An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface
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. T...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/43706 |
| _version_ | 1848756781145128960 |
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| author | Le, Ngoc Thu Phan, Chi Nguyen, A. Ang, Ming |
| author_facet | Le, Ngoc Thu Phan, Chi Nguyen, A. Ang, Ming |
| author_sort | Le, Ngoc Thu |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T09:17:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-43706 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:17:39Z |
| publishDate | 2012 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-437062017-09-13T13:37:33Z An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface Le, Ngoc Thu Phan, Chi Nguyen, A. Ang, Ming CTAB Synergism MIBC Air/water interface 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. 2012 Journal Article http://hdl.handle.net/20.500.11937/43706 10.1016/j.mineng.2012.06.003 Elsevier restricted |
| spellingShingle | CTAB Synergism MIBC Air/water interface Le, Ngoc Thu Phan, Chi Nguyen, A. Ang, Ming An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface |
| title | An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface |
| title_full | An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface |
| title_fullStr | An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface |
| title_full_unstemmed | An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface |
| title_short | An unusual synergistic adsorption of MIBC and CTAB mixtures at the air–water interface |
| title_sort | unusual synergistic adsorption of mibc and ctab mixtures at the air–water interface |
| topic | CTAB Synergism MIBC Air/water interface |
| url | http://hdl.handle.net/20.500.11937/43706 |