Lunar Regolith Composites with Carbon Nanotubes for Space Habitation Applications

As exemplified by the objectives of programs like Artemis, the next generation of space exploration will be characterized by the addition of habitation. This habitation must be facilitated by the utilization of novel materials. Material consideration includes the ability to be locally sourced and fabricated on the Moon, as well as the need for advanced mechanical properties to withstand the environmental challenges. Lunar regolith is a highly favorable candidate for habitat materials due to its ability to form a concrete-like material and is locally sourced. Thermal insulation and durability aspects of lunar regolith composites are still underdeveloped related to construction material. Using experimental investigations, the objective of this proposal is to further enhance the mechanical properties of lunar regolith through the implementation of carbon nanotubes (CNTs) while reinforcing the composite with architectured pyrolytic carbon lattice scaffolds. These additives attempt to improve the structural properties and insulation properties while also allowing for a low payload burden. In my previous work, the addition of CNTs at weight percentages of 0.25%, 0.50% and 1%, have been shown to improve the compressive strength of the composite. We will expand on my previous study by implementing a lattice structure to target the strength improvement and to further expand testing strategies. The goal of these tests will include examining the effects that the lunar environmental conditions will have on the composite. Testing will be explored at different composite sizes, e.g., at the current 3 cm × 3 cm cylindrical size, a smaller scale, and a larger scale to determine repeatability and scalability. After the material is further developed, the 3D printing ability will be examined. If these strategies prove successful in providing enhanced mechanical properties and the fabrication approach is successfully demonstrated, it will provide an approach for Advanced Habitation Systems.

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