摘要
为制备适用于建筑工程中具有调温作用的相变微胶囊材料,本文制备了以石蜡为芯材,以甲苯二异氰酸酯(TDI)和二乙烯三胺(DETA)合成聚脲为壁材的相变微胶囊材料,探究乳化剂OP-10和十二烷基苯磺酸钠(SDBS)在不同条件下制备相变微胶囊的收率、热性能、表面形貌、粒径。OP-10作乳化剂时,当乳化剂占比油相3%,乳化转速为800 rpm,芯壁比为2∶1时获得的微胶囊性能更优,热焓值为115.3 J·g^(-1),包覆率为79.77%,平均粒径为22.31μm;SDBS作乳化剂时,当乳化剂占比油相3%,乳化转速为2000 rpm,芯壁比为1∶1.5时取得的微胶囊,热焓值为77.35 J·g^(-1),包覆率为53.11%,平均粒径为18.67μm。以OP-10为乳化剂得到的微胶囊热焓值较高,受制备条件影响较小,热学性能较稳定;以SDBS为乳化剂得到的微胶囊表面形貌较规整,收率较高。
In order to prepare phase change microcapsule materials suitable for temperature regulation in construction projects,paraffin wax was as the core material,toluene diisocyanate(TDI)and diethylenetriamine(DETA)synthesized polyurea as the wall material to explore the yield,thermal performance,surface morphology and particle size of the emulsifier OP-10 and sodium dodecylbenzene sulfonate(SDBS)prepared under different conditions.When OP-10 was used as an emulsifier,when the emulsifier accounted for 3%of the oil phase,the emulsification speed was 800 rpm,and the core-to-wall ratio was 2∶1,the microcapsules had better performance,the enthalpy value was 115.3 J·g^(-1),the coating efficiency was 79.77%,and the average particle size was 22.31μm.When SDBS was used as an emulsifier,when the emulsifier accounted for 3%of the oil phase,the emulsification speed was 2000 rpm,and the core-to-wall ratio was 1∶1.5,the hot enthalpy value was 77.35 J·g^(-1),the coating efficiency was 53.11%,and the average particle size was 18.67μm.The thermal enthalpy value of the microcapsules obtained by using OP-10 as emulsifier was higher,which was less affected by the preparation conditions,and the thermal properties were relatively stable.The surface morphology of the microcapsules obtained with SDBS as emulsifier was more regular and the yield was higher.
作者
谷亚新
何兴
刘运学
范兆荣
GU Ya-xin;HE Xing;LIU Yun-xue;FAN Zhao-rong(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
出处
《化学研究与应用》
北大核心
2025年第6期1777-1784,共8页
Chemical Research and Application
关键词
石蜡
聚脲
相变微胶囊
乳化剂
paraffin
polyurea
phase change microcapsules
emulsifiers
作者简介
通讯作者:谷亚新(1969-),女,教授,主要从事高分子建筑材料的研究。E-mail:305149745@qq.com。
