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Friday, 20 September 2019
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Raw materials & technologies, Applications

Antistatic and anticorrosive properties of polyaniline composite coating

Wednesday, 25 July 2018

In a recently published paper scientists synthesised polyaniline composite coating with antistatic and anticorrosive properties.

The composite coating synthesised in a new study showed good anticorrosion properties. Source: v74 – stock.adobe.com.

The composite coating synthesised in a new study showed good anticorrosion properties. Source: v74 – stock.adobe.com.

In a new paper, acrylic ester grafting epoxy (A-g-EP) with COOH functional groups was firstly designed and prepared. Then the PANI-A-g-EP composite was obtained through oxidation polymerisation of aniline on A-g-EP macromolecular chains. PANI nanoparticles in the PANI-A-g-EP composite were dispersed uniformly due to the strong interactions between macromolecular carboxyl groups and PANI. The composite is characterised by FT-IR, UV–vis and cyclic voltammetry (CV). The effect of PANI content on the glass transition temperature (Tg) and the thermal decomposition temperature (Td) were studied.

Good wet adhesion

PANI-A-g-EP composite coating was fabricated by the solution casting. The results of surface resistance, anticorrosion performances of the composite coating demonstrate that the good anticorrosion property of A-g-EP coating is caused by the good wet adhesion. The anticorrosion mechanism of PANI in the PANI-A-g-EP composite coating is revealed to be the electron transmission and passivation catalysis.

The study is published in: Progress in Organic Coatings Volume 122, September 2018, Pages 270-279.

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