scholarly journals Effects of volume fraction and particle shape on the rheological properties of oblate spheroid suspensions

2021 ◽  
Vol 33 (8) ◽  
pp. 081703
Author(s):  
Junwei Guo ◽  
Qi Zhou ◽  
Ron Chik-Kwong Wong
Keyword(s):  
Rheological Properties ◽  
Particle Shape ◽  
Volume Fraction ◽  
Oblate Spheroid

scholarly journals Effect of particle size distribution on rheological properties of chocolate

2020 ◽  
Vol 11 (11) ◽  
pp. 9547-9559
Author(s):  
Annika Feichtinger ◽  
Elke Scholten ◽  
Guido Sala
Keyword(s):  
Surface Roughness ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Rheological Properties ◽  
Size Distribution ◽  
Particle Shape ◽  
Size Ratio ◽  
Particle Size Ratio ◽  
Effect Of Particle Size

Particle size distribution and particle size ratio have an important effect on rheological properties of model chocolate samples, but also other factors like particle shape, surface roughness and hydrophilicity should be taken into account.

scholarly journals The effect of particle shape on the structure and rheological properties of carbon-based particle suspensions

2015 ◽  
Vol 33 (11) ◽  
pp. 1550-1561 ◽  
Author(s):  
Ran Niu ◽  
Jiang Gong ◽  
Dong-hua Xu ◽  
Tao Tang ◽  
Zhao-yan Sun
Keyword(s):  
Rheological Properties ◽  
Particle Shape ◽  
Particle Suspensions ◽  
Carbon Based

scholarly journals Relating foam and interfacial rheological properties of β-lactoglobulin solutions

Soft Matter ◽  
2014 ◽  
Vol 10 (48) ◽  
pp. 9626-9636 ◽  
Author(s):  
M. Lexis ◽  
N. Willenbacher
Keyword(s):  
Rheological Properties ◽  
Yield Stress ◽  
Volume Fraction ◽  
Laplace Pressure ◽  
Model Predictions ◽  
Order Of Magnitude ◽  
Gas Volume Fraction ◽  
Gas Volume ◽  
Β Lactoglobulin

Interfacial elasticity can strongly increase the modulus and yield stress of protein foams by more than an order of magnitude compared to widely accepted model predictions only including contributions from Laplace pressure and gas volume fraction.

Correlation of Vulcanization and Viscoelastic Properties of Nanocomposites Based on Natural Rubber and Different Nanofillers, with Molecular and Supramolecular Structure

2010 ◽  
Vol 83 (1) ◽  
pp. 16-34 ◽  
Author(s):  
Mithun Bhattacharya ◽  
Anil K. Bhowmick
Keyword(s):  
Natural Rubber ◽  
Rheological Properties ◽  
Supramolecular Structure ◽  
Carbon Nanofiber ◽  
Volume Fraction ◽  
Barrier Properties ◽  
Qualitative Description ◽  
Viscoelastic Parameters ◽  
Low Volume ◽  
And Performance

Abstract Elastomer nanocomposites reinforced with low volume fraction of nanofillers, such as nanoclays and carbon nanofibers, have long been known to possess significantly improved mechanical, thermal, dynamic mechanical, flame retardant, and barrier properties. The present work attempts to evaluate the effect of nanofillers (like modified and unmodified montmorillonite, sepiolite, carbon nanofiber, and carbon black) and their amount on vulcanization, as well as dynamic and rheological properties in the prevulcanization and postvulcanization stages. Upon using organomodified nanoclay, optimum cure time was reduced and cure rate index increased; whereas, in comparison, carbon nanofiber resulted in a slower cure. The influence of loading of some representative nanofillers on natural rubber was studied through qualitative description of critical dynamic viscoelastic parameters, which indicated the formation of supramolecular structure even at low volume fraction. The nanocomposite vulcanizates showed solidlike rheological behavior and upon implementation of dispersion techniques the activation energy of flow was reduced by around 60%. The knowledge of cure and rheological properties of the compounds, which evolves from the structure formation, can be utilized for assessing process optimization, cost reduction, and performance of the nanocomposites.

