title: Constructing a novel zwitterionic surface of PVDF membrane through the assembled chitosan and sodium alginate.
abstract: A novel zwitterionic surface of PVDF membrane with significantly improved antifouling properties was prepared though pressure-assisted layer by layer self-assembly method based on the electrostatic interactions of chitosan (CS), sodium alginate (SA) and polyfunctional lysine. For the modified C-S-C-S-L membrane, the contact angle decreased to 35°, the bovine serum albumin (BSA) adsorption mass of static fouling on the membrane surface decreased to 10μg/cm(2), and the secondary water flux recovery rate (FRR) of dynamic fouling of BSA and humic acid (HA) pollutants increased to 98% and 99%, respectively, exhibiting excellent antifouling performance. The results demonstrated that using charged bio-macromolecules and amino acids to build zwitterionic surface was effective and convenient to change the interface properties of the separation membrane through the pressure-assisted self-assembly modification method, and provided a new way for the industrial scale hydrophilic modification of hydrophobic porous membrane materials.
authors.affiliation: State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
authors.forename: Haiye
authors.initials: H
authors.lastname: Wang
authors.affiliation: State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
authors.forename: Xinzhen
authors.initials: X
authors.lastname: Zhao
authors.affiliation: State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: chunjuhe@dhu.edu.cn.
authors.forename: Chunju
authors.initials: C
authors.lastname: He
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D000818:Animals; D002417:Cattle; D048271:Chitosan / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D011145:Polyvinyls / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000737:chemistry; D005465:Fluorocarbon Polymers
chemical_list: D000464:Alginates; D048271:Chitosan; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D008567:Membranes, Artificial; D011145:Polyvinyls; D012710:Serum Albumin, Bovine; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers
keywords: Antifouling; Polyelectrolyte; Polyvinylidene fluoride; Zwitterion