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    Improving the properties of antifouling hybrid composites: The use of Halloysites as nano-containers in epoxy coatings

    Year: 2021

    Journal: Colloid Surf. A-Physicochem. Eng. Asp., Volume 623, AUG 20

    Authors: Tonelli, Monica; Perini, Ilaria; Ridi, Francesca; Baglioni, Piero

    Organizations: H2020, InnovaConcrete Project [760858]; CSGI Consortium; MIUR-Italy

    Keywords: Marine fouling; Nano-composite; Ecofriendly antifouling actives; Sodium salicylate; N-(2; 4; 6-trichlorophenyl)maleimide

    Marine biofouling is an age-old problem with a broad impact in many marine activities. The development of environmentally friendly and long-term marine antifouling coatings remains a huge challenge in the maritime industry and involves many factors: hydrophobicity, surface roughness, electrostatic interactions, and the use of anti-adhesive/biocide molecules. We developed a novel antifouling epoxy paint doped with Halloysite clay nanotubes (HNTs) as nano-containers. HNTs were loaded with two eco-sustainable antifouling molecules, sodium salicylate and N-(2,4,6-trichlorophenyl)maleimide, which can dramatically reduce bacterial attachment. The dispersion procedure of the nano-carriers in the paint was optimized so that an efficient antifouling effect is reached with the incorporation of a small amount of loaded HNTs. The use of 10 wt% of loaded HNTs in paint drastically enhanced material antifouling properties by preventing the attachment of Vibrio natriegens marine bacteria, which promises wide applications for the protection of ships' hulls.
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