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

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0.2mg/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179.8Ω/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2.81×10^(2)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。

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. 81×10^(2)S/m. Moreover,the paper-based circuit could still make a diode bright in the conductive path after bending 180° or kneading.