Rheological Property of Sodium Alginate-Agar-Montmorillonite Ternary Solution

2014 ◽  
Vol 900 ◽  
pp. 357-360
Author(s):  
Nan Song Ma ◽  
Su Juan Pang ◽  
Nai Xu ◽  
Li Sha Pan ◽  
Guang Mao Li ◽  
...  
Keyword(s):  
Rheological Property ◽  
Rheological Properties ◽  
Sodium Alginate ◽  
Apparent Viscosity ◽  
Rotation Speed ◽  
Solution Temperature ◽  
Ternary Solution ◽  
Micro Structure ◽  
Rotational Viscometer

The rheological properties of sodium alginate (SA)/agar (AR)/montmorillonite (MMT) solutions were investigated using a rotational viscometer. The dependence of solution apparent viscosity on rotation speed, MMT proportion and solution temperature were researched systematically. Furthermore, the relation of apparent viscosity and micro-structure of the ternary solution was also discussed.

Rheological Properties of Blend Spinning Solution of Sodium Alginate and TiO2 Nanoparticles

2012 ◽  
Vol 430-432 ◽  
pp. 301-305
Author(s):  
Li Wen Tan ◽  
Dong Mei Xu ◽  
Quan Ji ◽  
Bing Bing Wang ◽  
Yan Zhi Xia
Keyword(s):  
Rheological Properties ◽  
Sodium Alginate ◽  
Apparent Viscosity ◽  
Flow Behavior ◽  
Viscosity Index ◽  
Rheological Parameters ◽  
Nano Tio2 ◽  
Flow Behavior Index ◽  
Flow Activation Energy ◽  
Degradation Degree

Rheological properties of blend spinning solution of sodium alginate and TiO2 nanoparticles (SA/nano-TiO2) were investigated. The rheological parameters, structural viscosity index (Δη) and flow activation energy (Eη) of spinning solutions were calculated. The results reported that the blend spinning solutions were non-newtonian fluids. The apparent viscosity, consistency index (k) and Eη increased with increasing nano-TiO2 content in SA spinning solution, but the degradation degree of apparent viscosity decreased, flow behavior index (n) only slightly decreased and the Δη had no significantly change. The apparent viscosity (ηa) of spinning solutions could be regulated by changing temperature under 50oC. Blend spinning solution had good stability and practical applicability.

Rheological Properties of Aircraft Grease Containing Nano-Additives

2009 ◽  
Vol 419-420 ◽  
pp. 53-56
Author(s):  
Bao Yu Song ◽  
Qing Xiang Yang ◽  
Feng Zhang ◽  
Dai Zhong Su
Keyword(s):  
Rheological Properties ◽  
Apparent Viscosity ◽  
Shear Thinning ◽  
Nano Particles ◽  
Rheological Parameters ◽  
Nanoparticle Concentration ◽  
Rotational Viscometer ◽  
Shear Rates ◽  
The One ◽  
The Given

The apparent viscosity of aircraft grease with different nano-particles content, temperature and shear rates were studied using a rotational viscometer. The rheological properties of two types of aircraft grease, the basic grease and the one with nano-particles additives, were investigated using a rheometer. The results indicated that the apparent viscosity increases with the increase of nanoparticle concentration with the given ratio of nano-particles added. It was also found that the grease with and without the nano-particles both have yield stresses and clear shear-thinning properties. The shear-thinning phenomenon of the grease containing nano-particles is more evident than that of the basic grease. The experimental results also reveal that the rheological characteristics of both types of grease fall in Herschel-Bulkley class, and the nano-particles have a significant influence on the rheological parameters. At the end, the rheology mechanism was discussed based on the entanglement and orientation theories.

Performance Study of Coal Water Slurry

2014 ◽  
Vol 716-717 ◽  
pp. 16-19
Author(s):  
Ke Gai ◽  
Hui Li Qi ◽  
Dong Ping Ma ◽  
Wen Li Liang
Keyword(s):  
Rheological Property ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Performance Study ◽  
Water Slurry ◽  
Coal Water Slurry ◽  
The Stability ◽  
Increasing Temperature

This paper is based on the research of the coal water slurry rheological property and stability. The influence of the concentration, additives and temperature on the rheological properties of the slurry has also been studied. The apparent viscosity increases with increasing concentration of coal water slurry, and decreases with increasing temperature. An introduction of additives can greatly improve the rheological properties of coal water slurry. The stability of coal water slurry increases with the increase of concentration, and the stability decreases with the increase of temperature. A proper amount of additives can improve its stability.

