Honey Adulterated with Glucose Syrup: Rheological Modeling

Abstract Honey's reputation for its various both nutritional and medicinal benefits and pleasant taste ensures a sustained high demand for the product all over the world. However, honey supply is quite limited and seldom meets the demand, and consequently the product commands a relatively high price and is exposed to adulteration and imitation. Honey was adulterated with glucose syrup weight of 10%, 50%, 70% and 90%, and each sample was analysed. Pure honey at ambient temperatures exhibits peculiar non-Newtonian rheological behaviour. Adulteration with glucose syrup (a Newtonian fluid) drags its viscosity towards Newtonian flow behaviour. Malcolm Cross and Ostwald-de Waele Power-Law models were used to fit the rheological data, and the former fitted better than the latter. The behaviour indices in both models increased with increasing adulteration of honey with glucose syrup. Chromatographic characterizations of honey which provides an acceptable measure of honey quality corroborated the conclusions derived from the rheological characterization of this study.

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Physicochemical and Electro-Rheological Characterization of Kaolinite / CMS / Silicone Oil Fluid

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.446.33 ◽

2010 ◽

Vol 446 ◽

pp. 33-41

Author(s):

Thomas Reiss ◽

Saoussen Laribi ◽

Jean-Marie Fleureau ◽

Jean Francois Tassin

Keyword(s):

Electric Field ◽

Yield Stress ◽

Applied Electric Field ◽

Silicone Oil ◽

Rheological Behaviour ◽

Rheological Characterization ◽

Clay Particles ◽

Observed Behaviour ◽

Composite Nature

The aim of this study is to elaborate electro-rheological fluids based on kaolinite. the scientific characterization made it possible the identification of the composite nature and the checking of the intercalation of the polymer among the clay particles The rheological behaviour of the fluid depends on the electric field. A yield stress of the suspensions is observed, which increases with the applied electric field. An interpretation based on the different modes of association between the clay particles is proposed to account qualitatively for the observed behaviour.

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Materials for Anticorrosive Protection of Cellular Bodies of Rotatory Air Preheaters from Energentic Installations. Modification and Rheological Characterization of Some Epoxy Resins

Revista de Chimie ◽

10.37358/rc.08.4.1807 ◽

2008 ◽

Vol 59 (4) ◽

Author(s):

Adriana Bantas ◽

Lelian Cioroianu ◽

Gabriela Cioroianu ◽

Minodora Leca ◽

Alexandra Pica ◽

...

Keyword(s):

Fatty Acids ◽

Epoxy Resins ◽

Rheological Behaviour ◽

Specific Weight ◽

Heat Conducting ◽

Metal Powders ◽

Rheological Characterization ◽

Film Forming ◽

Fluid Behaviour

Celualar bodies from the cold region of the heat exchange surface of rotatory air preheaters from energetic installations are strongly affected by sulphuric corrosion and, can be protected using heat conducting and thermally resistant coatings. Epoxy resins, mofied firstly with tall and soy fatty acids to increase their elasticity and then reacted with acrylic acid and styrene to increase chemical, heat and corrosion resistance, adherence and elasticity, correspond to the qualities required for the film-forming material. The thermal conductivity of coating can be increased by introducing finely dispersed metal powders. Rheological measurement emphasizes that the resins esterified with both kinds of fatty acids have relatively low viscosities, ranging between 3500 and 8600 mPa.s, and ideal plastic fluid behaviour; the higher the epoxy equivalent of the resin the lower the viscosity of the esters. Treatment of resins (previoisly esterifies with tall fatty acids) with the two monomers increases the viscosity and modifies the rheological behaviour, transforming it into a pseudoplastic one. The increase of viscosity is huge for the resin having lower epoxy equivalent and its behaviour becomes thixotropic. Given the high specific weight of metal powders , it is expected that this last modified resin gives the most stable film-forming disperse systems with metal powders.

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Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests

Fluids ◽

10.3390/fluids6110419 ◽

2021 ◽

Vol 6 (11) ◽

pp. 419

Author(s):

Armando Carravetta ◽

Oreste Fecarotta ◽

Riccardo Martino ◽

Maria Cristina Morani

Keyword(s):

Experimental Tests ◽

Rheological Parameters ◽

Rheological Characterization ◽

Plastic Model ◽

The Past ◽

Pressure Pipe ◽

Complete Set ◽

Constitutive Parameters ◽

Better Than

The rheological behavior of non-Newtonian fluids in turbulent conditions is an important topic in several fields of engineering. Nevertheless, this topic was not deeply investigated in the past due to the complexity of the experimental tests for the assessment of the constitutive parameters. Pressure pipe tests on Herschel-Bulkley mixtures were proven to be suitable for exploring turbulent conditions, but discrepancies with the results of tests performed in laminar flow were detected. These contradictions could be attributed to the inconsistencies of the Herschel-Bulkley model (HB) for high shear rate flows, proven by Hallbom and Klein, who suggested a more general “yield plastic” model (HK). Hence, in this study, a procedure for the estimation of the rheological parameters of both HB and HK models in pressure pipe tests is defined and rated on a complete set of experiments. The HK model performed much better than HB model in the turbulent range and slightly better than the HB model in the laminar range, confirming the consistency of the “yield plastic” model. The rheological parameters obtained by the proposed procedure were used to numerically model a dam-break propagation of a non-Newtonian fluid, showing significant differences in terms of process evolution depending on the constitutive model.

