Research On The Fabrication Of Hydrophobic/Oleophobic Surfaces Base On Biological Microstructures

The development of human society is based on materials in a sense, excellentmaterials promote social development and social development calls for new materials.Creatures in the nature have been fully adapt to the environment because of evolution.Lots of biological materials have excellent characteristics which are artificial materialscan not match. So learning from nature is a constant theme of materials and socialdevelopment. Since the lotus effect has been found in the1970s, bionics has been a hottopic of practical application. Hydrophobic and oleophobic build a bridge betweennature and technology as a vivid example of bionics.Butterflies and peacock feathers not only have superhydrophobic function butalso have brilliant structural color. We found that the surface of butterfly wings havemany periodic arrangement scales. So we propose a method of laser interference tofabricate micro-pillar arrays structure with superhydrophobic function and structuralcolor.The compound eyes of insects show a low light reflectivity. Studies find thatcompound eyes are composed of many regular micro-apophysis which increases thetransmittance of light. Inspired by this phenomenon, we fabricate PDMS films withsub-micron-pillar arrays combining laser interference and soft transfer, which showsuperhydrophobic and antireflection. When applied to OLED devices,the filmssignificantly improve device efficiency. This work provides a new approach toimprove efficiency of lighting and display.The fish scale shows hydrophile and lipophilic in air, but shows oleophobic inwater. We fabricate surfaces showing superoleophobic and self-cleaning, which isconbining multistage structure and oxygen plasma treatment. This surface isbiocompatible and environmentally friendly, having a good prospect in industrialproduction and daily life. Furthermore, as a example of application, we apply thesurface in lab on chip and fabricate anti-oil microfluidic channels. In summary, inspired by exceptional wettability and features of the biologicalsurfaces, we fabricate several different biomimetic surfaces by simple and easyoperation means. Test results show that those surfaces have excellent wettability andfunctionality. Our work not only has big practical value, but also provide new ideas forresearch and application of bionic superhydrophobic and oleophobic.