ENDURANCE: Graphene based coatings for durable wear resistance low cost position sensors

耐久性：基于石墨烯的涂层，用于耐用耐磨的低成本位置传感器

• 批准号: EP/P510208/1
• 负责人: Kwang-Leong Choy
• 金额: $ 6.29万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP510208%2F1
• 关键词: ENDURANCE; Graphene; based; coatings; durable

Developed by Prof. Choy, Aerosol Assisted Ion Deposition (AAID) is a novel, non-vacuum, cost effective and eco-friendly method for the non-line-of-sight deposition of both thin and thick coatings to 3D structure (non-conformal substrates) with control of structure and composition at the nanoscale. The fabrication of uniform graphene based nano-composite coatings, involves formulation of chemical precursors, which can be a solution or a suspension, and atomisation of the precursor to generate a finely charged aerosol. This allows control of the dynamics of droplets and their evaporation to form droplets consisting of polymeric ions, leading to the deposition of polymeric films incorporating with graphene based nanomaterials to form nanocomposite coatings with uniform and well-controlled structures in an open atmosphere. Within the ENDURANCE project we will apply this technique for the development graphene based nanocomposite coatings on potentiometer wiper heads targeting excellent conductivity between 1 and 300 ohm/square and wear resistance. Key challenges to be addressed in our research include: (1) Graphene interfaces: Limited knowledge of wear properties for graphene to graphene material contacts - we will explore the relationships between graphene coating formulation, chemical / physical properties and the wear properties at graphene to graphene interfaces; (2) Coating stability: Achieving complete polymerisation during cure thereby enabling long term coating stability - we will explore the relationships between graphene ink formulation and cure properties enabling optimisation of rapid and stable cure; (3) Coating surfaces: Ensuring graphene is concentrated at the coating surface to enable the surface properties to be realized- we will assess the feasibility to utilise electrostatic (repulsion) and formulation density to promote surface aggregation of graphene; (4) Coating adhesion: Graphene traditionally has poor adhesion to material surfaces thereby limited coating wear stability - we will explore coating formulations, substrate surface treatments and layer thickness to improve adhesion and wear performance; and (5) Conductivity: High conductivity requires excellent connectivity between graphene layers which may be difficult to achieve - we will explore the addition of both conductive additives and surface treatments to promote coating conductivity. Our research approach will follow three key phases (tasks): Task 1. Formulation Screening: nano-composite ingredients will be screened (graphene, nano-tubes, surfactants, binders, cross linkers, solvents, lubricants etc...) using standard formulations to understand relationships between formulation, AAID processing, and coating properties and performance (adhesion, conduction, wear and cure) Task 2. Coating formulation: different coating formulations will be investigated to achieve the target properties within the constraints of the material and processing requirements. A limited number of systems will be selected for further study. Task 3. First generation ink development: selected coating formulations will undergo a number of development cycles to optimise consistency, reliability, wear, rheology, cure etc. Substrate chemical (etching) & physical surface modification strategies will be considered to improve coating adhesion. A tribometer test rig will be used to assess wear and coating adhesion. We will also support investigation of graphene to graphene interface wear properties using statistical analysis methods (performance analysis) and analysis of wear samples to understand the wear mechanisms.

气溶胶辅助离子沉积（AAID）是一种新颖、非真空、经济、环保的方法，可在纳米尺度上控制结构和成分，在3D结构（非共形衬底）上非视距沉积薄涂层和厚涂层。均匀的石墨烯基纳米复合材料涂层的制造涉及化学前体的配制，其可以是溶液或悬浮液，以及前体的雾化以产生精细带电的气溶胶。这允许控制液滴的动力学和它们的蒸发以形成由聚合物离子组成的液滴，导致与石墨烯基纳米材料结合的聚合物膜的沉积，以在开放气氛中形成具有均匀且良好控制的结构的纳米复合材料涂层。在ENDURANCE项目中，我们将应用该技术在电位计雨刮器头上开发石墨烯基纳米复合材料涂层，目标是在1至300欧姆/平方之间实现优异的导电性和耐磨性。在我们的研究中要解决的关键挑战包括：（1）石墨烯界面：对石墨烯与石墨烯材料接触的磨损性能的有限了解-我们将探索石墨烯涂层配方，化学/物理性能和石墨烯与石墨烯界面处的磨损性能之间的关系;（2）涂层稳定性：在固化过程中实现完全聚合，从而实现长期涂层稳定性-我们将探索石墨烯油墨配方和固化性能之间的关系，从而实现快速和稳定固化的优化;（3）涂层表面：确保石墨烯集中在涂层表面，以实现表面特性-我们将评估利用静电（4）涂层附着力：石墨烯传统上对材料表面的粘附性差，从而限制了涂层的磨损稳定性-我们将探索涂层配方，（5）导电性：高导电性要求石墨烯层之间具有优异的连接性，这可能难以实现-我们将探索添加导电添加剂和表面处理以提高涂层导电性。我们的研究方法将遵循三个关键阶段（任务）：任务1。制剂筛选：纳米复合材料成分将被筛选（石墨烯、纳米管、表面活性剂、粘合剂、交联剂、溶剂、润滑剂等...）使用标准配方，了解配方、AAID工艺和涂层特性及性能（附着力、导电性、耐磨性和固化）之间的关系。涂层配方：将研究不同的涂料配方，以在材料和加工要求的限制内实现目标性能。将选择数量有限的系统进行进一步研究。任务3.第一代油墨开发：选定的涂料配方将经过一系列的开发周期，以优化一致性、可靠性、耐磨性、流变性、固化等。将考虑基材化学（蚀刻）和物理表面改性策略，以提高涂层附着力。将使用摩擦计试验装置评估磨损和涂层附着力。我们还将支持使用统计分析方法（性能分析）和磨损样品分析来研究石墨烯与石墨烯界面的磨损特性，以了解磨损机制。

项目成果

Negative permittivity derived from inductive characteristic in the percolating Cu/EP metacomposites

渗流 Cu/EP 复合材料中的感应特性衍生的负介电常数

• DOI: 10.1016/j.jmst.2019.07.015
• 发表时间: 2019
• 期刊: Journal of Materials Science & Technology
• 影响因子: 10.9
• 作者: Sun Kai;Xin Jiahao;Li Yaping;Wang Zhongyang;Hou Qing;Li Xiaofeng;Wu Xinfeng;Fan Runhua;Choy Kwang Leong
• 通讯作者: Choy Kwang Leong

The importance of particle dispersion in electrical treeing and breakdown in nano-filled epoxy resin

• DOI: 10.1016/j.ijepes.2021.106838
• 发表时间: 2021-02-11
• 期刊: INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
• 影响因子: 5.2
• 作者: Chen, Siyuan;Rowland, Simon;Clancy, Adam J.
• 通讯作者: Clancy, Adam J.