CN105863985B - Magnetic response compound interface driving liquid motion device and its preparation method and application - Google Patents
Magnetic response compound interface driving liquid motion device and its preparation method and application Download PDFInfo
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- CN105863985B CN105863985B CN201610252489.0A CN201610252489A CN105863985B CN 105863985 B CN105863985 B CN 105863985B CN 201610252489 A CN201610252489 A CN 201610252489A CN 105863985 B CN105863985 B CN 105863985B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/006—Micropumps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
- H01F1/445—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a compound, e.g. Fe3O4
Abstract
The invention discloses a kind of magnetic response compound interface to drive liquid motion device, including magnetic response compound interface, corresponding magnetic field, liquid；Wherein, the magnetic response compound interface is made up of micro-nano array structure film and magnetic fluid；The liquid and the magnetic fluid are immiscible；The micro-nano array structure film be micron to micro-meter scale, micron to nanoscale, nanometer to nanoscale array structure, be one kind in club shaped structure, tubular structure, cavernous structure or nutty structure；The one kind of the material of the micro-nano array structure film in zinc oxide, titanium oxide, nickel foam, foam copper, Woelm Alumina, silicon or silica dioxide granule；The magnetic fluid is water-based magnetic fluid or oil-based magnetic fluids.The magnetic response compound interface driving liquid motion device of the present invention, with be easy to construct, fast response time, lasting driving, convenient control, the advantages of movement velocity and the direction of motion can be controlled by external magnetic field, magnetic field and compound interface coordinated drive drop directed movement can be passed through.
Description
Technical field
The present invention relates to External field response compound interface to drive liquid motion technical field, more particularly to field drives liquid
Sports apparatus and preparation method and application.
Background technology
Gradient surface wellability, due to its caused surface tension gradient and laplace pressure, in intelligent surface liquid
Very important effect is played in transporting.However, in this wellability gradient surface, due to its constant chemical composition and knot
Structure, it is impossible to be continuously adjusted in the distance range of needs and (refer to bibliography [1]:S.Daniel,M.K.Chaudhury,
J.C.Chen,Science 2001,291,633；Bibliography [2]:S.W.Lee,P.E.Laibinis,
J.Am.Chem.Soc.2000,122,5395；Bibliography [3]:M.K.Chaudhury,G.M.Whitesides,Science
1992,256,1539.；Bibliography [4]:F.Lugli,G.Fioravanti,D.Pattini,L.Pasquali,
M.Montecchi,D.Gentili,M.Murgia,Z.Hemmatian,F.Zerbetto,Adv.Func.Mater.2013,23,
5543；Bibliography [5]:J.Ju,K.Xiao,X.Yao,H.Bai,L.Jiang,Adv.Mater.2013,25,5937).Cause
This, the motion of surface liquid is influenceed very big by viscous force.Intelligent response material is in outfield such as light, electricity, heat, gravitation and machine
Switch wellability, which can be obtained, under the stimulations such as tool is flexible (refers to bibliography [6]:K.Ichimura,S.K.Oh,
M.Nakagawa,Science 2000,288,1624；Bibliography [7]:X.Yao,J.Ju,S.Yang,J.J.Wang,
L.Jiang,Adv.Mater.2014,26,1895；Bibliography [8]:M.J.Liu,F.-Q.Nie,Z.X.Wei,Y.L.Song,
L.Jiang,Langmuir 2010,26,3993；Bibliography [9]:X.Yao,Y.Hu,A.Grinthal,T.-S.Wong,
L.Mahadevan,J.Aizenberg,Nat.Mater.2013,12,529；Bibliography [10]:Y.M.Zheng,X.F.Gao,
L.Jiang,Soft Matter 2007,3,178；Bibliography [11]:M.W.J.Prins,W.J.J.Welters,
J.W.Weekamp, Science 2001,291,277.), but because response speed is slow, liquid motion direction and speed can not
Control, is limited by very large in the application field of liquid driven.How a kind of quick response, movement velocity and direction are obtained all
Controllable compound interface has very big challenge.
The content of the invention
It is an object of the invention to provide a kind of magnetic response compound interface to drive liquid motion device.
