Eric Waswick
Research Mentor(s): Dandan Zhang
Mentor Department: Materials Science and Engineering
Authors: Eric Waswick, Dandan Zhang, Alan Taub
Session: Session 7 (4:00pm – 4: 50pm)
Presentation Type: Poster 22
Abstract
To enhance the energy efficiency of vehicles and reduce their carbon footprints, carbon negative materials are gaining attention in manufacturing companies. Natural fibers, known for their lightweight, cost-effectiveness, and environmental sustainability, present a promising alternative to synthetic materials. This study focuses on improving the mechanical properties of flax fibers through treatment with various supercritical fluids. Flax fibers with diameters ranging between ~22-50 µm are treated with supercritical CO2, Ar, and N2, both with and without the addition of 5 nm TiO2 nanoparticles. The treatments are conducted at approximately 28MPa and 60°C, with real time monitoring to track fiber behavior during processing. Post-treatment analyses include tensile strength and modulus tests, weight measurements, and evaluation through optical microscopy and imaging. The results reflected that treatment with supercritical CO2 significantly increased fiber modulus, and the addition of TiO2 nanoparticles further enhanced this effect. Microscopy shows that non-load bearing fibers and weak, pectin rich materials are removed during treatment, leaving behind stronger fiber components. Additionally, EDS confirms that only a very small amount of TiO2 nanoparticles remain on the surface of the fiber, while the absence of nanoparticle penetration indicates recyclability. This work provides insights into the mechanisms of fiber enhancement through supercritical fluid treatment, exposing its potential for sustainable material development.
