CN105566666A - Method for realizing liquid drop directional transportation on super-hydrophobic substrate - Google Patents
Method for realizing liquid drop directional transportation on super-hydrophobic substrate Download PDFInfo
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- CN105566666A CN105566666A CN201410539557.2A CN201410539557A CN105566666A CN 105566666 A CN105566666 A CN 105566666A CN 201410539557 A CN201410539557 A CN 201410539557A CN 105566666 A CN105566666 A CN 105566666A
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Abstract
Belonging to the technical field of material surface treatment, the invention provides a method for realizing liquid drop directional transportation on a super-hydrophobic substrate. Selective plasma treatment is carried out on the surface of the super-hydrophobic substrate, high-energy particles and active ingredients in the plasmas decompose and oxidize super-hydrophobic groups in a treated area into hydrophilic groups, and the treated area is transformed into a hydrophilic area with high surface energy so as to realize directional transportation of liquid drops along a hydrophilic track. Plasma hydrophilization treatment with/without a mask is selected according to the relation of a needed hydrophilic track size and the selected plasma scale to obtain a directional transportation track with a predetermined width. The method provided by the invention has the advantages of simple operation, high treatment efficiency and low cost, and plasma action only decomposes low surface energy functional groups on a super-hydrophobic surface without destroying the surface micro-nano structure, thus realizing reversible hydrophilic treatment of the super-hydrophobic. The method can acquire the directional transportation track of arbitrary width to meet the directional transportation requirements of liquid drops with different sizes.
Description
Technical field
The invention belongs to technical field of material surface treatment, be specifically related to a kind of method realizing the transport of drop orientation on super-hydrophobic matrix.
Background technology
Super hydrophobic surface refers to that the contact angle of material surface and water droplet is greater than 150 ° and roll angle is less than 10 °, and the micro-nano microscopic appearance on its surface and hydrophobic functional group determine its hydrophobic performance.The transport of drop orientation refers to that drop is at the non-orbiting scroll of super hydrophobic surface along design.Potential using value is there is in it in the micro-fluidic field such as bioanalysis, drop separation.In recent years, realize at super hydrophobic surface the concern that the transport of drop orientation is subject to more and more expert, scholar.QianFengXu etc. (AppliedPhysicsLetters, 2008,93 (23), 233112.) mark the S molded line of a width about 200 μm at super hydrophobic surface with blade, realize water droplet and transport along the orientation of S molded line.(the ACSappliedmaterials & interfaces such as Seo, 2011,3 (12), 4722-4729.) by selectivity ultraviolet strengthening photodissociation, obtain the super hydrophilic track of both shaped at super hydrophobic surface, realize the multiple orientation transport of water droplet.Publication number be the patent of invention of 103966654A by carrying out special photoetching treatment at superhydrophobic surface of aluminum alloy, obtain having the directed rolling track of water droplet of specified shape, thus achieve the transport of drop orientation.Although above method can be implemented in super hydrophobic surface and realizes the transport of drop orientation, the poor or complex process of controllability, and causes irreversible destruction to super hydrophobic surface.
Summary of the invention
The present invention is intended to overcome the deficiencies such as destructiveness, complicacy and the poor universality that existing method exists, and provides a kind of method realizing the transport of drop orientation on super-hydrophobic matrix.By carrying out selective plasma hydrophilicity-imparting treatment to super-hydrophobic matrix, obtain the wetting ability track with specified shape, thus realize the orientation transport of drop.
Active high energy particle is rich in plasma body, when action of plasma is in super-hydrophobic matrix, the low surface energy functional group key on its surface is interrupted, and surface oxidation occurs, high surface energy functional group introduces matrix surface thereupon, and therefore processed surface changes water-wetted surface into.Do selective plasma hydrophilicity-imparting treatment at super hydrophobic surface, particular hydrophilic track can be formed.The part of drop and hydrophilic trajectories contact meets Wenzel model, and when drop rolls, suffered resistance is larger; The part that drop contacts with super hydrophobic surface meets Cassie model, and during rolling, suffered resistance is little.Therefore when after matrix tiltangleθ, drop can roll along designed wetting ability track under the comprehensive action of gravity and resistance.
Super-hydrophobic matrix realizes a method for drop orientation transport, and plasma body and super-hydrophobic matrix react, and make super-hydrophobic basic body transforms be water-wetted surface, obtain the wetting ability track of super-hydrophobic matrix surface:
1) when the cross-sectional dimension of plasma body is greater than required wetting ability track width, mask need be placed on super-hydrophobic matrix surface, plasma body is had an effect by hollow out position on mask and super-hydrophobic matrix surface, forms selectivity hydrophilicity-imparting treatment;
2) when plasma body and super hydrophobic surface effect cross-sectional dimension equal required wetting ability track width, do not need mask to assist can to obtain the wetting ability track of desired size; On described mask, the shape of hollow out position is identical with the shape of wetting ability track.
By the super-hydrophobic matrix inclination certain angle after process, enable drop along the wetting ability track flowing after process, realize drop directed transport on super-hydrophobic matrix.
