A novel polymer electrolyte based on oligo(ethylene glycol) 600, K2PdCl4, and K3Fe(CN)6

1997 ◽  
Vol 12 (12) ◽  
pp. 3393-3403 ◽  
Author(s):  
Vito Di Noto
Keyword(s):  
Ethylene Glycol ◽  
Analytical Data ◽  
Conductivity Measurements ◽  
Poly Ethylene Glycol ◽  
Ir Studies ◽  
Structure Morphology ◽  
Different Temperatures ◽  
Ft Ir ◽  
Poly Ethylene ◽  
Peg 600

New electrolytic systems were prepared by reacting K3Fe(CN)6 and K2PdCl4 in a mixture of water and poly(ethylene glycol) 600 (PEG). The reaction occurs in two steps: first a gel is formed, which then shrinks, releasing the solvent. The product thus obtained has the consistency of a smooth, solid plastic paste and is very stable. The influence of the reaction mixture on the structure, morphology, and conductivity of the products was investigated carrying out three preparations (I, II, III) at increasing ratio PEG 600/H2O. By FT-IR studies and analytical data it was concluded that these materials are inorganic-organic networks containing CN bridges between Fe and Pd atoms and PEG 600 bridges between Pd atoms. Scanning electron microscopy studies revealed that the morphology of polymers I, II, and III is significantly influenced by the conditions of the synthesis. Conductivity measurements made at different temperatures showed that polymers I, II, and III conduct ionically. The conductivity of polymer I, which was synthesized with the highest water/PEG 600 ratio, is on the order of 1.4 · 10−3 Sycm at 25 °C.

scholarly journals Enhanced dispersion stability of gold nanoparticles by the physisorption of cyclic poly(ethylene glycol)

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yubo Wang ◽  
Jose Enrico Q. Quinsaat ◽  
Tomoko Ono ◽  
Masatoshi Maeki ◽  
Manabu Tokeshi ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ethylene Glycol ◽  
Dispersion Stability ◽  
Chemical Inhomogeneity ◽  
Poly Ethylene Glycol ◽  
Alternative Approach ◽  
Ft Ir ◽  
Poly Ethylene ◽  
Tumor Accumulation ◽  
Key Techniques

AbstractNano-sized metal particles are attracting much interest in industrial and biomedical applications due to the recent progress and development of nanotechnology, and the surface-modifications by appropriate polymers are key techniques to stably express their characteristics. Herein, we applied cyclic poly(ethylene glycol) (c-PEG), having no chemical inhomogeneity, to provide a polymer topology-dependent stabilization for the surface-modification of gold nanoparticles (AuNPs) through physisorption. By simply mixing c-PEG, but not linear counterparts, enables AuNPs to maintain dispersibility through freezing, lyophilization, or heating. Surprisingly, c-PEG endowed AuNPs with even better dispersion stability than thiolated PEG (HS–PEG–OMe). The stronger affinity of c-PEG was confirmed by DLS, ζ-potential, and FT-IR. Furthermore, the c-PEG system exhibited prolonged blood circulation and enhanced tumor accumulation in mice. Our data suggests that c-PEG induces physisorption on AuNPs, supplying sufficient stability toward bio-medical applications, and would be an alternative approach to the gold–sulfur chemisorption.

scholarly journals Study of liquid-liquid equilibria in aqueous two-phase systems formed by poly (ethylene glycol) (PEG) and sodium thiosulfate pentahydrate (Na2S2O3.5H2O) at different temperatures

2018 ◽  
Vol 476 ◽  
pp. 118-125 ◽  
Author(s):  
Amanda Cristina de Oliveira ◽  
Filipe Hobi Bordon Sosa ◽  
Mariana Conceição da Costa ◽  
Elias de Souza Monteiro Filho ◽  
Roberta Ceriani
Keyword(s):  
Ethylene Glycol ◽  
Sodium Thiosulfate ◽  
Poly Ethylene Glycol ◽  
Two Phase ◽  
Different Temperatures ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Poly Ethylene

scholarly journals Liquid-Liquid Equilibrium of Poly(Ethylene Glycol) 6000 + Sodium Succinate + Water System at Different Temperatures

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Selvaraj Raja ◽  
Vytla Ramachandra Murty
Keyword(s):  
Ethylene Glycol ◽  
Sodium Succinate ◽  
Water System ◽  
Type Equation ◽  
Effect Of Temperature ◽  
Poly Ethylene Glycol ◽  
Peg 6000 ◽  
Different Temperatures ◽  
Tie Lines ◽  
Poly Ethylene

Phase diagrams and the compositions of coexisting phases of poly(ethylene glycol) (PEG) 6000 + sodium succinate + water system have been determined experimentally at 298.15, 308.15, and 318.15 K. The effects of temperature on the binodal curve and tie lines have been studied. The binodal curves were successfully fitted to a nonlinear equation relating the concentrations of PEG 6000 and sodium succinate, and the coefficients were estimated for the formentioned systems (low AARD, highR2, and low SD). Tie-line compositions were estimated and correlated using Othmer-Tobias and Bancroft equations, and the parameters were reported. The effect of temperature on the phase-forming ability has been studied by fitting the binodal data to a Setschenow-type equation for each temperature. The effective excluded volume (EEV) values were also calculated from the binodal data, and it was found out that the values increased with an increase in the temperature. Furthermore, the effect of MW of PEG on the phase diagram has been studied and verified.

scholarly journals Density, Refractive Index, Apparent Specific Volume, and Electrical Conductivity of Aqueous Solutions of Poly(ethylene glycol) 1500 at Different Temperatures

2014 ◽  
Vol 59 (2) ◽  
pp. 339-345 ◽  
Author(s):  
Bernardo de Sá Costa ◽  
Edwin Elard Garcia-Rojas ◽  
Jane Sélia dos Reis Coimbra ◽  
José Antônio Teixeira ◽  
Javier Telis-Romero
Keyword(s):  
Electrical Conductivity ◽  
Refractive Index ◽  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Specific Volume ◽  
Poly Ethylene Glycol ◽  
Different Temperatures ◽  
Poly Ethylene
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