scholarly journals Systematic Approaches To Tailor the Morphologies and Transport Properties of Solution-Cast Sulfonated Pentablock Copolymers

2018 ◽  
Vol 1 (1) ◽  
pp. 8-17 ◽  
Author(s):  
Phuc V. Truong ◽  
Rephayah L. Black ◽  
Jonathan P. Coote ◽  
Byeongdu Lee ◽  
Haleh Ardebili ◽  
...  
Keyword(s):  
Transport Properties ◽  
Solution Cast ◽  
Pentablock Copolymers

scholarly journals Study of the Effect of Inorganic Particles on the Gas Transport Properties of Glassy Polyimides for Selective CO2 and H2O Separation

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 128 ◽  
Author(s):  
Sara Escorihuela ◽  
Lucía Valero ◽  
Alberto Tena ◽  
Sergey Shishatskiy ◽  
Sonia Escolástico ◽  
...  
Keyword(s):  
Transport Properties ◽  
Elevated Temperatures ◽  
Gas Transport ◽  
Promising Result ◽  
High Water ◽  
Mixed Matrix Membranes ◽  
Membrane Thickness ◽  
Inorganic Particles ◽  
Gas Transport Properties ◽  
Solution Cast

Three polyimides and six inorganic fillers in a form of nanometer-sized particles were studied as thick film solution cast mixed matrix membranes (MMMs) for the transport of CO2, CH4, and H2O. Gas transport properties and electron microscopy images indicate good polymer-filler compatibility for all membranes. The only filler type thatdemonstrated good distribution throughout the membrane thickness at 10 wt. % loading was BaCe0.2Zr0.7Y0.1O3 (BCZY). The influence of this filler on MMM gas transport properties was studied in detail for 6FDA-6FpDA in a filler content range from one to 20 wt. % and for Matrimid® and P84® at 10 wt. % loading. The most promising result was obtained for Matrimid®—10wt. % BCZY MMM, which showed improvement in CO2 and H2O permeabilities accompanied by increased CO2/CH4 selectivity and high water selective membrane at elevated temperatures without H2O/permanent gas selectivity loss.

Ion transport properties of mechanically stable symmetric ABCBA pentablock copolymers with quaternary ammonium functionalized midblock

2017 ◽  
Vol 55 (7) ◽  
pp. 612-622 ◽  
Author(s):  
S. Piril Ertem ◽  
Benjamin R. Caire ◽  
Tsung-Han Tsai ◽  
Di Zeng ◽  
Melissa A. Vandiver ◽  
...  
Keyword(s):  
Ion Transport ◽  
Transport Properties ◽  
Quaternary Ammonium ◽  
Pentablock Copolymers

Structure and transport properties of solution-cast Nafion® membranes subjected to hygrothermal aging

2013 ◽  
Vol 435 ◽  
pp. 242-252 ◽  
Author(s):  
Floraine M. Collette ◽  
Francette Thominette ◽  
Hakima Mendil-Jakani ◽  
Gérard Gebel
Keyword(s):  
Transport Properties ◽  
Hygrothermal Aging ◽  
Solution Cast

Gas transport properties of solution-cast perfluorosulfonic acid ionomer films containing ionic surfactants

1993 ◽  
Vol 84 (1-2) ◽  
pp. 161-169 ◽  
Author(s):  
John Pellegrino ◽  
Deyan Wang ◽  
Roberto Rabago ◽  
Richard Noble ◽  
Carl Koval
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Ionic Surfactants ◽  
Perfluorosulfonic Acid ◽  
Gas Transport Properties ◽  
Solution Cast

Influence of Nano-Filler Concentration on Transport Properties of PVA-PEO Blend Systems

2016 ◽  
Vol 1141 ◽  
pp. 19-23
Author(s):  
Prajakta Joge ◽  
Dinesh K. Kanchan
Keyword(s):  
Transport Properties ◽  
Transport Number ◽  
Filler Concentration ◽  
Ionic Transport Number ◽  
Polarization Technique ◽  
Solution Cast ◽  
Blend Polymer Electrolyte ◽  
Blend Polymer ◽  
Dc Polarization ◽  
Cast Technique

In the present study, two different PVA-PEO nanocomposite blend polymer electrolyte systems viz., System-I: [(PVA)(42.5):(PEO)(42.5):(AgNO3)(5):(PEG)(10):(Al2O3)(x)] and System-II: [(PVA)(47):(PEO)(47):(LiCF3SO3)(9):(EC)(6):(Al2O3)(x)] are prepared using solution cast technique for various Al2O3 nanofiller amounts ranging from 2 to 10 wt%. The influence of Al2O3 concentration on the transport properties of the electrolytes of both these systems is closely inspected. Here, the ionic transport number (ti) measurements of the blend specimens are carried out using ‘dc Polarization Technique’.

scholarly journals Study of the Effect of Inorganic Particles on the Gas Transport Properties of Glassy Polyimides for Selective CO2 and H2O Separation

2018 ◽  
Author(s):  
Sara Escorihuela ◽  
Lucia Valero ◽  
Alberto Tena ◽  
Sergey Shishatskiy ◽  
Sonia Escolastico ◽  
...  
Keyword(s):  
Transport Properties ◽  
Elevated Temperatures ◽  
Gas Transport ◽  
Promising Result ◽  
High Water ◽  
Mixed Matrix Membranes ◽  
Membrane Thickness ◽  
Inorganic Particles ◽  
Gas Transport Properties ◽  
Solution Cast

