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UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone) 被引量:6

UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone)
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摘要 Photo-grafting of hydrophilic monomer was used to enhance the hydrophilicity of poly(ether ether ketone) (PEEK) with the aim of extending its applications to biological fields. PEEK sheets were surface modified by grafting of acrylamide(AAm) with ultraviolet(UV) irradiation in the presence or absence of benzophenone(BP). The effects of BP, irradiation time and monomer concentration on the surface wettability of PEEK were investigated. Characteriza tion of modified PEEK using scanning electron microscopy(SEM), energy-disperse spectrometer(EDS) and water contact angle measurements shows that AAm was successfully grafted on PEEK surface both in presence and absence of BP. With the increase in irradiation time and monomer concentration, contact angles decrease to as low as 30°, demonstrating a significant improvement of surface hydrophilicity. In agreement with the decrease in contact angle, under identical conditions, the nitrogen concentration increases, suggesting the increase in grafting degree of the grafting polymerization. This investigation demonstrates a self-initiation of PEEK due to its BP-like structure in the backbone of the polymer. Though the graft polymerization proceeds more readily in the presence of BP, the self-initiated graft polymerization is clearly observed. Photo-grafting of hydrophilic monomer was used to enhance the hydrophilicity of poly(ether ether ketone) (PEEK) with the aim of extending its applications to biological fields. PEEK sheets were surface modified by grafting of acrylamide(AAm) with ultraviolet(UV) irradiation in the presence or absence of benzophenone(BP). The effects of BP, irradiation time and monomer concentration on the surface wettability of PEEK were investigated. Characteriza tion of modified PEEK using scanning electron microscopy(SEM), energy-disperse spectrometer(EDS) and water contact angle measurements shows that AAm was successfully grafted on PEEK surface both in presence and absence of BP. With the increase in irradiation time and monomer concentration, contact angles decrease to as low as 30°, demonstrating a significant improvement of surface hydrophilicity. In agreement with the decrease in contact angle, under identical conditions, the nitrogen concentration increases, suggesting the increase in grafting degree of the grafting polymerization. This investigation demonstrates a self-initiation of PEEK due to its BP-like structure in the backbone of the polymer. Though the graft polymerization proceeds more readily in the presence of BP, the self-initiated graft polymerization is clearly observed.
出处 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第1期162-165,共4页 高等学校化学研究(英文版)
基金 Supported by the Scientific and Technological Development Programs of Beijing Municipal Education Commission, China (No.KM201010011004) the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education, China, the 2011 Merit-based Research Funding for Picked Returned Overseas Scholars, Beijing Municipality, China Beijing Technology and Business University Through a Research Project Approved for Undergraduates
关键词 Poly(ether ether ketone)(PEEK) UV-grafting Surface modification Self-initiation Graft polymerization Poly(ether ether ketone)(PEEK) UV-grafting Surface modification Self-initiation Graft polymerization
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