The surface tension is an internal force, and surface tension exists even in a balanced state. For example, if the gaseous and liquid states of a substance are simultaneously balanced, the boundary between the two states does not change, that is, there is no force perpendicular to the interface at the interface. The surface tension causes the liquid to shrink its surface area. Reduce unmet chemical prices. Since the spherical surface is the smallest body in the same volume, in the absence of external force (such as in a weightless state), the liquid is always spherical in equilibrium. In liquid droplets (such as water droplets), or in air bubbles in a liquid, the pressure at the interface of the surface tension is higher than the pressure inside the liquid. For the same reason, the pressure inside the soap bubble is higher than the outside. The formula describing this pressure difference is the Yang-Laplace formula. Measuring mercury using a ring, sheet, tension gauge or capillary phenomenon can measure surface tension. One can also optically analyze and measure the suspended droplets to determine the surface tension of the liquid.
Surface tension tester general features:
1) in accordance with ASTM D3825-90 standard;
2) The instrument is a medium-range tension meter with a separate foam flow speed controller that has the basic features of the QC3000 for more accurate testing of a wider range of samples;
3) Compact design, simple and fast operation, and accurate results;
4) It can obtain relevant data of surfactant formulation for research and development;
5) Online environmental analysis is possible;
6) Automatic and accurate determination of surfactant surface rate (from milliseconds to minutes);
7) The latest software, automatic correction function.
Surface tension tester technical features:
1) Adjustable foam rate: maximum: 40 foams/s; minimum: 1 foam/120s;
2) Surface tension and temperature correction (AutoCal) can be performed simply by program;
3) Independently adjustable small and large orifices to precisely adjust the foam speed;
4) Surface Age diffusivity measurement (from milliseconds to minutes);
5) Patent software for vertex detection: accuracy ± 0.1 Dynes / cm (mN / m).
Surface tension tester function use
Main application areas
Research teaching
Quality Inspection
External testing service
The range of services that the surface tension tester can provide
1. Solid material surface contact angle test;
2. Determination of the free energy of the surface of a solid material;
3. Determination of the surface tension of the liquid;
4. Interfacial tension between the two liquids;
5. The adhesion work of the liquid on the solid surface;
6. Hydrophobic material surface advancing angle, receding angle, rolling angle.
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