Advanced antifouling coatings that consisted of a lubricant gel immobilized on a polyelectrolyte film containing metastable silver ions was successfully fabricated. These films exhibited slipperiness that was unaffected by chemical and physical tests. Moreover, these films showed a high degree of slipperiness with respect to various liquids (hot water, ethanol, hexadecane, and oleic acid). However, the slipperiness of the films with respect to water was lower than that of a slippery liquid-infused porous surface. Such slippery liquid-immobilized coating films with high chemical and physical durabilities should find use in a wide range of applications that demand antifouling and waterproof properties under extreme conditions, such as those requiring high durability and organic solvent use. The immobilized lubricant gel was formed by dehydration condensation of Si−OH on the outer surface of the Layer by Layer (LbL) film and reaction between Si−H groups and NH<sub>2</sub> groups in the middle of the LbL film following oxidation−reduction reactions between Si−H groups and silver ions. This suggests that polyelectrolyte films containing silver ions and amine groups are extremely useful as reactive sites. Thus, polyelectrolytes with metal ions should be useful materials not only for sensors and antifouling coatings but also for catalyst membranes, filters, and electronic devices.<br/>References:

Slippery liquid-immobilized film with high thermal and chemical stability

255th National Meeting (2018)

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