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Measure Viscosity and Zeta Potential Simultaneously
Viscometry option can be operated as a stand alone unit or in conjunction a combined Zeta -Viscometry Cell (pictured below).

Viscocity cell
Shear Rate 10 to 1000 1/s
Viscosity Ranges  
Stand Alone Version 0.1 to 100mPA*s
Combined Cell Shear Rate 0.02 to 20Pa*s
High Viscosity Cell 1 to 100Pa*s


Typical Data

Figure 1 shows the results of a viscosity measurement while simultaneously measuring the zeta potential of 5 V % TiO2 dispersion in water. The titration begins at about pH = 4 and ends at about pH = 8.5. It is seen that the dispersion viscosity never returns to its initial value even well beyond the i.e.p. of pH=6 of the titania sample.

Ti02
Figure 1


In Figure 2 is shown the pH titration of a 5 W% oil in water emulsion stabilized with β- lactoglobulin at pH=7. The maximum viscosity is reached at the i.e.p. at about pH=5.2 and the viscosity does not return to its initial value even far below the i.e.p. Primary Emulsion
Figure 2

 
 
 
 

 

 
 
  
 
      Colloid Measurements LLC, 2 Oakwood Place, Scarsdale, NY 10583, USA
Tel.: (914) 723-2026, Email: tonis.oja@verizon.net