Fabrication and properties of microcapsules and nanocapsules containing n-octadecane

X. X. Zhang, Y. F. Fan, Xiaoming Tao, Kit Lun Yick

Research output: Journal article publicationJournal articleAcademic researchpeer-review

271 Citations (Scopus)

Abstract

Microcapsules and nanocapsules containing n-octadecane with melamine-formaldehyde shell were fabricated by in situ polymerization. The effects of stirring rate, contents of emulsifier and contents of cyclohexane on diameters, morphology, phase change properties and thermal stabilities of the capsules were studied by using FT-IR, SEM, DSC and TG. The diameters of the microcapsules decreased with the increase of stirring rate, emulsifier content and cyclohexane content. The relationship between stirring rate and number-average diameters or weight-average diameters of the microcapsules is an exponent. The relationship between emulsifier content and number-average diameters or weight-average diameters of the microcapsules is an exponent, too. The diameters had less effects on the melting behaviour of microcapsules, however, they had significant effects on the crystallization behaviour. As the diameters of the microcapsules decreased, two crystallization peaks were observed from the DSC cooling curves. The ratio of the integrated area of the peak in the lower temperature increased with the decrease in diameters of microcapsules. The thermal stability of micro/nanocapsule rises with the increase of stirring rates and TA content. The cyclohexane content has no significantly effect on thermal stability of the nanocapsule.
Original languageEnglish
Pages (from-to)300-307
Number of pages8
JournalMaterials Chemistry and Physics
Volume88
Issue number2-3
DOIs
Publication statusPublished - 15 Dec 2004

Keywords

  • Chemical synthesis
  • Crystallization
  • Differential scanning calorimetry
  • Electron microscopy
  • Polymers

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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