塔里木大学学报2025，Vol.37Issue(2)：67-75,9.DOI:10.3969/j.issn.1009-0568.2025.02.008
棉纤维素与聚乙烯滑动摩擦过程分子动力学分析
Molecular dynamics analysis of the sliding friction process between cotton cellulose and polyethylene
摘要
Abstract
Friction between cotton fibre and polyethylene is common phenomenon during cotton harvesting and processing,as well as textile manufacturing.This friction can lead to wear and tear of mechanical parts.To prolong the longevity of machines and equipment,it is crucial to conduct a thorough investigation into their friction and wear mechanisms.In this paper,the effects of sliding velocity and load on the frictional wear between crystalline cotton cellulose and polyethylene are systematically investigated from an atomic point of view by means of molecular dynamics methods.Due to the effect of sliding traction,the bond lengths and bond angles of the polyethylene molecular chains deviate from their equilibrium positions.This causes an increase in the bond energy and angle energy,leading to plastic deformation as the polyethylene molecular chain diffuses and migrates along the sliding direction.As the sliding velocity increases,the diffusive migration and plastic deformation of the polyethylene molecular chains increase,resulting in the greater wear.The increasing load not only results in the higher friction force,but also leads to a more compact molecular arrangement on the friction surface,further resulting in a decrease in the coefficient of friction.The influence of load on the diffusive migration and wear rate of polyethylene molecular chains is insignificant under the dual factors.Compared to the load,the effect of sliding speed on the frictional wear between crystalline cellulose and polyethylene is more significant.These results support the theoretical study on the friction and wear mechanisms between cotton fibre and polyethylene and provide a reference for damage protection of polyethylene.关键词
棉纤维素/聚乙烯/分子动力学/滑动速度/载荷/摩擦磨损Key words
cotton cellulose/polyethylene/molecular dynamics/sliding velocity/load/frictional wear分类
轻工业引用本文复制引用
方文娟,姜开翔,耿刘源,凡鹏伟,张有强..棉纤维素与聚乙烯滑动摩擦过程分子动力学分析[J].塔里木大学学报,2025,37(2):67-75,9.基金项目
国家自然科学基金地区科学基金项目(12262034) （12262034）
