Novel high performance lubricants for industrial and biomedical applications

适用于工业和生物医学应用的新型高性能润滑剂

• 批准号: RGPIN-2016-05438
• 负责人: Grecov, Dana
• 金额: $ 2.77万
• 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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=652386
• 关键词: Novel; performance; lubricants; industrial; biomedical

The development of a new generation of lubricants is of paramount technological and economic relevance as it is estimated that half of our energy consumption is dissipated as friction. ***Liquid Crystals (LCs) are anisotropic viscoelastic materials; the combination of fluid-like flow with crystal-like anisotropy makes its phases interesting as modifiers of interfacial behavior when applied as lubricants. The anisotropy of the viscosity coefficient, with respect to different flow directions, is a unique property of the liquid crystalline phase. The ability of liquid crystalline materials to form ordered boundary layers with good load-carrying capacity, and to lower the friction coefficients, wear rates and contact temperatures of sliding surfaces, thus contributing to increase the components service life and save energy has been widely demonstrated. ***Another method to improve significantly the properties of lubricants is the addition of nanoparticles. The ability of these additives 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. ***Although the performance and life of artificial synovial joints is generally good, lubrication remains a key factor because one of the main forms of their failure is due to loosening of the implant caused by wear particles. There is very little direct evidence for the role played by the composition of the healthy and diseased synovial fluid and the structure and properties of this biofluid. If we understood this we might be able to design better artificial joints and possibly even repair damaged, natural joints. Due to the bio-compatible nature of most lyotropic liquid crystalline materials, they have been considered as viable candidates to be used as bio-lubricants.***The main objective of this research program is the design, testing and optimization of a new generation of lubricants and bio-lubricants with ultra-low friction and reduced wear. The computational modeling and experiments will offer an efficient pathway to formulate novel lubricants which are economically viable. To improve lubrication efficiency and therefore reduce energy consumption we aim to develop a model of lubrication flow using liquid crystals or nanoparticles as additives that is experimentally validated and can be implemented into modern computational engineering and design tools. These tools will make it possible to design the next generation of sustainable high performance lubricants. **

新一代润滑剂的发展具有至关重要的技术和经济相关性，因为据估计，我们一半的能源消耗被消散为摩擦。 ***液晶（LCS）是各向异性粘弹性材料；当用作润滑剂时，将流体样流与晶体状各向异性的组合与界面的相结合使其相处变得有趣。 粘度系数的各向异性相对于不同的流动方向是液晶相的独特特性。液晶材料以良好的负载能力形成有序边界层的能力，并降低滑动表面的摩擦系数，磨损速率和接触温度，从而广泛证明有助于提高组件的使用寿命和储蓄能量。 ***显着改善润滑剂特性的另一种方法是添加纳米颗粒。这些添加剂能够以良好的负载能力形成有序边界层，并降低滑动表面的摩擦系数，磨损速率和接触温度。 ***尽管人工滑膜的性能和寿命通常是好的，但润滑仍然是一个关键因素，因为其失败的主要形式之一是由于磨损颗粒引起的植入物而造成的。直接证据表明，通过健康和患病的滑液的组成以及该生物流体的结构和特性所起的作用。如果我们理解这一点，我们也许可以设计更好的人造关节，甚至可以修复受损的自然关节。 由于大多数溶作液晶材料的生物兼容性质，因此被认为是可行的候选者，可用作生物润滑剂。***该研究计划的主要目标是设计，测试和优化新一代具有超低摩擦和磨损降低的润滑剂和生物润滑剂的组成。计算建模和实验将提供有效的途径来制定经济上可行的新型润滑剂。为了提高润滑效率并降低能源消耗，我们旨在使用液晶或纳米颗粒作为实验验证的添加剂开发润滑流量模型，并可以在现代的计算工程和设计工具中实施。这些工具将使设计下一代可持续的高性能润滑剂成为可能。 **