It is a further object of the present invention to provide the application of magnetic response compound interface driving liquid motion device.
Another object of the present invention is a kind of preparation method for providing magnetic response compound interface.
To achieve the above object, the present invention uses following technical scheme：
A kind of magnetic response compound interface drives liquid motion device, including magnetic response compound interface, corresponding magnetic field, liquid
Body；
Wherein, the magnetic response compound interface is made up of micro-nano array structure film and magnetic fluid；The liquid with it is described
Magnetic fluid is immiscible；
The micro-nano array structure film is micron to micro-meter scale, micron to nanoscale, nanometer to nanoscale
Array structure, it is one kind in club shaped structure, tubular structure, cavernous structure or nutty structure；The micro-nano array structure
The one kind of the material of film in zinc oxide, titanium oxide, nickel foam, foam copper, Woelm Alumina, silicon or silica dioxide granule；
The magnetic fluid is water-based magnetic fluid or oil-based magnetic fluids.
Magnetic response compound interface driving liquid motion device as described above, it is preferable that the oil-based magnetic fluids it is oily
Species is one kind in silicone oil, kerosene, diesel oil, silicon fluoride, PFPE, atoleine or mineral oil.
Magnetic response compound interface driving liquid motion device as described above, it is preferable that the magnetic field intensity in the magnetic field is 0
~1T magnetic field.
Magnetic response compound interface driving liquid motion device as described above, it is preferable that the magnetic fields are in magnetic response
The lower section of compound interface.
Magnetic response compound interface driving liquid motion device as described above, it is preferable that in the club shaped structure, rod it is straight
Footpath is 50nm~200 μm, and the length of rod is 1 μm~500 μm；The caliber of the tubular structure middle pipe is 200nm~200 μm, pipe
Length be 1 μm~500 μm；The aperture of the cavernous structure mesopore is 200nm~500 μm, and the depth in hole is 1 μm~3mm；Institute
State particle in nutty structure a diameter of 1 μm~200 μm, particle thickness are 1 μm~500 μm.
The application of magnetic response compound interface driving liquid motion device as described above：With magnetic response compound interface in magnetic
Field intensity is that the magnetic fluid is transported in the micro-nano array structure film under the influence of a magnetic field under 0~1T magnetic fields
It is dynamic to assemble, 1~500 μm of height and 1~500 μm wide of taper bulge-structure array are formed, and the intensity in the magnetic field is got over
Greatly, the taper array of protrusions structure is bigger；After being removed when the magnetic field, magnetic fluid structure disappears, and magnetic fluid returns to nanometer
In array.When applying 0~1T gradient magnetics to magnetic response compound interface；The big region taper bulge-structure of magnetic field intensity is big；
It is and small in the small region taper bulge-structure of magnetic field intensity.So in the presence of gradient magnetic, interface bulge-structure from 1~
500 μm of height and the distribution of 1~500 μm wide of taper size gradient.
It is above-mentioned be added dropwise with magnetic response compound interface with magnetic liquid immiscible drop when, the drop is on the boundary
The contact angle in face increases with the increase of interfacial structure, i.e., increases with the increase of magnetic field intensity.Therefore, it is distributed in gradient
Magnetic field under, immiscible liquid-drop contact angle distribution gradient on interface is that is, different in same drop both ends contact angle, interface
The big end thereof contacts angle of structure is larger, and the small end thereof contacts angle of interfacial structure is smaller, is thus formed and soaked at same drop both ends
Lubricant nature difference, produces internal pressure, and the power causes drop to have the motion from the larger one end of contact angle to the smaller one end of contact angle
Trend.When being moved in magnetic field, interface drop can be moved quickly along the direction of motion in magnetic field, and the movement velocity and magnetic of drop
The movement velocity of field is consistent, and when magnetic direction changes, the motion of drop also can be with the direction change in magnetic field on interface；
The scope that described liquid-drop contact angle changes is 1 degree~110 degree；
The response time that described interface drop can be moved quickly along the direction of motion in magnetic field is less than 0.1s；
Described interface drop is 0~1m/s with Movement in Magnetic Field speed.
