Closed-loop recyclability of a biomass-derived epoxy-amine thermoset by methanolysis

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-04-12 DOI:10.1126/science.adj9989

Xianyuan Wu, Peter Hartmann, Dimitri Berne, Mario De bruyn, Florian Cuminet, Zhiwen Wang, Johannes Matthias Zechner, Adrian Daniel Boese, Vincent Placet, Sylvain Caillol, Katalin Barta

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Abstract

Epoxy resin thermosets (ERTs) are an important class of polymeric materials. However, owing to their highly cross-linked nature, they suffer from poor recyclability, which contributes to an unacceptable level of environmental pollution. There is a clear need for the design of inherently recyclable ERTs that are based on renewable resources. We present the synthesis and closed-loop recycling of a fully lignocellulose-derivable epoxy resin (DGF/MBCA), prepared from dimethyl ester of 2,5-furandicarboxylic acid (DMFD), 4,4′-methylenebis(cyclohexylamine) (MBCA), and glycidol, which displays excellent thermomechanical properties (a glass transition temperature of 170°C, and a storage modulus at 25°C of 1.2 gigapascals). Notably, the material undergoes methanolysis in the absence of any catalyst, regenerating 90% of the original DMFD. The diamine MBCA and glycidol can subsequently be reformed by acetolysis. Application and recycling of DGF/MBCA in glass and plant fiber composites are demonstrated.

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通过甲醇分解实现生物质衍生环氧胺热固性物质的闭环可回收性

环氧树脂热固性塑料（ERT）是一类重要的聚合物材料。然而，由于其高度交联的性质，它们的可回收性很差，造成了不可接受的环境污染。显然，我们需要设计出基于可再生资源的固有可回收 ERT。我们介绍了由 2,5-呋喃二甲酸二甲酯（DMFD）、4,4′-亚甲基双（环己基胺）（MBCA）和缩水甘油制备的可完全衍生木质纤维素的环氧树脂（DGF/MBCA）的合成和闭环回收，该树脂具有优异的热机械性能（玻璃化转变温度为 170°C，25°C 时的储存模量为 1.2 千兆帕）。值得注意的是，这种材料在没有任何催化剂的情况下也能进行甲醇分解，再生出 90% 的原始 DMFD。随后，二胺 MBCA 和缩水甘油可通过乙醇分解进行重整。演示了 DGF/MBCA 在玻璃纤维和植物纤维复合材料中的应用和回收。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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