Ultravilolet-radiation-induced graft polymerization of acrylamide onto the melt-blown polypropylene filter element by dynamic method.
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.
Wu
Lin-lin
LL
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. lindawwu@sina.com
Wu
Guang-xia
GX
Xu
Shu-guang
SG
Zhong
Hui
H
Shen
Ying-jie
YJ
Liu
He-zhi
HZ
Huang
Zheng-ming
ZM
Yang
Xin-bo
XB
Yuan
Zong-huan
ZH
Tang
Lian-yi
LY
Lin
Xiang-wei
XW
Zhang
Shao-lai
SL
Zhang
Wei-jun
WJ
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
D011108:Polymers; D011126:Polypropylenes; D012997:Solvents; D020106:Acrylamide