Highly effective antifouling performance of N-vinyl-2-pyrrolidone modified polypropylene non-woven f
Highly effective antifouling performance of N-vinyl-2-pyrrolidone modified polypropylene non-woven f
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DOI：
10.1016/j.memsci.2010.11.072
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
Ranran Feng;Chanchan Wang;Xiaochen Xu;Fenglin Yang;Guangjing Xu;T. Jiang
中科院分区：
文献类型：
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作者：
Ranran Feng;Chanchan Wang;Xiaochen Xu;Fenglin Yang;Guangjing Xu;T. Jiang
采用臭氧表面活化和表面引发原子转移自由基聚合（ATRP）技术，在聚丙烯无纺布（PP-NWF）膜表面接枝亲水性聚合物聚N-乙烯基-2-吡咯烷酮（PNVP）。PNVP在膜表面的接枝度可以通过接枝时间的变化在很大范围内进行调节。通过傅里叶变换红外光谱（FTIR）、X射线荧光光谱（XRD）和扫描电子显微镜（SEM）对改性膜表面的化学和形态变化进行了详细表征。改性后膜的亲水性增加，水接触角从113.0±1.2°降低到52.1±3°。通过对水和活性污泥上清液的渗透实验，评价了改性膜的渗透性能。结果表明，改性膜的渗透通量和截留率均比原NWF膜高，通量损失小，渗透性能好。细菌在膜表面的粘附也进行了研究，这表明，细菌生长的抑制PMVP改性膜，和细菌的粘附是可逆的，由于亲水性的增强。
In this paper, a hydrophilic polymer, poly(N-vinyl-2-pyrrolidone) (PNVP), was grafted on the surface of polypropylene non-woven fabric (PP-NWF) membrane via ozone surface activation and surface-initiated atom transfer radical polymerization (ATRP). The grafting degree of PNVP on the membrane surface can be modulated in a wide range through the variation of grafting time. Chemical and morphological changes of the PNVP-modified membrane surface were characterized in detail by Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy and scanning electron microscopy (SEM). The hydrophilicity of the membrane increased upon modification with the water contact angle decreasing from 113.0±1.2° to 52.1±3°. Permeation experiments of water and supernatant solution of active sludge were conducted to evaluate the antifouling property of the PNVP-modified membranes, which results indicated that the modified membranes had higher permeation fluxes with enhanced rejection rates, lower flux loss and better antifouling property than those of the original NWF membrane. Bacterial adhesion on the studied membrane surfaces was also investigated, which showed that bacteria were restrained from growing on PNVP-modified membranes, and adhesion of bacteria was reversible due to the enhanced hydrophilicity.