混合织废弃物的化学回收
Erha Andini1,2, Pooja Bhalode3, Evan Gantert1
1Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
Science advances
|July 3, 2024
概括
这项研究提出了一种用于混合织废物的新型化学回收方法,通过微波辅助糖解将聚和斯潘德克斯转化为单体. 该过程有效地分离棉花和尼龙,为织品回收利用提供了可持续的解决方案.
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.
- 可持续化学 可持续化学
背景情况:
- 全球只有不到0.5%的消费后织废物被回收.
- 织品中的混合纤维和污染物阻碍了传统的机械回收.
- 焚烧和垃圾填埋是织废物的主要处置途径.
研究的目的:
- 为消费后混合织废物开发一个高效的化学回收工艺.
- 用于将聚和松竹组件脱聚合成单体.
- 分离和评估回收的棉花和尼龙的质量.
主要方法:
- 微波辅助糖解使用ZnO催化剂进行快速脱聚合.
- 溶剂溶解用于从去聚合混合物中分离棉花和尼龙.
- 所有回收元件的全面材料特性.
主要成果:
- 在15分钟内成功将聚和松脱聚合成单体.
- 通过溶剂溶解实现了棉花和尼龙的有效分离.
- 评估回收材料的质量,以便有可能重复使用.
结论:
- 开发的化学回收工艺为织废物利用提供了一个可行的途径.
- 这种方法解决了混合纤维在织回收过程中所带来的挑战.
- 技术经济分析表明了可持续织循环的过程的潜在经济可行性.
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