将有机碱多乙烯多胺直接加到聚偏氟乙烯(PVDF)铸膜液中,利用L-S相转化法制备PVDF超滤膜;运用红外光谱、扫描电镜、接触角仪等对不同多乙烯多胺含量超滤膜的结构和性能进行表征.结果表明,多乙烯多胺的加入使PVDF超滤膜产生脱氟化氢反应,超滤膜的润湿性有明显改善.随着多乙烯多胺含量的增加,膜通量不断上升;当多乙烯多胺含量不超过6%时,超滤膜对BSA的截留率基本保持不变,当含量超过6%时,超滤膜的截留率明显下降.
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