Preparation and characterization of silica microcapsules containing butyl-stearate via sol-gel method
For thermal energy storage application in energy-saving building materials,silica microcapsules containing phase change material were prepared using sol-gel method in O/W emulsion system.In the system droplets in microns are formed by emulsifying an organic phase consisting of butyl-stearate as core material.The silica shell was formed via hydrolysis and condensation from tetraethyl silicate with acetate as catalyst.The SEM photographs show the particles possess spherical morphology and core-shell structure.The as-prepared silica microcapsules mainly consist of microsphere in the diameter of 37 μm and the median diameter of these microcapsules equals to 5.2 μm.The differential scanning calorimetry (DSC) curves indicate that the latent heat and the melting point of microcapsules are 86 J/g and 22.6 ℃,respectively.The results of DSC and TG further testify the microcapsules with core-shell structure.
silica microcapsules sol-gel butyl-stearate phase change materials
MIAO Chun-yan YAO You-wei TANG Guo-yi WENG Duan
Graduated School at Shenzhen,Tsinghua University,Shenzhen 518055,China;Department of Materials Scien Graduated School at Shenzhen,Tsinghua University,Shenzhen 518055,China Department of Materials Science and Engineering,Tsinghua University,Beijing 100086,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）