Study On The Super-Hydropholic And Self-Cleaning Characteristic Of Butterfly Wing Surfaces

Because the water resource of our country one is deficient day by day,superficial clearance and cost of maintenance more and more heavy, is itwater-repellency surface and self-cleaning surface already extremelyurgent to have to launch. Water-repellency can discover a lot of animalsand plants surface is dredged , in they complicated surface microstructure, different micro composition or set of structure form superficialclean function since, have person who anti-adhesive instead to pollutant ,the water droplet will take the pollutant and particle away whileundergoing the surface -it is to "Lotus-effect" surface or self-cleaningsurface.Butterfly (biological name: scalewing ) wing for resist wind , rain , fog ,reveal , dust ,etc. have destructive invasion and attack of unfavourablefactor surface, through long-term evolution and natural selection, alreadyconscientious spontaneous forming person who seize , person whonon-wettability, is it self-cleaning function since to show as. Think frombody surface shape butterfly wing surface macroscopic have greatmajority smooth, have a few kind have companion catch body hair , cansee body surface their shape composed of scales smooth surface non-under microscope, this is " non-smoothness surface of living beings "talked about.This paper has carried on the macroscopic, micro observation to thewing surface of many kinds of butterflies through Confocal LightMicroscopy, Scanning Electron Microscopy and interface tension /contactangle measurement, to butterfly wing superficial person whowater-repellency and self-cleaning to be since getting clean to make moresystematic research, and has analysed , the main conclusion is as followsto its mechanism : 1, Work through the field in 2003 and two summers of 2004, catchplannedly the common butterfly kind, gather butterfly's sample andamount to33 Species of 7 families altogether, more than 1,000, havemade butterfly's sample, has all appraised classifying . 2, Use the Confocal Light Microscop and Scanning ElectronMicroscopy to observe many kinds of butterfly's wing surface shapes , geta large number of wing picture and relevant data of surface, butterfly wingsurface is it have tiny to deploy, unit body of its wing surface of butterflywhich different departments belong to --All kinds of size of the scale isdifferent. Have studied the permutation way of the unit body on thesurface of wing of butterfly taking scale as unit body, such parameters asthe size , density to one micron of scales unit body ,etc. are classified ,and nanometer grades of second micron geometry structure on thesurface is it determine the nature description to go on to unit body (scale). 3, Go on static behavior keep in touch corner measurement todifferent types of butterfly wing surface, find the butterfly wing surfacesuper-hydrophobic, it contacts the angle among 141°-163.5°. Byapplying water/methanol solutions of decreasing surface tension to aselection of butterfly wings'surface showing different types of surfacestructures, the critical value at which wetting occurs was determined.Carry on the wetting test to the butterfly wing surface with oil and souralkali solution at the same time , calculate the free energy on the butterflywing surface, receive a large number of results of the test . Result of thetest indicate department , Nymphalidae and Papilionidae etc. , whosehave great scale contact between horn and general than Hesperiidae ,Lycaenidae ,etc. on good terms kind person who wet of kind. 4, Measured the sliding angle of butterfly wing surface(contact angleof hysteresis) and analyzed the way a water droplet tends to move. Haveobserved and compared the test to butterfly's wing superficial resistingpollution performance , think butterfly wing surface have fine self-cleaningfunction since. 5, Improve with Young equation Wenzel equation , Cassie equation is...