Preparation of Activated Carbon Fiber-Ceramic Composites and Its Physical Properties

활성탄소섬유-세라믹복합체의 제조 및 물성

  • 이재춘 (명지대학교 무기재료공학과) ;
  • 박민진 (명지대학교 무기재료공학과) ;
  • 김병균 (명지대학교 무기재료공학과) ;
  • 신경숙 (명지대학교 무기재료공학과) ;
  • 이덕용 (명지대학교 무기재료공학과)
  • Published : 1997.01.01

Abstract

The PAN (Polyacrylonitrile) based carbon fiber-ceramic composites (CFCC) were prepared from mixtures of short carbon fibers, phenolic resin and ceramic binder. The effects of carbonization temperature of a pre-cursor fiber, the stabilized PAN fiber, on the specific surface area and the bending strength of the activated CFCC were studied in this work. The precursor fiber was carbonized at 80$0^{\circ}C$ and 100$0^{\circ}C$, respectively. The CFCC were activated at 85$0^{\circ}C$ in carbon dioxide for 10~90 minutes. As the burn-off of the activated CFCC made of the precursor fiber carbonized at 80$0^{\circ}C$ was increased from 37% to 76%, the specific surface area in-creased from 493m2/g to 1090m2/g, and the bending strength decreased from 4.5MPa to 1.4MPa. These values were about two times larger than those of the activated CFCC of which precursor fiber was car-bonized at 100$0^{\circ}C$. The effects of carbonization temperature of a precursor fiber on the specific surface area and bending strength of the activated CCFC were explained by bonding force between carbon fiber and car-bonized phenolic resin as well as by relative shirnkage between carbon fiber and ceramic film.

탄화된 PAN 섬유, 페놀수지, 세라믹 결합체를 혼합하여 탄소섬유-세라믹복합체를 제조한 후 활성화시켜 PAN 섬유의 탄화온도에 따른 활성탄소섬유-세라믹복합체의 비표명적과 굽힘 강도변화를 연구하였다. 안정화 PAN 섬유를 80$0^{\circ}C$와 100$0^{\circ}C$에서 각각 탄화시켜 얻은 두 종류의 탄소섬유를 복합체 제작시편의 원료로 사용하였다. 탄소섬유-세라믹복합체를 10~90분간 CO2로 85$0^{\circ}C$에서 활성화시켜 얻은 두 종류의 활성복합체에 대한 물성 측정결과, 80$0^{\circ}C$로 PAN 섬유를 탄화시켜 만든 활성복합체의 burn-off이 37%에서 76%로 증가될 때 비표면적은 493m2/g에서 1090m2/g으로 증가하였으며, 굽힘강도는 4.5 MPa에서 1.4MPa로 감소하였다. 이 값들은 안정화 PAN 섬유의 탄화온도를 100$0^{\circ}C$로하여 활성복합체 시편이 나타내는 값보다 약 2배 정도 큰 값이었다. 비표면적, 굽힘강도 측정결과와 미세조직 관찰결과, PAN 섬유의 탄화온도가 활성복합체의 비표면적과 굽힘강도에 미치는 영향은 활성화시 탄소섬유와 페놀수지탄화체 또는 세라믹 필름간에 발생되는 결합력과 상대적인 수축율에 의해 결정되는 활성복합체의 구조특성에 기인된 것으로 해석하였다.

Keywords

References

  1. Carbon v.32 no.4 Activated Carbon Fiber: Fundamentals and Applications M. Suzuki
  2. Carbon v.34 Modelling the Gasification of Carbon Fibres A. B. Fuertes;G. Marban;J. Munniz
  3. Mat. Res. Soc. Symp. Proc. v.344 A New Preparation of Activated Carbon Fiber R. Fu;Y. Lu;H. Lu;H. Zeng
  4. Mat. Res. Soc. Symp. Proc. v.344 The Catalytic Reduction of Nitrozen Oxide Over the Catalysts Supported on Activate Carbon Fibers Y. Lu;R. Fu;Y. Chen;H. Zeng
  5. Fuel v.63 Catalytic Activity of PAN-Based Active Carbon Fibre Activated with Sulphuric Acid for Reduction of Nitric Oxide with Ammonia Y. Komatsubara;S. Ida;H. Fujitsu;I. Mochida
  6. Mat. Res. Soc. Symp. Proc. v.344 Carbon Fiber Composite Molecular Sieves for Gas Separation M. Jagtoyen;F. Derbyshire;N. Brubaker;Y. Fei;G. Kimber;M. Matheny;T. Burhell
  7. J. Am. Ceram. Soc. v.77 no.6 Preparation of Silicon Carbide Fiber from Activated Carbon Fiber and Gaseous Silicon Monoxide K. Okada;H. Kato;K. Nakajima
  8. Carbon v.33 no.4 Oxidation Protection of Carbon Fibers by Coatings Y. Q. Wang;B. L. Zhou;Z. M. Wang
  9. Carbon v.33 no.4 MOCVD of Alumina-Silica Oxidation Resistent Coatings on Carbon Fibers C. C. Landry;A. R. Barron
  10. Carbon v.30 no.4 The Effects of Activation by Carbon Dioxide on the Mechanical Properties and Structure of Pan-Based Activated Carbon Fibers T. H. Ko;P Chiranairadul;C. K. Lu;C. H. Lin
  11. Am. Ceram. Soc. Bull. v.64 no.5 Carbon-bonded Carbon Fiber Insulation for Radioisotope Space Power Systems G. C. Wei;J. M. Robbins
  12. Fuel v.64 Surface Area and Pore Development During Lignite Activation L. P. Rist;D. P. Harrison
  13. Carbon v.7 The Formation of Glasslike Carbon by Pyrolysis of Polyfurfuryl Alcohol and Phenolic Resin E. Fitzer;W. Schaefer;S. Yamada
  14. Br. Ceram. Trans. J. v.84 Carbon Binders from Polymeric Resins and Pitch:Part Ⅰ-Pyrolysis Behaviour and Structure of the Carbons B. Rand;B. McEnaney
  15. Kolon Technical Report Phenolic Resin for Refractory Binders
  16. Tanseo v.134 Interaction between Carbon Fiber Surface and Phenol Resin or Mesophase Coal Tar Pitch M. Anzai;S. Haggiwara;A. Ohkura;H. Honda;Y. Yamada