机器介导环开聚合乙烯铜酸盐从纤维素纳米纤维在反应挤出反应中
Angelica Avella1, Abdolrahim Rafi2, Luca Deiana2
1Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, Göteborg 41258, Sweden.
概括
这项研究引入了一种创新的方法,使用纤维素纳米纤维和有机催化剂制造可生物降解的聚乙烯铜酸盐 (PEB) 纳米复合材料. 该过程提高了材料的性能,并为生命周期结束管理提供了一个循环解决方案.
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
- 生物技术是生物技术.
背景情况:
- 乙烯铜酸盐是一种可再生的麦克罗拉克,可以聚合成可生物降解的聚乙烯铜酸盐 (PEB).
- 有机金属催化剂产生高摩尔质量PEB,但带来了环境和成本问题.
- 无金属有机催化剂为聚合物合成提供了一个可持续的替代方案.
研究的目的:
- 开发一种新的纤维素纳米纤维 (CNF) /PEB纳米复合材料制造工艺.
- 使用有机催化和反应挤出 (REx) 进行无溶剂的现场聚合.
- 研究CNF表面拓化学对纳米复合材料性能的影响.
主要方法:
- 使用1,5,7-triazabicyclo[4.4.0]dec-5-ene作为有机催化剂,对乙烯酸盐进行环开聚合 (ROP).
- 无溶剂反应挤出 (REx) 工艺在130°C的微组合器中进行.
- 在现场聚合,使用纯净或乳酸化CNF (LACNF) 作为启动剂.
主要成果:
- 在30分钟内实现了高单体转化 (>98%) 和9kDa的摩尔质量,使用两种CNF类型.
- 由于有效的纳米纤维分散,证明了PEB矩阵的强化和弹性增加.
- 证实了PEB和CNF/PEB纳米复合材料的机械可回收性,其中乳酸部分诱导了降解.
结论:
- 开发了一种可持续的方法,通过有机催化和REx生产PEB纳米复合材料.
- CNF有效地增强PEB,通过从聚合物中接种增强其机械性能.
- 开发的纳米复合材料提供了一个循环经济解决方案,具有受控降解的潜力.
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