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Development of rapid set mortar for additive manufacturing

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1205/1/012010 ◽

2021 ◽

Vol 1205 (1) ◽

pp. 012010

Author(s):

B Nespor ◽

M Bohac ◽

M Nejedlik

Keyword(s):

Additive Manufacturing ◽

Surface Defects ◽

Blended Cement ◽

Rheological Behaviour ◽

Print Quality ◽

Rheological Characterization ◽

Cement Mortars ◽

Slaked Lime ◽

Shape Retention

Abstract The study presents the development results of blended cement mortars for additive manufacturing. The goal was to achieve a balanced rheological behaviour of the fresh mixture through optimal granulometry, suitable grain shape and the choice of micro-admixtures. The article closely describes the granulometric and rheological characterization of the proposed ternary and quaternary blended mortar mixtures with various SCM’s. The print quality and shape stability of the promising mortars and the researched 3DP mixes were evaluated during incremental layering for comparison. The performed experiments confirmed that the mixtures containing blast furnace slag, quartz powder and metakaolin are more plastic and allow faster layering in height. The slaked lime-enriched mixture has excellent plasticity and is able to resist deformation during overlaying, the printed layers are without surface defects. The small addition of polypropylene fibre (0.08 wt.%) improves the plasticity and shape retention ability.

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Characterization of Rh/Si multilayer structure by HREM and HAADF

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100121016 ◽

1992 ◽

Vol 50 (1) ◽

pp. 122-123

Author(s):

Y. Cheng ◽

J. Liu ◽

M.B. Stearns ◽

D.G. Steams

Keyword(s):

Normal Incidence ◽

High Resolution Electron Microscopy ◽

X Rays ◽

Beam Direction ◽

Cross Sectional ◽

Optical Elements ◽

Resolution Electron ◽

Point To Point ◽

Better Than

The Rh/Si multilayer (ML) thin films are promising optical elements for soft x-rays since they have a calculated normal incidence reflectivity of ∼60% at a x-ray wavelength of ∼13 nm. However, a reflectivity of only 28% has been attained to date for ML fabricated by dc magnetron sputtering. In order to determine the cause of this degraded reflectivity the microstructure of this ML was examined on cross-sectional specimens with two high-resolution electron microscopy (HREM and HAADF) techniques.Cross-sectional specimens were made from an as-prepared ML sample and from the same ML annealed at 298 °C for 1 and 100 hours. The specimens were imaged using a JEM-4000EX TEM operating at 400 kV with a point-to-point resolution of better than 0.17 nm. The specimens were viewed along Si [110] projection of the substrate, with the (001) Si surface plane parallel to the beam direction.

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Rheological characterization of tack and viscoelasticity of compositions of crepe coating used in the Yankee dryer

TAPPI Journal ◽

10.32964/tj18.11.641 ◽

2019 ◽

Vol 18 (11) ◽

pp. 641-649

Author(s):

JOSHUA OMAMBALA ◽

CARL MCINTYRE

Keyword(s):

Normal Force ◽

Weight Ratio ◽

Good Combination ◽

Rheological Characterization ◽

Nonlinear Viscoelastic ◽

Coating Composition ◽

Linear And Nonlinear ◽

Work Done ◽

Tissue Production

The vast majority of tissue production uses creping to achieve the required set of properties on the base sheet. The Yankee coating helps to develop the desired crepe that in turn determines properties such as bulk and softness. The adhesion of the sheet to the Yankee surface is a very important characteristic to consider in achieving the desired crepe. The coating mix usually consists of the adhesive, modifier, and release. A good combination of these components is essential to achieving the desired properties of the tissue or towel, which often are determined by trials on the machine that can be time consuming and lead to costly rejects. In this paper, five compositions of an industrial Yankee coating adhesive, modifier, and release were examined rheologically. The weight ratio of the adhesive was kept constant at 30% in all five compositions and the modifier and release ratios were varied. The normal force and work done by the different compositions have been shown at various temperatures simulating that of the Yankee surface, and the oscillatory test was carried out to explain the linear and nonlinear viscoelastic characteristic of the optimal coating composition.

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