可生物降解和传统的塑料包装:比较聚胺酸和聚烯的生命周期环境影响
Harish K Jeswani1, Mitchell R Perry2, Michael P Shaver2
1Sustainable Industrial Systems, Department of Chemical Engineering, The University of Manchester, Manchester, UK.
The Science of the total environment
|August 17, 2023
概括
聚曼酸 (PMA) 为包装提供了一种可生物降解的替代品,但其生产目前对环境的影响比聚钢更高. 提高 (生物) 曼代尔酸和单体的合成对于PMA至关重要.
科学领域:
- 聚合物科学 聚合物科学
- 环境科学 环境科学
- 绿色化学 绿色化学
背景情况:
- 塑料包装废物对环境构成风险,需要生物可降解的替代品.
- 聚曼酸 (PMA) 是一种可生物降解的聚合物,具有包装应用的潜力.
- 酸生产的环境可持续性对于其可行性至关重要.
研究的目的:
- 通过两个单体路径估计和比较PMA生产的生命周期环境影响.
- 在实验室和商业规模使用ReCiPe方法评估影响.
- 确定影响PMA生产对环境足迹的关键因素.
主要方法:
- 使用5--1,3-二醇-4- (Ph-DOX) 和o-碳素化物 (OCA) 单体进行PMA生产的生命周期评估 (LCA).
- 在18个ReCiPe影响类别中进行评估.
- 对关键过程参数和扩展假设的灵敏度分析.
主要成果:
- 通过Ph-DOX路线生产的PMA显示影响明显低于OCA路线.
- 大规模PMA生产的影响是聚钢的五倍以上,主要是由于原材料和溶剂的使用.
- 生物甘油的生物转化用于生产曼德利酸可以大幅减少影响 (6-77%).
结论:
- 目前通过Ph-DOX和OCA生产的PMA生产途径在环境上并不优于聚烯.
- 需要在 (生物) 曼酸生产,单体合成和聚合过程中显著改进.
- 进一步的研究是必不可少的,以建立PMA作为一个真正可持续的包装材料.
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