Microwave Assisted Blending-Intercalation of Ion-Conductor Polymers into Layered Silicates

1998 ◽  
Vol 519 ◽  
Author(s):  
P. Aranda ◽  
J.C. Galván ◽  
E. Ruiz-Hitzky
Keyword(s):  
Electrical Impedance ◽  
Polymer Melt ◽  
Electrical Impedance Spectroscopy ◽  
Layered Silicates ◽  
Alternative Procedure ◽  
Ion Conductor ◽  
Microwave Assisted ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

AbstractOrgano-inorganic hybrid nancomposites derived from poly(ethylene oxide) and montmorillonite silicate are prepared by an alternative procedure to classical polymer intercalation either from solutions or by polymer melt-intercalation. XRD, FTIR, DSC, elemental microanalysis and SEM techniques are applied for structural characterization of the resulting materials. The electrical properties of these nanocomposites are studied by means of the electrical impedance spectroscopy (EIS) showing enhanced ionic conductivity compared to similar samples prepared by intercalation from solution.

Dielectric Studies of Proton Conducting Polymer Electrolyte Based on Chitosan/PEO Blend Doped with NH4NO3

2012 ◽  
Vol 488-489 ◽  
pp. 583-587 ◽  
Author(s):  
M.F. Shukur ◽  
M.F.Z. Kadir ◽  
Z. Ahmad ◽  
R. Ithnin
Keyword(s):  
Electrical Impedance ◽  
Electric Modulus ◽  
Ionic Conduction ◽  
Charge Carriers ◽  
Electrical Impedance Spectroscopy ◽  
Low Frequencies ◽  
Solution Cast ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Solution Cast Method

Polymer blend of chitosan and poly(ethylene oxide) (PEO) electrolytes were prepared by employing solution cast method. Ammonium nitrate (NH4NO3) was added to the blend to supply the charge carriers for ionic conduction. The impedance of the electrolytes was measured by electrical impedance spectroscopy (EIS) over the frequency range of 50 Hz to 1 MHz. The permittivity ɛr and electric modulus Mr of the complex were analyzed. Dispersion at low frequencies caused by space charge effect from the electrodes was observed. The modulus plots indicated that the dispersion deviated from the Debye behaviour. The relaxation time, τ decreased to 1.64 × 10-7 s as the NH4NO3 content was increased up to 40 wt.%.

Electrical impedance spectroscopy for the characterization of skin barrier in atopic dermatitis

Allergy ◽  
2021 ◽  
Author(s):  
Arturo O. Rinaldi ◽  
Angelica Korsfeldt ◽  
Siobhan Ward ◽  
Daniel Burla ◽  
Anita Dreher ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Impedance Spectroscopy ◽  
Electrical Impedance ◽  
Skin Barrier ◽  
Electrical Impedance Spectroscopy

scholarly journals In Situ Dielectric Characterization of Poly(ethylene oxide) Melts Containing Lithium Perchlorate under Steady Shear Flow

2004 ◽  
Vol 37 (18) ◽  
pp. 7064-7064
Author(s):  
Yumi Matsumiya ◽  
Nitash P. Balsara ◽  
John B. Kerr ◽  
Tadashi Inoue ◽  
Hiroshi Watanabe
Keyword(s):  
Shear Flow ◽  
Ethylene Oxide ◽  
Lithium Perchlorate ◽  
Dielectric Characterization ◽  
Steady Shear Flow ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Oxide Melts

scholarly journals Preparation and Characterization of PEBAX-5513/AgBF4/BMIMBF4 Membranes for Olefin/Paraffin Separation

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1550 ◽  
Author(s):  
So Young Kim ◽  
Younghyun Cho ◽  
Sang Wook Kang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Poor Performance ◽  
Amide Group ◽  
Stabilizing Effect ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Scanning Electron

In this study, we investigated a poly(ether-block-amide)-5513 (PEBAX-5513)/AgBF4/1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) composite membrane, which is expected to have a high stabilizing effect on the Ag+ ions functioning as olefin carriers in the amide group. Poly(ethylene oxide) (PEO) only consists of ether regions, whereas the PEBAX-5513 copolymer contains both ether and amide regions. However, given the brittle nature of the amide, the penetration of BMIMBF4 remains challenging. The nanoparticles did not stabilize after their formation in the long-term test, thereby resulting in a poor performance compared to previous experiments using PEO as the polymer (selectivity 3; permeance 12.3 GPU). The properties of the functional groups in the polymers were assessed using Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis, which confirmed that the properties endowed during the production of the film using the ionic liquid can impact the performance.

Characterization of Polymer Clay Nanocomposite Electrolyte Motions via Combined NMR and Neutron Scattering Studies

2002 ◽  
Vol 756 ◽  
Author(s):  
Luis J. Smith ◽  
Jean-Marc Zanotti ◽  
Giselle Sandi ◽  
Kathleen A. Carrado ◽  
Patrice Porion ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Mean Square Displacement ◽  
Polymer Clay Nanocomposite ◽  
Scattering Measurements ◽  
Lower Activation ◽  
Poly Ethylene Oxide ◽  
Nanocomposite Electrolyte ◽  
The Mean ◽  
Poly Ethylene

ABSTRACTThe activation energies for poly(ethylene oxide) motion in a polymer clay composite are reported for the polymer intercalated and external to the clay. PEO intercalated into the clay is found to have a lower activation energy for motion but also a larger Arrhenius prefactor, by almost two orders of magnitude, than for PEO found external to the clay. Neutron scattering measurements confirm the presence of two environments and the effects of confinement on the mean square displacement of the PEO.

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