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首页> 外文期刊>Journal of Membrane Science >FORMATION AND CHARACTERIZATION OF SUPPORTED MICROPOROUS CERAMIC MEMBRANES PREPARED BY SOL-GEL MODIFICATION TECHNIQUES
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FORMATION AND CHARACTERIZATION OF SUPPORTED MICROPOROUS CERAMIC MEMBRANES PREPARED BY SOL-GEL MODIFICATION TECHNIQUES

机译：溶胶-凝胶改性技术制备的微孔陶瓷支持膜的形成与表征

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The formation is described of supported microporous membranes (by IUPAC definition r(pore) < 1 nm), prepared by modification of mesoporous gamma-alumina membranes with polymeric sols. The mesoporous gamma-alumina membranes, with a top-layer thickness in the order of 7-10 mu m, and with pore radii of 2-2.5 nm, have a very high surface finish (mean roughness 40 nm). The amorphous microporous top-layer thickness is in the order of 60-100 nm. Gas transport properties are effectively improved as is shown by activated permeation and molecular sieve-like separation factors in the order of 50-200 for H-2/CH4. These microporous top-layers can be prepared from a relatively wide range of sol structures; from inorganic oligomers which are too small to result in significant scattering with SAXS, to polymeric structures with fractal dimensions in the range : 1 < d(f) < 2.04, and radii of gyration between 0.8 and 4 nm. [References: 55]
机译：描述了通过用聚合物溶胶改性介孔γ-氧化铝膜制备的负载型微孔膜（根据IUPAC定义，r（孔）<1 nm）的形成。介孔γ-氧化铝膜的顶层厚度约为7-10微米，孔半径为2-2.5 nm，具有很高的表面光洁度（平均粗糙度为40 nm）。无定形微孔顶层的厚度约为60-100nm。如活化渗透和分子筛样分离因子对H-2 / CH4的大约50-200所示，有效改善了气体传输性能。这些微孔顶层可以由相对较宽范围的溶胶结构制备。从太小的无机低聚物到用SAXS不能导致明显散射的聚合物，到分形尺寸范围在1

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