Anti-fouling coating compositions and methods for preventing the fouling of surfaces

摘要

A xerogel film exhibiting antifouling properties. The films are made using long-chain alkyltrialkoxysilanes, short-chain alkyltrialkoxysilanes, aminoalkyltrialkoxysilanes, alkylaminoalkyltrialkoxysilanes, dialkylaminoalkyltrialkoxysilanes, and perfluororalkyltrialkoxysilanes as sol-gel precursors. The films can be used as coatings on surfaces to reduce or eliminate fouling resulting from attachment and/or growth of biofoulants such as algae, diatoms, bacteria, barnacles, and biofilms.

主权项

1. A composition comprising a sol-gel matrix, wherein the sol-gel matrix is a sol-gel processed xerogel film formed from a sol-gel processed composition comprising:
a first component selected from 0.25 mole % to 5.0 mole % of a long-chain alkyltrialkoxysilane having a C10 to C25 alkyl group and three C1 to C3 alkoxy groups, 1 mole % to 45 mole % of a perfluoalkyltrialkoxysilane having a C8 to C25 perfluoroalkyl group and three C1 to C3 alkoxy groups, and 1 mole % to 20 mole % of an aminoalkyltrialkyoxysilane having a C1 to C10 aminoalkyl group and three C1 to C3 alkoxy groups, alkylaminoalkyltrialkoxysilane having a C1 to C10 alkylaminoalkyl group and a C1 to C10 aminoalkyl group, and three C1 to C3 alkoxy groups, or dialkylaminoalkyltrialkoxysilane having a C1 to C10 dialkylaminoalkyl group, two alkylamino groups that are, independently, C1 to C10 alkyl groups, and three C1 to C3 alkoxy groups, a second component that is 20 mole % to 55 mole % of a shorter-chain alkyltrialkoxysilane having a C3 to C8 alkyl group and three C1 to C3 alkyl groups, or if the first component is an aminoalkyltrialkyoxysilane, alkylaminoalkyltrialkoxysilane, or dialkylaminoalkyltrialkoxysilane, 1 mole % to 45 mole % of a long-chain alkyltrialkoxysilane having a C10 to C25 alkyl group and three C1 to C3 alkyl groups, and a third component that is a tetraalkoxysilane having C1 to C3 alkyl groups making up the remainder of the composition.