开发和机械表征环保的PLA/作物废弃物绿色复合材料
Karolina Ewelina Mazur1,2, Tomasz Wacław Witko2, Alicja Kośmider1,3
1Department of Materials Engineering, Faculty of Materials Engineering and Physics, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.
Materials (Basel, Switzerland)
|August 14, 2025
概括
可持续的聚乳酸 (PLA) 生物复合材料是使用食物废物填充物,如海和咖啡粉等,创建的. 这些材料显示出有前途的机械性能和耐腐蚀性,可用于环保应用.
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:
- 对于传统塑料的可持续替代品的需求日益增长.
- 需要有效地利用食品废弃物流.
- 聚乳酸 (PLA) 作为可生物降解的聚合物矩阵的潜力.
研究的目的:
- 使用各种食品废弃物衍生的填充剂制造和表征基于PLA的生物复合材料.
- 评估这些复合材料的机械性能和水解衰老行为.
- 评估填充剂类型和形态学对复合材料性能的影响.
主要方法:
- 将15%重量的海,蛋,核桃和消耗的咖啡粉填充剂纳入一个兼容的PLA矩阵.
- 机械测试:拉伸,曲和冲击强度.
- 使用扫描电子显微镜 (SEM) 进行形态分析.
- 过28天的水解衰老试验.
主要成果:
- 与海增强的PLA (PLA15S) 与整洁的PLA相比,拉伸强度增加了72%.
- 用咖啡粉增强的PLA (PLA15C) 显示出最佳的水解稳定性,在老化后保持约36%的抗拉强度.
- 核桃的复合材料明显降解,失去了超过98%的机械强度.
- 填料的物理化学性质和形态学极大地影响了强化和降解.
结论:
- 农业食品残留物可以有效地被利用成可生物降解的PLA复合材料.
- 海和咖啡粉填充剂提供平衡的机械性能和良好的老化稳定性.
- 这些生物复合材料适用于可持续包装和非负载结构应用.
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