title: Electrically driven biofouling release of a poly(tetrafluoroethylene) membrane modified with an electrically induced reversibly cross-linked polymer.
abstract: Electrically induced reversible reactions between ferrocene (Fc) and β-cyclodextrin (β-CD) groups have been utilized for preparation of poly(tetrafluoroethylene) (PTFE) membranes exhibiting electrically driven biofouling release properties. PTFE membrane is surface-modified with polymer chains possessing Fc pendant groups. The surface layer is then cross-linked with a difunctional β-CD compound by means of the Fc/β-CD complexation reaction. The electrically induced reversibly cross-linking and de-cross-linking behaviors of the surface layer of the modified PTFE membrane have been characterized with Fourier transform Infrared, X-ray photoelectron spectroscopy, and scanning electron microscopy. The surface-modified PTFE membrane has been fouled with protein absorption. Electrical treatment of the fouled membrane results in a protein detachment from the membrane surface driven by the surface structure change accompanied with the electrically induced de-cross-linking reaction of the Fc/β-CD linkages. A smart membrane exhibiting a novel cleaning technology for membrane fouling has been developed.
authors.affiliation: Department of Chemical Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan.
authors.forename: Tsai-Wei
authors.initials: TW
authors.lastname: Chuo
authors.forename: Ta-Chin
authors.initials: TC
authors.lastname: Wei
authors.forename: Yung
authors.initials: Y
authors.lastname: Chang
authors.forename: Ying-Ling
authors.initials: YL
authors.lastname: Liu
mesh_terms: D000042:Absorption; D057219:Biofouling / Q000517:prevention & control*; D004560:Electricity; D005296:Ferrous Compounds / Q000737:chemistry; D008567:Membranes, Artificial; D000075163:Metallocenes; D011138:Polytetrafluoroethylene / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry / Q000378:metabolism; D013499:Surface Properties; D047392:beta-Cyclodextrins / Q000737:chemistry
chemical_list: D005296:Ferrous Compounds; D008567:Membranes, Artificial; D000075163:Metallocenes; D011506:Proteins; D047392:beta-Cyclodextrins; D011138:Polytetrafluoroethylene; C031215:betadex; C004998:ferrocene