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Sunday, 15 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Studying a new class of polymers for use in antifouling coatings

Tuesday, 5 May 2015

Amphiphilic surfaces, having both hydrophobic and hydrophilic properties, have been considered for marine antifouling and fouling release applications, as they may provide an environmentally friendly non-biocidal alternative for surface coating.

Researchers report a new class of polymers modified with amphiphilic side chains constructed from non-natural oligopeptides. Source: Wolfilser

Researchers report a new class of polymers modified with amphiphilic side chains constructed from non-natural oligopeptides. Source: Wolfilser

A team of international researchers report a new class of polymers modified with amphiphilic side chains constructed from non-natural oligopeptides. These non-natural amino acids have a diverse array of functionalities and polarities that can be arranged in any sequence to optimise antifouling and fouling release behaviour. Because of advances in solid state peptide synthesis, these peptides can be prepared on a multiple gram scale in a short period of time.

Testing the release performance against spores

Different sequences of non-natural amino acids were synthesised to determine the effect on the physical and antifouling properties of the surface. These oligopeptide sequences were attached to a PS-b-P(DMS-stat-MVS) diblock copolymer using thiol-ene "click” chemistry. The modified polymers were spray coated onto treated glass slides and characterised using water bubble contact angle measurements and near-edge X-ray absorption fine structure. The coatings were tested for antifouling and fouling release performance against spores and sporelings (young plants), respectively, of the green seaweed (alga) Ulva linza and also for non-specific protein absorption.

The study is published in: Polymers for Advanced Technologies.

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