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Experimental Characterization of Multifunctional Shape Memory Polymers With Carbon-Based Nanofillers

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This paper focuses on the fabrication and characterization of shape memory polymer (SMP) with interspersed carbon-based nanofillers which showed significant improvements in quasi-static and dynamic mechanical properties. These composite shape memory polymers have been fabricated using a specialized acetone solvent mixing technique to achieve high dispersion. The effect of individual…

This paper focuses on the fabrication and characterization of shape memory polymer (SMP) with interspersed carbon-based nanofillers which showed significant improvements in quasi-static and dynamic mechanical properties. These composite shape memory polymers have been fabricated using a specialized acetone solvent mixing technique to achieve high dispersion. The effect of individual and hybrid additions of graphene oxide (GO) and carbon nanotubes (CNT) with a total nanofiller content of 2 wt.% was investigated. These high dispersion SMPs showed significant improvements in tensile moduli (up to 25% over baseline), tensile strength (up to 15% over baseline), and strain to failure (up to 75% over baseline), owing to crack propagation hindrance induced by the carbon nanofillers. Further, dynamic mechanical analysis (DMA) showed a minimal reduction in polymer chain mobility and improvements in storage modulus. Dispersion is characterized by micrograph acquisition and subsequent binary image processing.

ContributorsRoman, Jose (Author, Co-author) / Chattopadhyay, Aditi (Thesis director) / Venkatesan, Karthik (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / Mechanical and Aerospace Engineering Program (Contributor)

Created2022-05

Experimental Characterization of CMCs for Data-Driven Microstructure Assessment

Description

This paper focuses on the sample preparation and material characterization of a carbon fiber-reinforced silicon carbonitride (C/SiNC) ceramic matrix composite (CMC) system. C/SiNC CMC systems have desirable mechanical and thermal properties which makes them suitable for a wide variety of applications ranging from aerospace to power generation. CMCs are highly…

This paper focuses on the sample preparation and material characterization of a carbon fiber-reinforced silicon carbonitride (C/SiNC) ceramic matrix composite (CMC) system. C/SiNC CMC systems have desirable mechanical and thermal properties which makes them suitable for a wide variety of applications ranging from aerospace to power generation. CMCs are highly susceptible to manufacturing-induced defects, and the effect of these defects on the microscale damage behavior of the microstructure of these CMCs has not been researched. In order to perform the material characterization study, samples of the C/SiNC CMC system had to be prepared through a meticulous polishing process. After the samples were prepared, micrographs of the intratow region of the samples were captured using a confocal microscope. Feature extraction were subsequently performed on the micrographs that were captured. Different image processing techniques were applied to the captured micrographs to quantify the features that were identified.

ContributorsRanade, Rayva (Author) / Chattopadhyay, Aditi (Thesis director) / Khafagy, Khaled (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor) / Materials Science and Engineering Program (Contributor)

Created2022-05