| Graphene is a two-dimensional carbon material with a single atomic thickness.It has excellent physical and chemical properties.As a graphene precursor and important functional material,graphene oxide(GO)with oxygen-rich groups on its surface can be dissolved in a variety of solvents.Moreover,the GO based functional materials are also achieved by using these oxygen-related groups.In this dissertation,a series of multi-functional graphene-based composites with different dimensions were developed by assembling aniline and pyrrole molecules with graphene oxide.And according to the characteristics of these materials,they are applied to capacitors,actuators and other fields.The main contents and conclusions of this dissertation are as follows:The preparation and application of graphene oxide based plasticine.A novel multifunctional compound was prepared by assembling the GO nanosheets with aniline in solution.GOP is a potential 3D printing of raw materials,with excellent plasticity.A macroscopic 3D structure,2D thin film and 1D fiber-like structure can be easily obtained by using mould extrusion method.Furthermore,GOP pattern based devices on various substrates are also realized by using simple template printing method,which show good capacitance performance.Such GO plasticine can be further processed with the use of laser direct writing technology.Besides,it can be extended to prepare composites by simply mixing other functional materials with GOP.The preparation and actuating application of partially reduced graphene-polypyrrole film.A facile one-step approach has been developed to fabricate partially reduced graphene oxide-polypyrrole(prGO-PPy)film via self oxidation-reduction strategy,in which graphene oxides act as the oxidant to polymerize pyrrole into PPy leading to the spontaneous partially reduction of GO and cross-linking between prGO and PPy viaπ-πinteraction.Using the above-mentioned mechanism,a humidity response actuator having an asymmetric structure(graphene oxide/partially reduced graphene oxide-polypyrrole)was designed and constructed by exposing one side of the GO film to pyrrole vapor and the other is sealed for certain time at room temperature.In addition,the electrochemical actuator based on graphene/graphene-polypyrrole asymmetric structure was also achieved.The preparation of partially reduced graphene oxide-polypyrrole complex aerogels.A partially reduced graphene oxide-polypyrrole complex aerogel possesses a three-dimensional structure with a density of 300 mg/cm~3 were prepared by simple atmospheric pressure drying method.The principle of this method is the graphene oxide solution and pyrrole steam to form a hydrogel by a small amount of sulfuric acid induced,the hydrogel using atmospheric drying method to remove excess water to form aerogel.Atmospheric pressure drying method compared to freeze-drying or supercritical drying method is more economical and environmentally friendly and can be large-scale production. |
