Group 2
Methodology To Evaluate 3D Printable Conductive Polymers For Biomedical Applications
Team Members: Raneem Alhashbari, Sakinh Alotal, Andrea Brunton, Nathaniel Lazorchak
Sponsors: Brian Overshiner & Timothy Nisi, 3D Innovations Lab
Background
3D printable conductive filaments are a relatively new and untested material that can be used to print circuits
Different brands of conductive filaments must be tested to determine their efficacy for different applications
Manufacturing sensorized prostheses presents difficulties when inserting wiring into the prosthetic itself
Dual-extruder printers may be used to print sockets with integrated wiring, reducing both time and costs
User Needs
The project aims to create a way to evaluate the general abilities and provide methods of characterization for 3D printable conductive filaments for potential use by device manufacturers (especially clinics/hospitals with on-site device manufacturing) in order to reduce the barrier to entry of developing devices with 3D printed circuitry.
Point Of Care
The sensorized socket may be used as a diagnostic and design tool for prosthetists working with amputees. Sensors within the socket provide pressure data which may be used to improve upon the socket design.
Testing
Protocols
The following tests were designed to test any type of conductive filament for biomedical applications
Electrical Properties
Resistivity Tests
Direct Current Test
Connection Tests
Permanent Deformation
Permanent Epoxy
Temporary Conductive Paste
Permittivity Tests
Pulse Delay Method
Cole-Cole Impedance Fit
Parallel-Plate Capacitance
Mechanical/Physical Properties
Perspiration Test
Angle Test
Curvature Test
Four Point Bending Test
Cyclic Loading Test
Biocompatibility
Cytotoxicity Test
Irritation Test
Sensitization Test
Diagrams
CAD Model
Learn More
Please find more information about this project within the poster below.
Acknowledgments
We would like to thank our sponsors, Brian Overshiner and Timothy Nisi, and our instructors, Dr. Sharon Miller and Dr. Lester Smith, for their guidance and insight throughout this project. Special thanks to Sherry Clemens and Travis Kening.