PHOTOPOLYMERIZABLE "ROUNDUP" SYNTHESIS, HERBICIDAL ACTIVITY AND COATING FORMULATION
Abstract (Summary)Marine biofouling is a worldwide problem for all seagoing vessels. It causes a roughness of a ship's hull, a decrease in its speed and maneuverability and thereby increasing fuel consumption and emission of waste products into the atmosphere. As long as 2000 years ago, people attempted to prevent biofouling by covering ship’s hulls with copper and lead sheets. Since then a large variety of methods have been tried but none proved ideal. The current research project tests incorporation a glyphosate-based biocide into a model marine coating to prevent the formation of biofilms- one of the first steps in marine fouling and thereby block biofouling process. This work describes a synthetic route for a novel compound - acrylated glyphosate - and characterization by chemical, analytical and physical methods. Polymerization, photopolymerization and copolymerization experiments proved the novel compound efficiently polymerizes and copolymerizes during reasonably short time intervals (120sec-10 min). Biological assays based on the Kirby-Bauer test and monitoring of growth inhibition showed that the acrylated glyphosate derivative, as well as its polymer, possess strong herbicidal activity against model and common biofouling organisms. Incorporation of acrylated glyphosate into model acrylic resin yielded a highly cross-linked coating which proved to be toxic toward the microorganisms. Release experiments showed no leaching of copolymerized acrylated glyphosate from the coating over 21 days. This indicates that the compound, incorporated into the backbone structure of the iv coating, retains herbicidal activity against common fouling organisms. Therefore, acrylated glyphosate is a promising component for antifouling coatings for seagoing vessels.
School Location:USA - Ohio
Source Type:Master's Thesis
Date of Publication:01/01/2006