用离子印记膜分离稀土:非溶剂和溶剂蒸发诱导相位分离之间的比较
Jiali Chen1, Ting Wang1, Yumiao Zhang1
1Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China.
Langmuir : the ACS journal of surfaces and colloids
|February 24, 2026
概括
具有离子印记聚合物的溶剂蒸发诱导相位分离膜显示出优越的稀土分离性能. 这些膜为实际应用提供了增强的选择性和良好的再生能力.
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.
- 分离科学 分离科学
背景情况:
- 使用膜分离相邻的稀土离子是很困难的,因为在结构控制和选择性方面的挑战.
- 开发先进的膜对于有效的稀土元素回收和净化至关重要.
研究的目的:
- 为了比较非溶剂诱导相分离 (NIPS) 和溶剂蒸发诱导相分离 (SEIPS) 方法,用于准备用于稀土分离的聚合物膜.
- 研究离子印记聚合物 (IIP) 对膜选择性和性能的影响.
主要方法:
- 使用NIPS (N-IIMs) 和SEIPS (S-IIMs) 制造离子印记膜 (IIMs).
- 膜结构的特征,水友性和孔隙性质.
- 对稀土离子分离的膜性能进行评估,重点关注选择性和透性.
主要成果:
- N-IIM表现出更高的水友性和更松散,更多孔的结构.
- S-IIM 展示了一个更紧,更光滑,更薄的结构.
- 具有20 wt% IIP的S-IIM通过模板导向的"地点匹配"机制实现了高的Er(III) / Y(III) 分离因子 (β(Er/Y) = 2.72).
- 膜在5个循环后显示出90%以上的性能保留,这表明了良好的重复使用性.
结论:
- 在结合IIP时,SEIPS比NIPS更适合制备有效的稀土分离膜.
- 开发的S-IIM由于其增强的性能和稳定性,具有选择性稀土分离的巨大潜力.
- 未来的工作应该专注于宏观制造和复杂稀土混合物的应用.
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