Preparation of polysiloxane optical resolution membranes containing high-density chiral spaces by using sol-gel method
| Project/Area Number |
08651049
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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 |
高分子合成
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| Research Institution | Niigata University |
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Principal Investigator |
AOKI Toshiki Niigata University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80212372)
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| Co-Investigator(Kenkyū-buntansha) |
OIKAWA Eizo Niigata University, Faculty of Engineering, Professor, 工学部, 教授 (00018467)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1996: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | pinanyl group / alkoxysilyl group / enantioselective permeation / membrane / polysiloxane / optacal resolution membrane / sol-gel method / chiral space / 末端アセチレン / キラルポリマー |
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| Research Abstract |
Some silylacetylene polymers having bulky chiral pinanyl groups were found to show good enantioselective permeabilities. We thought that the permselectivity was caused by the difference of diffusivity between R-isomer and S-isomer through "high-density chiral spaces" surrounding by the several bulky pinanyl groups. However, since the chiral spaces were very small and the mobility of bulky pinanyl groups was low, permeation rates were pretty low. This problem was solved by introducing "polysiloxane" units into membrane polymers. Direct modification of membranes by "sol-gel method" or hydrolysis of alkylsiloxy groups made membranes very brittle, and as a result these membranes were not able to be used for separation membranes. Therefore, it is important to modify the membranes without affecting other structures.
In summary, we obtained the following three conclusions.
1)"High-density chiral spaces" is very important for high enantioselectivity.
2) "Polysiloxane" is effective for enhancing permeability.
3) "Sol-gel method" has to be controlled more precisely to maintain membrane strength.
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Report
(3 results)
Research Products
(11 results)
