DOI QR코드

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Carbon Nano Tube 및 산화그래핀을 첨가한 폴리우레아 복합재 제조 및 그 화학적 특성 분석

Understanding Interfacial Charge Transfer Nonlinearly Boosted by Localized States Coupling in Organic Transistors

  • 김형태 (경상국립대학교 나노신소재공학부) ;
  • 이지현 (경상국립대학교 나노신소재융합공학과) ;
  • 안우진 (경상국립대학교 기계공학부) ;
  • 박준홍 (경상국립대학교 나노신소재공학부)
  • Kim, Hyeongtae (School of Materials Science and Engineering, Gyeongsang National University) ;
  • Lee, Jihyun (Department of Materials Engineering and Convergence Technology, Gyeongsang National University) ;
  • An, Woo-Jin (School of Mechanical Engineering, Gyeongsang National University) ;
  • Park, Jun Hong (School of Materials Science and Engineering, Gyeongsang National University)
  • 투고 : 2021.11.19
  • 심사 : 2021.12.24
  • 발행 : 2021.12.31

초록

폴리우레아 소재는 폴리우레탄 화학결합과 높은 유사성을 가지고 있으면서, 높은 기계적 강성 및 탄성을 가지고 있어 경량 복합재의 고분자 기지 상으로 연구되어 왔다. 본 연구에서는 이방성을 가진 CNT (carbon nanotube)와 GO (graphene oxide)를 폴리우레아 기지 상에 첨가하여 제작한 복합재를 제작하였고 그 특성을 분석하였다. 원자힘현미경 이용해 CNT와 GO의 각각 1차원의 선형 및 2차원의 층상의 이방성을 확인한 후, 5 wt%으로 각각 폴리우레아 Resin에 혼합 후 cross-link 형성 및 건조 과정을 거쳐 복합재를 제작하였다. FTIR과 Raman 분광법을 이용해 제조한 CNT/폴리우레아와 GO/폴리우레아 복합재의 화학적 구조를 분석하였다. 그 결과, 폴리우레아와 첨가물의 화학결합 변화없이 혼합된 것이 확인되었다. 전자현미경을 이용해 첨가제/폴리우레아/유리섬유 직물 복합재의 표면과 단면에서의 CNT와 GO의 분포를 관찰하였다. 인장 강도 시험 결과, 1 wt%의 CNT와 GO가 첨가된 폴리우레아의 경우 인장강도 향상이 관측되었다.

Polyurea has been investigated as a polymer matrix for composite materials because of its high mechanical strength. Although polyurea has a similar chemical structure to polyurethane, it has much higher strength and durability. In this study, the fabrication of polyurea composites reinforced with carbon nanotube (CNT) and graphene oxide (GO) is demonstrated to enhance the tensile strength of the glass fibers composite. Using FTIR and Raman spectroscopies, the chemical structures of polyurea, CNT, and GO are investigated. As a result, spectroscopy analysis reveals that the chemical structure of CNT, GO, and polyurea is maintained during the fabrication of the composite structure. Scanning electron microscopy reveals the uniform distribution of CNT and GO across the polyurea matrix. The reinforcement of 1 wt% CNT in polyurea enhances the tensile strength of CNT/polyurea composites. In contrast, the reinforcement of GO in polyurea induces the degradation of the tensile strength of GO/polyurea composites.

키워드

과제정보

본 연구는 2021년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기반 지역혁신 사업(2021RIS-003) 과 사회맞춤형 산학협력 선도대학(LINC+) 육성사업의 결과입니다.

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