Lawrence Livermore (LLNL) scientists have developed a new class of materials for their revolutionary volumetric 3D printing method.
Called Thiol-ene Resins, these new materials when combined with LLNL’s Volumetric Additive Manufacturing (VAM) techniques, offer objects that are tough, strong, stretchable and flexible.
VAM includes Computed Axial Lithography (CAL), which produces objects by projecting beams of 3D patterned light into a vial of resin.
The vial spins as the light cures the liquid resin into a solid at the desired points in the volume, and the uncured resin is drained, leaving the 3D object behind in a matter of seconds.
The scientists led by principal investigator and LLNL engineer Maxim Shusteff have also demonstrated the first example of a method for designing the 3D energy dose delivered into the resin to predict and measure it, successfully printing 3D structures in the thiol‐ene resin through tomographic VAM.
This demonstration is significant, because it creates a common reference for controlled 3D fabrication and for comparing resin systems.
Moreover, by studying how the resin behaves at different light dosages, the scientists are hoping to improve the agreement between computational models and experiments, and apply photochemical behavior to the computed tomography reconstructions.
Their end goal is to produce high‐performance polymers for applications as diverse as adhesives, electronics and biomaterials.
Image and content: Maxim Shusteff/LLNL