奥地利格拉茨大学Katalin Barta团队报道了生物质衍生环氧胺热固性物甲醇分解的闭环可回收性。相关研究成果于2024年4月12日发表在《科学》杂志上。

环氧树脂热固性材料（ERTs）是一类重要的聚合物材料。然而，由于其高度交联的性质，它们的可回收性较差，这导致了不可接受的环境污染水平。显然需要设计基于可再生资源的固有可回收ERTs。

研究人员介绍了一种完全木质纤维素衍生物环氧树脂（DGF/MBCA）的合成和闭环回收，该树脂由2，5-呋喃二羧酸二甲酯（DMFD）、4，4′-亚甲基双（环己胺）（MBCA）和缩水甘油制备，表现出优异的热机械性能（玻璃化转变温度为170°C，25°C时的储能模量为1.2GPa）。

值得注意的是，该材料在没有任何催化剂的情况下进行甲烷分解，再生90%的原始DMFD。二胺MBCA和缩水甘油随后可以通过乙酰裂解进行重整。研究人员介绍了DGF/MBCA在玻璃纤维和植物纤维复合材料中的应用和回收利用。

附：英文原文

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

Author: 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

Issue&Volume: 2024-04-12

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.

DOI: adj9989

Source: https://www.science.org/doi/10.1126/science.adj9989