JPS577206A - Cellulose ester anisotropic membrane - Google Patents
Cellulose ester anisotropic membraneInfo
- Publication number
- JPS577206A JPS577206A JP8022580A JP8022580A JPS577206A JP S577206 A JPS577206 A JP S577206A JP 8022580 A JP8022580 A JP 8022580A JP 8022580 A JP8022580 A JP 8022580A JP S577206 A JPS577206 A JP S577206A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- cellulose ester
- polymer
- porous layer
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
PURPOSE: To obtain a cellulose ester anisotropic membrane with excellent selectivity as well as permeability by esterifying a membrane comprising a cellulose derivative by an aliphatic monocarboxylic acid having a specific number of a carbon atom.
CONSTITUTION: The cellulose ester anisotropic membrane is one comprising a cellulose derivative esterified with a linear and/or a branched chain aliphatic monocarboxylic acid having 6W16 carbon atoms. For example, a solution prepared by dissolving a polymer in a mixed solvent consisting of a volatile good solvent for the polymer and a nonsolvent therefor is cast onto a support having a smooth surface and after a part or all of said volatile good solvent is volatilized, the formed membrane is immersed in a coagulating bath and, thereafter, dried to obtain said cellulose ester anisotrapic membrane. The resulting membrane consists of a dense porous layer with a thickness of 0.01W10μm and a coarse porous layer with a thickness of 50W300μm and has excellent gas permeability, selectivity and high mechanical strength.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8022580A JPS577206A (en) | 1980-06-16 | 1980-06-16 | Cellulose ester anisotropic membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8022580A JPS577206A (en) | 1980-06-16 | 1980-06-16 | Cellulose ester anisotropic membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS577206A true JPS577206A (en) | 1982-01-14 |
Family
ID=13712413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8022580A Pending JPS577206A (en) | 1980-06-16 | 1980-06-16 | Cellulose ester anisotropic membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS577206A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59199247A (en) * | 1983-04-28 | 1984-11-12 | 旭化成株式会社 | Composite film of regenerated cellulose |
| JPS6125608A (en) * | 1984-07-14 | 1986-02-04 | Agency Of Ind Science & Technol | Separating film for water-soluble organic material and separation of water-soluble organic material utilizing the membrane |
| US4999110A (en) * | 1986-11-07 | 1991-03-12 | Asahi Kasei Kogyo Kabushiki Kaisha | Regenerated cellulose membrane and processes for preparation thereof |
-
1980
- 1980-06-16 JP JP8022580A patent/JPS577206A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59199247A (en) * | 1983-04-28 | 1984-11-12 | 旭化成株式会社 | Composite film of regenerated cellulose |
| JPH0446978B2 (en) * | 1983-04-28 | 1992-07-31 | Asahi Chemical Ind | |
| JPS6125608A (en) * | 1984-07-14 | 1986-02-04 | Agency Of Ind Science & Technol | Separating film for water-soluble organic material and separation of water-soluble organic material utilizing the membrane |
| JPH0144082B2 (en) * | 1984-07-14 | 1989-09-26 | Kogyo Gijutsuin | |
| US4999110A (en) * | 1986-11-07 | 1991-03-12 | Asahi Kasei Kogyo Kabushiki Kaisha | Regenerated cellulose membrane and processes for preparation thereof |
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