ISR 400

For Rheometric measurement of interfacial shear viscosity, elastic and viscous modulus, compliance and relaxation time

For studying insoluble monolayers or regular soluble samples on air/water or oil/water interface

Compatible with all KSV's LB Troughs

Additional info

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Available Accessories

Interfacial Shear Rheometer ISR 400

Quantitative measurement of shear stress at fluid interfaces has long eluded researchers employing standard rotational rheometers, particularly at very low viscosity or elasticity. With the introduction of the Interfacial Shear Rheometer (ISR 400), KSV removes the guesswork. A teflon-coated magnetic needle is floated in a half-cylinder at the gas/liquid or liquid/liquid interface, and moved with an applied magnetic field. The movement of the needle is observed microscopically, and the difference between applied force and measured position provides phase shift, viscosity, elastic and loss moduli, creep and relaxation times. Since the KSV Interfacial Shear Rheometer (KSV ISR 400) can be integrated with a standard KSV Langmuir trough, these measurements can be applied to both soluble and insoluble films.

Applications

Prediction of emulsion, froth and foam stability
Determination of thin film structure
Examination of phase transitions
Monitoring surface gelation and network formation in real time
Continuous monitoring of protein adsorption and denaturization
Detection of entanglements and hydrogen bonding in thin films

Software

LabView-based software allows the user to control the applied stress or strain. Real-time measurements of the surface rheological properties are presented.

Possible Measuring Configurations

The instrument can be mounted onto standard KSV troughs for insoluble monolayers, or it can be used with normal sample dishes for soluble systems. Measurements can be performed at air/water and oil/water interfaces.

Specifications
Dynamic moduli lower limit		0.001 mN/m
Frequency range		0.01 to 10 rad/s
Strain range		0.0003 to 1

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