CN209432679U - Measure the measuring device of adhesion strength between solid liquid interface under electric field - Google Patents
Measure the measuring device of adhesion strength between solid liquid interface under electric field Download PDFInfo
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- CN209432679U CN209432679U CN201821886299.5U CN201821886299U CN209432679U CN 209432679 U CN209432679 U CN 209432679U CN 201821886299 U CN201821886299 U CN 201821886299U CN 209432679 U CN209432679 U CN 209432679U
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Abstract
The utility model discloses the measuring devices of adhesion strength between solid liquid interface under a kind of measurement electric field, comprising: transparent plastic operation cabinet, horizontal base, laser sensor, electricity driving displacement platform, cantilever beam, high speed camera, support frame, power supply and data control processing terminal.In measurement process, with the slow movement of electricity driving displacement platform, due to the effect of cantilever beam and the adhesion strength of drop, cantilever beam deforms, the specific value that cantilever beam deformation in experiment is recorded by laser sensor, can calculate the adhesion strength under electric field between solid-liquid.Meanwhile high-speed camera shoots whole experiment process, records upper and lower surface contact angle and the variation of contact area of drop.The measuring system has the characteristics that easy to operate, low in cost, applied widely, measurement accuracy is high, is well positioned to meet the requirement of adhesion strength between solid liquid interface under measurement electric field.
Description
Technical field
The utility model relates to the measuring devices to solid liquid interface adhesion strength under a kind of measurement electric field, and in particular to utilization
The micro-strain of laser measurement cantilever beam is calculated solid under electric field by the relationship between cantilever beam deformation and solid liquid interface behavior
Liquid interfacial adhesion.
Background technique
Solid liquid interface behavior has the function of particularly important in production and living.It, can be by studying solid liquid interface behavior
Realize the function such as anti-pollution, freezing, anti-adhesive, automatically cleaning, absorption in the fields such as space flight and aviation, shipbuilding, weaving, building, environmental protection
Energy.Therefore, research solid liquid interface behavior can not only promote the development of basic science, moreover it is possible to play greatly to the raising of scientific and technological level
Facilitation.With the continuous development of science and technology with the expansion of the market demand, active control solid liquid interface behavior had become
Following development trend and research hotspot.Early-stage study, which mainly passes through, changes solid or drop property with meet demand, such as passes through
Change solid liquid interface behavior, the surface of solids is made to realize that meet the requirements, it is solid to belong to quasi-static control for super hydrophilic or super-hydrophobic state
Liquid interface behavior.With automation and information-based development, it is imperative that dynamic controls solid liquid interface behavior.Actively by voltage
Controlling solid liquid interface behavior is a kind of mode being most widely used in various active control modes.Miniflow is such as controlled by voltage
Body realizes the functions such as separation, merging and the transport of microfluid, obtains extensively in fields such as analytical chemistry, biomedicine, food
Using.However, the solid liquid interface row with microfluidic control integration of equipments, the further development of micromation, on micro-scale
For the more complicated of change, strong influence is generated to stability, the reliability of system, it has also become microfluidic control is walked from laboratory
To the technical bottleneck of application.Therefore, the solid liquid interface behavior under electric field is furtherd investigate into the hot and difficult issue of current research.
Solid liquid interface adhesion strength is the most important active force of solid liquid interface, plays leading role to solid liquid interface behavior.Mesh
Before, the solid liquid interface behavior under micro-scale is set usually using the inclination scientific researches such as panel assembly and atomic force microscope, surface force apparatus
It is standby that adhesion strength is studied.Inclination panel assembly mainly passes through movement rule of the observation drop under gravity on hang plate
Rule, is obtained by calculation solid liquid interface adhesion strength.This method is easy to operate, and data are intuitive, but measurement accuracy is very low, the liquid of test
Drop is limited by various factors, and such as drop size reduces, solid liquid interface adhesion strength is excessive, and drop will not be transported in hang plate
It is dynamic, it will lead to test and be unable to complete.Therefore, when drop is in micro-scale, atomic force microscope, surface force apparatus are generallyd use
Equal precision instruments test the adhesion strength of solid liquid interface.The principle of this quasi-instrument is that contact is gone to cover by a miniature probe
It is stamped the surface of solids of moisture film, electric signal when being contacting and separating by probe and the surface of solids reflects the adherency row of solid liquid interface
For.The data that this measurement method obtains are accurate, but data reaction is not complete solid liquid interface behavior, but solid-liquid-
Gu a kind of coupling behavior between three-phase, this has larger difference with actual condition.In addition, atomic force microscope, surface force apparatus etc.
