PEG–imidazolium-functionalized 6FDA–durene polyimide as a novel polymeric membrane for enhanced CO2 separation

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31083-31091 ◽  
Author(s):  
Irshad Kammakakam ◽  
SangYong Nam ◽  
Tae-Hyun Kim
Keyword(s):  
Ethylene Glycol ◽  
Polymeric Membrane ◽  
Co2 Separation ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Chain Lengths

A series of poly(ethylene glycol)–imidazolium-functionalized 6FDA–durene polyimides (PEG–Im-PIs) with a range of PEG chain lengths was developed.

scholarly journals Polymer Electrolytes Based on Borane/Poly(ethylene glycol) Methyl Ether for Lithium Batteries

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Ali Murat Soydan ◽  
Recep Akdeniz
Keyword(s):  
Ethylene Glycol ◽  
Methyl Ether ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Poly Ethylene Glycol ◽  
Scanning Calorimetry ◽  
Molar Ratios ◽  
Poly Ethylene ◽  
Chain Lengths ◽  
Glycol Methyl Ether

This work presents a different approach to preparing polymer electrolytes having borate ester groups for lithium ion batteries. The polymers were synthesized by reaction between poly(ethylene glycol) methyl ether (PEGME) and BH3-THF complex. Molecular weight of PEGMEs was changed with different chain lengths. Then the polymer electrolytes comprising boron were prepared by doping of the matrices with CF3SO3Li at various molar ratios with respect to EO to Li and they are abbreviated as PEGMEX-B-Y. The identification of the PEGME-borate esters was carried out by FTIR and 1H NMR spectroscopy. Thermal properties of these electrolytes were investigated via thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The ionic conductivity of these novel polymer electrolytes was studied by dielectric-impedance spectroscopy. Lithium ion conductivity of these electrolytes was changed by the length of PEGME as well as the doping ratios. They exhibit approximate conductivities of 10−4 S·cm−1 at 30°C and 10−3 S·cm−1 at 100°C.

scholarly journals Influence of Anion Structure on Thermal, Mechanical and CO2 Solubility Properties of UV-Cross-Linked Poly(ethylene glycol) Diacrylate Iongels

Membranes ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 46
Author(s):  
Ana P. S. Martins ◽  
Asier Fdz De Añastro ◽  
Jorge L. Olmedo-Martínez ◽  
Ana R. Nabais ◽  
Luísa A. Neves ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
High Performance ◽  
Mechanical Stability ◽  
Gas Permeability ◽  
Co2 Separation ◽  
Poly Ethylene Glycol ◽  
Co2 Solubility ◽  
Free Standing ◽  
Glycol Diacrylate ◽  
Poly Ethylene

Iongel-based CO2 separation membranes were prepared by fast (< 1 min) UV-initiated polymerization of poly(ethylene glycol) diacrylate (PEGDA) in the presence of different ionic liquids (ILs) with the [C2mim]+ cation and anions such as [TFSI]−, [FSI]−, [C(CN)3]− and [B(CN)4]−. The four ILs were completely miscible with the non-ionic PEGDA network. Transparent and free-standing iongels containing between 60 and 90 %wt of IL were obtained and characterized by diverse techniques (FTIR, TGA, DSC, DMTA, SEM, CO2 solubility and pure gas permeability). The thermal and mechanical stability of the iongels, as well as CO2 solubility, were found to be strictly dependent on the IL content and the anion’s nature. The TGA results indicated that the iongels mostly follow the thermal profile of the respective neat ILs. The DMTA analysis revealed that the iongels based on fluorinated anions have higher storage modulus than those of cyano-functionalized anions. Conversely, the PEGDA–C(CN)3 iongels presented the highest CO2 solubility values ranging from 72 to 80 mmol/g. Single CO2 permeabilities of 583 ± 29 Barrer and ideal CO2/N2 selectivities of 66 ± 3 were obtained with the PEGDA–70 C(CN)3 iongel membrane. This work demonstrates that the combination of PEGDA with high contents of the best performing ILs is a promising and simple strategy, opening up new possibilities in the design of high-performance iongel membranes for CO2 separation.

Quantitation of Poly(Ethylene Glycol) Concentration Using Raman Spectroscopy

1997 ◽  
Vol 51 (8) ◽  
pp. 1176-1178 ◽  
Author(s):  
Yanira Meléndez ◽  
Kimberley F. Schrum ◽  
Dor Ben-Amotz
Keyword(s):  
Raman Spectroscopy ◽  
Ethylene Glycol ◽  
Nonlinear Function ◽  
Weight Fraction ◽  
Raman Intensity ◽  
Poly Ethylene Glycol ◽  
Universal Scaling ◽  
Poly Ethylene ◽  
Chain Lengths ◽  
The Relationship

This study uses Raman spectroscopy to quantitate the amount of polymer in solution, in particular poly(ethylene glycol) dissolved in chloroform. For various chain lengths and polymer weight fraction ranges, it is shown that the ratios of peak intensities in the C–H stretching region may be used to quantitate polymer weight fraction with about 1% uncertainty. For low polymer weight fraction ranges (0–10%), the relationship between Raman intensity and polymer weight fraction is essentially linear, while at higher ranges (0–50%) the intensity follows a nonlinear function derived from basic concentration relationships and indicates a universal scaling with polymer chain length.

Equilibrium Swelling Behavior of Solid Supported Poly(ethylene glycol) Lipid Monolayers. Effects of Short Chain Lengths

Langmuir ◽  
2000 ◽  
Vol 16 (8) ◽  
pp. 3835-3845 ◽  
Author(s):  
Gerald Mathe ◽  
Christian Gege ◽  
Klaus R. Neumaier ◽  
Richard R. Schmidt ◽  
Erich Sackmann
Keyword(s):  
Ethylene Glycol ◽  
Swelling Behavior ◽  
Short Chain ◽  
Lipid Monolayers ◽  
Poly Ethylene Glycol ◽  
Equilibrium Swelling ◽  
Poly Ethylene ◽  
Chain Lengths
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