以液相滲入及快速碳化製程摻雜奈米碳管及石墨烯對針軋三維碳/碳複合材料之性質研究

Study of Carbon Nanotubes and Graphene Doping on Three-Dimensional Needled Carbon/Carbon Composites Prepared Through Liquid Infiltration and Fast Carbonization Process

李牧洲(Mu-Chou Lee)

指導教授 ： 李國榮

義守大學/理工學院/材料科學與工程學系/碩士(2015年)

https://doi.org/10.6343/ISU.2015.00243

摘要

本研究嘗試以針軋碳纖維布之方式製作碳纖維骨架，接著將碳纖維骨架含浸添加不同比例之奈米碳管、石墨烯之液相酚醛樹脂混合含浸液，經過含浸、熱壓、碳化等製程後製備成多孔性預型材。後續再分別以緻密化循環及直接含浸之含浸方式製作碳/碳複合材料，藉此探討含浸液中所添加奈米碳管及石墨烯比例差異、含浸方式及石墨化製程對試片各項性質之影響。
實驗結果顯示，添加奈米碳管及石墨烯均可提升碳/碳複合材料試片之機械性質、熱傳導性質及磨耗性質，且隨著添加量增加，對試片各項性質之影響更為顯著。而經緻密化循環製程所製成之各類試片，其各項性質之表現皆優於採直接含浸製程之試片。另外由緻密化循環製程所製成之試片再進行石墨化過程後，試片之機械性質呈現些微下降，但是其熱傳導性質及磨耗性質則明顯的提升。此外添加奈米碳管及石墨烯均可提升碳/碳複合材料試片之石墨化程度，且隨著添加量增加，石墨化程度也會有所提升，其中添加石墨烯之試片，其石墨化程度會優於添加奈米碳管之試片。

關鍵字

奈米碳管 ； 石墨烯 ； 碳/碳複合材料 ； 液相含浸 ； 快速碳化 ； 石墨化

並列摘要

This study begins to fabricate carbon fiber skeletons by needled punch method. Secondly, the impregnation process was operated through the vacuum impregnation method and carbon fiber skeletons were impregnated with liquid phenolic resin doped different proportions of carbon nanotube and graphene. After impregnation, hot pressing and carbonization processes were adopted to prepare porous carbon performs. Subsequent densification cycles and impregnation processes were adopted to fabricate the carbon/carbon composites respectively. The objective of this study is to investigate interrelationships among adding proportions of carbon nanotube and graphene, impregnation method, graphitization process and properties of carbon/carbon composites.
The results indicate that, addition of carbon nanotube and graphene can enhance the mechanical, wear and thermal conductive properties of the specimens. Properties of the specimens were improved significantly as the additive amount of carbon nanotube and graphene increased. The performances of specimens prepared through densification cycle processes were superior to those specimens prepared through repeatedly impregnation method. The mechanical properties of the specimens prepared through densification cycle process with further graphitization process will decrease slightly. However, the wear and thermal conductive properties of these specimens were improved significantly. Furthermore, graphitization drgree of specimens were enhance significantly with the addition of carbon nanotube and graphene. Especially, specimens added with graphene showed better graphitization drgree than that of specimens added with carbon nanotube.

並列關鍵字

carbon nanotube ； graphene ； carbon/carbon composite ； liquid infiltration ； fast carbonization ； graphitization

參考文獻

[10]. 游源祥， “石墨烯-高分子奈米複合材料”，化學，第七十卷，第一期，2012年，第53-67頁。

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