Controlling Friction and Adhesion Using Charged Hydrogel Lubricants During Manufacturing

在制造过程中使用带电水凝胶润滑剂控制摩擦和粘附

基本信息

批准号：
2121681
负责人：
Rosa Espinosa-Marzal
金额：
$ 42.61万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-08-01 至 2025-07-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2121681&HistoricalAwards=false
关键词：
Controlling Friction Adhesion Using Charged

项目摘要

This grant supports research that contributes new knowledge related to lubrication in manufacturing processes, promoting both the progress of science and advancing national prosperity. Oil-based lubricants generate pollutants and harmful contaminants and, thus, there is a demand for environmentally benign lubricants that are renewable and, at least, as efficient. While lubrication in an aqueous medium could solve this need, it is rarely applied in manufacturing due to the low pressure-coefficient of the viscosity of water, among other reasons. In biological tribosystems like cartilage, these challenges are met by employing gel-assisted aqueous lubrication. Thus inspired, this project designs synthetic waterborne films with charged hydrogel-like structures that enable the active control of friction and adhesion during manufacturing. Active control of hydrogel lubrication not only ensures good manufacturing practices in food, biomedical and pharmaceutical industries, low-carbon footprint and tunable lubrication of machine components, but also enables handling of soft biologically inspired materials and delicate electronic components during manufacturing. Furthermore, the knowledge derived from this research allows machine interfaces to dynamically adapt to their current task, which increases machine versatility, efficiency and product quality. Therefore, results from this research benefit the U.S. economy and society and help to extend U.S. manufacturing to new application areas. The multi-disciplinary approach helps broaden participation of women and underrepresented minority students in research and positively impacts engineering education.This research produces fundamental knowledge on active control of hydrogel-based lubrication via electrical modulation. In particular, the project determines how modulating the balance between physical interactions in three hydrogel systems, (1) electrostatic attraction vs. repulsion, (2) hydrogen bonding vs. electrostatic repulsion, and (3) hydrophobic attraction vs. electrostatic repulsion), dictates the self-assembly pathway and microstructure, and how this can be applied to modulate lubrication. These lubricants are synthesized via microphase separation. The experimental studies combine microscopy, oscillatory shear and normal and lateral force measurements with polymer physics-based models to deliver understanding of the role played by physical associations in the interfacial structure and rheology and how they influence friction and adhesion. This research also advances the knowledge about how chemical and electrical stimulation drives changes in friction and adhesion mechanisms. The new knowledge includes breakthroughs in discovery of hydrogel lubrication mechanisms enabled by the integration of novel and improved experimental and modeling toolsets, novel design rules for responsive hydrogels with control over the structure-property relationships, and a framework to predict the friction coefficient as a function of the operating conditions and hydrogel composition.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该赠款支持研究，这些研究有助于与制造过程中的润滑相关的新知识，促进了科学进步和促进民族繁荣。油基润滑剂会产生污染物和有害污染物，因此，需要对环境良性润滑剂的需求，这些润滑剂可再生，至少是高效的。尽管水培养基中的润滑可以解决这一需求，但由于水的粘度较低，因此很少将其用于制造中。在软骨等生物底层系统中，通过采用凝胶辅助水润滑来应对这些挑战。因此，该项目受到了启发，设计了具有带电的水凝胶样结构的合成水膜膜，从而使制造过程中的摩擦和粘附能够主动控制。积极控制水凝胶润滑的不仅可以确保食品，生物医学和制药行业的良好制造实践，低碳足迹和机器组件的可调润滑，还可以在制造过程中处理软生物学启发的材料和精致的电子组件。此外，从这项研究中得出的知识使机器界面可以动态适应其当前任务，从而提高了机器的多功能性，效率和产品质量。因此，这项研究的结果使美国经济和社会有益于将美国制造业扩展到新的应用领域。多学科的方法有助于扩大妇女和代表性不足的少数族裔学生参与研究的参与，并对工程教育产生积极影响。这项研究通过电气调节产生了基于基于水的润滑的积极控制的基本知识。特别是，该项目确定了如何调节三个水凝胶系统中物理相互作用之间的平衡，（1）静电吸引力与排斥，（2）氢键与静电排斥与静电排斥，以及（3）疏水吸引力与静电排斥），使自我组件途径和微观结构和微观结构以及如何使用该模型。这些润滑剂是通过微相分离合成的。实验研究结合了显微镜，振荡剪切以及正常和侧向力测量与基于聚合物物理学的模型，以了解物理关联在界面结构和流变学中所起的作用以及它们如何影响摩擦和粘附。这项研究还提高了有关化学和电刺激如何驱动摩擦和粘附机制变化的知识。新知识包括通过整合新颖和改进的实验和建模工具集来发现水凝胶润滑机制的突破，对响应式水凝胶的新型设计规则，对结构 - 特性关系的控制进行了新的设计规则，以及一个框架，一个框架，可以通过摩擦系数来预测运行条件和通过nsf的构成的功能，并通过nsf的基础进行了构成，并依靠NSF的依据。智力优点和更广泛的影响审查标准。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Insight into the assembly of lipid-hyaluronan complexes in osteoarthritic conditions

深入了解骨关节炎条件下脂质-透明质酸复合物的组装

DOI：
10.1116/6.0002502
发表时间：
2023
期刊：
Biointerphases
影响因子：
2.1
作者：
Sun, Kangdi;Shoaib, Tooba;Rutland, Mark W.;Beller, Joesph;Do, Changwoo;Espinosa-Marzal, Rosa M.
通讯作者：
Espinosa-Marzal, Rosa M.

Control of Surface Morphology, Adhesion and Friction of Colloidal Gels with Lamellar Surface Interactions