What is droplet angle, what is its function, and what are the applicable fields?

The waterdrop angle surface analyzer is a powerful surface treatment, coating, or cleaning instrument that can measure wettability freely and quickly through the surface. With just a gentle tap, the droplet angle can be measured for parallel droplets of two liquids, and then the contact angle and surface free energy can be directly calculated. All steps are automated and can be completed in just one second, providing ample evidence for the general wettability and adhesion of water or organic liquids.

Due to the use of reliable and pre-defined measurement procedures, results unrelated to the user are guaranteed, and errors caused by improper operation are almost eliminated.

The current scope of application for droplet angle includes the following: portable droplet angle measuring instruments are mainly used to measure the contact angle between liquids and solids, that is, the wettability of liquids and solids, as well as the measurement of the external contact angle of liquids. 

The instrument can measure the contact angle of various liquids with various materials. The water droplet angle measuring instrument has become an important instrument for evaluating surface properties in fields such as mobile phone manufacturing, glass manufacturing, surface treatment, material research, chemical engineering, semiconductor manufacturing, ink, electronic circuits, textile fibers, medical biology, etc. Today, let's delve into the equipment principle, measurement method, and application role of water droplet angle with the help of the editor.

1. The principle of the waterdrop angle measuring device is as follows: the waterdrop angle measuring instrument is mainly composed of a light source, a sampling unit, an acquisition system, and analysis software. The device adopts the optical imaging principle, and the light source adopts a dense LED cold light design, with uniform illumination, clear imaging, and long service life; The injection unit adopts a manual knob for precise dripping, with stable dripping and high accuracy; The acquisition system adopts a micro industrial microscope and CCD camera, which ensures stable shooting, clear imaging, and reliable authenticity; The lens adopts industrial configuration, and the imaging is distortion free. The analysis software has powerful functions and strong one click automatic fitting ability. It is equipped with fitting methods to meet the fitting of various water droplet shapes. The LED cold light source is continuously adjustable and has a service life of over 20000 hours.

Industrial camera system with 1.3 million black and white pixels, imported CMOS sensor chip 1/1.8 inch, video speed up to 30 per second, injection accuracy of ± 0.1ul, single tube liquid can be continuously measured more than 200 times, adjustment range of 25mm, accuracy of 0.1mm.

2. Common fitting methods include: tangent method, circle method, ellipse method, differential circle method, differential ellipse method, left and right contact angle method; The application programs include: a water droplet angle measuring instrument that can measure the wettability before coating or bonding, its effectiveness, surface cleaning quality assurance, and quality assurance for plasma treatment, flame treatment, or corona treatment during the activation process; The effectiveness testing of hydrophobic coatings and other coatings, measuring large workpieces and finished products (such as car bodies, parts or walls), measurement method: parallel droplet contact angle, can make the surface tension use the completely symmetrical droplet curvature on a circular sample base.

3. The surface free energy of solids is calculated from contact angle data, measured continuously for 20 times, and the results are displayed together. In a custom designed complex automation system, the measurement results include: contact angle refers to the adhesion between two liquids, surface free energy, interfacial tension between solids and liquids,

4. The water droplet tester is used to measure the wettability of liquids on solids by measuring the contact angle between liquids and solids, calculating and measuring the free energy, adhesion, tension, and other parameters of liquids. For scientific research and teaching purposes in the fields of medicine and insulation materials, Guangdong Intelligent Equipment Co., Ltd., in response to market demand, produces a series of water droplet angle measuring instruments that can provide different types of instruments according to users' different needs. Currently, there are static and dynamic equipment such as fully automatic and semi-automatic water droplet angle measuring instruments. The water droplet angle measuring instrument 

currently measures the solid contact angle (water droplet angle) and uses advanced optical video measurement technology to transmit high-precision industrial camera images to computers for data processing. It has complete functions, is very easy to operate, and meets environmental quality system standards. Nowadays, water droplet angle measuring instruments are widely used for quality testing in manufacturing enterprise laboratories and university research institutions.

The characteristics of water droplet angle are:

1. Advanced CCD digital cameras with high resolution, high precision, and high-resolution digital high-definition, with a maximum resolution of 1280x1024 and frame rates of 15 or 45 frames per second. High brightness LED background light source system, uniform emission, and continuously adjustable brightness;

2. The contact angle method is used to measure the surface tension of solids, and the automatic calculation function includes: 012 method and tangent method to calculate the contact angle, which can be automatically or manually calculated (corrected); Comparison of left and right contact angles; Multi point contact angle comparison; Single liquid and double liquid surface free energy, droplet volume.

3. Calculate solid adhesion: a dynamic contact angle analysis system that can continuously take photos, automatically record changes in contact angle at different times, and analyze forward angle, backward angle, tilt angle, and rolling angle; Using the hanging method to measure the surface tension of liquids can accurately and conveniently find the horizontal baseline; The test results are saved in the database in the form of a test report.

In summary, droplet angle testing is a widely used method to determine the presence of AF waterproof coatings. By placing water droplets on the surface of the coating, we can observe the contact angle they form. Hydrophobic coatings exhibit higher contact angles, allowing water droplets to easily slide off, while excellent waterproof coatings have larger droplet angles, allowing water droplets to freely roll on the surface.