SURFACE MODIFICATION OF POLYPROPYLENE MICROPOROUS MEMBRANES BY THE ADSORPTION OF NON-IONIC SURFACTANTS

• Published in: Chinese journal of polymer science Vol. 24; no. 4; pp. 421 - 429
• Main Author: Ya-jie Xie Hai-yin Yu Zhi-kang Xu
• Format: Journal Article
• Language: English
• Published: 01.07.2006
• Subjects: 聚丙烯微孔膜; 表面改性; 非离子表面活性剂
• ISSN: 0256-7679; 1439-6203
• DOI: 10.1142/S0256767906001473

Surface modification by physical adsorption of a series of non-ionic surfactants including Tween 20, Tween 40, Tween 60, Tween 80 and Tween 85, was accomplished on polypropylene microporous hollow fiber and flat membranes. The adsorption curve of the membrane surface was analyzed by weight measurements and the typical results showed a twoplatform character similarly. Differences in the degree and curve shape of adsorption resulting from such factors as concentration, temperature, as well as water cleaning time were observed for Tween 85 among other Tweens. Attenuated total reflection - Fourier transform infrared spectroscopy analysis and field emission scanning electron microscopy observation showed that the adsorption of Tween on polypropylene microporous membrane （PPMM） is effective and occurs mainly in the pores of PPMMs at low adsorption amount, and on the membrane surface also at high adsorption value.