CARBON NANOTUBES HAVING IMPROVED THERMAL STABILITY

According to the present invention, carbon nanotubes are purified by a method comprising a step for allowing a metal remaining in the carbon nanotubes to react with a chloride-containing compound at a first temperature in the vacuous or inactive ambience to chlorinate the remaining metal, and vapori...

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Bibliographic Details
Main Authors JANG, Hyungsik, KANG, Kyung Yeon, WOO, Jihee, CHO, Dong Hyun, LEE, Seungyong
Format Patent
LanguageEnglish
French
Korean
Published 02.02.2017
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Summary:According to the present invention, carbon nanotubes are purified by a method comprising a step for allowing a metal remaining in the carbon nanotubes to react with a chloride-containing compound at a first temperature in the vacuous or inactive ambience to chlorinate the remaining metal, and vaporizing and removing the chlorinated remaining metal at a second temperature higher than the first temperature, so that carbon nanotubes are provided that have an oxidation initiation temperature increased by 100°C compared with carbon nanotubes before purification, and thus the carbon nanotubes can be more effectively used for flame-retardant materials, metal complexes, and the like, used in high-temperature environments. Selon la présente invention, des nanotubes de carbone sont purifiés par un procédé comprenant une étape consistant à permettre la réaction d'un métal restant dans les nanotubes de carbone avec un composé contenant du chlorure à une première température, sous vide ou une atmosphère inactive, pour chlorer le métal restant et à vaporiser et à éliminer le métal restant chloré à une deuxième température, plus élevée que la première température, de sorte que des nanotubes de carbone, qui présentent une température d'initiation d'oxydation augmentée de 100°C par rapport à des nanotubes de carbone avant purification, sont obtenus et, par conséquent, les nanotubes de carbone peuvent être utilisés plus efficacement pour des matériaux retardateurs de flamme, des complexes métalliques et analogues, utilisés dans des environnements à haute température. 본 발명은 카본나노튜브에 잔류하는 금속을 진공 또는 불활성 분위기에서 제1온도로 염소 함유 화합물과 반응시켜 상기 잔류 금속을 염소화 하고, 상기 제1온도 보다 높은 온도의 제2온도에서 상기 염소화된 잔류 금속을 증발 및 제거하는 단계;를 포함하는 방법으로 카본나노튜브를 정제함으로써, 정제 전 카본나노튜브에 대비하여 산화개시온도가 100℃ 이상 상승되는 카본나노튜브를 제공함으로써, 고온의 환경에서 사용되는 난연재, 금속복합재 등에 보다 효과적으로 사용할 수 있다.
Bibliography:Application Number: WO2016KR06765