The application of magnetic response compound interface driving liquid motion device as described above：The magnetic response compound interface is driven
Hydrodynamic body sports apparatus is applied to the energy, biotechnology, microsensor, microfluidic control technology, with described in gradient
Under magnetic fields, drop directed movement on the magnetic response compound interface.
Application as described above, it is preferable that the magnetic response compound interface is applied in surface or microchannel as pump
The liquid transporting.
The drop of the device surface can move along magnetic field gradient directions, this directed movement mainly by drop both ends not
The surface tension driving of balance, the especially non-contact control of micro fluid dynamcis that can be applied to as pump in surface or microchannel
The liquid transport of system, there is significant application value in fields such as the energy, biotechnology, microsensor, microfluidic control technologies；
Wherein, described microchannel diameter is 10 μm~3mm.
The magnetic response compound interface driving liquid motion device of the present invention is prepared by following methods：
Described magnetic fluid is added drop-wise in described micro-nano array structure film and magnetic response compound interface is prepared；
The liquid immiscible with selected magnetic fluid is added drop-wise on magnetic response compound interface,
Using magnetic response compound interface lower section magnetic fields in compound interface, you can realize to magnetic response compound interface
The control of the liquid drop movement.
Preparation method described above, it is preferable that when the magnetic fluid is water-based magnetic fluid, the water-based magnetic fluid is water
Or the solution using water as solvent, the liquid are silicone oil, kerosene, diesel oil, silicon fluoride, PFPE, atoleine or mineral oil；
When the magnetic fluid is oil-based magnetic fluids, the oil of the oil-based magnetic fluids is silicone oil, kerosene, diesel oil, silicon fluoride,
PFPE, atoleine or mineral oil, the liquid are water or the solution using water as solvent.
Further, in the club shaped structure, a diameter of 50nm~200 μm of rod, the length of rod is 1 μm~500 μm；Institute
The caliber for stating tubular structure middle pipe is 200nm~200 μm, and the length of pipe is 1 μm~500 μm；The hole of the cavernous structure mesopore
Footpath is 200nm~500 μm, and the depth in hole is 1 μm~3mm；A diameter of 1 μm~200 μm of particle in the nutty structure,
Granulosa thickness is 1 μm~500 μm.
The advantages of magnetic response compound interface driving liquid motion device of the present invention：Be easy to construct, fast response time,
The advantages of lasting driving, convenience are controlled, and movement velocity and the direction of motion can be controlled by external magnetic field, can pass through magnetic field and compound boundary
Face coordinated drive drop directed movement.
Brief description of the drawings
Fig. 1 is magnetic response compound interface interface microstructure change schematic diagram before and after magnetic field is applied.
Fig. 2 is the change schematic diagram of magnetic response compound interface interface drop wellability before and after magnetic field is applied.
Fig. 3 is that magnetic response compound interface drives drop directed movement mechanism schematic diagram under Actions of Gradient Magnetic Field.
Fig. 4 is that magnetic response compound interface drives microchannel drop directed movement mechanism schematic diagram under Actions of Gradient Magnetic Field.
Wherein：1. magnetic response compound interface；2. externally-applied magnetic field；3. with the immiscible liquid of magnetic fluid；11. micro-nano battle array
Array structure film；12. magnetic fluid
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further illustrated.
Embodiment 1
Magnetic response compound interface driving liquid motion device includes magnetic response compound interface, magnetic field and with the mutual not phase of magnetic fluid
Molten liquid.As shown in Figure 1a, magnetic fluid 12 is added drop-wise in micro-nano array structure film 11 and the compound boundary of magnetic response is prepared
Face 1.The micro-nano array structure film be micron to micro-meter scale, micron to nanoscale, nanometer to nanoscale array
Structure, it is one kind in club shaped structure, tubular structure, cavernous structure or nutty structure；The material of micro-nano array structure film
Zinc oxide, titanium oxide, nickel foam, foam copper, Woelm Alumina, silicon or earth silicon material can be selected；Magnetic fluid is optional water base
Magnetic fluid or oil-based magnetic fluids.
