通过将聚合物与微生物产生的聚[(R) - 乳酸盐-协同- (R) - 3 - 基酸盐]共聚物质混合,对聚[(乳酸盐) 进行修改
Yusuke Imai1, Yuichi Tominaga1, Shinji Tanaka2
1Multi-Material Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 4-205, Sakurazaka, Moriyama-ku, Nagoya, Aichi 463-8560, Japan.
International journal of biological macromolecules
|March 20, 2024
概括
混合微生物产生的聚[(R) -乳酸盐-co-(R) -3-基酸盐] (LAHB) 与聚乳酸盐 (PLA) 增强了PLA.
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
- 生物技术是生物技术.
背景情况:
- 聚乳酸 (PLA) 是一种具有有限机械性能的可生物降解聚合物.
- 微生物产生的聚[(R) - 乳酸盐-co-(R) - 3 - 基酸盐] (LAHB) 共聚物具有修饰性能的潜力.
- 了解聚合物混合物特性对于开发先进的可生物降解材料至关重要.
研究的目的:
- 研究将LAHB与PLA混合对其机械,热和生物降解性能的影响.
- 为了确定最佳的LAHB成分以提高PLA的性能.
- 描述PLA/LAHB混合物的形态和可混合性.
主要方法:
- 聚合物混合PLA和LAHB共聚物的聚合物.
- 机械测试,包括拉伸延伸测量.
- 使用温度调节的微分扫描热量计 (DSC) 进行热量分析.
- 动态机械分析 (DMA).
- 通过扫描探针显微镜 (SPM),小角度X射线散射 (SAXS) 和固态核磁共振 (NMR) 的形态特征.
- 在海水中使用生物氧需求 (BOD) 试验进行生物降解评估.
主要成果:
- 将LAHB与PLA混合,在LAHB的20-30%重量时,PLA的拉伸延长率大大提高了250%以上.
- PLA和LAHB是不混合的,但表现出相互的塑化,表明相互作用.
- 混合物形成了一个具有纳米尺度 (20纳米) 特征的双相结构,并且保持光学透明.
- 在海水中测试的聚合物混合物中,增强了PLA的生物降解.
结论:
- 将LAHB与PLA的聚合物混合为增强PLA的机械性能和生物降解性提供了一个可行的策略.
- 纳米尺度形态和相互塑化有助于提高PLA/LAHB混合物的性能.
- 这些光学透明,增强的可生物降解聚合物混合物对可持续材料应用具有前景.
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