Wetting Characteristics of Insect Wing Surfaces-中国期刊网

摘要 Biologicaltinystructureshavebeenobservedonmanykindsofsurfacessuchaslotusleaves,whichhaveaneffectonthecolorationofMorphobutterfliesandenhancethehydrophobicityofnaturalsurfaces.Weinvestigatedthemicro-scaleandnano-scalestructuresonthewingsurfacesofinsectsandfoundthatthehierarchicalmultipleroughnessstructureshelpinenhancingthehydrophobicity.Afterexamining10ordersand24speciesofflyingPterygotaninsects,wefoundthatmicro-scaleandnano-scalestructurestypicallyexistonboththeupperandlowerwingsurfacesofflyinginsects.Thetinystructuressuchasdenticleorsetaeontheinsectwingsenhancethehydrophobicity,therebyenablingthewingstobecleanedmoreeasily.AndthehydrophobicinsectwingsundergoatransitionfromCassietoWenzelstatesatpitch/sizeratioofabout20.Inordertoexaminethewettingcharacteristicsonaroughsurface,abiomimeticsurfacewithmicro-scalepillarsisfabricatedonasiliconwafer,whichexhibitsthesamebehaviorastheinsectwing,withtheCassie-Wenzeltransitionoccurringconsistentlyaroundapitch/widthvalueof20.

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Wetting Characteristics of Insect Wing Surfaces

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Wetting Characteristics of Insect Wing Surfaces

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