Application of tailored silica microspheres in coatings: synthesis, characterization, thermal and hydrophobic properties
Application of tailored silica microspheres in coatings: synthesis, characterization, thermal and hydrophobic properties
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DOI：
10.1039/c3ta12024d
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发表时间：
2013-08
影响因子：
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通讯作者：
Meng Wang;Zeng Qiqi;Bin Zhao;D. He
中科院分区：
文献类型：
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作者：
Meng Wang;Zeng Qiqi;Bin Zhao;D. He
使用 CTAB 作为软模板合成定制的二氧化硅微球，例如实心、介孔二氧化硅微球、实心二氧化硅核/介孔二氧化硅壳(sSiO2@mSiO2)微球和空心二氧化硅微球。通过 SEM、TEM、XRD 和 BET 对制备的样品进行了表征。实验结果还提出了形态演化机制，揭示了实心介孔二氧化硅微球、实心二氧化硅核/介孔二氧化硅壳（sSiO2@mSiO2）微球和空心二氧化硅微球的形成过程。然后制备由四种代表性二氧化硅颗粒组成的二氧化硅/硅树脂涂料。相应的 FT-IR、UV-Vis 光谱和表面水润湿性测试表明，由其他三种二氧化硅颗粒组成的涂层比固体 SiO2 微球的涂层具有更好的性能。由介孔SiO2组成的涂料具有最好的隔热保温性能和疏水性能。还分析了涂层的顶视图和横截面SEM图像以及AFM图像，以解释涂层的表面形貌、膜厚度、表面粗糙度等因素及其相关性能之间的关系。
Tailored silica microspheres were synthesized using CTAB as a soft template, e.g. solid, mesoporous silica microspheres, solid silica core/mesoporous silica shell (sSiO2@mSiO2) microspheres and hollow silica microspheres. The prepared samples were characterized by SEM, TEM, XRD, and BET. The mechanism of morphological evolution was also proposed based on the experimental results, which reveals the formation processes of solid, mesoporous silica microspheres, solid silica core/mesoporous silica shell (sSiO2@mSiO2) microspheres and hollow silica microspheres. Then silica/silicon resin coatings consisting of the four representative silica particles were prepared. The corresponding FT-IR, UV-Vis spectra and surface water wettability test showed better performance for coatings comprised of the other three silica particles than that of solid SiO2 microspheres. Coatings comprised of mesoporous SiO2 had the best performance of heat insulation and heat preservation and hydrophobic property. The top-view and cross-sectional SEM images and the AFM images of the coatings were also analyzed to explain the relationship between factors such as surface morphology, film thickness, surface roughness of the coating and its related properties.