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Analytical Test / DataPhysics
 
     
 

The study of the science of Surface Chemistry began more than 400 hundred years ago with scientists and mathematicians like Leonardo da Vinci, Isaac Newton , Laplace and Thomas Young doing pioneering work in explaining the behavior of surface tension, capillary action, wetting and interfacial tensions.

Interfacial processes are an important part of our day to day modern life. Surfactant behavior in a detergent solution, cosmetics industry, paints and varnishes, semiconductor and plastics industries, biotechnology and dental sciences, all depend on the science and understanding of surface tension.

Data Physics, Germany, designs and manufactures state-of-art instruments and systems for the study of this science of surface tensiometry.

 
     
 
 
 
Dynamic Contact Angle Meter and Tensiometer
 
     
  The DCAT 11 is used for the software-controlled measurement of  
 
 

the contact angle of powders and fiber bundles and the adsorption behavior of liquids on wettable materials according to the modified Washburn method

 

the dynamic contact angle and the surface energy of prismatic and cylindrical samples according to the Wilhelmy method

 

the dynamic contact angle and the surface energy of prismatic and cylindrical samples according to the Wilhelmy method

 

the critical micelle formation concentration of surfactants (CMC) according to the Wilhelmy Plate method, Lenard Frame method or the Du Noüy Ring method with automatic ring correction according to Huh & Mason, Zuidema & Waters and Harkins & Jordan

 
     
  as well as for fully automated reproducibility measurements.

The DCAT 11 consists of the basic instrument with the following technical equipment:

 
 
 

High-precision electrodynamically compensated weighing system with automatic calibrating function

 

Software-controlled motorized height positioning of the sample vessel with variable speed

 

Integrated measuring and control electronics with digital thermometer

 

Graphical display for weighing data, temperature and other measuring status

  Serial RS 232C interface with PC connecting cable
  Illuminated sample chamber with connection for inert gas
  Sample vessels of borosilicate glass available with diameters 50,70,100 mm
  Pt100 temperature sensor for the installation in the temperature control unit
  Du Noüy ring RG 11, made of platinum-iridium to DIN 53914
  Wilhelmy plate PT 11, made of platinum-iridium to DIN 53914
 
     
 

It is prepared for the installation of a liquid temperature control unit with integrated magnetic stirrer for mounting either of the sample vessels TV 50 / TV 70 / TV 100.

 
     
 
 
 
OCA 20 Video-Based Contact Angle Meter
 
     
 

Measuring device for the software-controlled measurement and analysis of the static and dynamic contact angle, the surface free energy of solids and their components and the surface and interfacial tension based on the analysis of the drop shape

For the software-controlled measurement and analysis of the static and dynamic contact angle according to the Sessile and Captive Drop method the analysis of the drop shape according to the Pendant Drop method the wetting behavior on solid surfaces the surface free energy of solids and their components the surface and interfacial tension out of the analysis of the drop shape

The OCA 20 consists of the basic instrument with the following technical equipment:

 
 
 

Dosing bay for installation of the optional manual syringe units and single or multiple (max. 4, optional 6) needle support with a vertical and horizontal fine adjustment

  Measuring stage adjustable in X-, Y- and Z- axis for accurate sample positioning
  Lens mount with adjustable tilt
  High-performance six-fold power zoom lens with an integrated continuous fine focus
  High-speed video system with adapter and CCD-camera
  High-performance video digitizing board (frame grabber) for the PC
  Halogen lighting with continuously adjustable intensity without hysteresis for a homogeneous back lighting
  Control and measuring electronics with built-in digital temperature display and serial RS 232C interface
  Power supply with automatic voltage adjustment
 
     
  The 32 bit software SCA 20 developed for Windows NT/9x/2000 offers by various expansion steps:  
 
  Control of the electronic syringe modules, the tilting base assemblies, wafer stages and temperature control units
  Static and dynamic contact angle measurement according to the Sessile and Captive Drop method
 

Calculation of the surface and interfacial tension from the contours of pendant and sessile drops as well as of liquid lamellas on plates, rods and threads

 

Calculation of the surface free energy of solids and their components (e.g. dispersion, polar and hydrogen bond force contribution, acid and base portions respectively) according to the theories of Wu, Zisman, Owens-Wendt, Extended Fowkes, Schultz 1 + 2, Fowkes, van Oss & Good (Acid-Base), Equation of States (EOS)

  Calculation of wetting envelopes from the surface free energy
  Statistics and measurement error analysis
 
     
  Please feel free to Contact Us for more information on the product of your interest.

Website : www.dataphysics.de

 
     
     
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