Concordia University engineers produced a composite from simulated lunar regolith and recycled polyether ketone ketone (PEKK), then 3D-printed a wrench and sacrificial test structures. The regolith reduced shrinkage and warping during heat treatment, while PEKK recovered from previously used sacrificial structures remained suitable for reuse. [1]
The result supports a closed-loop manufacturing model in which local mineral feedstock is combined with recoverable high-performance polymer. However, the composite developed greater internal porosity than unmixed PEKK, making it more brittle; this creates a reliability risk for pressure-critical, load-bearing, or life-support components. [1]
The Ark team should prioritize testing regolith-PEKK formulations under lunar vacuum, thermal cycling, radiation, abrasion, and mechanical fatigue. Establish a qualification database for tools by failure consequence, develop porosity-reduction and nondestructive-inspection methods, and design polymer-recovery systems that convert worn parts and sacrificial prints into new feedstock.