| Project/Area Number |
02650710
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
発酵工学
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| Research Institution | Shizuoka University |
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Principal Investigator |
INAGAKI Norihiro Shizuoka University, Dept. of Materials Science, Professor, 工学部, 教授 (30022015)
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| Co-Investigator(Kenkyū-buntansha) |
TASAKA Sigeru Shizuoka University, Dept. of Materials Science, Ass. Profesor, 工学部, 助教授 (10134793)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1990: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Hydrophobicity / pervaporation / Separation Membrane / Ethanol Solution / Separation Factor / Porous Membrane / Contact Angle / Plasma Graft Polymerization / パ-ベ-パレチション |
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| Research Abstract |
The objective of the project is to prepare ethanol-selective separation membranes for pervaporation of ethanol-water mixtures. Four research programs for the aim were carried out and results of the researches were summarized as follows.
1. Basic Design of Ethanol-Selective Separation Membranes
A model of preferential-sorption-capillary flow was discussed for application of separation membranes in the pervaporation process. The membranes used for ethanol-selective separation are required to have pores to travel ethanol molecules across membrane and to have hydrophobic surface with less than 30 mJ/m^2.
2. Preparation of Hydrophobic Surface
To obtain hydrophobic surface with less than 30 mJ/^2M, the introduction of CF, CF_2, and CF_3 residues onto polymers was effective. The efficiency of these residues in hydrophobicity was CF_3>CF_2>CF.
3. Durable Surface of Polymers
Surface modification by graft-polymers led to unchanged surface properties even when the surface was exposed to hydrophilic or hydrophobic atmosphere at elevated temperature.
4. Separation Membranes Surface-modified by Graft Polymerization
Porous polyethylene and polypropylene membranes that were plasma-graft-polymerized with fluorinated acrylate monomers showed high ethanol separation factors in pervaporation of ethanol-water mixtures. An ethanol-water mixture with 5 wt% ethanol was concentrated 24 wt% ethanol in pervaporation using the porous membranes plasma-graft-polymerized.
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