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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
收稿日期:2020-11-19  
DOI:10.11980/j.issn.0254-508X.2021.03.003
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
基金项目:广州市珠江科技新星专项(201806010141)。
作者单位邮编
张宏伟 华南理工大学制浆造纸工程国家重点实验室广东广州510640 510640
谢鸿 华南理工大学制浆造纸工程国家重点实验室广东广州510640 510640
方志强 华南理工大学制浆造纸工程国家重点实验室广东广州510640 510640
刘映尧 华南理工大学制浆造纸工程国家重点实验室广东广州510640 510640
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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.
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