CN209069773U - A kind of sessile drop method Solid Surface Free Energy test device - Google Patents
A kind of sessile drop method Solid Surface Free Energy test device Download PDFInfo
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Abstract
The utility model discloses a kind of sessile drop method Solid Surface Free Energy test devices, belong to surface chemistry analysis and testing technology field.Including the rotating mechanism that can carry out 360 degree rotation in vertical plane, the elevating mechanism being fixed on the rotating mechanism and the adjustable sample stage being fixed on the elevating mechanism and the sample clamp being fixed on the adjustable sample stage.By design one can 360 degree rotation test device, it is formed under sessile drop method state and tests the contact angle values of solid material, and pass through at the same when testing sessile drop method liquid surface tension value and revised 3D contact angle values, effectively the contact angle lagged when sessile drop method Contact-angle measurement is avoided to significantly affect test result, measuring accuracy is promoted, the science and reliability of measured value result are improved, measured value precision is high, it is easy to operate, there is very high promotional value.
Description
Technical field
The utility model patent is related to a kind of test device of surface free energy using sessile drop method test solid material, uses
Physicochemical properties between the solid-air interface of characterization solid material and between solid-liquid or solid-liquid-liquid three-phase system, belong to
Surface chemistry analysis and testing technology field.
Background technique
The surface free energy of solid is a kind of main index of physicochemical properties for characterizing solid material.Currently, logical
The test method of normal Solid Surface Free Energy is to stop drop-wise state (sessile by what test solid material surface was formed
Drop the mode of the contact angle under the conditions of), and using including Owens, equation of state (A.W.Neumann religion
Award), Acid base, one of mathematical models such as Wu are analyzed.The Zhao Guoxi that is defined on of contact angle writes " Action of Surfactant
Principle " page 494 be described as " solid, liquid, gas three-phase intersection, from solid liquid interface through liquid internal gas-liquid interface folder
Angle ", and the current statement of visible contact angle is usually to stop the drop state (Sessile drop) of drop in attached drawing one.This
In drop state, gravity acts on downwards solid-liquid interface.But due to the surface chemistry property of material, the surface of solid material
The outer aobvious process and fluent material of free energy are completely inconsistent, solid material itself it is intrinsic such as surface roughness, chemical diversity
Property, the characteristics such as isomerism there is (these three phenomenons are also referred to as contact angle hysteresis phenomenon), lead to existing contact angle test model
There is very large deviation in measured contact angle values and actual actual contact angle value.This species diversity is at present only by simple thick
Rugosity correction model or Wenzel-Cassie model carry out simple academic attitude derivation (R. Wenzel,
Resistance of solod surfaces to weting by water", Ind. Eng. Chem. 28, 988
(1936) and A.B.D. Cassie, S. Baxter, Trans. Faraday Soc. 40 (1944) 546-551.),
The practice used without the characterization or measurement means that accurately can be used in scientific meaning.According to Wenzel equation
equation.
cosθW = r cosθY :
θ W is containing the modified contact angle values of roughness, and θ Y is the contact angle values of absolute smooth surface, and r is rough surface
Degree.That is, actual contact angle values are theoretically smaller than apparent contact angle value there are in the case where surface roughness.Such as attached drawing two
It is shown.By experiment, we demonstrate that, the situation of change of contact angle caused by the nanostructure (migrated first dopant) of real world more than
Wenzel equation institute is complicated.Thus, need a kind of more scientific, the survey of simple test method completion contact angle hysteresis phenomenon
Examination.
