Enhancing UHMWPE tribology via mussel-inspired PDA coatings

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-06-09 DOI:10.1016/j.matlet.2025.138905

Xinqi Zou, Zhenghao Ge, Chaobao Wang, Yuyang Xi

引用次数: 0

Abstract

Ultra-high molecular weight polyethylene (UHMWPE) exhibits excellent wear resistance but suffers from unstable tribological performance under high loads and complex environments due to its chemically inert and low-energy surface. A mussel-inspired strategy was developed to construct PDA coatings on UHMWPE via dopamine self-polymerization under alkaline conditions. By precisely controlling deposition time, dense and uniform PDA films with enhanced adhesion to inert polymer surfaces were achieved. Friction tests demonstrated a 62.5 % reduction in the coefficient of friction with 32 h PDA coatings compared to unmodified UHMWPE. Molecular dynamics simulations confirmed the ordered self-assembly of PDA through π–π stacking and hydrogen bonding at the interface. This coupling-agent-free method provides a scalable, energy-efficient approach for enhancing polymer lubrication in high-load mechanical systems.

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通过贻贝启发的PDA涂层增强超高分子量聚乙烯的摩擦学性能

超高分子量聚乙烯（UHMWPE）具有优异的耐磨性，但由于其化学惰性和低能量表面，在高载荷和复杂环境下的摩擦学性能不稳定。以贻贝为灵感，在碱性条件下通过多巴胺自聚合在UHMWPE上构建PDA涂层。通过精确控制沉积时间，获得了致密均匀的PDA薄膜，增强了与惰性聚合物表面的附着力。摩擦试验表明，与未改性的超高分子量聚乙烯相比，使用32 h PDA涂层的摩擦系数降低了62.5%。分子动力学模拟证实了PDA通过π -π叠加和界面氢键的有序自组装。这种无偶联剂的方法为提高高负荷机械系统中的聚合物润滑提供了一种可扩展的、节能的方法。

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

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive