Biomass-Based Nanoengineered Cooling Geotextile for Permafrost Thawing Prevention.

Area of Science:

• Climate Science
• Materials Science
• Environmental Engineering

Background:

• Permafrost thawing is a critical climate tipping point with severe consequences.
• Conventional permafrost stabilization methods are energy-intensive, costly, and less effective in warming climates.
• Infrastructure on permafrost requires continuous heat removal due to increasing instability.

Purpose of the Study:

• To develop and demonstrate a sustainable, biomass-derived cooling geotextile for mitigating permafrost thawing.
• To provide an effective and scalable solution for permafrost stabilization.
• To create a low-carbon footprint alternative to existing cooling technologies.

Main Methods:

• Fabrication of a three-layer cooling geotextile using scalable nanoprocessing and roll-to-roll manufacturing.
• Design incorporates a woven biomass scaffold, nonwoven fiber network, and porous coating with micro/nanostructures.
• Assessment of thermal performance, albedo enhancement, durability, and environmental impact.

Main Results:

• The geotextile achieved significant soil cooling (up to 25 °C) and enhanced albedo (up to 96.3%).
• Demonstrated durability exceeding engineering standards for Arctic conditions (tensile strength 1,682 kg, tear strength 191 kg, puncture strength 61 kg).
• Simulations predict up to 12 °C surface cooling, potentially preventing 40,000 km² of permafrost thaw.

Conclusions:

• The biomass-derived cooling geotextile is a scalable, sustainable solution for permafrost stabilization.
• It offers effective heat extraction, albedo enhancement, and thermal barrier properties.
• This technology can reinforce Arctic coastlines, reconstruct landscapes, and restore the environment with a low carbon footprint (0.7 kg·m⁻²).