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化工学报  2014 

PAA-g-ZrO2复合膜过滤牛血清蛋白过程的污染阻力分析

DOI: 10.3969/j.issn.0438-1157.2014.03.027, PP. 954-959

Keywords: ,过滤,膜污染,蛋白质,丙烯酸,pH敏感,膜阻力

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Abstract:

通过对PAA-g-ZrO2复合膜过滤牛血清蛋白过程的污染阻力及其分布分析揭示接枝聚丙烯酸(PAA)对ZrO2膜抗污染性能的影响规律。结果表明:PAA-g-ZrO2复合膜和ZrO2膜的总阻力均随着过滤时间的延长而增加,但是PAA-g-ZrO2复合膜总阻力的增加趋势明显低于原ZrO2膜,同时,PAA-g-ZrO2复合膜的内部污染阻力Rif所占比例下降为原ZrO2膜的一半,这表明PAA接枝到ZrO2膜表面明显降低了膜孔内堵塞的内部污染,提高了膜的抗污染和易清洗性能。此外,溶液的pH值对PAA-g-ZrO2复合膜的污染阻力及其分布有着明显影响,当溶液pH值为8.0时,PAA-g-ZrO2复合膜几乎不存在膜孔堵塞污染。

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