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Structure and properties of self-assembled fluorocarbon-silica nanocomposites

机译:自组装碳氟化合物-二氧化硅纳米复合材料的结构和性能

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摘要

The formation of fluorocarbon-silica nanocomposites by the self-assembly of a fluorinated surfactant and aminoalkoxysilane coupling agents was studied by X-ray diffraction, electron microscopy, NMR spectroscopy and thermal analysis. The prepared materials posses a lamellar nanostructure consisting of non-crystalline fluorinated and condensed silica layers, the latter being very thin. The prepared materials show interesting properties for applications, such as hydrophobicity, thermal stability, high content of aminopropyl groups and low dielectric constant (approximate to 2.8), which is almost independent on frequency. Moreover, the dielectric response can be interpreted in the framework of the Maxwell-Wagner model. (C) 2007 Elsevier B.V. All rights reserved.
机译:通过X射线衍射,电子显微镜,NMR光谱和热分析研究了通过氟化表面活性剂和氨基烷氧基硅烷偶联剂的自组装形成碳氟化合物-二氧化硅纳米复合材料。所制备的材料具有由非晶态氟化和凝结二氧化硅层组成的层状纳米结构,后者非常薄。所制备的材料显示出令人感兴趣的应用性能,例如疏水性,热稳定性,高氨基丙基含量和低介电常数(约2.8),这几乎与频率无关。此外,可以在Maxwell-Wagner模型的框架中解释介电响应。 (C)2007 Elsevier B.V.保留所有权利。

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