Issue 47, 2023

Yield stress-enabled microencapsulation of field responsive microparticle suspensions

Abstract

Try and encapsulate microparticles inside the cores of microcapsules and you will often find that particles adhere to the liquid–liquid interface in a phenomenon known as Pickering stabilization. Particles will remain irreversibly trapped and embedded within the subsequently formed microcapsule membrane. In cases where the encapsulant particles must remain suspended inside the microcapsule core to retain their desired properties or behaviours, Pickering stabilization is detrimental. Here we demonstrate a general procedure using yield stress materials as the core material, where the yield stress of the gel is strong enough to suspend particles against sedimentation, but weak enough to allow spatial manipulation of encapsulant particles using an external field. This external field imparts enough force on particles to disrupt the supporting network and allow particle mobility after encapsulation.

Graphical abstract: Yield stress-enabled microencapsulation of field responsive microparticle suspensions

Supplementary files

Article information

Article type
Paper
Submitted
16 5 2023
Accepted
10 10 2023
First published
12 10 2023
This article is Open Access
Creative Commons BY-NC license

Soft Matter, 2023,19, 9139-9145

Yield stress-enabled microencapsulation of field responsive microparticle suspensions

S. R. Wilson-Whitford, M. C. Roffin, J. Gao, T. Kaewpetch and J. F. Gilchrist, Soft Matter, 2023, 19, 9139 DOI: 10.1039/D3SM00642E

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