High-Temperature Contact Angle Tester—Unveiling the Thermodynamic Guardian of Surface Properties
2024-04-15
A high-temperature contact angle goniometer is an advanced instrument used to investigate the surface properties of materials, operating on the principle of measuring the contact angle between a liquid droplet and a solid surface at elevated temperatures. This paper provides a detailed description of the instrument’s operating principles, procedural steps, and post-use maintenance. Thermal Analyzer Manufacturer Sharing
I. Operating Principle:
Droplet formation: A microinjector pump or a precision syringe is used to generate a stable droplet of the liquid sample with a defined diameter.
Temperature Control: The entire system is heated using a heating device to reach the desired test temperature.
Coating the solid surface: Gently place the formed droplet onto the solid surface to be tested, ensuring complete contact with the surface.
Contact angle measurement: The contact angle between a liquid droplet and a solid surface is recorded and analyzed using a camera and image-processing software.
Data analysis and computation: Based on the obtained data and relevant formulas, calculate the contact angle between the liquid droplet and the solid surface.
II. Operating Procedures:
Sample Preparation: Cut, polish, and thoroughly clean the solid sample to be tested, ensuring a smooth surface free of impurities.
System Setup: Set the appropriate temperature and other parameters according to the experimental requirements, and perform system warm-up.
Droplet formation: An appropriate volume of the liquid sample to be tested is injected using a microsyringe pump or a precision syringe, thereby forming a stable droplet with an optimal diameter.
Heating operation: Activate the heating device to rapidly raise the temperature of the entire system to the desired test temperature.
Measurement and Recording: After the target temperature is reached, a liquid droplet is placed on a solid surface, and its contact angle is recorded by capturing images with a camera.
III. Post-Use Maintenance:
Cleaning and Disinfection: After each use, instrument components and all related accessories should be cleaned promptly. Parts that are intended for repeated use may be thoroughly disinfected.
Regular Calibration: Periodically inspect and calibrate the measurement system to ensure its accuracy and reliability.
Instrument maintenance: Remove dust, dirt, and other contaminants, and take precautions against corrosion and damage.
High-temperature contact angle testers not only provide critical parameters for characterizing material surface properties, but are also widely used in coatings, electronic components, high-temperature heat exchangers, and other fields. As the thermodynamic guardian of surface properties, they drive technological innovation and industrial development.
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