OPTICAL & FORCE TENSIOMETRY SERVICES

SURFACE FREE ENERGY | INTERFACIAL SURFACE TENSION | CRITICAL MICELLE CONCENTRATION | CONTACT ANGLE

SURFACE FREE ENERGY | INTERFACIAL SURFACE TENSION | CRITICAL MICELLE CONCENTRATION | CONTACT ANGLE

SURFACE FREE ENERGY | INTERFACIAL SURFACE TENSION | CRITICAL MICELLE CONCENTRATION | CONTACT ANGLE

DEFECT ANALYSIS WITH TENSIOMETRY

ADHESION FAILURE | IDENTIFY UNKNOWN SURFACE CONTAMINATION | COATING DEFORMITIES | INCONSISTENT FILM THICKNESS

ADHESION FAILURE | IDENTIFY UNKNOWN SURFACE CONTAMINATION | COATING DEFORMITIES | INCONSISTENT FILM THICKNESS

ADHESION FAILURE | IDENTIFY UNKNOWN SURFACE CONTAMINATION | COATING DEFORMITIES | INCONSISTENT FILM THICKNESS

MATERIAL TESTING & CHARACTERIZATION

LIQUID-SOLID INTERFACE | LIQUID-LIQUID INTERFACE | WETTABILITY | SURFACE TENSION

LIQUID-SOLID INTERFACE | LIQUID-LIQUID INTERFACE | WETTABILITY | SURFACE TENSION

LIQUID-SOLID INTERFACE | LIQUID-LIQUID INTERFACE | WETTABILITY | SURFACE TENSION

TALK TO OUR TEAM

ONE-ON-ONE CONSULTATION | RESPONSIVE | RELIABLE | DEPENDABLE

ONE-ON-ONE CONSULTATION | RESPONSIVE | RELIABLE | DEPENDABLE

ONE-ON-ONE CONSULTATION | RESPONSIVE | RELIABLE | DEPENDABLE

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Tensiometry & Contact Angle Measurements

We offer static and dynamic optical and force tensiometry for surface tension, contact angle, and surface free energy measurements with high precision.

Theta-flex

Standard Capabilities

Static contact angle (Sessile drop or meniscus methods):

Use contact angles to test hydrophobicity/hydrophilicity, the efficacy of surface treatments, and characterize the wettability of your substrate.

Dynamic contact angle (Tilting stage, Wilhelmy plate, fiber, or advancing/receding drop volume methods):

Advancing and receding contact angles, and contact angle hysteresis, indicate surface chemical or topographical heterogeneity, predict wetting behavior of liquids in porous media, predict coating behavior, and many other application areas.

High pressure contact angle (Sessile drop):

Contact angle measurements at up to 400 bar (5800 psi) and 200 °C can provide wettability information for oil reservoir mineral surfaces at relevant pressures and temperatures.

Surface free energy measurement (Sessile drop, Wilhelmy plate, meniscus, or Washburn methods):

Surface free energy uses contact angle measurements from several probe liquids to paint a more complete and quantitative picture of your surface’s wetting properties, including contributions from polar, dispersive, and acid/base molecular interactions.

Powder wettability measurement (Washburn method):

This technique can determine the contact angle between a solvent and powder or particles, such as powders relevant to pharmaceuticals, cosmetics, and more.

Roughness-corrected static contact angle (Sessile drop method with topography measurement):

This technique involves a precise roughness measurement followed by a contact angle measurement at the same location to provide a more complete picture of wettability. The roughness-corrected contact angle indicates the wettability due to the substrate’s chemistry while the measured contact angle includes contributions from roughness.

Standard Capabilities Continued

Surface tension (Pendant drop/bubble, Du Nouy ring, or Wilhelmy plate methods):

We offer several surface tension methods including low volume techniques and both dynamic and equilibrium measurements.

Interfacial tension (Pendant drop, Du Nouy ring, or Wilhelmy plate methods):

Several methods for interfacial tension measurements between two immiscible liquids, such as oil-water systems, are available.

High pressure interfacial tension (pendant drop):

Interfacial tension measurements at up to 400 bar (5800 psi) and 200 °C are available to mimic real environments such as oil field reservoirs, boilers, and other systems.

Critical micelle concentration (CMC) (Pendant drop/bubble method, Du Nouy ring method, or Wilhelmy plate method):

Surface or interfacial tension measurements over a wide range of surfactant concentrations are used to establish a surface tension vs concentration isotherm and determine the CMC.

Dilational interfacial rheology (Pulsating drop/bubble method): 

For materials that form viscoelastic films, this technique provides a complex dilational modulus for the drop surface including viscous and elastic components.

Liquid Density (Buoyancy force measurement):

The density of a liquid is measured with high precision by measuring the buoyancy of a solid with well-defined geometry when it is immersed in the liquid.

Technical Specifications

  • Contact angle range: 0-180°
  • Contact angle resolution: 0.01°
  • Surface and interfacial tension range: 0.01-2000 mN/m
  • Surface and interfacial tension resolution: 0.01 mN/m
  • Density range: up to 2.2 g/cm3
  • Density resolution: 0.0001 g/cm3
  • Tilting stage range for dynamic contact angles: 0-90°
  • Temperature range: 0-250 °C
  • Pressure range: 0-5800 psig.

Sample Requirements

Approximate minimum liquid sample volumes (please inquire for your specific measurement):

  • Surface tension (pendant drop): 100 μL
  • Surface tension (Wilhelmy plate and Du Nouy ring): 10 mL
  • Contact angle (sessile drop): 100 uL
  • Contact angle (Wilhelmy plate or fiber): 10 mL
  • Density: 10 mL

Solid sample requirements (please inquire for your specific measurement):

  • Contact angle (Washburn method): 2 g of powder
  • Contact angle (sessile drop): sample thickness <100 mm, width <320 mm
  • Contact angle (Wilhelmy method): >1 cm width, please inquire
  • Contact angle (fibers): >10 μm thickness, please inquire

Ideal Uses

  • Characterization of coatings, films, fibers and powders to investigate their hydrophobic/hydrophilic and wetting properties
  • Investigate changes in surface finish
  • Measure physical properties of materials
  • Raw materials fingerprinting
  • Check for cleanliness and contamination (potentially in conjunction with other methods)
  • Quality assurance and quality control

Questions about our Tensiometry capabilities?

Contact us for additional information.