Belong to precision instrument, high requirement is proposed to operator, experimental enviroment, test process, test specimen etc., it is small
Changing factor will cause very big experimental error.Moreover, the solid liquid interface adhesion strength measured under electric field needs to introduce electric field
Power and liquid phase environment, in this process can lowering apparatus measuring accuracy and may cause instrument damage.It would therefore be highly desirable to develop
It is a kind of to operate that convenient, measurement accuracy is high, can be suitably used for electric field and the method and apparatus of liquid phase environment, for accurate quickly measurement
Adhesion strength under electric field between solid liquid interface.
Utility model content
One purpose of the utility model is to solve at least the above problems and/or defect, and provide and at least will be described later
The advantages of.
In order to realize these purposes and other advantages according to the present utility model, solid-liquid circle under a kind of measurement electric field is provided
The measuring device of adhesion strength between face, comprising:
Transparent plastic operation cabinet；
Horizontal base is arranged in transparent plastic operation cabinet；
Electricity driving displacement platform is vertically arranged on horizontal base；
Horizontal copper sheet is arranged on horizontal base；The top bond medium of the horizontal copper sheet powers on wetting criteria reality
Test sample；Wherein, drop is added dropwise on electrowetting on dielectric standard test sample；
L-type cantilever beam, one end are connected on the slipping block of electricity driving displacement platform, and the other end is vertically oriented to medium and powers on profit
Wet standard test sample and make the vertical end of L-type cantilever beam and the upper-end contact of drop by the movement of electricity driving displacement platform；
Laser sensor, by support frame be vertically arranged in electrowetting on dielectric standard test sample surface and with
The vertical end alignment of L-type cantilever beam is arranged to shoot the misalignment of L-type cantilever beam；
High speed camera；It is arranged on horizontal base, and the high speed camera is located at electrowetting on dielectric standard reality
The side of sample is tested to shoot contact situation of the drop with the vertical end of L-type cantilever beam；
Power supply is arranged on horizontal base, and the anode of the power supply is electrically connected by conducting wire I with L-type cantilever beam, power supply
Cathode be electrically connected with horizontal copper sheet by conducting wire II；
Data control processing terminal, are located at the outside of transparent plastic operation cabinet, the data control processing terminal difference
It is connect with electricity driving displacement platform, laser sensor, high speed camera telecommunication.
Preferably, the electrowetting on dielectric standard test sample is bonded in the upper of horizontal copper sheet using Signa Gel
Side；The L-type cantilever beam is L-type pure copper tube, outer diameter 0.5mm, internal diameter 0.25mm；One end of the L-type cantilever beam is logical
Signa Gel is crossed to be connected on the slipping block of electricity driving displacement platform.
Preferably, the electrowetting on dielectric standard test sample includes: silicon wafer, the insulating layer being plated on silicon wafer and painting
It covers and dries in the hydrophobic layer on insulating layer.
Preferably, the insulating layer is the SiO of 200~400nm2Coating, the hydrophobic layer are Teflon layer.
Preferably, support frame as described above includes identical structure and vertical supporting frame connected vertically and horizontal shore；Institute
The structure for stating support frame includes:
Fixing end I and fixing end II disposed in parallel pass through two parallel linear guide connections；
Slipping block is slidably connected in two parallel linear guides；
Ball-screw is successively connect with fixing end I, slipping block and II threads turn of fixing end；
Wherein, the fixing end I of the vertical supporting frame is connected on horizontal base, the fixing end I of the horizontal shore
It is connected on the slipping block of vertical supporting frame；The laser sensor is connected on the slipping block of horizontal shore.
