About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
3D Printing of Biomaterials and Devices
|
| Presentation Title |
Structural and mechanical property characterization of 3D-printed anisotropic PEGDA hydrogel vintile lattices for tissue-mimicking phantom applications |
| Author(s) |
Daniel Yoon, Margrethe Ruding, Kevin N. Eckstein, Ruth J. Okamoto, Philip V. Bayly |
| On-Site Speaker (Planned) |
Daniel Yoon |
| Abstract Scope |
3D-printed structures of complex geometries are shown to be excellent tissue mimicking phantoms, capable of replicating organic anisotropic tissue properties and behavior such as skeletal muscle and brain tissue. This work shows a simple design, development, and mechanical analysis of 3D-printed polyethylene diacrylate (PEGDA) hydrogel vintile lattices to fabricate structures with consistent anisotropic and shear properties. The lattices are 3D-printed using stereolithography at different unit cell size, unit cell scaling, and strut diameter. Mechanical characterization is performed to assess the mechanical properties. Uniaxial compression measures Young’s modulus, E, and dynamic shear testing measures the apparent complex shear modulus, Gapp. The results provide insight into the lattice’s ability to exhibit anisotropic properties with good shear wave behavior. Hence, the vintile lattice can be functionally tailored to mimic organic anisotropic tissue properties to serve as a diagnostic tool for evaluating existing shear wave elastography methods by comparing estimated and measured mechanical properties. |