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질산증기 또는 공기로 산화된 등방성 핏치섬유의 탄화

Carbonization of Isotropic Pitch Fiber Oxidized with Nitric Acid Vapor or Hot Air

이진기 인세진 이보성 유승곤

Lee JK In SJ Rhee BS Ryu SK

HWAHAK KONGHAK, August 1991, 29(4), 433-439(7), NONE

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Abstract

등방성 핏치 섬위가 질산증기 혹은 뜨거운 공기로 각각 산화되었다. 핏치섬유의 최적 삼화 및 탄화조건들을 얻기 위하여 이 산화섬유를 탄화하는 동안 가열속도를 달리하면서 탄화의 특성과 결과적으로 생성된 탄소섬유의 기계적 물성을 조사하였다. 두 가지 다른 방법으로 산화된 섬유들은 각각 다른 기능기들을 함유하고 있어서 탄화하는 동안 아주 다른 중량감소곡선을 보여 주었다. 질산증기로 산화한 핏치섬유의 산화온도와 산화시간은 공기 산화에 비하여 훨씬 낮아지구 단축되지만 최적 탄화조건을 유지하면 탄소섬유의 기계적 물성에는 변함이 없었다.

Isotropic pitch fiber was oxidized with nitric acid vapor and hot air respectively. Carbonization characteristics and mechanical properties of these fibers were investigated by changing the heating rate of carbonization to get the optimum oxidation and carbonization conditions of pitch fibers. Two types of oxidized fibers show quite different weight loss curves during carbonization because of different functiional groups. Nitric acid vapor could reduce and shorten the oxidation temperature and time of pitch fibers com-paring to hot air without lessening the mechanical properties of carbon fibers.

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References

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