Further, in the club shaped structure, the diameter of rod is between 50nm to 200 μm, and the length of rod is at 1 μm to 500 μm
Between；The caliber of the tubular structure middle pipe is between 200nm to 200 μm, and the length of pipe is between 1 μm to 500 μm；The hole
The aperture of shape structure mesoporous is between 200nm to 500 μm, and the depth in hole is at 1 μm between 3mm；In the nutty structure
Grain it is a diameter of between 1 μm to 200 μm, between particle thickness is 1 μm to 500 μm, above-mentioned number range is including both ends
Including numerical value；
The described liquid immiscible with selected magnetic fluid, i.e., when selecting oil-based magnetic fluids liquid be selected from water and with
Water is the solution of solvent；When selecting water-based magnetic fluid liquid be selected from oil, as silicone oil, kerosene, diesel oil, silicon fluoride, PFPE,
Atoleine, mineral oil etc. and the immiscible liquid of water.
Apply magnetic field 2 on magnetic response compound interface 1, it is possible to achieve the interfacial structure assembling under magnetic fields, such as Fig. 1 b
It is shown；The liquid 3 immiscible with selected magnetic fluid 12 is added drop-wise on magnetic response compound interface 1, as shown in Figure 2 c；Using magnetic
The magnetic field 2 for responding the lower section of compound interface acts on magnetic response compound interface 1, as shown in Figure 2 d, you can realizes to compound interface
The control of the wellability of drop 3, i.e. contact angle of the drop at the interface increase with the increase of interfacial structure, that is to say, that can be with
The increase of magnetic field intensity and increase.
With magnetic response compound interface in the case where magnetic field intensity is 0~1T magnetic fields, magnetic fluid can be in the effect in magnetic field
Move and assemble in nano-array, form 1~500 μm of height and 1~500 μm wide of taper bulge-structure array, and magnetic
Field intensity is bigger, and array of protrusions structure is bigger.As shown in Figure 2 d, after being removed when magnetic field, magnetic fluid structure disappears, and magnetic fluid returns
Return in nano-array.When applying 0~1T gradient magnetics to magnetic response compound interface, the big region bulge-structure of magnetic field intensity
Greatly.It is and small in the small region bulge-structure of magnetic field intensity.So in the presence of gradient magnetic, interface bulge-structure is from 1~500
μm height and the distribution of 1~500 μm wide of taper size gradient.
As shown in figure 3, it is above-mentioned be added dropwise with magnetic response compound interface with magnetic liquid immiscible drop when, it is described
Contact angle of the drop at the interface increases with the increase of interfacial structure, i.e., increases with the increase of magnetic field intensity.Big
Under the distribution in small homogeneous magnetic field, the contact angle θ at immiscible drop both ends on interface0Size is identical, in gradient distribution
Under magnetic field, immiscible liquid-drop contact angle distribution gradient on interface, the i.e. contact angle at same drop both ends are different, interface
The big end thereof contacts angle θ of structure1It is larger, the small end thereof contacts angle θ of interfacial structure2It is smaller, thus formed at same drop both ends
Sex differernce is infiltrated, produces internal pressure, the power causes drop to have the fortune from the larger one end of contact angle to the smaller one end of contact angle
Dynamic trend.When being moved in magnetic field, interface drop can be moved quickly along the direction of motion in magnetic field, and the movement velocity of drop with
The movement velocity in magnetic field is consistent, and when magnetic direction changes, the motion of drop also can be with the direction change in magnetic field on interface
Change.
Wherein, the scope that above-mentioned liquid-drop contact angle changes is 1 degree~110 degree；
The response time that above-mentioned interface drop can be moved quickly along the direction of motion in magnetic field is less than 0.1s；
Above-mentioned interface drop is 0~1m/s with the speed of Movement in Magnetic Field.
The drop of the device surface can move along magnetic field gradient directions, this directed movement mainly by drop both ends not
The surface tension driving of balance, the especially non-contact control of micro fluid dynamcis that can be applied to as pump in surface or microchannel
The liquid transport of system, there is significant application value in fields such as the energy, biotechnology, microsensor, microfluidic control technologies.
Described microchannel diameter is 10 μm~3mm.
