As is well known, nanomaterials science and engineering have become a global research hotspot. When studying surface modification of nanomaterials, the concept of wetting contact angle is often involved. The so-called contact angle refers to the angle formed when a liquid droplet is dropped on a horizontal plane of a solid, and the gas-liquid interface and the two tangent lines of the solid-liquid interface sandwich the liquid phase at the boundary point of the solid liquid gas three-phase on the surface of the solid.

Surface energy is a measure of the chemical bond breaking between molecules when creating a material surface. In solid-state physics theory, surface atoms have more energy than atoms inside a substance. Therefore, according to the principle of minimum energy, atoms will spontaneously tend towards the interior of the substance rather than the surface. Another definition of surface energy is the excess energy on the surface of a material relative to its interior.

The tensile force exerted by the interaction between any two adjacent parts of a liquid surface perpendicular to their unit length boundary. The formation of surface tension is closely related to the special stress state of molecules located within a thin layer of liquid surface. The existence of surface tension forms a series of special phenomena that can be observed in daily life.

Instrument application field

TFT-LCDPanel industryMeasurement of cleanliness and coating quality of glass panels;TFTPrinting circuit, color filterLight filmITOMeasurement of pre coating quality of conductor film and other materials

Printing and plastic industrySurface cleaning and adhesion quality measurement; Ink adhesion measurement; Compatibility measurement of adhesive colloidal properties; Tightness of dye

semiconductor industryMeasurement of cleanliness of wafers;HMDSProcessing control;CMPResearch on Measurement, Photoresistance, and Developers

Research on Chemical MaterialsResearch and discussion on waterproof and hydrophilic materials; Surface activity and the tension and wettability of cleaning agents; Viscosity enhancement and measurement of adhesion surface energy

ICencapsulationSubstrate surface cleanliness; Atomic synthesis oxidation recognition;BGAWelding surface; Measurement of adhesion of epoxides

Instrument Introduction

Water droplet angle measuring instrumentSDR-70DMade with modern technology, the instruments are advanced and specializedCCDDigital camera with high resolution zoom microscope and high brightnessLEDThe background light source system, combined with a 3D sample stage, can move the worktable in up and down, left and right, front and back directions. Realize micro injection and precise movement up and down, left and right. At the same time, a telescopic pole structure workbench was also designed, which can adapt to situations where the material thickness increases for different users. The instrument framework can be adjusted appropriately according to the size of the style, expanding the range of use of the instrument. The software is equipped with correction functions, and the results of multiple tests can be saved in the same report at the same time, which allows users to better control material data. The instrument is designed to be aesthetically pleasing, easy to operate, and meets the needs of users. Suitable for users in various industries who measure contact angle

Requirements for improving quality control:

Optical contact angle measuring instrument:It is a simple, fast, and sensitive method for measuring the wettability of solid surfaces. And it can indirectly measure the surface energy of solids and the surface tension of liquids. The following is a comparison table of testing methods:

Product Features

1Adjustable single wavelength industrial gradeLEDLight source; The image is clearer; The service life can reach15000Habove

2、 Adopting high-performance imported movements from Japan to ensure the best imaging effect.

3AdoptingUSB2.0Standard interface, fast data transmission speed, high compatibility

4High strength aviation aluminum alloy structure, modular design concept, can be configured with various commonly used measurement accessories

5、 The first domestic provider of contact angle measurement calibration samples imported from Germany, ensuring accurate and error free measurement results (optional)

6The most professional contact angle analysis method, more suitable for measuring contact angles of various materials

7Adopting internationally leading calculation methods, it can automatically identify reference lines and contour lines without human error

8High speed fully automatic operation measurement, and intuitive reading of data results

9Surface contact angle analysis module, simpler operation, more accurate results

10Video rapid testing data, capable of continuously testing changes in contact angle morphology

11Multiple data export functions, one click export of measurement data for experimental reports

instrument parameters

1Range of contact angle measurement:0-1800

2Accuracy of contact angle measurement: ±0.10

3High precision droplet system: differential head+Blue core syringe; Drip accuracy0.5Ml

4Contact angle high-precision instrument calibration sheet: German imported contact angle calibration standard sheet3°5°8°60°90°120°115°

Professional measurement method for contact angle

1Seat drip method（sessile drop）;

2Thin membrane method（lamella method）;

3The method of capturing bubbles（Captive bubble method）;

4Fiber wrapping method（wetted fiber）;

5Fiber seat drip method（sessle fiber drop）;