Friction Reduction Behavior of Polyacrylic Acid Solutions Driven by Molecular Structure and Adsorption Stability

IF 3.3 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2025-09-08 DOI:10.1007/s11249-025-02066-0

Cheng Zheng, Jimin Xu, Haiyang Gu, Lin Sun, Juchen Zhang, Kun Liu, Tomoko Hirayama

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引用次数: 0

Abstract

In the context of low-viscosity aqueous lubrication, this study systematically investigates the lubrication mechanisms of polyacrylic acid (PAA) solutions. It combines experimental techniques with molecular dynamics simulations to elucidate the effects of concentration-dependent molecular structures and temperature-dependent adsorption stability. Results show that with increasing PAA concentration, the friction coefficient first decreases and then increases, with optimal lubrication observed at 0.2%. Higher concentrations lead to increased PAA adsorption, elevated acidity, and molecular aggregation, resulting in surface corrosion and intensified wear. At high temperatures, while adsorption energy remains stable, enhanced chain flexibility and entanglement raise viscosity, reduce film fluidity, and accelerate wear. These findings provide valuable insights for optimizing water-based lubrication systems using PAA additives.

Graphical Abstract

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分子结构和吸附稳定性驱动聚丙烯酸溶液的减摩行为

在低粘度水润滑的背景下，本研究系统地研究了聚丙烯酸（PAA）溶液的润滑机理。它将实验技术与分子动力学模拟相结合，阐明了浓度依赖的分子结构和温度依赖的吸附稳定性的影响。结果表明：随着PAA浓度的增加，摩擦系数先减小后增大，在0.2%时润滑效果最佳；较高的浓度会导致PAA吸附增加、酸度升高和分子聚集，从而导致表面腐蚀和磨损加剧。在高温下，在吸附能保持稳定的同时，增强的链柔韧性和缠结会提高粘度，降低膜的流动性，加速磨损。这些发现为优化使用PAA添加剂的水基润滑系统提供了有价值的见解。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.