title: Mimicking the cell membrane: bio-inspired simultaneous functions with monovalent anion selectivity and antifouling properties of anion exchange membrane.
abstract: A new bio-inspired method was applied in this study to simultaneously improve the monovalent anion selectivity and antifouling properties of anion exchange membranes (AEMs). Three-layer architecture was developed by deposition of polydopamine (PDA) and electro-deposition of N-O-sulfonic acid benzyl chitosan (NSBC). The innermost and outermost layers were PDA with different deposition time. The middle layer was prepared by NSBC. Fourier transform infrared spectroscopy and scanning electron microscopy confirmed that PDA and NSBC were successfully modified on the surfaces of AEMs. The contact angle of the membranes indicated an improved hydrophilicity of the modified membranes. A series of electrodialysis experiments in which Cl-/SO42-separation was studied, demonstrating the monovalent anion selectivity of the samples. The Cl-/SO42-permselectivity of the modified membranes can reach up to 2.20, higher than that of the commercial membrane (only 0.78) during 90 minutes in electrodialysis (ED). The increase value of the resistance of the membranes was also measured to evaluate the antifouling properties. Sodium dodecyl benzene sulfonate (SDBS) was used as the fouling material in the ED process and the membrane area resistance of modified membrane increase value of was only 0.08 Ωcm230 minutes later.
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Huimin
authors.initials: H
authors.lastname: Liu
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Kaini
authors.initials: K
authors.lastname: Tang
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Jiefeng
authors.initials: J
authors.lastname: Pan
authors.affiliation: Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
authors.forename: Bart Van
authors.initials: BV
authors.lastname: der Bruggen
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Jiangnan
authors.initials: J
authors.lastname: Shen
authors.affiliation: Center for Membrane Separation and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
authors.forename: Congjie
authors.initials: C
authors.lastname: Gao
mesh_terms: D057927:Hydrophobic and Hydrophilic Interactions; D007211:Indoles / Q000737:chemistry*; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*
chemical_list: D007211:Indoles; D008567:Membranes, Artificial; D011108:Polymers; C568283:polydopamine