Wang Jing, Wu Bingyu, Dhyani Abhishek, Repetto Taylor, Gayle Andrew J, Cho Tae H, Dasgupta Neil P, Tuteja Anish
Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.
ACS Appl Mater Interfaces. 2022 May 18;14(19):22466-22475. doi: 10.1021/acsami.2c03408. Epub 2022 May 9.
Surfaces that are resistant to both liquid fouling and solid fouling are critical for many industrial and biomedical applications. However, surfaces developed to address these challenges thus far have been generally susceptible to mechanical damage. Herein, we report the design and fabrication of robust solid- and liquid-repellent elastomeric coatings that incorporate partially crosslinked lubricating chains within a durable polymer matrix. In particular, we fabricated partially crosslinked omniphobic polyurethane (omni-PU) coatings that can repel a broad range of liquid and solid foulants. The fabricated coatings are an order of magnitude more resistant to cyclic abrasion than current state-of-the-art slippery surfaces. Further through the integration of classic wetting and tribology models, we introduce a new material design parameter () for abrasion-resistant polymeric coatings. This combination of mechanical durability and broad antifouling properties enables the implication of such coatings to a wide variety of industrial and medical settings, including biocompatible implants, underwater vehicles, and antifouling robotics.
对液体污垢和固体污垢均具有抗性的表面对于许多工业和生物医学应用至关重要。然而，迄今为止开发的用于应对这些挑战的表面通常易受机械损伤。在此，我们报告了一种坚固的拒液和拒固弹性体涂层的设计与制备，该涂层在耐用的聚合物基体中包含部分交联的润滑链。特别是，我们制备了能排斥多种液体和固体污垢的部分交联全疏聚氨酯（omni-PU）涂层。所制备的涂层比当前最先进的光滑表面对循环磨损的抗性高一个数量级。通过进一步整合经典的润湿和摩擦学模型，我们为耐磨聚合物涂层引入了一个新的材料设计参数（）。这种机械耐久性和广泛的防污性能的结合使得此类涂层能够应用于各种各样的工业和医疗场景，包括生物相容性植入物、水下航行器和防污机器人。
