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dc.contributor.authorLe, Ngoc Thu
dc.contributor.authorPhan, Chi
dc.contributor.authorNguyen, A.
dc.contributor.authorAng, Ming
dc.date.accessioned2017-01-30T15:09:20Z
dc.date.available2017-01-30T15:09:20Z
dc.date.created2015-03-03T20:16:36Z
dc.date.issued2012
dc.identifier.citationLe, N.T. and Phan, C. and Nguyen, A. and Ang, M. 2012. An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface. Minerals Engineering. 39: pp. 255-261.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/43706
dc.identifier.doi10.1016/j.mineng.2012.06.003
dc.description.abstract

Flotation collectors and frothers are known to synergistically adsorb at the air–water interface and reduce surface tension. Here we report an unusual synergistic adsorption of cetyl trimethyl ammonium bromide (CTAB) and methyl isobutyl carbinol (MIBC), which unexpectedly increase surface tension. The available models fail to describe the unusual increase in surface tension. A polynomial was used to empirically model the increased surface tension over entire range of mixture concentration and identify the synergistic line. The ratio of MIBC to CTAB bulk concentrations of the synergistic adsorption was greater than 100. However, the synergistic ratio of adsorbed concentrations, assuming no interaction between adsorbed molecules, varied from 2 to 5. The synergistic line can be explained by the existence of two molecular arrangements at the surface: one is dominated by MIBC and the other is dominated by CTAB. The dividing line is sharply distinguished for MIBC/CTAB systems due to the branched structure and relative position of hydrophobic group of MIBC. Mixtures of straight alcohol with CTAB show a smoother transition as previously reported in the literature. The synergism could be the underpinning principle for the superior performance of MIBC as a flotation frother.

dc.publisherElsevier
dc.subjectCTAB
dc.subjectSynergism
dc.subjectMIBC
dc.subjectAir/water interface
dc.titleAn unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface
dc.typeJournal Article
dcterms.source.volume39
dcterms.source.startPage255
dcterms.source.endPage261
dcterms.source.issn0892-6875
dcterms.source.titleMinerals Engineering
curtin.departmentDepartment of Chemical Engineering
curtin.accessStatusFulltext not available


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