International Scholarly Research Notices

Research Article

Thermodynamic and Interfacial Properties of DTABr/CTABr Mixed Surfactant Systems in Ethanolamine/Water Mixtures: A Conductometry Study

Table 2

The degree of counterion binding, thermodynamic function, micellar composition, interaction parameters, and critical micelle concentration of the DTABr + CTABr in 0.2% ethanolamine.


Temp (K)		β	(J/mol)	(J/mol)	(J/molK)	(J/mol)					cmc* (mM)

298.1	0.1	0.67	−2406.7	−2406.7	4.18	−3625.4	0.202	−6.03	0.021	0.783	0.625
	0.2	0.66	−2333.7	−2333.7	4.45	−3660.0	0.227	−5.37	0.040	0.759	0.667
	0.3	0.56	−2091.9	−2091.9	4.58	−3448.8	0.237	−4.67	0.066	0.769	0.755
	0.4	0.54	−2257.3	−2257.3	4.82	−3694.6	0.267	−4.65	0.081	0.718	0.789
	0.5	0.53	−2333.4	−2333.4	5.02	−3830.2	0.292	−4.55	0.102	0.678	0.865
	0.6	0.50	−2262.3	−2262.3	5.17	−3802.6	0.313	−4.25	0.134	0.660	1.019
303.1	0.1	0.75	−2769.9	−2769.9	4.34	−4084.9	0.216	−6.49	0.019	0.739	0.579
	0.2	0.71	−2607.5	−2607.5	4.56	−3988.3	0.237	−5.72	0.036	0.725	0.618
	0.3	0.63	−2577.3	−2577.3	4.75	−4017.9	0.259	−5.33	0.053	0.699	0.667
	0.4	0.71	−2423.0	−2423.0	4.87	−3899.5	0.273	−4.85	0.077	0.697	0.761
	0.5	0.57	−2480.9	−2480.9	5.06	−4013.3	0.297	−4.72	0.097	0.659	0.835
	0.6	0.53	−2296.2	−2296.2	5.17	−3861.9	0.313	−4.23	0.135	0.660	1.021
308.1	0.1	0.73	−3124.3	−3124.3	4.47	−4500.8	0.228	−6.92	0.016	0.697	0.537
	0.2	0.66	−2973.0	−2973.0	4.69	−4416.6	0.251	−6.17	0.031	0.677	0.571
	0.3	0.64	−2760.1	−2760.1	4.80	−4240.4	0.265	−5.54	0.051	0.678	0.641
	0.4	0.62	−3011.7	−3011.7	5.05	−4565.9	0.295	−5.65	0.060	0.611	0.646
	0.5	0.58	−2757.3	−2757.3	5.12	−4335.5	0.306	−5.07	0.087	0.621	0.775
	0.6	0.56	−2488.2	−2488.2	5.21	−4092.4	0.319	−4.47	0.126	0.634	0.971
313.1	0.1	0.70	−2911.6	−2911.6	4.36	−4276.6	0.218	−6.56	0.018	0.732	0.572
	0.2	0.66	−2766.9	−2766.9	4.59	−4203.6	0.241	−5.82	0.035	0.714	0.607
	0.3	0.59	−2700.0	−2700.0	4.77	−4192.6	0.260	−5.39	0.052	0.694	0.660
	0.4	0.61	−2732.6	−2732.6	4.95	−4282.3	0.283	−5.18	0.069	0.661	0.712
	0.5	0.53	−2716.9	−2716.9	5.09	−4313.6	0.303	−4.92	0.091	0.635	0.796
	0.6	−	−	−	−	−	−	−	−	−	−

Critical micellar concentration.