Characterization and tribological performance of new epoxy coatings modified with sustainable ionic liquid-graphene nanolubricants

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-10-01 DOI:10.1016/j.porgcoat.2024.108841

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Abstract

Graphene-based nanolubricants were prepared using the environmentally friendly 2-hydroxyethylammonium lactate (ML) ionic liquid. The Graphene-ML dispersion (MLG) and neat ML were added to Epoxy Resin (ER) in 5 and 10 wt% proportions to study the effect on the curing conditions by means of Differential Scanning Calorimetry (DSC) and oscillatory rheology. A nucleating effect was found for Graphene, while ML presented a plasticizing effect. These findings were confirmed by DSC and Dynamic-Mechanical Analysis (DMA) with a decrease on the mechanical properties and glass transition temperature. ML and MLG were evaluated as external lubricants of epoxy coatings, finding outstanding friction and wear prevention ability. One and two layer ER coatings were deposited on AISI 1015 steel disks. When used as internal lubricant, MLG is able to prevent surface damage on bi-layer ER coatings. Therefore, we provide a novel approach for the preparation of ER composites with environmentally friendly nanolubricants for applications under demanding conditions.

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用可持续离子液体-石墨烯纳米润滑剂改性的新型环氧涂层的特性和摩擦学性能

使用环保型 2- 羟乙基乳酸铵（ML）离子液体制备了石墨烯基纳米润滑剂。将石墨烯-ML 分散液（MLG）和纯 ML 以 5 和 10 wt% 的比例添加到环氧树脂（ER）中，通过差示扫描量热仪（DSC）和振荡流变学研究其对固化条件的影响。结果发现，石墨烯具有成核效应，而 ML 具有塑化效应。差示扫描量热仪（DSC）和动态力学分析（DMA）证实了这些发现，机械性能和玻璃化转变温度均有所下降。将 ML 和 MLG 作为环氧涂层的外部润滑剂进行了评估，发现它们具有出色的摩擦和防磨损能力。在 AISI 1015 钢盘上沉积了一层和两层 ER 涂层。当用作内部润滑剂时，MLG 能够防止双层 ER 涂层的表面损伤。因此，我们提供了一种制备ER复合材料与环境友好型纳米润滑剂的新方法，可用于苛刻条件下的应用。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.