Effects of Polyvinyl Alcohol(PVA) Content on the Microstructures of Unsupported Alumina Membranes
Effects of Polyvinyl Alcohol(PVA) Content on the Microstructures of Unsupported Alumina Membranes
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DOI：
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发表时间：
2001
影响因子：
1.7
通讯作者：
Wang Da
中科院分区：
文献类型：
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作者：
Wang Da
聚乙烯醇（PVA）可以防止溶胶-凝胶法制备的铝膜在干燥过程中出现微裂纹，同时对膜的微观结构也有一定的影响。本文采用XRD、DTA、DGA、FT-IR和BET等方法对PVA掺杂氧化铝膜的晶相、热稳定性、比表面积、孔径分布和孔表面分形结构进行了表征。结果表明，PVA在400℃煅烧后可完全脱除。PVA掺杂铝膜的N2吸附量大于纯膜，但不与PVA含量成比例增加。PVA掺杂的氧化铝膜具有更尖锐的孔径分布，更高的孔体积和更低的孔表面分形维数。
Polyvinyl Alcohol(PVA) can prevent the microcrack of the sol-gel-derived aluminamembranes from occurring during the drying process, and at the same time has effects on themicrostructures of the membranes. In the present paper, the crystalline phase, thermal stability,specific surface area, pore size distribution and pore surface fractal of alumina membranes dopedwith PVA were characterized by XRD,DTA,DGA, FT-IR and BET. The results show that PVA iscompletely removed after calcination at 400℃. The N2 adsorbed amount of PVA-doped aluminamembranes is greater than that of pure membranes, but doesn't increase in proportion to PVAcontent. The PVA-doped alumina membranes have a sharper pore size distribution, higher porevolume and lower pore surface fractal dimension.