- 目录
- 保温材料与建筑节能
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纳米Al2O3改性三聚氰胺-尿素-甲醛树脂微胶囊相变材料的制备
作者：张裕昌，桂鹏策，余婷，陶娜，汪海平
（江汉大学 光电化学材料与器件教育部重点实验室，化学与环境工程学院，湖北 武汉 430056）
摘要：将纳米Al2O3加入以正十四醇为囊芯、三聚氰胺-尿素-甲醛树脂为囊壁材料的原位聚合微胶囊体系，合成了具有储热性能的纳米Al2O3改性相变微胶囊。采用扫描电子显微镜、傅立叶变换红外光谱仪、X射线荧光光谱仪、差示扫描量热仪和热重分析仪等对微胶囊的表面形貌、化学组成及热性能进行了表征。结果表明，加入芯材质量5%的纳米A12O3时，制备的微胶囊呈球形，其表面粗糙度和热稳定性均增加，微胶囊的包裹率略有降低，从54.6%降至46.7%。同时，相变微胶囊的过冷度从7.47 ℃降至6.25 ℃。
关键词：相变材料；微胶囊；正十四醇；三聚氰胺-尿素-甲醛树脂；纳米Al2O3
中图分类号：TU55+1 文献标识码：A 文章编号：1001-702X（2019）11-0094-05
Preparation of melamine-urea-formaldehyde resin microencapsulated phase-change materials modified by nano-A12O3
ZHANG Yuchang，GUI Pengce，YU Ting，TAO Na，WANG Haiping
（Key Laboratory of Optoelectronic Chemical Materials and Devices，Ministry of Education，
School of Chemical and Environmental Engineering，Jianghan University，Wuhan 430056，China）
Abstract：The nano-A12O3 composite phase change microcapsules with thermal storage function was prepared by using n-tetradecanol as core and melamine-urea-formaldehyde resin as shell by in-situ polymerization. The surface morphology，chemical composition and thermal properties of the microcapsules were characterized and analyzed by using scanning electron microscopy，Fourier transform infrared spectroscopy，X-ray fluorescence，differential scanning calorimetry and thermogravimetry，respectively. The results show that when the mass ratio of nano-A12O3 to n-tetradecanol is 5%，the modified microencapsulated phase-change material are spherical，and the surface roughness and the thermal stability of microcapsules can be enhanced compared with the pure microcapsules. After adding nano-A12O3，the package rate of microcapsule is slightly lower from 54.6% to 46.7%，and the super-cooling is reduced from 7.47 ℃ to 6.25 ℃.
Key words：phase change materials，microcapsule，n-tetradecanol，melamine-urea-formaldehyde resin，nano-A12O3