肉豆蔻酸-十四醇/二氧化硅复合相变材料的制备及性能研究  

Preparation and properties of MA-TD/SiO_2 composite phase change materials

作　　者：刘晓 孙志高[1,2] 李娟 李翠敏[1] 黄海峰[1] LIU Xiao;SUN Zhigao;LI Juan;LI Cuimin;HUANG Haifeng(School of Environmental Science and Engineering, Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Province Key Laboratory of Intelligent Building Energy Efficiency,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]江苏省建筑智慧节能重点实验室,江苏苏州215009

出　　处：《功能材料》2018年第10期145-149,154,共6页Journal of Functional Materials

基　　金：江苏省高校自然科学研究重大资助项目(16KJA480001);江苏省自然科学基金资助项目(BK20170382);江苏省住建厅科技资助项目(2016ZD134);苏州市建设科研资助项目(2017-20)

摘　　要：利用肉豆蔻酸(MA)和十四醇(TD)复合制备出二元共熔混合物作为储能基元,以二氧化硅作为载体材料,采用溶胶-凝胶法制得MA-TD/SiO_2定形复合相变材料。在70℃温度条件下,采用扩散-渗透圈法确定MATD相变材料和正硅酸乙酯(TEOS)的最佳质量配比为1∶2。扫描电镜(SEM)观测发现复合相变材料外观近球形,储能基元被固定到SiO_2多孔网络中;DSC检测结果表明复合相变材料的相变起始温度为23.46℃,相变潜热为83.07kJ/kg;红外光谱(FT-IR)测试结果显示相变材料和SiO_2之间为物理复合,未出现新物质;300次0～60℃冷热循环后MA-TD/SiO_2复合相变材料的失重率仅为0.67%,具有良好的热稳定性。The binary eutectic mixture was prepared by combining myristic acid(MA)and tetradecyl alcohol(TD)as an energy storage element.Using the sol-gel method,MA-TD/SiO 2 composite phase change material was prepared with silica as carrier material.The optimum mass ratio of MA-TD phase change material and tetraethyl orthosilicate(TEOS)is 1∶2,determined by diffusion-penetration method at the temperature of 70℃.The result of scanning electron microscopy(SEM)shows that the appearance of composite phase change material is nearly spherical and energy storage elements are fixed to the SiO 2 porous network.The DSC test results show that the initial phase transition temperature of the composite phase change material is 23.46℃and the phase change latent heat is 83.07 kJ/kg.The FT-IR test presents that PCM and SiO 2 are physically complexed and no new material appears.The weight loss rate of MA-TD/SiO 2 composite phase change materials is only 0.67%after 300 cycles between 0 and 60℃,which indicates that it has good thermal stability.

关 键 词：定形复合相变材料 溶胶-凝胶法 SIO2 热稳定性 

分 类 号：TB34[一般工业技术—材料科学与工程]