通过溶胶-凝胶热涂法制备高通量的微孔二氧化硅分子筛膜,并将其应用于渗透蒸发乙酸脱水,评价二氧化硅分子筛膜的分离性能；利用粒度分析仪和SEM对溶胶和膜层进行表征.结果表明,溶胶中二氧化硅颗粒的直径为10～80 nm,无定形微孔二氧化硅分子筛膜对该体系显示了优异的分离性能,在353 K时渗透蒸发分离水质量分数为5％的乙酸水溶液时,通量为0.65 kg/(m2·h),分离系数达到120,经过35 h的渗透蒸发实验后分离系数增高到160左右,通量基本不变为0.60 kg/(m2·h).
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