title: [Grafting and characterization of poly (ethylene glycol) on polysulfone sheets].
abstract: Grafting of poly (ethylene glycol) (PEG) on the surface of polysulfone (PSF) sheets by simultaneous or sequential UV irradiation with 4-azidobenzoic acid as the photocoupler was carried out. Water contact angle measurements showed that there was a great improvement of hydrophilicity on the grafted surface. X-ray photoelectron spectroscopy suggested that the area covered by PEG be 77.3% and 41.9% respectively after grafting by simultaneous and sequential pathways. With atomic force microscope (AFM), obvious difference in the shape and the phase mode was observed between surfaces of PEG-g-PSF sheets made by these two pathways. Evidences implied that simultaneous pathway would produce a branched PEG layer on the surface, while sequential pathway was coupled with a "pan-cake" PEG layer on it. This study provides the foundation for further advancement in tethering brush-like PEG on PSF hollow fiber membranes.
authors.affiliation: Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Sun
authors.forename: Shudong
authors.initials: S
authors.lastname: Sun
authors.forename: Hong
authors.initials: H
authors.lastname: Xie
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Huang
authors.forename: Yilun
authors.initials: Y
authors.lastname: Yue
mesh_terms: D001386:Azides / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D008567:Membranes, Artificial; D018625:Microscopy, Atomic Force; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013450:Sulfones / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D001386:Azides; D001672:Biocompatible Materials; D020099:Coated Materials, Biocompatible; D008567:Membranes, Artificial; D011108:Polymers; D013450:Sulfones; C017662:polysulfone P 1700; D011092:Polyethylene Glycols; C087164:4-azidobenzoic acid