Fabrication And Its Property Of Electro-magnetic Function Polymer Nanocomposites With Core/Shell Nanoparticle Structure

Polymer nanocomposites are because has the characteristics of structuraldiversity, high performance and multi-function, has attract the attention of academiaand industry to become the new hot research topic in the field of materials.In thefamily of nanocomposites, a kind of core structure of inorganic particle/polymernanocomposites in energy storage, magnetic coating, anti radar tracking,electrochemical sensors and communications devices has a wide range of applicationhas become one of hot research and the development trend of the future.This papermainly with conductive polythiophene as the research object, through the surface ofinorganic nanometer particle to the decoration, in the inorganic nanometer particlesurface grafted polythiophene, core/shell structure of composite material is prepared。The conductive properties of composite materials offer thiophene and physicalstructure properties of the nanoparticles at an organic whole, after the study ofdifferent nanoparticles grafted polythiophene and the absorbing properties andelectrochemical properties of influence.In this experiment, we adopt the nanoparticles mainly include nanometertitanium dioxide particles and with absorbing performance of perovskite oxidenanoparticles（La0.6Sr0.4MnO3）and the surface amino modified nano graphenefilms.We first to polymerization of thiophene monomer derivatives, then carries onthe modification of synthesis of thiophene, get the end group contains aldehyde groupof thiophene derivatives.Preparation of TiO2nanoparticles by using the method of insitu dispersion polymerization/polythiophene composite materials.Again afterpolythiophene end groups of aldehyde group and nanoparticles on the surface of thechemical reaction between the amino, polythiophene was synthesized by grafting ofgraphene and lanthanum manganese strontium oxygen (La0.6Sr0.4MnO3) core-shell structure composite materials.By including nuclear magnetic resonance (NMR)spectrometer, Fourier infrared transform spectrum, SEM, TEM, XRD, UV-VIS thechemical testing means, such as the synthesis of composite materials werecharacterized and testing.Through cyclic voltammetry of TiO2mixed theelectrochemical properties of polythiophene composites were studied.The resultsshow that with TiO2, the quantity of mixed composite oxidation reduction potentialdifference (Δ E), and compared with the pure polythiophene, composite conductiveperformance is improved.The same method, but also to graft polythiophene graphenecomposites were studied.In addition, we through the vector network analyzer (2-18GHZ) in a certainfrequency range of the sample were analyzed.Compared the results with other data,the amino modified graphene with our synthetic terminal baseband aldehyde group ofthiophene both have certain absorbing properties.And the results showed thatpolythiophene/graphene core-shell structure composite microwave reflection lossvalue with have certain dependence, sample thickness as the sample thicknessincrease, the microwave absorption value also increased.