Contact Angle Measuring Instrument
Contact Angle refers to the tangent line of the gas-liquid interface at the intersection of gas, liquid, and solid phases. The tangent angle θ between the tangent line on the liquid side and the solid-liquid boundary.
BGD 190 Contact Angle Measuring Instrument is mainly composed of five parts: light source, injection unit, sample table, acquisition system, and analysis software. The equipment adopts the principle of optical imaging and measures the following parameters by image profile analysis:
- The wetting behavior of liquid on solid surfaces, such as spreading, infiltration, absorption, etc. The static contact angle is measured by the sessile drop method.
- Measurement of advancing contact angle (ACA), receding contact angle (RCA), contact angle lag, rolling angle (tilt platform is required), and dynamic contact angle of material on solid surfaces.
- Continuous real-time study and process record of absorbing materials, analysis of contact angle variation curve with time.
- Contact angle measurements of various special materials, such as powders, curved surfaces, super hydrophobic/super hydrophilic samples.
- Test of the contact angle of the material immersed in the liquid by the attachment drop method (quartz sample cell is required).
- Measurement of surface tension, polarity, and dispersion components of various liquid meters by pendant drop method.
- Count surface free energy and analysis of polar dispersion components.
- Analyze the adhesion of liquid on solid surfaces to evaluate the uniformity and cleanliness of solid surfaces, etc.
Features
- Conform to standards: ASTM D724-99(R-2003), ASTM D5946-2004, ISO15989, etc.
- Host construction: The host adopts a high-strength aviation aluminum alloy structure to match the modular design concept and self-developed integrated chip circuit control, comparable to similar international top brands.
- Light source system: Adopt industrial dense adjustable LED cold light source system (life span more than 25,000 hours). The uniform light emission ensures clearer imaging and avoids droplet volatilization caused by additional heat.
- Injection unit: The injection unit adopts micro manual button injection, which is stable and accurate.
- Sample table: The three-dimensional manual fine tuning platform is adopted, which is flexible in operation and accurate in positioning. The sample table can be customized according to the actual sample size.
- High-performance chip: Adopt high-performance SONY industrial chip imported from Japan, and 0.7–4.5 times high-definition industrial-grade continuous ploidy microscope imported from Germany (Max. 60 frames) with 2000W pixels, ensuring the authenticity of images and the best imaging effect.
- USB interface: USB2.0 standard interface is adopted, with fast data transmission speed and high compatibility.
- Calibration sample: The first contact angle measurement calibration sample imported from Germany is provided to ensure the accuracy of the instrument. The angle calibration standard sheet is 3° / 5° / 8° / 60° / 90° / 120° / 115° (optional).
- Flexible acquisition system: The design of the acquisition system is flexible, suitable for most measurement environments, and simple to deal with a variety of complex sample surface measurements.
- Advanced analysis method: Has the most advanced contact angle analysis method in the world, which can meet the accurate fitting of all kinds of droplet imaging, including a unique differential ellipse and differential circle special liquid imaging fitting method.
- Automated fitting: Using the international leading calculation method, the software has realized automatic fitting to avoid the error caused by human operation.
- Bilateral contact angle measurement: With the function of fast fitting of bilateral contact angle measurement, it can comprehensively analyze the surface wetting performance of liquid and solid, and more accurately analyze the actual wetting situation of the surface.
- Dynamic shooting: Dynamic shooting, video fast test data, can continuously record the change of test contact angle, and then automatically batch fit using the software.
- Automatic fitting method: The most advanced contact angle measurement and analysis software in China is an automatic fitting method (one-button automatic fitting, no artificial error), including Circle method, Ellipse/Oblique ellipse, LY, Differential circle / Differential ellipse; Dynamic contact angle fitting (batch fitting of multiple images) includes: Wettability, Video analysis, Surface energy, Adhesion work.
- Report generation: The software automatically generates reports, covering various data reports such as Word form, Excel form, and Spectrograms, etc.
- Accessory options: A variety of accessories can be selected to expand the device's functions and applications.
Main Technical Parameters :
- Contact angle measurement range: 0° - 180°
- Contact angle resolution measurement accuracy: ± 0.001°
- Testing accuracy of contact angle: ± 1°
- Surface free energy: Zisman, OWRK, WU, WU 2, Fowkes, Antonow, Berthelot, EOS, Adhesion work, Wet work, Spreading coefficient.
- Dynamic contact angle fitting: batch screenshot fitting, video continuous automatic fitting and automatic online real-time fitting.
- Surface/interface tension test: Pendant Drop method (real-time full-automatic dynamic surface tension test)
- Droplet state test: Pendant Drop, Sessile Drop (2/3 state), Captive Bubble, Sessile Drop, Sessile Needle
- Advancing contact angle & receding contact angle: method of increase and reduce the drop volume automatically measures the change of advancing angle and receding angle.
- Spectrogram shows: left contact angle, right contact angle and average contact angle.
- Injection unit: special precision syringe with capacity of 500 µL, hand-operated rotary liquid inlet (the drop accuracy can reach 0.1 µL).
- Movement range of the injection unit: 50mm up and down, 50mm left and right.
- Acquisition system adjustment: front and rear 60mm, adjustable viewing angle.
- Working table size: 120mm × 150mm
- Max. width of sample: 200mm (unlimited length).
- Adjustable range of working table movement: (manual, precision 0.1mm); forward and rear stroke 60mm, left and right stroke 35mm, up and down stroke 80mm.
- Standard configuration: digital camera CMOS, high-definition constant-magnification light tube, video cable, dongle, supporting software, power cord, micro-sampler, round horizontal ball, one each; stainless steel needle (equipped with micro-injector), 0.5mm plastic needle (equipped with 1mL syringe), 1.6mm plastic needle (equipped with ml syringe), and five hex wrenches respectively; ten 1mL syringes.
- Optional Accessories: thin film fixture, standard cell, hydrophobic treatment solution, quantitative injection pump, temperature control platform, vacuum platform, electrostatic fan, manual tilt platform, micro injection pump, needle syringe, high-speed camera.
- Ordering Information: BGD 190—Contact Angle Measuring Instrument
