w-Phenylalkylammonium Salt의 수용액에서 Sodium Dodecyl Sulfate의 미셀에 관한 연구

류연호; 오정희

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.6, 1041-1047, December, 1997

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w-Phenylalkylammonium Salt의 수용액에서 Sodium Dodecyl Sulfate의 미셀에 관한 연구

A Study on the Micellization of Sodium Dodecyl Sulfate in ω-Phenylakylammonium Salt Solution

류연호, 오정희

초록

ω-Phenylalkylamine salt의 존재하에서 sodium dodecyl sulfate (SDS)의 임계 미셀농도(CMC)를 전기전도도법으로 구하였다. 유기염의 alky기의 길이가 길어짐에 따라 CMC는 감소하는 경향을 보여주었다. 유기첨가제의 존재하에서 18℃-50℃의 온도 범위에서 SDS의 미셀화 과정에 수반되는 열역학적 파라메터를 구하였다. 이 온도 범위에서 SDS의 미셀화 자유에너지 (ΔG_m⁰는 음의 값을 나타내며 미셀화 엔트로피(ΔS_m⁰)는 큰 양의 값을 나타내었으며 미셀화 엔탈피(ΔH_m⁰)는 낮은 온도(18℃)에서는 양의 값을 나타내지만 높은 온도(>25℃)에서는 음의 값을 나타내었다. 미셀화는 자발적인 상전이 현상임을 알 수 있었다. 이들 열역학적 파라메터들은 유기염의 소수성 부분의 길이가 길어짐에 따라 감소하는 경향을 보여주었다. 비전도도 값의 차(Δκ)가 유기염의 mol 비가 증가할수록 큰 값을 나타내었다. 그러므로 유기염의 소수성 부분의 길이가 길어질수록 유기염들은 더 쉽게 SDS 미셀내의 palisade층까지 깊이 침투하여 안정한 혼합 미셀을 형성함을 알 수 있었다.

The influence of ω-phenylalkylammonium salt on the critical micelle concentration (CMC) of SDS has been examined using the electric conductivity method. CMC of SDS exhibited the tendency to decrease with the length of alkyl group of additives. The effect of temperature on CMC of SDS in additive solutions has been observed in the range of 18℃-50℃. The free energy(ΔG_m⁰) for the micellization of SDS is negative and the entropy(ΔS_m⁰) is a large positive value. The enthalpy(ΔH_m⁰ is positive in low temperature(18℃) and negative in high temperature(>25℃). In the prensence of organic additives, the micellization of SDS was considered as a spontaneous process and to involve a phase transition. The values of ΔG_m⁰ has shown the tendency to increase but the values of ΔS_m⁰ and ΔH_m⁰ to decrease with the length of alklyl group of additive salts. The changes in Δκ(difference of specific conductivity) with increasing mole ratio of additives in the mixed solutions indicated the formation of mixed micelles between SDS and additives. The effect of the length of alkyl chain on the micellization of SDS demonstrated the penetration of organic additives into the palisade layer of the SDS micelle.

[References]

