased and Mechanically Robust Elastomeric Vitrimer based on Epoxidized Natural Rubber and Dynamic Imine Bonds

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(48), С. 17190 - 17198

Опубликована: Ноя. 16, 2023

Currently reported epoxidized natural rubber (ENR)-derived elastomeric vitrimers were usually limited by the poor mechanical properties and utilization of nonrenewable chemicals to introduce dynamic cross-links. In this study, we report fully biobased mechanically robust based on imine bonds prepared from ENR, vanillin, 1,10-decanediamine. The fabrication procedures included two steps, i.e., preparation a cross-linker (DC) vanillin 1,10-decanediamine subsequent cross-linking ENR with DC. (BEVs) different DC/ENR ratios prepared, effects DC contents tensile properties, elasticity, stress relaxation, reprocessability BEVs investigated in detail. BEV showed increased strength Young's modulus but reduced elongation at break an increasing content. up 19.44 ± 1.39 MPa higher than 880% was achieved controlling ratio. All excellent elasticity strain recovery ratio 80% after stretching 500%. could relax rapidly high temperatures, which endowed them thermal recyclability. With combination robustness, reprocessability, recyclability, exhibit potential as sustainable substitutes conventional ENR-derived permanently cross-linked rubbers.

Язык: Английский

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Design of sacrificial network in modified natural rubber leads to strikingly improved mechanical performance with self-healing capability

Chemical Engineering Journal, Год журнала: 2023, Номер 474, С. 145838 - 145838

Опубликована: Сен. 4, 2023

Язык: Английский

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Catalyst-free epoxy vitrimers from rosin: Highly mechanical performance, fast self-healing, and facile recycling

European Polymer Journal, Год журнала: 2023, Номер 202, С. 112606 - 112606

Опубликована: Ноя. 19, 2023

Язык: Английский

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Enabling simultaneous reprocessability and fire protection via incorporation of phosphine oxide monomer in epoxy vitrimer

Journal of Material Science and Technology, Год журнала: 2024, Номер 196, С. 224 - 236

Опубликована: Март 14, 2024

The conception of epoxy thermosets with both reprocessability and flame retardancy delineates a new horizon in polymer science, offering material solution that is not only superior fire safety but also environment friendly. Herein, flame-retardant vitrimer (EV) was prepared using partially bio-based IADPPO (diphenylphosphine oxide itaconic anhydride) citric acid as curing reagents via solvent-free process. Their incorporation created covalent adaptable networks (CANs) the matrix which promote recyclability. EV exhibits excellent thermal stability high initial decomposition temperature (T-5wt% ∼308°C) glass transition (Tg ∼107°C), similar to blank (115°C). retardancy, mechanical properties, transesterification-based reprocessability, mechanism were investigated. containing 3 wt% phosphorus (EV 3P) achieved UL-94 V0 classification limiting oxygen index (LOI) 27 %, while virgin sample Blank (without phosphorus) burned completely. Additionally, increased flexural strength 79 % observed for 3P compared EV. Furthermore, showed malleability reparability could be thermomechanically reprocessed without sacrificing thermal, mechanical, properties. Thus, newly developed fire-safe fulfills sustainability goals today's society.

Язык: Английский

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A Curing Agent for Facile Fabrication of Intrinsically Flame-Retardant Epoxy Vitrimers with Catalyst-Free Mixed Carboxylate/Phosphonate Transesterification

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(14), С. 8159 - 8168

Опубликована: Июль 12, 2024

Epoxy vitrimers combine the advantages of thermosetting and thermoplastic materials, making them an ideal alternative to traditional resins. However, fabrication high-performance flame-retardant epoxy remains a challenge. In this study, utilizing (2-carboxyethyl)phenylphosphinic acid (CEPPA) as curing agent, we facilely fabricated dual-dynamic vitrimer incorporating carboxylate esters phosphonate (CEEP). Compared resin (DDEP), exhibited tensile strength comparable resins significantly outperformed in terms Young's modulus. comparison ester (PAEP), CEEP demonstrated improved solvent resistance ability for recycling without need catalyst. Additionally, outstanding flame retardancy, achieving V-0 rating UL-94 testing, with remarkable 66.9% reduction peak heat release rate (PHRR) significant 34.5% decrease total (THR) cone calorimetry test compared DDEP. The work offers promising way facile vitrimers.

Язык: Английский

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Biobased Recyclable Rubbers With Shape Memory, Self-welding, and Damping Properties by Cross-Linking Epoxidized Natural Rubber with Succinic Anhydride

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(51), С. 18123 - 18130

Опубликована: Дек. 14, 2023

This study focuses on the development of green and high-performance recyclable polymers using cross-linked epoxidized natural rubber (ENR). ENR, derived from biobased rubber, offers reactive epoxy groups that make it an ideal raw material for creating materials. Succinic anhydride (SA) is employed as a cross-linking agent, forming dynamic ester bonds through ring-opening reactions with groups. The resulting ENR demonstrates excellent mechanical properties without need fillers (the tensile strength ENR40+SA-10 reached up to 17.85 MPa), along stable shape memory (shape fixed ratio > 97.0%, recovery 94.5%), high recyclability ratios elongation at break 95% after two recycling circles), self-welding properties. Moreover, adjustable Tg values (−30 19 °C) wide damping temperature range materials provide good characteristics, including those room temperature. simple efficient strategy new approach production ENR-based materials, which will potentially contribute reducing environmental pollution expending their applications in areas such vibration packaging.

Язык: Английский

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Construction of robust and fully bio-based epoxy vitrimers with facile malleability, self-healing ability, and recyclability from peach gum polysaccharide and itaconic acid

Industrial Crops and Products, Год журнала: 2023, Номер 208, С. 117779 - 117779

Опубликована: Ноя. 24, 2023

Язык: Английский

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