As shown in figure 4, when constructing this magnetic response compound interface in microchannel, the magnetic response compound interface is in magnetic field
The lower micro fluid dynamcis and liquid transport that can be used for as pump in microchannel of effect, in the energy, biotechnology, micro sensing
The fields such as device, microfluidic control technology have significant application value.B is the enlarged drawing at A in Fig. 4.
Specifically, the micro-nano array structure film is nanometic zinc oxide rod array structure, nanorod diameter 50nm, rod
Length is 1 μm, and magnetic fluid uses Polydimethylsiloxane--based Ferrofluid, and the immiscible liquid being added dropwise on interface is water, when not applying magnetic field, boundary
State of sprawling is presented in face drop, and contact angle is 5 degree, and when applying 10mT magnetic field, interface bulge-structure is about 10 μm of height and 30 μ
Taper size gradient distribution wide m.Liquid-drop contact angle is changed into 70 degree, and when applying 0-100mT gradient magnetic, water droplet can be with
The motion in magnetic field and speed of doing exercises is 1m/s.For a diameter of 3 μm of microchannel, this magnetic response compound interface can conduct
Pump is applied to the liquid transport in microchannel.
Embodiment 2
Other steps are the same as embodiment 1.
Described micro-nano array structure film is silicon nanorod array structure, and a diameter of 200 μm of rod, rod length is 500 μm.
Described magnetic fluid is selected from kerosene based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying magnetic field
When, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 200mT magnetic field, interface bulge-structure is about 200 μm
High and 200 μm wide taper size gradients are distributed.Liquid-drop contact angle is changed into 110 degree, when applying 0-500mT gradient magnetic,
The water droplet speed that can be done exercises with the motion in magnetic field is 1m/s.For a diameter of 3mm microchannel, the compound boundary of this magnetic response
Face can be applied to the liquid transport in microchannel as pump.
Embodiment 3
Other steps are the same as embodiment 1.
Described micro-nano array structure film is titanium oxide nanotube array structure, and the caliber of nanotube is 200nm, pipe range
Spend for 1 μm.
Described magnetic fluid is selected from diesel oil based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying magnetic field
When, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 10mT magnetic field, interface bulge-structure is about 10 μm of height
Taper size gradient with 30 μm wide is distributed.Liquid-drop contact angle is changed into 70 degree, when applying 0-100mT gradient magnetic, water droplet
The speed that can be done exercises with the motion in magnetic field is 1m/s.For a diameter of 3mm microchannel, this magnetic response compound interface can
Using the liquid transport being applied to as pump in microchannel.
Embodiment 4
Other steps are the same as embodiment 1.
Described micro-nano array structure film is titanium oxide nanotube array structure, and the caliber of nanotube is 200 μm, pipe
Length is 500 μm.
Described magnetic fluid is selected from silicon fluoride based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying magnetic
During field, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 200mT magnetic field, interface bulge-structure is about 200
μm height and the distribution of 200 μm wide of taper size gradient.Liquid-drop contact angle is changed into 110 degree, when the gradient magnetic for applying 0-500mT
When, the water droplet speed that can be done exercises with the motion in magnetic field is 1m/s.For a diameter of 3mm microchannel, this magnetic response is answered
Close the liquid transport that interface can be applied to as pump in microchannel.
Embodiment 5
Other steps are the same as embodiment 1.
Described micro-nano array structure film is nickel foam, and the aperture of micron openings is 500 μm, and the depth in hole is 3mm.
Described magnetic fluid is selected from PFPE based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying
During magnetic field, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 1T magnetic field, interface bulge-structure is about 500 μ
The high taper size gradients with 500 μm wide of m are distributed.Liquid-drop contact angle is changed into 110 degree, when applying 0-1T gradient magnetic, water
It is 1m/s to drip the speed that can be done exercises with the motion in magnetic field.For a diameter of 3mm microchannel, this magnetic response compound interface
The liquid transport that can be applied to as pump in microchannel.
Embodiment 6
Other steps are the same as embodiment 1.
Described micro-nano array structure film is foam copper, and micron pore size is 500 μm, and the depth in hole is 3mm.