Three polyimides and six inorganic fillers in a form of nanometer-sized particles were studied as thick film solution cast mixed matrix membranes (MMMs) for transport of CO2, CH4 and H2O. Gas transport properties and electron microscopy images indicate good polymer-filler compatibility for all membranes. The only filler type which demonstrated good distribution throughout the membrane thickness at 10 wt. % loading was BaCe0.2Zr0.7Y0.1O3 (BCZY). The influence of this filler on MMM gas transport properties was studied in detail for 6FDA-6FpDA in a filler content range from 1 to 20 wt.% and for Matrimid® and P84® at 10 wt. % loading. The most promising result was obtained for Matrimid® - 10wt% BCZY MMM, which showed improvement in CO2 and H2O permeabilities accompanied by increased CO2/CH4 selectivity and high water selective membrane at elevated temperatures without H2O/permanent gas selectivity loss.

scholarly journals A Polymer Blend Electrolyte Based on CS with Enhanced Ion Transport and Electrochemical Properties for Electrical Double Layer Capacitor Applications

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 930
Author(s):  
Shujahadeen B. Aziz ◽  
Elham M. A. Dannoun ◽  
Muhamad H. Hamsan ◽  
Hewa O. O. Ghareeb ◽  
Muaffaq M. Nofal ◽  
...  
Keyword(s):  
Ion Transport ◽  
Transport Properties ◽  
Polymer Electrolyte ◽  
Internal Resistance ◽  
Transport Parameter ◽  
Transport Parameters ◽  
Double Layer Capacitor ◽  
Solution Cast ◽  
Polymer Blend Electrolyte ◽  
Good Agreement

The fabrication of energy storage EDLC in this work is achieved with the implementation of a conducting chitosan–methylcellulose–NH4NO3–glycerol polymer electrolyte system. The simple solution cast method has been used to prepare the electrolyte. The impedance of the samples was fitted with equivalent circuits to design the circuit diagram. The parameters associated with ion transport are well studied at various plasticizer concentrations. The FTIR investigation has been done on the films to detect the interaction that occurs among plasticizer and polymer electrolyte. To get more insights into ion transport parameters, the FTIR was deconvoluted. The transport properties achieved from both impedance and FTIR are discussed in detail. It was discovered that the transport parameter findings are in good agreement with both impedance and FTIR studies. A sample with high transport properties was characterized for ion dominancy and stability through the TNM and LSV investigations. The dominancy of ions in the electrolyte verified as the tion of the electrolyte is established to be 0.933 whereas it is potentially stable up to 1.87 V. The rechargeability of the EDLC is steady up to 500 cycles. The internal resistance, energy density, and power density of the EDLC at the 1st cycle are 53 ohms, 6.97 Wh/kg, and 1941 W/kg, respectively.

Spectroscopic Diagnostics of Tokamaks

1988 ◽  
Vol 102 ◽  
pp. 165-174
Author(s):  
C. de Michelis
Keyword(s):  
Transport Properties ◽  
Power Losses ◽  
Spectroscopic Diagnostics ◽  
Important Concern

AbstractImpurities being an important concern in tokamaks, spectroscopy plays a key role in their understanding. Techniques for the evaluation of concentrations, power losses and transport properties are surveyed, and a few developments are outlined.

Structure and Orientation of As Precipitates in LT-MBE Grown GaAs

1991 ◽  
Vol 49 ◽  
pp. 900-901 ◽  
Author(s):  
Alain Claverie ◽  
Zuzanna Liliental-Weber
Keyword(s):  
Transport Properties ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Lattice Parameter ◽  
Crystalline Quality ◽  
Insulating Properties ◽  
Lt Gaas

GaAs layers grown by MBE at low temperatures (in the 200°C range, LT-GaAs) have been reported to have very interesting electronic and transport properties. Previous studies have shown that, before annealing, the crystalline quality of the layers is related to the growth temperature. Lowering the temperature or increasing the layer thickness generally results in some columnar polycrystalline growth. For the best “temperature-thickness” combinations, the layers may be very As rich (up to 1.25%) resulting in an up to 0.15% increase of the lattice parameter, consistent with the excess As. Only after annealing are the technologically important semi-insulating properties of these layers observed. When annealed in As atmosphere at about 600°C a decrease of the lattice parameter to the substrate value is observed. TEM studies show formation of precipitates which are supposed to be As related since the average As concentration remains almost unchanged upon annealing.

Morphological transformations in solution-cast Styrene-Butadiene-Styrene (SBS) triblock copolymer thin films

1995 ◽  
Vol 53 ◽  
pp. 184-185
Author(s):  
Ginam Kim ◽  
W. Marsillo ◽  
M. Libera
Keyword(s):  
Thin Films ◽  
Triblock Copolymer ◽  
Annealing Treatment ◽  
Minor Component ◽  
Solvent Evaporation ◽  
Single Crystal Substrate ◽  
Transparent Films ◽  
Crystal Substrate ◽  
Solution Cast ◽  
Morphological Transformations

The fact that block copolymers can assume a range of morphologies depending upon such variables as relative block length and molecular weight is now well known. In the case of poly(styrene)[PS]-poly(butadiene)[PB]-poly(styrene) (SBS) triblock copolymer, the morphologies range from spheres (roughly ~20% minor component), to cylinders (roughly 20%~35% minor component), to lamellae (roughly equal component fractions) Most recently, there has been increasing interest in transformations between morphologies by thermal annealing. This paper describes initial results studying the effect of solvent evaporation rate and post-casting annealing treatment on the morphology of SBS thin films.TEM specimens were prepared by solution casting electron transparent films. 50 μl of 0.1 wt% SBS (30% styrene, Mw=14,000, Scientific Polymer Products, Inc.) dissolved in toluene was deposited on a polished NaCl single crystal substrate placed in a small dish. After solvent evaporation the film was cut into small squares, floated from the salt in water, and each square was collected on a Cu grid.

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