▎ 摘　　要

In this study, a graphene foam/polydimethylsiloxane (GF/PDMS) force-sensitive composite with excellent electrical, mechanical, and electromagnetic interference (EMI) shielding performances was prepared. GF with different contents of graphene was prepared by chemical vapor deposition (CVD) and GF/PDMS composites were prepared by vacuum-assisted impregnation. The electrical test and morphology detection indicated good conductivity and flexibility of the proposed composite. Indeed, the GF/PDMS composite with 0.4 wt% graphene had the highest conductivity (4 S cm(-1)). The EMI shielding performance of the GF/PDMS composite with 0.4 wt% graphene in the X-band was tested and its EMI shielding effectiveness (SE) was 32 dB. After repeated bending for 10000 times, the EMI SE of the proposed composite exhibited negligible changes. The force sensitivity test showed that the sensitivity of the proposed composite was 8.7 KPa-1 under the tensile strain of 30%-50%. Under the pressure of 600-1000 KPa, the sensitivity of the proposed composite was 0.15 KPa-1. Under the stress of 1000 KPa, the EMI shielding coefficient of the proposed composite was 25 dB, which was reduced by 21.9%. The results demonstrated that GF/PDMS with low filler contents (0.4 wt%) exhibited high conductivity (4 S cm(-1)), high EMI SE (32 dB), and excellent mechanical properties.