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Updated: Jan 12, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Acid-induced structural regulation of spiropyran-modified mixed matrix membranes for enhanced CO2/CH4 separation
Zhiqing Xu1, Yaxu He1, Qiujian Xie1
1Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China. reynardtang@csu.edu.cn.
Abstract:
This study presents a biomimetic, acid-responsive membrane developed by blending PIM-1 with a spiropyran-based polymer (TSP-1) to enhance CO2 separation performance. TSP-1 optimizes the pore structure of PIM-1, and the acid treatment induces a change in the pore microenvironment and polarity, resulting in a CO2 permeability of 13 659 Barrer and a CO2/CH4 selectivity of 36.5, surpassing the 2019 Robeson upper bound.

