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Home  > Raw materials & technologies  > Applications  > Protective & Marine coatings  > Tara tannin to serve as natural biocide

Thursday, 19 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Tara tannin to serve as natural biocide

Tuesday, 15 May 2012

In a new approach for alternative antifouling coatings, scientists explored the possible application of a natural and abundant product, such as tara tannin.

The undesirable accumulation of a wide variety of marine organisms on ship hulls can lead to significantly increased costs

Source: Eric Gevaert -  Fotolia.com
The undesirable accumulation of a wide variety of marine organisms on ship hulls can lead to significantly increased costs Source: Eric Gevaert -&...

The development of alternative antifouling coatings with new natural products as biocides inhibit is a key factor in the marine sector. In a new approach, tara tannin (TT) is being proposed as a promising solution. It is important to note that TT is obtained from the pods of the tree avoiding its cutting down. The aim of this research was, primarily, to explore the possible application of a natural and abundant product, such as TT, in the preparation of antifouling coatings. So, a TT derivative was obtained and characterised to be employed as the bioactive compound in antifouling coatings. Previous to the immersion in natural environments, the dissolution of TT from antifouling coating in artificial sea water was studied. TT was incorporated into the coating as zinc "tannate”. One of the tested coatings proved to be efficient in antifouling protection in natural sea water at Mar del Plata harbor during eight months. The addition of 2 % by weight of zinc oxide to the coating extended its service life until the year.

Read more about the new approach

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