Described magnetic fluid is selected from mineral oil-based magnetic fluids, and the immiscible liquid being added dropwise on interface is water, when not applying magnetic
During field, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 1T magnetic field, interface bulge-structure is about 500 μm
High and 500 μm wide taper size gradients are distributed.Liquid-drop contact angle is changed into 110 degree, when applying 0-1T gradient magnetic, water droplet
The speed that can be done exercises with the motion in magnetic field is 1m/s.For a diameter of 3mm microchannel, this magnetic response compound interface can
Using the liquid transport being applied to as pump in microchannel.
Embodiment 7
Other steps are the same as embodiment 1.
Described micro-nano array structure film is Woelm Alumina, and aperture 200nm, the depth in hole is 1 μm.
Described magnetic fluid is selected from atoleine based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying
During magnetic field, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 5mT magnetic field, interface bulge-structure is about 2 μm
High and 3 μm wide taper size gradients are distributed.Liquid-drop contact angle is changed into 20 degree, when applying 0-5mT gradient magnetic, water droplet meeting
Speed of being done exercises with the motion in magnetic field is 1m/s.For a diameter of 10 μm of microchannel, this magnetic response compound interface can
Using the liquid transport being applied to as pump in microchannel.
Embodiment 8
Other steps are the same as embodiment 1.
Described micro-nano array structure film is silica dioxide granule, and particle footpath is 1 μm, and the thickness of membrana granulosa is 1 μm.
Described magnetic fluid is selected from atoleine based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying
During magnetic field, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 5mT magnetic field, interface bulge-structure is about 2 μm
High and 3 μm wide taper size gradients are distributed.Liquid-drop contact angle is changed into 20 degree, when applying 0-5mT gradient magnetic, water droplet meeting
Speed of being done exercises with the motion in magnetic field is 1m/s.For a diameter of 10 μm of microchannel, this magnetic response compound interface can
Using the liquid transport being applied to as pump in microchannel.
Embodiment 9
Other steps are the same as embodiment 1.
Described micro-nano array structure film is silica dioxide granule, and particle footpath is 200 μm, and the thickness of membrana granulosa is 500 μ
m。
Described magnetic fluid is selected from atoleine based magnetofluid, and the immiscible liquid being added dropwise on interface is water, when not applying
During magnetic field, state of sprawling is presented in interface drop, and contact angle is 5 degree, and when applying 200mT magnetic field, interface bulge-structure is about
200 μm of height and the distribution of 200 μm wide of taper size gradient.Liquid-drop contact angle is changed into 100 degree, when the gradient magnetic for applying 0-300mT
When, the water droplet speed that can be done exercises with the motion in magnetic field is 1m/s.For a diameter of 10 μm of microchannel, this magnetic response
Compound interface can be applied to the liquid transport in microchannel as pump.
Embodiment 10
Other steps are the same as embodiment 1.
Described micro-nano array structure film is Woelm Alumina, and aperture 200nm, the depth in hole is 1 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is silicone oil, when not applying magnetic field
When, interface drop presents and sprawls state, and contact angle is 1 degree, when applying 5mT magnetic field, interface bulge-structure be about 2 μm of height with
3 μm wide of taper size gradient distribution.Liquid-drop contact angle is changed into 10 degree, and when applying 0-5mT gradient magnetic, silicone oil drop can be with
The motion in magnetic field and speed of doing exercises is 1m/s.For a diameter of 10 μm of microchannel, this magnetic response compound interface can be with
It is applied to the liquid transport in microchannel as pump.
Embodiment 11
Other steps are the same as embodiment 1.
Described micro-nano array structure film is Woelm Alumina, and aperture 200nm, the depth in hole is 1 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is kerosene, when not applying magnetic field
When, interface drop presents and sprawls state, and contact angle is 1 degree, when applying 5mT magnetic field, interface bulge-structure be about 2 μm of height with
3 μm wide of taper size gradient distribution.Liquid-drop contact angle is changed into 10 degree, and when applying 0-5mT gradient magnetic, kerosene drop can be with
The motion in magnetic field and speed of doing exercises is 1m/s.For a diameter of 10 μm of microchannel, this magnetic response compound interface can be with
It is applied to the liquid transport in microchannel as pump.
