Understanding surface excess and structure of cationic surfactants at alumina interfaces
This proposal seeks to determine the explanation of a pronounced maximum in the surface excess observed at a solid/liquid interface by studying systematically the effects of pH on aqueous solutions of alkyl trimethyl ammonium bromide (CnTAB) surfactants against sapphire substrates. This is thought to arise from the balance of different influences on adsorption such as electrostatic attraction to the surface, repulsion between charged adsorbates and the solvent interactions that can cause a rich variety of behaviour. T he new data will allow sensitive tests of models of adsorption that depend on ionic association and surface potential close to the critical micelle concentration.
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RENNIE Adrian R.; BARKER Robert; HELLSING Maja; LI Peixun and THOMAS Robert K.. (2014). Understanding surface excess and structure of cationic surfactants at alumina interfaces. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1357
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