Effect of gum arabic on freeze-thaw stability, pasting and rheological properties of tapioca starch and its derivatives

2015 ◽  
Vol 51 ◽  
pp. 355-360 ◽  
Author(s):  
Hai-ming Chen ◽  
Xiong Fu ◽  
Zhi-gang Luo
Keyword(s):  
Rheological Properties ◽  
Gum Arabic ◽  
Tapioca Starch ◽  
Freeze Thaw

Low-pressure plasma modification of the rheological properties of tapioca starch

2021 ◽  
pp. 107380
Author(s):  
Kexin Zhang ◽  
Zhihang Zhang ◽  
Ming Zhao ◽  
Vladimir Milosavljević ◽  
P.J. Cullen ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Low Pressure ◽  
Plasma Modification ◽  
Tapioca Starch ◽  
Pressure Plasma ◽  
Low Pressure Plasma

Freezing as a Storage Process for Aqueous Polymer Solutions

2005 ◽  
Vol 15 (2) ◽  
pp. 90-97 ◽  
Author(s):  
M. P. Escudier ◽  
J. Clement-Evans ◽  
R. J. Poole
Keyword(s):  
Rheological Properties ◽  
Xanthan Gum ◽  
Storage Process ◽  
Polymeric Liquids ◽  
Freeze Thaw ◽  
Aqueous Polymer ◽  
Before And After ◽  
Novel Method ◽  
Normal Stress Differences ◽  
Initial Preparation

Abstract There is often a need to perform rheological tests on dilute polymeric liquids at a time long after their initial preparation, for example if a more sensitive or novel method of measuring a material property (such as uniaxial/biaxial extensional viscosity or second normal-stress differences) becomes available. An inexpensive method of storing such fluids which prevents any form of deterioration (e.g. bacteriological) would therefore be of great value. This study explores the potential of freezing as that storage process by investigating whether the freeze-thaw process itself leads to rheological changes. The rheological properties of three polymeric liquids: 0.25 % xanthan gum, 0.125% polyacrylamide and a 0.1 %/0.1 % carboxymethylcellulose / xanthan gum blend commonly used in non-Newtonian fluid flow studies were determined in both shear and oscillation before and after a freeze-thaw process. Within the uncertainty of the rheometer used, the rheological properties of the polymers studied were found to be unaffected by the freeze-thaw process leading to the conclusion that this storage method is indeed a practical possibility.

scholarly journals Compressive Strength, Chloride Permeability, and Freeze-Thaw Resistance of MWNT Concretes under Different Chemical Treatments

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Xingang Wang ◽  
Inkyu Rhee ◽  
Yao Wang ◽  
Yunping Xi
Keyword(s):  
Compressive Strength ◽  
Sodium Dodecyl ◽  
Gum Arabic ◽  
Sodium Polyacrylate ◽  
Chloride Permeability ◽  
Multiwalled Carbon ◽  
Freeze Thaw ◽  
Chemical Treatments ◽  
Chloride Resistance ◽  
Concrete Cylinders

This study investigated compressive strength, chloride penetration, and freeze-thaw resistance of multiwalled carbon nanotube (MWNT) concrete. More than 100 cylindrical specimens were used to assess test variables during sensitivity observations, including water-cement ratios (0.75, 0.5, and 0.4) and exposure to chemical agents (including gum arabic, propanol, ethanol, sodium polyacrylate, methylcellulose, sodium dodecyl sulfate, and silane). To determine the adequate sonication time for MWNT dispersal in water, the compressive strengths of MWNT concrete cylinders were measured after sonication times ranging from 2 to 24 minutes. The results demonstrated that the addition of MWNT can increase the compressive strength of concrete by up to 108%. However, without chemical treatment, MWNT concretes tend to have poor freeze-thaw resistance. Among the different chemical treatments, MWNT concrete treated with sodium polyacrylate has the best compressive strength, chloride resistance, and freeze-thaw durability.

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