| Preparation and characterization of silica microcapsules containing butyl-stearate via sol-gel method |
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| 作者姓名： | 缪春燕 姚有为 唐国翌 翁端 |
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| 作者单位： | [1]Graduated School at Shenzhen, Tsinghua University, Shenzhen 518055, China [2]Department of Materials Science and Engineering, Tsinghua University, Beijing 100086, China |
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| 基金项目： | Project（50572045） supported by the National Natural Science Foundation of China; project supported by Innovation Fund from the PetroChina Company Limited |
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| 摘 要： | 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 3-7 μm and the median diameter of these microcapsules equals to 5.2μm. 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.
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| 关 键 词： | 二氧化硅微囊体 溶胶-凝胶法 硬脂酸丁酯 相变材料 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Preparation and characterization of silica microcapsules containing butyl-stearate via sol-gel method |
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| MIAO Chun-yan, YAO You-wei, TANG Guo-yi, WENG Duan.Preparation and characterization of silica microcapsules containing butyl-stearate via sol-gel method[J].Transactions of Nonferrous Metals Society of China,2007,17(A02):1018-1021. |
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| Authors: | MIAO Chun-yan YAO You-wei TANG Guo-yi WENG Duan |
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| Abstract: | |
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| Keywords: | silica microcapsules sol-gel butyl-stearate phase change materials |
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