Research On Bionic Preparation And Antifouling Performance Of Hierarchical Wrinkle Structure Surface

Biofouling is widespread in various fields such as the ocean and industry,and the harm is serious.The anti-fouling measures released by anti-fouling agents greatly reduce the attachment of fouling organisms,but the ecological toxicity and environmental pollution caused by them cannot be ignored.Therefore,the research and development of green and efficient physical antifouling technology is of great significance.In this study,inspired by the structure of rose pistil stigma and its super-hydrophobic binding superadhesive properties,the surface structure of the spherical array of rose pistil stigma and its related antifouling properties were systematically studied for the first time.Hierarchical wrinkle structure,and its anti-fouling performance has been tested.(1)The structural characteristics of RPS were studied.It was discovered for the first time that the surface of the RPS is radially distributed with finger-like micropillars(aspect ratio≈2)with a hierarchical fold structure,and the tips of the micropillars are hydrophilic.RPS has surface structure characteristics such as superhydrophobicity and strong adhesion to droplets.The special wetting behavior of RPS is closely related to its hierarchical microstructure and surface chemical properties.Its surface is covered with multi-level rough microstructures-finger-like micropillars can form a CassieImpregnating contact state with water,thereby preventing the intrusion of water stains.This provides a valuable reference for the subsequent design and preparation of bionic materials.(2)According to the structural characteristics of RPS,a biomimetic surface microstructure is constructed by the method of self-initiating wrinkles on the basis of the low surface energy anti-fouling flexible material polydimethylsiloxane(PDMS)introduced with nanoparticles,and modified by chemical reagents.A super-hydrophobic regular rough surface structure was prepared on a curved substrate.The surface of the bionic stigma-shaped layered structure has both super-hydrophobicity and high adhesion,and can stably retain an air layer underwater to achieve the purpose of physical antifouling.The water contact angle of the prepared Bionic Rose Pistil Stigma(BRPS)array can reach 173±2°.(3)Carried out anti-fouling test based on BRPS array surface.Different algae and bacteria were selected as the antifouling performance test organisms,and it was found that BRPS can effectively prevent the initial attachment of fouling organisms,and the antifouling efficiency is as high as 92%.And further explored the impact of different BRPS surface topologies and changes in their parameters on the anti-fouling results,and found that BRPS with an array structure has super-hydrophobic properties and a microstructured surface that resists water immersion,which can effectively stabilize the airwater interface and reduce the surface The contact of fouling organisms can resist the initial attachment of microorganisms and prevent the occurrence of biofouling.The research results provide new ideas for the design of new green antifouling materials.