Varadaraj R, Bock J, Zushma S, Brons N, Colletti T, J. Colloid Interface Sci., 147, 387 (1991)
Bachofer SJ, Turbitt RM, J. Colloid Interface Sci., 135, 325 (1990)
Treiner C, J. Colloid Interface Sci., 90, 444 (1982)
Singh HN, Swarup S, J. Colloid Interface Sci., 91, 256 (1983)
Zana R, Picot C, Duplessix R, J. Colloid Interface Sci., 93, 43 (1983)
Rao V, Ruckenstein E, J. Colloid Interface Sci., 113, 375 (1986)
Manabe M, Kawamura H, Yamashita A, Tokunaga S, J. Colloid Interface Sci., 115, 147 (1987)
Oh JH, J. Korean Soc. Anal. Sci., 8, 107 (1995)
Park JH, Oh JH, J. Natural Sci. Sejong Univ., 1, 29 (1994)
Bachofer SH, Simonis U, Nowiski TA, J. Phys. Chem., 95, 480 (1991)
Klevens HB, J. Phys. Colloid Chem., 54, 1012 (1950)
Klevens HB, J. Phys. Colloid Chem., 52, 130 (1948)
Lee BH, J. Korean Chem. Soc., 38, 539 (1994)
Sharma B, Rakshit AK, J. Colloid Interface Sci., 129, 139 (1989)
Rakshit AK, Narayan S, Ind. J. Chem., A25, 95 (1986)
de la Ossa EM, Flores V, Tenside Surfactants Detergents, 24, 38 (1987)
Clint JH, Walker T, J. Chem. Soc.-Faraday Trans., 7, 946 (1975)
Lipka J, "Graphical and Mechanical Computation," Wiley, New York, p. 30-32 (1918)
Marrignau J, Basseraua P, Delord P, J. Phys. Chem., 90, 645 (1986)
Tanaka M, Kaneshina S, J. Colloid Interface Sci., 44, 525 (1973)
Parker WO, J. Phys. Chem., 95, 5329 (1991)
Unerwood AL, Anacker EW, J. Phys. Chem., 88, 2390 (1984)
Barry BW, Gray GHT, J. Colloid Interface Sci., 52, 314 (1975)
Barry BW, Gray GHT, J. Colloid Interface Sci., 52, 327 (1975)

[Referenced By]

[1] Varadaraj R, Bock J, Zushma S, Brons N, Colletti T, J. Colloid Interface Sci., 147, 387 (1991)

[2] Bachofer SJ, Turbitt RM, J. Colloid Interface Sci., 135, 325 (1990)

[3] Treiner C, J. Colloid Interface Sci., 90, 444 (1982)

[4] Singh HN, Swarup S, J. Colloid Interface Sci., 91, 256 (1983)

[5] Zana R, Picot C, Duplessix R, J. Colloid Interface Sci., 93, 43 (1983)

[6] Rao V, Ruckenstein E, J. Colloid Interface Sci., 113, 375 (1986)

[7] Manabe M, Kawamura H, Yamashita A, Tokunaga S, J. Colloid Interface Sci., 115, 147 (1987)

[8] Oh JH, J. Korean Soc. Anal. Sci., 8, 107 (1995)

[9] Park JH, Oh JH, J. Natural Sci. Sejong Univ., 1, 29 (1994)

[10] Bachofer SH, Simonis U, Nowiski TA, J. Phys. Chem., 95, 480 (1991)

[11] Klevens HB, J. Phys. Colloid Chem., 54, 1012 (1950)

[12] Klevens HB, J. Phys. Colloid Chem., 52, 130 (1948)

[13] Lee BH, J. Korean Chem. Soc., 38, 539 (1994)

[14] Sharma B, Rakshit AK, J. Colloid Interface Sci., 129, 139 (1989)

[15] Rakshit AK, Narayan S, Ind. J. Chem., A25, 95 (1986)

[16] de la Ossa EM, Flores V, Tenside Surfactants Detergents, 24, 38 (1987)

[17] Clint JH, Walker T, J. Chem. Soc.-Faraday Trans., 7, 946 (1975)

[18] Lipka J, "Graphical and Mechanical Computation," Wiley, New York, p. 30-32 (1918)

[19] Marrignau J, Basseraua P, Delord P, J. Phys. Chem., 90, 645 (1986)

[20] Tanaka M, Kaneshina S, J. Colloid Interface Sci., 44, 525 (1973)

[21] Parker WO, J. Phys. Chem., 95, 5329 (1991)

[22] Unerwood AL, Anacker EW, J. Phys. Chem., 88, 2390 (1984)

[23] Barry BW, Gray GHT, J. Colloid Interface Sci., 52, 314 (1975)

[24] Barry BW, Gray GHT, J. Colloid Interface Sci., 52, 327 (1975)