Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes.
This paper demonstrates the use of polyelectrolytes to modify and manipulate the adsorption of ionic surfactants onto the hydrophilic surface of silica. We have demonstrated that the cationic polyelectrolyte poly(dimethyl diallylammonium chloride), poly-dmdaac, modifies the adsorption of cationic an...
| Autori principali: | , , , |
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| Natura: | Journal article |
| Lingua: | English |
| Pubblicazione: |
2004
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| _version_ | 1826301047829692416 |
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| author | Penfold, J Tucker, I Staples, E Thomas, R |
| author_facet | Penfold, J Tucker, I Staples, E Thomas, R |
| author_sort | Penfold, J |
| collection | OXFORD |
| description | This paper demonstrates the use of polyelectrolytes to modify and manipulate the adsorption of ionic surfactants onto the hydrophilic surface of silica. We have demonstrated that the cationic polyelectrolyte poly(dimethyl diallylammonium chloride), poly-dmdaac, modifies the adsorption of cationic and anionic surfactants to the hydrophilic surface of silica. A thin robust polymer layer is adsorbed from a dilute polymer/surfactant solution. The resulting surface layer is cationic and changes the relative affinity of the cationic surfactant hexadecyl trimethylammonium bromide, C16TAB, and the anionic surfactant sodium dodecyl sulfate, SDS, to adsorb. The adsorption of C16TAB is dramatically reduced. In contrast, strong adsorption of SDS was observed, in situations where SDS would normally have a low affinity for the surface of silica. We have further shown that subsequent adsorption of the anionic polyelectrolyte sodium poly(styrene sulfonate), Na-PSS, onto the poly-dmdaac coated surface results in a change back to an anionic surface and a further change in the relative affinities of the cationic and anionic surfactants for the surface. The relative amounts of C16TAB and SDS adsorption depend on the coverage of the polyelectrolyte, and these preliminary measurements show that this can be manipulated. |
| first_indexed | 2024-03-07T05:26:27Z |
| format | Journal article |
| id | oxford-uuid:e0baa3d1-fd6c-4515-af72-2491dfd1f9ff |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:26:27Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:e0baa3d1-fd6c-4515-af72-2491dfd1f9ff2022-03-27T09:49:22ZManipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e0baa3d1-fd6c-4515-af72-2491dfd1f9ffEnglishSymplectic Elements at Oxford2004Penfold, JTucker, IStaples, EThomas, RThis paper demonstrates the use of polyelectrolytes to modify and manipulate the adsorption of ionic surfactants onto the hydrophilic surface of silica. We have demonstrated that the cationic polyelectrolyte poly(dimethyl diallylammonium chloride), poly-dmdaac, modifies the adsorption of cationic and anionic surfactants to the hydrophilic surface of silica. A thin robust polymer layer is adsorbed from a dilute polymer/surfactant solution. The resulting surface layer is cationic and changes the relative affinity of the cationic surfactant hexadecyl trimethylammonium bromide, C16TAB, and the anionic surfactant sodium dodecyl sulfate, SDS, to adsorb. The adsorption of C16TAB is dramatically reduced. In contrast, strong adsorption of SDS was observed, in situations where SDS would normally have a low affinity for the surface of silica. We have further shown that subsequent adsorption of the anionic polyelectrolyte sodium poly(styrene sulfonate), Na-PSS, onto the poly-dmdaac coated surface results in a change back to an anionic surface and a further change in the relative affinities of the cationic and anionic surfactants for the surface. The relative amounts of C16TAB and SDS adsorption depend on the coverage of the polyelectrolyte, and these preliminary measurements show that this can be manipulated. |
| spellingShingle | Penfold, J Tucker, I Staples, E Thomas, R Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes. |
| title | Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes. |
| title_full | Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes. |
| title_fullStr | Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes. |
| title_full_unstemmed | Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes. |
| title_short | Manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes. |
| title_sort | manipulation of the adsorption of ionic surfactants onto hydrophilic silica using polyelectrolytes |
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