中文摘要：

传统印刷技术与微电子制造的交叉技术——印刷电子技术的发展得益于微纳米材料制备技术的成熟.二维纳米碳材料石墨烯由于其独特的结构和突出的性能,可与传统金属或高聚物材料共同作为导电墨水主要导电组分.本文讨论了目前石墨烯导电墨水制备中的关键问题、不同制备方案及其优劣之处;评述了石墨烯导电墨水印刷工艺的研究进展,包括传统印刷技术和新型印刷技术中的应用与难点.最后,总结了石墨烯导电墨水在柔性功能器件（基本电路元件、能量存储和力学/化学传感器件等）中的应用现状.

英文摘要：

Electronic printing is an interdisciplinary technology of traditional printing technology and microelectronics manu-facturing. The development of electronic printing has mostly benefited from the progress of nanomaterials research. Graphene, a novel two-dimensional carbon nanomaterial, has shown excellent electrical, thermal, optical properties in flexible electrical devices. Graphene with traditional metals or polymer materials together could act as the main conductive components in conductive ink. Printing of graphene ink represents a cost-effective deposition technique to obtain patterned conductive graphene films, and further assemble them into functional electrical devices. Therefore, electronic printing based on graphene conductive ink is one of the recent research hotspots. In this paper, we review recent developments and advances in research of graphene conductive ink. This review begins with an introduction of different preparation strategies for graphene conductive inks. For printing, the three major pathways for producing graphene sheets are oxidation-reduction, solvent exfoliation and electrochemical expansion of graphite. Different preparation strategies for conductive inks are classified into three major methods： Graphene inks stabilized by surfactants or functional groups, and graphene-based composite conductive ink. The detailed review of graphene conductive ink preparation is discussed with specific examples. Preparation of graphene conductive inks of high concentrations, stability and printing adaptability is the key issue in electronic printing. Subsequently, an introduction of common printing methods and principles is given. Five printing methods are discussed in this review, including inkjet printing, gravure printing, transfer printing, direct writing and threedimensional（3D） printing. Printing is kind of additive manufacturing, by depositing graphene onto substrates of various materials, sizes, flexibility and roughness for conductive pattern. Different printing techniques have unique