Multiple Pickering emulsions stabilized by organic pigment particles: properties and ion release

The possibility of forming water-in-oil-in-water (w/o/w) multiple emulsions stabilized solely by a mixture of organic pigment particles is demonstrated. The influence of shearing speed on both inner water drop and oil globule size is studied; both decrease with increasing shearing speed. We also inv...

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Bibliographic Details
Published inJournal of dispersion science and technology Vol. 43; no. 9; pp. 1291 - 1304
Main Authors Olusanya, Samuel O., Binks, Bernard P.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 01.07.2022
Taylor & Francis Ltd
Subjects
Drop size
Emulsions
Magnesium
magnesium ion
Multiple emulsions
pigment particles
Pigments
Shearing
shearing speed
stability
Water drops
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Summary:The possibility of forming water-in-oil-in-water (w/o/w) multiple emulsions stabilized solely by a mixture of organic pigment particles is demonstrated. The influence of shearing speed on both inner water drop and oil globule size is studied; both decrease with increasing shearing speed. We also investigate the effect of particle concentration for both pigments on the stability and drop size of w/o/w emulsions. The water drop and oil globule sizes decrease progressively once the particle concentration exceeds 0.5 wt%; this value corresponds to the minimum concentration required to form stable w/o/w emulsions. Finally, the release of magnesium ions from internal water drops to the external aqueous phase is studied. The release is very low over a period of one month.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691.2020.1851248