화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.24, No.1, 97-104, January, 2000
Export Citation
활성화 온도에 의한 PAN계 활성탄소섬유/페놀수지 복합재료의 표면 및 흡착특성
Influence of Activation Temperature on Surface and Adsorption Properties of PAN-based Activated Carbon Fibers/Phenolic Resin Matrix Composites
박수진†, 김기동, 이재락
  • 한국화학연구소 화학소재연구부
Soo-Jin Park†, Ki-Dong Kim, and Jae-Rock Lee
  • Advanced Materials Divsion, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusong, Taejon 305-600, Korea
E-mail:
초록
산화처리 된 평직형태의 탄소섬와 resole형태의 페놀수지를 7:3 중량비로 혼합하여 성형공정에 EK라 탄소섬유/페놀수지 복합재료를 제조하였으며, 이를 다시 불활성 분위기에서의 탄화(1000°C) 및 CO2 분위기에서 활성화(700, 800, 900 및 1000°C)시켜 PAN계 활성탄소섬유/페놀수지ㅣ 복합재료를 제조하였다. 본 연구에서는 이렇게 제조된 복합재료에 활성화 온도가 미치는 여향을 중화 적정법에 따른 pH, 표면산도 및 표면 염기도 등의 표면성질과 BET 방법에 EK른 비손실을 측정하였다. 결과적으로, 활성화 온도는ㄴ 그 표면 성질의 변화에 영향을 주어, 900°C 이상의 온도에서 시료으이 표면은 점차 염기성이 커지는 것을 확인할 수 있었다. 또한, 비표면적, 총기공 부피 및 기공 크기 분포도 등의 발달은 활성화 온도으이 증가에 따라 점차 증가함을 쉽게 확인할 수 있으며, 그 중 활성화 온도가 900°C인 경우 가장 발달한 것으로 나타났다. 마찬가지로, 활성화 온도의 증가에 따라 시편 양 단면에 걸리는 압력손실은 점차 감소하였으며, 이것은 열처리 온도에 의한 활성탄소섬유 복합재료의 질량손신에 의한 것으로 사료된다.
PAN-based activated carbon fibers/phenolic resin matrix composites(ACFCs) were manufactured via molding process with oxidized carbon fabrics(plain-type) and phenolic resin(resole-type) compounded by 70 : 30wt%. The green body (as molded) was submitted to carbonization(at 1000 ℃) in an inert enviroment and activation (at 700, 800, 900 and 1000 ℃) in a CO2 enviroment. In this work, the influence of activation temperatures was investigated in surface properties, such as pH, acid-and base-values by titration method, and inadsorption properties, i.e., specific surface area and pore structures by BET-method of the composites. Also, the pressure drops of the specimens were calibrated by ASTM. As a results, the activation temperature influenced the surface property of ACFSc. When the activation temperature was higher than 900℃, the surface was gradually developed in basic nature. And, the evolutions of specific surface area, total pore volume and pore size distribution of ACFCs could be easily confirmed the dependence on the activation temperature. Among them, well-developed pore structure from adsorption characteristics was charged of the ACFCs activated at 900℃. Also, the pressure drop was slightly decreased with increasing the temperature due to increasing the burn-off with heat treatment temperature of ACFCs.
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