title: Ultravilolet-radiation-induced graft polymerization of acrylamide onto the melt-blown polypropylene filter element by dynamic method.
abstract: 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: 600 degrees C. 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.
authors.affiliation: Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. lindawwu@sina.com
authors.forename: Lin-lin
authors.initials: LL
authors.lastname: Wu
authors.forename: Guang-xia
authors.initials: GX
authors.lastname: Wu
authors.forename: Shu-guang
authors.initials: SG
authors.lastname: Xu
authors.forename: Hui
authors.initials: H
authors.lastname: Zhong
authors.forename: Ying-jie
authors.initials: YJ
authors.lastname: Shen
authors.forename: He-zhi
authors.initials: HZ
authors.lastname: Liu
authors.forename: Zheng-ming
authors.initials: ZM
authors.lastname: Huang
authors.forename: Xin-bo
authors.initials: XB
authors.lastname: Yang
authors.forename: Zong-huan
authors.initials: ZH
authors.lastname: Yuan
authors.forename: Lian-yi
authors.initials: LY
authors.lastname: Tang
authors.forename: Xiang-wei
authors.initials: XW
authors.lastname: Lin
authors.forename: Shao-lai
authors.initials: SL
authors.lastname: Zhang
authors.forename: Wei-jun
authors.initials: WJ
authors.lastname: Zhang
mesh_terms: D020106:Acrylamide / Q000737:chemistry* / Q000528:radiation effects*; D005374:Filtration / Q000295:instrumentation; D008851:Micropore Filters; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects*; D011126:Polypropylenes / Q000737:chemistry*; D012997:Solvents; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D011108:Polymers; D011126:Polypropylenes; D012997:Solvents; D020106:Acrylamide