一步法制备银打印墨水中颗粒形貌对导电性能的影响  

Effect of particle morphology on electrical conductivity in silver print ink synthesized by one-step method

作　　者：蔡雯君 张哲娟 胡强 才滨 孙卓 

机构地区：[1]华东师范大学物理与材料科学学院纳光电集成与先进装备教育部工程研究中心,上海200062

出　　处：《功能材料》2017年第10期10192-10197,共6页Journal of Functional Materials

基　　金：国家青年自然基金资助项目(11204082);上海闵行区企校合作项目(2015MH218)

摘　　要：引入了一种操作简便的制备高固含量银纳米墨水的方法,以月桂酸作为保护剂,水合肼作为还原剂,一步发制备出粒径均匀,尺寸为20nm,且固含量可达14%的银导电墨水。分别探究了硝酸银用量,水合肼含量等因素对产物形貌和固含量的影响。采用冷场发射扫描电子显微镜和紫外可见分光光度计对产物的形貌和尺寸分布进行了测试。最后,银墨水经小于200℃的低温烧结后,获得电阻最低为17mΩ/的银薄膜层,为纳米银墨水在柔性电路中的应用奠定了基础。A simple one-step method for synthesizing nano-silver print ink with high-solid content is introduced in this study. Lauric acid （C12H24O2） is used as the protectant, when hydrazine hydrate （N2H4 · H2O） is used as deoxidizer. In this way, the silver conductive ink with the solid content of 14% is fabricated, where the diameter of silver particles is 20 nm. The effects of the silver nitrate amount and hydrazine hydrate content on the morphology and solid content of the products were investigated. The morphology and dimension distribution range of nano-silver print ink are characterized by scanning electron microscope and UV-Vis spectrophotometer. It is concluded that the morphology and solid content are directly affected by the molar concentration of silver nitrate and hydrazine hydrate. After sintering below 200 ℃, the resistance of silver film based on nano-silver print ink was as low as 17 mΩ/□, which established the foundation for the application of nano silver ink in the flexible circuit.

关 键 词：纳米银颗粒 银墨水 3D喷墨打印 

分 类 号：TB31[一般工业技术—材料科学与工程]