Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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A New Study of Sensing and Optimum Preparation Conditions of Graphite/Different Paper Sensors for Composite Materials

복합재료용 흑연/종이 센서의 최적제조조건 및 감지능 평가 연구

  • Park, Ha-Seung (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Shin, Pyeong-Su (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Kim, Jong-Hyun (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Baek, Yeong-Min (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Park, Joung-Man (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University)
  • Received : 2018.01.22
  • Accepted : 2018.04.28
  • Published : 2018.04.30
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Abstract

A new study was carried out to utilize a pencil drawing paper sensor (PDPS), which drew a line using a pencil on the paper, as a sensor. The sensing effect on 3 different papers based on the properties of PDPS was compared. The specimens were prepared by drawing 4B pencils on plain (A4), Hwasun, and Han papers. The silver paste was used to give good electrical contacts of the copper wires and the pencil drawn line. The chemical structures of 3 papers for PDPS by FT-IR spectrum analysis were similar and the comparative compact states of each paper were observed by optical microscope. From statistical evaluation of tensile strength using 3 papers, plain paper was chosen to be best for the PDPD. The optimum drawing number of PDPD was determined by changing the thickness of the paper with the drawing number. Electrical resistance (ER) with graphite on 3 different papers were compared. The changes in compression was observed through cyclic compressive test of composite materials, it was possible to predict the degree of strain sensing under compressive test. It leads to expectation of properties.

종이에 연필을 이용하여 선을 그리는 연필 선 종이 센서(pencil drawing paper sensor, PDPS)를 센서로 활용하기 위한 연구를 수행하였다. PDPS의 특성에 기반을 두는 3가지 다른 종이에 대한 감지 효과를 비교하였다. 시편은 4B 연필을 평지(A4), 화선지, 한지에 선을 그어 제작하였으며 구리선과 연필 선간의 전기 접점을 향상시키기 위해 실버 페이스트를 사용하였다. FT-IR 스펙트럼 분석으로 PDPS에 대한 3 종이의 화학적 구조가 유사하고 광학현미경으로 각 종이의 조밀도를 비교하였다. 3 종이의 인장 강도의 통계적 평가로부터, A4가 PDPS에 가장 적합하다는 것을 확인하였다. 선을 그린 횟수에 따른 종이의 두께 변화를 통해 그리는 횟수의 최적 조건을 확인하였으며 복합재료의 반복 압축 실험을 통해 압축력의 변화를 PDPS로 관측하였다. PDPS를 이용하여 복합재료의 기계적 물성을 비교적 예측할 수 있었다.

Keywords

References

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