Surface Modification of Polypropylene Hollow Fiber Membrane with L-DOPA for MABR

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Abstract

A no-defect composite hollow fiber membrane was prepared through L-DOPA oxidation since its strong adhesion and film forming properties in alkaline aqueous solution. The effects of concentrations of L-DOPA, reaction time and solution pH on the modification were studied. The properties of modified membrane, such as surface topography, membrane hydrophobicity, gas flux and water contact angel, before and after the modification were analyzed, respectively. The no-defect surface can be formed at the concentration of 1.5 g/L (pH 9.5) after 7 h reaction, with a gas flux of 0.3176 mL/(cm²·s) and water contact angel of 75.1° were achieved. The MABR test indicated that the properties of COD and NH₄⁺-N removals of the modified membrane were improved efficiently.

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	Articles by authors
	Wang Qin
	Hu Liang
	Hou Feifei
	Li Baoan

Keywords： L-DOPA； polypropylene hollow fiber； surface polymerization； MABR

Received 2014-04-30;

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Cite this article:

Wang Qin, Hu Liang, Hou Feifei, Li Baoan.Surface Modification of Polypropylene Hollow Fiber Membrane with L-DOPA for MABR[J] Chemcial Industry and Engineering, 2015,V32(6): 52-57

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