촉매에 따른 다양한 탄소나노구조체 합성
Fabrication of various carbon nanostructures by using different catalysts
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초록
탄소 섬유소재는 가벼우면서고 강건한 특성과 화학적 안정성 등으로 인해 항공기, 자동차, 레저, 우주항공, 풍력,연료전지, 방위 산업 등의 분야를 비롯하여 최근에는 다양한 산업용 복합재료 및 보강용 분야에서 많이 사용되고 있다. 본연구에서는 탄소섬유의 기능성 향상 및 다양한 응용 분야 확대를 위하여 물리적, 화학적 특성이 우수한 탄소나노튜브와 같은 다양한 탄소나노구조체를 탄소섬유상에 하이브리드화 하는 연구를 진행하였다. ELP(Electroless plating)법을 이용하여 탄소섬유 표면처리 및 촉매 입자 형성을 동시에 진행하였으며, Thermal CVD법을 이용하여 탄소나노구조체를 형성한 결과,탄소섬유상 Pd/Ni 복합 촉매의 비율에 따라서 탄소나노튜브, 탄소나노필라멘트 등 다양한 형태의 탄소섬유상 탄소나노구조체가 형성되는 것을 알 수 있었다. Pd촉매의 비율이 높을 수록 다중벽 탄소나노튜브(Multiwall carbon naotube)의 생성 비율이 높아지고, Ni촉매의 비율이 상대적으로 증가할 수록 탄소나노필라멘트(Carbon nanofilament)의 생성 비율이 높아짐을 알수 있었다.
Abstract
Carbon fiber has many potential applications in a wide array of fields of solar cell, fuel cell, batteries, and polymer matrix composites due to an exceptional mechanical properties and chemical stability. In this study, the effects of catalysts on the property of carbon nanostructures grown on the carbon fiber were systematically investigated. The surface treatment of carbon fiber and catalysts synthesis for carbon nanostructures growth were carried out by one-pot ELP method and thermal CVD, respectively. The surface morphology and crystal structure of carbon nanostructures were examined using a field emission scanning electron microscope and transmission electron microscope. Depending on the type of catalysts and the molar ratio, various types of carbon nanostructures like carbon nanotube, carbon nanofilament, carbon nanospring and etc. were synthesized on the surface of carbon fibers surface.
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