摘要
基体诱导法制备碳纳米管（CNT）／云母复合导电粉，即用聚乙烯醇（PVA）或聚丙烯酰胺（PAM）对云母进行处理，将处理后的云母与CNT分散液混合，使CNT吸附在云母表面．测试复合导电粉的体积电阻率（ρ）发现，CNT含量为1．0wt％时，CNT／云母的ρ为2．0×10^4Ω·cm，而用PVA修饰的云母制备CNT／云母，体积电阻率达到86．6Ω．cm．运用XPS、SEM对复合导电粉进行表征．结果表明当云母表面经PVA修饰后，能改善CNT在其表面的吸附和分散，使CNT／云母的体积电阻率明显降低．
Carbon nanotube （CNT）/Mica conductice composite powder was prepared by a substrateinduced method. The mica was modified by poly （vinyl alcohol） （PVA） or polyacrylamide （PAM）, and mixed with CNT suspension, then CNT adsorbed on mica surface. The resistivity （ρ） of composite powder was measured. XPS, SEM were used to characterize the obtained CNT/Mica. The results show that the resistivity is 2.0×10^4Ω·cm when the unmodified mica is used to prepare 1.0wt% CNT/Mica, while the resistivity can reach 86.6Ω·cm when modified mica is used. Modified mica can improve CNT adsorption and dispersion, and decrease the resistivity of CNT/Mica remarkably.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第6期1131-1134,共4页
Journal of Inorganic Materials
基金
国家重大科学研究计划(2006CB932703)
中国科学院知识创新工程重要方向(KJCX2-Yn-M01)
