Influence of emulsifier types on the performance of dodecyl stearate phase change microcapsules
Wang Haiping, Li Xinlv, Liu Yun, Lu Zhen, Yu Fan, Hu Siqian
Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056
Abstract: Phase change microcapsules with dodecyl stearate (DS) as the core and melamine-urea-formaldehyde resin (MUF) as the shell were successfully prepared by in situ polymerization respectively in the aqueous solutions of sodium dodecylbenzene sulfonate polyvinyl alcohol ((SDBS/PVA),Tween 20 and octylphenolpolyoxyethyleneether (OP-10).The surface morphology,chemical structure,phase change properties and thermal stability of the microcapsules were characterized by scanning electron microscopy (SEM),Fourier infrared spectroscopy (FT-IR),differential scanning calorimetry (DSC) and thermogravimetric analysis (TG).The results showed that the obtained phase change microcapsules were spherical with a rough surface.Compared with the SDBS/PVA compound emulsifier,the microcapsules fabricated with non-ionic emulsifiers Tween 20 or OP-10 had smaller particle sizes.When Tween 20 was used as the emulsifier,the resulting microcapsules had good heat storage capacity with a high melting enthalpy of 139.2J/g and a core content of 69.5%.Owing to the high evaporation temperature of DS itself and further encapsulation,the prepared phase change microcapsules showed higher thermal stability with a heat resistance temperature of up to 250℃.
汪海平, 李欣膂, 刘芸, 鲁珍, 余凡, 胡思前. 不同乳化剂种类对硬脂酸十二烷基酯相变微胶囊的性能影响[J]. 化工新型材料, 2023, 51(5): 185-189.
Wang Haiping, Li Xinlv, Liu Yun, Lu Zhen, Yu Fan, Hu Siqian. Influence of emulsifier types on the performance of dodecyl stearate phase change microcapsules. New Chemical Materials, 2023, 51(5): 185-189.
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