SBIR Phase II: Scratch and Abrasion Resistant Superhydrophobic Polymer Coatings

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This Small Business Innovation Research (SBIR) Phase II project will leverage the advances wemade in fabricating flexible polymer surfaces that shed water at low tilt angles while remainingsuperhydrophobic after abrasion. In Phase I we developed a model which correlated surfacemorphology with mechanical robustness. In Phase II we will apply this model to thedevelopment of a processes compatible with high speed, large-scale fabrication techniques.The roofing industry seeks material that is self-cleaning, anti-fouling and is highly resistant toweather events over time. A durable, superhydrophobic polymeric roof membrane will meetthis market need. Commercial success depends on (1) qualifying production speeds up to 100feet/min, (2) proving compliance to current product requirements and (3) showing value-add.Phase II studies will elucidate the mechanisms that contribute to the stability of the surfaceswhen exposed to UV light, allowing us to improve weatherability. Having demonstrated theself-cleaning properties of our polymer surfaces in Phase I, we will focus on anti-foulingproperties in Phase II (i.e. low bacterial adhesion and reduced algae growth.)The broader impact of this SBIR Phase II project will be twofold. Foremost, a direct impact willbe revenue and job growth in the US manufacturing sector. Secondarily, the technology willsupport federal policy goals on energy and the environment. Approximately $40 billion is spentannually in the US to air condition buildings. DOE funded studies show that in warm climates,substituting a cool roof for a conventional roof can reduce carbon emissions which driveclimate change. Cool roofs also relieve strain on the electrical grid by reducing peak powerdemand. Widespread use of cool roofs can improve air quality, hence human health, byslowing the formation of smog. Superhydrophobic polymer membranes fabricated usingtechnology developed in this proposal will help keep roofs clean and better able to reflect heat.Furthermore, coating of outdoor infrastructure equipment, such as wind turbine blades and offshoreenergy exploration platforms, will enable the safe operation of such facilities during icingconditions due to the ability of the superhydrophobic surface to prevent ice accretion. Fieldtests are underway. Food handling equipment will benefit from reduced adhesion of bacteria to surfaces, thus improving food safety.