通过机械训练来加强面向的聚 (L-乳酸) 单丝
Yan Zhang1, Xuechun Dong1, Chen Zhang1
1School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China.
International journal of biological macromolecules
|February 28, 2024
概括
使用爬行方式进行机械训练显著增强了Poly (L-乳酸) (PLLA) 单纤维. 这一过程使总延长率提高了67%和储存模块提高了20%以上,以获得更好的生物医学应用.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物工程 聚合物工程
- 医疗器械开发 医疗器械开发
背景情况:
- 聚合物材料,特别是聚 (L-乳酸) (PLLA),由于生物相容性,对于可生物降解的医疗器械如支架至关重要.
- PLLA是一种粘弹性材料,容易在持续的应力下爬行,从而影响其机械性能.
- 提高PLLA机械性能对于先进的生物医学应用至关重要.
研究的目的:
- 调查使用爬行现象来改善Poly (L-乳酸) (PLLA) 单丝纤维的机械性能.
- 探索用于PLLA增强的受控机械训练方法.
- 评估爬行引起的结构变化对PLLA机械属性的影响.
主要方法:
- 将高度定向的PLLA单丝进行受控的,持续的力拉伸 (爬行).
- 通过拉力测试和动态机械分析评估机械特性.
- 使用原子力显微镜 (AFM) 和扫描电子显微镜 (SEM) 分析微观结构变化.
主要成果:
- 在机械训练后,总延长率增加了67%,存储模块增加了20%以上.
- 显微镜分析显示了增强的分子链间距和空洞形成.
- 机械改进与分子链在无形区域的解和排序有关.
结论:
- 控制的爬行诱导机械训练是一种有前途的策略,可以增强PLLA单丝纤维的特性.
- 提高PLLA机械性能可以有利于生物降解医疗器械的开发.
- 这种方法为优化基于聚合物的生物医学工程解决方案提供了一条途径.
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