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


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.


Supported by : 한국학술진흥재단


  1. Mel Schwartz, Composite Materials Handbook, McGraw-Hill, New York (1992)
  2. A. Bentur and S. Mindess, Fibre Reinforced Cementitious Composites, Elsevier, London (1990)
  3. S. B. Park, B. J. Lee, and Y. S. Lim, Cem. and Concr. Res., 21, 589 (1991)
  4. M. Grzybowski and S. P. Shah, ACI Materials J., 87, 138 (1990)
  5. X. Fu, W. Lu, and D. D. L. Chung, Carbon, 36, 1337 (1998)
  6. X. Fu, W. Lu, and D. D. L. Chung, Cem. Concr. Res., 35, 1485 (1996)
  7. Y. Xu and D. D. L. Chung, Cem. Concr. Res., 29, 451 (1999)
  8. H.-C. Wu and V. C. Li, Cement & Concrete Composites, 21, 205 (1999)
  9. J. Y. Yuan, S. S. Shyu, and J. Y. Lai, J. Appl. Polym. Sci., 42, 2525 (1991)
  10. G. S. Shen and S. S. Shyu, J. Adhesion Sci. Technol., 8, 531 (1994)
  11. C. J. Pouchert, The Aldrich Library of FT-IR Spectra, Edition 1, Aldrich Chemical Company, Milwaukee, WI (1985)
  12. D. J. Cho, P. M. Claesson, C.-G. Golander, and K. Johansson, J. Appl. Polym. Sci., 41, 1373 (1993)
  13. C.-G. Golander, M. W. Rutland, D. L. Cho, A. Johansson, H. Ringblom, S. Jonsson, and H. K. Yasuda, J. Appl. Polym. Sci., 49, 39 (1993)