Novel applications of nanoparticle dispersions in lubrication and bio-lubrication

纳米颗粒分散体在润滑和生物润滑中的新应用

• 批准号: RGPIN-2022-04650
• 负责人: Grecov, Dana
• 金额: $ 2.33万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760180
• 关键词: Novel; applications; nanoparticle; dispersions; lubrication

A considerable amount of energy is consumed to overcome friction, and major economic losses are due to wear of products and components and their replacement. The development of a new generation of lubricants is of paramount technological and economic relevance since it is estimated that one-fifth of the world's energy resources in present use are needed to overcome friction in one form or another. Hence, any reduction in friction and wear can result in considerable energy savings. It is also desirable to use eco-friendly lubricants as alternatives to the oil-based ones without compromising on the lubrication performance. Water-based nanolubricants have been emerging as promising eco-friendly lubricants by dispersing nano-additives into water. Water is environmentally friendly, inexpensive, readily available, and non-flammable and has high thermal conductivity. With the development of nanolubricating technology and the deepening understanding of functional nanomaterials, nanoparticles used as additives show unique physical and chemical properties and have a broad application prospect in lubrication. The use of water-based nanolubricants not only provides protection against friction and wear, but also improves overall the quality of the product, demonstrating a great potential in engineering applications, such as metal forming. The focus of this research program will be on the study of water-based lubricants with nano-additives, exhibiting liquid crystalline state in their phase diagram. Liquid crystals (LCs) are anisotropic materials with properties of both conventional liquid and solid crystals. The ability of LCs to form ordered boundary layers with good load-carrying capacity, and to lower the friction coefficients, wear rates and contact temperatures of sliding surfaces has been demonstrated. External electric and magnetic fields affect the orientation of liquid crystal molecules. The usage of electric or magnetic field to control lubrication properties is the first step towards designing smart lubricants, with many industrial and biomedical applications. This research program will lead to advanced, predictive tools to improve the nanolubrication mechanism understanding, and long term to propose new, economically viable, more efficient high performance environmentally friendly smart nanolubricants. This research program addresses fundamental questions underlying the water-based lubricants added by nanoparticles and their self-assembly, combining modelling, computation and experimentation to study the lubrication performance and the mechanism leading to that performance.

克服摩擦消耗了相当多的能量，主要的经济损失是由于产品和部件的磨损及其更换。新一代润滑剂的开发具有重要的技术和经济意义，因为据估计，目前使用的世界能源的五分之一需要以这种或那种形式克服摩擦。因此，摩擦和磨损的任何减少都可以节省大量的能量。还希望使用环保润滑剂作为油基润滑剂的替代品，而不损害润滑性能。水基纳米润滑剂是将纳米添加剂分散于水中而形成的新型环保润滑剂。水是环境友好的、廉价的、容易获得的、不易燃的并且具有高导热性。随着纳米润滑技术的发展和对纳米功能材料认识的不断深入，纳米粒子作为润滑添加剂表现出独特的物理和化学性能，在润滑领域具有广阔的应用前景。水基纳米润滑剂的使用不仅提供了对摩擦和磨损的保护，而且还提高了产品的整体质量，在金属成形等工程应用中展示了巨大的潜力。该研究计划的重点将是研究含有纳米添加剂的水基润滑剂，在其相图中显示液晶状态。液晶是一种各向异性材料，具有传统液晶和固体晶体的性质。LC形成具有良好承载能力的有序边界层的能力，以及降低滑动表面的摩擦系数、磨损率和接触温度的能力已被证明。外部电场和磁场影响液晶分子的取向。利用电场或磁场来控制润滑性能是设计智能润滑剂的第一步，具有许多工业和生物医学应用。这项研究计划将导致先进的预测工具，以提高纳米润滑机制的理解，并长期提出新的，经济可行的，更有效的高性能环保智能纳米润滑剂。该研究计划解决了纳米颗粒添加的水基润滑剂及其自组装的基本问题，结合建模，计算和实验来研究润滑性能和导致该性能的机制。