CN108358155A - A kind of imitative not contour micro-nano structure of qinling geosynclinal leaf Anti-ice-and-snow multilayer - Google Patents
A kind of imitative not contour micro-nano structure of qinling geosynclinal leaf Anti-ice-and-snow multilayer Download PDFInfo
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- CN108358155A CN108358155A CN201711485958.4A CN201711485958A CN108358155A CN 108358155 A CN108358155 A CN 108358155A CN 201711485958 A CN201711485958 A CN 201711485958A CN 108358155 A CN108358155 A CN 108358155A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
Abstract
The present invention has captured a kind of imitative not contour micro-nano structure of qinling geosynclinal leaf Anti-ice-and-snow multilayer, belongs to field of material preparation.The structure includes the not contour micro-nano structure of multilayer being placed in substrate, the respectively columnar structures 1 of array arrangement, shuttle-type structure 2, papillary structure 3, columnar nano-structure body 4.The present invention passes through new bionical object-qinling geosynclinal leaf, it is proposed that a kind of imitative not contour micro-nano structure of qinling geosynclinal leaf Anti-ice-and-snow multilayer.The advantageous effect that the structure has in terms of Anti-ice-and-snow is demonstrated by Anti-ice-and-snow mechanism and experimental data.
Description
Technical field
The present invention relates to a kind of imitative not contour micro-nano structures of qinling geosynclinal leaf Anti-ice-and-snow multilayer, belong to field of material preparation.
Background technology
Ice and snow threatens Flight Safety, can cause aircraft out of control when serious or even crash.Existing machinery, electric heating, gas
The aircrafts such as heat are anti-/ that there are energy consumptions is big for de-icing method, load is big deficiency.Propose bionic micro-nano structure surface in the world in recent years
The new method of Anti-ice-and-snow.It was discovered by researchers that the super hydrophobic surface (superhydrophobic surfaces, SHS) of imitative lotus leaf
With lubricant layer surface (slippery liquid-infused porous surfaceses, the SLIPS, or cunning of imitative common nepenthes
Liquid relief body impregnating porous surface) there is good Anti-ice-and-snow performance.Bionic micro-nano structure surface Anti-ice-and-snow method have Non-energy-consumption,
Without additional mechanism, it is environmentally protective the advantages that, become international research hot spot.
Invention content
Although the imitative super-hydrophobic Anti-ice-and-snow of lotus leaf and the research of common nepenthes surface lubrication layer Anti-ice-and-snow have made great progress, section
It is endless to learn exploration.Nature has other bionical object or not, has different Anti-ice-and-snow mechanism
The present invention has turned one's attention to the Qinling Mountains high mountain of 2000 meters of height above sea level or more, and (this area has half a year more times to have every year
Ice and snow), specially organize multiple outdoor mountain-climbing to look for new inspiration.Everything comes to him who waits, it has been found that is arrived in height above sea level 2200
A kind of qinling geosynclinal leaf of 2900 meters of Qinling Mountains mesophorbium, coryphile area growth has excellent Anti-ice-and-snow performance, and surface seldom covers ice
Snow, is easy to split away off from blade surface having snow and ice cover.
In order to verify this it is assumed that we take instrument and equipment, Qinling Mountains mesophorbium, coryphile area is climbed up in snowy day, by Qinling Mountains arrow
The leaf of bamboo is compared with lotus leaf.We tilt the leaf of bamboo by the homemade experimental provision for rolling angle measuring device similar to liquid
And lotus leaf surface, the angle (corresponding to avenge the different tangential force that falls off on surface) that test snow falls off on surface exist to evaluate ice and snow
The adhesive capacity on surface.The experimental results showed that snow is easier to fall off on leaf of bamboo surface, the angle ratio to fall off is small in lotus leaf surface
Ten several years.In addition to adhering to contrast experiment, we also postpone contrast experiment by icing, it is found that arrow leaf of bamboo surface freezes delay time
Slightly below lotus leaf, the main reason for illustrating arrow leaf of bamboo Anti-ice-and-snow, are to reduce adherency and non-delayed freezing time.At the beginning of above-mentioned experiment
Step demonstrate ours it is assumed that i.e. qinling geosynclinal leaf surface Anti-ice-and-snow be because it greatly reduce ice and snow adherency.
Further we will ask, why qinling geosynclinal leaf greatly reduces ice and snow adherency compared to lotus leafExisting research
Show that surface microstructure has important influence to performance, therefore we expect entering from surface microstructure naturally
Hand is studied.By scanning electron microscope observation qinling geosynclinal leaf surface microstructure, it is found that its pattern is the not contour micro-nano of multilayer
Structure, it is clear that the surface of qinling geosynclinal leaf is different from the surface of lotus leaf.
