聚乙烯碳酸对聚乳酸基复合膜的性能的影响
Kang Chen1, Xinyu Zhang1, Zanru Wang2
1Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China.
International journal of molecular sciences
|May 11, 2024
概括
在聚乳酸 (PLA) 薄膜中添加聚烯碳酸 (PPC) 提高了机械强度和屏障性能. 这些PLA/PPC复合膜还显示出更好的生物降解性和细菌抑制,使它们适合食品包装.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 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,具有包装应用的潜力.
- 提高PLA的性能,如机械强度和可降解性,对于更广泛的采用至关重要.
- 加入添加剂可以修改PLA的性能特征.
研究的目的:
- 研究将聚乙烯碳酸盐 (PPC) 添加到基于PLA的复合膜的效果.
- 评估PPC对机械,屏障,热,可降解性和抗菌性能的影响.
- 探索开发先进的基于PLA的可生物降解分层材料,用于食品包装的战略.
主要方法:
- 使用融和热压成型制备PLA/PPC复合薄膜.
- 分析机械性能 (拉力强度).
- 测量水蒸气和氧气传输速率.
- 热分析 (冷结晶温度).热分析 (冷结晶温度).
- 评估堆肥的可降解性和细菌抑制.
主要成果:
- 30%的PPC添加增加了19.68%的拉伸强度和改善的屏障特性 (水蒸气和氧气传输分别减少了14.43%和18.31%).
- 加入PPC增强了PLA的结晶能力,将冷结晶温度从96.9°C提高到104.8°C.
- 复合膜的降解速度显著增加 (49.85%和46.22%在40天和80天内更快),并且表现出最大抑制区为2.42厘米的细菌抑制.
结论:
- 聚乙烯碳酸) 有效地增强了聚乳酸薄膜的机械,屏障和热性能.
- 添加PPC显著提高了堆肥的可降解性,并赋予基于PLA的复合材料抗菌性质.
- 在食品包装应用中,PLA/PPC复合膜为开发可持续的可生物降解层面材料提供了一个有前途的战略.
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