Preparation and Characterization of Urea-Formaldehyde Microcapsule Containing Fragrant Oil

향 오일을 함유한 우레아-포름알데히드 마이크로캡슐의 제조 및 특성

  • 박수진 (한국화학연구소 화학소재연구부) ;
  • 신유식 (한국화학연구소 화학소재연구부) ;
  • 홍영택 (한국화학연구소 화학소재연구부) ;
  • 이재락 (한국화학연구소 화학소재연구부) ;
  • 박병기 (전북대학교 섬유공학과)
  • Published : 2000.12.01

Abstract

A natural functional compound, i.e., fragrant oil, has been studied in the microencapsulation field. Urea-formaldehyde ws used as the prepolymer for the skin layer in microencapsulation. The microcapsules containing the natural functional compound were produced by in situ polymerization with the prepolymer. Analysis of the shape and particle distribution of microcapsules were carried out using and image analyzer. The diameters and distribution ranges of the microcapsules were controlled by different factors, such as, stirring time, emulsifier, and viscosity. The average diameter of microcapsules decreased with increase in both the stirring rate and stirring time. In the presence of the emulsifier, the average diameter decreased up to 5g emulsifier in 100$m\ell$ deionized water, and then increased as the emulsifier concentration increased, resulting from the variance of viscosity. The dependence of average size on viscosity was discussed in the reunification of natural functional compound in a core system.

Keywords

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