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Friday, 20 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Lower toxic paints show promising antifouling properties

Friday, 17 January 2014

Biodegradable polymer based paints, containing substance triggering microfouling, have been developed by a team of French researchers.

Environmentally friendly antifoulings for ships are in high demand

Source: Sven Rohweder/Pixelio

Environmentally friendly antifoulings for ships are in high demand

Source: Sven Rohweder/Pixelio

The development of new antifouling coatings with respect to the marine environment is actually crucial. The aim of this work was to concept an erodible paint formulated with biodegradable polyester as binders and which combines two modes of prevention: chemical and physical repelling of biofouling.

New system is lower toxic than traditional biocidal paints

The system is principally dedicated to disturb durable settlement of microfouling. Each component was chosen according to its specific properties: chlorhexidine is a bisdiguanide antiseptic with antibacterial activity, zinc peroxide is an inorganic precursor of high instable entities which react with seawater to create hydrogen peroxide, Tween 85 is a non ionic surfactant disturbing interactions between colonizing organisms and surface. Obtained results highlighted the interest on mixing such molecules to obtain a promising coating with lower toxicity than traditional systems.

The study is published in: Progress in Organic Coatings, Volume 77, Issue 2, February 2014, Pages 485-493

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