High-Performance Recyclable and Malleable Epoxy Resin with Vanillin-Based Hyperbranched Epoxy Resin Containing Dual Dynamic Bonds

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(30), С. 11077 - 11087

Опубликована: Июль 18, 2023

Dynamic covalent polymer networks represent new opportunities in the design of sustainable epoxy resins due to their excellent malleability and reprocessability; however, adaptable network is usually accompanied by low glass transition temperature, poor creep resistance, mechanical brittleness. Herein, we demonstrate a vanillin-based hyperbranched resin (VEHBP) containing disulfide imine dynamic bonds for recyclable malleable with high temperature (Tg), significantly improved properties. The 5%VEHBP exhibited 175 °C 130 34.1, 19.7, 173.3% increase tensile strength, storage modulus, toughness respectively, compared neat resin. Meanwhile, topological structure VEHBP complemented dual endowed these materials self-healing ability, reprocessability, degradability, which represents an important step toward fabrication high-performance networks.

Язык: Английский

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A Biobased Epoxy Vitrimer with Dual Relaxation Mechanism: A Promising Material for Renewable, Reusable, and Recyclable Adhesives and Composites

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(15), С. 5965 - 5978

Опубликована: Апрель 4, 2024

This study presents the synthesis of a novel biobased epoxy monomer derived from vanillin and cystamine, incorporating imine disulfide exchangeable groups within its structure. A series epoxy-based vitrimers with two simultaneous exchange relaxation processes have been produced using this monomer. These mechanisms operate without need for any catalyst. Four different amine curing agents employed to achieve glass transition temperatures around 100 °C excellent thermal stability. Through dynamic-mechanical analyses, thermomechanical properties vitrimeric characteristics investigated, revealing remarkably fast stress at relatively low significant creep below temperature. Leveraging dual mechanism, chemical degradability these has explored through accessible methodologies, material's reformation after degradation demonstrated in both cases. Furthermore, material mechanically recycled, maintaining almost same properties. Finally, materials used fabricate recycle carbon-fiber-reinforced composite reversible adhesives, showcasing their promising potential applications.

Язык: Английский

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Taking dynamic covalent chemistry out of the lab and into reprocessable industrial thermosets

Nature Reviews Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Язык: Английский

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Disulfide vitrimeric materials based on cystamine and diepoxy eugenol as bio-based monomers

European Polymer Journal, Год журнала: 2023, Номер 194, С. 112185 - 112185

Опубликована: Май 30, 2023

This study reports the synthesis and characterization of bio-based disulfide vitrimers obtained from diepoxy eugenol cystamine through an epoxy-amine polycondensation process. TREN was added to formulation in varying proportions increase crosslinking density. Although reduced number groups vitrimers, it resulted a maximum relaxation rate at proportion 25%. The were characterized using FTIR, TGA, thermomechanical analysis, their Tg values, determined by DSC, ranged 75 103 °C with increasing proportion. rapidly relax time (τ) 8.5 min 170 °C. addition decreased times 2.8 1.03 catalyzing metathesis achieving balance between bonds content nucleophilic tertiary amines. Creep tests performed wide range temperatures investigate viscosity material below above Tgs. topology freezing calculated creep tests, Tv values all cases confirmed catalytic effect amines on exchange reaction.

Язык: Английский

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From vanillin to biobased aromatic polymers

Polymer Chemistry, Год журнала: 2023, Номер 14(37), С. 4255 - 4274

Опубликована: Янв. 1, 2023

This review highlights the recent advances and synthetic routes for development of different vanillin-based polymers, including thermosets, thermoplastics, covalent adaptable networks (CANs), their properties.

Язык: Английский

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Biobased, reprocessable, self-blown non-isocyanate polyurethane foams: Influence of blowing agent structure and functionality

European Polymer Journal, Год журнала: 2024, Номер 206, С. 112775 - 112775

Опубликована: Янв. 19, 2024

Язык: Английский

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Study on the properties of chitosan-modified epoxy resins and their composites

Composites Communications, Год журнала: 2024, Номер 51, С. 102060 - 102060

Опубликована: Авг. 29, 2024

Язык: Английский

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Preparation, characterization, and application of waterborne lignin-based epoxy resin as eco-friendly wood adhesive

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 259, С. 129327 - 129327

Опубликована: Янв. 12, 2024

Язык: Английский

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Vanillin-based dual dynamic epoxy building block: a promising accelerator for disulfide vitrimers

Polymer Chemistry, Год журнала: 2024, Номер 15(13), С. 1347 - 1357

Опубликована: Янв. 1, 2024

A dual-dynamic bio-based epoxy building block (DDBB) with both imine and disulfide bonds synthesized from cystamine vanillin showed accelerated dynamic exchanges in vitrimer formulations.

Язык: Английский

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Sustainable epoxy vitrimer materials with imine and disulfide bonds prepared from epoxidized soybean oils

Industrial Crops and Products, Год журнала: 2025, Номер 225, С. 120435 - 120435

Опубликована: Янв. 9, 2025

Язык: Английский

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