Characterization of Cellulose Nanocrystal Suspension Rheological Properties Using a Rotational Viscometer

2021 ◽  
Vol 71 (3) ◽  
pp. 290-297
Author(s):  
Yucheng Peng ◽  
Changlei Xia ◽  
Brian Via
Keyword(s):  
Shear Rate ◽  
Rheological Properties ◽  
Power Law ◽  
Apparent Viscosity ◽  
Flow Behavior ◽  
Cellulose Nanocrystal ◽  
Rotational Viscometer ◽  
Spindle Rotation ◽  
Quality Control Tool ◽  
Calculation Results

Abstract Interest in cellulose nanocrystal (CNC) recently has been growing significantly. Many applications have been developed for CNC and appropriate procedures to handle the CNC suspensions are critical for these applications. In this study, we explored a method evaluating CNC suspensions based on rheological property characterization. We used a rotational viscometer to characterize CNC suspensions at concentrations of 3, 4, 5, and 6 wt.%. We collected primary readings from the rotational viscometer, including spindle rotation speed and torque, to generate apparent viscosity and shear rate for CNC suspensions. We applied three different methods summarized from the literature to calculate apparent viscosity and real shear rate. We critically analyzed differences among calculation results from the three methods. Shearing thinning behaviors obeyed the power law flow model for all CNC suspensions in the shear rate tested. At different concentrations, consistency and flow behavior indices in the model differed in the measured shear rate range. With the same shear rate, higher concentration CNC suspension had a higher apparent viscosity. The apparent viscosity of the CNC suspension was associated with its weight concentration in a power law relationship. This study indicated that a rotational viscometer can be used as a quality control tool for characterizing the rheological properties of the CNC suspensions. We made recommendations for using appropriate calculation methods to obtain shear rate and apparent viscosity of CNC suspensions from the primary readings of a rotational viscometer under different situations.

Rheological Properties of Limited Enzymatic Hydrolyzed Wheat Gluten

2012 ◽  
Vol 550-553 ◽  
pp. 1535-1539
Author(s):  
Zhang Cun Wang ◽  
Le Jing Li ◽  
Xue Wei Zhao ◽  
Sheng Wen Cui
Keyword(s):  
Rheological Properties ◽  
Sodium Alginate ◽  
Apparent Viscosity ◽  
Xanthan Gum ◽  
Wheat Gluten ◽  
Shear Thinning ◽  
Effects Of Temperature ◽  
Complex Solutions

The rheological properties of Limited Enzyme-hydrolyzed Wheat Gluten (LHWG) and its complex solutions with xanthan gum (XG), sodium alginate (SA) or gelatin were researched by Brookfield DV-Ⅱ+Pro Viscometer. The results showed that they all exhibited typical shear-thinning behavior and the higher LHWG concentration, the more evident of the shear thinning was. The effects of temperature on the rheology of LHWG were very complicated based on the concentration. The apparent viscosity of 300 mg/mL LHWG (20°C) was higher than that of 100 mg/mL and 200 mg/mL, and showed fluctuation between 20°C and 90°C, which were strongly different from that of low LHWG solution. However, the rheological properties of LHWG were influenced slightly by shearing time.

scholarly journals Comparison between the Effect of Local Katira Gum and Xanthan Gum on the Rheological Properties of Water-based Drilling Fluids

2020 ◽  
Vol 4 (2) ◽  
pp. 18
Author(s):  
Bayan Qadir Sofy Hussein ◽  
Khalid Mahmood Ismael Sharbazheri ◽  
Nabil Adiel Tayeb Ubaid
Keyword(s):  
Rheological Property ◽  
Rheological Properties ◽  
Yield Point ◽  
Experimental Work ◽  
Apparent Viscosity ◽  
Xanthan Gum ◽  
Drilling Fluid ◽  
Drilling Fluids ◽  
Drilling Mud ◽  
Water Based

