Mr. Eric M. Burgeson Profile

Eric M. Burgeson

at Oak Ridge National Lab

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Proceedings Article | 1 April 2019 Paper

Enhanced piezoresistive sensing of fiber-reinforced composites via embedded nanoparticles

Christopher Bowland, Eric Burgeson, Amit Naskar

Proceedings Volume 10971, 109711A (2019) https://doi.org/10.1117/12.2514256

KEYWORDS: Composites, Nanoparticles, Epoxies, Carbon, Structural health monitoring, Resistance, Coating, Nanomaterials, Fiber coatings

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Carbon fiber composites offer outstanding structural performance with high specific strength and are experiencing significant commercial adoption as the fiber price continues to decrease. Composite research efforts now need to focus on creating multifunctional composites, which can offer sensing capabilities in addition to structural attributes. This work focuses on creating multifunctional carbon fiber composites with structural health monitoring capabilities through the integration of piezoresistive nanoparticles on the surface of carbon fiber. Prior research introduced the development of coating silicon carbide nanoparticles on the surface of carbon fiber in a continuous feed-through process to achieve increased SHM sensitivity with enhanced interlaminar strength and tunable mechanical damping properties. One benefit of that coating process is the compatibility with various nanomaterials. This research capitalizes on that benefit by coating different nanoparticles, such as titanium dioxide, on carbon fiber to further enhance the sensing capabilities. A modification to the prior coating process is made in this research to enable significantly higher nanoparticle loading to be achieved. The resulting composites more accurately measure an applied force by responding with a more profound electrical resistance change. This research lays the foundation for efficiently integrating nanoparticles onto fibers leading to homogenously dispersed nanoparticles throughout a fiber reinforced composite for multifunctional performance.

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