Influence of pyrogenic particles on the micromechanical behavior of thin sol-gel layers.
Influence of pyrogenic particles on the micromechanical behavior of thin sol-gel layers.
复制标题
热解颗粒对薄溶胶-凝胶层微机械行为的影响。
DOI：
10.1021/la200756r
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Kwade
中科院分区：
文献类型：
--
作者：
B. Schönstedt;G. Garnweitner;N. Barth;A. Mühlmeister;A. Kwade
基于Sol-Gel技术制备了不同类型纳米粒子嵌入到Sol-Gel基质中的涂层，并对涂层的性能进行了研究。包覆前，在溶胶中加入热解二氧化硅纳米颗粒。二氧化硅颗粒的一次粒径和团聚尺寸不同，表面改性程度也不同。这些颗粒在乙醇中被浸湿，并分散到一定的细度。凝聚体大小的差异部分是由不同的颗粒类型造成的，但也是由于应用于颗粒的分散过程。对所得涂层进行了外观观察和扫描电子显微镜观察。此外，通过纳米压痕测试了它们的微观力学性能。结果表明，纳米粒子的加入及其性质对溶胶-凝胶涂层的视觉外观和微观力学行为有重要影响。结果表明，颗粒大小分布对涂层性能和表面改性有很大影响。
Coatings based on sol-gel technology with different types of nanoparticles embedded into the sol-gel matrix were fabricated, and the resulting properties were investigated. Pyrogenic silica nanoparticles were added to the sol before coating. The silica particles varied in primary particle size and agglomerate size, and in their surface modification. The particles were wetted in ethanol and dispersed to certain finenesses. The difference in agglomerate size was partly caused by varying particle types, but also by the dispersing processes that were applied to the particles. The resulting coatings were examined by visual appearance and SEM microscopy. Furthermore, their micromechanical properties were determined by nanoindentation. The results show an important influence from the added nanoparticles and their properties on the visual appearance as well as the micromechanical behavior of the sol-gel coatings. It is shown that, in fact, the particle size distribution can have a major impact on the coating properties as well as the surface modification.