Synthesis and Characterization of Polyimide Mixed Matrix Membranes

Bakhtiari, Omid; Mosleh, Samira; Khosravi, Tayebeh; Mohammadi, Toraj

doi:10.1080/01496395.2011.589422

Cited by 24 publications

(12 citation statements)

References 43 publications

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“…Polyimide/zeolite composites were extensively studied especially in order to obtain materials for gas separation membranes [25][26][27][28][29][30][31][32]. For the polymers having high-glass transition temperatures, the rigid polymer backbone always creates difficulties that result in poor adhesion between polymer and zeolite particles [25].…”

Section: Introductionmentioning

confidence: 99%

The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films

Hamciuc¹,

Hamciuc²,

Okrasa

et al. 2012

J Mater Sci

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Zeolite L, with the ratio Si/Al = 4, was prepared by hydrothermal method and used to obtain composite films based on a polyimide matrix having pendant carboxylic groups. The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films was studied. The films were prepared by casting a suspension resulting from direct mixing of a poly(amic acid) (PAA) solution and zeolite L particles onto glass plates, followed by thermal imidization under controlled temperature conditions. The PAA was synthesized by solution polycondensation of a mixture of two diamines, 3,5-diaminobenzoic acid and 2,2-bis[4-(4-aminophenoxy)phenyl]propane (molar ratio 1:3), with 4,4 0 -oxydiphthalic anhydride, using N-methyl-2-pyrrolidone as solvent. To improve the compatibility between organic and inorganic phases, the surface of zeolite particles was modified by treating with 3-aminopropyltriethoxysilane. The surface morphology of the composite films investigated by scanning electron microscopy showed good compatibility between filler and polymer matrix. The films were flexible, tough, and exhibited high-thermal stability, having the initial decomposition temperature above 450°C. Dynamic mechanical analysis and dielectric spectroscopy revealed sub-glass transitions, c and b, and an a relaxation corresponding to the segmental motions above the glass transition temperature. The values of the dielectric constant at 10 kHz and 200°C were in the range of 3.3-4.2.

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Section: Introductionmentioning

confidence: 99%

The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films

Hamciuc¹,

Hamciuc²,

Okrasa

et al. 2012

J Mater Sci

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show abstract

“…[4][5][6][7][8][9][10][11][12][13][14][15][16] Precursors of polybenzo[azinoneimides as a thin selective layer of composite membrane on porous polyphenylene oxide support were studied in separation of aqueous solution of organic liquids (ethanol, isopropanol, acetone, and ethyl acetate) and organic-organic mixture (water-cyclohexane). 17 Nevertheless the peculiarity of structure and individual properties of developed membranes is unable to ensure an optimal separation factor and flux for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Study on polybenzoxazinone membrane in pervaporation processes

Pulyalina

Polotskaya

Goĭkhman

et al. 2013

J of Applied Polymer Sci

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Poly(benz-3,1-oxazinone-4) was prepared by thermal cyclization of its hydrolytically stable precursor polyamic acid. Both polymer and its precursor were investigated as membrane materials. Thermogravimetric analysis and contact angle measurements were carried out for characterization of peculiarity of membrane compositions and analysis of membrane surface. Pervaporation of water-isopropanol mixture was studied in the wide range of feed composition. To interpret the pervaporation transport properties of the membranes, swelling experiments were performed, kinetic curves of sorption and desorption were plotted, and basic sorption and diffusion parameters were analyzed. It was established that poly(benz-3,1-oxazinone-4) membrane is extremely effective in dehydration of water-isopropanol mixture and shows high separation factor.

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“…[1] While polymeric membranes have been widely used for membrane-based gas separation, there is a trade-off between the gas permeability and selectivity of polymeric membranes as shown by Robeson. [2,3] One way to enhance the performance of polymeric membranes is the fabrication of mixed matrix membranes (MMMs) in which nanoporous materials such as zeolites, [4,5] carbon nanotubes, [5,6] zeolite imidazolate frameworks (ZIFs), [7,8] carbon molecular sieves [5,9] or metal organic frameworks (MOFs) [10,11] are incorporated into polymers. Among these fillers, MOFs and ZIFs represent a relatively new group of crystalline nanoporous materials.…”

Section: Introductionmentioning

confidence: 99%

Molecular simulations of porous coordination network-based mixed matrix membranes for CO₂/N₂separations

Altıntaş

Keskin

2015

Molecular Simulation

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In this study, the challenge of selecting porous coordination networks (PCNs) as filler particles in mixed matrix membranes (MMMs) was examined using molecular simulations. PCNs are promising nanoporous materials in gas separations because of their tunable pore sizes, high porosities, good thermal and mechanical stabilities. Gas permeability and selectivity of 200 new MMMs composed of 20 different PCNs and 10 different polymers were calculated for CO 2 /N 2 separation. We showed that selecting the appropriate PCN as filler particles in polymers results in MMMs that have high CO 2 /N 2 selectivities and high CO 2 permeabilities compared with pure polymer membranes. Several PCN/polymer MMMs were identified to exceed the upper bound established for CO 2 /N 2 separation. Effect of framework flexibility of PCNs on the performance of MMMs was also examined. Results showed that considering the flexibility of PCNs is important for predicting gas permeability of pure PCNs but has less significance for predicting gas permeability of PCN-filled MMMs whenever the PCN volume fraction is low. For rapid screening of PCN/polymer MMMs, flexibility of the fillers can be neglected as a reasonable approximation if the filler volume fraction is , 0.3. The methods introduced in this study will create many opportunities for selecting PCN/polymer combinations for MMMs with useful properties in CO 2 separation applications.

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Synthesis and Characterization of Polyimide Mixed Matrix Membranes

Cited by 24 publications

References 43 publications

The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films

The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films

Study on polybenzoxazinone membrane in pervaporation processes

Molecular simulations of porous coordination network-based mixed matrix membranes for CO₂/N₂separations

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Synthesis and Characterization of Polyimide Mixed Matrix Membranes

Cited by 24 publications

References 43 publications

The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films

The effect of zeolite L content on dielectric behavior and thermal stability of polyimide thin films

Study on polybenzoxazinone membrane in pervaporation processes

Molecular simulations of porous coordination network-based mixed matrix membranes for CO2/N2separations

Contact Info

Product

Resources

About

Molecular simulations of porous coordination network-based mixed matrix membranes for CO₂/N₂separations