Large amplitude oscillatory shear rheology of three different shear-thickening particle dispersions

2015 ◽  
Vol 54 (7) ◽  
pp. 601-618 ◽  
Author(s):  
Sunilkumar Khandavalli ◽  
Jonathan P. Rothstein
Keyword(s):  
Large Amplitude ◽  
Shear Thickening ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Shear Rheology

Rheological properties of soy protein isolate – carboxymethyl flaxseed gum mixed dispersions under large amplitude oscillatory shear

2020 ◽  
Vol 16 (7) ◽  
Author(s):  
Yu-xi Ma ◽  
Jin-lei Niu ◽  
Dong Li ◽  
Li-jun Wang
Keyword(s):  
Rheological Properties ◽  
Soy Protein ◽  
Large Amplitude ◽  
Soy Protein Isolate ◽  
Shear Thickening ◽  
Shear Thinning ◽  
Protein Isolate ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Flaxseed Gum

AbstractCarboxymethyl flaxseed gum (CMFG) is developed in our laboratory by modifying flaxseed gun through carboxymethylation. The aim of this study is to reveal the rheological properties of soy protein isolate – carboxymethyl flaxseed gum (SPI-CMFG) mixed dispersion in realistic processing conditions by conducting large amplitude oscillatory shear (LAOS) test, with consideration of concentration and degree of substitution (DS) of CMFG. Results showed that increasing CMFG concentration significantly increased storage moduli (Gʹ), loss moduli (Gʺ), and the apparent viscosity of all SPI-CMFG mixed dispersions. LAOS test illustrated that the dispersions experienced a transition from LAOS type IV to type III after increasing the concentration of CMFG, while the behavior converted from LAOS type I to type III by increasing DS. Fourier transform rheology (FTR) exhibited that increasing the concentration or DS of CMFG both induced a conversion from “soft sphere” to “hard sphere” behavior. The strain-stiffening ratio S and the shear-thickening ratio T demonstrated, that all SPI-CMFG dispersions experienced a similar conversion from strain stiffening to strain softening, and from shear thinning to shear thickening behaviors by increasing the concentration of CMFG. Nevertheless, the mixed dispersions presented shear thickening behaviors when DS was no more than 0.520 in the whole range of strain, while a conversion from shear thinning to shear thickening behavior occurred, when DS reached at 0.755 and 0.973.

Shear Thickening of an Amphiphilic Polymer Solution as Studied by Large Amplitude Oscillatory Shear Flow

2008 ◽  
Author(s):  
Ji Wang ◽  
Christophe Chassenieux ◽  
Jean-François Tassin ◽  
Albert Co ◽  
Gary L. Leal ◽  
...  
Keyword(s):  
Shear Flow ◽  
Polymer Solution ◽  
Large Amplitude ◽  
Shear Thickening ◽  
Amphiphilic Polymer ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Oscillatory Shear Flow

scholarly journals Field–Frequency-Dependent Non-linear Rheological Behavior of Magnetorheological Grease Under Large Amplitude Oscillatory Shear

2021 ◽  
Vol 8 ◽  
Author(s):  
Huixing Wang ◽  
Tianxiao Chang ◽  
Yancheng Li ◽  
Shaoqi Li ◽  
Guang Zhang ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Large Amplitude ◽  
Three Dimensional ◽  
Viscoelastic Behavior ◽  
Shear Thickening ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Field Frequency ◽  
Frequency Dependent ◽  
Non Linear

This article investigates the influence of frequency on the field-dependent non-linear rheology of magnetorheological (MR) grease under large amplitude oscillatory shear (LAOS). First, the LAOS tests with different driving frequencies were conducted on MR grease at four magnetic fields, and the storage and loss moduli under the frequency of 0.1, 0.5, 1, and 5 Hz were compared to obtain an overall understanding of the frequency-dependent viscoelastic behavior of MR grease. Based on this, the three-dimensional (3D) Lissajous curves and decomposed stress curves under two typical frequencies were depicted to provide the non-linear elastic and viscous behavior. Finally, the elastic and viscous measures containing higher harmonics from Fourier transform (FT)-Chebyshev analysis were used to quantitatively interpret the influence of the frequency on the non-linear rheology of MR grease, namely, strain stiffening (softening) and shear thickening (thinning), under LAOS with different magnetic fields. It was found that, under the application of the magnetic field, the onset of the non-linear behavior of MR grease was frequency-dependent. However, when the shear strain amplitude increased in the post-yield region, the non-linear rheology of MRG-70 was not affected by the oscillatory frequency.

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