Abstract

Graphene oxide as a derivative of graphite has been noticed as a high efficient material and its application in nanocomposite coatings is surprisingly increased. In this research, surface modification of graphene oxide using 3-aminopropyltriethoxysilane, as an aminic modifier, was done. Coating compositions based on polydimethylsiloxane containing graphene oxide and also modified graphene oxide were formulated and interaction of graphene oxide derivatives with siloxane polymer was evaluated using Fourier transform infrared spectroscopy – attenuated total reflectance, scanning electron microscopy, Atomic Force Microscopy, Raman spectroscopy and X-Ray Diffraction methods. Also thermogravimetric analysis and water contact angle tests were used for evaluation of thermal properties and hydrophobicity of resultant coatings, respectively. Results confirmed the interaction of graphene oxide with aminic modifier. Also, the presence of modified graphene oxide derivatives in the formulations led to the increase of thermal properties and hydrophobicity of the resultant coatings and the increase of these properties for formulations containing modified graphene was much greater and more pronounced.

中文翻译：

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改性氧化石墨烯和聚二甲基硅氧烷的纳米复合涂料的表征和热性能

摘要

氧化石墨烯作为石墨的衍生物已被视为一种高效材料，其在纳米复合涂料中的应用令人惊讶地增加了。在这项研究中，使用3-氨基丙基三乙氧基硅烷作为胺类改性剂对氧化石墨烯进行了表面改性。配制了基于含有氧化石墨烯和改性氧化石墨烯的聚二甲基硅氧烷的涂料组合物，并使用傅里叶变换红外光谱法（衰减全反射率，扫描电子显微镜，原子力显微镜，拉曼光谱和X射线）评估了氧化石墨烯衍生物与硅氧烷聚合物的相互作用衍射法。同样，热重分析和水接触角测试分别用于评估所得涂层的热性能和疏水性。结果证实了氧化石墨烯与胺改性剂的相互作用。而且，在制剂中改性石墨烯氧化物衍生物的存在导致所得涂层的热性能和疏水性的增加，并且对于含有改性石墨烯的制剂的这些性能的增加是更大和更明显的。