爆轰法合成碳包覆纳米铜颗粒  

Synthesis of carbon-encapsulated copper nanoparticles by detonation method

作　　者：李晓杰[1] 张晓军[1] 罗宁[1] 王小红[1] 

机构地区：[1]大连理工大学工业装备结构分析重点实验室,辽宁大连116023

出　　处：《爆炸与冲击》2012年第2期174-178,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10872044;10972051;10902023);高等学校博士学科点专项科研基金项目(20090041110024)~~

摘　　要：以硝酸铜和柠檬酸制成的干凝胶为主要反应物,加入油酸有机碳源和黑索今炸药,在氮气保护气氛下在爆炸容器中引爆,成功地合成了碳包覆纳米铜颗粒。分别采用X射线衍射、透射电镜对产物形貌特征进行表征。结果表明,在爆轰产物中富含碳包覆纳米铜颗粒,产物呈圆球体,具有完好的核壳结构形貌,颗粒粒径在10～40 nm之间,外层碳壳结构主要由无定型碳和石墨构成。并对爆轰法合成碳包覆纳米铜颗粒的形成机理进行了分析。Cu3（C6H5O3）2 was mixed with oleic acid and RDX according to a certain proportion to prepare the reactant.The obtained mixed explosives were ignited by the detonators under nitrogen protection in an explosion vessel to synthesize carbon-encapsulated copper nanoparticles.The detonation products were black powders.The shape,composition and structure of the detonation products were characterized by using a transmission electron microscope（TEM） and X-ray diffraction（XRD） analysis.The XRD patterns show that the carbon-encapsulated copper nanoparticles are of cubic crystal structure and the average particle size is 20.2 nm in diameter.The TEM photographs display that the carbon-encapsulated copper nanoparticles are of spherical shape about 10~40 nm in diameter with 3~5 nm thick graphitic carbon or amorphous carbon shells.The results indicate that the detonation soot consists of copper as cores,and graphite and amorphous carbon as carbon-coating layers.Meanwhile,the formation mechanism of the carbon-encapsulated copper was tentatively discussed.

关 键 词：爆炸力学 核壳结构 爆轰合成法 碳包覆纳米铜颗粒 

分 类 号：O389[理学—流体力学]