高分子量和浅色的二硫化物结合嵌入式聚合物:通过氧化反应触发的加速水解
Han Hu1, Qingyang Luan1,2, Jiayi Li3
1Key Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Biomacromolecules
|November 10, 2023
概括
研究人员使用融聚凝开发了基于二硫化物键的新型聚合物 (PBSDi),为先进的可生物降解包装材料实现高分子量和增强的热稳定性.
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
- 可持续的高分子.
背景情况:
- 双硫化物键提供了减少反应性,但由于热稳定性差,在化聚凝中存在挑战.
- 开发基于二硫化物键的聚合物需要在加工过程中克服固有的S-S键不稳定性.
研究的目的:
- 通过化聚凝合成基于二硫化物键的聚合物 (PBSDi),以提高热稳定性.
- 评估新型PBSDi材料的性能,可加工性和降解行为.
- 探索PBSDi作为高性能可生物降解包装材料的潜力.
主要方法:
- 化聚凝以合成聚丁酸-共二二 propionate (PBSDi).
- 分子重量,热稳定性 (T_d,5%),结晶性和片状厚度的表征.
- 机械和屏障性能测试与商业聚乙烯基酸盐-联合甲酸盐 (PBAT) 相比.
- 酶和水解降解研究,包括对H2O2氧化反应的反应.
- 计算分析 (福基函数,DFT) 和非共价相互作用分析,以了解降解机制.
主要成果:
- 成功合成了具有高分子量 (高达84.7kg/mol) 和良好的热稳定性 (T_d,5%>318°C) 的PBSDi.
- 与PBAT相比,PBSDi表现出良好的结晶性和优越的机械和屏障性能.
- 二硫化物键加速了酶降解,并在H2O2.2中氧化 (转化为硫/硫) 时显示了可调节的水解速率.
- 谷氨引发了快速的聚合物-至-寡合物降解,由分子重量下降证实.
结论:
- 通过化聚凝克服了基于二硫化物键的聚的热稳定性挑战.
- 开发了具有可调节降解的高性能,可化加工的生物降解聚烯 (PBSDi).
- 对于需要按需降解的先进生物降解包装应用,PBSDi显示出显著的前景.
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