친수성 포스파젠 고분자를 이용한 금속 이온 분리막 제조에 관한 연구

권석기; 이병철

Journal of the Korean Industrial and Engineering Chemistry, Vol.10, No.3, 445-449, May, 1999

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친수성 포스파젠 고분자를 이용한 금속 이온 분리막 제조에 관한 연구

A Study on the Preparation of Metal-Ion Separation Membrane with Hydrophilic Polyphosphazenes

권석기, 이병철

초록

소수성인 poly[bis(trifluoroethoxy)phosphazene]에 methoxyethylenoxy 측쇄를 치환시켜 친수성을 증가시킨 포스파젠 고분자를 합성하였으며 합성된 고분자를 다공성 polypropylene 지지체위에 dip-coating법으로 금속이온 분리막을 제조하였다. Cr³⁺, Co²⁺, Mn²⁺이온 수용액에 대한 분리실험을 25℃에서 60℃까지 온도범위에서 행하였다. 치환된 methoxyethylenoxy기 중의 ethylenoxy의 반복단위가 증가할수록 이온의 투과특성이 증가하는 것을 알 수 있었다. Trifluoroethoxy methoxyethoxyethoxyethoxy co-substituted polyphosphazene의 경우 Cr³⁺ 이온의 60℃에서 분리계수 4.5의 값을 갖고 Co²⁺, Mn²⁺이온들로부터 분리가 됨을 알 수 있었다.

Hydrophilic polyphosphazenes were synthesized from hydrophobic polyphosphazenes by adding methoxyethylenoxy side chains and cast by dip-coating method into membranes supported on porous polypropylene mesh filter sheet for metal separation testing. A solution of Cr³⁺, Co²⁺, Mn²⁺ nitrates was used in diffusion experiments which were conducted from 25℃ to 60℃. It was found that the ion transport properties were increased as the repeating number of ethylenoxy side chain increased. Membrane from trifluoroethoxy methoxyethoxyethoxyethoxy co-substituted polyphosphazenes was found to separate Cr³⁺ ion from Mn²⁺ and Co²⁺ ions with separation factor of 4.5 at 60℃.

Keywords:Polyphosphazenes;Membrane;Metal-Ion;Separation

[References]

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McCaffery RR, McAttee RE, Grey AE, Allen CA, Cummings DG, Appelhans AD, J. Membr. Sci., 28, 47 (1986)
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[1] Allcock HR, Acc. Chem. Res., 12, 351 (1979)

[2] Allcock HR, Chem. Rev., 72, 315 (1972)

[3] Allcock HR, Chem. Eng. News, 63, 22 (1985)

[4] Allcock HR, Kwon S, Macromolecules, 19, 1502 (1986)

[5] Allcock HR, Kwon S, Macromolecules, 21, 1980 (1988)

[6] Allcock HR, Gebura M, Kwon S, Neenan TX, Biomaterials, 9, 500 (1988)

[7] Allcock HR, Kwon S, Macromolecules, 22, 75 (1989)

[8] Allen CA, Cummings DG, McCaffrey RP, J. Membr. Sci., 43, 217 (1989)

[9] Allcock HR, Kwon S, Biomaterials, 19(6), 1508 (1986)

[10] Allcock HR, Kwon S, U.S. Patent, 4,880,622 (1988)

[11] Wycisk R, Pintauro PN, J. Membr. Sci., 119(1), 155 (1996)

[12] Allcock HR, Dudley GK, Macromolecules, 29(4), 1313 (1996)

[13] Allcock HR, Napierala ME, Cameron CG, Oconnor SJ, Macromolecules, 29(6), 1951 (1996)

[14] Kwon SK, Lee BC, J. Korean Ind. Eng. Chem., 9(3), 435 (1998)

[15] Allcock HR, Kwon S, U.S. Patent, 5,053,451 (1991)

[16] McCaffery RR, McAttee RE, Grey AE, Allen CA, Cummings DG, Appelhans AD, J. Membr. Sci., 28, 47 (1986)

[17] Allcock HR, Oconnor SJ, Olmeijer DL, Napierala ME, Cameron CG, Macromolecules, 29(23), 7544 (1996)

[18] Allcock HR, Kuharcik SE, Reed CS, Napierala ME, Macromolecules, 29(10), 3384 (1996)

[19] Crank J, Mathematics of Diffusion, Oxford University Press, London, England (1964)

[20] Early JE, Cannon RD, Aqueous Chemistry of Chromium(III), Transition Met. Chem., 1 (1965)