Multi-bionic strategy combined with surface for anti-fouling

More and more bio-inspired methods are used to obtain anti-fouling surfaces, in which the structure plays a pivotal role in bionic coatings. It is a trend to prepare dynamic anti-fouling surfaces to improve the anti-fouling performance of the surface and synthesis the large-scale surface. Therefore, based on the special multilevel structure of Folium Sennae, the Folium Sennae-inspired surface was prepared and modified by the active molecule from Folium Sennae here (GFSF-x, AGFSF-y). Based on the excellent anti-fouling of Folium Sennae-inspired surfaces, a series of arrayed dynamic surfaces with structure-controlling liquid behavior were prepared (VMxFy). Among them, AGFSF-5 shows an excellent anti-fouling performance, whose anti-diatom attachment rate is as high as 97.8 %. The arrayed-structured coatings (MxFy) exhibit an ability to hinder the adhesion of plaque in mussel adhesion experiments. In addition, the inhibition attachment rate of diatoms of AGMPF-4 (MxFy was subjected to optimal concentration assembly) is 83.7 %, while it is 99.5 % of VMxFy. Besides, the liquid grows dynamically along the arrayed structure, and the height of VMNF-4 increased from 15.12 to 206.26 μm. The bio-inspired surfaces based on the two methods here show outstanding anti-fouling ability, in particular, the arrayed-structured surface controlling liquid behavior. This study provides a new idea for the construction of dynamic structural surfaces and shows the practical application potential due to its ability to large-scale surface texture.