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습식방법에 의한 팽창흑연의 제조 및 특성에 관한 연구

Preparation and Characterization of Expanded Graphites by Wet Process

한국화학연구원 화학소재연구부, 305-600 대전시 유성구 장동 100 1충남대학교 고분자공학과, 305-764 대전시 유성구 궁동 200
Advanced Materials Division, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yuseong-gu, Daejeon 305-600, Korea 1Polymer Science and Engineering, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea
psjin@krict.re.kr
HWAHAK KONGHAK, December 2003, 41(6), 802-807(6), NONE
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Abstract

본 연구에서는 습식방법에 의한 팽창흑연(EG)의 특성을 조사하였고, 오일 흡착실험을 통하여 EG의 유류 흡착제로서의 적용에 대한 가능성을 조사하였다. 실험에 사용된 층간흑연(GICs)은 습식방법에 의하여 천연흑연의 층간에 삽입제를 삽입시켜 준비하였고, EG는 GICs를 600 - 900 ℃ 사이의 고온과 산소기류 하에서 1분간 열처리하여 제조하였다. 다양한 처리 온도에 대한 EG의 팽창 부피, 삽입제의 함량 그리고 층간거리는 메스실린더와 XRD를 사용하여 측정하였고, 오일 흡착실험을 위하여 n-dodecane을 사용하였다. 또한, 오일흡착 전과 후의 표면 형태는 SEM을 이용하여 관찰하였다. 실험 결과, 처리 온도의 증가와 함께 EG의 팽창 부피와 삽입제의 함량은 증가하였고, 오일 흡착용량은 EG(1g)에 대해 16-35 g의 오일을 흡착하는 것을 관찰할 수 있었다. 이러한 실험결과, EG의 제조를 위한 습식방법은 오일의 새로운 흡착제로써 EG를 제조하는 유용한 방법으로 관찰된다.
In this work, the characteristics of expanded graphite (EG) are investigated for the possibility of useful application as oil-adsorbent of EG. The graphite intercalated compounds (GICs) are prepared by the wet process that leads to an intercalation of intercalant into natural graphites. The graphite intercalate is subjected to the heat treatment in furnace between 600 ℃ and 900 ℃ under oxidizing atmosphere for about 1 min. The expansion volume, volatile content, and interlayer distance of EG on different heating temperatures are measured by mass cylinder and X-ray diffraction (XRD). N-dodecane is used for oil adsorption, and morphology of EG before and after oil adsorption is observed by SEM. As a result, the expansion volume and volatile content of EG are increased with increasing the treatment temperature. The oil adsorption capacity is found to be 16-35 g of n-dodecane per the 1 g EG studied. It is then concluded that the wet process of EG is a useful technique for a new adsorbent of oil.

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