ISS BioFabrication Facility Improved Through 3D Printed Ceramics
3D printed ceramic fluid manifolds are enabling advancements in bioprinting at the International Space Station. The Ceramic materials provided better biocompatibility than printed polymers resulting in larger viable structures. The additive manufactured ceramics have been in service since November 2019.
A spacecraft arrived at the International Space Station (ISS) on November 2, 2019 with supplies for the 3D BioFabrication Facility (BFF). Besides human cells and bioinks for BFF, also being tested during this mission are new components of Techshot’s tissue conditioning system that were manufactured by Lithoz America. The latest round of microgravity bioprinting in December yielded larger biological constructs than the first BFF attempts in July.
Specializing in additive manufacturing systems for advanced ceramics, the Troy, New York company partnered with Techshot to develop ceramic fluid manifolds used inside bioreactors, which provide nutrients to living materials printed in space by BFF. Expected to replace the prototype polymer manifolds tested in space this summer, the Lithoz ceramic manifolds are being tested aboard the ISS for their biocompatibility, precision, durability and overall fluid flow properties. The ceramic manifolds were printed using lithography-based ceramic manufacturing (LCM) on a high resolution printer.
Techshot and Lithoz engineers and scientists worked together to optimize the design and the manufacturing processes required to make it. “It’s been an absolute pleasure working with Lithoz,” said Techshot Senior Scientist Dr. Carlos Chang. “Their expertise in ceramic processing really made these parts happen.” “The success of ceramic additive manufacturing depends on working together with design, materials, and printing,” said Lithoz Vice President Shawn Allan. “Design for Ceramic Additive Manufacturing principles were used along with print parameter control to achieve Techshot’s complex fluid-handling design with the confidence needed to use the components on ISS.”
The work highlighted an ideal use case for ceramic additive manufacturing to enable production of a special compact device that could not be produced without additive manufacturing, while enabling a level of bio-compatibility not achievable with printable polymers. Techshot engineers were able to interface the larger bio-structures with the printed ceramic manifolds. Next steps will focus on optimized integration of these components and longer culturing of the printed biological materials.
Conditioned human tissues from this mission are expected to return to Earth in early 2020 for evaluation.