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从废弃的聚织品中回收的Bis ((Hydroxyethylterephthalate) 的高效脱色,采用疏水性深性溶剂
Zhanpeng Wang1, Yumei Tang1, Lin Zhu1
1College of Environmental Science and Engineering, Beijing University of Technology, 100 Ping Le Yuan, Chaoyang District, Beijing, 100124, China.
ChemSusChem
|February 28, 2025
概括
深度环氧化溶剂有效地从PET糖解溶液中去除染料,使高质量的回收PET (rPET) 生产成为可能. 这种方法增强了彩色织品的闭环回收.
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:
- 糖溶解是闭环PET织品回收的关键技术.
- 在PET织品中的染料阻碍了脱聚合和再聚合过程,损害了回收PET的质量.
- 有效的染料去除对于高效和高质量的PET回收至关重要.
研究的目的:
- 调查使用疏水性深溶剂 (DES) 来从PET糖解溶液中去除染料.
- 优化一个DES系统,以高效地去色 bis (基乙基甲酸盐) (BHET).
- 建立一个关闭循环回收彩色PET织品的战略.
主要方法:
- 使用疏水性DES,特别是薄荷和油酸混合物 (Men:OleA),作为提取剂.
- 在模拟和实际染色的PET糖解溶液上测试脱色效率.
- 使用伪二阶模型分析提取动力学.
- 描述和量子化学计算,以了解脱色机制.
主要成果:
- 一个优化的Men:OleA DES实现了BHET与Disperse Blue 56合的89.4%的脱色.
- DES成功地去色了九种不同颜色的PET织物糖解溶液,在二次提取后达到98.2%.
- 在多个回收周期中,DES表现一致.
- 脱色是由诸如结和范德瓦尔斯力等物理相互作用驱动的.
结论:
- 疏水性DES,特别是Men:OleA,可以有效地从PET糖解溶液中去除染料.
- 这种方法有助于从彩色织品生产高质量的回收PET (rPET).
- 这项研究为彩色PET材料的闭环回收提供了一个可行的策略.
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