Research Article

An Interaction of Anionic- and Cationic-Rich Mixed Surfactants in Aqueous Medium through Physicochemical Properties at Three Different Temperatures

Table 3

Viscous relaxation time (/ps) of SDS-rich and DTAB-rich surfactants in the aqueous medium at three different temperatures T = 293.15, 298.15, and 303.15 K and at 0.1 MPa.

M (mol·L−1)293.15 K298.15 K303.15 K
SDS-rich

0.0050006.22E 075.74E − 072.95E 07
0.0000969.08E − 075.53E 078.14E 07
0.0002408.10E 075.66E 073.42E 07
0.0004801.11E 065.62E 075.73E 07
0.0006727.97E 074.76E 073.95E 07
0.0007926.59E 077.05E 073.55E 07
0.0009606.87E 075.97E 072.35E 07
0.0060116.37E 076.64E 072.26E 07
0.0072007.87E 076.70E 072.37E 07
0.0079208.29E 078.40E 072.48E 07
0.0090007.78E 078.15E 072.29E 07
0.0108008.29E 076.71E 073.94E 07
0.0120007.58E 071.40E 062.60E 07
DTAB-rich
0.0100006.58E 076.34E 072.25E 07
0.0008644.54E 073.79E 071.62E 06
0.0009604.79E 075.09E 071.87E 06
0.0015364.90E 074.09E 071.89E 06
0.0020164.63E 076.34E 071.86E 06
0.0024964.55E 071.04E 062.41E 06
0.0029764.84E 071.33E 064.52E 06
0.0032644.70E 072.02E 061.55E 06
0.0036005.26E 072.34E 077.38E 07
0.0050406.38E 074.01E 072.11E 06

M (mol·L−1) is SDS and DTAB molarity in solvents (±3 × 10−4 mol·L−1) and standard uncertainties u are u(m) = 0.00001 mol·L−1, u(T) = ±0.01 K, and u(p) = ±0.01 MPa, and the expanded uncertainties, Uc (0.95 confidence level), is Uc(τ) = ±0.003 ps (0.95 level of confidence).