As basic data, that is, contact angle values test method used in Solid Surface Free Energy,
Authur.W.Adamson exists in " Physical Chemistry of surfaces ", Gianangelo Bracco
" surface science techniques " summarizes the test method of numerous contact angles, including stops dripping (Sessile drop)
(bubble prize law/Captive bubble), poling board method, osmosis etc..Wherein, it in actual application, generallys use
Testing algorithm is sessile drop method (Sessile drop), and notable feature is the past tested sample upper surface of drop under gravity
Pressure.Also a kind of drop state corresponding with sessile drop method is bubble prize law (captive bubble), i.e., by tested sample
Product are immersed in liquid, form a bubble floated in the lower surface of sample, active force at this time is that buoyancy presses to bubble
Tested sample lower surface, there is equivalent feature when the action direction and sessile drop method of power.In practical application sessile drop method or bubble
When prize law, due to the uncertainty of contact angle hysteresis phenomenon, thus, there are certain mistakes for the achieved reliability of measured value result
Difference.
In drop state, the special state of one kind is hanging drop (pendant drop).Under such drop state, in needle
The lower end of head forms the drop of a suspension.Currently, sessile drop method is applied to liquid-gas surface tension or liquid-liquid circle in practical application
The assessment of face tension test, i.e. sessile drop method to as being only liquid and non-solid material at present.Numerous documents and monograph are referred to
Sessile drop method (Pendant drop) is used to test the surface tension or liquid-liquid interface tension value of liquid.Sessile drop method is used for test surfaces
Tension and interfacial tension measuring technology compared to the sessile drop method testing solid surface free energy that this patent refers to technology, it is basic
Property difference be that the former investigates to seeming liquid, the latter investigate to seeming solid, be completely inconsistent between the two.
A.W.Neumann is taught in " Applied surface thermodynamics " and " Axisymmetric Drop Shape
Analysis: Computational Methods for the Measurement of Interfacial Properties
From the Shape and Dimensions of Pendant and Sessile Drops " (J. Colloid
Interface Sci. 196 p.136-147,1997) in propose the algorithm of ADSA-P a kind of, propose and sessile drop method and stop
Drop method proposes the possibility that can be used for analyzing contact angle for assessing surface tension.In the formula for the discretization that it is proposed,
Surface tension and contact angle are the output end values of Fitting Analysis.But the droplet profile that stresses of contact angle analysis is stopping
When drop method (side view sessile drop or top view method ADSA-D/ADSA-MD).In sessile drop method, analyze in the result exported
Not using contact angle values as necessary item output, and its practical application focuses on surface tension.In sessile drop method, assessment
To the surface tension or interfacial tension for seeming liquid, and the property of non-solid material.Meanwhile in test solid material contact angle
During value, respectively to the contact angle opposite sex as caused by the hysteresis quality contact angle phenomenon of solid material, so that contact angle values are 2
It ties up and shows as left and right inconsistency in image, and the ADSA-P method of A.W.Neumann axisymmetric hypotheses in sessile drop method
There are conflicts, thus ADSA-P algorithm can not be applied to sessile drop method Contact-angle measurement, also be not used to the table of assessment solid material
Face free energy.
For the analysis of solid material surface free energy, 98% sample due to Chemical Diversity, surface roughness and
There is apparent contact angle hysteresis in the presence of isomerism, and then causes the shape for showing as drop in terms of notable feature extremely difficult
Form the requirement such as the mentioned axisymmetric image of A.W.Neumann professor.Thus, relative to analyzing liquid under hanging drop state
Surface tension for, the contact angle of solid material and its corresponding surface free energy analysis are more difficult.
Our company is in patent " a kind of the device for testing intrinsic contact angle and the test method " (patent No.
201310645945.4) it proposes a kind of tilt and stops sample upper surface under drop-wise state, form left and right different angle under the influence of gravity
Angle value, and then the method for analyzing solid material actual contact angle.But since contact angle test algorithm limits, (algorithm is only at present
Support sessile drop method droplet profile) and tilt angle be unable to reach 180 degree inversion, thus, on gravity Impact direction and this
Model mentioned by patent is completely inconsistent, can not also solve the problems, such as the accurate characterization of solid material contact angle measured value.Our company
In patent " a kind of test device and test method of 3D contact angle ", (patent No.: 201510225605.5) and patent is " a kind of
Turned back the 3D contact angle test device and method of optical path using polygon prism " one is proposed in (patent No. 201710951206.6)
Kind for realize characterization solid material there are the method for accurate contact angle values when Chemical Diversity, isomerism and surface roughness and
Device tests the contact angle values under 360 viewing angles, for characterizing the uniformity and quality degree, hydrophobe of solid material
Property.But the test droplets shape of the patent is still to stop drop-wise state, it is completely different with droplet morphology mentioned by this patent
It causes.
