摘要
将季胺阳离子化聚乙烯醇膜材料和磷酸酯化阴离子聚乙烯醇膜材料按不同摩尔比共混制备了一系列膜 ,用等温吸附的方法测定了不同浓度的乙醇 /水溶液在各种膜中的吸附量及吸附选择性 .结果表明 ,与聚乙烯醇膜相比 ,水 /乙醇在各种聚电解质膜中的吸附量均有不同程度的提高 ,当两种膜材料以接近 1∶1的比例共混时 ,各种浓度的乙醇 /水溶液在该膜中的吸附量为最大 ,水
A series of blended membranes were prepared in different ratio with cationic polyvinyl alcohol (PVA +) prepared from polyvinyl alcohol and 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPAC) and anionic polyvinyl alcohol (PVA -) prepared from phosphatic acid and polyvinyl alcohol. Isothermal sorption of the water/ethanol mixture with different concentrations by the membranes was studied. It was found that the PVA +/PVA - blended membrane with a PVA + content of 50% (mole fraction) shows the highest total sorption and water sorption in different water/ethanol mixtures. It was also found that total sorption and water sorption of polyelectrolyte membranes are more or less higher than that of the polyvinyl alcohol membrane. The IR spectra showed that PVA + and PVA - have some structural changes compared to polyvinyl alcohol.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2001年第6期12-15,共4页
Membrane Science and Technology
基金
国家自然科学基金资助项目 (2 0 0 76 0 2 3)
