CN108167281A - A kind of accessible guidance method of drop based on porous water absorbent fiber - Google Patents
A kind of accessible guidance method of drop based on porous water absorbent fiber Download PDFInfo
- Publication number
- CN108167281A CN108167281A CN201711263687.8A CN201711263687A CN108167281A CN 108167281 A CN108167281 A CN 108167281A CN 201711263687 A CN201711263687 A CN 201711263687A CN 108167281 A CN108167281 A CN 108167281A
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- Prior art keywords
- drop
- porous
- fibrous material
- porous fibrous
- saturated aqueous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0085—Methods of making characteristic surfaces for influencing the boundary layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0025—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply
- F15D1/003—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of accessible guidance methods of the drop based on porous water absorbent fiber, guide rails are made using porous fibrous material, track made of porous fibrous material is positioned in moisture absorption saturated aqueous solution, it stands, porous fibrous material is made by solution impregnation, to take out porous fibrous material completely and dry;The porous fibre of drying is bent to the specific location that drop to be guided is fixed on after predetermined shape.The material of guide rails makes porous fibrous material surface permanent the effective time of guide rails be enable to extend there are the moisture film that a layer thickness is micron order scale due to the hydrone in the absorbable air of moisture absorption saturated aqueous solution processing.After after the moisture film of guiding drop contact to porous fibre surface, strong inter-molecular attraction is generated so that drop is bound tightly on porous fibre, ensures that the space angle range that drop does not derail is big, and effectively expand drop guides occasion;And it simple operation, conveniently promotes the use of.
Description
Technical field
The present invention relates to drop behaviour control field, specifically, being related to a kind of utilizing the steady of porous water absorbent fiber surface
Determine the method that water film realizes the accessible orientation guiding of drop.
Background technology
Drop behaviour control is to be transformed to the property of drop or with the property on the surface of drop contact so that liquid
The research that drop can be moved according to scheduled track.Using drop behaviour control method, the motion path of drop is controlled,
It can solve a series of engineering problems;Such as:Completely new think of is provided to solve Proton Exchange Membrane Fuel Cells decorporation water problems
Road, the separation for mixed solution provide completely new approach etc..
Existing drop control method is concentrated mainly on by control of the electromagnetic field realization to magnetic fluid, in general drop
, it can be achieved that guiding to drop small distance in terms of motion control.104345140 A of patent of invention CN disclose a kind of " magnetic fluid
Control device and its control method ", which, which can not realize, controls general drop;In 105833814 A of patent CN
Mainly in micro- reaction system in " a kind of drop self-driving type microreactor ", the device is complicated for operation, and can guide away from
From limited;1588090 A of patent CN are related to " a kind of low pressure microlayer model control device based on surface tension ", the microlayer model control
Device processed is directed to microfluid, and control condition is complicated;" a kind of to be based on wall surface involved in 106053869 A of patent of invention CN
The guidance method of the drop massless loss of wetting regulation and control ", this method needs the environment cleaning that drop guides without larger dust.
Many very valuable methods are provided to the behaviour control of drop in existing technical literature, but there is also not
Foot:Such as, there is limitation to drop Property requirements;The control system of part guidance method is complicated, not easy to operate and popularization;Guiding side
Method is to environmental requirement height.
Invention content
In order to avoid the shortcomings of the prior art, the present invention proposes that a kind of drop based on porous water absorbent fiber is accessible
Guidance method.
The technical solution adopted by the present invention to solve the technical problems is:Drop based on porous water absorbent fiber is accessible to lead
Draw method, it is characterised in that include the following steps:
Step 1. cleans material surface to be treated, and surface to be treated is arbitrary shape face;
Step 2. selects porous fibrous material, and required orbital path is made on porous fibrous material;
Step 3. dissolves high-purity hygroscopic agent in water, and moisture absorption saturated aqueous solution is made;
Track made of porous fibrous material is positioned in moisture absorption saturated aqueous solution by step 4., is stood 6h, is made porous fibre
Material is tieed up completely by solution impregnation, takes out porous fibrous material, drying;
The porous fibrous material of orbital path is fixed on the surface handled by step 1 by step 5., completes hygroscopic material
Moisture film guiding make;
Step 6. adds drop on the track of step 5, and adjusts the plane where drop trajectories and the angle of horizontal plane
The value range at β, β angle is 0~180 °;Apply external force, adjusting external force size makes drop even along the predetermined guide rails on surface
Speed movement, realizes the guiding of any direction.
