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Preparation and characterization of PVDF-g-PVP and PVDF/PVP microfiltration membranes

Authors： CHEN Lifang, LU Xiaofeng, BIAN Xiaokai, HOU Zhengchi, LIU Zhongying, SHI Liuqing, QIN Qiang, PAN Ling, SHEN Liguo

Units： Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

KeyWords： PVDF-g-PVP; PVDF/PVP; microfiltration membrane

ClassificationCode：TQ 028.8

year,volume(issue):pagination： 2014,34(2):18-22

Abstract：

PVDF-g-PVP powders synthesized via radiation grafting metnod and PVDF/PVP blends were cast into microfiltration (MF) membranes via the phase-inversion method. The PVDF membrane, PVDF-g-PVP and PVDF/PVP microfiltration membranes were characterized by elemental analysis, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric(TG) analysis, differential scanning calorimetry(DSC) and scanning electron microscopy(SEM). The contact angle and water flux were also measured. The results con?rmed that the existence of PVP improved the hydrophilicity of the MF membranes cast from PVDF-g-PVP grafted powders and PVDF/PVP blends, although the thermal stability of PVDF-g-PVP and PVDF/PVP membranes was slightly reduced. PVP in the blend membranes acted as pore former, and most of them lost during the membrane preparation process. For the above-mentioned reasons, PVDF/PVP membranes had lower N content, more pores, higher water flux and lower hydrophilicity, in contrast to PVDF-g-PVP membranes with the same PVP content in the casting solution.

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AuthorIntro：

陈利芳（1987-），女，江苏人，博士研究生，从事超/微滤膜改性方面的研究，*通讯联系人，luxiaofeng@sinap.ac.cn

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