奈米碳管/高分子預浸材積層板複合材料之機械與電性質研究

Mechanical and Electrical Properties of Carbon nanotubes / Epoxy Resin Nano-Prepreg Laminates for Nanocomposites

王國書(Kuo-Shu Wang)

指導教授 ： 葉銘泉

國立清華大學/工學院/動力機械工程學系/碩士(2007年)

摘要

現今由於奈米碳管具有質量輕、導電性、高熱傳導度及熱穩定性等特殊物理特性以及許多潛在的應用如航空、航太、電磁波遮蔽(EMI)材料及靜電釋放材料(ESD)等上。本研究旨在利用奈米碳管進行表面改質，使其具有可反應的官能基。並利用超音波震盪的方式將奈米碳管分散於環氧樹脂基材，並將此高分子基材與碳纖維製備成奈米高分子預浸材積層板(Nano-prepreg Laminates)。並探討添加不同比例的奈米碳管對積層板之機械性質、導電性、電磁波遮蔽效率與疲勞壽命，並觀察材料遭受到不同溫度環境下材料的抵抗能力。結果顯示積層板之機械強度、電性質與電磁波遮蔽效率皆隨著奈米碳管含量增加而增加。在溫度熱循環地方由於基材和纖維間的膨脹係數不匹配導致強度隨週次增加而降低。在相同之疲勞壽命下，添加奈米碳管之積層板的絕對應力比碳纖維/環氧樹脂積層板高。最後利用SEM觀察奈米積層板之破壞面，討論材料的破壞機制。

關鍵字

奈米碳管 ； 積層板 ； 機械 ； 電性質

並列摘要

Carbon nanotubes have special physical characteristics, such as light weight, electrical conductivity; highly thermal conductivity degree and thermal stability, etc. So there is a lot of potential application such as the aviation , aerospace, electromagnetic interference (EMI) material and electrostatic discharge (ESD),etc. In this paper, carbon nanotubes are treated with oxidizing in organic acids, and the surface modification of the nanotubes improve the quality of mechanical properties for nanocomposites. Carbon nanotubes dispersed into epoxy resin via sonication method and prepared nano-prepreg laminates with polymer matrix and carbon fiber. We investigate the properties of laminates consisting of adding different proportions of carbon nanotubes to the laminates for mechanical properties, electrical conductivity, electromagnetic interference shielding effectiveness and fatigue life, and observe the ability of resisting that materials suffer to the treated material under different temperature environments. The experimental result shows that mechanical strength, electrical conductivity and electromagnetic interference shielding effectiveness increases as the weight percentage of the carbon nanotube increases. In the experiment of thermal cycles treatment, because the coefficient of thermal expansion between the fibers and matrix is not the same, it cause the intensity to reduce with the cycles increased. In the same fatigue life, the absolute stress of carbon nanotube/laminate is higher than carbon fiber/epoxy laminate. Morphologies for the fracture surface of nano-prepreg laminate are observed by scanning electron microscope(SEM).

並列關鍵字

carbon nanotubes ； Laminates ； Mechanical ； Electrical

參考文獻

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