scholarly journals Analysis and Testing of Chain Characteristics and Rheological Properties for Magnetorheological Fluid

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Song Chen ◽  
Jin Huang ◽  
Hongyu Shu ◽  
Tiger Sun ◽  
Kailin Jian
Keyword(s):  
Magnetic Field ◽  
Rheological Properties ◽  
Magnetic Particle ◽  
Volume Fraction ◽  
Chain Structure ◽  
Field Size ◽  
Digital Holographic Microscopy ◽  
Mr Fluid ◽  
Shear Yield ◽  
Holographic Microscopy

Digital holographic microscopy is presented in this study, which can measure the magnetorheological (MR) fluid in different volume fractions of particles and different magnetic field strengths. Based on the chain structure of magnetic particle under applied magnetic field, the relationships between shear yield stress, magnetic field, size, and volume fraction of MR fluid in two parallel discs are established. In this experiment, we choose three MR fluid samples to check the rheological properties of MR fluid and to obtain the material parameters with the test equipment of MR fluid; the conclusion is effective.

scholarly journals Influence of polymer fibers on rheological properties of cement mortars

2017 ◽  
Vol 7 (1) ◽  
pp. 228-236 ◽  
Author(s):  
Dorota Malaszkiewicz
Keyword(s):  
Rheological Properties ◽  
Volume Fraction ◽  
Fiber Type ◽  
Cementitious Materials ◽  
Plastic Viscosity ◽  
Synthetic Fiber ◽  
Rheological Parameters ◽  
Model Parameters ◽  
Fine Aggregate ◽  
Bingham Model

AbstractThe reinforcing effect of fibers in cement composites often results in the improvement of the brittle nature of cementitious materials. But the decrease in the workability of fresh concrete is often the disadvantage of fibers addition. Conventional single-point workability tests cannot characterize workability of concrete in terms of fundamental rheological parameters. To this end, this paper describes an investigation of the influence of synthetic fiber additions (fiber length in the range 12–50 mm and volume fraction in the range 0–4%) on the rheological properties of fiber reinforced fresh mortar (FRFM) and development of these properties over time. The rheometer Viskomat XL was used in this study. Within the limitations of the instrument and testing procedure it is shown that FRFMs conform to the Bingham model. Natural postglacial sand 0/4 mm was used as a fine aggregate and cement CEMI 42.5 R was used as a binder. Three commercial synthetic fibers were selected for these examinations. Rheological properties were expressed in terms of Bingham model parameters g (yield value ) and h (plastic viscosity). Based on the test results it was found out that the fiber type and volume fraction affected both the yield stress and plastic viscosity.

Rheological Properties of Copper-Graphite MIM Feedstocks Prepared with Waste PET Binder

2014 ◽  
Vol 660 ◽  
pp. 209-213 ◽  
Author(s):  
Mohammad Fadhil Mat Nor ◽  
Safian Sharif ◽  
Khairur Rijal Jamaludin
Keyword(s):  
Shear Rate ◽  
Injection Molding ◽  
Rheological Properties ◽  
Volume Fraction ◽  
Solid Volume Fraction ◽  
Metal Injection Molding ◽  
Injection Molding Process ◽  
Binder System ◽  
Molding Process ◽  
Capillary Rheometry

In this study, waste polyethylene terephthalate (PET) polymer binder systems were used to prepare copper-graphite metal injection molding (MIM) feedstock. A mixer and screw extrusion were used to achieve optimized feedstock, and the rheological properties of the resulting fluids were evaluated using a capillary rheometry to simulate the injection molding process. The solid loadings in the copper-graphite mixes were investigated in the ranges of 51-53% using PET binder system. The effects of shear rate (γ), solid volume fraction (φ) and temperature (T) on the rheological behavior of the copper/graphite MIM feedstocks are discussed.High viscosity trend was notably recorded as shear rate increased relatively. The results indicated that this feedstock system shows dilatant characteristic and lots of further work shall be conducted in attempt to establish this as an ideal binder system.

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