CN109883893A - A kind of experimental provision for surface of solids wetting contact angular measurement - Google Patents
A kind of experimental provision for surface of solids wetting contact angular measurement Download PDFInfo
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- CN109883893A CN109883893A CN201910268375.9A CN201910268375A CN109883893A CN 109883893 A CN109883893 A CN 109883893A CN 201910268375 A CN201910268375 A CN 201910268375A CN 109883893 A CN109883893 A CN 109883893A
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Abstract
The invention discloses a kind of experimental provisions for surface of solids wetting contact angular measurement, belong to the field of measuring technique of surface of solids contact angle.It includes main body case, console, feed liquor unit, air admission unit and hold assembly, and hold assembly includes a connecting rod and the solid sample disk on connecting rod, and hold assembly is mounted in main body case；A gas vent is offered in the upper right corner of main body case, offers a drainage hole in its lower left corner, the side in main body case is provided with connecting rod；Console carries out data acquisition for temperature, the pressure of experimental provision to be adjusted, and using image capture system, is measured with the wetability to porous media.Experimental provision of the present invention can not only accurately measure contact angle, additionally it is possible to measure influence of the different condition to contact angle, keep the measurement of contact angle more extensive, applicability is stronger；The precision that measurement can be improved simultaneously guarantees the continuity of measurement, reduces the loss of material.
Description
Technical field
The invention belongs to the field of measuring technique of surface of solids contact angle, and in particular to one kind connects for surface of solids wetting
The experimental provision of feeler measurement.
Background technique
Contact angle is one of most sensitive parameter in material surface analysis, and effective detecting depth is about 3-20nm, is passed through
The measurement of contact angle can obtain many information of material surface solid-liquid, solid-air interface interaction.The bigger explanation of contact angle
Solid hydrophobic surface is stronger, and contact angle is smaller, then surface of solids hydrophily is stronger.There are many measuring method of contact angle, according to
The physical quantity directly measured is divided into four major class: angular measurement, power mensuration, linear measure longimetry method and infiltration mensuration.Wherein, liquid
It is most common for dripping angular measurement, and most flat-footed a kind of method.Although such, the method is simple and quick, exists
Perhaps insufficient: to be that such method not can avoid the error for artificially making tangent line first, cause the reduction of measurement accuracy；Followed by measure
Continuity it is lower, need to re-replace sample if measuring failure and measure, consumptive material is more；It is finally that such method can only
Contact angle under measurement is static, and the influence of gas with various, wetting agent, temperature and pressure to contact angle cannot be measured.Power measurement
Method is stringent to the required precision of electronic balance, while requiring solid to be measured that need to reach equilibrium state in measurement process, avoids
Measure Static Contact angular distortion.Linear measure longimetry method, which avoids goniometry and determines, to be generated when three-phase junction position and tangential direction
Random error, while dynamometry is also avoided by systematic error caused by experimental provision and measuring state, but linear measure longimetry method exists
When the tie-in equation of derivation contact angle and length parameter, often there are some assumed conditions.It is not able to satisfy again during actual measurement
These conditions, this will make measurement result generate error.The scope of application of osmosis is without so extensively, may be only available for powder
The solid particle of shape.In order to more efficient, quick and comprehensive measurement it is various under the conditions of contact angle, develop a kind of for solid table
The experimental provision of face wetting contact angular measurement is just particularly important.
Summary of the invention
The purpose of the present invention is to provide a kind of experimental provisions for surface of solids wetting contact angular measurement, can not only
The precision of measurement is improved, and can guarantee the continuity of measurement, reduces the loss of material, while static and dynamic two can be measured
Contact angle under kind state, can also embody influence of the different condition to contact angle measurement result, provide for the measurement of contact angle
New approaches.
