Large-scale preparation of graphene oxide film and its application for electromagnetic interference shielding. Issue 53 (11th October 2021)

• Record Type: Journal Article
• Authors: Xu, Lijian; Zhang, Wenqian; Wang, Ledong; Xue, Jie; Hou, Shifeng
• Is Part Of: RSC advances. Volume 11:Issue 53(2021)
• Page Start: 33302
• Page End: 33308
• Publication Date: 2021-10-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra06070h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A large-scale preparation of graphene oxide (GO) film is reported, and annealing process improve the electromagnetic interference shielding performance of the film by structure and compositional variation. 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.