New eco-friendly coating for boats based on shellfish waste

(06-07-2017) Researchers from the GREEN-CHEM network at Ghent University have developed an anti-fouling coating for boats based on recycled waste from shellfish.

Researchers from the GREEN-CHEM network at Ghent University have developed a new coating for boats based on the recycled waste from shellfish. The classic anti-fouling coatings battle the growth of mussels, sea cubes, algae and other sea creatures with toxic substances like heavy metals. However, this new coating is environmentally friendly. The eco-friendly coating will be immediately put to the test during a sailing trip around the world.



The protecting layer mainly consist of chitosan, a biological component made from the waste of shellfish, animals like lobsters, crabs, scampi’s and shrimp.

That substance naturally works as a protection from moulds and bacteria. It is now already used in agriculture, water purification, the food industry and cosmetic industry to suppress body odor and for medical applications.

Professor Chris Stevens from the faculty of Bio-science engineering at Ghent University and his team have modified the material in a way it got an extra protective function. It should now be able to keep mussels, sea cubes, algae and other sea creatures from growing on the hull of the sailing boat.

“To stop that kind of fouling, toxic substances are generally used. We accepted the challenge to do this in a more biological way without risk for the environment”, explains professor Stevens. “Besides, we have managed to convert food waste in to something useful, causing a very low ecological footprint of the product.”

Sailing trip around the world

The special coating can soon be tested in the water. It has been applied on the hull of the sailing boat of sailor Erik Kiekens, who is departing in the summer of 2017 on a sailing trip around the world under the name ‘Sailing Le Grand Bleu’.

During that trip, the chitosan-derivate will have to prove it is protective enough against the growth of mussels, sea cubes, moulds and bacteria.

Kiekens is an old-chemist himself and has been doing research on anti-fouling paints for many years. However, until now those contained toxic substances. And that is one of the reasons he is going to test the product from Ghent University, next to his own product, solely based on natural ingredients. Also with Hasselt University and the University of Leuven he has started a cooperation to use nanotechnology in this application.

International Green Chemistry Network

The coating from the researchers is a new step towards the kind of research Ghent University wants to aim for in the new global network of Green Chemistry, called GREEN-CHEM: towards small footprint solutions. The aim of the network is to design chemical products and processes to reduce the usage of dangerous substances or even make their use completely unnecessary.

This network combines the expertise of chemists from universities from all over the world: York (UK), Toulouse (France), São Paulo (Brazil), Maastricht (The Netherlands), Tennessee (US), Sichuan (China), Hong Kong (China), Karlsruhe (Germany) and Zürich (Switzerland). The coordination of the international network will happen in Ghent.

The goal of the network is to deliver education, research and services about sustainable & green chemistry to companies all over the world. With the central theme of how to apply green technology in production and design processes.

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