Advantageous effect
The accessible guidance method of a kind of drop based on porous water absorbent fiber proposed by the present invention, using porous fibrous material
Guide rails are made, track made of porous fibrous material is positioned in moisture absorption saturated aqueous solution, is stood, is made porous fibrous material
Completely by solution impregnation, take out porous fibrous material and dry;It is fixed on after the porous fibre of drying is bent to predetermined shape
The specific location of drop to be guided.The material of guide rails is due to the moisture in the absorbable air of moisture absorption saturated aqueous solution processing
Son, making porous fibrous material surface permanent, there are the moisture films that a layer thickness is micron order scale, make the effective time of guide rails
Extended.After after the moisture film of guiding drop contact to porous fibre surface, strong inter-molecular attraction is generated so that liquid
Drop is bound tightly on porous fibre, ensures that the space angle range that drop does not derail is big, effectively expands leading for drop
Draw occasion;And it simple operation, conveniently promotes the use of.
The accessible guidance method of drop of the present invention without particular/special requirement, can meet the shape and roughness of drop guidance surface
The demand of any shape, width and angle.The guide function of guide wire is apparent, and the shape that guide wire is formed can be as needed
Change.
Description of the drawings
Below in conjunction with the accompanying drawings with embodiment to the accessible guiding side of a kind of drop based on porous water absorbent fiber of the invention
Method is described in further detail.
Fig. 1 is that drop moves schematic diagram in guide rails in two dimensional surface.
Fig. 2 is that drop moves schematic diagram in guide rails in three dimensions.
In figure:
1. 2. carbon paper of water droplet, 3. guide wire, 4. glycerite drips 5. cones
The angle of plane and horizontal plane where β drop guide wires
Specific embodiment
The present embodiment is a kind of accessible guidance method of the drop based on porous water absorbent fiber.
The similar principle that mixes of solubility points out that the similar substance of structure is easy to miscible between each other, and architectural difference is larger
Substance indissoluble.The dissolving of substance is intermolecular active force, and the intermolecular force of liquid internal determines solubility between liquid
Size, so, be absolutely mutually dissolved between same liquid, it is meant that the intermolecular attraction inside solution is compared to two
Kind different solutions absolute maximum.So it is comparatively ideal guidance method with moisture film guiding drop.
It is porous after immersion by the way that porous fibrous material is impregnated in hygroscopic agent saturated solution in the present embodiment
Saturation dilute solution can be full of inside fibrous material, is then taken out drying;The porous fibre of drying is bent into preboarding
The specific location of drop to be guided is fixed to after shape.Due to the hygroscopic effect of hygroscopic agent, porous fibrous material surface can be from sky
Hygroscopic moisture in gas is always maintained at the water film of one layer of micron order scale.When drop contact to be guided to porous fibre surface
Moisture film after, strong inter-molecular attraction can be generated so that drop is bound tightly on porous fibre.Even if by other
External force acts on, and can only also be moved along porous fibre direction, show good drop guide effect.Utilize the softness of porous fibre
Property, it can be spatially bent into Arbitrary 3 D shape.Therefore, the intense beam binding force between moisture film and drop, Ji Nengshi are utilized
Existing guiding of the drop on wall surface, can also realize guiding of the drop on three dimensions.In addition, due to the outstanding suction of hygroscopic agent
Wet ability, it is ensured that moisture film is muchly present on porous fibrous material, therefore the guidance method can for a long time effectively.But due to
The guidance method essence is the intermolecular force of drop, therefore the drop type that can be guided is only limitted to the surface tension coefficient with water
The drop of similar solution, the surface tension coefficient of water is 0.0732N/m.
Embodiment 1
Refering to Fig. 1, the present embodiment is using the porous carbon paper surface in Proton Exchange Membrane Fuel Cells as test surfaces, using chlorine
Change lithium and make moisture absorption saturated aqueous solution, the method for the angle β value by adjusting plane and horizontal plane where drop guide wire is real
Accessible guiding now based on moisture film guiding line traffic control, is as follows:
The first step selects carbon paper 2, and carbon paper size is 200 × 200mm, and carbon paper surface processing is clean, and fully dry;
Soluble in water moisture absorption saturated aqueous solution is made in the hygroscopic agent lithium chloride that purity is 99% by second step;
Third walks, and using a diameter of 1.5mm, length is the white cotton line of 500mm, is placed on the suction that step 2 is proposed
In wet saturated aqueous solution, 6h is stood, cotton thread is caused by solution impregnation, to take out drying completely;
Cotton line is pasted onto carbon paper surface by the 4th step, then by the processed moisture film guide wire 3 of hygroscopic agent saturated aqueous solution
Guidance system making finish;
5th step, it is 20 μ L water droplets 1 that volume is instilled on guide wire 3, and adjusts the plane where drop guide wire and water
The angle beta of plane included angle makes drop start to move on guide wire;
The angle β of plane where drop guide wire and horizontal plane is adjusted from 0 ° to 180 °, is tried respectively by the 6th step
It tests, tests the quality of moisture film guide wire guide effect;
7th step 7:After guiding device is placed 30 days, then the experiment of step 6 is carried out, test the lasting of guiding device
Property.
