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PD100 flyer KSV PD 100 www ksvltd com • Stability of emulsions and foams • Adsorption and competition of surfactants, proteins or polymers at interfaces • Rheological characteristics of interfaces • C[.]
KSV PD 100 Interfacial Elasticity – Pulsating Drop Module • Stability of emulsions and foams • Adsorption and competition of surfactants, proteins or polymers at interfaces • Rheological characteristics of interfaces • Controlled compression or dilation of an area of an interface (sinusoidal, ramp, step, saw tooth) • Wide frequency range of perturbation • Small liquid volume KSV PD 100 is an optional module for the KSV’s CAM 200 Surface tension/Contact angle meter The module enables determination of rheological characteristics of interfacial layers The viscoelasticity of an interface is measured by inducing a small controlled perturbation to a pendant drop (or bubble) volume and simultaneously recording the response of the interfacial tension and the drop area If the interfacial deformation is sinusoidal the interfacial elasticity and viscosity can easily be determined from the phase shift of the interfacial tension and area response www.ksvltd.com KSV PD 100 Example Measurements Area and surface tension response to a sinusoidal volume perturbation Elasticity as a function of frequency for PEO polymer Specifications Perturbation principle: Perturbation form: Frequency range: Frequency resolution: Maximum volume amplitude: Volume amplitude resolution: Sample liquid volume needed: Sensor head dimension: Operational voltage: Computer requirements: www.ksvltd.com Piezo-electric membrane enclosed in a chamber Sinusoidal, saw tooth, square or ramp 0-100 Hz (practically useful range 0.01 – 10 Hz) 0.001 Hz µl 0.01µl 0.6 ml 150 x 120 x 20 mm3 12 V DC adapter (90-264 V , 50/60 Hz) PC running Windows™ 2000 or XP, sound card KSV Instruments Ltd Höyläämötie 00380 Helsinki FINLAND Tel +358-9-5497-3300 Fax +358-9-5497-3333 e-mail: info@ksvltd.fi