具有增强的机械和耐热性能的生物基聚酸泡,通过添加D-酸来促进立体复合体结晶而获得
Yao Wang1, Fangfang Zou1, Meijiang Lin1
1College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
International journal of biological macromolecules
|March 16, 2024
概括
这项研究将D-sorbitol (DS) 引入聚乳酸 (PLA) 混合物中,通过立体复杂晶体形成显著提高生物基PLA泡的机械性能和耐热性. 这项创新为高性能可生物降解材料提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 可持续材料 可持续材料
背景情况:
- 聚乳酸 (PLA) 泡对于可持续发展至关重要,因为它们是生物基的和可生物降解的.
- 提高PLA泡的机械性能和耐热性对于更广泛的应用是必不可少的.
- 在PLA中的立体复合 (SC) 晶体提供了更好的热和机械性能.
研究的目的:
- 为了研究D-醇 (DS) 对多样性乳酸 (PLLA) /多样性乳酸 (PDLA) 混合物中立体复合体 (SC) 晶体的形成的影响.
- 为了改善生物基PLA泡的发泡行为,机械性能和耐热性.
- 为制备高性能,可生物降解的PLA泡提供可行的策略.
主要方法:
- 在PLLA/PDLA混合物中引入D-醇 (DS).
- 对立体复合体 (SC) 晶体形成和结晶性的分析.
- 评估发泡行为,机械性能 (压缩模量) 和耐热性 (维卡特软化温度).
- 应用一个回火工艺,以进一步增强性能.
主要成果:
- D-sorbitol (DS) 通过增强PLLA和PDLA链之间的键,有效地促进了SC晶体的形成和结晶性.
- 与纯PLLA泡相比,PLLA/PDLA/DS混合泡的压缩模量增加了854%,Vicat软化温度增加了16%.
- 化进一步提高了开发的PLA泡的压缩和耐热性.
结论:
- D-sorbitol是一种高效的添加剂,可促进PLA混合物中SC晶体的形成,从而提高泡的性能.
- 开发的方法为生产具有卓越机械和热性能的生物基和可生物降解PLA泡提供了一条可行的途径.
- 这项研究有助于推进环境友好型应用的可持续材料.
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