On described mask, the shape of hollow out position is identical with the shape of wetting ability track.
The plasma body that super-hydrophobic matrix surface hydrophilicity-imparting treatment adopts is low pressure plasma or atmospheric pressure plasma.
Usefulness of the present invention is: simple to operate, processing efficiency is high, cost is low; Because action of plasma only decomposes the low surface energy functional group of super hydrophobic surface and failure surface micro nano structure hardly, realize to super hydrophobic surface can inverse hydrophilic process; The method can obtain the orientation transport track of any width, meets the directed movement requirement of liquid drops in different size; The method is applicable to multiple substrate ultra-hydrophobic surface, and versatility is good.Below in conjunction with drawings and Examples, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is that the present invention adopts mask to the schematic diagram of super hydrophobic surface hydrophilicity-imparting treatment.
Fig. 2 is that the present invention adopts without the schematic diagram of masking method to super hydrophobic surface hydrophilicity-imparting treatment.
Fig. 3 is the super hydrophobic surface drop orientation transport schematic diagram that the present invention obtains.
In figure: 1 super-hydrophobic matrix; 2 masks; Openwork part on 3 masks; 4 plasma bodys;
5 plasma bodys are at the movement locus of super-hydrophobic matrix surface; 6 drops;
7 wetting ability tracks (drop orientation transport track); θ is angle of inclination.
Embodiment
Below in conjunction with the super-hydrophobic matrix of technical scheme plasma jet process, make super-hydrophobic basic body transforms be water-wetted surface, obtain the wetting ability track of super-hydrophobic matrix surface.By the super-hydrophobic matrix inclination certain angle after process, enable drop along the wetting ability track flowing after process, realize drop directed transport on super-hydrophobic matrix.
Embodiment:
The present embodiment is that atmosphere cold plasma jet has mask hydrophilicity-imparting treatment to Super-hydrophobic aluminium surface, realizes the water droplet orientation transport on Super-hydrophobic aluminium surface.
Cold plasma fluid generator adopts publication number to be the atmospheric pressure nitrogen cold plasma fluid generator proposed in the patent of invention of CN102625557A, and working gas adopts purity to be the nitrogen of 99.999%.Because the plasma jet diameter produced is greater than required wetting ability track, therefore adopt mask plate in embodiment, " S " type curve of openwork part to be width be 0.5mm.Jet with the velocity process Super-hydrophobic aluminium of 1mm/s surface, forms wetting ability " S " track along " S " type track.Placed by matrix such as Fig. 3 after process, tiltangleθ=20 °, drip the water droplet of 20 μ L in " S " upstream, and " S " type track along design rolls by the globule.
Claims (3)
1. on super-hydrophobic matrix, realize a method for drop orientation transport, it is characterized in that, plasma body and super-hydrophobic matrix react, and make super-hydrophobic basic body transforms be water-wetted surface, obtain the wetting ability track of super-hydrophobic matrix surface:
1) when the cross-sectional dimension of plasma body is greater than required wetting ability track width, mask need be placed on super-hydrophobic matrix surface, plasma body is had an effect by hollow out position on mask and super-hydrophobic matrix surface, forms selectivity hydrophilicity-imparting treatment;
2) when plasma body and super hydrophobic surface effect cross-sectional dimension equal required wetting ability track width, do not need mask to assist can to obtain the wetting ability track of desired size; On described mask, the shape of hollow out position is identical with the shape of wetting ability track;
By the super-hydrophobic matrix inclination certain angle after process, enable drop along the wetting ability track flowing after process, realize drop directed transport on super-hydrophobic matrix.
2. method according to claim 1, is characterized in that, the plasma body that super-hydrophobic matrix surface hydrophilicity-imparting treatment adopts is low pressure plasma or atmospheric pressure plasma.
