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Super-cooling Prevention of Microencapsulated Phase Change Material by Y.F. Fan; X.X Zhang; X.C Wang; J Li; Q.B Zhu is a Materials Science article available to read on EtoBox.

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The microcapsules comprising n-octadecane and nucleating agents encapsulated in melamine-formaldehyde resin shell with about 1 m in average diameter were prepared through in situ polymerization. The effects of nucleating agents, i.e. sodium chloride, 1-octadecnol and paraffin, on the crystallization properties, morphology and dispersibility of microcapsules were investigated using SEM, DSC and XRD. The super-cooling was prevented by adding about 6 wt.% sodium chloride to the emulsion, however, the microcapsules were worse dispersed and their surfaces were rough. Adding approximately 9 wt.% 1-octadecanol in core material was found to prevent microcapsules from super-cooling, but the microcapsules were easily conglomerated and their surfaces were extraordinarily rough. Microcapsules with approximately 20 wt.% paraffin in core material were free from super-cooling, and paraffin had no influence on the morphology and dispersibility of microcapsules.

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Author

Y.F. Fan; X.X Zhang; X.C Wang; J Li; Q.B Zhu

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0040-6031)

Published

2004

Language

EN

Field

Materials Science (Physical Sciences)