Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Haidian District, Beijing 100084, China.
Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
J Colloid Interface Sci. 2013 Feb 15;392:407-414. doi: 10.1016/j.jcis.2012.10.052. Epub 2012 Nov 8.
A series of polyurea/polyurethane microcapsules with butyl stearate and paraffin as binary core materials are successfully synthesized via interfacial polymerization method. The phase change temperature of these microencapsulated phase change materials (micro-PCMs) can be adjusted by regulating the composition of the binary core. SEM photographs show that these micro-PCMs have relatively spherical profiles and compact surfaces with diameter ranging from 5 to 15 μm. DSC results indicate that the binary core content in micro-PCMs is in a range of 45-60 wt%. Moreover, after being treated under 50°C for 7 days or subjected to thermal-cycling test for 500 times, the micro-PCMs keep good thermal performances and stabilities. Besides, these micro-PCMs show good thermal stability, and the degradation temperature differs from the different compositions of the binary core and molecular weight of the water-soluble monomers.
通过界面聚合法成功合成了一系列以硬脂酸丁酯和石蜡为二元芯材的聚脲/聚氨酯微胶囊。这些微胶囊相变材料（micro-PCMs）的相变温度可以通过调节二元芯材的组成来调节。SEM 照片显示，这些微 PCMs 具有相对球形的轮廓和紧凑的表面，直径在 5 至 15μm 之间。DSC 结果表明，微 PCMs 中的二元芯含量在 45-60wt%范围内。此外，在 50°C 下处理 7 天或进行 500 次热循环测试后，微 PCMs 仍保持良好的热性能和稳定性。此外，这些微 PCMs 具有良好的热稳定性，其降解温度因二元核的不同组成和水溶性单体的分子量而异。