Embodiment 12
Other steps are the same as embodiment 1.
Described micro-nano array structure film is titanium oxide nanotube array structure, and its nanotube caliber is 200nm, pipe range
Spend for 1 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is diesel oil, when not applying magnetic field
When, state of sprawling is presented in interface drop, and contact angle is 1 degree, and when applying 10mT magnetic field, interface bulge-structure is about 10 μm of height
Taper size gradient with 30 μm wide is distributed.Liquid-drop contact angle is changed into 20 degree, when applying 0-100mT gradient magnetic, oil droplet
The speed that can be done exercises with the motion in magnetic field is 1m/s.For a diameter of 3mm microchannel, this magnetic response compound interface can
Using the liquid transport being applied to as pump in microchannel.
Embodiment 13
Other steps are the same as embodiment 1.
Described micro-nano array structure film is titanium oxide nanotube array structure, and its nanotube caliber is 200 μm, pipe range
Spend for 500 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is silicon fluoride, when not applying magnetic
During field, state of sprawling is presented in interface drop, and contact angle is 2 degree, and when applying 200mT magnetic field, interface bulge-structure is about 200
μm height and the distribution of 200 μm wide of taper size gradient.Liquid-drop contact angle is changed into 80 degree, when applying 0-500mT gradient magnetic,
It is 1m/s that silicon fluoride, which drips the speed that can be done exercises with the motion in magnetic field,.For a diameter of 3mm microchannel, this magnetic response is answered
Close the liquid transport that interface can be applied to as pump in microchannel.
Embodiment 14
Described micro-nano array structure film is nanometic zinc oxide rod array structure, and its nanorod diameter is 50nm, and rod is grown
Spend for 1 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is PFPE, when not applying
During magnetic field, state of sprawling is presented in interface drop, and contact angle is 2 degree, and when applying 10mT magnetic field, interface bulge-structure is about
10 μm of height and the distribution of 30 μm wide of taper size gradient.Liquid-drop contact angle is changed into 20 degree, when the gradient magnetic for applying 0-100mT
When, it is 1m/s that PFPE, which drips the speed that can be done exercises with the motion in magnetic field,.For a diameter of 3 μm of microchannel, this magnetic
Respond the liquid transport that compound interface can be applied to as pump in microchannel.
Embodiment 15
Other steps are the same as embodiment 1.
Described micro-nano array structure film is Woelm Alumina, and its aperture is 200nm, and the depth in hole is 1 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is atoleine, when not applying
During magnetic field, state of sprawling is presented in interface drop, and contact angle is 1 degree, and when applying 5mT magnetic field, interface bulge-structure is about 2 μm
High and 3 μm wide taper size gradients are distributed.Liquid-drop contact angle is changed into 10 degree, when applying 0-5mT gradient magnetic, liquid stone
It is 1m/s that wax, which drips the speed that can be done exercises with the motion in magnetic field,.It is compound for a diameter of 10 μm of microchannel, this magnetic response
Interface can be applied to the liquid transport in microchannel as pump.
Embodiment 16
Other steps are the same as embodiment 1.
Described micro-nano array structure film is titanium oxide nanotube array structure, and its nanotube caliber is 200nm, pipe range
Spend for 1 μm.
Described magnetic fluid is selected from water-based magnetic fluid, and the immiscible liquid being added dropwise on interface is mineral oil, when not applying magnetic
During field, state of sprawling is presented in interface drop, and contact angle is 1 degree, and when applying 10mT magnetic field, interface bulge-structure is about 10 μm
High and 30 μm wide taper size gradients are distributed.Liquid-drop contact angle is changed into 20 degree, when applying 0-100mT gradient magnetic, ore deposit
The thing oil droplet speed that can be done exercises with the motion in magnetic field is 1m/s.It is compound for a diameter of 3mm microchannel, this magnetic response
Interface can be applied to the liquid transport in microchannel as pump.
