Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Study on Physical Properties of Waterborne Polyurethane and Carbon Nanofiber Composites

수분산 폴리우레탄 및 탄소나노섬유 복합체의 물리적 특성

  • Lim, Suk-Dae (THE DEUM Co., Ltd.) ;
  • Ko, Sang-Choel (Department of Carbon Convergence Engineering, Jeonju University) ;
  • Kwac, Lee-Ku (Department of Carbon Convergence Engineering, Jeonju University)
  • Received : 2021.09.14
  • Accepted : 2021.10.12
  • Published : 2021.11.30
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Abstract

In this study, the electrical and mechanical properties of carbon polymer composites, which have been gradually increasing in use in various fields, were investigated, and environment-friendly carbon nanofiber/waterborne polyurethane composites were prepared. Carbon nanofibers (diameter = approximately 100-300 mm) were synthesized using a relatively simple CVD process, obtaining a carbon material for application in ultrathin planar heating films and EMP shielding films in the future. The carbon nanofiber was dispersed, and mixed with water-dispersible polyurethane using a dispersing aid. According to the carbon nanofiber mass ratio, 20%-60% polyurethane/carbon nanofiber composites were manufactured. At a concentration of approximately 20%, the percolation threshold was determined, and at a concentration of approximately 50%, an electrical conductivity greater than 0.1 S/cm was determined. Moreover, a sample having a concentration of up to 60% was evaluated to further understand the mechanical properties. It was observed that as the concentration of the carbon nanofibers increased, the elongation decreased.

Keywords

Acknowledgement

본 연구는 정부의 재원으로 2016년도 한국연구재단(No. 2016R1A6A1A03012069의 지원을 받아 수행된 결과임.

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