摘要
石墨的层状结构使外来物质可进入层间,形成插入层;插入层在爆轰条件下分解后可将石墨层片推开,形成纳米石墨薄片。通过建立石墨层间化合物有限元模型,利用γ拟合法获取层间化合物的相关参数,基于Thomas-Fermi方程推导出相邻石墨层片分离时的层间作用力与层间距的函数关系;通过LS-DYNA模拟了石墨层片的分离过程,并给出石墨层间距随时间的变化关系,从而阐明薄片状无粘连纳米石墨的形成过程。
According to the property that foreign materials can insert into graphite layers, nanometer graphite sheets with perfect performance can be prepared by detonation technique. This research, through establishing a finite element model of graphite intercalation compounds, obtained detonation parameters by fitting method, and revealed the functional relation between force and distance of the ad- jacent graphite interlayer with Thomas-Fermi equation. At last, the splitting process of adjacent graphite layer was simulated by LS-DYNA. Furthermore, the process of preparing graphite nanosheets by detonation technique was also described.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2012年第6期632-638,共7页
Chinese Journal of High Pressure Physics
基金
中国劳动关系学院"中央高校基本科研业务费专项资金"资助项目(12zy001)
关键词
纳米石墨片
制备机理
LS—DYNA
石墨层间作用力
graphite nanosheets
preparation mechanism
LS-DYNA
binding force between graphite layers
