Functionalized graphene oxide/polyimide nanocomposites as highly CO2-selective membranes

Koolivand, Hadis; Sharif, Alireza; Razzaghi‐Kashani, Mehdi; Karimi, Mohammad; Salooki, Mahdi Koolivand; Semsarzadeh, Mohammad Ali

doi:10.1007/s10965-014-0599-9

Cited by 60 publications

(37 citation statements)

References 45 publications

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“…The glass transition temperature ( T g ) of pure PEI and PVAc membranes were found to be 208.7°C and 40.54°C, respectively. Glass transition temperature of PVAc was in agreement with the literature data but glass transition temperature of PEI was 9°C lower compared to literature . This behavior might be due to the presence of NMP solvent which acted as a plasticizer .…”

Section: Resultssupporting

confidence: 88%

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO₂/CH₄ separation

Mannan

Yih

Nasir

et al. 2018

Polymer Engineering & Sci

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This article presents fabrication, characterization, and performance evaluation of polyetherimide (PEI)/polyvinyl acetate (PVAc) blend membranes. Polymer blend membranes with various blend ratios of PEI/PVAc were prepared by solution casting and evaporation technique. Morphology and miscibility of polymer blend membranes were characterized by field emission scanning electron microscope (FESEM) and differential scanning calorimetry (DSC), respectively. The interaction between blend polymers was analyzed by FTIR analysis. Gas separation performance was evaluated in terms of permeability and selectivity. FESEM results revealed that pure polymer and blend membranes were homogeneous and dense in structure. A single glass transition temperature of polymer blend membranes was found in DSC analysis which indicated the miscibility of PEI/PVAc blend. FTIR analysis confirmed the presence of molecular interaction between blend polymers. The permeation results showed that the presence of PVAc (3 wt%) in blend membranes has improved CO2 permeability up to 95% compared to pure PEI membrane. In addition, CO2/CH4 selectivity was found to be 40% higher than pure PEI membrane. This study shows that blending a small fraction of PVAc can improve the gas separation performance of PEI/PVAc blend membranes. POLYM. ENG. SCI., 59:E293–E301, 2019. © 2018 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 88%

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO₂/CH₄ separation

Mannan

Yih

Nasir

et al. 2018

Polymer Engineering & Sci

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“…Moreover, the polar bond in carbon dioxide also makes it as favorable gas molecule and has a strong affinity with the polar PI polymer. Compared with the result of Koolivand, who found that the gas permeability was decreased with increasing the GO content in polyetherimide polymer, it can be concluded that the in‐situ polymerization approach enhances the dispersion of the NH 2 ‐GO in the polymer matrix, which improves the gas permeability of MMMs. The permeability of CO 2 increases more evidently in corporation with that of N 2 , and correspondingly the CO 2 /N 2 selectivity has been significantly improved by the incorporation of GO in the MMMs.…”

Section: Resultsmentioning

confidence: 80%

“…Therefore, how to fabricate the ideal structures by constructing the defect‐free interface between the inorganic filler and polymer matrix attracts more and more interests. Previous studies have indicated that the functionalization of the surface of GO is an effective solution to improve the interactions of nanoparticles and matrix . Wu's group synthesized the GO with different oxidation degrees by harsh oxidation of graphite using the improved Hummers method, which showed that GO functioned with oxygenated groups exhibited good hydrophilic properties, as well as better dispersion in the MMMs .…”

Section: Introductionmentioning

confidence: 99%

Preparation of mixed matrix membranes based on polyimide and aminated graphene oxide for CO₂ separation

Wang

Sun

et al. 2018

Polymers for Advanced Techs

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The aminated graphene oxide (GO) was prepared by the functionalization of pristine GO with ethylenediamine and then dispersed into the poly(amic acid) (the precursor of polyimide [PI]) solution followed by the chemical imidization to successfully fabricate the PI/amine‐functionalized GO mixed matrix membranes (MMMs) using in‐situ polymerization method. Chemical structure and morphology of the GO before and after amine modification were characterized by scanning electron microscopy, Raman spectrum, Fourier transform infrared, and X‐ray photoelectron spectroscopy. Scanning electron microscopy indicated that fine dispersion of GO throughout PI matrix was achieved, which indicates that the in‐situ polymerization approach can enhance the interfacial interaction between the GO and the PI matrix, and then improve the dispersion of carbon material in the polymer matrix. Compared with the conventional solution mixture method, the MMMs prepared with in‐situ polymerization method showed excellent CO2 permeability and CO2/N2 selectivity. The MMMs doped with 3 wt.% aminated GO exhibited maximum gas separation performance with a CO2 permeability of 12.34 Barrer and a CO2/N2 selectivity of 38.56. These results suggest that the amino groups on GO have strong interaction with the CO2 molecules, which can significantly increase the solubility of polar gas. Our results provide an easy and efficient way to prepare MMMs with good mechanical behavior and excellent gas separation performance.

