碳纳米管复合相变微胶囊的过冷性  

Super-cooling of phase change microcapsules incorporated with carbon nano tube

作　　者：徐德彬[1] 宋庆文[1] 王进美[1] 

机构地区：[1]西安工程大学纺织与材料学院,西安710048

出　　处：《天津工业大学学报》2011年第4期15-18,共4页Journal of Tiangong University

基　　金：陕西省工业攻关计划项目(2010K10-09);陕西省教育厅重点实验室项目(2010JS006)

摘　　要：采用原位聚合法合成了以溴代十六烷为囊芯、三聚氰胺一甲醛树脂为囊壁、掺杂多壁碳纳米管（CNT）的复合相变微胶囊；采用扫描电镜表征微胶囊的形貌，用差示扫描量热法（Dsc）分析微胶囊的热性能，并对不同CNT的用量、不同甲醛／三聚氰胺摩尔比对包裹率、过冷度的影响进行了研究．结果表明：碳纳米管复合相变微胶囊的外观呈圆球形，其平均粒径为2．47～5．44μm；加入CNT后，微胶囊的包裹率略有降低，从75％降低到62％，但随着CNT用量的提高可显著调节微胶囊的结晶温度，并使过冷度从9．77℃降低到6．84℃．The carbon nano tube composite phase change microcapsules（MicroPCMs）with hexadecane bromide as core and melamine-formaldehyde as shell are prepared by in situ polymerization. The morphology of microcapsules is characterized by using scanning electron microscopy （SEM）, and thermal properties are analyzed by DSC. The influences of amount of CNT, molar ratio of melamine and formaldehyde on the super-cooling and package rate of microcapsules are investigated. The results show that the carbon nano tube composite phase change microcapsules are spherical, the average particle size is 2.47-5.44 μm; after joining CNT, the package rate of micro-capsule is slightly lower from 75% to 62%, but increasing the amount of CNT can significantly adjust the phase transition temperature of microcapsules, and the super-cooling is reduced from 9.77℃ to 6.84 ℃.

关 键 词：碳纳米管 相变微胶囊 过冷度 

分 类 号：TS195.2[轻工技术与工程—纺织化学与染整工程] TB34[轻工技术与工程—纺织科学与工程]