从多层塑料包装废物中回收聚乙烯.
Anareth Cavuquila1, Luanna Maia1,2,3, Germano A Carreira4
1CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
Polymers
|March 14, 2026
概括
这项研究开发了一种基于二烯的溶解沉工艺,用于回收多层塑料包装废物 (MPPW). 优化的方法有效地回收适合回收的聚乙烯 (PE),解决了废物管理的重大挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 多层塑料包装废弃物 (MPPW) 由于其复杂的结构,造成了大量的废物管理挑战.
- 传统的回收方法受到聚合物组成和层结构的变化所阻碍,导致填埋或焚烧.
- 有效的MPPW回收对于减少环境污染和节约资源至关重要.
研究的目的:
- 开发和优化一种溶解沉工艺,从MPPW中回收聚乙烯 (PE).
- 确定最佳的操作条件,以最大限度地提高PE回收率和纯度.
- 评估开发的回收工艺的工业可扩展性.
主要方法:
- 使用烯作为MPPW溶解-沉的溶剂.
- 用实验设计 (DoE) 和响应表面方法 (RSM) 来优化流程.
- 研究了温度,溶解时间,溶剂与废物比率和速度的影响.
主要成果:
- 实现PE回收,重量低于5%的聚烯 (PP),符合回收质量标准.
- 确定温度是对溶解产量和聚合物纯度最有影响的参数.
- 在最佳条件 (100°C,30分钟,400rpm,15mL/g) 下,回收率为39.1%,重量为97.7%的PE和2.3%的PP.
结论:
- 基于二烯的溶解沉过程提供了一个有效的途径,用于从MPPW中恢复PE.
- 优化过程表明了使用标准单元操作进行工业规模实施的潜力.
- 这种方法为管理MPPW和促进塑料循环经济提供了可行的解决方案.
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