Microwave absorption and fast-response self-lubricating coating based on the PAO6@SiO2@Ppy microcapsules

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-09-22 DOI:10.1016/j.triboint.2025.111229

Yanliang Shen , Chen Zhao , Xingwei Wang , Qiangliang Yu , Feng Zhou

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Abstract

A dual-shelled microcapsule with PAO6 core encapsulated by silica and Ppy layers was synthesized via an emulsion-templated sol–gel method combined with in situ chemical oxidative polymerization. The microcapsules had a mean diameter of roughly 30 micrometers and an encapsulation efficiency of 80 %. Owing to the hollow architecture of the microcapsules and polarization effects, the microcapsule-paraffin composites achieved a optimal reflection loss reaching −27.8 dB with an effective absorption bandwidth up to 7.4 GHz. Uniform dispersion of microcapsules within the coating matrix resulted in a multifunctional composite coating exhibiting both microwave absorption and rapid self-lubrication response. Self-lubricating coating exhibited a minimal friction factor of approximately 0.05 and negligible wear volume, with nearly instantaneous response during repeated start-stop experiments. The oil-encapsulated dual-shell structure microcapsules demonstrate significant potential in developing multifunctional coatings.

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基于PAO6@SiO2@Ppy微胶囊的微波吸收快速响应自润滑涂层

采用乳液模板法制备溶胶-凝胶法结合原位化学氧化聚合法制备了以二氧化硅和聚吡啶层包封PAO6为核心的双壳微胶囊。微胶囊的平均直径约为30微米，包封效率为80% %。由于微胶囊的中空结构和极化效应，微胶囊-石蜡复合材料的最佳反射损失达到−27.8 dB，有效吸收带宽高达7.4 GHz。微胶囊在涂层基体内均匀分散，形成具有微波吸收和快速自润滑特性的多功能复合涂层。自润滑涂层表现出最小的摩擦系数约为0.05，磨损体积可以忽略不计，在重复的启停实验中几乎是瞬时响应。油包双壳结构微胶囊在开发多功能涂料方面具有重要的潜力。

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 International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.