A kind of our company's patent " device for testing intrinsic contact angle " patent No. 201320791789.8 discloses one kind
The test device of intrinsic contact angle when sessile drop method is interfered since liquid inlet device and rotating mechanism are formed in practical applications, can not shape
At the drop state of hanging drop, it is unable to satisfy the structural requirement of this patent.
All estimating algorithms for the surface free energy announced at present are all based on the derivation of various mathematical models, answer actually
In, in addition to contact angle measured value result causes due to using sessile drop method there are error, while when these mathematical models of application
There is very big integrity problem in the surface tension of used probe liquid and its component value itself, thus, final solid table
The science and reliability of the end value of face free energy have the defects that certain.
It include wide supreme people's court's (WH method), circle fitting process, ellipse fitting method, tangential method (multinomial from the algorithm of Contact-angle measurement
Curve matching) and Young-Laplace equation model method.Due to gravity and solid, liquid interfacial tension function influence, hang
Under drop method state, the shape of drop will form apparent diffusion phenomena in contact position, thus, remove Young-Laplace equation
Outside fitting process, only tangential method can be used for measuring from geometry in meaning for the contact angle under simple test once hanging drop state
Value.But the measured value result of tangential method and interfacial tension analysis difference in surface chemistry meaning are very big, monitoring error is big,
Measured value repeatability is not high, influences vulnerable to the miscellaneous point of contact line location context, and there are very big defects, can not be applied to real meaning
On solid material physicochemical properties characterization.And Young-Laplace equation model method is only mentioned in sessile drop method at present
For the data output of surface tension test, and require tested drop profile be it is axisymmetric, thus, be also unable to satisfy as above
The characterization of the contact angle of solid material under the conditions of mentioned contact angle hysteresis property.
From the point of view of existing document both domestic and external and from the point of view of commercialized analysis instrument, currently, using sessile drop method for dividing
The practical application document and example for analysing contact angle values do not occur.And for practical significance and application, by changing weight
The method of power effect is the method the most reliable of the hysteresis of the solid material contact angle measured value of solution 98%.For this purpose, compeling
It is essential and wants a kind of device, for testing the 3D contact angle values of the solid material under the conditions of sessile drop method, and propose corresponding 3D contact
The specific testing algorithm of angle test, the surface free energy for analysis and assessment solid material.It is free by the sessile drop method surface of solids
Energy test device and corresponding testing algorithm, promote the characterization precision and reliability of the physicochemical properties of solid material surface,
Meet scientific research institutions, research unit's research and development test specific for biomimetic material research, nano material analysis, the exploitation of new material etc.
Demand has great promotional value.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of tests of sessile drop method Solid Surface Free Energy to fill
It sets, solves to characterize in existing Solid Surface Free Energy test using sessile drop method (Sessile drop method) contact angle test
Contact angle low precision, the two high key problems of surface free energy appraising model analytical error are right in new material research to meet
In the purpose of solid material physicochemical properties high precision measurement demand.
Technical problem to be solved in the utility model takes following technical scheme to realize:
A kind of sessile drop method Solid Surface Free Energy test device, the rotation including 360 degree rotation can be carried out in vertical plane
Mechanism, the elevating mechanism being fixed on the rotating mechanism and the adjustable sample stage being fixed on the elevating mechanism and solid
The sample clamp being scheduled on the adjustable sample stage, sample is fixed on sample clamp, and sample surface has water
Drop.