Preferably, the electricity driving displacement platform controls processing terminal electricity by displacement platform data-out port and data
Communication connection；The laser sensor controls processing terminal telecommunication with data by laser data output port and connect；It is described
High speed camera controls processing terminal telecommunication with data by image data output port and connect.
Beijing Jiang Yun Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017, manufacturer model of electricity driving displacement platform that the utility model uses is
Y200TA75。
The utility model is include at least the following beneficial effects:
(1) the utility model method is not necessarily to expensive experiment equipment, calculates simple, precision height, with high reality
With value.
(2) cantilever beam and specimen sample are simple to manufacture, and low in cost, experimenter can flexibly adjust according to practical situation
It is whole.
(3) instrument can realize the measurement to many kinds of force by simply adjustment, meet electric field and liquid phase test environment, test
Method is simple, and strong operability, experimental result is accurate, and experimental result repeatability is high.
(4) experimentation can carry out under room temperature, normal pressure, the experimental situation special without dustless, constant temperature etc.；It detects simultaneously
Time is short, and one group of experiment can be completed within 5~7 minutes, can increase substantially conventional efficient.
The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Detailed description of the invention:
Fig. 1 is the general system set-up signal that the utility model measures the measuring device of adhesion strength between solid liquid interface under electric field
Figure；
Fig. 2 is the structural schematic diagram of electrowetting on dielectric standard test sample described in the utility model；
Fig. 3 is the structural schematic diagram of support frame described in the utility model；
The measuring device of Fig. 4 adhesion strength between solid liquid interface under the utility model measurement electric field L-type cantilever before and after experiment
The variation schematic diagram of beam；
Fig. 5 be the utility model measure under electric field between solid liquid interface the L-type cantilever Liang Sicheng of the measuring device of adhesion strength with
The relational graph of time.
Specific embodiment:
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
The utility model devises a kind of measuring device for measuring solid liquid interface adhesion strength under electric field.Using the measuring device
In measurement process, with the slow movement of electricity driving displacement platform, due to the effect of L-type cantilever beam and the adhesion strength of drop, L-type
Cantilever beam deforms, and the specific value of L-type cantilever beam deformation in experiment is recorded by laser sensor, can calculate solid
Adhesion strength between liquid.Meanwhile high-speed camera shoots whole experiment process, records upper and lower surface contact angle and the contact of drop
The variation of area.In addition, L-type cantilever beam can also experimental actual conditions use with different mechanical properties material, energy
Further increase the accuracy of experiment.The measuring system is with easy to operate, low in cost, applied widely, measurement accuracy is high
The characteristics of, it is well positioned to meet the requirement of adhesion strength between solid liquid interface under measurement electric field.
Fig. 1 shows the measuring device of adhesion strength between solid liquid interface under a kind of measurement electric field of the utility model, comprising:
Transparent plastic operation cabinet 1；
Horizontal base 10 is arranged in transparent plastic operation cabinet 1；
Electricity driving displacement platform 2 is vertically arranged on horizontal base 10；
Horizontal copper sheet 8 is arranged on horizontal base 10；Electrowetting mark on the top bond medium of the horizontal copper sheet 8
Quasi-experiment sample 9；Wherein, drop 7 is added dropwise on electrowetting on dielectric standard test sample 9；
L-type cantilever beam 3, one end are connected on the slipping block of electricity driving displacement platform 2, and the other end is vertically oriented to medium and powers on
Wetting criteria laboratory sample 9 and make the vertical end of L-type cantilever beam 3 and the upper termination of drop 7 by the movement of electricity driving displacement platform 2
Touching；
Laser sensor 14 is vertically arranged in the surface of electrowetting on dielectric standard test sample 9 by support frame
And setting is aligned with the vertical end of L-type cantilever beam 3 to shoot the misalignment of L-type cantilever beam 3；
High speed camera 11 is arranged on horizontal base 10, and the high speed camera 11 is located at electrowetting on dielectric
The side of standard test sample 9 is to shoot contact situation of the drop 7 with the vertical end of L-type cantilever beam 3；
Power supply 4 is arranged on horizontal base 10, and the anode of the power supply 4 is electrically connected by conducting wire I 5 with L-type cantilever beam 3
It connects, the cathode of power supply 4 is electrically connected by conducting wire II 6 with horizontal copper sheet 8；Power supply, horizontal copper sheet, electrowetting on dielectric standard is real
Test sample, L-type cantilever beam connects to form circuit；
Data control processing terminal 18, are located at the outside of transparent plastic operation cabinet 1, and the data control processing terminal 18
It is connect respectively with electricity driving displacement platform 2, laser sensor 14,15 telecommunication of high speed camera.
