Surface Modification of Cement-Reinforcing Carbon Fibers by Low Temperature Plasma Process

저온 플라즈마 공정을 이용한 시멘트 보강용 탄소 섬유의 표면개질

  • Cho, Dong Lyun (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Kim, Hoon (Faculty of Applied Chemical Engineering, Chonnam National University)
  • 조동련 (전남대학교 응용화학공학부) ;
  • 김훈 (전남대학교 응용화학공학부)
  • Received : 2004.11.22
  • Accepted : 2005.03.31
  • Published : 2005.06.10

Abstract

Cement-reinforcing carbon fibers were surface-modified with $O_2$, $H_2O$, acrylic acid, diaminocyclohexane plasmas and their effects were investigated. Hydrophobic surfaces with water contact angles of $75{\sim}80^{\circ}$ were changed to hydrophilic surfaces. The water contact angles were reduced down to lower than $10^{\circ}$. As a result, the fiber's hygroscopic property and dispersion in water were improved. Also, Zeta potential of the fiber in water was changed from a negative value to positive values. As a result, adhesion with cement that had a negative Zeta potential was improved up to 57~124% through increased electrostatic interaction.

Acknowledgement

Supported by : 한국학술진흥재단

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