3-氨丙基三乙氧基硅烷对多壁碳纳米管的化学修饰研究  

Study on Chemical Modification of Multi-walled Carbon Nanotubes with 3-aminopropyltriethoxysilane Coupling Agent

作　　者：鲍宜娟[1] 刘宝春[1] 顾辉平[1] 

机构地区：[1]南京工业大学理学院,南京210009

出　　处：《材料导报（纳米与新材料专辑）》2011年第1期93-96,共4页

摘　　要：先用混酸体系(浓硫酸/浓硝酸体积比为3:1)对多壁碳纳米管进行了氧化处理,再利用氧化处理后多壁碳纳米管表面生成的羟基与3-氨丙基三乙氧基硅烷偶联剂(KH550)进行反应,制备了表面有机修饰的多壁碳纳米管。对比了未经改性的原始多壁碳纳米管、混酸处理过的多壁碳纳米管以及经过表面有机修饰的多壁碳纳米管在水中的分散性能。采用红外光谱、透射电镜、拉曼光谱等对化学修饰前后的各种多壁碳纳米管进行了表征和分析。结果表明,硅烷偶联剂KH550已成功地接到多壁碳纳米管上。硅烷化后的多壁碳纳米管保持碳纳米管的结构不变,在水中基本呈现分散状态并可稳定放置20天以上。The multi-walled carbon nanotubes （MWCNTs）samples were oxidized by the acid mixture（sulfuric acid/nitric acid, 3 ： 1）. Hydroxyl groups could be brought into the MWCNTs. Then the functionalized MWCNTs were silanized using a silane coupling agent, 3-aminopropyltriethoxysilane. The dispersion states of unmodified and modified MWCNTs in water were studied. The MWCNTs and modified MWCNTs in differnert ＂steps were characte- rized by fourier transform infrared spectroscopy, transmission electron microscopy, and raman spectroscopy. The re- sult shows that the silane couping agent is successfully grafted onto the oxidized MWCNTs. The layered structure of the MWCNTs remains largely intact, which indicates that there is no real damage to the MWCNTsduring the silaniza- tion process. The agglomeration of Si-MWCNTs is significantly reduced compared to that of raw＇MWCNTs and the Si-MWCNTs exhibits good suspension stability for more than 20 days.

关 键 词：多壁碳纳米管 化学修饰 3-氨丙基三乙氧基硅烷 

分 类 号：O613.71[理学—无机化学]