Its technical solution includes:
A kind of experimental provision for surface of solids wetting contact angular measurement comprising main body case, console, feed liquor list
Member, air admission unit and hold assembly, the hold assembly include a connecting rod and the solid sample disk on connecting rod, described
Solid sample disk inner wall is coated with high-temperature and high-presure resistent silica gel, and the hold assembly is mounted in the main body case；
The upper right corner of the main body case is provided with a gas vent, its lower left corner is provided with a drainage hole, in the master
Side in body case is provided with connecting rod；
The console utilizes image capture system for temperature, the pressure of the experimental provision to be adjusted
Data acquisition is carried out, is measured with the wetability to porous media, the console includes temperature sensor, pressure sensing
Device, PTC heating sheet, high-definition camera and computer, the temperature sensor and pressure sensor are located at the inside group of main body case
The both ends of part connecting rod, the PTC heating sheet are located on the connecting rod, and the temperature sensor, pressure sensor pass through
Respective route is connect with external control system, and the high-definition camera is used for capture image, the computer by high definition
The image of cameras capture is analyzed, is calculated, to obtain optimum contact angle；
It is provided with an annular through-hole on the main body chamber interior wall of the connecting rod opposite side, and is set at the annular through-hole
Be equipped with its shape, the matched ring screw circle of size, high-boron-silicon glass is inlaid on the ring screw circle, in the height
The edge of Pyrex is installed by annular light source；
The feed liquor unit for providing different wetting agents into the main body case, the air admission unit be used for
Different gas is provided in main body case, and the feed liquor unit and air admission unit passes through the console and controlled.
As a preferred solution of the present invention, above-mentioned feed liquor unit includes water tank, water pump, connecting line and control
Valve, above-mentioned connecting line link together water tank and above-mentioned main body case, above-mentioned connecting line and above-mentioned main body case
Between be connected through a screw thread, junction is sealed processing.
As another preferred embodiment of the invention, above-mentioned air admission unit include gas charging-tank, air pump, air inlet pipeline and
Intake valve, one end of above-mentioned air inlet pipeline connect above-mentioned gas charging-tank, and the other end connects aforementioned body case, above-mentioned gas
Pump, intake valve are mounted on above-mentioned air inlet pipeline.
Further, above-mentioned feed liquor unit is located at the lower left of aforementioned body case, and above-mentioned water tank is according to experiment needs
Different wetting agents is provided, signal receiver one is housed on above-mentioned control valve, when above-mentioned temperature sensor and pressure sensor
After setting temperature and pressure value, signal is passed to above-mentioned signal receiver one by the control system of above-mentioned console, and is led to
It crosses control pump switch and carries out a liter heat boosting.
Further, above-mentioned air pump is miniature adjustable speed air pump, and signal receiver two is housed on above-mentioned intake valve, is led to
The signal that signal receiver two receives console is crossed, and then controls the flow and flow velocity of gas.
Further, using the metal plain cushion of forced seal processing at the sealing of above-mentioned annular through-hole and ring screw circle
Sealing, above-mentioned annular light source are to penetrate light source in focusing.
Advantageous effects brought by the present invention are as follows:
The present invention is able to solve the single problem of Contact-angle measurement condition, can not only accurately measure contact angle, moreover it is possible to
Enough influence of the measurement different condition to contact angle, keep the measurement of contact angle more extensive, applicability is stronger.Measurement can be improved simultaneously
Precision, guarantee measurement continuity, reduce the loss of material.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is the overall schematic of experimental provision of the present invention；
Fig. 2 is the right side schematic view of experimental provision of the present invention；
Fig. 3 is the leftschematic diagram of experimental provision of the present invention；
Fig. 4 is experimental provision inside left detail view of the present invention；
Wherein 1- main body case, 2- console, 3- component, 4- water tank, 5- water pump, 6,7- control valve, 8- air pump, 9- ring light
Source, 10- high-definition camera, 11- hold assembly, 12- gas supply device, 13- gas vent, 14- drainage hole, 15- temperature sensing
Device, 16- pressure sensor, 17-PTC heating sheet.
Specific embodiment
It is of the invention excellent in order to make the invention proposes a kind of experimental provision for surface of solids wetting contact angular measurement
Point, technical solution are clearer, clear, elaborate combined with specific embodiments below to the present invention.
In conjunction with shown in Fig. 1 to Fig. 4, a kind of experimental provision for surface of solids wetting contact angular measurement of the present invention, including
Main body case 1, console 2, component 3, water tank 4, water pump 5, control valve 6, control valve 7 (i.e. intake valve), air pump 8, annular light source 9,
High-definition camera 10, hold assembly 11, gas supply device 12, gas vent 13, drainage hole 14, temperature sensor 15, pressure pass
Sensor 16 and PTC heating sheet 17.
