| abstract |
The invention discloses a graphene-containing composite material and its preparation method and application. The graphene-containing composite material comprises a composite functional material with double conductive channels and a polymer matrix. The composite functional material with dual conductive channels is a conductive polymer poly3,4-(ethylenedioxythiophene) grafted on the surface of sulfonated graphene, and its general structural formula is shown in formula 1. Composite functional materials with dual conductive channels and graphene-containing composite materials can be used to prepare piezoresistive response materials or antistatic, electromagnetic shielding materials, etc., with excellent piezoresistive response, piezoresistive repeatability and electromagnetic shielding effect; The invention is simple and easy to operate, and can be produced on a large scale. It has excellent piezoresistive performance, has a very sensitive piezoresistive response, and the percolation threshold is only 0.5Wt%. It can not only maintain the original properties of the polymer, but also form an unstable The conductive network system is beneficial to improve the sensitivity of piezoresistive response. |