Thermally treated polyaniline/polybenzimidazole blend membranes: Structural changes and gas transport properties

2017 ◽  
Vol 537 ◽  
pp. 315-322 ◽  
Author(s):  
V. Giel ◽  
Z. Morávková ◽  
J. Peter ◽  
M. Trchová
Keyword(s):  
Transport Properties ◽  
Structural Changes ◽  
Gas Transport ◽  
Gas Transport Properties ◽  
Blend Membranes ◽  
Thermally Treated

Characterization and gas transport properties of poly(lactic acid) blend membranes

Desalination ◽  
2008 ◽  
Vol 234 (1-3) ◽  
pp. 212-220 ◽  
Author(s):  
Tomomi Komatsuka ◽  
Akira Kusakabe ◽  
Kazukiyo Nagai
Keyword(s):  
Lactic Acid ◽  
Transport Properties ◽  
Gas Transport ◽  
Poly Lactic Acid ◽  
Gas Transport Properties ◽  
Blend Membranes

The evolution of poly(hydroxyamide amic acid) to poly(benzoxazole) via stepwise thermal cyclization: Structural changes and gas transport properties

Polymer ◽  
2011 ◽  
Vol 52 (22) ◽  
pp. 5127-5138 ◽  
Author(s):  
Huan Wang ◽  
Songlin Liu ◽  
Tai-Shung Chung ◽  
Hongmin Chen ◽  
Yan-Ching Jean ◽  
...  
Keyword(s):  
Transport Properties ◽  
Structural Changes ◽  
Gas Transport ◽  
Amic Acid ◽  
Thermal Cyclization ◽  
Gas Transport Properties

Gas Transport Properties and Structure of Poly(2,6-dimethyl-1,4-phenylene oxide)/Poly(N-arylmaleimide) Membranes

1993 ◽  
Vol 58 (11) ◽  
pp. 2552-2558
Author(s):  
Jan Lokaj ◽  
Miroslav Bleha ◽  
Zbyněk Pientka ◽  
František Lednický
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transport Properties ◽  
Gas Transport ◽  
Permeability Ratio ◽  
Phenylene Oxide ◽  
Gas Transport Properties ◽  
Blend Membranes ◽  
Derivatives Of ◽  
Scanning Electron

Blend membranes containing poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and homopolymers of substituted N-phenmylmaleimides were prepared by casting from chloroform solutions of mixtures of the polymers. The polyimides were synthesized by the radical polymerization of dimethylamino, chloro, and bromo derivatives of N-phenylmaleimide. The membranes were characterized by permeabilities to oxygen and nitrogen; the permeability ratio O2/N2 equaled to 5.3 - 6.8. Unlike transparent PPO membranes, PPO/polyimide membranes were cloudy. The phase structure of the membranes was examined by optical and scanning electron microscopy. The relation between gas transport properties and the structure of the membranes is discussed.

Gas transport properties of hyperbranched polyimide/hydroxy polyimide blend membranes

2012 ◽  
Vol 48 (8) ◽  
pp. 1504-1512 ◽  
Author(s):  
Tomoyuki Suzuki ◽  
Masako Miki ◽  
Yasuharu Yamada
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Gas Transport Properties ◽  
Blend Membranes

The Effect of the Type and Concentration of the Crosslinking Diene on the Gas Transport Properties of Membranes Based on Polyoctylmethylsiloxane

2020 ◽  
Vol 2 (6) ◽  
pp. 399-406
Author(s):  
E. A. Grushevenko ◽  
I. L. Borisov ◽  
D. S. Bakhtin ◽  
V. V. Volkov ◽  
A. V. Volkov
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Gas Transport Properties

New poly(ether imide)s with pendant di-tert-butyl groups: Synthesis, characterization and gas transport properties

2019 ◽  
Vol 217 ◽  
pp. 183-194 ◽  
Author(s):  
N. Belov ◽  
R. Chatterjee ◽  
R. Nikiforov ◽  
V. Ryzhikh ◽  
S. Bisoi ◽  
...  
Keyword(s):  
Transport Properties ◽  
Gas Transport ◽  
Tert Butyl ◽  
Gas Transport Properties

scholarly journals A Molecular Simulation Study of Silica/Polysulfone Mixed Matrix Membrane for Mixed Gas Separation

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2199
Author(s):  
Khadija Asif ◽  
Serene Sow Mun Lock ◽  
Syed Ali Ammar Taqvi ◽  
Norwahyu Jusoh ◽  
Chung Loong Yiin ◽  
...  
Keyword(s):  
Transport Properties ◽  
Molecular Simulation ◽  
Gas Separation ◽  
Membrane Separation ◽  
Gas Transport ◽  
Mixed Matrix ◽  
Mixed Gas ◽  
Gas Transport Properties ◽  
Simulation Results ◽  
Mixed Gases

Polysulfone-based mixed matrix membranes (MMMs) incorporated with silica nanoparticles are a new generation material under ongoing research and development for gas separation. However, the attributes of a better-performing MMM cannot be precisely studied under experimental conditions. Thus, it requires an atomistic scale study to elucidate the separation performance of silica/polysulfone MMMs. As most of the research work and empirical models for gas transport properties have been limited to pure gas, a computational framework for molecular simulation is required to study the mixed gas transport properties in silica/polysulfone MMMs to reflect real membrane separation. In this work, Monte Carlo (MC) and molecular dynamics (MD) simulations were employed to study the solubility and diffusivity of CO2/CH4 with varying gas concentrations (i.e., 30% CO2/CH4, 50% CO2/CH4, and 70% CO2/CH4) and silica content (i.e., 15–30 wt.%). The accuracy of the simulated structures was validated with published literature, followed by the study of the gas transport properties at 308.15 K and 1 atm. Simulation results concluded an increase in the free volume with an increasing weight percentage of silica. It was also found that pure gas consistently exhibited higher gas transport properties when compared to mixed gas conditions. The results also showed a competitive gas transport performance for mixed gases, which is more apparent when CO2 increases. In this context, an increment in the permeation was observed for mixed gas with increasing gas concentrations (i.e., 70% CO2/CH4 > 50% CO2/CH4 > 30% CO2/CH4). The diffusivity, solubility, and permeability of the mixed gases were consistently increasing until 25 wt.%, followed by a decrease for 30 wt.% of silica. An empirical model based on a parallel resistance approach was developed by incorporating mathematical formulations for solubility and permeability. The model results were compared with simulation results to quantify the effect of mixed gas transport, which showed an 18% and 15% percentage error for the permeability and solubility, respectively, in comparison to the simulation data. This study provides a basis for future understanding of MMMs using molecular simulations and modeling techniques for mixed gas conditions that demonstrate real membrane separation.

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