来自聚氨的糖解的多聚的除化
Riccardo Donadini1, Carlo Boaretti1, Luca Scopel1
1Department of Industrial Engineering, University of Padova, via Marzolo 9, Padova, 35131, Italy.
Chemistry (Weinheim an der Bergstrasse, Germany)
|October 16, 2023
概括
这项研究通过测试除剂来解决回收聚氨 (PU) 中的甲基氨 (MDA) 污染问题. 2-乙基基乙烯 (2-EHGE) 有效地降低了MDA,使得高性能回收PU泡的生产成为可能.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 通过糖溶解回收聚氨 (PU),产生甲基氨 (MDA),这是一个危险的副产品.
- 污染的MDA复杂的处理,运输和标签的回收聚合物,阻碍循环经济的努力.
- MDA的存在与PU废弃物脱聚合过程中的水解和热解有关.
研究的目的:
- 研究各种除剂 (DAs) 在从糖化PU中去除MDA的有效性.
- 分析有关反应时间和催化剂度的MDA形成动力学.
- 评估用DA处理的回收聚合物的性能,用于合成新的PU刚性泡.
主要方法:
- 用不同的催化剂 (酸) 度和反应时间进行PU废料的糖解.
- 用不同的除剂处理含有MDA的聚合物,包括2-乙基乙烯 (2-EHGE) 和乙二氧化 (Ac2O).
- 从经过处理的回收聚合物中合成和表征 (机械和热性能) 刚性PU泡.
主要成果:
- 随着PU脱聚合程度和催化剂度,MDA的形成线性增加.
- 2-EHGE和Ac2O显著减少了MDA,在30分钟内满足标签要求.
- 从Ac2O处理的多聚合物合成的泡具有较差的机械稳定性,而2-EHGE处理的多聚合物产生了具有增强机械性能和稳定的导热性的泡.
结论:
- 2-EHGE是一种有前途的除剂,可以有效地从回收的PU聚合物中去除MDA.
- 2-EHGE促进了生产高质量的回收PU泡,提高了机械性能.
- 解决MDA污染对于推进PU回收和实现闭环系统至关重要.
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