Ultravilolet-radiation-induced graft polymerization of acrylamide onto the melt-blown polypropylene filter element by dynamic method  

作　　者：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 

机构地区：[1]Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China [2]Insititute for Drug and Instrument Control of Health Dept GLD of PLA, Beijing 100071, China [3]302 Hospital of PLA, Beijing 100039, China [4]301 Hospital of PLA, Beijing 100853, China [5]The Greatwall Pharmaceutical Factory of Beijing, Beijing 100071, China [6]Beijing Tong Ren Tang Company Limited Scientific Research Institute, Beijing 100011, China

出　　处：《Journal of Environmental Sciences》2007年第11期1387-1392,共6页环境科学学报（英文版）

基　　金：Project supported by the Natural Science Foundation of Beijing(No.2051002);Science and Technology Programme of Beijing(No.D0205004040421)

摘　　要：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.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.

关 键 词：melt-blown polypropylene filter element UV-induced graft polymerization surface modification dynamic method 

分 类 号：TQ32[化学工程—合成树脂塑料工业]