基于响应面优化的石蜡相变微胶囊的性能评价  

Performance Evaluation of Paraffin Phase Change Microcapsules Based on Response Surface Methodology

作　　者：张喆 方健[1] 席丽敏[1] ZHANG Zhe;FANG Jian;XI Limin(College of Materials Science and Technology,Beijing Forestry University,Beijing 100083)

机构地区：[1]北京林业大学材料科学与技术学院

出　　处：《材料导报》2019年第24期4181-4187,共7页Materials Reports

基　　金：国家重点研发计划(2016YFD06007013);北京林业大学中央高校基本科研业务费专项资金项目(2017JC12)~~

摘　　要：采用响应面设计优化石蜡相变微胶囊的制备工艺参数,建立预测模型,确定优化工艺条件。利用扫描电镜(SEM)、差示量热扫描仪(DSC)、导热系数测试仪以及热重分析仪(TG)对优化工艺条件下制备的石蜡相变微胶囊的形貌和化学结构、包覆性能、热性能及稳定性进行评价。结果表明,微胶囊呈完整的球形,表面光滑,有少量粘连情况,且包覆性能良好,芯材含量为75.77%(质量分数);相变潜热为105.93J/g、导热系数为0.1526W/(m·K);微胶囊热分解温度提高到300℃以上;将微胶囊升温至熔点以上,微胶囊体积无变化。上述研究表明微胶囊化处理可以明显增强石蜡的热稳定性和体积稳定性。Response surface methodology (RSM) was used to optimize the preparation parameters of paraffin microcapsules and the prediction model was established to determine the optimal process conditions. Scanning electron microscopy (SEM),differential calorimetry (DSC),thermal conductivity tester and thermogravimetric analyzer (TG) were used to optimize the morphology,chemical structure,coating properties,thermal properties and stability of paraffin phase change microcapsules prepared under the optimized process conditions. The results showed that the microcapsules were spherical,smooth and slightly adhered. The encapsulation performance was good and the content of core material was 75.77wt%. The latent heat of microcapsules was 105.93 J/g and the thermal conductivity was 0.152 6 W/(m·K). The thermal decomposition temperature of microcapsules was increased to over 300 ℃.The volume of microcapsules remained unchanged when the temperature of microcapsules was raised to above the melting point. It demonstrated that microencapsulation could significantly enhance thermal stability and volume stability of paraffin.

关 键 词：石蜡 相变微胶囊 性能评价 原位聚合法 响应面优化 

分 类 号：TQ323[化学工程—合成树脂塑料工业]