PreprintCited by 1Additive Manufacturing and 3D Printing TechnologiesInnovations in Concrete and Construction MaterialsAdditive Manufacturing Materials and Processes

Towards Lunar In-Situ Resource Utilization and In-Space Manufacturing: Additive Manufacturing of Hydrogel-Based Lunar Regolith Pastes

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Rahman, Md Habibor, Hayes, Anna, Muralidharan, Krishna, Loy, Douglas A., Shafae, Mohammed·2023·SSRN Electronic Journal

Abstract

This work proposes a new material formulation utilizing lunar regolith simulants (LHS-1), water, and a hydrogel-forming polymer (Pluronic F127) to produce a hydrogel-based lunar regolith paste suitable for material extrusion Additive Manufacturing (AM). The formulation enables using water as a potential lunar in-situ resource for the first time in literature, considering the recent confirmation of large quantities of water-ice in the shadowed craters around lunar poles and water presence on the Moon's sunlit surface. To systematically investigate the viability of the proposed material feedstock, along with the application of material extrusion AM, this work introduces a three-stage design of experiment (DOE) framework to achieve two fundamental objectives. First, the viable range of lunar regolith simulant in the hydrogel-based material formulation is identified using a categorical quality evaluation of single and multi-layer material depositions. Second, the material's printability window is established in terms of printing speed and extrusion rate for different viable material compositions. This was done using hierarchically designed experiments to evaluate the material in terms of extrudability (i.e., material extrusion consistency in single-layer prints) and buildability as a function of dimensional accuracy and inter-layer fusion of sintered multi-layer builds. Then, the printability of the material beyond simple geometry test specimens was demonstrated by producing several prototype hand tools and lab-scale construction blocks with varying geometrical complexities. Unlike current works using trial-and-error based methods to investigate the viability of other lunar regolith-based materials, the introduced DOE driven framework offers a pathway towards systematically identifying the optimal material compositions and the corresponding process parameters to enable high-quality prints.

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Crossref · 10.2139/ssrn.4354354

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6 of 6 references verified0 citation errors · 0 not checkable

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Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Challenges arise due to the low melting point of sulfur, which can cause sulfur concrete structures to melt during Lunar days, limiting its applicability in Lunar conditions.

    “However, challenges arise due to the low melting point of sulfur, which can cause sulfur concrete structures to melt during Lunar days, limiting its applicability in Lunar conditions [250,252-254].”
  • Even at low concentrations, hydrogel polymers can interact with water, forming a network of hydrogen bonds and altering viscosity and viscoelastic properties of the mixture.

    “Even at low concentrations of hydrogel, these polymers can interact with water, forming a network of hydrogen bonds and altering the viscosity and viscoelastic properties of the mixture.”
  • A notable concern arises due to the excessive use of DCM, a neurotoxic substance that can vaporize during the mixing process, emitting hazardous outgas that pose a threat in enclosed spaces.

    “However, a notable concern arises due to the excessive use of DCM, a neurotoxic substance that can vaporize during the mixing process, emitting hazardous outgas that pose a threat in enclosed spaces [253].”
  • Hydrophilic hydrogel-forming polymers can address challenges of solvent for material extrusion.

    “As illustrated by Rahman et al. in their study, hydrophilic hydrogel-forming polymers can address these challenges [253].”

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Authors
Rahman, M. H., Hayes, A., Muralidharan, K., Loy, D. A., & Shafae, M.
Affiliations
University of Arizona (US)
Corresponding author
Shafae, Mohammed
Venue
SSRN Electronic Journal
Publisher
Elsevier BV
Published
2023
ISSN
1556-5068 (ISSN-L)
OpenAlex
W4320488725
Cited by
1
References
6
Citations by year
2024: 1
Type
posted content
Language
en
Open access
Locations
SSRN Electronic Journal (acceptedVersion)
Topics
  • Physical Sciences › Engineering › Automotive Engineering › Additive Manufacturing and 3D Printing Technologies
  • Physical Sciences › Engineering › Building and Construction › Innovations in Concrete and Construction Materials
  • Physical Sciences › Engineering › Mechanical Engineering › Additive Manufacturing Materials and Processes
Keywords
lunar in-situ resource utilization, space manufacturing, lunar regolith simulant, Pluronic F127, extrusion-based additive manufacturing, lunar water ice, printability, extrudability, constructability, dimensional accuracy, experimental design, hand tools

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