In this technical solution, electrowetting on dielectric standard test sample bottom is bonded in level by Signa Gel
On copper sheet, and horizontal copper sheet is installed on horizontal base；Horizontal copper sheet, electrowetting on dielectric standard test sample, L-type are hanged
Arm beam is connected into circuit；Adjust the distalmost end (vertical end) that laser sensor position makes its light beam focus on L-type cantilever beam；It is being situated between
Matter powers on wetting criteria laboratory sample surface and drop to be measured is added dropwise, and L-type cantilever beam end is made to contact drop；Open power settings electricity
Pressure value；It opens high speed camera and laser sensor records experimentation；It opens electricity driving displacement platform to move by setting speed, make
Relative motion occurs for cantilever beam and drop to be measured, records cantilever beam by laser sensor and deforms size.
In the above-mentioned technical solutions, the electrowetting on dielectric standard test sample 9 is bonded in level using Signa Gel
The top of copper sheet 8；The L-type cantilever beam 3 is L-type pure copper tube, outer diameter 0.5mm, internal diameter 0.25mm；The L-type cantilever
One end of beam is connected on the slipping block of electricity driving displacement platform by Signa Gel.
In the above-mentioned technical solutions, as shown in Fig. 2, the electrowetting on dielectric standard test sample 9 includes: that silicon wafer (is led
Electric layer), the insulating layer that is plated on silicon wafer and coating and dry in the hydrophobic layer on insulating layer, be also as conductive layer using silicon wafer
Because current silicon wafer is most mature semiconductor conductive material, other materials cost performance highest is compared.
In the above-mentioned technical solutions, the insulating layer is the SiO of 200~400nm2Coating, the hydrophobic layer are Teflon
Layer.Select SiO2Coating is because of SiO2It is the most wide insulating materials of use scope now, in terms of considering manufacturing technology and cost
It is that current cost performance is highest, and SiO2The smooth coating that will not influence hydrophobic layer in surface, the thickness selection of 200~400nm
It is because, although biggish contact angle variation can be obtained in the lesser situation of voltage, being easy to lead when thickness is too small
Cause hydrophobic layer breakdown；When thickness is excessive, biggish voltage is needed if expecting biggish contact angle variation；By consulting
It is best selection section that related data and experiment, which obtain 200~400nm under existing experiment condition,.
Using Teflon as hydrophobic layer is because Teflon has excellent chemical stability, cheap, corrosion-resistant
The advantages that, and there is experiment compared with metal vapor deposition, plasma chemical vapor deposition using cladding process
Low, low in cost, experimental implementation the is simple advantage of environmental requirement.
In the above-mentioned technical solutions, as shown in figure 3, support frame as described above includes that structure is identical and vertical supporting connected vertically
Frame 12 and horizontal shore 13；The structure of support frame as described above includes:
Fixing end I 19 and fixing end II 23 disposed in parallel are connected by two parallel linear guides 20；
Slipping block 22 is slidably connected in two parallel linear guides 20；
Ball-screw 21 is successively connect with fixing end I 19, slipping block 22 and II 23 threads turn of fixing end；By turning
Dynamic ball-screw 21, so that it may slipping block 22 be driven to move in linear guide；
Wherein, the fixing end I of the vertical supporting frame 12 is connected on horizontal base 10, and the horizontal shore 13 is consolidated
Fixed end I is connected on the slipping block of vertical supporting frame 12；The laser sensor 14 is connected to the slipping block of horizontal shore 13
On.In this way, efficiently adjusting laser sensor 14 can be convenient by vertical supporting frame 12 and horizontal shore 13
Position.
