Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 299, Issue 10, Pages 1259-1267Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201400020
Keywords
microcapsules; oil-in-water emulsion; PMMA shell; silicone liquid core
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Microcapsules with a silicone liquid core surrounded by a polymeric shell were synthesised through the controlled phase separation. The dispersed silicone phase consisted of the shell polymer PMMA, a good solvent for the PMMA (dichloromethane, DCM) and a poor solvent (methylhydrosiloxane dimethylsiloxane) for the PMMA. The morphology of the PMMA microcapsules was investigated by ATR-FTIR and by optical microscopy. Microcapsules were prepared with different emulsifiers and different concentrations of acetone and PMMA in the oil phase. The thermal stability of the PMMA microcapsule and the content of the silicone oil core were assessed by TGA. H-1-NMR spectroscopy and an extraction method were also used to determine the content of the silicone liquid core in the microcapsules.
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