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采用乳液界面水解缩聚法,制备了以SiO_2为壁材、固体石蜡为芯材的相变储能微胶囊,并使用DSC(差示扫描量热仪)、TGA(热重分析仪)、SEM(扫描电子显微镜)、OM(光学显微镜)和FT-IR(傅里叶红外光谱仪)对微胶囊的热性能、形貌、化学组成、渗漏性能等进行了研究。结果表明:相同条件下,使用吐温80(Tween-80)和十二烷基苯磺酸钠(SDBS)作乳化剂,溶剂无水乙醇和纯净水的比例为1∶4,在碱催化条件下制备的微胶囊,粒径分布较窄,球形规则,平均粒径在100μm,相变潜热为75J/g,微胶囊的封装牢固性较好,渗漏率低于1.0%。
The phase change energy storage microcapsules with SiO_2 as the wall material and the solid paraffin as the core material were prepared by emulsion interfacial hydrolysis and polycondensation method. DSC (differential scanning calorimeter), TGA (thermal gravimetric analyzer), SEM Scanning electron microscopy (OMEM), OM (optical microscope) and FT-IR (Fourier transform infrared spectroscopy) were used to investigate the thermal properties, morphology, chemical composition and leakage of microcapsules. The results showed that under the same conditions, Tween-80 and SDBS were used as emulsifiers. The ratio of absolute ethanol to pure water was 1: 4. Under the conditions of base catalysis The prepared microcapsules have narrow particle size distribution, regular spherical shape, average particle diameter of 100 μm, and latent heat of transformation of 75 J / g. The encapsulation of the microcapsules is good and the leakage rate is less than 1.0%.