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  

Influence of emulsifier types on the performance of dodecyl stearate phase change microcapsules

作　　者：汪海平[1] 李欣膂 刘芸[1] 鲁珍[1] 余凡[1] 胡思前[1] 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)

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,光电材料与技术学院,武汉430056

出　　处：《化工新型材料》2023年第5期185-189,共5页New Chemical Materials

基　　金：江汉大学校级科研项目(2021yb023)。

摘　　要：分别采用十二烷基苯磺酸钠/聚乙烯醇(SDBS/PVA)、吐温20和辛基苯酚聚氧乙烯醚(OP-10)3种不同的乳化剂,通过原位聚合法制备了以硬脂酸十二烷基酯(DS)相变材料为核、三聚氰胺-尿素-甲醛树脂(MUF)为壳的相变微胶囊。采用扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)、差式扫描量热仪(DSC)和热重分析仪(TG)对微胶囊的表面形貌、化学结构、相变性能和热稳定性进行了表征。结果表明,所得相变微胶囊呈圆球形,表面较为粗糙;与SDBS/PVA复配乳化剂相比,以非离子型乳化剂吐温20和OP-10制备的相变微胶囊粒径较小;当采用吐温20为乳化剂时,所得微胶囊具有良好的储热能力,熔融焓高达139.2J/g,囊芯含量为69.5%;由于DS本身的蒸发温度较高加上进一步的封装,所制备的相变微胶囊表现出良好的热稳定性,其耐热温度可达250℃。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℃.

关 键 词：硬脂酸酯 相变微胶囊 乳化剂 原位聚合 织物 

分 类 号：TB34[一般工业技术—材料科学与工程]