Wettability

The Wettability platform characterises the wetting ability (hydrophilic/hydrophobic nature) of surfaces and measures the superficial or interfacial tension of liquid.

 

Leader

Kunemann Philippe
Contact : philippe.kunemann@uha.fr

Description

Areas of activity :
The Wettability platform includes a goniometer and two tensiometers. These devices characterise the (wetting) ability (hydrophilic/hydrophobic nature) of solid surfaces (plate, fibre, powder) and measure the superficial or interfacial tension of liquid. Measurements of dynamic or static contact angles determine the surface energy of a solid or superficial energy of a liquid. Accessories such as the humidity and temperature controlled chamber, tilt table and ultra-fast camera allow super hydrophobic or absorbent surface characterisation. It is then possible for example to measure the stall angle on super hydrophobic surfaces. 

Main equipment (strengths of the Institute) :

The wettability platform is equipped with

  • 1 Krüss DSA100 goniometer,
  • 1 Krüss K12 tensiometer,
  • 1 Krüss K14 tensiometer

Technical description

Goniometer DSA100 - Krüss

Type of measurements :

  • Static and dynamic contact angle (advancing angle and withdrawal) between a liquid and a solid.
  • “Roll-off” stall angle on hydrophobic and superhydrophobic surfaces.
  • Measurement of the surface tension of liquids per hanging drop.
  • Measurement of the liquid interfacial tension – liquid per hanging drop.
  • Temperature measurement and control from 30°C to 400°C.
  • Measurement and control of moisture content.
  • Calculation of the surface energy of the solid.

The goniometer has a camera that can record 200 fps (1200 x 800 pixels), 500 fps (560 x 350 pixels), 800 fps (320 x 200 pixels), 2000 fps (90 x 60 pixels).

Accessories :

  • Temperature (30°C to 70°C) and humidity measuring and control unit.
  • Temperature measuring and control unit (30°C to 400°C)
  • Hooked needles for measuring interfacial tension in two liquid phases.
  • Quartz tank.
  • Tilt table.

The plate can be moved in x, y and z.

Self-service accessibility for permanent and PhD students with a large number of samples and after training by the technical manager

Contact : Philippe KUNEMANN 03.89.60.87.51 philippe.kunemann@uha.fr

Tensiometer K12 - Krüss
K12 tensiometer – Krüss

Type of measurements :

  • Static and dynamic contact angle (advancing angle and withdrawal) between a liquid and a solid (flat) whose wetting perimeter is known.
  • Measurement of the surface tension of liquids by Wilhelmy’s method (thin plate or ring).
  • Measurement of the interfacial liquid – by Wilhelmy’s method (thin plate or ring).
  • Measuring range 0.01 to 500 mN/m.
  • Speed ​​from 1 to 12 mm/min
  • Measurement and control of the temperature from 30°C to 70°C using a thermostatic bath.
  • Measurement of the density of a liquid.
  • Calculation of the surface energy of the solid.
  • Calculation of the critical micellar concentration.
  • Contact angles on powders : Absorption measurements by the Washburn method.
  • Max reach 110g.

Accessories :

  • Thermostatic bath with water circulation (30°C to 70°C).
  • Thin plate.
  • Ring.
  • Brass cylinder of known density.

Self-service accessibility for permanent and PhD students with a large number of samples and after training by the technical manager

Contact :  Philippe KUNEMANN – 03.89.60.87.51- philippe.kunemann@uha.fr

Tensiometer K14 - Krüss
K14 tensiometer – Krüss

Type of measurements :

  • Static and dynamic contact angle (advancing angle and withdrawal) between a liquid and a solid (rectangular fibre or plate) whose wetting perimeter is known.
  • Measurement of the surface tension of liquids by Wilhelmy’s method (thin plate or ring).
  • Measurement of the interfacial liquid – by Wilhelmy’s method (thin plate or ring).
  • Measurement and control of the temperature from 30°C to 70°C using a thermostatic bath.
  • Calculation of the surface energy of the solid.
  • Max reach 5g.
  • Minimum diameter of a fibre : 5μm.
  • Measuring range 0.01 to 100 mN/m.
  • Speed ​​from 1 to 12 mm/min

Accessories :

  • Thermostatic bath with water circulation (30°C to 70°C).
  • Thin plate.
  • Ring.

Self-service accessibility for permanent and PhD students with a large number of samples and after training by the technical manager.

Contact :  Philippe KUNEMANN – 03.89.60.87.51- philippe.kunemann@uha.fr

IS2M

Bâtiment CNRS
15, rue Jean Starcky - BP 2488
68057 Mulhouse cedex

Bâtiment IRJBD
3 bis, rue Alfred Werner
68093 Mulhouse cedex

tel: (+33)3 89 60 87 00
fax: (+33)3 89 60 87 99

Réseaux sociaux

 

  

IS2M

Bâtiment CNRS
15, rue Jean Starcky - BP 2488
68057 Mulhouse cedex

Bâtiment IRJBD
3 bis, rue Alfred Werner
68093 Mulhouse cedex

tel: (+33)3 89 60 87 00
fax: (+33)3 89 60 87 99

Réseaux sociaux

 

  

IS2M

Bâtiment CNRS
15, rue Jean Starcky - BP 2488
68057 Mulhouse cedex

Bâtiment IRJBD
3 bis, rue Alfred Werner
68093 Mulhouse cedex

tel: (+33)3 89 60 87 00
fax: (+33)3 89 60 87 99

Réseaux sociaux