自從飯島澄男博士Sumio Iijima在1991年發現奈米碳管以來，許多高分子奈米複合材料的研究就有如雨後春筍般蓬勃發展起來。奈米碳管不僅擁有著傑出的物理性能，更可以與高分子材料複合來提高複合材料的彈性模數E和硬度H等機械性能。爾後在2004年A. K. Gei和Novoselov K. S. 用3M膠帶機械剝離的方式從天然石墨裡製備出石墨烯。這個劃時代的新材料有著絕佳、特殊的物理性質，石墨烯不僅開啟了一個新的凝態物理研究領域，更因為石墨烯可以良好均勻地分散在各種聚合物當中，使得它在高分子複合材料當中開創了一個嶄新的視野與許多應用的未來。
在本文中，我們對奈米碳管/環氧樹脂和石墨烯/環氧樹脂複合材料的力學性質進行研究。我們使用高壓均質機和三輥輪研磨機來分散奈米碳管（CNT）和膨脹性石墨烯薄層（EGNP）至環氧樹脂當中。用微拉曼光譜來驗證石墨烯薄層/環氧樹脂的結構特性。接著我們用奈米壓痕機來量測奈米碳管 /環氧樹脂和石墨烯/環氧樹脂的機械性質。奈米碳管與石墨烯能提升高分子材料其彈性模數與硬度。在低濃度的時候，奈米碳材能夠大大地提升聚合物之機械性能，但當濃度越來越高時，奈米碳材就越難均勻分散在基材當中，所提升之效益非我們所預期的一樣。另外也進行了關於石墨烯/環氧樹脂的黏彈性行試驗，來了解此奈米複合材料之黏彈性的行為。添加了石墨烯的環氧樹脂，其潛變位移也有減少的趨勢。

Since Iijima discovered carbon nanotubes in 1991, many studies on the polymer nanocomposites has been mushroomed at recent years. Carbon nanotube has improved the physical properties of polymers. The mechanical properties of nanocomposites such as the elastic modulus, E, and the hardness, H has had a significant improvement. Then, in 2004, A.K. Geim and K.S. Novoselov separated graphene from graphite by mechanical cleavage, the extraordinary physical properties and ability to be dispersed in various polymer matrices has created a new field of polymer nanocomposites, an extensive research in the field has been initiated.
In this study we investigate the influence of nano-carbon reinforcements on mechanical properties of carbon nanotube/epoxy and graphene nanoplatelets/epoxy composites. Carbon nanotube (CNT) and expanded graphene nanoplatelets (EGNP) were dispersed within epoxy resins using a high pressure processor and a three roll milling. Characteristics on EGNPs/epoxy was confirmed with micro-Raman spectroscopy.
Nano-indentation test was performed on the nano-composites. The interction of CNT and EGNP improved the modulus and hardness of the composite. However, a significant increase of mechanical properties was seen at the low nano-carbon content, but it is more and more difficult to disperse homogeneously with higher concentrations. Also the viscoelastic behavior of graphene nanoplatelets/epoxy composites is examined by the nano- indentations test .

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