1998 Fiscal Year Final Research Report Summary
PREPARATION OF MICROCHANNEL MATERIALS FOR SEPARATION OF ORGANIC COMPOUNDS
| Project/Area Number |
09650847
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
反応・分離工学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
KUSAKABE Katsuki Kyushu University, Graduate School of Engineering, Department of Materials Physics and Chemistry, Associate Professor, 大学院・工学研究科, 助教授 (30153274)
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| Co-Investigator(Kenkyū-buntansha) |
ISODA Takaaki Kyushu University, Graduate School of Engineering, Department of Materials Physi, 大学院・工学研究科, 助手 (70284544)
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| Project Period (FY) |
1997 – 1998
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| Keywords | inorganic membrane / silica membrane / sol-gel / micropore / pore size control / template / porous / alkoxide |
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| Research Abstract |
Porous silica membranes were formed by a sal-gel technique on a gamma-alumina-coated alpha-alumina tube using sols which were prepared from tetraethoxysilane (TEOS) and octyl-, dodecyl, or octadecyltriethoxysilane. The alkyltriethoxysilanes were used as the template to control the pore size. The effect of the length of alkyl groups on pore structure as well as the permeation properties of the silica membranes were then investigated. The molar ratio of water to total alkoxides in the sols, x, strongly influenced the pore structure. A silica membrane which was prepared with octadecyltriethoxysilane contained mesopores and cracks, but the silica membranes prepared octyl- and dodecyltriethoxysilane were defect-free. Permeations to gasses with a variety of molecular sizes showed that the majority of micropores were in the 0.3-0.4 nm range for the silica membranes which had been calcinated at 600ﾟC.These micropores were basically formed by the decomposition of alkyl chains in the template, while the mesopore structure was achieved during the gelation step.
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