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Study on the influence of reaction time on the structure and properties of the PVDF membrane modified through the method of atom transfer radical polymerization
Author(s) -
Zhao Yiping,
Zhao Haiyang,
Zhou Kaipeng,
Zhang Guifang,
Chen Li,
Feng Xia
Publication year - 2014
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23641
Subject(s) - membrane , contact angle , materials science , atom transfer radical polymerization , polymer chemistry , fourier transform infrared spectroscopy , chemical engineering , permeation , differential scanning calorimetry , radical polymerization , polymerization , polymer , composite material , chemistry , biochemistry , physics , engineering , thermodynamics
A thermo‐responsive membrane, poly(vinylidene fluoride) (PVDF‐g‐PNIPAAm), was successfully prepared from PVDF membrane through surface‐initiated atom transfer radical polymerization (ATRP) of a thermo‐responsive monomer, N‐isopropyl acrylamide (NIPAAm). The influence of the reaction time on ATRP was studied in detail. The grafting membrane was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and X‐ray photoelectron spectroscopy (XPS). The results showed that NIPAAm was successfully grafted on the PVDF membrane, the membrane pores became smaller and the reaction time of 36 h was in favor of surface‐initiated ATRP. The thermal stability of PVDF membrane and PVDF‐g‐PNIPAAm membranes was characterized by differential scanning calorimetry (DSC). Contact angles of membrane surface, water penetration and protein solution permeation were tested. Water contact angles of PVDF membrane reduced after the surface grafting of NIPAAm, which illuminated that the hydrophilicity of the grafted membrane was improved. The PVDF‐g‐PNIPAAm membranes exhibited good thermo‐responsive permeability and antifouling property. POLYM. ENG. SCI., 54:1013–1018, 2014. © 2013 Society of Plastics Engineers