Brzozowska Agata M, Parra-Velandia Fernando J, Quintana Robert, Xiaoying Zhu, Lee Serina S C, Chin-Sing Lim, Jańczewski Dominik, Teo Serena L-M, Vancso Julius G
Institute of Materials Research and Engineering, Agency for Science, Technology and Research , 3 Research Link, 117602 Singapore.
Langmuir. 2014 Aug 5;30(30):9165-75. doi: 10.1021/la502006s. Epub 2014 Jul 24.
When synthetic materials are submerged in marine environments, dissolved matter and marine organisms attach to their surfaces by a process known as marine fouling. This phenomenon may lead to diminished material performance with detrimental consequences. Bioinspired surface patterning and chemical surface modifications present promising approaches to the design of novel functional surfaces that can prevent biofouling phenomena. In this study, we report the synergistic effects of surface patterns, inspired by the marine decapod crab Myomenippe hardwickii in combination with chemical surface modifications toward suppressing marine fouling. M. hardwickii is known to maintain a relatively clean carapace although the species occurs in biofouling communities of tropical shallow subtidal coastal waters. Following the surface analysis of selected specimens, we designed hierarchical surface microtopographies that replicate the critical features observed on the crustacean surface. The micropatterned surfaces were modified with zwitterionic polymer brushes or with layer-by-layer deposited polyelectrolyte multilayers to enhance their antifouling and/or fouling-release potential. Chemically modified and unmodified micropatterned surfaces were subjected to extensive fouling tests, including laboratory assays against barnacle settlement and algae adhesion, and field static immersion tests. The results show a statistically significant reduction in settlement on the micropatterned surfaces as well as a synergistic effect when the microtopographies are combined with grafted polymer chains.
当合成材料被浸没在海洋环境中时，溶解物质和海洋生物会通过一种称为海洋污损的过程附着在其表面。这种现象可能导致材料性能下降，产生有害后果。受生物启发的表面图案化和化学表面改性为设计能够防止生物污损现象的新型功能表面提供了有前景的方法。在本研究中，我们报告了受海洋十足目螃蟹哈氏美人虾（Myomenippe hardwickii）启发的表面图案与化学表面改性相结合对抑制海洋污损的协同效应。尽管哈氏美人虾生活在热带浅潮下沿海水域的生物污损群落中，但已知该物种能保持相对清洁的甲壳。在对选定标本进行表面分析后，我们设计了分级表面微观形貌，以复制在甲壳类动物表面观察到的关键特征。用两性离子聚合物刷或逐层沉积的聚电解质多层膜对微图案化表面进行改性，以增强其防污和/或污损释放潜力。对化学改性和未改性的微图案化表面进行了广泛的污损测试，包括针对藤壶附着和藻类粘附的实验室测定以及现场静态浸泡测试。结果表明，微图案化表面上的附着有统计学上的显著减少，并且当微观形貌与接枝聚合物链结合时具有协同效应。
