Encapsulation of ionic liquid BMIm[PF6] within polyurea microspheres |
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| Affiliation: | 1. Department of Chemistry, Beijing Technology and Business University, Beijing 100048, China;2. School of Artificial Intelligence, Beijing Technology and Business University, Beijing 100048, China;3. School of Food and Health, Beijing Technology and Business University, Beijing 100048, China;4. Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China |
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| Abstract: | The encapsulation of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIm[PF6]) in polyurea microspheres is demonstrated. This method is based on the encapsulation of ionic liquid within a polyurea shell by emulsification and interfacial polymerization of amine and isocyanate monomers. Emulsification of BMIm[PF6] was performed in water or oil, enabling formation of two different BMIm[PF6] polyurea microcapsules with different chemical features. While the BMIm[PF6]-in-water emulsion enables the formation of BMIm[PF6] polyurea microcapsules with regular aliphatic diamines, the BMIm[PF6]-in-oil emulsion requires the utilization of a specific diamine functionalized with ionic liquid groups. The microcapsules were characterized by scanning electron microscopy, thermal gravimetric analysis, infrared and solid NMR. |
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