Environmental catalysis and materials

Beijing Tong Ren Tang Company Limited Scientific Research Institute, Beijing 100011, China

WU Lin-lin , WU Guang-xia , XU Shu-guang , ZHONG Hui , SHEN Ying-jie , LIU He-zhi , HUANG Zheng-ming , YANG Xin-bo , YUAN Zong-huan , TANG Lian-yi , LIN Xiang-wei , ZHANG Shao-lai , ZHANG Wei-jun


Received December 20, 2006,Revised July 01, 2007, Accepted , Available online

Volume 19,2007,Pages 1387-1392

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By dynamic method under UV irradiation, commercial melt-blown polypropylene (PPMB) filter element was modified with acrylamide (AAm) using benzophenone (BP) as initiator. Attenuated total reflection-Fourier transform infrared spectroscopy and scanning electron microscope verified that polyacrylamide chain was grafted on the fiber surface of PPMB filter element. Elemental content analysis with energy dispersive X-ray of fibers revealed that the polymerization content in the inner part of filter element was relatively higher than that in the outer. Degree of grafting changed with initiator concentration, monomer concentration, reaction temperature and reached 2.6% at the reaction condition: CBP=0.06 mol/L, CAAm=2.0 mol/L, irradiation time: 80 min, temperature: 60℃. Relative water flux altered with the hydrophilicity and pore size of filter element. In the antifouling test, the modified filter gave greater flux recovery (approximately 70%) after filtration of the water extract of Liuweidihuang, suggesting that the fouling layer was more easily reversible due to the hydrophilic nature of the modified filter.

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