The imitative not contour micro-nano structure of qinling geosynclinal leaf Anti-ice-and-snow multilayer proposed by the present invention, including the multilayer that is placed in substrate
Not contour micro-nano structure.As shown in Figure 1：
First layer be array arrangement columnar structures 1,30 to 50 microns of the altitude range of the columnar structures 1, directly
10 to 20 microns of diameter range, 50 to 100 microns of the horizontal spacing range of columnar structures 1,30 to 70 microns of longitudinal pitch range；
Second layer structure is the shuttle-type structure 2 of array distribution, and one end of the fusiformis structure 2 carries wedge angle, another
End carries circular arc camber, and wedge angle is connect with circular arc camber with smooth surface, and the super same side of closed angle end of all fusiformis structures 2
To arrangement；20 to 60 microns of 2 length range of fusiformis structure, 10 to 30 microns of width range, altitude range 10 to 20 is micro-
Rice, 50 to 100 microns of the horizontal spacing range of fusiformis structure 2,30 to 60 microns of longitudinal pitch range；
Third layer structure is that the papillary structure 3 of array distribution is similar with the mastoid process structure of lotus leaf, is reduced to one here
A cylinder, 5 to 10 microns of the altitude range of the papillary structure 3,5 to 10 microns of diameter range, papillary structure 3
5 to 10 microns of horizontal spacing range, 5 to 10 microns of longitudinal pitch range；
Four-layer structure is to be clouded in the columnar nano-structure body 4 of substrate surface, the altitude range of the columnar structures 4
500 to 1000 nanometers, 200 to 500 nanometers of diameter range, 3 to 6 microns of the horizontal spacing range of columnar structures 4, longitudinal pitch
2 to 5 microns of range.
In the present invention, the arrangement of the not contour micro-nano structure of multilayer is either a kind of orderly arrangement, i.e. each structure
Arrangement of the unit on ranks is all that point-blank, and the distribution density on unit area is identical；Can also be one
The arrangement of kind dislocation, i.e. arrangement of each structural unit on ranks is not point-blank, it may appear that up and down, or so
Offset, and the distribution density on unit area is also different.
The substrate can also be a curve face with different curvature, while also including either a plane
Some Irregular Boundary Surfaces.
In the present invention, the materials such as metal, inorganic non-metallic, polymer can be used to prepare in above-mentioned two structure sheaf, gold
Belong to material such as aluminium, copper, steel etc. and its alloy material, inorganic non-metallic material such as glass, ceramics etc., polymer material is such as
PDMS (dimethyl silicone polymer), photoresist etc..
Present invention finds a kind of new bionical object-qinling geosynclinal leaf, this qinling geosynclinal leaf has more compared with lotus leaf
Good Anti-ice-and-snow ability, to propose a kind of imitative not contour micro-nano structure of qinling geosynclinal leaf Anti-ice-and-snow multilayer.Institute in the present invention
The Anti-ice-and-snow mechanism of the not contour micro-nano structure of the multilayer of proposition is as follows：
Ideal adherency is the irreversible thermodynamic of separation unit area between two phases for possessing initial coboundary by one
Process.Actual adherency must take into account all possible aspect across junction energy transfer, not only consider ideal viscous
Attached intensity, it is contemplated that the quantity and size of blibbing and crackle, irreversible rupture process.
Ideal adhesion strength Fad is related to intermolecular active force, it, which can provide an interface and be destroyed in appearance, (divides
From) before the maximum power born or work(, as shown in formula
In formula, Fad is ideal adhesion strength；WA(B)B(A)It is adhesion work, indicates the unit area of two media A, B from connecing
Contact separate to infinity apart from when free energy variation；r0The equilibrium distance of separation, the usually quantity in several molecular diameters
Grade (0.2-0.5nm).Due to intermolecular there are mutual active force, when increasing material surface product, outer bound pair substance body is needed
System's acting.When detaching ice and snow and imitative qinling geosynclinal leaf surface, the not contour micro-nano structure surface of multilayer makes actually connecing for ice and snow
Contacting surface product is reduced, and leads to smaller adhesion work.
