title: Engineering a Highly Hydrophilic PVDF Membrane via Binding TiO₂Nanoparticles and a PVA Layer onto a Membrane Surface.
abstract: A highly hydrophilic PVDF membrane was fabricated through chemically binding TiO2 nanoparticles and a poly(vinyl alcohol) (PVA) layer onto a membrane surface simultaneously. The chemical composition of the modified membrane surface was determined by X-ray photoelectron spectroscopy, and the binding performance of TiO2 nanoparticles and the PVA layer was investigated by a rinsing test. The results indicated that the TiO2 nanoparticles were uniformly and strongly tailored onto the membrane surface, while the PVA layer was firmly attached onto the surface of TiO2 nanoparticles and the membrane by adsorption-cross-linking. The possible mechanisms during the modification process and filtration performance, i.e., water permeability and bovine serum albumin (BSA) rejection, were investigated as well. Furthermore, antifouling property was discussed through multicycles of BSA solution filtration tests, where the flux recovery ratio was significantly increased from 20.0% for pristine PVDF membrane to 80.5% for PVDF/TiO2/PVA-modified membrane. This remarkable promotion is mainly ascribed to the improvement of surface hydrophilicity, where the water contact angle of the membrane surface was decreased from 84° for pristine membrane to 24° for PVDF/TiO2/PVA membrane. This study presents a novel and varied strategy for immobilization of nanoparticles and PVA layer on substrate surface, which could be easily adapted for a variety of materials for surface modification.
authors: The State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University, Shanghai, 201620, People's Republic of China.
authors: Aiwen
authors: A
authors: Qin
authors: The State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University, Shanghai, 201620, People's Republic of China.
authors: Xiang
authors: X
authors: Li
authors: The State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University, Shanghai, 201620, People's Republic of China.
authors: Xinzhen
authors: X
authors: Zhao
authors: The State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University, Shanghai, 201620, People's Republic of China.
authors: Dapeng
authors: D
authors: Liu
authors: The State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University, Shanghai, 201620, People's Republic of China.
authors: Chunju
authors: C
authors: He
mesh_terms: D000818:Animals; D057219:Biofouling; D002417:Cattle; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D018625:Microscopy, Atomic Force; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010539:Permeability; D056951:Photoelectron Spectroscopy; D011142:Polyvinyl Alcohol / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D005465:Fluorocarbon Polymers
chemical_list: D008567:Membranes, Artificial; D011142:Polyvinyl Alcohol; D011145:Polyvinyls; D012710:Serum Albumin, Bovine; D014025:Titanium; D014867:Water; C009495:titanium dioxide; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers
keywords: TiO2; antifouling property; poly(vinyl alcohol); polyvinylidene fluoride; surface modification