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“…As shown in Figs 9 and 10, C 3 H 6 permeability, C 3 H 6 /C 3 H 8 ideal selectivity gradually increase with the increase of graphene nanosheets content from 0 to 1.125 wt‰, while C 3 H 8 permeability decreases with the content of graphene nanosheets increase from 0 to 0.375 wt‰ and then remain unchanged after 0.0375 wt‰ of graphene nanosheets loading. However, when the loading of the graphene nanosheets in the EC polymer matrix increases to 1.5 wt‰, both C 3 H 6 permeability and C 3 H 6 /C 3 H 8 ideal selectivity decrease, indicating that the graphene nanosheets are theoretically impermeable to all atoms and molecules, and greater loading in the MMMs could cause the agglomeration of the graphene nanosheets, resulting in the decrease of the effective surface area47484950. With 1.125 wt‰ of L-rGO, rGO and nanoporous rGO nanosheets loading in the EC polymer matrix, the ideal selectivity of the MMMs could reach as high as 5.74, 7.29 and 10.42 with C 3 H 6 permeability of 66.05, 76.34 and 89.95 Barrer, respectively.…”

Section: Resultsmentioning

confidence: 99%

Propylene/propane permeation properties of ethyl cellulose (EC) mixed matrix membranes fabricated by incorporation of nanoporous graphene nanosheets

Yuan

Sun

Wang

et al. 2016

Sci Rep

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Nanopore containing graphene nanosheets were synthesized by graphene oxide and a reducing agent using a facile hydrothermal treatment in sodium hydroxide media. The as-prepared nanoporous graphene was incorporated into ethyl cellulose (EC) to prepare the mixed matrix membranes (MMMs) for C3H6/C3H8 separation. Transmission electron microscopy (TEM) photograph and X-ray photoelectron spectroscopy (XPS) analysis of nanoporous graphene nanosheets indicated that the structure of nano-pore was irregular and the oxygen-containing groups in the surface were limited. More importantly, the as-prepared MMMs presented better separation performance than that of pristine EC membrane due to simultaneous enhancement of C3H6 permeability and ideal selectivity. The ideal selectivity of the MMMs with 1.125 wt‰ nanoporous graphene content for C3H6/C3H8 increased from 3.45 to 10.42 and the permeability of C3H6 increased from 57.9 Barrer to 89.95 Barrer as compared with the pristine membrane. The presumed facilitated mechanism was that the high specific surface area of nanoporous graphene in polymer matrix increased the length of the tortuous pathway formed by nanopores for the gas diffusion as compared with the pristine graphene nanosheets, and generated a rigidified interface between the EC chains and fillers, thus enhanced the diffusivity selectivity. Therefore, it is expected that nanoporous graphene would be effective material for the C3H6/C3H8 separation.

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Functionalized graphene oxide/polyimide nanocomposites as highly CO2-selective membranes

Cited by 60 publications

References 45 publications

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO₂/CH₄ separation

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO₂/CH₄ separation

Preparation of mixed matrix membranes based on polyimide and aminated graphene oxide for CO₂ separation

Propylene/propane permeation properties of ethyl cellulose (EC) mixed matrix membranes fabricated by incorporation of nanoporous graphene nanosheets

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Functionalized graphene oxide/polyimide nanocomposites as highly CO2-selective membranes

Cited by 60 publications

References 45 publications

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO2/CH4 separation

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO2/CH4 separation

Preparation of mixed matrix membranes based on polyimide and aminated graphene oxide for CO2 separation

Propylene/propane permeation properties of ethyl cellulose (EC) mixed matrix membranes fabricated by incorporation of nanoporous graphene nanosheets

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Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO₂/CH₄ separation

Fabrication and characterization of polyetherimide/polyvinyl acetate polymer blend membranes for CO₂/CH₄ separation

Preparation of mixed matrix membranes based on polyimide and aminated graphene oxide for CO₂ separation