有机硅包覆硬脂酸十二烷基酯相变微胶囊的制备与性能  

Preparation and properties of organosilicon-coated dodecyl stearate phase change microcapsule

作　　者：汪海平[1] 曾怡芸 陈吕鑫 刘芸[1] 张玉敏[1] Wang Haiping;Zeng Yiyun;Chen Lvxin;Liu Yun;Zhang Yumin(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》2025年第3期126-131,共6页New Chemical Materials

基　　金：江汉大学校级科研项目(2021yb023)。

摘　　要：以正硅酸四乙酯(TEOS)、3-(异丁烯酰氧)丙基三甲氧基硅烷(MPS)和甲基三乙氧基硅烷(MTES)为有机硅烷前驱体,通过溶胶-凝胶法制备了一系列有机硅包覆硬脂酸十二烷基酯(DS)相变微胶囊,考查了有机硅烷前驱体的组成、芯/壁投料质量比对微胶囊性能的影响,通过扫描电镜(SEM)、红外光谱(FT-IR)、X射线衍射(XRD)、差式扫描量热仪(DSC)和热重分析仪(TG)等对微胶囊性能进行了表征。结果表明,所制备的微胶囊由DS和有机硅壁材组成,粒径大小介于50~100nm;当TEOS/MTES质量比为95∶5、芯/壁投料比为1∶1时,微胶囊的包封效率最高可达35.45%;有机硅壁材能够有效阻止芯材融化后的泄露,同时提升相变微胶囊的热稳定性能;经过100次热循环后,相变微胶囊的熔融焓保持在94%以上,显示出良好的相变稳定性和可重复性。A series of organosilicon-coated dodecyl stearate(DS) phase change microcapsules were prepared through the sol-gel method using tetraethyl orthosilicate(TEOS),3-methacryloxypropyltrimethoxysilane(MPS),and methyltriethoxysilane(MTES) as the organic silane precursors.The influence of the composition of the organic silane precursors and core/shell mass ratio on the microcapsule properties was investigated.The properties of the microcapsules were characterized by scanning electron microscopy(SEM),Fourier-transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),differential scanning calorimetry(DSC),and thermogravimetric analysis(TGA).The results showed that the prepared microcapsules were composed of DS and organosilicon shell,with particle sizes ranging from 50 to 100nm.When the TEOS/MTES mass ratio was 95∶5 and the core/shell ratio was 1∶1,the highest encapsulation efficiency of the microcapsules could reach a maximum of 35.45%.The organosilicon shell effectively prevented the leakage of the core material after melting,while enhancing the thermal stability of the phase change microcapsules.After 100 thermal cycles,the melting enthalpy of the microcapsules remained above 94%,demonstrating good phase change stability and repeatability.

关 键 词：相变微胶囊 硬脂酸十二烷基酯 有机硅烷 相变材料 

分 类 号：TB34[一般工业技术—材料科学与工程]