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研究了聚酰胺复合纳滤膜 NF- 3的分离特性 ,实验结果表明 :纳滤膜 NF- 3能有效截留二价盐和相对分子质量大于 30 0的有机小分子 ;对 Na2 SO4 和 PEG60 0的截留率随压力增大而下降 ;Na2 SO4 浓度的变化对截留率无明显影响。并探索应用于酸性染料的可行性 ,发现 NF- 3能有效地提纯和浓缩酸性染料
The experimental results show that the nanofiltration membrane NF-3 can effectively trap bivalent salts and small organic molecules with relative molecular mass of more than 300, and the adsorption of Na2 SO4 and PEG60 0 The rejection rate decreased with the increase of pressure. The change of Na2 SO4 concentration had no significant effect on the rejection rate. And to explore the feasibility of application of acid dyes and found that NF-3 can effectively purify and concentrate acid dyes