Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (6): 1337.doi: 10.7503/cjcu20190706

• Physical Chemistry • Previous Articles     Next Articles

Preparation and Characterization of Tannin/Zwitterionic Modified Oil-water Separation Membrane

PENG Xinyan,LIU Yunhong*(),LI Jiawen,FENG Yilong,WANG Hanchun   

  1. School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou 362000, China
  • Received:2019-12-25 Online:2020-06-10 Published:2020-05-13
  • Contact: Yunhong LIU,Hanchun WANG E-mail:liuyunhong_9@163.com
  • Supported by:
    † Quanzhou Technology Plan Project, China(2019C105);Ph.D. Research Start-up Fund of Quanzhou Normal University, China

Abstract:

Based on the chemical properties of tannic acid and the special wettability of zwitterionic groups, we successfully prepared the ultrahydrophilic and underwater ultraoleophobic separation membrane. The stainless steel mesh was used as substrate, which was grafted by zwitterionic polymers after pre-treatment with tannic acid. The micro-chemical structure and wettability of the oil-water separation membrane were characterized by X-ray photoelectron spectroscopy(XPS), scanning electron microscope(SEM), and contact angle mea-suring instrument. The results show that zwitterionic groups were grafted through chemical bonding. The obtained oil-water separation membrane enable an efficient and energy-saving separation for various oil-water mixture by gravity-driven. Meanwhile, the membrane demonstrates excellent chemical stability and recyclability.

Key words: Tannic acid, Zwitterion, Ultrahydrophilic and underwater ultraoleophobics separation membrane, Surface modification, Oil-water separation

CLC Number: 

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