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研究微胶囊相变材料包封率的影响因素,为微胶囊相变材料的研发及生产加工提供参考。以三聚氰胺-甲醛树脂为壁材,正十二醇为芯材,通过原位聚合法制备微胶囊相变材料。采用响应面分析(RSM)实验设计和多元二次回归方法作为函数估计的工具,研究微胶囊制备体系中物料配比函数与微胶囊包封率之间的关系,建立了二次多元回归模型。得出物料配比的较佳组合为:分散剂苯乙烯马来酸酐共聚物(SMA)质量分数为4.84%,乳化剂壬基酚聚氧乙烯醚(OP-10)质量分数为6.01%,芯材投料质量分数为64.83%。实验结果表明,微胶囊相变材料包封率为59.53%,与预测值58.79%接近。扫描电子显微镜(SEM)照片显示微胶囊表面光滑致密,傅里叶红外(FTIR)分析显示芯材十二醇被三聚氰胺-甲醛树脂包覆。
The factors affecting the entrapment efficiency of microcapsule phase-change materials were studied to provide reference for the development, production and processing of microcapsule phase-change materials. Using melamine - formaldehyde resin as wall material and n - dodecyl alcohol as core material, microcapsule phase change material was prepared by in - situ polymerization. Response surface analysis (RSM) experimental design and multivariate quadratic regression method were used as the function estimation tools to study the relationship between material ratio function and encapsulation efficiency in microcapsule preparation system, and established the second multiple regression model. The best combination of the materials is as follows: the mass fraction of dispersant styrene maleic anhydride copolymer (SMA) is 4.84%, the mass fraction of emulsifier nonylphenol polyoxyethylene ether (OP-10) is 6.01%, the core Material feeding mass fraction of 64.83%. The experimental results show that the entrapment efficiency of the microcapsule phase change material is 59.53%, which is close to the predicted value of 58.79%. Scanning electron microscopy (SEM) photographs showed that the microcapsule surface was smooth and compact. The FTIR analysis showed that the core dodecanol was coated with melamine-formaldehyde resin.