In the above-mentioned technical solutions, the electricity driving displacement platform 2 passes through displacement platform data-out port 17 and data control
18 telecommunication of processing terminal connection processed；The laser sensor 14 is whole by laser data output port 16 and data control processing
18 telecommunications are held to connect；The high speed camera 11 controls processing terminal telecommunication by image data output port 15 and data
Connection, is mainly the mode by setting up integrated port, data can be unified synchronism output in this way, is convenient for subsequent energy
Wherein certain one piece of data and video information are analyzed for convenient extraction.
The method that adhesion strength between solid liquid interface under electric field is measured using the measuring device of the utility model, including following step
It is rapid:
Step 1: 10uL drop is added to electrowetting on dielectric standard test samples surface using pipettor；
Step 2: opening laser sensor, the slipping block position of horizontal shore is adjusted, laser beam focus is hanged in L-type
The vertical end of arm beam, and open electricity driving displacement platform, the slipping block for adjusting electricity driving displacement platform make the vertical end of L-type cantilever beam
End is in contact with drop upper end；Then current location is set to the dead-center position of laser sensor and electricity driving displacement platform；
Step 3: opening power supply, setting voltage value is 100V；It opens laser sensor simultaneously and high speed camera is recorded
Whole experiment process；It opens electricity driving displacement platform to move upwards by the speed of 0.015mm/s, makes L-type cantilever beam and drop to be measured
Relative motion occurs, stops the fortune of electricity driving displacement platform when drop completely disengages electrowetting on dielectric standard test sample surfaces
It is dynamic；Processing terminal, which is controlled, by data exports in whole experiment process the L-type cantilever beam recorded of laser sensor at any time
The situation of change (as shown in Figures 4 and 5) of displacement；
Step 4: the outer diameter of L-type cantilever beam and inner diameter values are brought into following formula:
D is L-type cantilever beam outer diameter in formula, is 0.5mm, is, d is L-type cantilever beam internal diameter, is 0.25mm, is calculated
The moment of inertia I=2.89 × 10-15m4；
Step 5: by the change in displacement value for the L-type cantilever beam that step 3 obtains (as shown in figure 5, what is obtained in circle is
Change in displacement value) it is brought into following formula with the moment of inertia of step 4, calculate the size of adhesion strength:
L-type cantilever beam elastic modulus E=101GPa in formula, L-type outrigger horizontal length L=90mm, the moment of inertia I=
2.89×10-15m4, L-type cantilever beam change in displacement Δ L=0.18mm calculates to obtain adhesion strength F=231.6 μ N.
In the above-mentioned technical solutions, the electrowetting on dielectric standard test sample the preparation method comprises the following steps: surface is coated with
SiO2The silicon wafer of coating is cut into 30*30mm standard sample, then carries out ultrasonic cleaning 5min to standard sample, uses blotting paper
The moisture of adsorption surface, is dried, and surface is kept completely to clean；Clean clean sample is placed in desk-top sol evenning machine, spin coating
Teflon lotion；Desk-top sol evenning machine spin coating parameters are as follows: spin coating 20s under low speed 500r/min state；High speed 3000r/min state
Lower spin coating 30s；Finally spun laboratory sample is placed in after 200 DEG C of oven for baking 3h to its natural cooling, is situated between
Matter powers on wetting criteria laboratory sample.
