JPS5570304A - Production of dry membrane with selective permeability - Google Patents
Production of dry membrane with selective permeabilityInfo
- Publication number
- JPS5570304A JPS5570304A JP14440478A JP14440478A JPS5570304A JP S5570304 A JPS5570304 A JP S5570304A JP 14440478 A JP14440478 A JP 14440478A JP 14440478 A JP14440478 A JP 14440478A JP S5570304 A JPS5570304 A JP S5570304A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- membrane
- water
- dope solution
- wet membrane
- 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
- 239000012528 membrane Substances 0.000 title abstract 8
- 230000035699 permeability Effects 0.000 title 1
- 239000000758 substrate Substances 0.000 abstract 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 229920001577 copolymer Polymers 0.000 abstract 2
- 239000004745 nonwoven fabric Substances 0.000 abstract 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract 1
- 239000005977 Ethylene Substances 0.000 abstract 1
- 239000003125 aqueous solvent Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/38—Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
- B01D71/381—Polyvinylalcohol
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
PURPOSE:To obtain a dry membrane simply at low cost by coating a substrate with a dope solution containing a copolymer, immersing the substrate in water to obtain a wet membrane, separating the wet membrane from the substrate and drying the membrane without causing shrinkage. CONSTITUTION:A substrate is coated with a dope solution containing 10-40% by weight of ethylene-vinyl alcohole copolymer having ethylene content of 10- 60mol%. The resulting substrate is immersed in water or aqueous solvent at a temperature of -5-10 deg.C to obtain a wet membrane having an average pore size of below 0.1mu. The wet membrane is separated from the substrate, placed in a frame to prevent shrinkage, and dried at a temperature of 10-40 deg.C. A preferred solvent for the dope solution is dimethyl sulfoxide or a mixture of dimethyl sulfoxide and water. It is possible to produce a composite membrane by using a porous non-woven fabric sheet or a non-woven fabric tube as the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14440478A JPS5570304A (en) | 1978-11-22 | 1978-11-22 | Production of dry membrane with selective permeability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14440478A JPS5570304A (en) | 1978-11-22 | 1978-11-22 | Production of dry membrane with selective permeability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5570304A true JPS5570304A (en) | 1980-05-27 |
Family
ID=15361375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14440478A Pending JPS5570304A (en) | 1978-11-22 | 1978-11-22 | Production of dry membrane with selective permeability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5570304A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679149A (en) * | 1992-05-13 | 1994-03-22 | Pall Corp | Wet-dry reversible ultrafiltering membrane capable of integrity testing and testing method thereof |
| JPH08255867A (en) * | 1996-03-11 | 1996-10-01 | Hitachi Ltd | Surface mount ic |
-
1978
- 1978-11-22 JP JP14440478A patent/JPS5570304A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679149A (en) * | 1992-05-13 | 1994-03-22 | Pall Corp | Wet-dry reversible ultrafiltering membrane capable of integrity testing and testing method thereof |
| JPH08255867A (en) * | 1996-03-11 | 1996-10-01 | Hitachi Ltd | Surface mount ic |
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