Enrichment of helium by asymmetric hollow-fiber membrane of cellulose triacetate
β Scribed by H. Kumazawa; E. Sada; K. Nakata; N. Kawashima; S. Kataoka; K. Tada
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 443 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0021-8995
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Homogeneous cellulose triacetate membranes were prepared by the solution-casting method. The surface of this membrane was modified with gaseous plasma of a 10-W discharge power in the presence of ammonia gas at 0.15 Torr pressure. The percentage of weight loss of the CTA membranes was found to be 0.
## Abstract Polysulfone (PSf) asymmetric hollowβfiber membranes, which have a dense outer layer but a loose inner layer, were tentatively fabricated by coextrusion through a tripleβorifice spinneret and a dry/wetβphase inversion process. Two simple polymer dopes were tailored, respectively, for the