Main body case 1 according to the present invention is designed, using anticorrosive according to GB150.1-150.4-2011
Property, compressive resistance and carbon steel resistant to high temperature make outer wall, and outer wall smearing thickness is prevented in 250 μm or more of antirust paint because setting
For corrosion, bring influences.A gas vent 13 is opened in the main body case upper right corner, and the gas in main body case, lower-left are discharged when for filling the water
Open a drainage hole 14, the liquid for being discharged in main body case case in angle.
Console 2 according to the present invention is a kind of intelligent control system based on PLC.Console 2 and internal component
3 are connected by connecting rod, bar internal cable road, carry out signal transmission by route, while powering for internal component 3.Connecting rod and case
Body is connected in left side wall using being threadedly coupled, and junction uses the metal flat gasket of forced seal processing, i.e., on seal face
Enough seal pressures are generated to prevent dielectric leakage in cabinet.Signal receiver is housed on the switch controller of water pump 5, is being controlled
With after pressure value, master control system then passes to signal on internal component 3 set temperature on the man-machine interaction interface of platform processed
Signal receiver (i.e. signal receiver one) on the switch controller of PTC heating sheet signal receiver and water pump 5, and pass through control
Thermistor and pump switch processed carry out a liter heat boosting.Temperature sensor is waited for the real-time temperature sensor of pressure sensor with pressure value
When to assigned temperature with pressure value, transfer signals on the signal receiver of master control system, then master control system passes through signal
Control water pump stops working, and heating sheet is in constant temperature keeping warm mode.The data of the real-time temperature collection sensor of master control system, and make
The intracorporal temperature of case keeps constant temperature.
Internal component 3 according to the present invention is matched on heating sheet by installing PTC heating sheet 17 additional outside a vertical connecting rod
There is signal receiver.Connecting rod two end reload temperature sensor 15 and pressure sensor 16, are connected by route with external control stand.
Master control system is passed the signal along to by route on the receiver of each element, and then achievees the purpose that each element of control.
Water tank 4 according to the present invention and water pump 5,4 dischargeable capacity of water tank are greater than testing stand internal capacity, can be according to reality
The actual conditions tested add different wetting agents in cabinet, to measure the contact angle under the conditions of different wetting agent.On water pump 5
Switch controller receives the signal of master control system by signal receiver, and then controls pump switch.Its left side and 4 phase of water tank
Even, right side is attached by water pipe and the screw thread of main box lower end, and junction is close using the metal plain cushion of forced seal processing
Envelope, guarantees the leakproofness of cabinet.Add control valve 6 among water pump and water tank, after pressure reaches setting, receiver is connect on valve
Receive the signal of console transmission, control valve switch.Valve is closed, with pressure in guard box body.
Air pump 8 according to the present invention, it is miniature adjustable speed air pump, and the letter of master control system is received by signal receiver
Number, and then control the flow and flow velocity of gas.Its right side is gas supply device 12, can be external not according to the actual conditions of application
Same gas cylinder, to measure the contact angle under the conditions of gas with various, left side is attached by tracheae and the screw thread of 1 lower end of main body case,
Junction uses the metal flat gasket of forced seal processing, to guarantee the leakproofness of cabinet.Centre adds valve 7, receiver on valve
Receive the signal of console transmission, control valve switch.Valve is opened, generates bubble to blast gas.
Light source 9 of the present invention is annular light source, is furnished with receiver on annular light source switch controller, passes through master control system
System controls whether it opens.In one hole of main body case right side opening, by high temperature resistant, high pressure, high transparency and erosion-resisting high borosilicate
Glass (hard glass) is embedded on a ring screw circle, and ring screw circle is connect with through-hole, and junction is using pressure
The metal flat gasket of encapsulation process, to guarantee the leakproofness of cabinet.High-boron-silicon glass edge is installed by annular light source 9, ring light
Source is to penetrate light source in focusing, and shell is installed additional to the outer rim of ring illumination equipment, to guarantee to penetrate in light source.
High-definition camera 10 according to the present invention, high-definition camera open it by receiving the signal of master control system
Control is closed, external computer equipment is to handle the image captured, by using image analysis processing image data
Code (KSVCAM200) analyzes each image or so contact angle using program, then calculates left and right contact according to best fit degree
Angle finally obtains optimum contact angle by analysis.
