II.skin layer의 density변화에 의한 물-이소프로판을 혼합액의 투과증발

김상균; 제강종건; 이규호

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.5, 853-859, October, 1997

Study on the Pervaporation Characteristic of Water-alcohol Mixtures through Aromatic Polyetherimide Membranes : II. the Pervaporation of Water-isopropanol Mixtures by the Density Change of Skin Layer

김상균, 제강종건, 이규호

초록

표면층에 치밀층 구배 구조를 갖는 비대칭 폴리에테르이미드막에 대하여 치밀 구조층의 화학적 개질을 통한 막 형태의 변화와 물/이소프로판올 혼합액의 투과증발 거동을 연구하였다. 치밀 정도는 증발 시간에 의해 조절되었고, 증발 시간이 0분에서 4분으로 증가되었을 때, 투과량은 감소하였고, 선택도는 증가하였다. 또한, 수산화나트륨 용액으로 개질 된 폴리에테르이미드막을 통한 투과증발 거동은, 치밀 표면층의 개질 시간이 증가될수록 선택성은 증가하였고, 투과량은 감소하였다. 전자현미경으로 확인된 형태 변화는 개질 시간의 증가에 따라 치밀 표면층의 density 증가를 보여주었고, 이러한 결과는 위의 관찰들과 일치하였다.

For asymmetric polyetherimide membranes having a dense layer gradient structure on the skin layer, the morphology change and pervaporation behaviors of water/isopropanol mixture through chemical modification of dense skin layer investigated. The extent of the density was controlled by the evaporatior, time, and when the evaporation time was increased from 0 min to 4 min, the permeation flux was decreased, the separation factor was increased. Also, the prevaporation behaviors of the polyetherimide membranes modified with sodium hydroxide solution, as the modification time of dense skin layer increased, the selectivity increased, and the permeation flux decreased. The morphology change indentified by SEM shows that the density of dense skin layer tends to increase with increasing modification time, this result is consistent with above observations

[References]

Zhang SM, Drioli E, Sep. Sci. Technol., 30(1), 1 (1995)
Koenhen DM, Mulder MHV, Smolders CA, J. Appl. Polym. Sci., 21, 199 (1977)
Mulder MHV, Oude Hendrikman J, Wijmans JG, Smolders CA, J. Appl. Polym. Sci., 30, 2805 (1985)
Huang RYM, Feng X, Sep. Sci. Technol., 28, 2035 (1993)
Feng XS, Huang RY, J. Membr. Sci., 109(2), 165 (1996)
Yoshikawa Y, Yamamoto Y, Mastumoto K, Maku., 18, 189 (1993)
Yanagishita H, Maejima C, Kitamoto D, Nakane T, J. Membr. Sci., 86(3), 231 (1994)
Yanagishita H, Nakane T, Nozoye H, Yoshitome H, J. Appl. Polym. Sci., 49, 256 (1992)
Matsuura T, CRC Press, Boca Raton, FL (1994)
Fang Y, Pham VA, Matsuura T, Santerre JP, Narbaitz RM, J. Appl. Polym. Sci., 54(12), 1937 (1994)
Iwatw N, Kato S, Noritomi H, Nagahama K, Kusuki Y, Kag. Kog. Ronbunshu, 19, 404 (1993)
Tanihara N, Tanaka K, Kita H, Okamoto K, Nakamura A, Kusuki Y, Nakagawa K, J. Chem. Eng. Jpn., 25, 387 (1992)
Bai I, Fouda AE, Matsuura T, Hazlett JD, J. Appl. Polym. Sci., 48, 999 (1993)

[Referenced By]

[1] Zhang SM, Drioli E, Sep. Sci. Technol., 30(1), 1 (1995)

[2] Koenhen DM, Mulder MHV, Smolders CA, J. Appl. Polym. Sci., 21, 199 (1977)

[3] Mulder MHV, Oude Hendrikman J, Wijmans JG, Smolders CA, J. Appl. Polym. Sci., 30, 2805 (1985)

[4] Huang RYM, Feng X, Sep. Sci. Technol., 28, 2035 (1993)

[5] Feng XS, Huang RY, J. Membr. Sci., 109(2), 165 (1996)

[6] Yoshikawa Y, Yamamoto Y, Mastumoto K, Maku., 18, 189 (1993)

[7] Yanagishita H, Maejima C, Kitamoto D, Nakane T, J. Membr. Sci., 86(3), 231 (1994)

[8] Yanagishita H, Nakane T, Nozoye H, Yoshitome H, J. Appl. Polym. Sci., 49, 256 (1992)

[9] Matsuura T, CRC Press, Boca Raton, FL (1994)

[10] Fang Y, Pham VA, Matsuura T, Santerre JP, Narbaitz RM, J. Appl. Polym. Sci., 54(12), 1937 (1994)

[11] Iwatw N, Kato S, Noritomi H, Nagahama K, Kusuki Y, Kag. Kog. Ronbunshu, 19, 404 (1993)

[12] Tanihara N, Tanaka K, Kita H, Okamoto K, Nakamura A, Kusuki Y, Nakagawa K, J. Chem. Eng. Jpn., 25, 387 (1992)

[13] Bai I, Fouda AE, Matsuura T, Hazlett JD, J. Appl. Polym. Sci., 48, 999 (1993)