生物基质可塑剂的可塑化机制包括聚乙烯糖醇二氧化乙乙-丁酸盐,其长链和短链均在聚乙烯乳酸上
Shiyan Sun1, Yunxuan Weng1, Yu Han1
1Department of Materials Science and Engineering, Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Beijing 100048, China.
International journal of biological macromolecules
|July 18, 2024
概括
新的塑化剂通过增加破裂时的延长来增强聚乳酸 (PLA) 的灵活性. 这些从酸和其他剂中合成的新型化合物减少了增塑剂的迁移,并保持了材料的强度,以改善可生物降解膜的生产.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 可持续材料 可持续材料
背景情况:
- 聚乳酸 (PLA) 是一种可生物降解的聚合物,通常被塑化以提高薄膜应用的灵活性.
- 像Tributyl Citrate (TBC) 这样的传统塑化剂可以从PLA矩阵中迁移,从而降低材料强度和性能.
- 需要有效的塑化剂来增强PLA的灵活性,而不损害其机械完整性.
研究的目的:
- 为聚乳酸 (PLA) 合成新型塑化剂,提高灵活性和减少迁移.
- 调查塑化剂结构,特别是布틸基和环氧功能对PLA性能的影响.
- 与TBC相比,评估合成可塑剂的可塑化效率和机械性能.
主要方法:
- 三种新型增塑剂的合成:TE3,TE2B1和TE1B2通过将酸与n-butanol和poly (乙烯基甘醇) diglycidyl结合.
- 将合成的增塑剂纳入PLA矩阵,用于电影制作.
- 评估机械性能,包括破裂时的延长和抗拉强度,以及塑化剂迁移的评估.
主要成果:
- 合成的增塑剂,特别是TE1B2,显著改善了PLA在破碎时的延长.
- 具有环氧基的可塑化剂与PLA的相互作用增强,减少迁移并保持拉伸强度.
- 在15phr的TE1B2时,破裂时的延伸率增加到304%,拉伸强度为36.1MPa,优于TBC (242%的延伸,223MPa的拉伸强度).
结论:
- 基于酸衍生物的新型塑化剂有效地提高了PLA的灵活性.
- 在增塑剂中加入布틸基和环氧功能,提高了它们的兼容性,并减少了PLA的迁移.
- TE1B2作为PLA增塑剂表现出卓越的性能,为可生物降解薄膜应用提供了一个有前途的替代方案.
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