Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Water Repellent Coating of Carbon Cloth with Different Size PTFE and Gas Permeabilities

PTFE 크기 변화에 따른 Carbon Cloth 발수 코팅과 가스 투과도 변화

  • Jeon, Hyeon (Applied chemistry engineering, School of engineering, Dankook University) ;
  • Cho, Tae-Hwan (Applied chemistry engineering, School of engineering, Dankook University) ;
  • Choi, Weon-Kyung (School of Engineering, Dankook Univ.)
  • 전현 (단국대학교 응용화학공학과) ;
  • 조태환 (단국대학교 응용화학공학과) ;
  • 최원경 (단국대학교 공학대학)
  • Received : 2010.07.28
  • Accepted : 2010.08.20
  • Published : 2010.08.31
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Abstract

Carbon cloth was impregnated into PTFE emulsion. PTFE is a fluoropolymer used as a coating material in various fields due to its hydrophobicity and excellent mechanical properties. In this study, PTFE emulsion was prepared different particle size of 5~500 nm and $3{\sim}5{\mu}m$. FE-SEM and FT-IR spectroscopy were used microscopic observation and investigation of chemical structure change after PTFE coating. Mass variations, gas permeability and water contact angles were analyzed to determine a GDL performance of PTFE coated carbon cloth. PTFE coated carbon cloth show different mass increase according as PTFE concentration and the number of coating times. Water contact angle of PTFE coated carbon cloth was not effected by size of PTFE particle and the number of coating time; meanwhile, gas permeability was rapidly changed at carbon cloth coated by emulsion with size of $3{\sim}5{\mu}m$ PTFE particle.

Keywords

References

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