矽氧烷偶合劑修飾石墨烯之分散與應用

Silane Chemically Modified Graphene sheets and Application

林秀貞(Hsiu-Chen Lin)

指導教授 ： 張淑美

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2011年)

摘要

石墨烯是一種二維蜂窩狀的晶格結構，呈現正六邊形網狀結構，具有良好導電性與導熱性等特點。由於石墨烯之間存在較強的凡得瓦力，容易互相吸引而發生團聚現象。故本研究以矽氧烷偶合劑修飾於石墨烯之表面上，改善石墨烯的分散性。
首先研究石墨烯表面處理，以矽氧偶合劑來達到改質效果。利用Hummers method氧化石墨烯(Graphene Oxide,GO)，使其含有大量含氧官能基，利用化學插層方式接枝不同碳數烷基鏈的矽氧偶合劑，修飾氧化石墨烯表面，並使用還原劑除去表面含氧官能基，探討不同碳鏈矽氧烷修飾的石墨烯，分散在有機溶劑穩定性。而後將改質過後石墨烯混摻於矽膠樹脂基材中，探討其對於熱導係數的影響。藉由傅立葉轉換紅外光譜儀(FT-IR) 、熱重量分析儀(TGA)、紫外光/可見光光譜儀(UV-vis)、X-光粉末繞射儀(XRD)、拉曼光譜儀(Raman)、X-光光電子能譜儀(XPS)、掃描式電子顯微鏡(SEM)、熱傳導分析儀(Hot disk)鑑定樣品之特性。

關鍵字

石墨烯 ； 矽氧烷偶合劑 ； 分散性

並列摘要

Graphene is a flat monolayer of carbon atoms tightly packed into a two-dimensional (2D) honeycomblattice.Graphene oxide is nonconductive and has to be reduced and deoxygenated to gain conductive graphene.However,during the reduction process,the graphene oxide can be easily aggregated into graphite again. The organic functionalization of GO is proved to be effective to prevent the aggregation during reduction.
In this study,silane-functionalized graphene in organic solvent was prepared by combining the Hummer process for graphene Oxide and reduction approach. The organophilic products were characterized by FT-IR,TGA ,UV-vis ,XRD, Raman, XPS and SEM.The effect of theraml conductivity of silane-functionalized graphene hybrid filler/silicon composite.

並列關鍵字

Graphene ； silane coupling agent ； dispersions

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