Abstract
The inclusion complex formed by β-cyclodextrin (β-CD) with the cationic surfactant hexadecyltrimethylammonium chloride (HTAC) was studied by viscometry using poly(ethylene oxide) (PEO)–HTAC aggregates as a viscosity indicator. The relative viscosity of β-CD in aqueous PEO–HTAC solution profiles shows that the formation of the β-CD/HTAC inclusion complex causes HTAC molecules to be stripped off the PEO chains, resulting in a decrease of aqueous solution viscosity as a result of the decrease in electrostatic repulsion between polymer-bound HTAC micelles. The viscosity minimum at C β-CD/C HTAC = 0.5 indicates that the molecular ratio of host molecule to guest molecule is 1:2 in the β-CD/HTAC inclusion complex.
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This work received financial support from Anhui Province College Natural Science Foundation (KJ2013A065); National College Students’ Innovation and Entrepreneurship Training Plan Project (201410878065).
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Chen, X. Viscometric Study of the Inclusion Complex Between β-Cyclodextrin and HTAC in Aqueous Solution. J Surfact Deterg 18, 597–601 (2015). https://doi.org/10.1007/s11743-015-1687-5
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DOI: https://doi.org/10.1007/s11743-015-1687-5