Soft Materials and Rheology Group Laboratory
We conduct predominantly experimental research on complex fluids and on buckling phenomena. This page describes some of the principal tools we use on a daily basis.
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This is the workhorse rheometer in our lab, a stress-controlled device equipped with a Peltier plate for measurements close to room temperature, a convection/radiation chamber for temperatures from -150C to +300C, several parallel plate and cone-and-plate geometries, and a Couette cell.
This is a strain-controlled rheometer equipped with a Peltier plate and several measuring geometries. We also have a custom-built flow-visualization cell that mounts on the ARES rheometer for visualization of shear flow along the shear-gradient direction.
This is a custom-built spinning drop tensiometer for measuring the interfacial tension between two immiscible fluids (or surface tension of a fluid). It has a 12 mm diameter tube which can spin up to 10000 rpm. An oven can maintain a temperature of upto 120C. Strobe-illuminated images are collected with a CCD camera.
Our workhorse microscope is an Olympus CKX41 inverted fluorescence microscope with several objectives ranging from 4x to 40x, and an area-scan black-and-white camera. We also use awesome microscopes at the Center for Biologic Imaging.
We have an Instron 4200 tensile testing machine with a 1000 kg load cell and either tensile or 3-point bending grips. We also have a Texture Analyzer which can do both tensile as well as compression testing, but at small loads (5 kg maximum).
· Leitz upright transmission microscope
· Meiji stereomicroscope with trinocular head
· Plasma cleaner
· Platen press (up to 300C)
· Canon digital Rebel SLR camera
· 30kV high-voltage power supply (part of an electrospinning setup)
· Tissuemiser high-shear mixer
· Syringe pumps
· Vacuum oven and pump
· We regularly use the SEM in the School of Engineering. Our colleagues also kindly let us use contact angle measurement apparatus, spin coater, and pendant drop apparatus.
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