Abstract
A series of long-chain quaternary ammonium hydroxides were synthesized from tertiary amines and confirmed by 1H NMR and FTIR. Surface properties and pH of these surfactants were investigated. The critical micelle concentrations (CMC) of the synthesized quaternary ammonium hydroxides are lower than the conventional quaternary ammonium surfactants. The micelles shapes of these long-chain quaternary ammonium hydroxides in aqueous solution are spherical at a concentration of 0.1 mol/L. The pH values of the synthesized quaternary ammonium hydroxides are 12.25–12.51.
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