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基于纤维素的生物塑料对当前LDPE回收的影响

Giovanni Gadaleta¹, Sabino De Gisi¹, Andrea Sorrentino²

¹Department of Civil, Environmental, Land, Building Engineering and Chemistry (DICATECh), Politecnico di Bari, Via E. Orabona n. 4, I-70125 Bari, Italy.

Materials (Basel, Switzerland)

|July 14, 2023

概括

在低密度聚乙烯 (LDPE) 循环流中添加用三酸盐 (CAT) 塑化的纤维素酸盐会损害机械循环. 这种生物塑料混合物对LDPE的可加工性产生负面影响,并降低了回收材料的质量,需要单独的生物塑料废物流.

科学领域:

材料科学材料科学材料科学
聚合物回收利用聚合物回收利用
可持续的塑料可持续的塑料

背景情况:

生物塑料越来越多地出现在城市固体废物中,通常与传统的聚合物混合,如低密度聚乙烯 (LDPE).
了解生物塑料污染对传统塑料回收的影响,对于有效的废物管理至关重要.

研究的目的:

评估用三酸盐 (CAT) 塑化纤维素酸盐对LDPE机械回收的作用.
为了确定CAT污染是否会在回收过程中影响LDPE的化学,热,学和机械性能.

主要方法:

制备LDPE-CAT混合物与不同的CAT含量 (0-10%按重量) 通过融挤出.
使用扫描电子显微镜,福里埃变换红外光谱,热分析 (TGA,DSC),学测量和拉伸测试进行分析.

主要成果:

存在CAT并没有显著改变LDPE的化学,热或质性质.
在典型的加工条件下没有观察到LDPE的显著降解,加上CAT.
CAT对LDPE的可加工性和机械性能产生了负面影响,降低了回收材料的质量.

结论:

诸如CAT之类的基于纤维素的生物塑料不应纳入LDPE回收流.
建议为生物塑料提供专门的分类流,以保持回收LDPE的质量.

关键词:

在LDPE中使用LDPE.生物塑料生物塑料纤维素乙酸盐的使用情况机械回收机械回收机械回收塑料废弃物塑料废弃物

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