Further, the structures join relationship of the sample and water droplet in air when, water droplet is in sample
Lower surface；After immersing in liquid, water droplet is bubble drop, and position is located at the upper surface of sample.
By using above-mentioned technical proposal, sample is fixed on sample clamp, adjusts elevating mechanism, adjustable sample
Sample platform and rotating mechanism to suitable position, then is formed on sample by micro-injection pump stop dripping rotate again after form hanging drop, or
It is connected by micro-injection pump and on micro-injection pump and drips upper hanging drop in sample lower surface after U-shaped syringe needle, when completing sessile drop method
Fixation surface free energy test.
As preferred embodiment, the rotating mechanism includes bracket and vertical fixed optics rotary flat on the bracket
Platform, the elevating mechanism are fixed on the optics rotating platform.
As preferred embodiment, the elevating mechanism includes the first differential head, fixed block, fixing seat and guide rail, the fixation
Seat is fixed with the rotating mechanism, and the first differential head is fixed with the fixed block and the first differential head front end and fixing seat connect
It connects, the guide rail passes through fixing seat, and guide rail one end is fixed with fixed block, and the guide rail other end and the adjustable sample stage are solid
It is fixed.
As preferred embodiment, spring base is additionally provided on the fixed block.
As preferred embodiment, the adjustable sample stage includes top panel, lower panel, the second differential head and is arranged upper
Steel ball between panel, lower panel, the top panel, the lower panel pass through four tension springs respectively fixes steel ball, and described
Two differential heads pass through lower panel and its front end is fixed with top panel, and lower panel is fixed with elevating mechanism, and the sample clamp is fixed
On top panel.
As preferred embodiment, the sample clamp includes the mounting base fixed with the adjustable sample stage, with knob
And the slide for horizontally rotating the screw rod of connection with the mounting base and being spirally connected with the screw rod, in the mounting base, the slide
Pressing plate is fixed with by screw, sample is put between mounting base and slide and is compressed it by pressing plate.
As preferred embodiment, rotating mechanism make adjustable sample stage carry out 360 degree rotation or make entire test device into
Row 360 degree rotation.
The beneficial effects of the utility model are: by design one can 360 degree rotation test device, formed sessile drop method shape
The contact angle values of solid material are tested under state, and are passed through while the surface tension value of liquid and revised when testing sessile drop method
3D contact angle values, analysis test obtain the surface free energy of solid, can effectively avoid lagging when sessile drop method Contact-angle measurement
Contact angle significantly affects test result, promotes measuring accuracy, improves the science and reliability of measured value result, walks out
Contact-angle measurement is opened using measured value mistaken ideas caused by sessile drop method for new material research, biomimetic material development, petroleum for a long time
Adopt industry, iron and steel metallurgical industry provides reliable material physical chemistry property analysis tool, measured value precision height, easy to operate, tool
There is very high promotional value.
Detailed description of the invention
Fig. 1 is that the utility model stops drop-wise state structural schematic diagram；
Fig. 2 is that the utility model stops dripping side view of the state；
Fig. 3 is the utility model hanging drop status architecture schematic diagram；
Fig. 4 is the utility model hanging drop side view of the state；
Fig. 5 is the utility model hanging drop state drop status diagram；
Fig. 6 is that the utility model stops drop-wise state drop status diagram；
Fig. 7 is sessile drop method sessile drop method contact angle test data comparison figure.
In figure: rotating mechanism 1, bracket 11, optics rotating platform 12, elevating mechanism 2, the first differential head 21, fixed block 22,
Fixing seat 23, guide rail 24, spring base 25, adjustable sample stage 3, top panel 31, lower panel 32, the second differential head 33, steel ball 34,
Sample clamp 4, mounting base 41, screw rod 42, slide 43, pressing plate 44 stop drop 5, hanging drop 6, sample 7.
