Preparation and performance of PANI-PVA composite film doped with HCl

The polyaniline (PANI)-poly (vinyl alcohol) (PVA) composite film doped with HCl was prepared by adopting PVA as matrix. Effects of PVA content and film drying temperature on properties of HCl-PANI-PVA composite film were studied. A comparison was made for tensile strength, elasticity, conductivity and thermal stability of PVA, HCl-PANI or HCl-PANI-PVA. PVA film presented the highest tensile strength and elasticity (150.8 MPa and 300.0%), but its conductivity was the lowest. The conductivity of HCl-PANI-PVA was the highest (1500 S m −1 ), and tensile strength and elasticity of HCl-PANI-PVA were higher than those of HCl-PANI. The order of their thermal stability is PVA > HCl-PANI > HCl-PANI-PVA before 260°C, and the order of their thermal stability is HCl-PANI > HCl-PANI-PVA > PVA after 260°C. At the same time, the structure and conductive mechanism of composite materials were characterised and analysed through infrared and scanning electron microscopy (SEM).