Introduction: This machine is not only able to use the static drop method to test the static contact angle, the hanging drop method to test the surface/boundary tension of the liquid and the droplet outline size, the surface energy estimation model to estimate the solid surface energy and its distribution, but also to focus on the selected With accessories with various expansion functions, roll-off method, card insertion method, and bubble trapping method can be realized to achieve comprehensive and accurate measurement and analysis of dynamic/static contact angle, contact angle of external phase as immiscible liquid, critical micelle concentration, etc. . Widely used for pro/hydrophobicity analysis of solid surfaces, wettability analysis, cleanliness testing, evaluation of treatment effects, and characterization, analysis, speculation or description such as competition, adhesion, wetting, spreading, absorption, penetration, solubilization And other important interface chemical properties. Features: 1. The whole frame: Based on an open design and modular concept, it is easy for the user to approach the various parts of the instrument during operation, with good scalability, and attachments can be added as needed. After the main frame has been professionally designed, it is made of light-weight, high-strength aluminum alloy CNC machining. The surface of the main frame is spray-painted, with stable structure and beautiful appearance. 2. Mechanical positioning platform: Focusing combination positioning table adopts precise differential head drive and threaded screw drive to achieve focal length positioning and pitch angle adjustment Lifting and translation combined sample stage adopts screw thread drive and scissor lifting principle, which can realize a wide range of movement without generating the slightest shake and tilt 3. Precision sampling system: Use rack and pinion and threaded screw to drive sampler and add liquid, optional multiple specifications of liquid sampler 4. Optical Imaging System: The camera uses a high-resolution, high-frame-rate progressive scan CMOS digital camera, which is particularly suitable for the measurement and analysis of dynamic processes that change at high speeds 5. Professional analysis software: Provides various methods such as volume angle method, volume high method, fitting method, automatic method, hanging drop method, insert plate method and bubble trap method Add the appropriate option to test the contact angle between the liquid's static/static contact angle and the external phase immiscible liquid on the solid surface The left and right contact angles can be tested and compared separately. The software automatically calculates the average contact angle. With powerful database management capabilities, saving, printing, raw data query, and re-analysis can be implemented Technical Parameters: Contact angle Measurement methods: sessile drop method, roll-off method 1, insert plate method 2, bubble trap method 3 Calculation methods: Proportional angle method, quantity height method, fitting method, automatic method Measurement results: Left contact angle, right contact angle, average contact angle, droplet contact point coordinate display Measuring range: 0°～180° Measurement error: ±0.1° (θ/2 method) Measurement resolution: 0.01° 2. Liquid table / interfacial tension Measurement method: hanging drop method Measurement results: table/interfacial tension, droplet outline size, droplet contact point coordinate display Measuring range: 0.01 to 1000mN/m Measurement accuracy: ± 0.1% (relative to the measured value) Measurement resolution: 0.001mN/m 3. Solid surface free energy Estimation method: Fowkes one-fluid method, OWRK two-fluid method, Wu harmonic mean two-liquid method, LW-AB three-fluid method Estimated results: solid surface free energy and its dispersive force, polarity force, van der Waals component, Lewis acid/base component 4. Shooting method Single shot: After freezing the image, it can be saved as a bmp image Interval shooting: Set the number of picture frames arbitrarily between 1 and 3600 seconds Continuous capture: continuous shooting at 25 frames/second Video capture: shooting video files saved as playable AVI format 5. Optical imaging system Camera: 1/1.8′′ CMOS sensor, resolution 800×600, frame rate 25 fps Lens: 0.7 to 4.5× zoom, manual focusing, focusing range ±6.5mm Backlight source: LED cold light source, continuously adjustable brightness 6. Sample adding system Sample loading method: manual knob type Displacement accuracy: 1mm 7. Sample table Platform size: L130×W110mm Move left and right: Manual, stroke ±25mm Move back and forth: manual, stroke ± 25mm Move up and down: Manual, stroke ± 25mm Level Control: Level and Software Measurements, Horizontal Foot Leveling Database management: indexing input test information, saving, querying, loading and printing graphic reports, etc. Instrument size: about W480 × D300 × H500mm Instrument weight: about 20Kg Power supply: 1 ∮ AC220V 50HZ
Introduction: This machine is not only able to use the static drop method to test the static contact angle, the hanging drop method to test the surface/boundary tension of the liquid and the droplet outline size, the surface energy estimation model to estimate the solid surface energy and its distribution, but also to focus on the selected With accessories with various expansion functions, roll-off method, card insertion method, and bubble trapping method can be realized to achieve comprehensive and accurate measurement and analysis of dynamic/static contact angle, contact angle of external phase as immiscible liquid, critical micelle concentration, etc. . Widely used for pro/hydrophobicity analysis of solid surfaces, wettability analysis, cleanliness testing, evaluation of treatment effects, and characterization, analysis, speculation or description such as competition, adhesion, wetting, spreading, absorption, penetration, solubilization And other important interface chemical properties.
