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

• 成果类型: Article
• 署名作者: Wu, Xianyuan; Hartmann, Peter; Berne, Dimitri; De Bruyn, Mario; Cuminet, Florian; Wang, Zhiwen; Zechner, Johannes Matthias; Boese, Adrian Daniel; Placet, Vincent; Caillol, Sylvain; Barta, Katalin
• 署名单位: University of Groningen; University of Graz; Ecole nationale superieure de chimie de Montpellier; Centre National de la Recherche Scientifique (CNRS); Universite de Montpellier; Universite Marie et Louis Pasteur; Centre National de la Recherche Scientifique (CNRS)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8362
• DOI: 10.1126/science.adj9989
• 发表日期: 2024-04-12
• 关键词: auxiliary basis-sets; high-performance; building-block; bisphenol-a; transesterification; implementation; mechanism; diacetal; accuracy; networks

摘要

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 degrees C, and a storage modulus at 25 degrees 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.