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    한국섬유공학회지, Vol.54, No.3, pp. 209-216, 2017
    아민 기능화된 탄소나노튜브의 분산상태 및 표면자유 에너지 변화가 탄소나노튜브/탄소섬유강화 복합소재의 기계적 특성에 미치는 영향
    Effects of Dispersive Condition and Surface Free Energy Change of MWCNT on Mechanical Properties of Amino-functionalized MWCNT/Carbon Fibers-reinforced Epoxy Composites
     
    최웅기 · 박길영 · 신홍석 · 국윤수 · 김병석 · 서민강
     
    In this work, the effects of the dispersive condition and surface energy change of multi-walled carbon nanotube (MWCNT) on the mechanical properties of amino-functionalized MWCNT containing carbon fibers-reinforced epoxy composites were studied. Amino-functionalization of MWCNT was carried out by grafting spermidine and p-phenylenediamine onto the surfaces of MWCNT through amidation. The surface properties of the MWCNT before and after amidation were observed using scanning electron microscope (SEM), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscope (XPS), microscope, and contact angle measurements. Theoretical interfacial adhesions between the MWCNT and the epoxy resins were studied by calculating the work of adhesion and demonstrated by interlaminar shear strength (ILSS). From the experimental results, it was found that amino-functionalized MWCNT showed quite a homogeneous dispersion state in epoxy matrix resins. Additionally, the interfacial adhesions could be improved by aminofunctionalizing MWCNTs surfaces. Consequently, the introduction of an amino-functional group on MWCNT surfaces positively affected the dispersibility of MWCNT, which resulted in improving the mechanical properties of the carbon fibers-reinforced epoxy composites.
     
    Keywords : multi-walled carbon nanotube, amino-functionalization, carbon fibers-reinforced composites, dispersion, interfacial adhesion, surface free energy
    DOI : https://doi.org/10.12772/TSE.2017.54.209
     
    Full text(PDF)  아민 기능화된 탄소나노튜브의 분산상태 및 표면자유 에너지 변화가 탄소나노튜브/탄소섬유강화 복합소재의 기계적 특성에 미치는 영향