Anubhav Tripathi

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The liquid filament microrheometer originally described by Bazilevsky et al. (1990) provides a simple way of extracting material parameters for Newtonian and viscoelastic fluids from measurements of the capillary breakup of a thin fluid thread. However, there is an unresolved discrepancy in the value of the Newtonian viscosity obtained from the experimental(More)
SAR is a powerful tool for producing high resolution remote sensing images under all weather conditions. But, during the backscattering process, the obtained images are contaminated with a special type of noise, called speckle. Speckle noise appears like a granular pattern in the SAR images and results in degrading the image quality. This work uses(More)
We investigate the steady and transient shear and extensional rheological properties of a series of model hydrophobically modified ethoxylate-urethane (HEUR) polymers with varying degrees of hydrophobicity. A new nonlinear two-species network model for these telechelic polymers is described which incorporates appropriate molecular mechanisms for the(More)
Polymeric particles are used in a variety of applications such as systems for controlled chemical release, [1–9] optical materials , [10, 11] chromatographic media, [12] and various biological applications. [13–16] The physical and chemical properties of polymeric particles, such as their shape, size, porosity, surface charge, and hydrophilicity or(More)
We elucidate mechanisms for colloidal gelation of attractive nanoemulsions depending on the volume fraction (ϕ) of the colloid. Combining detailed neutron scattering, cryo-transmission electron microscopy and rheological measurements, we demonstrate that gelation proceeds by either of two distinct pathways. For ϕ sufficiently lower than 0.23, gels exhibit(More)
We investigate the steady and transient shear and extensional rheological properties of a series of model hydrophobically modified ethoxylate-urethane (HEUR) polymers with varying degrees of hydrophobicity. A new nonlinear two-species network model for these telechelic polymers is described which incorporates appropriate molecular mechanisms for the(More)
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