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다중벽 탄소나노튜브 강화 에폭시 복합재료에 플라즈마 처리가 미치는 영향
유재상(Jaesang Yu),정하나(Hana Jung),김연직(Yonjig Kim),최회길(Hoi Kil Choi),오유나(Yuna Oh) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
Plasma treatment methodology is widely used to functionalize the surfaces of nanofillers in order to enhance elastic, thermal and electrical properties of composites. In this study, plasma process of two types was employed for nitrogen doping on the surface of multiwalled carbon nanotube (MWCNT). First, nitrogen doping on MWCNTs was carried out in a horizontal quartz tube using N2 plasma at the powers of 100 W for 10 min. Second, MWCNTs were surface-modified with plasma treatments using nitrogen by nanocular instrument of 50mA for 1hr. The influence of the doping on the structure of CNTs was studied using XPS and Raman spectroscopy. N-doped MWCNT reinforced epoxy composites were fabricated and tested to investigate the effect of functionalized surfaces of MWCNTs. FE-SEM was used to confirm the dispersion and interphase of MWCNTs. In addition, quasi-static tensile tests were performed to examine the effect of various weight contents of MWCNTs, 0 to 1.0 wt%, on determining the bulk elastic composite properties.
남기호,유재상,유남호,한학수,구본철,Nam, Ki-Ho,Yu, Jaesang,You, Nam-Ho,Han, Haksoo,Ku, Bon-Cheol 한국복합재료학회 2017 Composites research Vol.30 No.5
고분자 복합재료는 유기 중합체인 고분자 수지를 기지로 다양한 충전제를 균일하게 분산시킨 소재로서 가공성이 우수하며 제품의 다양성이 많은 특징이 있다. 최근에는 탄소 나노소재들이 개발됨에 따라 이를 보강재로 활용하여 보다 우수한 복합재료를 개발하기 위한 많은 노력이 있다. 보강재 본래의 특성을 최대한 복합재료로 전환시키기 위해서는 이들의 분산, 배향 및 계면특성이 매우 중요하게 여겨진다. 본 총설 논문에서는 그래핀 기반 폴리이미드 복합재료의 고강도화 및 고인성화 기술 전략으로써 그래핀 기능화에 의한 표면 화학구조와 물성간 상관관계를 도출하고 설명하고자 한다. Polymer composites are materials in which various fillers are uniformly dispersed on the basis of organic resin. They have excellent processability and diversity for industrial products. Recently, as carbon nanomaterials are developed, there is a great deal of effort to use them as reinforcing fillers to fabricate high performance composite materials. In order to transfer the inherent properties of fillers into composite materials as much as possible, the good dispersion and orientation of fillers, and favorable interfacial interaction between fillers and matrix are considered to be very important. In this review article, we intent to derive and explain the relationship between surface chemical structure of fillers and physical properties of composites as a strategy of high strength and toughness of graphenebased polyimide composites.
실리카 퓸을 이용한 자동차용 탄소섬유강화복합재의 인성 강화
임성묵,유재상,이원오,Lim, Sungmook,Yu, Jaesang,Lee, Wonoh 한국교통대학교 융복합기술연구소 2018 융ㆍ복합기술연구소 논문집 Vol.8 No.1
The age of electric vehicle is coming. One of the most important problems to be solved for popularization of electric vehicle is fuel economy. To increase fuel economy of electric vehicles, it is necessary to improve the performance of the battery or the car body should be lighter than now. To solve the problem of the car body, change the car body's material to carbon fiber reinforced composites can be an excellent answer. However, the part made from carbon fiber reinforced composites is vulnerable to accidents due to their high brittleness. In this study, ductile silica fume was added into the carbon fiber composites to enhance toughness. To examine this, various amounts and sizes of silica fume were considered and the toughness enhancement was examined by performing tensile tests.