Lunar Soil Fiber: ‘Steel Rebar’ for Future Moon Bases
Chinese scientists have achieved a breakthrough in lunar resource utilization by successfully producing continuous fibers from real lunar soil, a development that could transform how future moon bases are built. A sample of the fiber has been sent to China’s Tiangong space station aboard a Tianzhou cargo spacecraft to undergo long-term exposure testing in the harsh environment of space.
From Lunar Soil to Construction Material
The research, led by Academician Zhu Meifang of the Chinese Academy of Sciences at Donghua University’s State Key Laboratory of Advanced Fiber Materials, demonstrates that lunar soil can be processed into a reinforcing material analogous to steel rebar for concrete on Earth. The team has been working on extreme environment materials since 2016, according to People’s Daily.
After China’s Chang’e-5 mission successfully returned 1,731 grams of lunar soil samples from the Moon in December 2020, the team used just 0.5 grams of real lunar soil—a basaltic material that had undergone billions of years of space weathering—to produce a continuous fiber approximately 3 meters long, with a diameter comparable to a human hair (10-50 micrometers).
“The theory is not complicated: heat the lunar soil to a molten state, form droplets, and then draw them into fibers,” explained Cheng Yanhua, a researcher at Donghua University. However, she noted the immense challenge: “Drawing fibers in such an environment is like blowing sugar figures in a vacuum—very difficult to achieve with conventional methods.”
Engineering for the Lunar Environment
The manufacturing process involves melting lunar soil at 1400-1500°C and using vacuum traction technology to draw fibers. The team designed the world’s first lunar-environment-simulating spinning device, which operates under vacuum and microgravity conditions—replicating the Moon’s unique environment on Earth.
The fiber, designated CE5 C1000, has a tensile strength of approximately 1 GPa with a material loss rate of less than 10%. The team achieved three notable firsts: the first use of solar energy via DC electrical characteristics to prepare simulated lunar soil fibers, the first international achievement of fiber drawing in a vacuum environment, and the first automated lunar soil fiber forming operation.
From Laboratory to Space Station
The lunar soil fiber sample was launched to China’s space station around May 11, 2026, where it will be mounted on an extravehicular exposure platform. There, it will face the full brunt of space conditions—high vacuum, intense radiation, and extreme temperature fluctuations—to gather critical performance data.
Currently, the technology remains in the basic verification stage. The space station experiment represents a crucial step toward proving the fiber’s durability in real space conditions. Results are expected to inform future production methods.
In April 2025, the lunar soil fiber was publicly displayed at the National Museum of China as part of the “Nine Days to Capture the Moon—20 Years of China’s Lunar Exploration Program” exhibition. The following September, the fully independent intellectual property technology won the China International Industry Fair (CIIF) Grand Prize.
Implications for Lunar Base Construction
Earth-to-Moon transportation costs are estimated at approximately $500,000 to $1 million per kilogram, making the use of local materials essential for sustainable lunar development. “Future lunar research station construction must learn to use local materials,” a team member told People’s Daily. “These lunar soil fibers could potentially be used to ‘set up tents on the spot’ on the Moon.”
The fibers could be woven into flexible structural materials or used to reinforce lunar concrete, serving as the “steel reinforcement” for moon base construction. This breakthrough complements other Chinese in-situ resource utilization (ISRU) research, including lunar soil bricks tested on the space station’s exterior and 3D printing with simulated lunar regolith.
Broader Context and Next Steps
China’s lunar ambitions are accelerating. The successful Chang’e-5 and Chang’e-6 missions, combined with the International Lunar Research Station (ILRS) roadmap—a joint China-Russia initiative that has attracted over 17 countries—signal Beijing’s intent to establish a permanent lunar presence by the 2030s.
Academician Zhu Meifang’s team is already developing a next-generation lunar fiber-forming device that will achieve automated, continuous production of lunar soil fibers in vacuum and microgravity environments. The team is also exploring how to scale the process from laboratory quantities to the industrial levels required for construction.
Key questions remain: How will the fiber perform after extended space exposure? Can production be scaled from 0.5 grams to tons? What is the optimal fiber-to-concrete ratio for lunar construction? The space station experiment, expected to yield results by 2027, will begin answering these questions.
As China and its international partners push toward a permanent lunar presence, turning Moon dust into building materials may prove to be one of the most critical technologies for making that vision a reality.