氮掺杂石墨烯墨水的制备及理化特性  

Preparation and physicochemical properties of nitrogen-doped graphene inks

作　　者：胡克文 李贺军[1] 齐乐华[2] 罗俊[2] 连洪程 HU Ke-wen;LI He-jun;QI Le-hua;LUO Jun;LIAN Hong-cheng(State key Laboratory of Solidification Processing,School of Materials and Engineering,Northwestern Polytechnical University,Xi′an 710072,China;School of Mechanical Engineering,Northwestern Polytechnical University,Xi′an 710072,China)

机构地区：[1]西北工业大学凝固技术国家重点实验室材料学院,陕西西安710072 [2]西北工业大学机电学院,陕西西安710072

出　　处：《新型炭材料》2020年第4期444-451,共8页New Carbon Materials

基　　金：国家自然科学基金(51772245);西北工业大学研究生创意创新种子基金项目(ZZ2018074).

摘　　要：氮掺杂石墨烯墨水浓度低、缺陷多、易发生团聚,制约了功能器件的发展。本文利用化学氧化还原法与溶剂热法制备出氮掺杂含量为8.58 at%、电导率为257.2 S·m-1的石墨烯墨水。通过添加不同比例的表面活性剂如SLS、SDS、SDBS,所制墨水Zeta电位为-50^-90 mV,且分散稳定性良好。利用所制氮掺杂石墨烯墨水打印出线宽约为250μm的直线,线条内部氮掺杂石墨烯分布均匀、成膜性好,为功能器件的制备奠定了基础。Nitrogen-doped graphene ink is still not perfect for printing because of its low concentration, many defects, and easy agglomeration, limiting its use in functional printing devices. To solve these problems, nitrogen-doped graphene(NG) was prepared from nature flake graphite by a combined chemical oxidation-reduction and solvothermal method. It was dispersed in water with a help of a surfactant to prepare stable NG inks with a high NG content. Results indicate that the NG has a nitrogen content of 8.58 at% and an electrical conductivity of 257.2 S·m-1. The stability of the dispersion of aqueous NG inks is regulated by controlling the mass ratio of the surfactant, sodium dodecyl sulfonate(SLS), sodium dodecyl sulfate(SDS), or sodium alkylbenzene sulfonate(SDBS), to NG. The physicochemical properties of the stable NG inks in water can be regulated by adding SLS, SDS, or SDBS in different proportions. The zeta potentials range from-50 to-90 mV, viscosities from 1 to 3 mPa·s and surface tensions from 30.8 to 71.9 mN/m. A uniform NG line with a width of 250 μm is printed by uniform droplet spraying with an optimized NG ink. The NG in the line is uniformly distributed to form an excellent film. This work suggests a simple method for the production of stable NG inks, which might pave the way for preparing NG-based functional devices.

关 键 词：石墨烯 氮掺杂 墨水 均匀微滴喷射 

分 类 号：TB332[一般工业技术—材料科学与工程]