功能化多壁碳纳米管海绵状微球制备(英文)

Preparation of spongy microspheres consisting of functionalized multiwalled carbon nanotubes

通过催化化学气相沉积法合成了多壁碳纳米管(MW CNTs)。在相转移催化剂甲基三辛基氯化铵存在下,以高锰酸钾(KM nO4)为氧化剂在室温下对MW CNTs进行功能化处理。采用傅立叶变化红外光谱、热失重分析分析法对功能化MW CNTs进行表征。借助超声波降解法将功能化MW CNTs分散在二氯甲烷中形成悬浮液,然后将其悬浮液逐滴加至搅拌的聚乙烯醇溶液中形成海绵状微球。扫描电子显微镜(SEM)显示:形成的海绵状微球由松散缠结的MW CNTs构成,直径为50μm～150μm。该微球可望应用于轻型吸能涂料,催化剂以及电子学领域。

Multiwalled carbon nanotubes（MWCNTs） were synthesized by catalytic chemical vapor deposition and functionalized by oxidation with potassium permanganate at room temperature using a phase transfer catalyst,methyl trioctyl ammonium chloride as a dispersion agent.The functionalized nanotubes were characterized by Fourier transform infrared spectroscopy and thermogravimetry.Sonication was used to assist their dispersion in dichloromethane and the resulting suspension was added dropwise to a stirred polyvinyl alcohol aqueous solution and spongy microspheres were formed.SEM showed that the microspheres consisted of loosely entangled MWCNTs that had diameters in the range 50-150 μm.The microspheres may be useful for lightweight energy absorbing coatings,catalyst and electronics applications.