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Preparation of Graphene Conductive Ink and Conductive Properties of Paper Base Circuit
Received:November 19, 2020  
DOI：10.11980/j.issn.0254-508X.2021.03.003
Key Words:graphene  conductive ink  paper base circuit  flexible electronic
Fund Project:广州市珠江科技新星专项（201806010141）。
Author NameAffiliationPostcode
ZHANG Hongwei State Key Lab of Pulp and Paper Engineering，South China University of Technology， Guangzhou，Guangdong Province，510640 510640
XIE Hong State Key Lab of Pulp and Paper Engineering，South China University of Technology， Guangzhou，Guangdong Province，510640 510640
FANG Zhiqiang State Key Lab of Pulp and Paper Engineering，South China University of Technology， Guangzhou，Guangdong Province，510640 510640
LIU Yingyao State Key Lab of Pulp and Paper Engineering，South China University of Technology， Guangzhou，Guangdong Province，510640 510640
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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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