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System for measuring the surface tension, interfacial tension and contact angle on solids, fibers and powders


Instrument name: Force Tensiometer Krupp - K100

The K100 measuring methods run with pre-prepared templates that standardize the fully automated procedures down to the smallest detail, thus providing maximum repeatability. All raw data and results are clearly shown in several tiles that are custom-made for each method. Functions for comprehensive reports and data export as well as a fast access to result comparisons of up to 20 measurements make ADVANCE software a powerful tool for managing and evaluating your data.


Measuring methods and options:
  • Surface tension and interfacial tension using the ring, plate and rod method.

  • Surface tension and interfacial tension using the ring tear-off method, for example for measurements in accordance with ASTM D-971.

The ring tear-off method is a variant and historical predecessor of the Du Noüy ring method as it is used today for measuring surface tension or interfacial tension. Instead of repeatedly detecting the maximum force by cyclic elongation and relaxation of the lamella as is usual with modern tensiometers, the lamella is overstretched until it breaks, so that only one value is determined per measurement.
  • Contact angle and surface free energy of solids, powders or fiber bundles.


Surface free energy (SFE) is the work that would be necessary to increase the surface area of a solid phase. SFE has a decisive influence on the wettability of solids by liquids. It is therefore an important parameter for the optimization of coating processes, but also for any other type of solid-liquid contact.

  • Sedimentation behavior of dispersions.

  • Penetration resistance of sediments.

Applications:

  • Wetting behavior of tablets, pharmaceutical active ingredients and excipients
  • Wetting of varnishes and paints
  • Wetting and adhesion of coatings
  • Wetting properties of inks
  • Wetting of fiber bundles and textiles
  • Development of cosmetic products
  • Sedimentation and ductility of dispersions
  • Checking of surface modifications.


Contact angle glass slide - octanol