高性能单价选择性阴离子交换膜与离子交叉连接的侧链:酸性群体的影响
Peng-Xu Yang1,2, Jing Wang1,2, Hui-Li Liu1,2
1Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
ACS applied materials & interfaces
|June 28, 2024
概括
新的聚合物膜模仿细胞通道进行选择性离子运输. 调节酸性群体增强了阴离子流和选择性,在分离等应用中表现优于商业膜.
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
- 分离科学 分离科学
背景情况:
- 细胞膜蛋白通道调节基于电荷的离子运输.
- 开发具有类似选择性的合成膜对于分离技术至关重要.
- 基于聚乙烯 (PEEK) 的聚合物为膜设计提供了强大的平台.
研究的目的:
- 设计和合成由生物通道启发的新型单价阴离子选择性膜 (MCEMs).
- 研究不同酸性群体对离子交联,纳米相分离和通道形成的影响.
- 优化MCEM以实现高阴离子流和选择性,特别是用于Li+分离.
主要方法:
- 用四级和酸性群体 (硫酸,碳酸,基) 合成基于PEEK的聚合物.
- 通过酸性和四级基之间的离子交联来制备MCEM.
- 膜结构的特征,机械性能,阴离子流和选择性 (Li+/Mg2+).
主要成果:
- 离子交联诱导纳米相分离并形成有效的离子通道,产生出色的机械性能和高阴离子流.
- 离子流随着酸性群体的电离增加,而选择性则取决于功能组-离子亲和力.
- 含有碳基的MCEM表现出优异的选择性 (9.01对于Li+/Mg2+),超过商业CIMS膜.
结论:
- 稳定的MCEM可以通过使用离子交联聚合物的简单工艺来制备.
- 调整酸性群体的类型和电离度提供了一种有效的策略,可以提高离子流和选择性.
- 这些新型MCEM显示出先进的单价离子离子分离应用的巨大潜力.
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