페놀수지 및 에틸렌 글리콜을 첨가한 유리질 카본 코팅층의 물성 제어
Morphology control of glassy carbon coating layer to additive ethylene glycol and phenolic resin
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초록
본 연구에서는 페놀수지를 사용하여 흑연표면에 유리질 카본 코팅을 진행하였다. 코팅액은 균일한 표면을 가지는 유리질 카본 코팅층 형성을 위해 페놀수지와 경화제, 희석제, 첨가제 등을 혼합하였다. 코팅된 페놀수지는 25~60°C에서 건조 100~200°C에서 경화 500~1,500°C에서 열처리하여 유리질 카본으로 전환하였다. 유리질 카본의 특성 분석을 위해FTIR, XRD, SEM 분석, 밀도/기공율/접촉각 측정을 진행하였다. 유리질 카본 형성에 있어 최적 온도는 약 1,000°C로 확인되었다. 그리고 첨가제의 함량이 높아질수록 코팅 표면의 결함감소, 기공율 감소, 접촉각 증가, 밀도 증가 등의 효과를 보였다. 첨가제를 통한 유리질 카본 코팅층 형성 방법은 흑연 코팅 및 다른 분야에 적용이 가능할 것으로 기대된다.
Abstract
In this study, glassy carbon coating was performed on the graphite using a phenolic resin and a curing agent was mixed with ethylene glycol as an additive to form the uniform surface. The phenolic resin was dried and cured under the environments of hot air, then converted into a glassy carbon layer by pyrolysis at 500~1,500°C. FTIR, XRD, SEM analysis, and density/porosity/contact angle measurement were performed for characterization of glassy carbon. The pyrolysis temperature for high-quality glassy carbon was optimized to be about 1,000°C. As the content of the additiveincreased, the effect of reducing surface defects on the coated surface, reduction of porosity, increase of contact angle, andincrease of density were investigated in this study. The method of forming a glassy carbon coating layer through an additive is expected to be applicable to graphite coating and other fields.
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