Abstract
ABSTRACTThe polyaniline–polyvinyl alcohol (PANI–PVA) composite conductive coatings were prepared by using PVA as the base material and doping with hydrochloride (HCl), dodecylbenzene sulfonic acid (DBSA), and aminosulfonic acid (NH2SO3H) aqueous solution. The influences of mass ratio between PANI and PVA, acid content, oxidant (ammonium persulfate, APS) content, reaction time, and drying temperature of film on the conductivity of coating film were studied. The result shows that in case the mass percentage of PVA is 40% and the drying temperature of film is 80℃, the conductivity of coating film has the highest conductivity. In case C(HC1) is 0.5 mol⋅L−1, the reaction time is 6 h, and n(APS/An) is 1.0, the maximum conductivity of HCl–PANI–PVA coating film is 1500 S⋅m−1; in case C(DBSA) is 1.0 mol⋅L−1, the reaction time is 8 h, and the n(APS/An) is 2.0, the maximum conductivity of DBSA–PANI–PVA coating film is 710 S⋅m−1; in case C(NH2SO3H) is 1.0 mol⋅L−1, the reaction time is 6 h, and the n(APS/An) is 2.0, the maximum conductivity of NH2SO3H–PANI–PVA coating film is 200 S⋅m−1. Among these PANI–PVA composite conductive coatings, the conductivity of HCl–PANI–PVA coating film is the highest. At the same time, the structure and conductive mechanism of composite materials were characterized and analyzed through infrared and ultraviolet spectrum and scanning electron microscopy.
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