Evaluate Target Of Non-smoothness Of Living Creatures And Functional Experiment On Plant Surfaces

The non-smooth surfaces have excellent functions during theevolution and optimization of living creatures among hundreds millionyears, which make them adapt to the living environment better. Researchon the non-smooth morphological character of the living creaturesurface and its biomimetic has been considered to be of theoretical andacademic values.In recent years, the development of biomimetic non-smoothnessexpands a brand-new of thinking and studying route, which deviates fromtraditional conception. The research of non-smooth morphology of livingcreature is one of the front and hot-standpoint in international scienceand technology research currently. American and Germany scientists haveconducted the biomimetic research of aquatics' body surfaces and plantleaves. In China, the research on soil animals for considering theirbiomimetic anti-adhesion and anti-friction has been conducted moredeeply. This thesis carried on a series of experiments of the plantsurfaces, and analysis of the relationship between the non-smoothsurface appearance of plant and its wettability and adhesive strength.The comprehension and explanation of non-smooth were different indifferent research realm. The comprehension and meaning of non-smoothin four research realms, Engineering, Biomimetics, Dynamics andMathematics, were summarized in this thesis. The non-smooth surfacemorphological characters of plants and animals were classificatorydescribed according to the unit shape, the unit distribution, theholistic configuration and the ecological function. Though thedifferent living creature surface had different non-smooth appearance,it could be found that the structure of shape and distribution ofnon-smooth unit had certain regulations or likeness in the samenon-smooth type. Based on these characteristics, the gathering ofevaluate target of non-smooth surface appearances (F(x, y, z)) has beenbuilt up, including convex shape, concave shape, wavy shape, scaly shape,trichomes shape and epicuticular wax shape. The surface morphology of leaf, flower or hull of eleven plants hasbeen observed and analyzed using Stereoscopic Microscope (XTJ-30),including Filipendula intermedia, Umpkin, Cannabis sativa, Chenopodiumalbum, Callistephus chinensis Ness, Dahlia pinnata, lichee etc. Then,the surface micro-morphologies of Phrynium capitatum Willd,Umpkin leafand Pygmy Water lily leaf have been observed and analyzed usingElectronic Microscope System (JXA-840). It was found that the surfaceof plant had several non-smooth morphologies, and the shape, size anddistribute of non-smooth unit were different. The types of surfacemorphology were convex non-smoothness, trichomes non-smoothness andgridding non-smoothness. The contact angle of water on surfaces of seventeen plants have beenmeasured with an Interface Tension/ Contact-angle Measuring Instrument(JC2000A) , including Chenopodium album, Dianthus chinensis,Filipendula intermedia, Redstring etc. From the results we could seethat these plant surfaces exist the hydrophobicity universally. Theplants with the surface contact angle more than 90°were about 64.7%.The front surface contact angle was usually more than the surfacecontact angle in the reverse side. So, the front surface of plant hadeffective anti-adhesion and self-cleaning ability. Under the same experimental conditions, the adhesive strength ofrice on thirteen surfaces of six plants have been tested by theElectronic All-powerful Experimental Machine under computer...