Studies On Conductivity And Preparation Of Conductive Polymer/Ionic Liquid/Clay Nanocomposites

As an important functional conductive material, E-type conductive polymer (Polyaniline, polypyrrole, polythiophene, etc.) has many excellent, broad application prospects in microelectronics, catalytic materials, biological engineering, rechargeable batteries, electrochromic devices and chemical transistors. In recent years, composite conductive polymer has become hotspots of the study of scientific workers, inorganics/ conductive polymer composite material is one of the hot. This research made a breakthrough of the study of conductive polymer/nanoclay. A series of conducting polymer/ionic liquid/nanoclay composite materials were prepared, then we gived a discussion on chemical structure, thermal and electrical conductivity changes.1.This summary is divided into the flowing parts: chemical structure, conducting mechanism, synthesis and the status of modification of polyaniline; chemical structure, conducting mechanism, synthesis and the status of modification of polypyrrole; properties and applications of ionic liquid; structure and modification of nanoclay.2. Sodium montmorillonite(Na+-MMT) was modified with 1-carboxymethyl-3- methylimidazolium chloride. Conductive polyaniline/ionic liquid/montmorillonite (PAn/CMMIm/MMT) nanocomposites have been prepared by chemical oxidative polymerization. PAn/CMMIm/MMT nanocomposites were characterized by the measurement of FTIR, XRD and TG.. The results showed that the conductivity of PAn/CMMIm/MMT nanocomposites was 2.5 times as much as PAn/Na+-MMT and 7.5 times as much as PAn, and a discussion in conductivity was gived from the aspect of the chemical structure change.3. Sodium montmorillonite(Na+-MMT) was modified with 1-ethyl-3-methyl imidazolium bromine. Conductive polypyrrole/ionic liquid/montmorillonite (PPy/ EMIm/MMT)nanocomposites have been prepared by chemical oxidative polymerization. PPy/EMIm/MMT nanocomposites were characterized by the measurement of FTIR, XRD and TG.. The results showed that the conductivity of PPy /EMIm/MMT is decreasing with the EMIm/MMT dosage increasing. However, the electrical conductivity drop slightly, the processibility of PPy was modified because of the doping of EMIm/MMT.4. Sodium vermiculite(Na+-VMT)was modified with 1-ethyl-3-methyl imidazolI -um bromine. Conductive polyaniline/ionic liquid/vermiculite (PAn/EMIm/ VMT) nanocomposites have been prepared by chemical oxidative polymerization. The effects of the amount of different states of VMT (VMT modified by ionic liquid and exfoliated VMT) were discussed. The results showed that the conductivity of PAn/EMIm/VMT nanocomposites is gradually increasing with the EMIm/VMT dosage increased. The conductivity of PAn/EMIm/VMT reaches its maximum 11.1S/cm when the amount of EMIm/EMT got 7%, which is 5.5 times as much as PAn. But the conductivity of PAn/VMT(exfoliated) is decreased with the increasing of VMT.