生物质衍生的环氧胺热固体的闭环可回收性
Xianyuan Wu1,2, Peter Hartmann2, Dimitri Berne3
1Stratingh Institute for Chemistry, University of Groningen, 9747AG Groningen, Netherlands.
Science (New York, N.Y.)
|April 11, 2024
概括
这项研究引入了一种新的可回收环氧树脂,该树脂来自纤维素. 这种材料具有出色的性能,可以通过化学回收,重复使用关键部件.
科学领域:
- 聚合物化学
- 材料科学
- 可持续的化学
背景情况:
- 环氧树脂热被广泛使用,但由于可回收性差和环境污染而面临挑战.
- 有必要开发本质上可回收的ERT,特别是那些来自可再生资源的ERT.
研究的目的:
- 合成并证明完全由纤维素衍生的环氧树脂的闭环循环回收.
- 评估新型环氧树脂系统的热力学性能和可回收性.
主要方法:
- 使用由纤维素素衍生的前体合成环氧树脂 (DGF/MBCA):2,5-碳酸的二甲基 (DMFD),4,4'-甲基二 (MBCA) 和糖醇.
- 热力学特性,包括玻璃过渡温度 (Tg) 和储存模量.
- 对DMFD再生的无催化剂甲醇化和MBCA和糖醇回收的乙醇化进行研究.
主要成果:
- 合成的DGF/MBCA表现出优异的热力学性能,Tg为170°C,储存模量为1.2GPa,温度为25°C.
- 环氧树脂经过有效的甲醇化,没有催化剂再生90%的原始DMFD.
- 随后的乙解允许二胺MBCA和糖醇的重制,从而实现闭环循环循环.
结论:
- 一种新型,完全由纤维素衍生而成的具有高性能和固有的可回收性的环氧树脂已成功合成.
- 开发的材料为传统的ERT提供了一个可持续的替代品,解决了与废弃物相关的环境问题.
- 经过验证的闭环回收过程,使关键的单体再生,为复合材料中更可持续的聚合物应用铺平了道路.
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