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Equipos y ensayos para control de calidad

DCATS

Software modules for DCAT instruments.

The newly developed, Windows® based, DCATSoftwareis available in various discretely usable modules, and is operable traditionally, using mouse and keyboard, or on multi- touch notebooks/pads by finger/pen.

The available modules are:

DCATS 31 — surface/interfacial tension

  • With Du Noüy ring method evaluated surface tension
  • Measurement of the static, time- and temperature-dependent surface and interfacial tensions according to the Du Noüy ring method, the Wilhelmy plate method.
  • Automatic ring corrections according to Zuidema & Waters, Mason & Huh und Harkins & Jordan
  • Gas and liquids database

DCATS 32 — dynamic contact angle

  • Contact angle hysteresis
  • Force-based measurement of the dynamic contact angle of prismatic and cylindrical solids (e.g. plates, films, rods and single fibres) as well as the wetted length according to the Wilhelmy method.
  • Adsorption measurement on powders and fibre bundles with the determination of the average contact angle according to the modified and the extended Washburn method.
  • Analysis of the surface free energy of solids as well as their components (e.g. dispersive, polar and hydrogen bond parts, acid and base portions, respectively) according to nine different theories.
  • Calculation and presentation of wetting envelope and work of adhesion/contact angle diagrams.

DCATS 33 — CMC

  • Determination of the critical micelle formation concentration
  • Fully automatic determination of the critical micelle formation concentration (CMC) of surfactants.
  • Calculation of the minimum surface tension in case of synergistic effects of surfactant mixtures.
  • Calculation of the space required by molecules on the surface
  • Calculation of the free adsorption energy after Gibbs
  • Calculation of the surface excess
  • Automatic control of the dosing devices LDU x/x for additive and subtractive dosing

DCATS 34 — liquid density

  • Determination of the density of liquids with the optional density determination set DIS 11.

DCATS 35 — sedimentation/penetration

  • Particle size distribution of a sedimentation measurement
  • Determination of the sedimentation rate
  • Measuring of the yield forces on soft gels, pastes etc.
  • Measuring of the penetration resistance and penetration rate

DCATS 36 — solid density

  • Determination of the density of solids with the optional density determination set DSS 11 / 12

DCATS 37 — adhesive force

  • Lamella detachment experiment
  • measurement of force-distance diagrams during pressing on and pulling off of liquid drops on solid surfaces for adhesion analysis
  • image processing (contact angle, contact area, etc.) of video sequences correlated with the measurement (optional Up-Video DCAT required)

DCATS 38 — surface pressure

  • Surface pressure during compression and relaxation
  • determination of the surface pressure of a monolayer during its compression and relaxation in the Langmuir trough module LTM
  • kinetic measurements under isobaric or isochoric conditions to analyse dynamic processes in a monolayer in the LTM
  • interfacial rheological analysis of viscoelastic monolayers in the LTM
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