| 摘要 |
A particle dispersion comprises a solvent, a binder soluble in the solvent and carbon nanoparticles uniformly dispersed within the binder. The binder and nanoparticles may be functionalised with complementary groups so that the binder preferentially binds to the nanoparticles. The nanoparticles may comprise graphene nanoplatelets or carbon nanotubes functionalised with groups comprising oxygen, carboxylic acid, amine or metal. The binder may be functionalised with groups comprising hydroxyl, methylol, carboxylic, epoxy, isocyanate, amide or imide. The binder may be a conductive polymer, such as a polythiophene or polycationic polymer, e.g. poly-3,4-ethylenedioxythiophene (PEDOT), poly-3,4-ethylenedioxythiophene-polystyrene sulphonic acid (PEDOT:PSS), polyaniline, and polypyrrole. Alternatively, the binder may be a thermosetting or thermoplastic polymer. The dispersion preferably contains 1-5 wt.% carbon nanoparticles and 10-50 wt.% binder and may be in the form of an ink. A method of preparing a film comprising evaporating a solvent and shrinking the distance between binder components so as to reduce the volume of the mixture is also disclosed. |
