Interpenetration and Lubrication of Responsive Polydisperse Brushes: Theory and Simulations

响应性多分散刷的互穿和润滑：理论与模拟

• 批准号: 429613790
• 负责人: Professorin Dr. Friederike Schmid
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/429613790?language=en
• 关键词: Interpenetration; Lubrication; Responsive; Polydisperse; Brushes

Polymer brushes are commonly used for permanent surface modification to mediate the stability of colloidal dispersions, provide anti-fouling properties and protect the system from degradation. Brush-like structures in combination with the synovial fluid provide very low friction in mammalian joints and have important applications as lubricants in machine parts and in artificial hip and knee joints. Brushes can also act as smart stimuli-responsive materials that change surface properties reversibly or act as sensors. Here we propose to use brushes formed by adsorption-active chains to control the compressional and lubricating properties of brush-modified surfaces in response to changing the temperature and/or solvent composition. Polydispersity is an inherent property of real polymer systems, which is normally fixed by the synthesis/preparation techniques, and brush properties are affected by it. We will demonstrate that it can be reversibly modified, together with the effective grafting density by varying the monomer-surface affinity, through a microphase segregation mechanism.

聚合物刷通常用于永久性表面改性，以调节胶体分散体的稳定性，提供防污性能并保护系统免受降解。与滑液组合的刷状结构在哺乳动物关节中提供非常低的摩擦，并且在机器部件和人工髋关节和膝关节中作为润滑剂具有重要的应用。刷子还可以作为智能刺激响应材料，可逆地改变表面特性或作为传感器。在这里，我们建议使用由吸附活性链形成的刷子来控制刷子改性表面的压缩和润滑性能，以响应于改变温度和/或溶剂组合物。 多分散性是真实的聚合物体系的固有性质，通常由合成/制备技术固定，并且刷性能受其影响。我们将证明它可以通过改变单体表面亲和力，通过微相分离机制可逆地改性，以及有效接枝密度。