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Microencapsulation of n‐Eicosane as Energy Storage Material

Microencapsulation of n‐Eicosane as Energy Storage Material For heat energy storage application, polyurea microcapsules containing phase change material, n‐eicosane, were synthesized by using interfacial polymerization method with toluene‐2,4‐diisocyanate (TDI) and diethylenetriamine (DETA) as monomers in an emulsion system. Poly(ethylene glycol)octyl‐phenyl ether (OP), a nonionic surfactant, was the emulsifier for the system. The experimental result indicates that TDI was reacted with DETA in a mass ratio of 3 to 1. FT‐IR spectra confirm the formation of wall material, polyurea, from the two monomers, TDI and DETA. Encapsulation efficiency of n‐eicosane is about 75%. Microcapsule of n‐eicosane melts at a temperature close to that of n‐eicosane, while its stored heat energy varies with core material n‐eicosane when wall material fixed. Thermo‐gravimetric analysis shows that core material n‐eicosane, micro‐n‐eicosane and wall material polyurea can withstand temperatures up to 130, 170 and 250 °C, respectively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

Microencapsulation of n‐Eicosane as Energy Storage Material

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References (3)

Publisher
Wiley
Copyright
Copyright © 2004 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1001-604X
eISSN
1614-7065
DOI
10.1002/cjoc.20040220502
Publisher site
See Article on Publisher Site

Abstract

For heat energy storage application, polyurea microcapsules containing phase change material, n‐eicosane, were synthesized by using interfacial polymerization method with toluene‐2,4‐diisocyanate (TDI) and diethylenetriamine (DETA) as monomers in an emulsion system. Poly(ethylene glycol)octyl‐phenyl ether (OP), a nonionic surfactant, was the emulsifier for the system. The experimental result indicates that TDI was reacted with DETA in a mass ratio of 3 to 1. FT‐IR spectra confirm the formation of wall material, polyurea, from the two monomers, TDI and DETA. Encapsulation efficiency of n‐eicosane is about 75%. Microcapsule of n‐eicosane melts at a temperature close to that of n‐eicosane, while its stored heat energy varies with core material n‐eicosane when wall material fixed. Thermo‐gravimetric analysis shows that core material n‐eicosane, micro‐n‐eicosane and wall material polyurea can withstand temperatures up to 130, 170 and 250 °C, respectively.

Journal

Chinese Journal of ChemistryWiley

Published: May 1, 2004

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