Thermoresponsive behaviors of novel polyoxyethylene-functionalized acrylamide copolymers: Water solubility, rheological properties and surface activity

2020 ◽  
Vol 319 ◽  
pp. 114337
Author(s):  
Yang He ◽  
Shaohua Gou ◽  
Yanting Zhou ◽  
Lihua Zhou ◽  
Lan Tang ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Surface Activity ◽  
Water Solubility ◽  
Acrylamide Copolymers

Water Solubility and Surface Activity of Alkoxyethyl β-d-Maltosides

2020 ◽  
Vol 68 (31) ◽  
pp. 8330-8340
Author(s):  
Fang Fu ◽  
Yulin Fan ◽  
Langqiu Chen ◽  
Jing Zhang ◽  
Jiping Li
Keyword(s):  
Surface Activity ◽  
Water Solubility

scholarly journals Improvements in gelatin cold water solubility after electrospinning and associated physicochemical, functional and rheological properties

2020 ◽  
Vol 104 ◽  
pp. 105740 ◽  
Author(s):  
Behrouz Ghorani ◽  
Bahareh Emadzadeh ◽  
Hassan Rezaeinia ◽  
Stephen.J. Russell
Keyword(s):  
Rheological Properties ◽  
Water Solubility ◽  
Cold Water

Water contents of felsic melts: application to the rheological properties of granitic magmas

1996 ◽  
Vol 87 (1-2) ◽  
pp. 57-64 ◽  
Author(s):  
F. Holtz ◽  
B. Scaillet ◽  
H. Behrens ◽  
F. Schulze ◽  
M. Pichavant
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Properties ◽  
Water Solubility ◽  
Constant Pressure ◽  
Crustal Material ◽  
Crystal Fraction ◽  
Melt Water ◽  
Water Contents ◽  
Magma Viscosity

ABSTRACT:New experimental determinations of water solubility in haplogranitic melts (anhydrous compositions in the system Qz-Ab-Or and binary joins) and of the viscosity of hydrous Qz28Ab38Or34 melts (normative proportions) and natural peraluminous leucogranitic melt (Gangotri, High Himalaya) are used to constrain the evolution of viscosity of ascending magmas, depending on their P-T paths.At constant pressure, in the case of fluid-absent melting conditions, with water as the main volatile dissolved in the melts, the viscosity of melts generated from quartzo-feldspathic protoliths is lower at low temperature than at, high temperature (difference of 1-2 log units between 700 and 900°C). This is due to the higher water contents of the melts at low temperature than at high temperature and to the fact that decreasing temperature does not counterbalance the effect of increasing melt water content. In ascending magmas generated from crustal material the magma viscosity does not change significantly whatever the P-T path followed (i.e. path with cooling and crystallisation; adiabatic path with decompression melting) as long as the crystal fraction is low enough to assume a Newtonian behaviour (30-50% crystals, depending on size and shape). Comparison of the properties of natural and synthetic systems suggests that both water solubility and the viscosity of multicomponent natural felsic melts (with less than 30-35% normative Qz) can be extrapolated from those of the equivalent synthetic feldspar melts.

scholarly journals Functional and Rheological Properties of Vicia faba L. Protein Isolates

Biomolecules ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 178
Author(s):  
Daniel Żmudziński ◽  
Urszula Goik ◽  
Paweł Ptaszek
Keyword(s):  
Rheological Properties ◽  
Vicia Faba ◽  
Functional Properties ◽  
Water Solubility ◽  
Protein Isolate ◽  
Emulsifying Properties ◽  
Wide Range ◽  
Vicia Faba L ◽  
Alkaline Conditions ◽  
Main Protein

A protein isolate (85.5%) was obtained from the Vicia faba L. seeds. The main protein fraction, typical for the seeds of this plant, was found to be most numerous: Legumin (35 kDa) and Vicilin (45 kDa). The hydrodynamic and surface properties of isolate aqueous solutions were studied with the help of dynamic light scattering, ζ-potential, and tensometry in a wide range of concentrations and pH conditions. Selected functional properties, like foaming and emulsifying abilities, were studied. An increase of water solubility was shown with a raising pH, as well as a water holding capacity (WHC). The protein isolate showed a tendency to decrease the surface tension of water solutions, with high hydrophobicity and a negative charge of the isolate enhancing the foaming and emulsifying properties. The analysis of the concentration and the pH influence on selected functional properties indicated alkaline conditions as favorable for good foaming and emulsifying properties of the isolate and affected on their rheological properties.

Comb-shaped polyzwitterion with surface-activity obtained via N-maleoyl chitosan-modified HPAM for displacement of residual oil

2018 ◽  
Vol 42 (9) ◽  
pp. 6848-6857 ◽  
Author(s):  
Shiwei Li ◽  
Shaohua Gou ◽  
Xin Chen ◽  
Ming Duan
Keyword(s):  
Rheological Properties ◽  
Surface Activity ◽  
Residual Oil

Comb-shaped polyzwitterions with surface-activity were successfully synthesized and displayed superior rheological properties to enhance the displacement of residual oil.

Development of Fracturing Fluids Based on Acrylamide Copolymers and Study of Their Physical and Technological Properties Using the Oscillatory Rheometry Methods

2021 ◽  
Author(s):  
Maksim Vasilyevich Kazak ◽  
Sergey Igorevich Panin ◽  
Andrei Mikhailovich Valenkov ◽  
Tsimur Donalovich Hiliazitdzinau
Keyword(s):  
Aqueous Solutions ◽  
Rheological Properties ◽  
Elastic Properties ◽  
Technological Properties ◽  
Fracturing Fluid ◽  
Fracturing Fluids ◽  
Oscillatory Rheometry ◽  
Acrylamide Copolymers

Abstract This work studies the rheological properties of aqueous solutions of acrylamide copolymers. The prevailing role of elastic properties over viscous properties in predicting the proppant suspension capacity of the resulting fracturing fluid is shown. Furthermore, the potential of the use of oscillatory rheometry for studying fracturing fluid stability is demonstrated.

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