摘要
Finer nanoplates of silver are prepared by self-assembly on the surface of graphene,and the low-temperature sintered high conductivity ink containing the silver nanoplates is prepared.Most importantly,graphene is added to the solution before the chemical reduction reaction occurs.Firstly,it is found that silver nanoplates have self-assembly phenomenon on the surface of graphene.Secondly,the Ag nano hexagonal platelets(AgNHPs)with small particle sizes(10 nm),narrow distribution and good dispersion are prepared.Especially,smaller sizes(10 nm)and narrower particle size distribution of AgNHPs particles can be easily controlled by using this process.Finally,the conductivity of the ink is excellent.For example,when the printed patterns were sintering at 150℃,the resistivity of the ink(GE:0.15 g/L)reached the minimum value of 2.2×10^-6 cm.And the resistivity value was 3.7×10^-6Ωcm,when it was sintered at 100℃ for 30 min.The conductive ink prepared can be used for the field of printing electronics as ink-jet printing ink.
采用石墨烯诱导,制备出六角片状纳米银,并最终制备出在低烧结温度下导电性能好的纳米银墨水.其中核心之处是将石墨烯以原料的方式提前加入反应液中制备纳米银颗粒.研究发现,制备过程中纳米银颗粒在石墨烯表面具有自组装现象.其次,制备出的六角片状纳米银颗粒粒径小(10 nm)、分布窄、分散性好.特别是,本文采用的制备粒径小、分布窄的纳米银片的工艺更容易控制,更有利于批量生产.最后,制备的石墨烯-纳米银混合导电墨水具有优良的导电性.如,当石墨烯含量为0.15 g/L,在150℃烧结后,印刷制成的导电线路的电阻率达到最小值为2.2×10^-6Ω·cm.在100℃烧结30 min后,电阻率为3.7×10^-6Ω·cm.制备的混合导电墨水可用于印刷电子喷墨打印领域.
作者
LIU Piao
HE Wen-qiang
LU An-xian
刘飘;贺文强;卢安贤(Hunan LEED Electronic Ink Co.,Ltd.,Zhuzhou 412007,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China)
基金
Project(2018GK4015)supported by the Hunan Provincial Strategic Emerging Industry Project,China
