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Pickering emulsions responsive to CO₂/N₂ and light dual stimuli at ambient temperature

Jiang, Jianzhong; Ma, Yuxuan; Cui, Zhenggang; Binks, Bernard P.

Authors

Jianzhong Jiang

Yuxuan Ma

Zhenggang Cui

Abstract

A dual stimulus-responsive n-octane-in-water Pickering emulsion with CO₂/N₂ and light triggers is prepared using negatively charged silica nanoparticles in combination with a trace amount of dual switchable surfactant, 4-butyl-4-(4-N,N-dimethylbutoxyamine) azobenzene bicarbonate (AZO-B₄) as stabilizers. On one hand, the emulsion can be transformed between stable and unstable at ambient temperature rapidly via the N₂/CO₂ trigger, and on the other hand a change in droplet size of the emulsion can occur upon light irradiation/re-homogenization cycles without changing the particle/surfactant concentration. The dual responsiveness thus allows for a precise control of emulsion properties. Compared with emulsions stabilised by specially synthesized stimuli-responsive particles or by stimuli-responsive surfactants, the method reported here is much easier and requires relatively low concentration of surfactant (≈1/10 cmc), which is important for potential applications.

Journal Article Type Article
Publication Date Aug 30, 2016
Journal Langmuir
Print ISSN 0743-7463
Electronic ISSN 1520-5827
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 32
Issue 34
Pages 8668-8675
Institution Citation Jiang, J., Ma, Y., Cui, Z., & Binks, B. P. (2016). Pickering emulsions responsive to CO₂/N₂ and light dual stimuli at ambient temperature. Langmuir : the ACS journal of surfaces and colloids, 32(34), 8668-8675. https://doi.org/10.1021/acs.langmuir.6b01475
DOI https://doi.org/10.1021/acs.langmuir.6b01475
Keywords Colloid, Switchable emulsion, Dual stimuli responsive, CO₂/N₂ trigger
Publisher URL http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.6b01475
Copyright Statement ©2017 The University of Hull. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.langmuir.6b01475
Additional Information This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.langmuir.6b01475

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Copyright Statement
©2017 The University of Hull. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.langmuir.6b01475


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Copyright Statement
©2017 The University of Hull. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.langmuir.6b01475



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