热聚氨泡的循环再加工 热聚氨泡的循环再加工
Subeen Kim1, Kelvin Li1, Alaaeddin Alsbaiee2
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
Advanced materials (Deerfield Beach, Fla.)
|August 7, 2023
概括
现在可以通过一种新的再泡工艺回收热聚氨 (PU) 泡. 该方法允许从废弃物中创建新的PU泡,保持它们的原始特性和结构.
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:
- 耐热聚氨 (PU) 泡被广泛使用,但由于其交叉连接结构,很难回收.
- 传统的回收方法,如炼再加工,对于热PU来说是不可行的.
- 以前的PU回收尝试产生了具有有限商业价值的固体薄膜.
研究的目的:
- 开发一种再加工和再泡热性PU泡的方法.
- 为了使新的PU泡产品能够从回收材料中制造出来.
- 调查可扩展的PU泡回收工艺的可行性.
主要方法:
- 使用碳酸盐交换催化剂,将热PU泡转化为共价适应网络 (CAN).
- 一台双螺杆挤出机用于同时进行再加工和再泡,并结合了为细胞生长提供气体的生产.
- 对再加工的PU泡挤出材料进行了化学,热和结构分析.
- 再循环泡的压缩性能与原始泡进行了比较.
主要成果:
- 一种新的泡对泡挤出工艺成功地开发出了耐热PU.
- 再发泡过程产生了可控制,连续和均的泡结构.
- 生产了低密度的PU泡,模拟了注塑成型.
- 再加工的PU泡保持了微观结构和化学完整性,与非合成泡相美.
结论:
- 热阻PU泡可以使用开发的双螺丝挤出方法有效地回收和重新发泡.
- 这种回收策略保持了PU泡的基本特性.
- 该过程显示了可扩展性和适用于各种PU泡成分的承诺.
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