Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Enhanced Electric Conductivity of Cement Composites by Functionalizing Graphene Oxide

산화그래핀 기능화에 의한 시멘트 복합체의 전기전도 특성 개선

  • Jung-Geun Han (Department of Civil&Environmental Engineering and Intelligent Energy&Industry, Chung-Ang Univ.) ;
  • Jae-Hyeon Jeon (Department of Civil Engineering, Chung-Ang Univ.) ;
  • Young-Ho Kim (Korea Expressway Corporation) ;
  • Jin Kim (Department of Intelligent Energy&Industry, Chung-Ang Univ.) ;
  • Jong-Young Lee (Office of Research Affairs, Chung-Ang Univ.)
  • Received : 2022.12.29
  • Accepted : 2023.01.30
  • Published : 2023.03.30
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Abstract

This study has utilized self-assembled monolayers technology to improve electrical property of graphene-oxide, which has been seperated graphine powder through a chemical exfoliation. Aluminum sulfate (Al2(SO4)3) was applied on graphene-oxide as a reactant, and the fundamental research was carried out to apply on the self-sensing of cement-based construction structures. Electric resistance measurement result has shown that cement-composites with GO and Al-GO can be used as a conductor, electric resistance of GO and Al-GO contained composites improved by 10.2% and 15.9% respectively when compared to the standard cement-composite. Microstructure analyzation shown the formation of Al(OH)3 gel when Al-GO was added, which is speculated to result the smooth flow of current by improving the density of cement-composite. This implies that graphene-oxide has a possibility to be utilized as smart building materials and construction structure itself rather than just a structure.

본 연구에서는 화학적 박리를 통해 흑연분말로부터 분리한 산화그래핀의 전기적특성을 개선시키기 위해 자가조립단층막 기술을 활용하였다. 반응물질로는 황산알루미늄(Al2(SO4)3)을 적용하였으며, 시멘트를 기반으로 한 건설구조물의 자가센싱에 적용하기 위한 기초연구를 수행하였다. 전기저항 측정결과 대조군인 표준공시체와 대비할 때 GO 및 Al-GO가 함유된 공시체에서 각각 10.2%, 15.9% 개선되어 도체로서의 활용 가능성을 확인하였다. 미세구조분석 결과 Al-GO의 첨가에 따라 Al(OH)3 gel형성을 확인하였으며, 이로 인해 공시체의 밀도를 향상시켜 전류의 흐름을 원활하게 개선시킨 것으로 판단된다. 이는, 단순 구조물이 아닌 구조물 자체로서 활용성을 지닐 수 있음을 시사하며, 스마트 건설자재로서의 가능성을 확인하였다.

Keywords

Acknowledgement

This research was supported by the MSIT(Ministry of Science and ICT), Korea, under the ITRC(Information Technology Research Center) support program(IITP-2020-2020-0-01655) supervised by the IITP(Institute of Information & Communications Technology Planning & Evaluation) and Korea Agency for Infrastructure Technology Advancement under the Ministry of Land, Infrastructure and Transport of the Korean government.(Project Number: 22CTAP-C164339-02)

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