| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
Improving Composite Tailorability Through Architected Nacre Tablets |
| Author(s) |
Alexander Kepreos, Syed Fahad Hassan, Oleksii Karpenko, Mahmoodul Haq |
| On-Site Speaker (Planned) |
Alexander Kepreos |
| Abstract Scope |
Nacre, a biological composite material derived from mollusk shells, exhib-its exceptional mechanical properties surpassing those of its constituent phases due to its unique microstructure. It resembles a hierarchical brick-and-mortar structure, wherein approximately 95% of the volume fraction is occupied by brittle aragonite platelets, while the remaining 5% comprises a polymeric matrix of proteins and polysaccharides. Despite the minor volu-metric contribution of this matrix to the overall composite structure, the re-sulting material exhibits a fracture toughness that surpasses that of pure aragonite by a factor of 3 to 9. Graphene nanoplatelets (GnPs) can be em-ployed to create nacre-like structures due to their unique properties and ability to be oriented in a controlled manner. Numerous studies document-ed in the literature have sought to emulate Nacre's hierarchical architecture by subjecting graphene nanoplatelets to electric field-induced alignment. Furthermore, computational models have been developed to predict the re-sultant platelet spacing within such composites as a function of material parameters and applied voltage. In this study, a top-down approach was adopted to demonstrate that the spacing between the graphene platelets within a matrix can be used as a critical design parameter capable of influ-encing and optimizing the overall material properties of the composite. To achieve that, an existing computational model was modified to specify GnP separation as an input. An experimental approach was adopted to determine the requisite voltage and processing time using this desired separation. The preliminary data supports the feasibility of this approach for producing op-timal results. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |