期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 32, 期 2, 页码 143-150出版社
SPRINGER
DOI: 10.1007/s10118-014-1371-7
关键词
Poly(vinylidene fluoride); Membrane; Triethylphosphate; Hydrophilicity; Amphiphilic copolymer
资金
- National Natural Science Foundation of China [20974094]
- National 973 Program [2009CB623402]
- Key Innovation Team for Science and Technology of Zhejiang Province, China [2009R50047]
- Postdoctoral Science Foundation [Bsh1202045]
Porous PVDF blend membranes with good hydrophilicity and a symmetric structure were prepared by the phase inversion method using amphiphilic brush-like copolymers, P(MMA-r-PEGMA), as hydrophilic additive and triethylphosphate (TEP) as solvent. P(MMA-r-PEGMA) was synthesized by radical polymerization in TEP. Then the obtained amphiphilic copolymer solution was mixed with PVDF and TEP to prepare the dope solution. The effects of P(MMA-r-PEGMA) content and coagulation composition on membrane morphologies were investigated using scanning electron microscopy (SEM). The results demonstrated that, even blended with amphiphilic copolymers, a symmetric structure can be formed. Hollow fiber membranes with a mainly symmetric structure were also fabricated. The dry hollow fiber membranes showed good hydrophilicity, high flux and good rejection performance because of their hydrophilic surface and pores wall.
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