论文部分内容阅读
采用混酸体系(浓硫酸与浓硝酸体积比为3∶1)对碳纳米管进行氧化处理,再采用十二烷基三甲氧基硅烷(KH-304)对氧化碳纳米管进行表面改性,制得表面改性的碳纳米管。改性后的碳纳米管在乙醇和二氯甲烷的有机溶剂中的分散性得到了提高,吸油量从300mL/100g降到210mL/100g,水接触角从57.5°提高到了102.5°。运用傅里叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)及热失重分析(TG)对改性前后的碳纳米管进行了结构表征,结果表明:长链硅烷偶联剂成功接枝到氧化碳纳米管的表面,接枝量约25%。
Carbon nanotubes were oxidized by a mixed acid system (3: 1 by volume ratio of concentrated sulfuric acid to concentrated nitric acid), and then surface modified with carbon nanotubes by dodecyltrimethoxysilane (KH-304) Surface-modified carbon nanotubes were obtained. The modified carbon nanotubes have better dispersibility in organic solvent of ethanol and dichloromethane, the oil absorption decreased from 300mL / 100g to 210mL / 100g, and the water contact angle increased from 57.5 ° to 102.5 °. The carbon nanotubes before and after modification were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TG). The results showed that the long-chain silane coupling agent Successfully grafted to the surface of carbon nanotubes, grafting amount of about 25%.