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聚丙烯腈基炭纳米球的制备

PREPARATION OF POLYACRYLONITRILE-BASED CARBON NANOSPHERES

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【Author】 Yang Guangzhi1,2 Yang Junhe2 Liu Yang1 Jia Runping3Xu Risheng1 Wang Xia3 and Ling Licheng1(1.UNILAB,State Key Laboratory of Chemical Engineering,East China University of Science and Technology,200237 Shanghai;2.College of Materials Science and Engineering,University of Shanghai for Science and Technology,200093 Shanghai;3.Department of Materials Science and Engineering,Shanghai Institute of Technology,200235 Shanghai)

【机构】华东理工大学化学工程联合反应国家重点实验室；上海理工大学材料学院；上海应用技术学院材料工程系；

【摘要】采用低浓度水相分散聚合的方法合成了粒径在230 nm~250 nm的聚丙烯腈球,对其依次经过冷冻干燥、氧化及炭化工艺,用扫描电镜对炭化后的样品形貌进行了观察.结果表明,聚丙烯腈球炭化后转化为粒径在170 nm~190 nm之间的炭纳米球.炭纳米球经1500℃,2300℃及2800℃的高温处理后,X射线衍射仪分析表明,在2300℃处理温度以上可以得到石墨化度明显增加的炭纳米球.更多还原

【Abstract】 Polyacrylonitrile(PAN) nanospheres latex with an average diameter size between 230 nm and 250 nm was synthesized by dispersion polymerization.After freeze drying,the PAN particles were stabilized in air at 250 ℃ and then carbonized in nitrogen at 1 000 ℃.Scanning electron microscopy study showed that all PAN nanospheres were carbonized to carbon nanospheres with the diameter range of 170 nm-190 nm.The carbon nanospheres were also treated at 1 500 ℃,2 300 ℃ and 2 800 ℃ respectively.X-ray diffraction study showed that above 2 300 ℃ the graphitization degree of the samples appeared a distinct increase.更多还原

【关键词】聚丙烯腈；炭纳米球；热处理；
【Key words】 polyacrylonitrile； carbon nanospheres； heat treatment；

【基金】国家自然科学基金资助项目(50473064,50730003,50672025,50773040);上海市重点学科资助项目(P1502);上海科委资助项目(065212048,06DZ22003,2006JC14018)

【文献出处】煤炭转化 ,Coal Conversion , 编辑部邮箱 ,2009年02期

【分类号】TB383.1
【被引频次】4
【下载频次】352

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