화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.39, No.6, 909-916, November, 2015
DOI10.7317/pk.2015.39.6.909  Export Citation
탄소나노튜브 표면 관능기가 탄소나노튜브/고분자 복합재료의 기계적 및 열적 특성에 미치는 영향
Influence of Functional Groups on the Surface of Carbon Nanotube on Mechanical and Thermal Properties of Carbon Nanotube/Polymer Composites
함은광1, 2, 최웅기1, 김영근3, 서민강1, †
  • 1한국탄소융합기술원
  • 2전주대학교 탄소융합공학과
  • 3(주)윈앤윈
Eun-Kwang Ham1, 2, Woong-Ki Choi1, 3, Young-Keun Kim4, and Min-Kang Seo1, 3, †
  • 1Korea Institute of Carbon Convergence Technology, Jeonju 561-844, Korea
  • 2Department of Carbon Fusion Engineering, Jeonju University, Jeonju 560-759, Korea
  • 3, Korea
  • 4Win&Win Archery, Anseong 465-931, Korea
E-mail:
초록
본 연구에서는 탄소나노튜브 관능기의 형태가 탄소나노튜브/고분자 복합재료의 기계적 및 열적 특성에 미치는 영향에 관하여 알아보았다. 탄소나노튜브의 관능기를 정량적으로 분석하기위해 X-선 광전자 분광법을 사용하였다. 복합재료는 에폭시 수지와 비닐 에스터 수지에 산처리된 탄소나노튜브를 0.7 wt%를 첨가하여 제작하였다. 실험결과, 탄소나노튜브/에폭시 복합재료는 8 M 질산으로 처리된 탄소나노튜브를 첨가하였을 때 가장 높은 기계적 특성을 나타내었으며, 탄소나노튜브/비닐 에스터 복합재료는 황산/질산 혼합액으로 처리된 탄소나노튜브를 첨가하였을때 기계적 특성이 향상됨을 알 수 있었다. 열전도도는 에폭시와 비닐 에스터에 8 M 질산으로 처리된 탄소나노튜브가 첨가되었을 때 향상되었다. 이는 탄소나노튜브에 카보닐기(C=O)의 도입으로 탄소나노튜브/에폭시 복합재료의 계면접착력이 개선되었으며, 카복시기(O-C=O)의 증가는 탄소나노튜브/비닐 에스터 복합재료의 기계적 물성 향상에 기여하였다. 또한 탄소나노튜브/에폭시 복합재료와 탄소나노튜브/비닐 에스터 복합재료의 열전도도는 탄소나노튜브의 표면구조와 길이에 영향을 받는다고 판단된다.
The influence of carbon nanotube (CNT) functional groups on mechanical and thermal properties of CNT/polymer composites was investigated. The functional groups of the CNT were quantitatively analyzed using X-ray photoelectron spectroscopy. The composites were prepared by adding the 0.7 wt% acid-treated CNT in the epoxy resins and vinyl ester resins, respectively. As a result, the CNT/epoxy composites showed the highest tensile and flexural properties upon adding the 8 M HNO3-treated CNT. Tensile and thermal properties of the CNT/vinyl ester composites were improved by adding H2SO4/HNO3-treated CNT. Thermal conductivities of CNT/epoxy composites and CNT/vinyl ester composites were improved in 8M HNO3-treated CNT. The introduction of carbonyl group (C=O) on CNT led to improvement of interfacial bonding in CNT/epoxy composites. The increase in the content of carboxyl group (O-C=O) on CNT contributed to increase in mechanical properties of CNT/vinyl ester composites. Also, the thermal conductivity of CNT/epoxy composites and CNT/vinyl ester composites were probably influenced by the structure and length of the CNT.
Keywords:carbon nanotubes;functional groups;mechanical properties;thermal properties;CNT/polymer composites.
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