Cause ideal and practical adhesion strength difference one the reason is that interface zone almost always existing bubble with split
Line.Snow and ice cover is easy to form bubble in the pocket entrapped air of micro-structure on microstructure rough surface.Compared with
Lotus leaf (the double-deck micro-nano compound structure of mastoid process plus nano protrusion) or general other micro-nano compound structures, it is proposed by the present invention
The not contour micro-nano structure of multilayer of imitative qinling geosynclinal leaf, increases number of bubbles and volume, reduces between ice and snow and surface micro-structure
Gu admittedly mechanical interlocked；On the other hand, the not contour micro-structure of multilayer forms more interface abruptness, can lead to stress concentration, make to split
Line is more also easy to produce and develops, so that having lower ice and snow adhesion strength on surface.
Rupture at actual engagement includes mainly two ways --- and the adhesive failure of joint or the cohesion near it are broken
It is bad, as shown in Figure 2.The correct identification of failure mode has very important significance, if it is possible to determine that it is to be happened to lean on to destroy
The cohesional failure (a) at nearly interface, then the cohesive strength of medium is less than adhesion strength；If destruction is happened on interface (b), that
The cohesive strength of medium is more than adhesion strength.Due to imitating the not contour micro-nano structure of multilayer of the arrow leaf of bamboo so that ice and snow is tangential
Under the action of component, it is more prone to fall off.
In embodiment, it is not contour micro- by using the 3D printer of German Nanoscribe to produce a multilayer for we
Micro-nano structure and double-deck an imitative lotus leaf micro-nano compound structure and a smooth flat.Be found through experiments that has multilayer really
The adhesion strength smaller of not contour micro-nano structure, its adhesion strength are the half of double-deck imitative lotus leaf micro-nano compound structure, smooth flat
/ 10th of face also illustrate that the not contour micro-nano structure of multilayer of the imitative arrow leaf of bamboo proposed by the present invention is excellent in terms of Anti-ice-and-snow
Gesture.
Description of the drawings
Fig. 1 shows the axonometric drawings of the not contour micro-nano structure of multilayer
Fig. 2 indicates ice and snow difference failure mode schematic diagram
Fig. 3 indicates the side view of the not contour micro-nano structure of multilayer
Fig. 4 indicates the vertical view of the not contour micro-nano structure of multilayer
Fig. 5 indicates the axonometric drawing in different base face
Specific implementation mode
Specific implementation mode 1
Substrate and surface micro-structure are made of titanium alloy, and substrate is a plane, the not contour micro-nano structure of this multilayer, and first
Layer is column structure, and height is 40 microns, and diameter is 15 microns, and the horizontal spacing of structure is 70 microns, and longitudinal pitch is
45 microns；The second layer is shuttle-type structure, and fusiformis structure body length is 50 microns, and width is 15 microns, and height is 15 microns, structure
The horizontal spacing of body is 70 microns, and longitudinal pitch is 45 microns；Third layer is papillary structure, is reduced to a cylinder here,
The height of this cylinder is 7 microns, and diameter is 8 microns, and the horizontal spacing of structure is 6 microns, and longitudinal pitch is 6 microns；The
Four layers are columnar nano-structure, and the height of pillar is 600 nanometers, and diameter is 300 nanometers, and the horizontal spacing of structure is 4 microns,
Longitudinal pitch is 3 microns.
Specific implementation mode 2
Substrate and surface micro-structure are made of PDMS flexible (dimethyl silicone polymer), the not contour micro-nano knot of this multilayer
Structure, first layer are column structure, and the height of pillar is 45 microns, and diameter is 17 microns, and the horizontal spacing of structure is 80 microns,
Longitudinal pitch is 50 microns；The second layer is shuttle-type structure, and fusiformis structure body length is 55 microns, and width is 17 microns, and height is
15 microns, the horizontal spacing of structure is 80 microns, and longitudinal pitch is 50 microns；Third layer is papillary structure, is simplified here
Height for a cylinder, this cylinder is 8 microns, and diameter is 7 microns, and the horizontal spacing of structure is 7 microns, longitudinal pitch
It is 7 microns；Four-layer structure is column structure, and the height of pillar is 700 nanometers, and diameter is 350 nanometers, between the transverse direction of structure
Away from being 5 microns, longitudinal pitch is 4 microns.As shown in a figures in Fig. 5, its substrate is a plane.If the b in Fig. 5 schemes,
Its substrate is a curve face for having certain curvature.
