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在食品废弃物的受控堆肥下,结构修改的聚乙烯的降解

Elena Trofimchuk^1,2, Valeria Ostrikova³, Olga Ivanova¹

¹Department of Chemistry, Moscow State University, Moscow 119991, Russia.

|October 14, 2023

概括

在工业堆肥条件下,聚酸 (PLA) 薄膜在一个月内降解. 这一过程减少了分子重量并增加了结晶性,证实了堆肥作为PLA塑料处理的可行解决方案.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
聚合物化学聚合物化学

背景情况:

塑料废物对环境构成重大挑战.
聚酸 (PLA) 是一种可生物降解的聚合物,越来越多地被用作传统塑料的替代品.
有效的PLA生命周期终止管理策略至关重要.

研究的目的:

在受控的工业堆肥条件下,研究聚酸 (PLA) 薄膜的降解行为.
分析堆肥对PLA分子量和结晶性的影响.
评估工业堆肥对PLA废物管理的可行性.

主要方法:

使用模拟的工业堆肥基板进行受控堆肥实验.
在一个月的时间内监测PLA薄膜的降解.
对数值平均分子量 (M_n) 和结晶度的变化进行分析.

主要成果:

在模拟的工业堆肥下,聚酸 (PLA) 薄膜在一个月内显著降解.
在21天后,M_n降至大约4kDa,结晶度增加到大约70%,无论最初的薄膜结构如何.
添加注射剂在一周内加速了PLA的降解,主要是通过非生物水解.

结论:

工业堆肥是一种有效的方法来降解聚酸 (PLA) 薄膜.
降解过程导致分子重量大幅减少和结晶性增加.
堆肥为管理PLA塑料废物提供了一个有前途的解决方案,为循环经济做出贡献.

关键词:

生物降解生物降解堆肥堆肥堆肥是一种凝透色谱学凝透色谱学水解性降解降解的降解方式聚酸是一种多酸.结构结构结构结构

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