Conductive Polyaniline-based New Environment To Stimulate The Design Of Ring Material, Preparation And Characterization

Conducting polymers such as polyaniline (PANI), polypyrrole (PPY) and polythiopHene (PTP) have been extensively investigated as effective materials for devices combining optical, electrochemical and conducting properties. Among them, polyaniline, as a particular conducting polymer, has received widespread attention because of its simple preparation procedure, low fabrication cost, high conductivity, good environmental stability and simple and reversible doping/dedoping chemistry feature, good solubility in suitable solvents, a rigid backbone and unique pH-switching capability. The objective of this paper is mainly to designs and synthesizes a novel functional material that responses to environmental stimuli on the basis of the unique electrical properties and pH-switching function of polyaniline.It is well known that the unique conductive properties of PANI depends on both the ability to transport charge carriers along the polymer backbones and the ability to hop the carriers between polymer chains. We synthesis and fabricate novel polyaniline films with different doping based on the property, and examined the electric response behavior of PANI films induced by THF solvent vapor molecules, and discussed the effect of the interaction among polyaniline, conductive carrier and solvent vapor molecules on the gas sensing response performance. It is another important feature of PANI that PANIs has a pH actuator property. Therefore, it is expected to be used as artificial muscles and drug release carriers. Currently, applications of PANIs in biological fields have gained more and more attention. At this stage, we discuss swelling and mechanical properties of the hydrogels in presence of PANI in different pH buffer solutions, combining a rigid backbone and unique pH-switching capability of PANI.This work includes the following two parts.First, polyaniline conducting polymers (PANI) doped with hydrochloric acid (HCl) or sodium dodecylbenzenesulfonate-HCl (SDBS-HCl) were synthesized via a chemical oxidation polymerization method. Fourier transform infrared spectrometer (FT-IR) and ultraviolet-visible absorption spectrometer (UV-vis) show that the characteristic peaks of doping PANIs shift to low wavenumbers and new absorption bands are observed in UV-vis, which suggests that the pHysicochemical properties of PANI are changed by the gallimaufry of HCl or SDBS-HCl, leading to an increase in conductivity according to the following order, PANI