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AOCHUANG CHEMICAL

Polyaniline

Supply of conductive polyaniline
content 99%
Cas number: 5612-44-2
polyaniline for analysis reagents

Polyaniline, a kind of polymer compound, has special electrical and optical properties, and can have conductivity and electrochemical properties after being doped. After certain treatment, various equipments and materials with special functions can be obtained, such as urease sensor, electron field emission source, which can be used as biological or chemical sensor, and more excellent reversible in charge and discharge process than traditional lithium electrode materials. Electrode materials, selective membrane materials, antistatic and electromagnetic shielding materials, conductive fibers, anticorrosive materials, and the like. Polyaniline has been widely studied and applied due to its easy availability of raw materials, simple synthesis process, good chemical and environmental stability.
The electroactive activity of polyaniline originates from the P-electron conjugated structure in the molecular chain: as the P-electron system in the molecular chain expands, the P-bonded state and the P*-inverse-bonded state form a valence band and a conduction band, respectively. The P-electron conjugated structure is doped to form a P-type and an N-type conductive state. Different from the doping mechanism of other conductive polymers to generate cation vacancies under the action of oxidant, the number of electrons in the doping process of polyaniline does not change, but the decomposition of doped protonic acid produces H+ and counter anions (such as Cl-, Sulfate, phosphate, etc. enter the main chain, and combine with the N atom in the amine and imine groups to form a pole and a dipole delocalized into the P bond of the entire molecular chain, thereby making the polyaniline exhibit higher conductivity. . This unique doping mechanism makes the doping and dedoping of polyaniline completely reversible. The doping degree is affected by factors such as pH value and potential, and it shows the corresponding change of appearance color. Polyaniline is therefore electrochemically active. And electrochromic properties.

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