Abstract
The aggregation of dodecyltrimethylammonium hydroxide (DTAOH) aqueous solutions has been studied by several methods. It is stepwise and four critical points were found. AtC T=(2.51±0.10)×10−4 mol · dm−3 the surface excess becomes zero, atC T=(1.300±0.041)×10−3 mol · dm−3 small aggregates from, which grow with concentration. AtC T=(1.108±0.010)×10−2 mol · dm−3 true micelles form (CMC) and at (3.02±0.28)×10−2 mol · dm−3 the structure of micelles probably changes affecting their properties. The DTAOH micelles are highly ionized (α=0.8) at the CMC, and decreases to reach very small values when the total concentration increases.
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Schulz, P.C., Morini, M.A., Minardi, R.M. et al. The aggregation in dodecyltrimethylammonium hydroxide aqueous solutions. Colloid Polym Sci 273, 959–966 (1995). https://doi.org/10.1007/BF00660374
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DOI: https://doi.org/10.1007/BF00660374