Synthesis of mesoporous alumina using polyvinyl alcohol template as porosity control additive
Synthesis of mesoporous alumina using polyvinyl alcohol template as porosity control additive
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以聚乙烯醇模板剂为孔隙控制添加剂合成介孔氧化铝
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
C. Păcurariu
中科院分区：
文献类型：
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作者：
Z. Ecsedi;I. Lazău;C. Păcurariu
研究了聚乙烯醇（PVA）模板剂和煅烧温度对氧化铝薄膜性能的影响。采用溶胶-凝胶法，以三异丙醇铝为前驱体制备了样品。通过氮气吸附/脱附分析确定微观结构、孔径和孔体积的变化，并使用压汞法确定大孔径分布。采用TEM和SEM观察了这些样品的织构和颗粒形态。干燥和退火后的实验观察表明，用聚乙烯醇模板制备无裂纹的纳米多孔氧化铝薄膜是可能的。所获得的氧化铝样品具有大孔微观结构（对于用42.5wt%的PVA添加物制备并在1000°C下退火的样品，平均孔径dav = 34.9 μ π ι）和高比例的中孔（对于相同样品，平均孔径Dav = 14.Onm）。
The effects of polyvinyl alcohol (PVA) template and calcinations temperatures on the characteristics of the alumina fi lms were investigated. The samples were prepared by sol-gel method using aluminium triisopropylate precursor. The variation of microstructure, pore size and pore volume, were determined by nitrogen adsorption/ desorption analysis and the macropore size distribution was determined using mercury porosimetry. TEM and SEM were used to observe the texture of these samples and the particle morphology. Experimental observation after drying and annealing shows that it is possible to produce crack free nanoporous alumina fi lms using polyvinyl alcohol template. The obtained alumina samples have macroporous microstructure (with the average pore diameter d av = 34.9 μm, for sample prepared with 42.5 wt% of PVA addition and annealed at 1000°C) with high portion of mesopores (with the average pore diameter D av = 14.0 nm for the same sample).