Xie Ya-jie, Yu Hai-yin, Wang Shu-yuan, Xu Zhi-kang
College of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, China.
J Environ Sci (China). 2007;19(12):1461-5. doi: 10.1016/s1001-0742(07)60238-1.
Surface modification by physical adsorption of Tween 20 was accomplished on polypropylene microporous membranes (PPMMs). Attenuated total reflection-Fourier transform infrared spectroscopy (ATR/FT-IR) and field emission scanning electron microscope (FE-SEM) were used to characterize the chemical and morphological changes on the membrane surfaces. Water contact angles and relative pure water fluxes were measured. The data showed that the hydrophilic performance for the modified membranes increased with the increase in the adsorption amount of Tween 20 onto the surface or into the pores of polypropylene microporous membranes. To test the antifouling property of the membranes by the adsorption of Tween 20 in a membrane bioreactor (MBR), filtration for active sludge was performed using synthetic wastewater. With the help of the data of water fluxes and the FE-SEM photos of the modified PPMMs before or after operating in a MBR for about 12 d, the PPMMs with monolayer adsorption of Tween 20 showed higher remained flux and stronger antifouling ability than unmodified membrane and other modification membranes studied.
通过吐温20的物理吸附对聚丙烯微孔膜（PPMMs）进行表面改性。采用衰减全反射傅里叶变换红外光谱（ATR/FT-IR）和场发射扫描电子显微镜（FE-SEM）对膜表面的化学和形态变化进行表征。测量了水接触角和相对纯水通量。数据表明，改性膜的亲水性随着吐温20在聚丙烯微孔膜表面或孔内吸附量的增加而增强。为了测试吐温20吸附对膜生物反应器（MBR）中膜的抗污染性能，使用合成废水对活性污泥进行过滤。借助在MBR中运行约12天后改性PPMMs的水通量数据和FE-SEM照片，单层吸附吐温20的PPMMs比未改性膜和其他研究的改性膜表现出更高的剩余通量和更强的抗污染能力。
