Preparation And Properties Of Conducting Polymers With Electromagnetic Function

Conducting polymers not only have electrical conductivity of metals,magnetic and optical properties, but also retain mechanical properties andprocessable properties of the traditional polymer materials. Especially, conductingpolymers with micro/nanostructures have attracted great attentions due to theexcellent physical, chemical properties and promising applications. In this thesis,fist of all, electromagnetically functionalized poly（3,4-ethylenedioxythiophene）（PEDOT） micro/nanostructures were prepared by a "chemical one-step" method.Secondly, hollow polypyrrole octahedrons were obtained by using cuprous oxide（Cu2O） crystals as templates. The main results are as the following:1. The formation mechanism of electromagnetically functionalized PEDOT/γ-Fe₂O₃microbowls was proposed. The hydrophobic EDOT monomers wereencapsulated into the CTAB micelles to form EDOT filled spherical CTAB micellesin the ammonia solution. The-Fe₂O₃nanoclusters are prepared in the basicconditions, and their surfaces are negatively charged with the oxygen ions. Thenegatively charged-Fe₂O₃nanoclusters are attracted by the positive ions of CTABmicelles filled with EDOT on the cluster shells via ionic interaction, thus coating the-Fe₂O₃nanoparticles in a micelle-like fashion to form spherical droplets. With theaddition of FeCl₃,the pH value of the reaction solution decreased promptly to <7, theprotons in the reaction system competed to attract to the-Fe₂O₃cluster shells andCTAB micelles filled with EDOT mainly accumulated in the bottom of dropletsbecause of larger mass. The oxidative polymerization of the monomer could proceedon the surface of the-Fe₂O₃cluster.2. The―chemical one-step‖method was improved to prepare poly（3,4-ethylene-dioxythiophene）/γ-Fe₂O₃microbowls. APS was used as the oxidant of EDOTand FeCl2. Fe²⁺is oxidized by APS to form the Fe³⁺source of the magnetic particles γ-Fe₂O₃was prepared.3. Under the condition of ammonia, hollow octahedrons or microspheres ofpyrrole were successfully prepared by using cuprous oxide （Cu2O） crystals astemplates. Compared with the common template method, post-treatment of removingtemplate can be omitted due to soluble Cu²⁺formed by the reaction of Cu2O with APSduring the polymerization process.