Hold assembly 11 of the present invention, it is a connecting rod reinforcing body sample disc, and solid sample disk inner wall is coated with resistance to
The silica gel of high temperature and pressure is used for fixed solid sample, can guarantee not influence collection result in image acquisition process in this way.Gu
Body sample size is diameter 2cm, thickness 1cm, and when experiment must assure that solid sample surface cleaning cannot have other impurities, avoid
Influence the accuracy of experiment.Main body case top drilling, its purpose is to be conveniently replaceable test specimen.Main body case passes through screw thread and lower part
Clamping device is attached, and junction uses the metal flat gasket of forced seal processing, guarantees the leakproofness of cabinet.
Before being tested using above-mentioned experimental provision, test in accordance with the following steps.
Cabinet, is respectively sealed closing first, opens console 2 by the inspection that carry out air-tightness to device before experiment starts
Power supply, opened using master control system control valve 7, and then control air pump 8, human-computer interaction interface on console 2 is set up special
Fixed pressure value is closed after the signal of the reception master control system of control valve 7 after pressure reaches predetermined value.Observation control after five minutes
The variation of platform human-computer interaction interface pressure value, air-tightness is bad if pressure value changes and changes greatly；If pressure value is not
It changes, then air-tightness is preferable.It when air-tightness is bad, answers whether each interface of check device seals, checks out and locate
In the detection for carrying out air-tightness after reason, until keeping device air-tightness in shape.By the upper right corner after air-leakage test
Gas vent 13 is opened, and gas is discharged.
The concrete operation method of experimental provision of the present invention are as follows: as shown in Figure 1, its operating procedure is as follows: first 24 hours of experiment
Clamping device 11 is removed, solid sample is mounted in solid sample disk, and places it in and must make it sufficiently in measurement solution
Infiltration reaches saturation state.Then clamping device is mounted on cabinet, is sealed.Open the gas vent on main body case upper right side
13, open the power supply of console 2, set pressure and temperature value on the human-computer interaction interface on console.Master control system first
It is opened by signal control valve 6, the signal that control valve 6 transfers signals to after opening in turn on the switch controller of water pump 5 connects
It receives on device, control water pump 5 is started to work, will be in the water injection main body case 1 in water tank 4.After main body case fills, gas vent is closed
13.16 real-time working of pressure sensor on internal component 3 transfers signals to master control system when pressure reaches predetermined value.
Then output signal control water pump 5 stops working master control system, and then control valve 6 is turned off, to guarantee box house pressure.Control
After valve 6 processed is closed, master control system receives signal, and then outputs signals on the receiver of TPC heating sheet 17, and heating sheet receives letter
It starts to work after number.The data of the real-time temperature collection sensor 15 of master control system, make heating sheet be in constant temperature keeping warm mode, in turn
The intracorporal temperature of case is set to keep constant temperature.After temperature and pressure reach predetermined value, master control system will output signals to the letter on valve 7
Number receiver, control valve 7 are opened.Air pump 8 receives the signal of master control system by signal receiver, controls the flow and stream of gas
Air-flow is discharged uniformly in speed, guarantees that Air Bubble Size is suitable.If surveying the contact angle under gas with various, need to remove existing gas
Bottle is changed to equipped with specific gas bottle.It is opened after the signal of the reception master control system of annular light source 9, after light source is opened, high definition is taken the photograph
Receiver on camera 10 is started to work after receiving signal, is captured bubble image, computer terminal is transferred to, by using one
The code (KSVCAM200) of image analysis processing image data analyzes each image or so contact angle using program, then basis
Best fit degree calculates left and right contact angle, finally obtains optimum contact angle by analysis.
It uses for reference the prior art and can be realized in the part that the present invention does not address.
It should be understood that any equivalent way that those skilled in the art are made under the introduction of this specification, or
Obvious variant should all be within the scope of the present invention.
