嫦娥六号月壤为什么这么黏？我国科研人员找到答案

Core Insights - The research team from the Institute of Geology and Geophysics of the Chinese Academy of Sciences has revealed the physical mechanism behind the high viscosity characteristics of lunar soil samples from the Chang'e 6 mission, addressing the scientific question of why the lunar soil is "so sticky" [1] Group 1: Research Findings - The Chang'e 6 lunar soil exhibits a significantly higher repose angle compared to samples from the lunar front, indicating its flow characteristics are more similar to viscous soil on Earth [1] - The increase in repose angle is primarily controlled by three inter-particle forces: friction, van der Waals forces, and electrostatic forces, with friction being positively correlated with particle surface roughness [2] - A critical "particle size threshold" was identified, where the influence of van der Waals and electrostatic forces becomes significant when the D60 value is below approximately 100 micrometers, leading to noticeable viscous characteristics in non-clay mineral particles [2] Group 2: Implications and Applications - The unique characteristics of the Chang'e 6 lunar soil, including its finer particle size (D60 value of 48.4 micrometers) and complex morphology, enhance the contributions of friction, van der Waals, and electrostatic forces, resulting in a higher repose angle and increased viscosity [3] - This research provides a systematic explanation of the unique cohesive behavior of lunar soil from a particle mechanics perspective, offering important scientific foundations for future lunar exploration missions [3] - The findings will support the construction of lunar bases and the development of lunar resources, contributing to advancements in lunar scientific research and resource utilization [3]