Synthesis And Characterization Of Inverse Opals Polyaniline

In the field of new functional polymer materials, polyaniline(PANI) because of the simple synthesis process, strong thermal stability, high doped conductivity, perpect characteristics of electrochemical reversibility and so on attracted widespread attention.At the same time Polyaniline have great value in the field of electrode materials.for its unique doping- dedoping process and pseudo capacitance storage In the field of porous materials, the inverse opal structure material have high porosity, large surface area, narrow pore size distribution and structural features such as three-dimensional long-range order. It has demonstrated a very broad application prospects in the field of membrane materials, photonic crystals, new catalyst, adsorbent materials and electrode materials. Combined with nanotechnology, synthetic conducting polymers and their composites with a special structure, improve its electrochemical properties, which in the research field of conducting polymers, is a challenging and highly potential applications of the subject.In this paper,for the preparation with special structure of conductive polymers and their composites to expand, we based on Si O2 spheres and Si O2 microspheres template to prepare core-shell structure Si O2-PANI and opal structure Si O2-PANI by the solution method,then removed the silicate spheresto get the PANI porous and inverse opal structure of PANI, the products were the study of structural analysis and performance. The main research contents and results are as follows:①By modified St?ber method,we successfully prepared with the uniform size and monodisperse Si O2 microspheres, then to explore the technical conditions for preparing 360 nm Si O2 microspheres, microspheres have modified and subsequent template assembly tothe opal templates. Based on silica microspheres and Si O2 microspheres template, we have preparedwithcore-shell structure Si O2-PANIand opal Si O2-PANI, the preparation conditions were discussed, and the composite materials were removedby HF acid treatment, the porous PANI and inverse opal polyaniline(IO-PANI), the structure, morphology and electrochemical performance of these materials were characterized infrared spectroscopy(FT-IR), X- ray diffraction(XRD), four probe conductivity meter, scanning electron microscope(SEM), transmission electron microscopy(TEM), CV, charge-discharge tests.②The centrifugal deposition template has the best structure.Experiments are take in 1 mol L-1 HCl, molar ratio of nAPS:nAn=1:1 conditions, with increasing mPANI:m Si O2, the conductivity of core-shell Si O2-PANI increased from 1.7S cm-1to 11.3 s cm-1, after removing Si O2 microspheres to get porous PANI, the conductivity change is not very obvious; for opal structure PANI/Si O2, aniline concentration is at 0.4 mol / L, opal PANI/Si O2 reached highest value of 27.4 s cm-1,after remove Si O2 microspheres its conductivity decreased greatly. Preliminary conclusions can be obtained, the ordered PANI microstructures directly affects the performance of conductive material. After the removal of Si O2 microspheres, disordered pore structure and the structure collapse will reduce the conductivity of the material.③In the electrochemical test of the polyaniline with a scanning rate Si O2/PANI(opal), and IO-PANI materials show better electrochemical activity and larger capacitance performance; from 0.2 A g-1 to 5 A g-1, compared to the core-shell Si O2-PANI, Si O2-PANI(Opal), porous PANI and PANIcomposite, IO-PANI specific capacitance reached 375 F g-1(0.2A g-1) far more than other materials In increased progress of 0.2 A g-1 to 5 A g-1, compared to specific capacitance changes of other materials,IO-PANI and Si O2/PANI(opal) have the higher retention rate.