Specific embodiment
In order to which the technical means, creative features, achievable purpose and effectiveness to the utility model are easy to understand, tie below
Conjunction is specifically illustrating, and the utility model is further described.
As Figure 1-Figure 4, a kind of sessile drop method Solid Surface Free Energy test device, including can be carried out in vertical plane
The rotating mechanism 1 of 360 degree rotation, the elevating mechanism 2 being fixed on the rotating mechanism 1 and it is fixed on the elevating mechanism 2
On adjustable sample stage 3 and the sample clamp 4 that is fixed on the adjustable sample stage 3, be fixed on sample clamp 4 tested
Sample 7,7 surface of sample have water droplet, and water droplet forms hanging drop 6 according to different rotation status in test or stops drop 5.
Further, the rotating mechanism 1 includes bracket 11 and the optics rotary flat being fixed on the bracket 11 vertically
Platform 12, the elevating mechanism 2 are fixed on the optics rotating platform 12, pass through the knob band on rotary optical rotating platform 12
Dynamic adjustable sample stage 3 is rotated in vertical plane, provides possibility to form 6 form of hanging drop.
Further, the elevating mechanism 2 includes the first differential head 21, fixed block 22, fixing seat 23 and guide rail 24, described
Fixing seat 23 and the rotating mechanism 1 are fixed, and the first differential head 21 is fixed with the fixed block 22 and the first differential head 21
Front end and fixing seat 23 are rotatablely connected, and the guide rail 24 passes through fixing seat 23, and 24 one end of guide rail and fixed block 22 are fixed, guide rail
24 other ends and the adjustable sample stage 3 are fixed, and adjusting the first differential head 21 can make guide rail 24 glide in fixing seat 23
It is dynamic, to change the height of adjustable sample stage 3.
Further, spring base is additionally provided on the fixed block 22.
Further, the adjustable sample stage 3 includes top panel 31, lower panel 32, the second differential head 33 and setting
Steel ball 34 between top panel 31, lower panel 32, the top panel 31, the lower panel 32 pass through four tension springs for steel respectively
Ball 34 is fixed, and the second differential head 33 passes through lower panel 32 and its front end is fixed by jackscrew and top panel 31, lower panel 32
Fixed with elevating mechanism 2, the sample clamp 4 is fixed in the above on plate 31, turns the second differential head 33, and it is straight to adjust top panel 31
To level.
Further, the sample clamp 4 includes the mounting base 41 fixed with the adjustable sample stage 3, with knob
And the slide 43 for horizontally rotating the screw rod 42 of connection with the mounting base 41 and being spirally connected with the screw rod 42, the mounting base 41,
Pressing plate 44 is fixed with by screw on the slide 43, sample is put between mounting base 41 and slide 43 and by pressing plate 44
It compresses it.
When testing the Solid Surface Free Energy or contact angle values of super hydrophobic material, one is immersed in using by super hydrophobic material
In square container made of a quartz glass, the upper inverted hanging drop 6 of bubble formation is dripped in the upper surface of sample 7, will be tested
Obtained contact angle values take it is negative after, be added to obtain corresponding the actual contact angle value with 180 degree.
The structures join relationship of sample 7 and water droplet in air when, water droplet is in the lower surface of sample；It is immersing
After in liquid, water droplet is bubble drop, and position is located at the upper surface of sample.
As shown in attached drawing 1-2, to stop dripping status diagram；Adjustable sample stage 3 is passed through into the rotation of rotating mechanism 1 180
The hanging drop status diagram such as Fig. 3, Fig. 4 can be formed after degree, for carrying out test data comparison.
Also, further, according to actual test needs, rotating mechanism 1 can be set to only revolve adjustable sample stage 3
Turn or adjustable sample stage 3 is rotated together with imaging system or rotates integrally entire test device.
