Synthesis and properties of PANI/SiO2 organic-inorganic hybrid films

► PANI/SiO2 hybrid films were prepared directly from polyaniline emulsion solution and tetraethyl orthosilicate. ► Hybrid films prepared have a homogeneous and smooth surface without detectable cracks. ► Low TEOS/ANI molar ratio is prone to obtain a smooth surface and exceptional corrosion protection properties. ► The increase of TEOS content tend to reduce corrosion resistance ability.