文化大學機構典藏 CCUR:Item 987654321/2765
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/2765


    题名: Release properties on gelatin-gum arabic microcapsules containing camphor oil with added polystyrene
    作者: Chang, Chih-Pong
    Leung, Ting-Kai
    Lin, Shang-Ming
    Hsu, Che-Chang
    贡献者: 紡工系
    关键词: complex coacervation method
    camphor oil
    polystyrene
    日期: 2006
    上传时间: 2009-11-20 13:18:45 (UTC+8)
    摘要: In this study, gelatin blended with arabic gum microcapsules containing camphor oil with added polystyrene were fabricated by a compound coacervation method. The parameters of oil/wall volume ratio, emulsification stirring speed, concentration of cross-linking agent, treated time and oil release properties were investigated. In order to improve the constant release effect of camphor oil, oil-soluble polystyrene (PS) was used as a sustained release agent. The camphor oil release curves were expressed by the exponential equation: psi(t) = C-eq(1-e(-t/tau)), where psi(t) represent the variant of camphor oil concentration in the operation environment, C-eq as the equilibrium state, t as the release time and tau as time constant. C-eq and tau are significant factors pertaining to the camphor oil release properties. The results indicated that, for the microcapsules, the optimal oil/wall volume ratio was 0.75 to achieve the encapsulation efficiency of 99.6 wt.%. The average particle size were 294.7 +/- 14.2 mu m, 167.2 +/- 11.2 mu m, 85.7 +/- 8.7 mu m at the homogenization stirring speed of 500, 1000, and 2000 rpm, respectively. The effect of sustained oil release will increase whereas the stirring speed decreases and the concentration of glutaraldehyde (GA) and treated time increases. Along with the increasing of quantity of polystyrene added, C-eq decreased and tau increased, indicating that the sustained oil release amount and the release rate depend on the quantity of PS considerably. (C) 2006 Elsevier B.V. All rights reserved.
    關聯: COLLOIDS AND SURFACES B-BIOINTERFACES Volume: 50 Issue: 2 Pages: 136-140
    显示于类别:[紡織工程學系] 期刊論文

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