In addition, also providing the measurement method for using the measuring device, comprising:
The test formula of sessile drop method Solid Surface Free Energy:
x/ds=cos(θ) (1)
dz/ds=sin(θ) (2)
dθ/ds=2/R0-Cz-sinθ/x (3)
dV/ds=πx2sinθ (4)
dA/ds=2πx (5)
x(0)=z(0)= θ(0)=V(0)=A(0)=0 (6)
C=Δρg/γ1 (7)
γ2=γ1(Cos(180-θ1)-Cos (180-θ2)(1+cos(180-θ2))2)/((1+Cosθ1)2-(1+cosθ
2)2) (8)
Wherein, θ, θ 1 and θ 2 is hanging drop 6 and sample 7 is contact angle, left contact angle and right contact angle values, and s is arc length,
R0 is the radius of curvature of vertex position, and Δ ρ is that inside and outside phase density is poor, and z-height, x is width, and V is volume, and A is area, x0, z0
For apex coordinate, γ 2 is the surface free energy of tested solid sample, and γ 1 is the surface tension value of tested liquid
By equation group simultaneous as above, the calculating of solid material table free energy is completed.
Sessile drop method solid material 3D contact angle test method:
A, by after two-dimentional hanging drop contact angle picture is deleted the image apex region of 6 drop of hanging drop with no vertex
Form carries out being formed separately left and right two images；
B, the image of arranged on left and right sides is fitted equation as above (3) curve by interative least square method, forms surface
After the coefficient of power and vertex curvature radius relationship, then by the coefficient substituted back into equation (3), fitting obtain surface tension value with it is corresponding
Contact angle values；
C, by the surface tension of liquid value analyzed in b step as above and left and right contact angle values, substituted back into equation (8),
Analysis obtains the surface free energy value of the solid material under corresponding conditions, i.e. obtained 2 value of γ is tested in analysis.
By test device as above and test method, we have carried out contact angle to a series of actual solid material samples
Test and surface free energy test.Hanging drop, stop drip 5 states difference it is as shown in Figure 5, Figure 6, test result is as follows shown in table:
Using the calculated result for eliminating other data after 1 and 18 item data values when the above percentage error calculates.
As shown in fig. 7, according to upper table draw contact angle monitoring error contrast curve chart, by Fig. 7 it can be found that
(1) 30 degree of contact angle values hereinafter, hanging drop 6 with stop drip 5 method measured value resultant errors it is little；
(2) contact angle values between 30-120 degree, sessile drop method contact angle values measured value result are less than connecing for sessile drop method measured value result
Feeler value；
The contact angle values measured value result of (3) 120 degree or more of contact angle values, sessile drop method is higher than sessile drop method contact angle values.
Comprehensive as above analysis it follows that
When (1) 120 degree or less contact angle values, sessile drop method measured value result due to there is no drop nanostructure (migrated first dopant),
And sessile drop method drop has migrated first dopant, when contact angle values sessile drop method measured value result being caused to be less than sessile drop method.Illustrate at this time velvet-like
Cause contact angle measured value result when conventional sessile drop method bigger than normal when structure.
When (2) 120 degree or more contact angle values, due to migrated first dopant, held up also without velvet-like result when sessile drop method measured value,
But sessile drop method measured value result is bigger.
(3) above data further demonstrates Wenzel-Cassie model.Only its range that works is 30-120 degree,
Using 30 degree as lower bound, 120 degree are used as the upper bound, rather than the original 90 degree subregions for boundary.This boundary connects in sessile drop method measurement
It is just proved when feeler value.
(4) Solid Surface Free Energy calculates the line of demarcation of validity at 120 degree.120 degree or more of contact angle values are applied to
Solid Surface Free Energy is invalid.
