Effect of Gas Permeation Temperature and Annealing Procedure on the Performance of Binary and Ternary Mixed Matrix Membranes of Polyethersulfone, SAPO-34, and 2-Hydroxy 5-Methyl Aniline

This study investigated the effect of annealing time and temperature on gas separation performance of mixed matrix membranes (MMMs) prepared from polyethersulfone (PES), SAPO-34, and 2-hydroxy 5-methyl aniline (HMA). A postannealing period at 120 degrees C for a week extensively increased the reproducibility and stability of MMMs, but for pure PES membranes no postannealing was necessary for stable and reproducible performance. The effect of operation temperature was also investigated. The permeabilities of H-2, CO2, and CH4 increased with increasing permeation temperature from 35 degrees C to 120 degrees C, yet CO2/CH4 and H-2/CH4 selectivities decreased. PES/SAPO-34/HMA ternary and PES/SAPO-34 binary MMMs exhibited the highest ideal selectivity and permeability values at all temperatures, respectively. For H-2/CO2 pair, when temperature increased from 35 degrees C to 120 degrees C, selectivity increased from 3.2 to 4.6 and H-2 permeability increased from 8 to 26.5 Barrer for ternary MMM, demonstrating the advantage of using this membrane at high temperatures. The activation energies were in the order of CH4 > H-2 > CO2 for all membranes. PES/SAPO-34/HMA membrane had activation energies higher than that of PES/SAPO-34 membrane, suggesting that HMA acts as a compatibilizer between the two phases. (C) 2014 Wiley Periodicals, Inc.


Effect of preparation parameters on performance of dense homogeneous polycarbonate gas separation membranes
Hacarlioglu, P; Toppare, Levent Kamil; Yılmaz, Levent (Wiley, 2003-10-17)
The aim of this study is to determine the effect of preparation parameters on the membrane permeation mechanism and separation performances of dense homogeneous poly(bisphenol A carbonate) (PC) membranes. Blade-casting and drop-casting techniques are used for casting films from solutions with varying concentrations. Chloroform and methylene chloride are used to determine the effect of the properties of the casting solvent. Permeation measurements are done with Ar, N-2, O-2, CH4, CO2, and H, gases. The selec...
Improved adhesive properties and bonding performance of HTPB-based polyurethane elastomer by using aziridine type bond promoter
Gercel, BO; Üner, Deniz; Pekel, F; Özkar, Saim (Wiley, 2001-05-02)
The effect of two aziridine-type bond promoters on adhesive and mechanical properties of a hydroxyl terminated polybutadiene-based elastomeric liner used in solid propellant rockets was investigated by varying the concentration to determine the optimum value. The performance of butyleneiminetrimesoylaziridine (BITA) was compared with that of tris[1-2-methylaziridinyl]phosphine oxide (MAPO) in the elastomeric liner of otherwise the same composition. The adhesive performance of the elastomer to the composite ...
Kinetic study of the reaction between hydroxyl-terminated polybutadiene and isophorone diisocyanate in bulk by quantitative FTIR spectroscopy
Kincal, D; Özkar, Saim (Wiley, 1997-12-05)
A kinetic study of the reaction between a hydroxyl-terminated polybutadiene (HTPB) and isophorone diisocyanate (IPDI) was carried out in the bulk state by using quantitative Fourier transform infrared(FTIR) spectroscopy. The reaction is shown to obey a second-order rate law, being first order in both the HTPB and IPDI concentrations. The activation parameters obtained from the evaluation of kinetic data are Delta H-double dagger = 41.1 +/- 0.4 kJ mol, Delta S-double dagger = -198 +/- 2 J K-1 mol(-1) and E-a...
Effect of Boron Phosphate on the Mechanical, Thermal and Fire Retardant Properties of Polypropylene and Polyamide-6 Fibers
DOĞAN, Mehmet; Bayramlı, Erdal (Springer Science and Business Media LLC, 2013-10-01)
The effect of boron phosphate (BPO4) nanoparticles on the mechanical, thermal, and flame retardant properties of polypropylene (PP) and polyamide 6 (PA-6) fibers are investigated by tensile testing, thermogravimetric analysis (TGA), differential scanning calorimeter (DSC), and micro combustion calorimeter (MCC). The addition of BPO4 reduces the mechanical properties of the both PP and PA-6 fibers. According to the TGA results, the addition of BPO4 does not change the thermal behavior of PP fiber and slightl...
Effect of low-energy electron irradiation on (Bi, Pb)-2212 superconductors
Ogun, SE; Goktas, H; Ozkan, H; Hasanlı, Nızamı (Elsevier BV, 2005-06-22)
The effect of low-energy electron irradiation on the properties of the Bi-based superconductors is studied. Two sets of polycrystalline (Bi, Pb)-2212 samples were synthesized by heating the appropriate mixtures of powders at 840 degrees C for 100 h, then quenched or furnace cooled to room temperature. The samples were irradiated by low-energy (1-10 keV), pulsed (20 ns) electron beam up to a dose of 6.2 x 10(15) cm(-2). X- ray diffraction patterns, resistance-temperature behaviours, critical currents, and mi...
Citation Formats
E. E. Oral, L. Yılmaz, and H. Kalıpçılar, “Effect of Gas Permeation Temperature and Annealing Procedure on the Performance of Binary and Ternary Mixed Matrix Membranes of Polyethersulfone, SAPO-34, and 2-Hydroxy 5-Methyl Aniline,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 0–0, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46612.