3. on super-hydrophobic matrix, realize a method for drop orientation transport, it is characterized in that, with the super-hydrophobic matrix of plasma jet process, make super-hydrophobic basic body transforms be water-wetted surface, obtain the wetting ability track of super-hydrophobic matrix surface:
1) when the cross-sectional dimension of plasma jet is greater than required wetting ability track width, mask need be placed on super-hydrophobic matrix surface, plasma jet is had an effect by hollow out position on mask and super-hydrophobic matrix surface, forms selectivity hydrophilicity-imparting treatment;
2) when plasma jet and super hydrophobic surface effect cross-sectional dimension equal required wetting ability track width, do not need mask to assist can to obtain the wetting ability track of desired size; On described mask, the shape of hollow out position is identical with the shape of wetting ability track;
By the super-hydrophobic matrix inclination certain angle after process, enable drop along the wetting ability track flowing after process, realize drop directed transport on super-hydrophobic matrix.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539557.2A CN105566666A (en) | 2014-10-13 | 2014-10-13 | Method for realizing liquid drop directional transportation on super-hydrophobic substrate |
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| CN201410539557.2A CN105566666A (en) | 2014-10-13 | 2014-10-13 | Method for realizing liquid drop directional transportation on super-hydrophobic substrate |
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| CN105566666A true CN105566666A (en) | 2016-05-11 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053869A (en) * | 2016-07-08 | 2016-10-26 | 西北工业大学 | Guiding method for adjusting and controlling mass loss avoidance of liquid drops based on wall surface wettability |
| CN106334663A (en) * | 2016-09-23 | 2017-01-18 | 大连理工大学 | Method for creating high-precision extremely-wet patterns on aluminum matrix |
| CN108251846A (en) * | 2018-01-12 | 2018-07-06 | 大连理工大学 | A kind of method that no mask prepares patterned wettability surface |
| 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 |
| CN109336048A (en) * | 2018-09-03 | 2019-02-15 | 山东科技大学 | A kind of preparation method of the super hydrophobic surface with orientation transportation function |
| CN110218098A (en) * | 2019-04-30 | 2019-09-10 | 湖北大学 | A kind of preparation method of the patterning super lyophoby perforated membrane for liquid orientation transport |
| CN110215942A (en) * | 2019-07-08 | 2019-09-10 | 哈尔滨工业大学 | Special infiltration surface drop directed transport method based on Gradient Effect |
| CN110385531A (en) * | 2019-08-30 | 2019-10-29 | 广州大学 | A method of realizing that water droplet transports in super hydrophilic aluminum alloy surface |
| CN111632632A (en) * | 2020-05-12 | 2020-09-08 | 大连理工大学 | Ridge array structure for directional transportation of liquid drops on high-temperature surface and preparation method thereof |
| CN112268780A (en) * | 2020-10-27 | 2021-01-26 | 中国科学院兰州化学物理研究所 | Preparation method of artificial leaves capable of switching liquid drop movement mode |
| CN112742071A (en) * | 2021-01-13 | 2021-05-04 | 西南科技大学 | Structure for directional transportation and separation of low surface energy microdroplets and preparation method |
| CN114870788A (en) * | 2022-05-20 | 2022-08-09 | 合肥工业大学 | Space constraint and physical and chemical analysis system for insoluble gas and use method thereof |
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| JPH06306199A (en) * | 1993-04-21 | 1994-11-01 | Japan Synthetic Rubber Co Ltd | Surface treatment of polymeric material |
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| JPH06306199A (en) * | 1993-04-21 | 1994-11-01 | Japan Synthetic Rubber Co Ltd | Surface treatment of polymeric material |
| CN103789716A (en) * | 2014-01-19 | 2014-05-14 | 大连理工大学 | Method for modifying surface of metal material by adopting atmospheric-pressure cold plasma jet |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053869A (en) * | 2016-07-08 | 2016-10-26 | 西北工业大学 | Guiding method for adjusting and controlling mass loss avoidance of liquid drops based on wall surface wettability |
| CN106334663A (en) * | 2016-09-23 | 2017-01-18 | 大连理工大学 | Method for creating high-precision extremely-wet patterns on aluminum matrix |
| CN108251846A (en) * | 2018-01-12 | 2018-07-06 | 大连理工大学 | A kind of method that no mask prepares patterned wettability surface |
| 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 |
| CN108627666B (en) * | 2018-05-15 | 2021-12-31 | 西北工业大学 | Liquid drop recessive guiding method based on V-shaped groove |
| CN109336048A (en) * | 2018-09-03 | 2019-02-15 | 山东科技大学 | A kind of preparation method of the super hydrophobic surface with orientation transportation function |
| CN110218098B (en) * | 2019-04-30 | 2021-10-12 | 湖北大学 | Preparation method of patterned super-lyophobic porous membrane for liquid directional transportation |
| CN110218098A (en) * | 2019-04-30 | 2019-09-10 | 湖北大学 | A kind of preparation method of the patterning super lyophoby perforated membrane for liquid orientation transport |
| CN110215942A (en) * | 2019-07-08 | 2019-09-10 | 哈尔滨工业大学 | Special infiltration surface drop directed transport method based on Gradient Effect |
| CN110385531A (en) * | 2019-08-30 | 2019-10-29 | 广州大学 | A method of realizing that water droplet transports in super hydrophilic aluminum alloy surface |
| CN111632632A (en) * | 2020-05-12 | 2020-09-08 | 大连理工大学 | Ridge array structure for directional transportation of liquid drops on high-temperature surface and preparation method thereof |
| CN112268780A (en) * | 2020-10-27 | 2021-01-26 | 中国科学院兰州化学物理研究所 | Preparation method of artificial leaves capable of switching liquid drop movement mode |
| CN112268780B (en) * | 2020-10-27 | 2021-07-20 | 中国科学院兰州化学物理研究所 | Preparation method of artificial leaves capable of switching liquid drop movement mode |
| CN112742071A (en) * | 2021-01-13 | 2021-05-04 | 西南科技大学 | Structure for directional transportation and separation of low surface energy microdroplets and preparation method |
| CN114870788A (en) * | 2022-05-20 | 2022-08-09 | 合肥工业大学 | Space constraint and physical and chemical analysis system for insoluble gas and use method thereof |
| CN114870788B (en) * | 2022-05-20 | 2024-01-16 | 合肥工业大学 | Space constraint and physicochemical analysis system of insoluble gas and application method thereof |
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