PE계 불균질 양이온 교환막의 제조와 특성:2.후처리에 따른 특성 변화

양현수; 조병하; 김웅기; 이창소

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.1, 67-75, February, 1997

Export Citation

PE계 불균질 양이온 교환막의 제조와 특성:2.후처리에 따른 특성 변화

Preparation and Characteristics of Heterogeneous Cation Exchange Membrane : 2.Characteristics Change on Post-treatment

양현수, 조병하, 김웅기, 이창소

초록

LLDPE와 미분말 상태인 강산성 양이온 교환 수지를 사용하여 압출기를 통해 막상으로 성형한 후 증류수와 NaCl 포화 수용액상에서 후처리하여 불균질 양이온 교환막을 제조하고 특성화하였다. 증류수 및 NaCl 포화 수용액 중에서 후처리를 통하여 양이온 교환 수지 입자가 함수, 팽윤되어 폴리에틸렌과 이온 교환 수지 사이에 cavity가 발생하며 동시에 양이온 교환 수지의 팽윤 압력에 의해 결합제에 큰 힘이 작용하기 때문에 폴리에틸렌에 micro-crack이 생성되므로 전기 화학적, 물리적 특성 값이 향상되었다. 또한 후처리 시간 30분과 후처리 온도 90℃에서 최적의 조건을 갖는 우수한 불균질 양이온 교환막이 제조되었다.

Heterogeneous cation exchange membrane consisting of cation exchange resin particles (diameter of less than 149μ) which are finely dispersed in a polyethylene matrix, were produced as forms of sheet. The characteristics were measured after treating hot water or saturated sodium chloride. When membranes were treated with hot water or saturated sodium chloride, cation exchange resin particles swell and expand pushing away the polyethylene matrix of membranes. The above treatment results the formation of narrow cavities between a cation exchange resin particles and polyethylene matrix, and the formation of fine micro-cracks on the polyethylene matrix. Thus, we were obtained good physical and electrochemical properties. On the treatment with hot water or saturated sodium chloride, the optimum conditions for good heterogeneous cation exchange membrane were treatment time of 30min and treatment temperature of 90℃.

[References]

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[1] Noble RD, Stern SA, "Membrane Seperations Technology," (1995)

[2] Hwang ST, Kammermeyer K, "Membranes in Seperation," (1984)

[3] Juda W, McRae WA, J. Am. Chem. Soc., 72, 1044 (1950)

[4] Juda W, McRae WA, U.S. Patent, 2,636,851 (1953)

[5] Ganzi GC, AIChE Symp. Ser., 84, 261 (1988)

[6] Oren Y, Egozy Y, Desalination, 86, 155 (1992)

[7] Molau GE, J. Membr. Sci., 8, 309 (1981)

[8] Giuffrida, "Heterogeneous Membrane and Method," PCT Int. Appl WO 94. 06, 850 (1994)

[9] ASTM D638-94b

[10] Sata T, Izou R, Colloid Polym. Sci., 256, 757 (1978)

[11] Simon GP, Desalination, 59, 61 (1986)

[12] Bauer B, Strathmann H, Effenberger F, Desalination, 79, 125 (1990)

[13] Hirata Y, Yamamoto Y, Date M, Yamauchi A, Kimizuka H, J. Membr. Sci., 41, 177 (1989)