Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 43, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100769
Keywords
microcapsules; physical preparation; poly(ionic liquid)s; self-assembly
Categories
Funding
- National Natural Science Foundation of China [51872243]
- Science and Technology Planning Project of Shenzhen Municipality [JCYJ20190806153009355]
- Project of Graduate Innovation Fund of Northwestern Polytechnical University [CX2021114]
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A simple method for the preparation of inorganic reinforced PIL microcapsules using dispersion polymerization and cooling-assisted phase separation self-assembly is reported. The morphology of the microcapsules can be controlled by adjusting the concentration of PIL and the cooling rate. These inorganic reinforced microcapsules show enhanced suspended stability and electroresponsive characteristic when used as the dispersed phase in smart suspensions.
A simple preparation of inorganic reinforced poly(ionic liquid) (PIL) microcapsules by combining dispersion polymerization and confined cooling-assisted phase separation self-assembly is reported. Silane coupling agent-modified PIL microbeads are first prepared by dispersion polymerization. Then, the microbeads are dissolved in a theta solvent composed of good solvent and non-solvent to form hollow SiOx microcapsules at a relatively high temperature. Finally, the solution is cooled to induce the nucleation and growth of dissolved PIL chains on the inner and outer surface of hollow SiOx microcapsules to form inorganic reinforced microcapsules with asymmetric PIL/SiOx/PIL sandwich-like shell. The morphology of microcapsules can be controlled by adjusting PIL concentration and cooling rate. The inorganic reinforced microcapsules show enhanced suspended stability and electroresponsive characteristic when used as the dispersed phase of smart suspensions.
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