The above described is only a preferred embodiment of the present invention, being not the limitation that other forms are done to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (8)
1. a kind of magnetic response compound interface drives liquid motion device, it is characterised in that including magnetic response compound interface, accordingly
Magnetic field, liquid；
Wherein, the magnetic response compound interface is made up of micro-nano array structure film and magnetic fluid；The liquid and the magnetic current
Body is immiscible；
The micro-nano array structure film be micron to micro-meter scale, micron to nanoscale, nanometer to nanoscale array
Structure, it is one kind in club shaped structure, tubular structure, cavernous structure or nutty structure；The micro-nano array structure film
The one kind of material in zinc oxide, titanium oxide, nickel foam, foam copper, Woelm Alumina, silicon or silica dioxide granule；
In the club shaped structure, a diameter of 50nm~200 μm of rod, the length of rod is 1 μm~500 μm；In the tubular structure
The caliber of pipe is 200nm~200 μm, and the length of pipe is 1 μm~500 μm；The aperture of the cavernous structure mesopore be 200nm~
500 μm, the depth in hole is 1 μm~3mm；A diameter of 1 μm~200 μm of particle in the nutty structure, particle thickness are 1 μm
~500 μm；
The magnetic fluid is water-based magnetic fluid or oil-based magnetic fluids.
2. magnetic response compound interface as claimed in claim 1 drives liquid motion device, it is characterised in that the oil base magnetic current
The oily species of body is one kind in silicone oil, kerosene, diesel oil, silicon fluoride, PFPE, atoleine or mineral oil.
3. magnetic response compound interface as claimed in claim 1 drives liquid motion device, it is characterised in that the magnetic in the magnetic field
Field intensity is 0~1T magnetic field, and the magnetic fields are in the lower section of magnetic response compound interface.
4. the application of magnetic response compound interface driving liquid motion device as claimed in claim 1：The magnetic response is compound
Interface driving liquid motion device is applied to the energy, biotechnology, microsensor, microfluidic control technology, with gradient
The magnetic fields under, liquid directed movement on the magnetic response compound interface.
5. the application of magnetic response compound interface driving liquid motion device as claimed in claim 1：Characterized in that, the magnetic rings
The liquid transporting for answering compound interface to be applied to as pump in surface or microchannel.
6. the application of magnetic response compound interface driving liquid motion device as claimed in claim 5：Characterized in that, described is micro-
Channel diameter is 10 μm~3mm.
7. the preparation method of magnetic response compound interface as claimed in claim 1 driving liquid motion device, it is characterised in that by with
Lower section method is prepared：
Described magnetic fluid is added drop-wise in described micro-nano array structure film and magnetic response compound interface is prepared；
The liquid immiscible with the magnetic fluid is added drop-wise on the magnetic response compound interface of above-mentioned preparation,
Using magnetic response compound interface lower section magnetic fields in compound interface, you can realize to described in magnetic response compound interface
The control of liquid motion.
8. preparation method as claimed in claim 7, it is characterised in that when the magnetic fluid is water-based magnetic fluid, the water
Based magnetofluid is water or the solution using water as solvent, and the liquid is silicone oil, kerosene, diesel oil, silicon fluoride, PFPE, liquid
Paraffin or mineral oil；
When the magnetic fluid is oil-based magnetic fluids, the oil of the oil-based magnetic fluids is silicone oil, kerosene, diesel oil, silicon fluoride, perfluor
Polyethers, atoleine or mineral oil, the liquid are water or the solution using water as solvent.
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| CN109590039B (en) * | 2019-01-18 | 2020-12-15 | 京东方科技集团股份有限公司 | Microfluidic assembly, microfluidic chip and preparation method thereof |
| CN110069168B (en) * | 2019-05-05 | 2022-09-30 | 京东方科技集团股份有限公司 | Microfluidic device, operating method for microfluidic device and control device |
| CN110523451B (en) * | 2019-09-30 | 2021-10-22 | 王殿宇 | Preparation method of magnetic control micro-droplet reactor based on super-lubrication interface |
| CN110985333B (en) * | 2019-12-03 | 2022-03-22 | 广州大学 | Reversible micropump based on electrowetting phenomenon |
| CN111692209B (en) * | 2020-05-25 | 2021-06-15 | 南京航空航天大学 | Magnetic fluid controllable support micro platform based on extreme infiltration interface and manufacturing method |
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