Dynamic Viscosity of Binary and Ternary Mixtures Containing Poly(Ethylene Glycol), Potassium Phosphate, and Water

2004 ◽  
Vol 49 (5) ◽  
pp. 1340-1343 ◽  
Author(s):  
Javier Telis-Romero ◽  
Jane S. R. Coimbra ◽  
Ana Lúcia Gabas ◽  
Edwin E. Garcia Rojas ◽  
Luis A. Minim ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Dynamic Viscosity ◽  
Potassium Phosphate ◽  
Ternary Mixtures ◽  
Poly Ethylene Glycol ◽  
Binary And Ternary Mixtures ◽  
Poly Ethylene

Density and Viscosity of Binary and Ternary Mixtures of Poly(ethylene glycol) and Poly(acrylic acid, sodium salt) at Temperatures of (288.15 to 318.15) K

2010 ◽  
Vol 55 (6) ◽  
pp. 2328-2332 ◽  
Author(s):  
Luis A. Minim ◽  
Renata C. F. Bonomo ◽  
Isabella V. Amaral ◽  
Maycon F. T. Reis ◽  
Ana A. A. Oliveira ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Ethylene Glycol ◽  
Sodium Salt ◽  
Ternary Mixtures ◽  
Poly Ethylene Glycol ◽  
Acid Sodium Salt ◽  
Binary And Ternary Mixtures ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Interfacial Tension of Aqueous Two-Phase Systems Containing Poly(ethylene glycol) and Potassium Phosphate

2012 ◽  
Vol 57 (6) ◽  
pp. 1648-1652 ◽  
Author(s):  
Cássio Carmo de Oliveira ◽  
Jane Sélia dos Reis Coimbra ◽  
Abraham Damian Giraldo Zuniga ◽  
João Paulo Martins ◽  
Antonio Marcos de Oliveira Siqueira
Keyword(s):  
Interfacial Tension ◽  
Ethylene Glycol ◽  
Potassium Phosphate ◽  
Poly Ethylene Glycol ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Poly Ethylene

scholarly journals NePCM Based on Silver Dispersions in Poly(Ethylene Glycol) as a Stable Solution for Thermal Storage

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 19 ◽  
Author(s):  
Marco A. Marcos ◽  
David Cabaleiro ◽  
Samah Hamze ◽  
Laura Fedele ◽  
Sergio Bobbo ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Dynamic Viscosity ◽  
Stable Solution ◽  
Hydrodynamic Diameter ◽  
Poly Ethylene Glycol ◽  
Drop Shape ◽  
Poly Ethylene ◽  
Average Size ◽  
Designed Materials ◽  
Thermophysical Characterization

The main objective of this study is to design and characterize silver suspensions based on poly(ethylene glycol) PEG400, Ag/PEG400, as energy storage media for low-temperature applications. A polyvinylpyrrolidone (PVP) treatment was applied to ~22 nm silver nanoparticles to ensure good stability in poly(ethylene glycol). An array of different experimental techniques was utilized to analyze the molecular mass and purity of base poly(ethylene glycol), morphology of dry PVP-capped Ag nanoparticles, hydrodynamic average size of dispersed Ag particles, as well as thermal stability of PEG400 and Ag/PEG400 dispersions. Samples exhibited good temporal stabilities with average hydrodynamic diameter around 50 nm according to dynamic light scattering analyses. Melting and solidification transitions were investigated in terms of temperature and enthalpy from differential scanning calorimeter (DSC) thermograms. The thermophysical characterization was completed with thermal conductivity (k), dynamic viscosity (η), isobaric heat capacity (Cp), density (ρ), and surface tension (σ) measurements of designed materials using a Hot Disk thermal conductivimeter, a rotational rheometer, a DSC calorimeter working with a quasi-isothermal modulated method, a U-tube densimeter and a drop shape analyzer, respectively. For a nanoparticle loading of only 1.1% in mass, sub-cooling reduced by 7.1% and thermal conductive improved by 3.9%, with almost no penalization in dynamic viscosity (less than 5.4% of increase). Maximum modifications in Cp, ρ, and σ were 0.9%, 2.2%, and 2.2%, respectively. Experimental results were compared with the values provided by using different theoretical or semi-empirical equations. In particular, good descriptions of dynamic viscosity as functions of temperature and nanoparticle volume concentration were obtained by using the Vogel–Fulcher–Tammann equation and a first-order polynomial η( ϕ v , n p ) correlation, with absolute average deviations of 2.2% and 0.55%, respectively.

Dynamic viscosity versus probe-reported microviscosity of aqueous mixtures of poly(ethylene glycol)

2012 ◽  
Vol 45 (1) ◽  
pp. 137-144 ◽  
Author(s):  
Chhavi Bhanot ◽  
Shruti Trivedi ◽  
Arti Gupta ◽  
Shubha Pandey ◽  
Siddharth Pandey
Keyword(s):  
Ethylene Glycol ◽  
Dynamic Viscosity ◽  
Aqueous Mixtures ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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