十四醇@聚苯胺微胶囊相变材料的制备及性能研究.

Microencapsulated phase change materials（MePCMs） with polyaniline（PANI） as shell material are a kind of important multifunctional MePCMs. In order to broaden the source of functionalized MePCMs with PANI shell, in this work, tetradecanol（TD） was selected as core material and a series of TD@PANI MePCMs were prepared via a simple surface polymerization of aniline in the TE/water suspension. The effects of emulsifiers and core shell mass ratio on the properties of the prepared MePCMs were investigated. The results showed that the addition of emulsifier was unfavorable to the formation of TD@PANI MePCMs. The encapsulation ratio and spherical regularity of the obtained MePCMs prepared in the reaction system without emulsifier were increased first and then decreased with the increase of the core shell mass ratio, and the best result was obtained when the core shell mass ratio was 4.8∶5.2. The onset phase change temperature of the MePCM prepared under optimal condition was 32.44 ℃ with a phase change enthalpy of 102.3 J/g and a encapsulation ratio of 46.4%. Besides, the prepared MePCM possesses good thermal stability. In addition, the chemical properties and crystal structure of the tetradecanol core material did not change after it being microencapsulated by PANI. The results of this study can build a solid foundation for the development of multifunctional MePCMs with PANI shell. [ABSTRACT FROM AUTHOR]