灵活聚氨泡废料的机械化学回收,用于使用块增强挤出机量化替代聚
Lei Guo1,2, Fu Wang1, Hailin Chai1
1College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China.
Polymers
|June 27, 2024
概括
回收柔性聚氨泡 (F-PUF) 现在可以使用一种新的块挤出机. 这种方法可以产生用于替代聚的功能性粉末,从而使可持续的F-PUF应用成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 可持续制造 可持续制造 可持续制造
背景情况:
- 柔性聚氨泡 (F-PUF) 的回收是具有挑战性的,因为其高度交叉连接的结构.
- 开发有效的F-PUF回收方法对于减少废物和节约资源至关重要.
研究的目的:
- 开发F-PUF废料的机械回收方法.
- 为了生产具有活性基组的F-PUF粉末,用于新型泡生产.
- 为了评估包含回收材料的F-PUF泡的性能.
主要方法:
- 使用块增强的挤出机来增强剪切挤出和拉伸F-PUF废料.
- 在室温下通过多个挤出周期处理的F-PUF粉末.
- 描述了F-PUF粉末的粒子大小 (VMD) 和基数 (OHN).
- 发泡了新的F-PUF,用回收的粉末取代了10%重量的聚.
- 评估了产生的F-PUF的微观结构,化学结构和物理特性.
主要成果:
- 在三个挤出周期后,F-PUF粉末的体积平均直径 (VMD) 达到54μm.
- 由于机械化学作用,回收的粉末获得了19.51 mgKOH/g的 -OH数 (OHN).
- 使用10%重量回收粉末替代品的F-PUF泡显示出与原始F-PUF相比较的微观结构和化学结构.
- 保持了关键性能,如压缩设置 (2%),缩负荷偏移 (21.3 lbf),弹性 (43.4%),空气透度 (815.7 L/m2·s),拉力强度 (73.0 Kpa) 和撕裂强度 (2.3 N/cm).
结论:
- 块增强挤压方法有效地将F-PUF废料回收成功能性粉末.
- 回收的F-PUF粉末可以在不损害材料性能的情况下,在泡过程中定量取代聚.
- 这种回收方法显示出在可持续的F-PUF制造中工业应用的巨大潜力.
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