可持续塑料:生物基塑化剂对PLA结晶动力学的影响
David Alberto D'Amico1,2, Liliana Beatriz Manfredi1,2, Norma Esther Marcovich1,2
1Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Universidad Nacional de Mar del Plata-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata C/7600, Argentina.
Polymers
|November 13, 2025
概括
来自再生日油的新型生物可塑剂有效地修改了聚 (乳酸) (PLA) 结晶动力学. 这种可持续的替代品在不改变其晶体结构的情况下增强了PLA的特性,为先进的聚合物应用提供了潜力.
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
- 可持续化学 可持续化学
背景情况:
- 聚 (乳酸) (PLA) 是一种可生物降解的聚合物,在各种领域都有潜在的应用.
- 基于石油的增塑剂引发了环境问题,推动了对可持续替代品的需求.
- 价值化食品工业的副产品,如使用的向日油,提供了一个循环经济的方法.
研究的目的:
- 为了研究生物基塑化剂从使用的向日油对PLA结晶的影响.
- 为了比较生物可塑剂与常规可塑剂的效果,tributyrin.
- 评估生物可塑剂在为可持续材料解决方案量身定制PLA性能方面的潜力.
主要方法:
- 制备有不同度 (5%,10%,15%) 的生物基和基化剂的PLA薄膜.
- 使用差分扫描热度计 (DSC),极化光学显微镜 (POM) 和X射线衍射 (XRD) 的表征.
- 使用Avrami模型,Lauritzen-Hoffman理论和异构转换方法分析结晶运动.
主要成果:
- 塑化降低了PLA的玻璃过渡温度,而分氨酸显示出更显著的效果.
- XRD证实,PLA的晶体结构没有受到任何可塑剂的改变.
- POM表示,生物可塑剂促进了较大,较少的球状物相比tributyrin,这表明不同的核和生长动态.
- 动力分析显示,在塑性化PLA中,结晶率增加,激活能量减少,核化机制基本不受影响.
结论:
- 从使用过的日油中提取的生物基塑化剂有效调节了PLA结晶动力学.
- 这种可持续的增塑剂为传统选择提供了一个可行的替代方案,促进废物流的使用.
- 这些发现支持开发高性能,可持续的基于PLA的材料,用于3D打印等应用.
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