Claims (6)
1. a kind of experimental provision for surface of solids wetting contact angular measurement comprising main body case, console, feed liquor unit,
Air admission unit and hold assembly, it is characterised in that:
The hold assembly is mounted in the main body case, and the hold assembly includes a connecting rod and consolidating on connecting rod
Body sample disc, the solid sample disk inner wall are coated with high-temperature and high-presure resistent silica gel；
The upper right corner of the main body case is provided with a gas vent, its lower left corner is provided with a drainage hole, in the main body case
Interior side is provided with connecting rod；
The console is carried out for temperature, the pressure of the experimental provision to be adjusted, and using image capture system
Data acquisition, measured with the wetability to porous media, the console include temperature sensor, pressure sensor,
PTC heating sheet, high-definition camera and computer, the internal component that the temperature sensor and pressure sensor are located at main body case connect
The both ends of bar, the PTC heating sheet are located on the connecting rod, and the temperature sensor, pressure sensor pass through respectively
Route connect with external control system, to capture image, the computer is used for high-definition camera the high-definition camera
The image that machine captures is analyzed, is calculated, to obtain optimum contact angle；
It is provided with an annular through-hole on the main body chamber interior wall of the connecting rod opposite side, and is provided at the annular through-hole
With its shape, the matched ring screw circle of size, it is inlaid with high-boron-silicon glass on the ring screw circle, in the high borosilicate
The edge of glass is installed by annular light source；
The feed liquor unit is used for for providing different wetting agents, the air admission unit into the main body case to main body
Different gas is provided in case, and the feed liquor unit and air admission unit passes through the console and controlled.
2. a kind of experimental provision for surface of solids wetting contact angular measurement according to claim 1, it is characterised in that:
The feed liquor unit includes water tank, water pump, connecting line and control valve, and the connecting line is by water tank and the main body
Case links together, and is connected through a screw thread between the connecting line and the main body case, and junction is sealed processing.
3. a kind of experimental provision for surface of solids wetting contact angular measurement according to claim 1, it is characterised in that:
The air admission unit includes gas charging-tank, air pump, air inlet pipeline and intake valve, described in one end connection of the air inlet pipeline
Gas charging-tank, the other end connect the main body case, and the air pump, intake valve are mounted on the air inlet pipeline.
4. a kind of experimental provision for surface of solids wetting contact angular measurement according to claim 2, it is characterised in that:
The feed liquor unit is located at the lower left of the main body case, and the water tank needs to provide different wetting agents according to experiment,
Signal receiver one is housed, when the temperature sensor and pressure sensor set temperature and pressure value on the control valve
Afterwards, signal is passed to the signal receiver one by the control system of the console, and is carried out by control pump switch
Rise heat boosting.
5. a kind of experimental provision for surface of solids wetting contact angular measurement according to claim 3, it is characterised in that:
The air pump is miniature adjustable speed air pump, and signal receiver two is housed on the intake valve, is connect by signal receiver two
The signal of console is received, and then controls the flow and flow velocity of gas.
6. a kind of experimental provision for surface of solids wetting contact angular measurement according to claim 1, it is characterised in that:
Using the metal flat gasket of forced seal processing, the ring light at the sealing of annular through-hole Yu the ring screw circle
Source is to penetrate light source in focusing.
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| CN201910268375.9A CN109883893A (en) | 2019-04-04 | 2019-04-04 | A kind of experimental provision for surface of solids wetting contact angular measurement |
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| CN201910268375.9A CN109883893A (en) | 2019-04-04 | 2019-04-04 | A kind of experimental provision for surface of solids wetting contact angular measurement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110411904A (en) * | 2019-07-29 | 2019-11-05 | 北京交通大学 | The measuring device of refrigerant working medium contact angle |
| CN112964604A (en) * | 2021-03-25 | 2021-06-15 | 西南石油大学 | Rock contact angle testing device and method considering water saturation and adsorbed gas |
| CN113029871A (en) * | 2021-03-12 | 2021-06-25 | 西安石油大学 | Device and method for measuring contact angle in multi-medium environment under high-temperature and high-pressure conditions |
| CN113740209A (en) * | 2021-09-16 | 2021-12-03 | 哈尔滨工业大学（威海） | Device and method for simulating wetting behavior of plastic on metal surface under specific pressure |
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| CN105334139A (en) * | 2015-11-25 | 2016-02-17 | 华南理工大学 | Instrument and method for measuring contact angle between saturated liquid and solid surface |
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| CN102621042A (en) * | 2012-04-27 | 2012-08-01 | 南京大学 | Device for measuring droplet contact angle and rolling angle under temperature control, humidity control and pressure control condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110411904A (en) * | 2019-07-29 | 2019-11-05 | 北京交通大学 | The measuring device of refrigerant working medium contact angle |
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| CN113740209A (en) * | 2021-09-16 | 2021-12-03 | 哈尔滨工业大学（威海） | Device and method for simulating wetting behavior of plastic on metal surface under specific pressure |
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