Halloysite aluminosilicate nanotubes with a 15 nm lumen, 50 nm external diameter, and length 900 nm have been developed as entrapment system for loading, storage, and controlled release of protective agents (microcracks healing, anticorrosion and biocide protection). Halloysite was used as an additive in plastics to produce responsive coating, and it is an environmentally friendly and biocompatible nanomaterial. A self-healing approach has been developed for repair mechanisms through response activation to external impacts for halloysite/epoxy composites (for extreme deepwater conditions).  By self-assembly of nanoshells over the nanotubes, and formation of smart caps at the tube ends it is possible to develop a wide range of release rates. The anticorrosive performance of the polymeric paint loaded with 3-5 % of halloysite entrapped benzotriazole and dodecylamine was tested on iron, copper, and aluminum alloy by direct exposure of the metal plates to corrosive media, and improved protection of up to 12 months.

Nanocontainer composite coating for responsive anticorrosion protection

243rd National Meeting (2012)

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