文献类型：期刊文章

作　　者：郑立辉[1] 方美华[1] 程四清[1] 宋光森[1]

机构地区：[1]武汉工业学院生物与化学工程系,武汉430023

出　　处：《应用化学》

基　　金：湖北省自然科学基金资助项目 ( 2 0 0 2AB0 63 )

年　　份：2004

卷　　号：21

期　　号：2

起止页码：200-202

语　　种：中文

收录情况：AJ、BDHX、BDHX2000、CAS、CSCD、CSCD2011_2012、JST、RSC、ZGKJHX、核心刊

摘　　要：Paraffin microcapsules with urea-formaldehyde polymer skin are prepared by in-situ polymerization of urea-formaldehyde prepolymer. It is found that the pH value of the aqueous solution, addition of NaCl and temperature affect the developing rate of microcapsules, and the most important appears pH value. The thermal properties of the microcapsules are explored by differential scanning calorimetry. The optimum conditions are:pH value 1.5, temperature 333.15～363.15 K, mass fraction of NaCl about 10%. The thermal analysis results show that the endothermic ability between 296.26 K and 308.15 K amounts to 9.11 J/g when the microcapsules undergo solid-liquid phase change at 300.53 K, the mean fusion heat of the microcapsule is 1.20 J/(g·K).

关 键 词：石蜡 微胶囊 原位聚合法 相变材料 差示扫描量热法 热性能

分 类 号：O623.11]