Fundamental salt and water transport properties in directly copolymerized disulfonated poly(arylene ether sulfone) random copolymers |
| |
Authors: | Wei Xie Ho Bum Park Chang Hyun Lee |
| |
Affiliation: | a University of Texas at Austin, Center for Energy and Environmental Resources, 10100 Burnet Road, Building 133, Austin, TX 78758, United States b WCU Department of Energy Engineering, Hanyang University, Seoul 133-791, South Korea c Virginia Polytechnic Institute and State University, Macromolecules and Interfaces Institute, Blacksburg, VA 24061, United States |
| |
Abstract: | Water and sodium chloride solubility, diffusivity and permeability in disulfonated poly(arylene ether sulfone) (BPS) copolymers were measured for both acid and salt form samples at sulfonation levels from 20 to 40 mol percent. The hydrophilicity of these materials, based on water uptake, increased significantly as sulfonation level increased. The water permeability of BPS materials in both the salt and acid forms increases more than one order of magnitude as sulfonation level increases from 20% to 40%, while NaCl permeability increases by two orders of magnitude. The water and salt diffusivity and permeability were correlated with water uptake, consistent with expectations from free volume theory. In addition, a tradeoff was observed between water/salt solubility, diffusivity, and permeability selectivity and water solubility, diffusivity and permeability, respectively. This finding suggests a water/salt permeability/selectivity tradeoff, similar to that operative in gas separation polymers, in this family of polymers. |
| |
Keywords: | Disulfonated polysulfone Transport properties Desalination |
本文献已被 ScienceDirect 等数据库收录! |
|