公开(公告)号：KR1020080021334A

公开(公告)日：2008-03-07

申请号：KR1020060084637

申请日：2006-09-04

Applicant: 세종대학교산학협력단

Inventor： 이내성 ,  곽정춘 ,  탄순홧

IPC: B82B3/00 ,  C01B31/02 ,  B82Y40/00

CPC classification number: C01B32/17 ,  B82B3/0004 ,  B82Y40/00 ,  C01B2202/30

Abstract: A method for purifying carbon nanotubes using beads is provided to enhance a purification effect of carbon nanotubes by increasing an air contact area of a carbon nanotube composition and heating the carbon nanotube composition uniformly. A method for purifying carbon nanotubes using beads includes the steps of: (S10) mixing an impurity-containing carbon nanotube composition with metallic or ceramic beads, and then (S20) oxidizing the carbon nanotube composition in a reactor by a vapor method to remove amorphous carbon; (S30) removing a metal catalyst exposed in the oxidized carbon nanotube composition using a nitric acid solution; and (S40) heat-treating the metal catalyst-free carbon nanotube composition to remove the residual carbon impurities. Further, the step of oxidizing the carbon nanotube composition is performed at 300-500‹C for 30-180 minutes.

Abstract translation: 提供使用珠子净化碳纳米管的方法，通过增加碳纳米管组合物的空气接触面积并均匀加热碳纳米管组合物来增强碳纳米管的净化效果。 使用珠粒净化碳纳米管的方法包括以下步骤：（S10）将含杂质的碳纳米管组合物与金属或陶瓷珠混合，然后（S20）通过蒸气法在反应器中氧化碳纳米管组合物以除去无定形 碳; （S30）使用硝酸溶液除去在氧化碳纳米管组合物中暴露的金属催化剂; 和（S40）对不含金属催化剂的碳纳米管组合物进行热处理以除去残留的碳杂质。 此外，氧化碳纳米管组合物的步骤在300-500℃下进行30-180分钟。

公开(公告)号：KR100827387B1

公开(公告)日：2008-05-06

申请号：KR1020060084637

申请日：2006-09-04

Applicant: 세종대학교산학협력단

Inventor： 이내성 ,  곽정춘 ,  탄순홧

IPC: B82B3/00 ,  C01B31/02 ,  B82Y40/00

Abstract: 본 발명은 탄소나노튜브 정제방법에 관한 것으로, 특히 불순물을 포함하는 탄소나노튜브 조성물에 소정 크기의 세라믹 볼을 혼합시키고, 기상법으로 상기 탄소나노튜브 조성물을 산화 처리하여 정제함으로써, 상기 탄소나노튜브 조성물의 공기 접촉 면적이 증가되고, 균일하게 가열되어 탄소나노튜브 정제 효과를 증대시킬 수 있는 볼을 이용한 탄소나노튜브의 정제방법에 관한 것이다.
본 발명인 볼을 이용한 탄소나노튜브의 정제방법을 이루는 구성수단은, 탄소나노튜브 정제방법에 있어서, 불순물이 포함된 탄소나노튜브 조성물에 다양한 크기와 종류를 가지는 금속 또는 세라믹 볼을 혼합한 후, 반응기에서 상기 탄소나노튜브 조성물을 기상법으로 산화처리하여 비정질 탄소를 제거하는 단계, 상기 산화된 탄소나노튜브 조성물에 노출된 금속 촉매를 질산 용액으로 제거하는 단계, 상기 금속 촉매가 제거된 탄소나노튜브 조성물을 열처리하여 잔존하는 탄소불순물을 제거하는 단계를 포함하여 이루어진 것을 특징으로 한다.
탄소나노튜브, 정제, 볼

公开(公告)号：KR100790839B1

公开(公告)日：2008-01-02

申请号：KR1020060072013

申请日：2006-07-31

Applicant: 세종대학교산학협력단

Inventor： 이내성 ,  곽정춘 ,  탄순홧

IPC: B82B3/00 ,  C01B31/02 ,  B82Y40/00

CPC classification number: C01B32/17 ,  B82B3/0095 ,  B82Y40/00

Abstract: A nondestructive refining method for carbon nanotube is provided to obtain easily highly pure carbon nanotube with high yield. The nondestructive refining method for carbon nanotube comprises: an acid treatment step that a carbon nanotube composition containing impurities is treated with aqueous acid solution; a filtration step that the carbon nanotube composition treated with acid is reacted with cationic dispersant, and the impurities are extracted with organic solvent; a separation step that the remained carbon nanotube after filtration is re-dispersed and the non-multiple carbon nanotube is separated; and a heat treatment step that the impurities are extracted and organic matters in the remained nanotube is removed. The carbon nanotube composition containing impurities is oxidized by refluxing with aqueous acid solution boiled at 100-100deg.C for 1-15 hours. The acid-treated carbon nanotube composition and cationic dispersant is reacted at 90-150deg.C for 12-96 hours. The filtration step comprises steps of: installing a filtration instrument having a filter inside thereof in a soxlet extraction equipment; feeding the carbon nanotube composition which is reacted with cationic dispersant in the filtration instrument; and repeatedly washing the carbon nanotube composition using organic solvent. The separation step comprises steps of: dispersing the remained carbon nanotube composition by extraction of impurities using ultrasonic wave; separating the supernatant after centrifugation; and filtering the supernatant on filter. In the heat treatment step, 80sccm-120sccm of air is flowed in the furnace that is maintained at 300-400deg.C for 10 minutes to 1 hour.

Abstract translation: 提供了用于碳纳米管的非破坏性精制方法，以高产率获得容易高纯度的碳纳米管。 碳纳米管的非破坏性精制方法包括：用酸性水溶液处理含有杂质的碳纳米管组合物的酸处理工序; 将用酸处理的碳纳米管组合物与阳离子分散剂反应的过滤步骤，并用有机溶剂萃取杂质; 过滤后剩余的碳纳米管再分散并分离非多重碳纳米管的分离步骤; 以及去除杂质的热处理工序，除去剩余的纳米管中的有机物。 含有杂质的碳纳米管组合物通过与100-100℃煮沸的酸水溶液回流1-15小时而被氧化。 酸处理的碳纳米管组合物和阳离子分散剂在90-150℃下反应12-96小时。 过滤步骤包括以下步骤：将一个其中具有过滤器的过滤器械安装在套管提取设备中; 将与阳离子分散剂反应的碳纳米管组合物进料到过滤仪器中; 并使用有机溶剂反复洗涤碳纳米管组合物。 分离步骤包括以下步骤：通过使用超声波提取杂质来分散剩余的碳纳米管组合物; 离心后分离上清液; 并过滤上清液。 在热处理步骤中，将80sccm-120sccm的空气在保持在300-400℃的炉中流动10分钟至1小时。