Large-scale preparation of graphene oxide film and its application for electromagnetic interference shielding

Lijian Xu; Wenqian Zhang; Ledong Wang; Jie Xue; Shifeng Hou

doi:10.1039/d1ra06070h

Large-scale preparation of graphene oxide film and its application for electromagnetic interference shielding

RSC Adv. 2021 Oct 11;11(53):33302-33308. doi: 10.1039/d1ra06070h. eCollection 2021 Oct 8.

Authors

Lijian Xu^{1

2}, Wenqian Zhang^{1

2}, Ledong Wang³, Jie Xue^{1

2}, Shifeng Hou^{1

2}

Affiliations

¹ School of Chemistry and Chemical Engineering, Shandong University Jinan Shandong 250100 P. R. China.
² National Engineering Research Center for Colloidal Materials, Shandong University Jinan Shandong 250100 P. R. China.
³ School of Physics, Shandong University Jinan Shandong 250100 P. R. China.

Abstract

In this work, a large-scale preparation of graphene oxide (GO) film is reported, and the structure and the compositional variation was studied after thermal annealing. The electromagnetic interference (EMI) shielding performance of thermally reduced GO films was also investigated. Commercial GO clay was well dispersed by high-speed shearing and formed a stable slurry with a high solid content in water (5%), and this was chosen rather than organic solvent due to its optimal performance in coating procedures and film quality. The optimized thermal annealing procedure resulted in a significant enhancement of electric conductivity and EMI shielding efficiency, which reached 500 S cm^-1 and 32-42 dB with the thickness under 0.1 mm. The excellent EMI shielding efficiency of thermally reduced GO film, as well as the easily amplified pilot manufactoring procedure adaptive to commercial equipment, produce graphene for universal EMI shielding materials.