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다층복합막의 공기분리 특성에 관한 연구
A Study on the Air Separation Properties of Multilayer Composite Membranes
HWAHAK KONGHAK, October 1994, 32(5), 627-635(9), NONE
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Abstract
공기분리용 고분자 다층복합막을 제조하였다. 코팅물질로는 poly(dimethylsiloxane)과 poly-4-methyl-pen-tene이 사용되었다. 다공성 지지체로는 polysulfone 막이 사용되었다. 제조된 막에 대해 압력 및 코팅층의 두께비 변화에 따른 산소와 질소의 투고실험을 행하였고 이를 저항모델에 적용하여 막의 구조, 투과도와 선택도 사이의 관계를 해석하였다. 저항모델로 예측된 투과도 계수와 ideal separation factor 값은 실험치와 대체로 일치하였다. 막양단의 압력차가 5kgf/㎠ 이고 cut의 값이 0.05인 조건으로 ideal separation factor의 값이 3.4인 3층 복합막에 공기를 통과시킴으로서 약 34.5%의 산소부화공기를 얻을 수 있었고, 이 때 산소에 대한 투과도는 1.9X10-5[㎤(STP)/㎠.sec.cmHg] 이었다.
Multilayer types of thin film composite(TFC) membranes were prepared. Poly(dimethylsiloxane)and poly-4-methyl-1-pentene were used as a coating material and polysulfone was used for a porous support membrane. Permeation data of oxygen and nitrogen through TFC membranes at different pressure and thickness ratio of coating layer were obtained and the relationship between structure of membranes, permeability and selectivity were analyzed by applying resistance model. The values of permeability coefficient and ideal separation factor predicted by resistance model were well fitted with the experimental data. Oxygen was enriched up to 34.5% in the permeate stream under the condition that pressure difference and cut were 5kg/㎠ and 0.05 respectively. The ideal separation factor of this three-layer TFC membrane was 3.4 and the permeability of oxygen was 1.9X10-5 [㎤(STP)/㎠.sec.cmHg].
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Henis JMS, Tripodi MK, U.S. Patent, 4,230,463 (1988)
Henis JMS, Tripodi MK, J. Membr. Sci., 8, 233 (1981)
Henis JMS, Tripodi MK, Science, 11, 220 (1983)
Lopez JL, Matson SL, Marchese J, J. Membr. Sci., 27, 301 (1986)
Lundy Ka, Cabasso I, Ind. Eng. Chem. Res., 28, 742 (1989)
Song SW, Kim JJ, Kim UY, HWAHAK KONGHAK, 24(5), 423 (1986)
Stern SA, Fang SM, Frisch HL, J. Polym. Sci. A-2, 10, 201 (1972)
Stern SA, Chapter 8 in "Membrane Separation Processes," Mears, P. ed., Elsevier, Amsterdam (1976)
Ward WJ, Browall WR, J. Membr. Sci., 1, 99 (1976)
Ward WJ, U.S. Patent, 4,279,855 (1981)
Kesting RE, "Synthetic Polymeric Membranes," McGraw-Hill, N.Y. (1971)
Lonsdale HK, J. Membr. Sci., 10, 81 (1982)
Lonsdale HK, Polym. Eng. Sci., 25, 1074 (1985)
