武汉大学Longjian Xue团队取得一项新突破。他们受鱼皮启发开发出双面水凝胶涂层以减少阻力。相关论文于2023年12月26日发表在《中国化学》上。

在这项研究中，研究人员受骨鱼(Osteichthyes)鱼类皮肤的启发，通过室温下两步紫外线照射成功制备了一种双面水凝胶涂层(JHC)。JHC 的底面(STH)达到了103.3±17.5 kPa的剪切粘接强度，可以牢固地粘接各种表面，包括金属、陶瓷和聚合物。JHC 的上面(SLH)复制了摆线鳞的结构，而水凝胶的性质模仿了鱼皮上的粘液。SLH具有突出的机械、抗膨胀、防污和减阻性能。JHC的设计策略在管道运输、生物工程和航运业等众多领域具有潜在的应用前景。

据了解，在自然界中，鱼类已经进化出具有有效水动力性能和防污功能的皮肤，便于捕食和逃离捕食者。尽管已经探索了大量受鱼鳞启发的结构表面，但在结构表面上结合粘液在很大程度上被忽视了。

附：英文原文

Title: Fish Skin-inspired Janus Hydrogel Coating for Drag Reduction

Author: Yurong Zhang, Lijun Li, Ruteng Wang, Junwei Liu, Zhen Lin, Gang Li, Hongtao Liu, Yifeng Lei, Yunhe Xiong, Yan Zhao, Longjian Xue

Issue&Volume: 2023-12-26

Abstract: In nature, fishes have evolved functional skins with effective hydrodynamic performance and anti-fouling, facilitating predation and escaping from predators. Although a large number of fish scale-inspired structured surfaces have been explored, the incorporation of mucus on the structured surfaces has been largely ignored. Inspired by the skin of Osteichthyes fishes, a Janus hydrogel coating (JHC) is successfully prepared by a two-step UV light irradiation at room temperature. The bottom side of JHC (STH) achieves a shear adhesive strength of 103.3 ±17.5 kPa and can strongly adhere to a large variety of surfaces, including metals, ceramic and polymers. The top surface of JHC (SLH) replicates the structure of cycloid scales, while the nature of hydrogel mimics the mucus on fish skin. SLH possesses prominent mechanical, anti-swelling, anti-fouling and drag reduction properties. The design strategy for JHC has potential applications in numerous fields, like, pipeline transportation, bioengineering, and shipping industry.

DOI: 10.1002/cjoc.202300678

Source: https://onlinelibrary.wiley.com/doi/10.1002/cjoc.202300678