SCI200Type fully automatic adhesion force measuring instrument

1、 Introduction

1Regarding adhesion force

Adhesive force refers to the ability of a material to adhere to the surface of another material, mainly used to describe the interaction force between the adhering material and the adhered object. Adhesive materials generally refer to fluids (liquids or gases), solids, or soft substances.

Attached object refers to an object (solid or soft substance) with a certain surface/interface.

The magnitude of adhesion force mainly depends on the chemical composition and molecular structure of the adhesive material (the existence state determines the arrangement of molecular structures), as well as the surface characteristics of the adhered object (chemical composition and microstructure, where microstructure includes surface/interface molecular structure and geometric structure), and is also related to external conditions such as the medium (gas, liquid) under which adhesion occurs.

2Characterization of adhesion force

Adhesive force characterizes the force required to separate a droplet from the surface it contacts. It provides a method for quantifying the mutual attraction between liquids and solids.

The adhesion force of a surface to a liquid depends on the wettability of the surface, the volume of droplets, the surface tension of the liquid, and the measurement method used. Under given measurement conditions (such as fixed liquid volume and measurement method), the adhesion force is determined by the contact angle of the surface. More specifically, it is determined by the receding contact angle of the surface. The backward contact angle is the critical contact angle at which the solid liquid gas three-phase line begins to contract. A surface with a larger receding contact angle has lower adhesion.

3Determination of adhesion force

The schematic diagram of the adhesion testing method is as follows. Firstly, the droplets attached to the microbalance come into contact with the surface of the sample, and then slowly separate. During this process, the force displacement curve is recorded using a microbalance. The pull-out force when the surface separates from the droplet is the adhesion force.

4Regarding the surface/interface tension meter

The force generated at the interface between a liquid and another immiscible liquid is called the interfacial tension between the liquid phase and the liquid phase; Meanwhile, we usually refer to the tension between liquid and gas phases as surface tension. For example, at 20 ℃, the surface tension of water is 72.75mN/m, which refers to the surface tension at the interface between water and air.

The fully automatic adhesion force measuring instrument can measure both adhesion force and surface tension. The surface tension meter adopts the most commonly used platinum plate method and platinum ring method in production practice.

5Application Fields

Adhesive force can be used to characterize the hydrophobicity of self-cleaning surfaces. Surfaces with low solid-liquid adhesion are more suitable for self-cleaning applications, etc. The application areas include: indoor research and on-site monitoring of tertiary oil recovery (chemical flooding); Research on surfactant, detergent, emulsion and foam; Research on fuel oil, lubricants, paints, inks, and coatings; Research on pesticides and other related fields.

2、 SCI200 fully automatic adhesion specification parameters

1. Measurement range: 0 millinewtons/meter to 999.999 millinewtons/meter (0mN/m to 999.999mN/m)

2. Sensitivity: 0.001 millinewtons per meter (mN/m)

3. Accuracy: 0.01 millinewtons per meter (mN/m)

4. Adhesive force measurement method: direct measurement by adhesive force module

5. Measurement methods for interfacial tension: platinum ring method, platinum plate method for direct measurement

6. Test types: adhesion measurement, surface tension measurement, interfacial tension measurement, quality measurement

7. Upgradeable optional functions include CMC concentration measurement, density measurement, dynamic contact angle measurement, powder contact angle measurement, fiber contact angle measurement

8. Equipped with magnetic stirring function

9. Quality measurement range: 0-210g

10. Lifting platform range: 0-30mm, moving speed 0.1-2mm/s, lifting platform accuracy: 0.1mm

11. Data acquisition speed: 0.1Hz (0.02Hz optional)

12. High precision mobile platform, precision screw matching servo stepper motor, smooth operation

13. The sensor adopts Mettler's imported high-quality system (high-precision one ten thousandth electromagnetic force sensor), with accurate test data, high precision, good repeatability, and long service life.

14. Compliant with national standards such as GBT 22237-2008, GBT 5549-2010, and GBT 6541-86, as well as industry standards such as SY/T5370-1999 "Methods for Determining Surface and Interface Tension", it is compatible with platinum ring and platinum ring rings, and can measure both surface and interface tension, making it easy for users to compare their data with upstream and downstream units, third-party testing institutions, various national and industry standards.

15. Equipped with PC application software as standard, it can also be connected to a computer to work for a long time on the Windows operating interface, automatically recording tension change curves, conducting real-time observation, and storing and printing.

16. The standard configuration includes a circulation insulation platform that can be connected to an external constant temperature bath, with a built-in temperature sensor. Users can easily connect various constant temperature baths by themselves (the instrument does not include a constant temperature bath as standard, and users can use the original constant temperature bath or request our factory to provide it).

17. Temperature reading accuracy: 0.1 ℃ (measured by a sensitive temperature sensor, optional liquid internal temperature measurement function)

18. SCI200The model has a fully automatic adhesive force, built-in touch LCD screen, and optional roll type printer. It can be operated with one click touch and display and print measurement results in real time, without the need to connect to a computer, printer, tedious operation, calculation, and easy movement;

19. Exquisite structural design, high-precision stepper motor, smooth platform operation, low noise, and more stable lifting. Equipped with hardware and software one click reset function.

20. Equipped with sensor calibration circle code, the instrument calibration is fast, convenient and intuitive, the data is more accurate, and it is convenient for users to connect with internal/external quality management system requirements.

21. The instrument software has built-in calculation and correction formulas, eliminating the need for tedious calculations. One click fully automatic, completely eliminating human error.

22. According to the actual needs of customers and the teaching process, the measurement can be carried out step by step, and there are mandatory platform lifting and lowering functions in software and hardware.

23. Both the platinum ring method and the platinum plate method can be used to measure the corresponding surface tension and interfacial tension as time or concentration changes.

24. The instrument is not only suitable for measuring almost all low viscosity liquids, but also for measuring most medium to high viscosity liquids, achieving testing of adhesion and surface/interface tension in industries such as ink, paint, and petroleum.

25. We have completely independent intellectual property rights, a complete after-sales guarantee system, and provide free on-site installation, debugging, and training services, as well as lifelong free software upgrades, to maximize the protection of users' rights to continuous high-quality software and hardware services.

26. Power: 150W

27. Working humidity: 30% to 85% relative humidity

28. Voltage power supply: AC220 ± 5V