Contact angle measuring instrument

Contact angle is the angle θ between the gas-liquid interface tangent at the point where the gas, liquid, and solid phases meet and the solid-liquid interface on the liquid side. Contact angle measurement is currently the main method for surface property detection. The SDC-200S research-type contact angle measuring instrument uses the principle of optical imaging. The equipment uses image profile analysis to measure the contact angle, wettability, interfacial tension, advancing and receding angles, surface energy, and other properties of the sample surface. The equipment uses a fully automatic liquid feeding device, with high cost performance, strong scalability, and functionality, and can meet various conventional measurement needs. It is currently widely used in numerous universities, research institutes, and enterprises.

I. Overview (Summary)

Contact angle Contact angle refers to the angle formed by the tangent to the gas-liquid interface at the point of intersection of the three phases (gas, liquid, and solid) three phases at the intersection point of the gas-liquid interface, the angle between the tangent on the liquid side and the solid-liquid interface angle θ. Contact angle measurement is currently the main method for surface property detection.

SDC-200S Research Contact Angle Meter The SDC-200S research-type contact angle meter uses the principle of optical imaging. The equipment uses image profile analysis to measure the sample surface contact angle 、 wetting performance 、 surface tension, advancing and receding angles 、 surface energy etc. The equipment uses a fully automatic liquid dispensing device, with high cost performance, strong scalability, and comprehensive functions. It can meet various conventional measurement needs and is now widely used in numerous universities, research institutes, and enterprises.

II. Application

Contact angle meters are widely used in various industries, including mobile phone manufacturing, glass manufacturing, surface treatment, materials research, chemical engineering, semiconductor manufacturing, coatings and inks, electronic circuits, textiles and fibers, and medical biology. Contact angle measurement has become an important instrument for evaluating surface properties. (Some testing functions require the purchase of special accessories.)

1. Spreading, penetration, and absorption of liquids on solid surfaces, sessile drop method for measuring static contact angles;

2. Measurement of advancing angle, receding angle, contact angle hysteresis, rolling angle, and dynamic contact angle of materials on solid surfaces;

3. Continuous real-time research and process recording of absorbent materials, analysis of contact angle change curves over time;

4. Contact angle measurement of various special materials, such as powders, curved surfaces, superhydrophobic/superhydrophilic samples;

5. Attached drop method for testing the contact angle of materials immersed in liquids;

6. Pendant drop method for measuring the surface and interfacial tension of various liquids and their polar and dispersive components;

7. Calculation of solid surface free energy and analysis of its polar and dispersive components;

8. Analysis of the adhesion work of liquids on solid surfaces, evaluation of the uniformity and cleanliness of solid surfaces.

III. Principle

As shown in the figure above, the contact angle meter mainly consists of light source, injection unit, sample stage, acquisition system, and analysis software five major parts, and the equipment uses the principle of optical imaging.

Light source: Uses a dense LED cold light design, with uniform light emission, clean images, and a long lifespan;

Injection unit: Uses a high-precision injection pump for liquid dispensing, controlled by software for quantitative and constant speed, with stable droplet dispensing and accuracy up to 0.01 microliters;

Sample stage: Uses a three-dimensional manual fine-tuning platform, with flexible operation and accurate positioning. The sample stage can be customized according to the actual sample size;

Acquisition system: Uses an imported monochrome CCD camera, with stable shooting, clear images, and reliable results. The lens uses imported German industrial-grade configuration, with 10x magnification adjustable, and imaging without distortion;

Analysis software: Powerful functions, with one-button fully automatic fitting capability, and the most advanced fitting methods internationally, meeting the precise fitting of various droplet shapes;

IV. Specifications

1. GB/T 24368-2009 (Detection of hydrophobic pollutants on glass surfaces);

2. SY/T5153-2007 (Determination of wettability of reservoir rocks);

3. ASTM D 724-99 (2003) (Test method for surface wettability of paper);

4. ASTM D5946-2004 (Measurement of contact angle of plastic films with water);

5. ISO15989 (Measurement of water contact angle of corona-treated plastic films and sheets);

6. Product Features (Product features)

1. The main unit adopts a high-strength aviation aluminum alloy structure with a modular design concept, independently developed integrated chip circuit control, adopts the design essence and configuration of international imported contact angle equipment, ensuring that the instrument has extremely strong stability;

2. Adopts an industrial-grade dense adjustable LED cold light source system (life more than 50000H), ensuring clearer imaging and avoiding the evaporation of small droplets caused by extra heat;

3. Adopts high-performance Japanese imported industrial movement and industrial-grade telecentric zoom lens, which can basically achieve distortion-free image, ensuring imaging effect;

4. Adopts USB3.0 standard interface, fast data transmission speed, high compatibility, and strong imaging stability;
5. The first domestic company to provide German imported contact angle measurement calibration samples to ensure the accuracy of the instrument, angle calibration standard plates 3°, 5°, 8°; 60°, 90°, 120°; 115° (optional);
6. The acquisition system design is flexible and suitable for most measurement environments, easily handling various complex sample surface measurements;
7. Possesses the world's most advanced contact angle analysis methods, meeting the precise fitting of all types of droplet imaging, including Shengding's unique differential ellipse and differential circle special liquid imaging fitting methods;
8. Uses internationally leading calculation methods, the software has realized fully automatic fitting to avoid errors caused by manual operation;

9. Has a fast fitting function for bilateral contact angle measurement, more comprehensively analyzes the surface wettability of liquid and solid, and more accurately analyzes the actual wetting situation of the surface;
10. Dynamic shooting, fast video testing data, can continuously record the changes in the test contact angle, and then automatically batch fitting by the software;
11. The software automatically generates reports, including various data reports in Word format, Excel format, and spectral format;
12. Has a forward and backward angle measurement function, which is convenient for measuring the stability performance of the sample surface; has a variety of optional functional components, our R&D team is strong and can meet the various customized measurement requirements put forward by customers;
13. Uses internationally leading calculation methods, the software has realized fully automatic fitting to avoid errors caused by manual operation;

. Has a fast fitting function for bilateral contact angle measurement, analyzing the surface wettability of liquid and solid, and more accurately analyzing the actual wetting situation of the surface;
14 15. Dynamic shooting, fast video testing data, can continuously record the changes in the test contact angle, and then automatically batch fitting by the software;
16. The software automatically generates reports, including various data reports in Word format, Excel format, and spectral format;
17. Has a forward and backward angle measurement function, which is convenient for measuring the stability performance of the sample surface; has a variety of optional functional components, our R&D team is strong and can meet the various customized measurement requirements put forward by customers;
7. Optional Accessories (Optional Accessories)

Film Fixture