Claims (4)
1. a kind of imitative qinling geosynclinal leaf, which is characterized in that the not contour micro-nano structure of Anti-ice-and-snow multilayer including being placed in substrate：
First layer is the columnar structures 1 of array arrangement, 30 to 50 microns of the altitude range of the columnar structures 1, diameter model
Enclose 10 to 20 microns, 50 to 100 microns of the horizontal spacing range of columnar structures 1,30 to 70 microns of longitudinal pitch range；
Second layer structure is the shuttle-type structure 2 of array distribution, and one end of the fusiformis structure 2 carries wedge angle, other end band
There are circular arc camber, wedge angle to be connect with smooth surface with circular arc camber, and the super same direction row of closed angle end of all fusiformis structures 2
Row；20 to 60 microns of 2 length range of fusiformis structure, 10 to 30 microns of width range, 10 to 20 microns of altitude range, shuttle
50 to 100 microns of the horizontal spacing range of shape structure 2,30 to 60 microns of longitudinal pitch range；
Third layer structure is that the papillary structure 3 of array distribution is similar with the mastoid process structure of lotus leaf, is reduced to a circle here
Cylinder, 5 to 10 microns of the altitude range of the papillary structure 3,5 to 10 microns of diameter range, the cross of papillary structure 3
To 5 to 10 microns of spacing range, 5 to 10 microns of longitudinal pitch range；
Four-layer structure is to be clouded in the columnar nano-structure body 4 of substrate surface, the altitude range 500 of the columnar structures 4
To 1000 nanometers, 200 to 500 nanometers of diameter range, 3 to 6 microns of the horizontal spacing range of columnar structures 4, longitudinal pitch model
Enclose 2 to 5 microns.
2. a kind of not contour micro-nano structure of imitative qinling geosynclinal leaf Anti-ice-and-snow multilayer as described in claim 1, which is characterized in that more
The arrangement of the not contour micro-nano structure of layer either a kind of orderly arrangement, i.e. arrangement of each structural unit on ranks all
It is that point-blank, and the distribution density on unit area is identical；Can also be a kind of arrangement of dislocation, i.e., each
Arrangement of the structural unit on ranks is not point-blank, it may appear that upper and lower, left and right offset, and point on unit area
Cloth density is also different.
3. a kind of not contour micro-nano structure of imitative qinling geosynclinal leaf Anti-ice-and-snow multilayer as described in claim 1, which is characterized in that institute
Substrate is stated either a plane, can also be a curve face with different curvature, while also including some and not advising
Then curved surface.
4. a kind of not contour micro-nano structure of imitative qinling geosynclinal leaf Anti-ice-and-snow multilayer as described in claim 1, which is characterized in that institute
It is inorganic non-metallic material or polymer material to state the not contour micro-nano structure material of multilayer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485958.4A CN108358155B (en) | 2017-12-29 | 2017-12-29 | Multilayer unequal-height micro-nano structure imitating Qinling mountain arrowleaf to prevent ice and snow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485958.4A CN108358155B (en) | 2017-12-29 | 2017-12-29 | Multilayer unequal-height micro-nano structure imitating Qinling mountain arrowleaf to prevent ice and snow |
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| CN108358155A true CN108358155A (en) | 2018-08-03 |
| CN108358155B CN108358155B (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090485A (en) * | 2021-04-02 | 2021-07-09 | 燕山大学 | Hydraulic axial plunger pump sliding shoe pair with lotus leaf texture surface |
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| CN106564219A (en) * | 2016-10-31 | 2017-04-19 | 华南理工大学 | Anti-atomization micro and nano composite structure film and preparation method thereof |
| WO2017172409A1 (en) * | 2016-03-28 | 2017-10-05 | University Of Houston System | Magnetic surfaces and uses thereof |
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- 2017-12-29 CN CN201711485958.4A patent/CN108358155B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20110177288A1 (en) * | 2008-08-01 | 2011-07-21 | Bharat Bhushan | Hierarchical structures for superhydrophobic surfaces and methods of making |
| CN201970805U (en) * | 2011-03-18 | 2011-09-14 | 周利坤 | Bionic automotive anti-slipping cover |
| CN103889687A (en) * | 2011-09-19 | 2014-06-25 | 维斯塔斯风力系统集团公司 | A method of fabricating a surface for reducing ice adhesion strength |
| CN102492945A (en) * | 2011-12-09 | 2012-06-13 | 北京航空航天大学 | Ice coating prevention surface of bionic micro-nano composite structure and preparation method thereof |
| WO2017172409A1 (en) * | 2016-03-28 | 2017-10-05 | University Of Houston System | Magnetic surfaces and uses thereof |
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| CN113090485A (en) * | 2021-04-02 | 2021-07-09 | 燕山大学 | Hydraulic axial plunger pump sliding shoe pair with lotus leaf texture surface |
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| CN108358155B (en) | 2020-06-16 |
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