Inorganic/organic hybrid microcapsules: melamine formaldehyde-coated Laponite-based Pickering emulsions

Journal of Colloid and Interface Science
Mark WilliamsJohan Smets

Abstract

A facile synthesis route to novel inorganic/organic hybrid microcapsules is reported. Laponite nanoparticles are surface-modified via electrostatic adsorption of Magnafloc, an amine-based polyelectrolyte allowing the formation of stable oil-in-water Pickering emulsions. Hybrid microcapsules can be subsequently prepared by coating these Pickering emulsion precursors with dense melamine formaldehyde (MF) shells. Employing a water-soluble polymeric stabiliser, poly(acrylamide-co-sodium acrylate) leads to stable hybrid microcapsules that survive an alcohol challenge and the ultrahigh vacuum conditions required for SEM studies. Unfortunately, the presence of this copolymer also leads to secondary nucleation of excess MF latex particles in the aqueous continuous phase. However, since the Magnafloc is utilised at submonolayer coverage when coating the Laponite particles, the nascent cationic MF nanoparticles can deposit onto anionic surface sites on the Laponite, which removes the requirement for the poly(acrylamide-co-sodium acrylate) component. Following this electrostatic adsorption, the secondary amine groups on the Magnafloc chains can react with the MF, leading to highly robust cross-linked MF shells. The absence of the copolyme...Continue Reading

References

Aug 18, 2001·Journal of Microencapsulation·G Sun, Z Zhang
Mar 15, 2003·Science·A R BauschD A Weitz
Oct 16, 2007·Journal of Colloid and Interface Science·Samia Laïb, Alexander F Routh
Dec 10, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Huai Nyin Yow, Alexander F Routh
Feb 24, 2010·Chemical Communications : Chem Comm·Yue LongJon A Preece
Sep 4, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Jian Li, Harald D H Stöver
Oct 30, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Jian LiHarald D H Stöver
Oct 30, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Qingchun YuanSimon Biggs
Nov 11, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·A WalshD W York
Dec 8, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Mark WilliamsDavid W York
Feb 10, 2012·Journal of Colloid and Interface Science·Xiaoli WangShiping Zhu

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Citations

Oct 28, 2016·European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences·Tao YiJifen Zhang
Nov 9, 2020·Advances in Colloid and Interface Science·V Chandran SujaG G Fuller
Mar 21, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Syuuhei KomatsuAkihiko Kikuchi

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