石墨烯导电墨水的制备及其纸基电路的导电性能

Preparation of Graphene Conductive Ink and Conductive Properties of Paper Base Circuit

关键词:  石墨烯  导电墨水  纸基电路  柔性电子

Key Words:graphene  conductive ink  paper base circuit  flexible electronic

摘要:以石墨烯为导电填料，使用十二烷基磺酸钠（SDS）为调节助剂，制备了石墨烯导电墨水，在研究该墨水性能的基础上，采用划线法制备了纸基柔性电路，研究了墨水在纸基表面的状态及纸基电路的导电性能。结果表明，SDS可有效调节石墨烯导电墨水的表面张力及黏度，当SDS用量为0.2 mg/mL时，石墨烯导电墨水的表面张力为39.89 mN/m，黏度为9.03 mPa·s，石墨烯方阻为179.8 Ω/sq。由石墨烯导电墨水制备的纸基电路具有优异的导电性能，当导线长度L=5 cm时，其电导率为2.81×10² S/m；且该纸基电路具有优异的柔性及稳定的导电性能，在经弯折180°或揉搓后其仍保持较好的导电性能，接在导电通路中仍可使二极管发亮。

Abstract:Graphene conductive ink was prepared with graphene as conductive filler and sodium dodecyl sulfonate （SDS） as adjusting agent. Based on studying the performance of the ink， a paper-based flexible circuit was prepared by the scribing method， the behavior of the ink on the paper-based surface and the conductivity of paper-based circuit were studied. The results showed that SDS could effectively adjust the surface tension and viscosity of the graphene conductive ink. When the dosage of SDS was 0.2 mg/mL， graphene conductive ink had a surface tension of 39.89 mN/m， a viscosity of 9.03 mPa·s， and a square resistance of 179.81 Ω/sq. The paper-based circuit prepared from graphene conductive ink had excellent conductivity， flexibility and stable electrical conductivity. When the length of circuit was 5 cm， its conductivity was 2.81×10² S/m. Moreover， the paper-based circuit could still make a diode bright in the conductive path after bending 180° or kneading.