친수성으로 표면개질한 폴리설폰막의 투과플럭스

초록

A hollow-fiber type polysulfone UF membrane was surface-coated with 2- hydroxyethylmethacrylate(HEMA). The effect of various coating parameters on permeation flux was investigated, such as concentration ratio of Azobisisobutyronitrile( AIBN)/HEMA, solvent (water or methanol), and UV irradiation time. The membrane coated with a solution of AIBN/ HEMA/methanol showed about 2.65 times higher water flux than that coated with a solution of AIBN/HEMA/water. The membrane coated with a solution of higher AIBN/HEMA ratio and a longer UV irradiation time exhibited a higher permeation flux. The membrane coated with a solution of lower AIBN/HEMA ratio needed a longer UV irradiation time for coating to get a same level of permeation flux. In order to have a greater permeation flux than uncoated membrane, the membrane should be coated with a solution of a certain AIBN/HEMA ratio and UV irradiation time. The fouling by oil emulsion occurred to both of the coated and the uncoated membrane. However, the fouling of coated membrane was much less than uncoated one; the water flux (0.2683 g/ cm2jmin) through the coated membrane was about 6 times higher than that (0.0448 /cm2jmin) through the uncoated membrane.

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