In the present embodiment, using the moisture-absorption characteristics of carbon paper surface lithium chloride and to water droplet there is superpower binding force to lead
Lead effectively fetters water droplet;Volume is that the startup angle that the water droplet of 20 μ L is moved along the guide wire of bending is
20°;When the plane where drop guide wire and the angle β value of horizontal plane are more than 180 °, water droplet is remained able to firmly by beam
It is tied on guide wire;After guide wire is placed one month, the guide function of guide wire is still apparent;Guide wire is formed in experiment
Shape can change as needed.
Embodiment 2
In the present embodiment, circular cone body Model is made with polystyrene material, makes three dimensions spiral-guide track, is used
Lithium chloride makes moisture absorption saturated aqueous solution immersion treatment, provides similar in surface tension coefficient and water 10% glycerite drop,
It realizes that glycerite drops in the accessible guiding of spatially spiral moisture film guiding line traffic control, is as follows:
The first step selects polystyrene material that cone is made, and base diameter 200mm is highly 200mm, by surface
Processing is clean, and fully dry;
Soluble in water moisture absorption saturated aqueous solution is made in the hygroscopic agent lithium chloride that purity is 99% by second step;
Third walks, and using a diameter of 1.5mm, length is the white cotton line of 300mm, is placed on the suction that step 2 is proposed
In wet saturated aqueous solution, 6h is stood, cotton thread is caused by solution impregnation, to take out drying completely;
Cotton line is pasted onto conical surface by the 4th step, then is guided by the processed moisture film of hygroscopic agent saturated aqueous solution
The guidance system making of line finishes;
5th step instills 10% glycerite that volume is 20 μ L on the top of guide wire and drips, and glycerite drops in
It is moved downward under gravity along guide wire;
6th step after guiding device is placed 30 days, then carries out the experiment of step 5, tests the lasting of guiding device.
In the present embodiment, in conical surface made of polystyrene material, the moisture-absorption characteristics of lithium chloride and right is utilized
Drop has the guide wire of superpower binding force, and drop is fettered and so that drop is directed in space;Guide wire is placed 30 days
Afterwards, the guide function of guide wire is apparent;The shape that guide wire is formed in experiment can change as needed.
Claims (1)
1. the accessible guidance method of a kind of drop based on porous water absorbent fiber, it is characterised in that include the following steps:
Step 1. cleans material surface to be treated, and surface to be treated is arbitrary shape face;
Step 2. selects porous fibrous material, and required orbital path is made on porous fibrous material;
Step 3. dissolves high-purity hygroscopic agent in water, and moisture absorption saturated aqueous solution is made;
Track made of porous fibrous material is positioned in moisture absorption saturated aqueous solution by step 4., is stood 6h, is made porous fibre material
Material by solution impregnation, takes out porous fibrous material, drying completely;
The porous fibrous material of orbital path is fixed on the surface handled by step 1 by step 5., completes the water of hygroscopic material
Film guiding makes;
Step 6. adds drop on the track of step 5, and adjusts the angle beta of the plane where drop trajectories and horizontal plane, β angles
Value range be 0~180 °;Apply external force, adjusting external force size makes drop at the uniform velocity be transported along the predetermined guide rails on surface
It is dynamic, realize the guiding of any direction.
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CN108167281B CN108167281B (en) | 2019-07-19 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1234112A (en) * | 1996-10-10 | 1999-11-03 | 康宁股份有限公司 | Tool and method for transfer of drops |
WO2016022869A1 (en) * | 2014-08-07 | 2016-02-11 | United Technologies Corporation | Article with controllable wettability |
CN107335490A (en) * | 2017-08-15 | 2017-11-10 | 肇庆市华师大光电产业研究院 | A kind of micro-fluidic chip of the PLC technology based on liquid liquid electrowetting effect |
CN108627666A (en) * | 2018-05-15 | 2018-10-09 | 西北工业大学 | A kind of drop recessiveness guidance method based on V-groove |
-
2017
- 2017-12-05 CN CN201711263687.8A patent/CN108167281B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1234112A (en) * | 1996-10-10 | 1999-11-03 | 康宁股份有限公司 | Tool and method for transfer of drops |
WO2016022869A1 (en) * | 2014-08-07 | 2016-02-11 | United Technologies Corporation | Article with controllable wettability |
CN107335490A (en) * | 2017-08-15 | 2017-11-10 | 肇庆市华师大光电产业研究院 | A kind of micro-fluidic chip of the PLC technology based on liquid liquid electrowetting effect |
CN108627666A (en) * | 2018-05-15 | 2018-10-09 | 西北工业大学 | A kind of drop recessiveness guidance method based on V-groove |
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