| Conducting polymers,an important class of the polymer materials,have attracted a wide range of interest because of their excellent optical,electrical properties and reversible redox properties,and have become a hot topic of scientific research.Nanocomposites of conducting polymers which combine good electrical properties of conducting polymers and excellent functions of other materials have broad application prospects.Based on polyaniline,polypyrrole and polythiophene derivatives,preparation,design and functionalization of the conducting polymer nanocomposites are studied in this thesis.Preparation and application of size-controllable polypyrrole nanospheres with an anionic polyelectrolyte as structure directing agent,one step preparation of polyaniline-rGO composite hydrogel with iodine doping of graphene and its electrochemical properties,synthesis and electrochromic performance of thiophene derivatives with iron cyanide end are investigated and achieve novel research results as follow:(1)Preparation and characterization of size-controllable polypyrrole nanospheresWe suggest a method to synthesized polypyrrole nanospheres by using an anionic polyelectrolyte,N-methylene phosphonic chitosan,as a structure directing agent.The polypyrrole nanospheres with regular morphology and uniform size are afforded by electrostatic interaction between pyrrole and N-methylene phosphonic chitosan.The size of the PPy nanospheres can be adjusted with a diameter from 50 to 190 nm by simply changing the amount of N-methylene phosphonic chitosan.The as-prepared polypyrrole nanospheres exhibit good electrochemical properties and potential application as electrode materials of supercapacitors;or can be combined with carbon dots to form composite nanospheres presenting enhanced fluorescence intensity which show potential application in fluorescence detection.(2)Preparation of iodine doped polyaniline-reduced graphene oxide composite hydrogel and the study of its capacitive propertiesWe develop novel one step method to obtain a polyaniline-rGO composite hydrogel.With the interactions of oxidation and reduction of I2 and I-,the reduction of GO and the polymerization of aniline can afford simultaneously,and achieve the construction of iodine doped polyaniline-reduced graphene oxide composite hydrogel,in which polyaniline nanoparticles cover on the rGO sheet uniformly with the π-πinteractions between rGO and PANI.The energy storage capacity of the hydrogel and the influence of iodine doping with polyaniline and rGO are investigated.We find that the iodine doping effectively improve the electrical conductivity and the electrochemical performance of the hydrogel.The iodine doped PANI-rGO composite hydrogel is a potential candidate of electrode materials for electrochemical energy storage.(3)Synthesis and electrochromic performance of thiophene derivatives with ferricyanide endA new thiophene derivative with ferricyanide end is designed and synthesized.The afforded thiophene derivative can be polymerized in aqueous phase for the assistant of ferricyanide end,which makes this thiophene derivative water soluble,and the thiophene derivative will self-assemble forming as nanoparticle structure while polymerized in water.The UV absorption and band gap properties of this derivative are studied,and find a narrow band gap and good optical property with the interaction between thiophene and prussian blue.This material exhibits a three-color electrochromic property,suggesting their potentiality for application in new electrochromic materials. |
