Mutual diffusion coefficients and resistance coefficients for aqueous solutions of sodium alkanoate surfactants

被引:27
作者
Deng, ZP [1 ]
Lu, H [1 ]
Leaist, DG [1 ]
机构
[1] UNIV WESTERN ONTARIO,DEPT CHEM,LONDON,ON N6A 5B7,CANADA
关键词
D O I
10.1021/je950234b
中图分类号
O414.1 [热力学];
学科分类号
摘要
Taylor dispersion is used to measure mutual diffusion coefficients (D) for binary aqueous solutions of sodium hexanoate, heptanoate, octanoate, decanoate, and dodecanoate salts at 25 degrees C. The diffusion coefficients of sodium hexanoate and heptanoate drop smoothly as the salt concentration is raised. For each of the longer-chain sodium alkanoates, D drops sharply in the region of the critical micelle concentration. Activity coefficient data are used to calculate resistance coefficients from the diffusion results. For aqueous sodium decanoate, micellar aggregation produces a 4-fold decrease in the friction acting on the diffusing salt. The mutual diffusion coefficient of aqueous sodium octanoate is compared with previously reported intradiffusion coefficients for sodium and octanoate ions.
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页码:214 / 217
页数:4
相关论文
共 25 条
[1]   H-1-NMR SELF-DIFFUSION AND MULTIFIELD H-2 SPIN RELAXATION STUDY OF MODEL ASSOCIATIVE POLYMER AND SODIUM DODECYL-SULFATE AGGREGATION IN AQUEOUS-SOLUTION [J].
ABRAHMSENALAMI, S ;
STILBS, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (25) :6359-6367
[2]   CONDUCTANCES AND SURFACE TENSIONS OF AQUEOUS SOLUTIONS OF SODIUM DECANOATE SODIUM LAURATE AND SODIUM MYRISTATE AT 25 DEGREES AND 35 DEGREES [J].
CAMPBELL, AN ;
LAKSHMIN.GR .
CANADIAN JOURNAL OF CHEMISTRY-BACK YEAR, 1965, 43 (06) :1729-+
[3]  
DELISI R, 1981, CAN J CHEM, V59, P1865
[4]   SURFACTANT DIFFUSION - NEW RESULTS AND INTERPRETATIONS [J].
EVANS, DF ;
MUKHERJEE, S ;
MITCHELL, DJ ;
NINHAM, BW .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1983, 93 (01) :184-204
[5]   DIFFUSION WITH MOLECULAR ASSOCIATION IN CHLOROFORM + TRIETHYLAMINE AND CHLOROFORM + DIOXANE MIXTURES [J].
LEAIST, DG .
JOURNAL OF SOLUTION CHEMISTRY, 1992, 21 (10) :1035-1050
[6]   UNUSUAL THERMAL-DIFFUSION OF IONIC SURFACTANTS NEAR THE CRITICAL MICELLE CONCENTRATION [J].
LEAIST, DG ;
HUI, L .
JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (22) :7547-7549
[7]  
LEAIST DG, 1991, J CHEM SOC FARADAY T, V76, P597
[8]  
LEAIST DG, 1986, J COLLOID INTERF SCI, V55, P230
[9]   TRANSLATIONAL MOTION IN AQUEOUS SODIUM OCTANOATE SOLUTIONS [J].
LINDMAN, B ;
BRUN, B .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1973, 42 (02) :388-399
[10]   TRANSLATIONAL DIFFUSION AND SOLUTION STRUCTURE OF MICRO-EMULSIONS [J].
LINDMAN, B ;
KAMENKA, N ;
KATHOPOULIS, TM ;
BRUN, B ;
NILSSON, PG .
JOURNAL OF PHYSICAL CHEMISTRY, 1980, 84 (19) :2485-2490