华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (7): 46-51.

• 化学化工 • 上一篇    下一篇

微胶囊相变材料的制备与表征

袁文辉1 刘都树1 李莉2   

  1. 1.华南理工大学 化工与能源学院,广东 广州 510640; 2 华南理工大学 环境科学与工程学院,广东 广州 510640
  • 收稿日期:2006-06-29 出版日期:2007-07-25 发布日期:2007-07-25
  • 通信作者: 袁文辉(1969-),男,副教授,主要从事纳米材料等的研究. E-mail:cewhyuan@scut. edu.cn
  • 作者简介:袁文辉(1969-),男,副教授,主要从事纳米材料等的研究.
  • 基金资助:

    教育部传热强化与节能重点实验室开放基金资助项目;广东省绿色化学品重点实验室资助项目

Preparation and Characterization of Microencapsulated Phase-Change Materials

Yuan Wen-huiLiu Du-shuLi Li2   

  1. 1. School of Chemical and Energy Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China;2. School of Environmental Science and Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-06-29 Online:2007-07-25 Published:2007-07-25
  • Contact: 袁文辉(1969-),男,副教授,主要从事纳米材料等的研究. E-mail:cewhyuan@scut. edu.cn
  • About author:袁文辉(1969-),男,副教授,主要从事纳米材料等的研究.
  • Supported by:

    教育部传热强化与节能重点实验室开放基金资助项目;广东省绿色化学品重点实验室资助项目

摘要: 以正十八烷为芯材、三聚氰胺-甲醛树脂为壁材,采用原位聚合法合成了相变储热微胶囊.利用光学显微镜、扫描电镜、差示扫描量热仪等对样品性能进行了分析和表征,并讨论了乳化剂种类和用量、助剂异氰酸酯等对微胶囊性能的影响.实验结果表明,采用阴离子与非离子混合乳化剂制备的微胶囊的各项性能均优于采用单一阴离子乳化剂所制得的微胶囊;助剂异氰酸酯的加入可大大提高微胶囊的相变潜热;所制备的相变储热微胶囊包裹完全,表面光洁,粒度均匀,平均粒径为4μm ,相变潜热达176.5 J/g.

关键词: 相变材料, 微胶囊, 三聚氰胺-甲醛树酯, 原位聚合, 制备, 表征

Abstract:

Microencapsulated phase-change materials (MPCMs) were prepared by means of in-situ polymerization , with melamine-formaldehyde as the shell and n-octadecane as the core. The properties of the products were then analyzed and characterized by using optic microscope , SEM and DSC , and the effects of the emulsifier sort , the emulsifierdosage and the isocyanate addition on the properties of the prepared microcapsules were investigated. Experimental results show that the microcapsules prepared with nonionic emulsifier and anionic emulsifier are of better performances than those prepared only with one anionic emulsifier, that the addition of isocyanate greatly improves the latent heat of. MPCMs , and that the MPCMs with an average particle size of 4. 0 μm and a latent heat up to 176. 5 J/ g are of smooth morphologies , hundred-percent wrap and homogeneous size.

Key words: phase-change material, microcapsule, melamine-formaldehyde resin, in-situ polymerization, preparation, characterization