Stabilization of high internal phase Pickering emulsions with millimeter-scale droplets using silica particles

High internal phase emulsions stabilized with colloidal particles (Pickering HIPEs) have recently been studied intensively because of their great stability achieved by the irreversible adsorption of particles onto the oil-water interface and their usage as a template for synthesizing porous polymeri...

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Bibliographic Details
Published in:Soft matter 2023-05, Vol.19 (21), p.3841-3848
Main Authors: Kim, DongGwon, Lee, HaNeur, Yoon, Hojoon, Oh, DongGeun, Kim, KyuHan
Format: Article
Language:English
Subjects:
Biomedical engineering
Biomedical materials
Droplets
Emulsions
Micrometers
Pores
Porous materials
Silica
Silicon dioxide
Stabilization
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Summary:High internal phase emulsions stabilized with colloidal particles (Pickering HIPEs) have recently been studied intensively because of their great stability achieved by the irreversible adsorption of particles onto the oil-water interface and their usage as a template for synthesizing porous polymeric materials, called PolyHIPEs. In most cases, Pickering HIPEs with microscale droplets ranging from tens of micrometers to hundreds of micrometers have been successfully achieved, but the stabilization of Pickering HIPEs with millimeter-sized droplets is rarely reported. In this study, we report for the first time that, by using shape-anisotropic silica particle aggregates as a stabilizer, successful stabilization of Pickering HIPEs with millimeter-sized droplets can be achieved, and the size of droplets can be simply controlled. Additionally, we demonstrate that stable PolyHIPEs with large pores can be readily converted to PolyHIPEs with millimeter-scale pores, which have advantages in absorbent materials and biomedical engineering applications. Using shape-anisotropic silica particle aggregates as a stabilizer, Pickering HIPEs with millimeter-sized droplets have been successfully stabilized, which can be readily converted stable PolyHIPEs with large pores.
ISSN:1744-683X
1744-6848
DOI:10.1039/d3sm00237c