1994 Fiscal Year Final Research Report Summary
New high Performance Gas Separation membrane Prepared From Novel Reaction Route
| Project/Area Number |
05555252
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子合成
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| Research Institution | Science University of Tokyo |
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Principal Investigator |
KATO Masao Science university of Tokyo Professor, 基礎工学部, 教授 (70214400)
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| Co-Investigator(Kenkyū-buntansha) |
KIMIJIMA Tetsuya Nippon Sanso Co.Ltd. Researcher, 技術部
NAGASAKI Yukio Science university of Tokyo Assistant Professor, 基礎工学部, 講師 (90198309)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Gas Separation Membrane / Silicon-Containing Polymers / Novel Synthesis / Si-Containing Polymers With Reactive Groups / Interfacial Polymerizations |
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| Research Abstract |
For creation of gas separation membrane with a high performance, we started to prepare novel membrane materials from our original reaction routes. Relation between the polymer structure and their characteristics was also investigated in detail.
Using-4-methylstirene as starting material, several types of Si-containing stirene monomers were synthesized. From gas permeability measurements of the polymer membrane thus obtained, polystirene with bis (trimethylsilyl) methyl group at para position (polySi2) showed fairly high gas permeability (P_<O2>=45 barrer) . Affinity of oxygen molecule toward organosilicon moiety is one of the reason to show such high gas permeability. Actually, with increasing Si-content in the polystirene membrane, the solubility of oxygen increased. However, the polystirene with three Si atoms in each monomeric unit (PolySi3) showed one order of magnitude low permeability than polySi2. It is very curious that PolySi3 showed low Tg (90ﾟC) than that of polySi2 (160ﾟC). Contrary to the large free space of polySi2, polySi3 may decrease free space due to the packing by the flexible side chains.
Copolymerization of Si-containing stirenes with methacryloyl chloride provided reactive copolymers with acid chloride moiety as pendant groups with desired extent.Interfacial polycondensation of the copolymer thus obtained with diamines gave ultra thin films. Such ultra thin film is promising as gas separation membrane wit high flux.
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