To, by the utility model design one can 360 degree rotation test device, formed sessile drop method state under survey
The surface tension value of liquid and revised 3D contact when trying the contact angle values of solid material, and passing through while testing sessile drop method
Angle value, analysis test obtain the surface free energy of solid, can effectively avoid the contact angle lagged when sessile drop method Contact-angle measurement
Test result is significantly affected, promoted measuring accuracy, improve measured value result science and reliability, walked out for a long time with
Carry out Contact-angle measurement use and stop measured value mistaken ideas caused by 5 methods of drop, is new material research, biomimetic material development, oil exploitation row
Industry, iron and steel metallurgical industry provide reliable material physical chemistry property analysis tool, and measured value precision is high, easy to operate, have non-
Often high promotional value.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry it should be appreciated that the present utility model is not limited to the above embodiments, do not depart from the spirit of the present invention and
Under the premise of range, the utility model also has various changes and improvements, these changes and improvements both fall within the utility model and want
In the range of asking protection.The protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (8)
1. a kind of sessile drop method Solid Surface Free Energy test device, it is characterised in that: including 360 degree of rotations can be carried out in vertical plane
Rotating mechanism, the elevating mechanism being fixed on the rotating mechanism and the adjustable sample being fixed on the elevating mechanism turned
Sample platform and the sample clamp being fixed on the adjustable sample stage are fixed with sample, sample table on sample clamp
Face has water droplet.
2. a kind of sessile drop method Solid Surface Free Energy test device according to claim 1, it is characterised in that: the rotation
Mechanism includes bracket and vertical fixed optics rotating platform on the bracket, and the elevating mechanism is fixed on the optics rotation
Turn on platform.
3. a kind of sessile drop method Solid Surface Free Energy test device according to claim 1 or 2, it is characterised in that: described
Elevating mechanism includes the first differential head, fixed block, fixing seat and guide rail, and the fixing seat is fixed with the rotating mechanism, described
First differential head is fixed with the fixed block and the first differential head front end is connect with fixing seat, and the guide rail passes through fixing seat, and
Guide rail one end is fixed with fixed block, and the guide rail other end is fixed with the adjustable sample stage.
4. a kind of sessile drop method Solid Surface Free Energy test device according to claim 3, it is characterised in that: the fixation
Spring base is additionally provided on block.
5. a kind of sessile drop method Solid Surface Free Energy test device according to claim 3, it is characterised in that: described adjustable
Section sample stage includes top panel, lower panel, the second differential head and the steel ball being arranged above between plate, lower panel, it is described on
Panel, the lower panel pass through four tension springs respectively fixes steel ball, the second differential head pass through lower panel and its front end with
Top panel is fixed, and lower panel is fixed with elevating mechanism, and the sample clamp is fixed in the above on plate.
6. a kind of sessile drop method Solid Surface Free Energy test device according to claim 1 or 5, it is characterised in that: described
Sample clamp includes the mounting base fixed with the adjustable sample stage, connect with knob and horizontally rotating with the mounting base
Screw rod and the slide that is spirally connected with the screw rod, pressing plate is fixed with by screw in the mounting base, the slide.
7. a kind of sessile drop method Solid Surface Free Energy test device according to claim 1, it is characterised in that: whirler
Structure makes adjustable sample stage carry out 360 degree rotation or entire test device is made to carry out 360 degree rotation.
8. a kind of sessile drop method Solid Surface Free Energy test device according to claim 1, it is characterised in that: described tested
The structures join relationship of sample and water droplet in air when, water droplet is in the lower surface of sample；After immersing in liquid, water droplet
It is dripped for bubble, and position is located at the upper surface of sample.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253948A (en) * | 2018-11-07 | 2019-01-22 | 上海梭伦信息科技有限公司 | A kind of sessile drop method Solid Surface Free Energy test device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253948A (en) * | 2018-11-07 | 2019-01-22 | 上海梭伦信息科技有限公司 | A kind of sessile drop method Solid Surface Free Energy test device and method |
| CN109253948B (en) * | 2018-11-07 | 2023-12-01 | 上海梭伦信息科技有限公司 | Device and method for testing free energy of solid surface by hanging drop method |
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