Contact Angle Measuring Device used to Accurately Quantify the
Wetting Behavior of Liquids on Solid Surfaces
Contact Angle Measuring Device
A·Summary
The Contact angle refers to the Angle between the solid-liquid
interface and the gas-liquid interface from the inside of the
liquid at the junction of the solid, liquid and gas three phases.
Contact Angle measurement technology can not only be used to
characterize the surface properties of common materials, but also
has important applications in the petroleum industry, flotation
industry, pharmaceutical materials, chip industry, low surface
energy non-toxic anti-fouling materials, ink, cosmetics,
pesticides, printing and dyeing, paper making, fabric finishing,
detergent, spraying, sewage and other fields.
Contact Angle measuring instrument is widely used in various
industries, in mobile phone manufacturing, glass manufacturing,
surface treatment, material research, chemical industry,
semiconductor manufacturing, paint ink, electronic circuit, textile
fiber, medical biology and other fields, contact Angle measurement
has become an important instrument to evaluate surface properties.
B·Application
The contact Angle measuring instrument adopts the principle of
optical imaging, and measures the contact Angle, wettability
energy, surface interface tension, surface energy, tilt Angle and
other properties of the sample surface through image profile
analysis. At present, it has been widely used in many colleges and
universities and enterprises.
1. The wetting behavior of the liquid on the solid surface such as
spreading, penetration and absorption, and the static contact Angle
is measured by the seat drop method;
2. Dynamic contact Angle measurement of material on solid surface,
real-time automatic fitting;
3. Continuous real-time research and process recording of absorbing
materials, and curve analysis of contact Angle changes with time;
4 Contact Angle measurement of various special materials, curved
concave and convex surfaces, super hydrophobic/super hydrophilic
samples;
5. Suspension drop method is used to measure the interfacial tension of
various liquid surfaces and its polarity and dispersion components;
6. (Surface free energy)
7. Adhersion,spreading coefficient,Evaluate solid surface
uniformity, cleanliness, etc.
C· Principle
The contact Angle measuring instrument mainly consists of six
parts: main machine, light source, injection drip system, sample
table, imaging acquisition system and analysis software. The
equipment adopts the principle of optical imaging.
1. The host adopts high-strength national standard aluminum alloy
structure, with modular design concept, self-developed integrated
chip circuit control, adopts the essence and configuration of
imported contact Angle equipment, and the whole machine is simple
and convenient to use without subsequent calibration, and the whole
machine is stable and durable.
2.The light source adopts industrial-grade blue adjustable LED cold
light source (life above 50000H), the light is uniform and stable,
and the liquid volatilization caused by extra heat can be avoided.
3.The high precision electric control unit of the injection
dropping system, with software control, the dropping accuracy can
reach 0.1uL. 500uL dedicated quartz microfeeder, durable and free
from liquid corrosion.
4.The sample table adopts a three-dimensional mobile platform,
which can achieve 0.1mm high precision up and down, left and right
front and back movement control.
5.The camera of the imaging acquisition system adopts Daheng image
1280*1024 professional CMOS digital camera, the frame rate can
reach 30fps, the shooting is stable, the image is clear and true.
Lens adopts 0.6-4.5 times HD industrial continuous magnification
microscope, imaging without deformity and distortion.
6. Includes video playback, data saving and report export functions
D·(Specifications)
Host parameter |
Overall dimension | 800mm(L)×270mm(W)×660mm(H) |
Weight | 20KG |
Power | 220V / 60HZ |
Light source system |
Illuminant | LED adjustable blue tone industrial cold light source, knob +
software exposure adjustment |
Life span | Service life of more than 50,000 hours |
Dropping liquid |
Dropping liquid | Special high precision quartz microfeeder, capacity 500μL |
Dropping liquid moving range | Top and bottom 500mm/Left and right 50mm |
Dropping liquid mode | Software control automatic drops, drop accuracy 0.1μL |
Dropping liquid | 1. The motor control moves up and down to locate the liquid. 2.
Manually move the loading platform up and down to pick up the
liquid |
Acquisition system |
Image system | Daheng image 1280*1024 professional CMOS digital camera /30fps |
Lens | 0.7-4.5x HD industrial grade continuous variable magnification
microscope |
Sample table size |
Stage size | 200mm(L)×160mm(WCan ensure 0.96 to 7 inch product use |
Object stage move range | Up and down40mm,Left and right35mm,Fore and aft30mm |
Analysis software |
Contact Angle measurement range | 0~180° |
Contact Angle measurement accuracy | ±0.1°,resolution ratio:0.001° |
Analytical ability | Full automatic: circle/ellipse/oblique ellipse fitting, inclined
plane fitting, concave/convex plane fitting, real-time dynamic
measurement, video playback dynamic measurement. |
Manual: flat/inclined two-point method, concave/convex nine-point
method. |
Surface energy algorithm | OWRK,Zisman,Fowkes,WU,EOS |
Surface/interfacial tension measurement range | 0-2000mN/m |
Table interfacial tension measurement accuracy | 0.01mN/m |
Test the droplet status | Hanging drop method, seat drop method |
Table/interfacial tension test | Hanging drop method |
Data preservation | Supports image and data saving, output report printing and call-in
re-analysis |
computer | Windows 10 and above |
Instrument configuration |
Software key | 1pcs |
Calibration TAB | 15°45°60°90°135°165° |
Microfeed | Needle tube1pcs needle head5pcs |
E· Accord with national standard
1.GB/T 24368- - 2009
2.SY/T5153- - 2007
3.ASTM D 724- - 99
4.ASTM D5946- - 2004
5.ISO15989
