elettrically conductive polymers for additive manufacturing · 2021. 1. 26. · electrically...
TRANSCRIPT
Electrically conductive polymers for additive manufacturing
Current research @ DISAT - PoliTo
Speaker: Valentina Bertana, PhDDepartment of Applied Science and Technology (DISAT)
Chilab - Materials and Microsystems Laboratory
21st January 2021
About the Lab
Design and fabrication of micro-devices
Fundamental & applied research
Tech. transfer Education
• Inkjet printing• FDM printer• 3D plastic sintering• Micro stereolithography (commercial)• Micro stereolithography (custom)
Valentina Bertana3D Printing Electronics Conference
About the Lab
• Inkjet printing• FDM printer• 3D plastic sintering• Micro stereolithography (commercial)• Micro stereolithography (custom)
Valentina Bertana3D Printing Electronics Conference
Electrically conductive polymers for 3D printing
“A lab-on-chip is not simply a network of microchannels. It also includes functions dependingon the application such as pumps, valves, sensors, electronics”
Abgrall, P.; Gué, A.-M. Lab-on-chip technologies: making a microfluidic network and coupling it into a complete microsystem—a review. J. Micromechanics Microengineering 2007, 17
Design and fabrication of micro-devices
Valentina Bertana3D Printing Electronics Conference
JUST PRINTED
LOW IRRADIATION TIME
HIGH IRRADIATION TIME
Composition
- PEGDA- AgNO3- Photo initiators- Dye
Silver nanoparticles from precursor
POLYMERIZATION + SILVER NP GENERATION inside the same SL printer
Valentina Bertana3D Printing Electronics Conference
Silver nanoparticles from precursor
POLYMERIZATION + Ag NPs GENERATION inside the same SL printer
Polymerization Ag NPs generation
Valentina Bertana3D Printing Electronics Conference
Pattern cross-section
Under SUbmiSSion
Resistance in the order of few MΩ
WHY?
PEDOT (wt %)
0 5 10 15 25 35 45
s (S
/cm
)
1e-8
1e-7
1e-6
1e-5
1e-4
1e-3
1e-2
1e-1
1e+0
Composition
- PEGDA- PEDOT:PSS- Photo initiator
σ =0.05 S/cmPrintable
σ =0.07 S/cmNot printable
PEDOT:PSS from water solution
Valentina Bertana3D Printing Electronics Conference
PEGDA
PEGDA:PEDOT
PEDOT:PSS from water solution
1 2 3
Proof of concept
Find the right printing parameters Applications
Valentina Bertana3D Printing Electronics Conference
PEDOT:PSS from water solution
3 Applications
2/3 terminal device for biosensing
Valentina Bertana3D Printing Electronics Conference
Industrial and research projects
Valentina Bertana3D Printing Electronics Conference
PLACONFlexible PCB for automotive application
