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Pickering emulsions stabilized by hydrophilic nanoparticles: in situ surface modification by oil

Binks, Bernard P.; Yin, Dezhong

Authors

Dezhong Yin

Abstract

We propose a novel route for the stabilization of oil-in-water Pickering emulsions using inherently hydrophilic nanoparticles. In the case of dialkyl adipate oils, in situ hydrophobisation of the particles by dissolved oil molecules in the aqueous phase enables stable emulsions to be formed. Emulsion stability is enhanced upon decreasing the chain length of the oil due to its increased solubility in the precursor aqueous phase. The oil thus acts like a surfactant in this respect in which hydrogen bonds form between the carbonyl group of the ester oil and the hydroxyl group on particle surfaces. The particles chosen include both fumed and precipitated anionic silica and cationic zirconia. Complementary experiments including relevant oil–water–solid contact angles and infra-red analysis of dried particles after contact with oil support the proposed mechanism.

Journal Article Type Article
Publication Date Jan 1, 2016
Journal Soft matter
Print ISSN 1744-683X
Electronic ISSN 1744-6848
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 12
Issue 32
Pages 6858-6867
Institution Citation Binks, B. P., & Yin, D. (2016). Pickering emulsions stabilized by hydrophilic nanoparticles: in situ surface modification by oil. Soft matter, 12(32), 6858-6867. doi:10.1039/C6SM01214K
DOI https://doi.org/10.1039/C6SM01214K
Keywords Pickering emulsions; Hydrophilic nanoparticles; Stabilization
Publisher URL http://pubs.rsc.org/en/content/articlelanding/2016/sm/c6sm01214k#!divAbstract
Copyright Statement ©2017 University of Hull

Authors' accepted manuscript of article published in: Soft matter, 2016, v.12, issue 32.
Additional Information Authors' accepted manuscript of article published in: Soft matter, 2016, v.12, issue 32.

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Copyright Statement
©2017 University of Hull

Authors' accepted manuscript of article published in: Soft matter, 2016, v.12, issue 32.




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