通过UV介导轻松制造一个坚固的,完全可再生的,可控制的可生物降解的聚 (乳酸) 基共价适应性网络
Xiaobo Wei1, Xiutao Zhang1, Tianyu Chen1
1The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
ACS macro letters
|August 12, 2024
概括
研究人员开发了一种可持续的,基于生物的聚合物网络,使用聚乳酸和二硫化键. 这种适应性强的材料是可回收的,可生物降解的,并表现出形状记忆,提供多功能应用.
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
- 生物材料工程 生物材料工程
背景情况:
- 开发具有可调节性质的可持续聚合物对于减少环境影响至关重要.
- 联适应性网络 (CAN) 提供了可回收和自我修复等动态特性.
- 生物基聚合物如聚乳酸 (PLA) 具有吸引力,但往往缺乏强大的动态特性.
研究的目的:
- 创建一个完全基于生物的共价适应性网络 (CAN),增强可回收性,生物相容性和可控制的生物降解性.
- 为了研究使用dithiolane环用于动态二硫化物键形成的PLA的光交联.
- 探索新CAN的材料特性和潜在应用.
主要方法:
- 通过施特利赫用硫酸 (TA) 的斯特格利希化对低分子量聚乳酸 (PLA) 进行修改,并以末端的1,2-二甲基乙烯环进行修改.
- 改性PLA通过dithiolane环的光诱导环开聚合的光交联,形成动态的二硫化物键.
- 描述CAN的机械性能,紫外线阻断,热稳定性,生物相容性,可回收性,生物降解性和形状记忆行为.
主要成果:
- 制造了一个强大的,透明的,生物基的CAN,具有UV阻 (<320nm),高抗拉强度 (~39MPa) 和在80°C时的优异尺寸稳定性.
- 通过热压和氧化还原过程,CAN证明了有效的可回收性,以及受控的生物降解性.
- 该材料表现出可重新配置的形状记忆特性,具有快速恢复和良好的生物相容性.
结论:
- 一种简单的光交叉链接方法可以从生物基聚合物 (乳酸) 产生一个多功能,可持续的聚合物网络.
- 动态二硫化物键赋予可回收性,可控制的生物降解性和形状记忆能力.
- 这种新的CAN具有在可持续包装,涂料和生物医疗设备中应用的巨大潜力.
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