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Preparation and Properties of Conducting Polymers with Electromagnetic Function

Author: WangYue
Tutor: ZhangZhiMing
School: Ocean University of China
Course: Marine Chemistry
Keywords: 3,4-Polyethylenedioxythiophene pyrrole chemicalone-step method electro-magnetic function micro/nanostructure
CLC: O631
Type: Master's thesis
Year: 2013
Downloads: 26
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Abstract


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.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers
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