The rheological properties of drilling fluids have an important role in providing a stable wellbore and eliminating the borehole problems. Several materials including polymers (xanthan gum) can be used to improve these properties. In this study, the effect of the local Katira, as a new polymer, on the rheological properties of the drilling fluids prepared as the bentonite-water-based mud has been investigated in comparison with the conventional xanthan gum. Experimental work was done to study of rheological properties of several gums such as, local katira gum, and xanthan gum bentonite drilling mud. Different samples of drilling fluids are prepared adding the xanthan gum and local katira to the base drilling fluid at different concentrations using Hamilton Beach mixer. The prepared samples are passed through rheological property tests including the apparent viscosity, plastic viscosity, and yield point (YP) under different temperature conditions. The obtained results show that the viscosity is increased from 5 to 8.5 cp and YP is increased from 18.5 to 30.5 lb/100 ft2, with increasing the concentration of the xanthan gum from 0.1 to 0.4. However, the effect of the local katira in increasing the viscosity and YP is lower compared with the xanthan gum, which are ranged between 5–6 cp and 18.5–20.5 cp.

scholarly journals THE INFLUENCE OF CALCIUM NITRATE ON THE PLASTICIZING EFFECT OF CEMENT PASTE

2016 ◽  
Vol 22 (3) ◽  
pp. 434-441 ◽  
Author(s):  
Gintautas SKRIPKIŪNAS ◽  
Asta KIČAITĖ ◽  
Mindaugas MACIJAUSKAS
Keyword(s):  
Rheological Properties ◽  
Cement Paste ◽  
Rheological Model ◽  
Rotation Speed ◽  
Calcium Nitrate ◽  
Flow Curves ◽  
Rotational Viscometer ◽  
Cement Pastes ◽  
Steady Rotation

The rheological properties of the cement pastes have been determined using a rotational viscometer under a special testing routine by increasing and retaining a steady rotation speed of the viscometer cylinder up to certain values and for a certain time. These tests, using rotational viscometer, have been conducted by making the assessment of ce­ment paste flow curves, using Bingham rheological model. Rheological properties of cement pastes were tested at dif­ferent times after pastes mixing: 0 min, 30 min, 60 min, 90 min, 120 min and 180 min. Cement pastes with same W/C ratio equal to 0.35 were tested. The content of admixture was used 0%, 0.5%, 1%, 2%, 3% and 5%. The admixture of Ca(NO3)2 can be used in cement pastes and concretes without a reduction in consistency during 120 min in the dosage of up to 2%. Dosages of Ca(NO3)2 from 3% are not recommended for cement pastes and concrete, they significantly increase the viscosity of mixtures immediately after mixing The admixture of calcium nitrate changes thixotropy of ce­ment pastes. In this case, a bigger dosage of calcium nitrate increases the thixotropy of pastes.

Rheological Properties of Tomato Concentrate

2008 ◽  
Vol 4 (7) ◽  
Author(s):  
Manish Dak ◽  
Radha Charan Verma ◽  
S N A Jaaffrey
Keyword(s):  
Rheological Properties ◽  
Absolute Temperature ◽  
Power Law Model ◽  
Arrhenius Model ◽  
Rotational Viscometer ◽  
Consistency Coefficient ◽  
Flow Behaviour Index ◽  
Different Temperatures ◽  
Wide Gap ◽  
Good Agreement

Rheological properties of tomato concentrate were evaluated using a wide-gap rotational viscometer (Brookfield Engineering Laboratories: Model LVDV-II) at different temperatures of 20, 30, 40, 50, and 60oC, at concentration of 18, 12.18 and 8.04 % total solids, and at appropriate shear rate(1-100 RPM). The power law model was fitted to the experimental results. The values of flow behaviour index (n) were found less than unity (0.23 to 0.82) at all the temperature and the concentration indicating shear-thinning (pseudoplasticity) behaviour of the concentrate. The correlation between the observed consistency coefficient ranging from 0.09 to 65.87 Pa.sn and the inverse absolute temperature has been exhibited by Arrhenius model. Consistency coefficient increased exponentially with increase in the concentration. Statistical model was used for prediction of the consistency coefficient as a function of temperature and concentration which showed a good agreement (r2=0.99) between experimental and theoretical values. The magnitude of activation energy were found to be in the range of 8.6 to 14.08 kJ/mol.K.

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