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| Preparation and Characterization of High Stability Polyurea MicroPCMs Using a Two-step Method of Adding DETA by Interfacial Polymerization |
| Shaofeng Lu, Jianwei Xing, Qin Wu |
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Abstract Butyl stearate and polyurea resin polymerized via toluene-2, 4-diisocyanate (TDI) and diethylene
triamine (DETA) were respectively used as the core material and the shell material in preparing
MicroPCMs. The phase change properties, chemical structure, surface morphology and particle size
and size distribution of microcapsules were investigated by using DSC, FTIR, SEM and Malvern laser
particle size analyzer. The results show that the prepared MicroPCMs were smooth and compact. Their
melting temperature and enthalpies were 23.3 degrees centigrade and 79.7 J per g respectively. The average diameter
of microencapsulated PCM (MicroPCMs) is in the range of 4.5?10.2 1m under the stirring speed of
3000?6000 rpm. Furthermore, a two-step method of adding DETA was ˉrstly presented, through this
method, the heat stability and ethanol wash stability of the MicroPCMs has been greatly improved, and
the shell of MicroPCMs prepared by the two-step method has better stability and compactness than
one-step method.
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| Cite this article: |
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Shaofeng Lu,Jianwei Xing,Qin Wu. Preparation and Characterization of High Stability Polyurea MicroPCMs Using a Two-step Method of Adding DETA by Interfacial Polymerization[J]. Journal of Fiber Bioengineering and Informatics, 2013, 6(2): 185-194.
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2013, Vol. 6 