In the above-mentioned technical solutions, the L-type cantilever beam the preparation method comprises the following steps: take length be 190mm, outer diameter 0.5mm,
Internal diameter is the pure copper tube of 0.25mm, is bent into 90 ° of formation 100mm and 90mm two parts and L-type cantilever beam is made.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (2)
1. a kind of measuring device for measuring adhesion strength between solid liquid interface under electric field characterized by comprising
Transparent plastic operation cabinet；
Horizontal base is arranged in transparent plastic operation cabinet；
Electricity driving displacement platform is vertically arranged on horizontal base；
Horizontal copper sheet is arranged on horizontal base；The top bond medium of the horizontal copper sheet powers on wetting criteria experiment sample
Product；Wherein, drop is added dropwise on electrowetting on dielectric standard test sample；
L-type cantilever beam, one end are connected on the slipping block of electricity driving displacement platform, and the other end is vertically oriented to electrowetting on dielectric mark
Quasi-experiment sample and make the vertical end of L-type cantilever beam and the upper-end contact of drop by the movement of electricity driving displacement platform；
Laser sensor is vertically arranged in surface and and the L-type of electrowetting on dielectric standard test sample by support frame
The vertical end alignment of cantilever beam is arranged to shoot the misalignment of L-type cantilever beam；
High speed camera is arranged on horizontal base, and the high speed camera is located at electrowetting on dielectric standard test sample
The side of product is to shoot contact situation of the drop with the vertical end of L-type cantilever beam；
Power supply is arranged on horizontal base, and the anode of the power supply is electrically connected by conducting wire I with L-type cantilever beam, and power supply is born
Pole is electrically connected by conducting wire II with horizontal copper sheet；
Data control processing terminal, are located at the outside of transparent plastic operation cabinet, data control processing terminal respectively with electricity
Dynamic displacement platform, laser sensor, the connection of high speed camera telecommunication；
The electrowetting on dielectric standard test sample is bonded in the top of horizontal copper sheet using Signa Gel；The L-type cantilever
Beam is L-type pure copper tube, outer diameter 0.5mm, internal diameter 0.25mm；One end of the L-type cantilever beam is connected by Signa Gel
On the slipping block of electricity driving displacement platform；
The electrowetting on dielectric standard test sample includes: silicon wafer, the insulating layer being plated on silicon wafer and coating and dries in exhausted
Hydrophobic layer in edge layer；
The insulating layer is the SiO of 200~400nm2Coating, the hydrophobic layer are Teflon layer；
Support frame as described above includes identical structure and vertical supporting frame connected vertically and horizontal shore；The structure of support frame as described above
Include:
Fixing end I and fixing end II disposed in parallel pass through two parallel linear guide connections；
Slipping block is slidably connected in two parallel linear guides；
Ball-screw is successively connect with fixing end I, slipping block and II threads turn of fixing end；
Wherein, the fixing end I of the vertical supporting frame is connected on horizontal base, and the fixing end I of the horizontal shore connects
On the slipping block of vertical supporting frame；The laser sensor is connected on the slipping block of horizontal shore.
2. measuring the measuring device of adhesion strength between solid liquid interface under electric field as described in claim 1, which is characterized in that the electricity
Dynamic displacement platform controls processing terminal telecommunication with data by displacement platform data-out port and connect；The laser sensor
Processing terminal telecommunication is controlled with data by laser data output port to connect；The high speed camera is defeated by image data
Exit port is connect with data control processing terminal telecommunication.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269978A (en) * | 2018-11-16 | 2019-01-25 | 西南科技大学 | Measure the measuring device and measuring method of adhesion strength between solid liquid interface under electric field |
| CN114112900A (en) * | 2021-11-19 | 2022-03-01 | 湖北理工学院 | Icing force test system for anti-icing material |
-
2018
- 2018-11-16 CN CN201821886299.5U patent/CN209432679U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269978A (en) * | 2018-11-16 | 2019-01-25 | 西南科技大学 | Measure the measuring device and measuring method of adhesion strength between solid liquid interface under electric field |
| CN109269978B (en) * | 2018-11-16 | 2024-01-30 | 西南科技大学 | Measuring device and measuring method for measuring adhesion force between solid-liquid interfaces under electric field |
| CN114112900A (en) * | 2021-11-19 | 2022-03-01 | 湖北理工学院 | Icing force test system for anti-icing material |
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