Reverse Micelles In Situ Composite Legal System Preparation Of Ag / Polyaniline Composite Materials Research

As a new functional material, conductive polymer-metal nanocomposite has attracted considerable attention due to its specific nature of metal, organic and nanoparticles and potential applications in the electronic, optical, catalytic, electromagnetic shielding and other fields. Reverse micelle system is an efficient method for preparation of new nanocomposite materials, the polymer synthesized in reverse micelle system has high molecular weight, small particle size distribution, high spceific surface area, regular chains and spceial properties.This article aims to highlight the essential details of two methods to synthesize Ag/polyaniline nanocomposites, the mechanism of the core-shell Ag/polyaniline nanoparticles' formation in reverse micelle was also proposed. The structure and morphology of the products were charactered by UV-visible spectra, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The conductive performance, thermal stability property and electrochemical behaviour of the Ag/polyaniline nanocomposites were investigated by conductivity test, thermogravimetric analysis and electrochemical performance test.1. Ag/polyaniline nanocomposites were synthesized by two-setp method in reverse micelle. The nanocomposites possess the core-shell structure with the polyaniline as the shell and the nano-silver particles as the core, moreover, the shell was emeraldine salt form in the Ag/polyaniline nanocomposites. The highest electrical conductivity of the Ag/polyaniline pellet was 68.54 S/cm, whereas the polyaniline matrerial was found to be 2.3×10-2 S/cm. Thermal gravimetric analysis showed that the degradation temperature of composites was higher than polyaniline. The degradation temperature of Ag/polyaniline was found over 370℃, compared 340℃of polyaniline.2. UV-Visble light irradiation was used to prepared Ag/polyaniline nanocomposites by one-pot method in reverse micelle. The highest electrical conductivity of the Ag/polyaniline pellet was 95.89 S/cm. The degradation temperature of Ag/polyaniline was found over 375℃, compared 340℃of polyaniline. The electrochemical performance test showed that the specific capacity and corrosion resistance of Ag/polyaniline nanocomposites was higher than polyaniline.3. Ag/polyaniline nanocomposites were synthesized by doping HNO3, p-toluenesulfonic acid and 5-sulfosalicylic acid, respectively. The Ag/polyaniline doping of p-toluenesulfonic acid presented the highest electrical conductivity, reached to 215.14 S/cm.