通过催化化学气相沉积法合成了多壁碳纳米管(MWCNTs).在相转移催化剂甲基三辛基氯化铵存在下,以高锰酸钾(KMnO4)为氧化剂在室温下对MWCNTs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MWCNTs进行表征.借助超声波降解法将功能化MWCNTs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MWCNTs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.
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