Characterization of the Photothermal Response in Nanocomposite Silica Aerogel Materials with Thin Metal Films
This research explores nanocomposite Silica Aerogels (SA) with tailored photothermal properties for solar vapor generation (SVG). Using magnetron sputtering, Copper (Cu) films were deposited on SA monoliths, creating nanocomposites with thicknesses of 20 nm, 50 nm, and 100 nm. Aerogels' low density and excellent insulation make them ideal for photothermal applications.
Characterization using SEM and spectrophotometry revealed significant UV scattering, high visible transmittance, and enhanced solar absorption, correlating with increased Cu film thickness. Thermal imaging and a Xenon arc lamp solar simulator were used to assess the photothermal response over a 26-minute cycle. Results showed that adjusting the sputtered film's thickness and composition finely tunes the photothermal response, enhancing solar absorption and heat retention.
These findings demonstrate the potential of magnetron sputtering for creating efficient photothermal materials, advancing solar-driven water desalination, purification, and energy harvesting technologies.
Functionalized Graphene Tire Tread Rubber Composition to Lower Sub-micron Microplastic Particle Emissions
This study investigates the potential of functionalized graphene nanoplatelets (COOH-GNP) to enhance tire tread rubber, aiming to reduce microplastic emissions from tire wear. Graphene, known for its exceptional mechanical properties, was incorporated into rubber formulations to improve wear resistance.
Using standardized rubber milling techniques, both unfunctionalized and functionalized GNPs were integrated into rubber matrices. The functionalized GNPs exhibited better dispersion and bonding within the rubber, leading to significant improvements in abrasion resistance. Testing showed that rubber composites with functionalized GNPs reduced mass loss by up to 43.94% compared to the standard reference compound (SRC).
Additionally, the study found that higher concentrations of GNPs significantly reduced sub-micron particulate emissions, demonstrating the potential for minimizing environmental impact. These findings support the use of graphene in developing more durable and environmentally friendly tires.
SEM images of SRC2 particles at a) 100x, b) 500x, and c) 3500x magnification
Graphene Coating Project
Our lab, in partnership with Stema Punch & Die and Cured Carbon Inc., is developing graphene-polymer composite coatings to enhance erosion protection for rotary-wing aircraft blades. These coatings use graphene's properties to withstand harsh environments like rain, sand, and ice, offering superior durability over conventional solutions.
Supported by the Department of National Defense IDEaS program, the project aims to demonstrate the coatings in simulated environments, paving the way for real-world trials and commercialization. These coatings also have potential applications in other industries to prevent erosion and icing on critical components.
