摘要
采用原位聚合法制备了以石蜡为芯材、三聚氰胺-甲醛-尿素树脂为壁材、复合纳米铝(Al)及羧基化碳纳米管(C-CNT)的相变微胶囊(MPCM)。测试分析了无添加剂、只复合单一物质以及同时复合Al和C-CNT的MPCM的外观、粒径、导热系数、过冷度以及悬浮液物理稳定性。结果表明:制备的MPCM成型良好;添加剂提高了微胶囊的导热系数,降低了过冷度,与Al相比,C-CNT的改善效果较为明显;添加质量分数为2%CCNT和4.5%Al调节微胶囊密度接近基液密度,实现了悬浮液48 h不分层。
The microencapsulated phase change materials（MPCM） are synthesized by polymerization using paraffin as core and urea-melamine-formaldehyde polymer as shell and composite nano aluminum（Al） and carboxylic carbon nano tube（C-CNT）. The morphology,diameter distributions,thermal conductivities,degrees of supercooling and stability of the MPCMs（without additives,with nano aluminum,with nano aluminum and C-CNT） are measured. The modified MPCMs all showspherical shape,and the additives improve the thermal conductivity of microcapsules and reduce the supercooling degree. Adding 2% C-CNT and 4.5% Al to adjust the density of microcapsules is close to the base liquid density,and the suspension remains stable for 48 h.
作者
王志楚
周宇飞
乐平
姜未汀
姚远
张涛
仇中柱
WANG Zhichu;ZHOU Yufei;LEPing;JIANG Weiting;YAO Yuan;ZHANG Tao;QIU Zhongzhu(Southeast University,Nanjing 210096,China;Shanghai University o f Electric Power,Shanghai 200090,China;Shanghai Hongqiao Business District Energy Service Co.,Lt）,Shanghai 201107,China)
出处
《上海电力学院学报》
CAS
2018年第4期333-338,共6页
Journal of Shanghai University of Electric Power
基金
欧盟委员会第七框架协议玛丽居里国际人才引进项目(FP7-PEOPLE-2011-IIF-298093)
上海市自然科学基金(17ZR1411300)
上海市科学委员会重点科技攻关项目(17DZ1201500)
关键词
相变微胶囊
过冷
导热系数
物理稳定性
microencapsulated phase change
supercooling
thermal conductivity coefficient
physicalstability
