Preparation And Study Of Graphene Conductive Composites

Graphene is a two-dimensional material with a relatively unique atomic structure and a large specific surface area.It is excellent in adsorption,conduction,thermal conductivity and thermal stability,and is used as an ideal carrier for composite materials.Its research on optics,biomedicine and energy storage is also very extensive.In the study of many graphene composites,the properties of graphene-based composites in the fields of light,electricity,power,heat and so on are studied mainly with graphene and polymer.It is studied in combination with inorganic and metal materials.less.Graphene excellent performance,which is favored by scientists,hoping to apply it to more areas to go.Now,the preparation of graphene: more methods,the limiting factor is also more.Redox method used the most,the most extensive But after the strong acid,strong oxidant treatment of graphene in the structure is not complete and poor conductivity,so that the application of graphene is a great challenge.Polypyrrole is a kind of conductive polymer itself,through the doping of its conductivity will improve;carbon nanotubes and graphene as good quality;silver is the best conductive in a metal,electronic structure and specific surface area The It is hoped that the graphene will be compounded with them to obtain a better composite material.Therefore,the work of this paper is mainly as follows:First,GO was prepared by modified Hummers method.Then,the oxidation degree and microstructure of GO were observed and analyzed by XRD,FTIR,UV,Raman,SEM and TEM.Three different reductions were used The reagent measures the block resistance,which is characterized by the most thorough reduction of hydroiodic acid.Second,the experiment RGO and PPY preparation method for the in situ polymerization method,in order to make the compound under the better,we chose a different reagent as a dispersion,the phenomenon and the results of the control we have polyethylene glycol 400 is the best for dispersants.Thirdly,the surface morphology and internal structure of the composites were observed and analyzed by SEM and TEM.Then,the microcosmic changes were observed by FTIR,X-ray diffraction,UV and Raman spectroscopy.Finally,TG and four probes The thermal stability and electrical conductivity of the composites were tested and characterized.It was found that PPY,CNT and Ag-NT were better dispersed in graphene.And their addition makes the structure of RGO become more structured,the conductivity of composite materials have been improved to varying degrees,thermal stability has improved a lot.Fourthly,the changes of the conductivity of PPY,CNT and Ag nanowires on the conductivity of conductive composites were studied.The results show that there is a tendency to increase the conductivity of conductive composites with the change of polypyrrole,carbon nanotubes and silver nanowires.The reason may be that PPY,CNT and Ag silver nanowires form local in the graphene-based composites When the network conducts the structure,the electrons are accelerated by the tunneling effect,and the electrical conductivity is increased.Thus,the balance of economy and conductivity can be achieved by optimizing their additions.