Pebax-based composite membranes with high gas transport properties enhanced by ionic liquids for CO<sub>2</sub> separation

Li, Mengdie; Zhang, Xiangping; Bai, Lu; Gao, Hongshuai; Deng, Jing; Yang, Qingyuan; Zhang, Suojiang

doi:10.1039/c6ra27221e

Cited by 108 publications

(71 citation statements)

References 44 publications

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“…Comparing FTIR spectrum of Pebax‐HNT2 mixed matrix membrane with spectra of HNT powder and Pebax, no new peaks appeared other than those of HNT and Pebax in the spectra of the mixed matrix membrane, indicating that no new chemical interaction took place when HNT was added to Pebax. Therefore, the interaction is primarily physical as confirmed by Li et al . The reason for the low intensity of, even lack of, O─H band at 3621 and 3694 cm −1 in mixed matrix membrane is most probably due to well dispersion and low loading of halloysite in the matrix and not because of the interactions between the Pebax chains and HNT …”

Section: Resultsmentioning

confidence: 73%

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

Afshoun

Chenar

Moradi

et al. 2019

J of Applied Polymer Sci

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Enhancing the performance of gas separation membranes is one of the major concerns of membrane researchers. Thus, in this study, poly(ether-block-amide) (Pebax)/polyetherimide (PEI) thin-film composite membranes were prepared and their CO 2 /CH 4 gas separation performance was investigated by means of pure and mixed gases permeation tests. To improve the properties of these membranes, halloysite nanotubes (HNT) were added to Pebax layer at different loadings of 0.5, 1, 2, and 5 wt % to form Pebax-HNT/PEI membranes. Scanning electron microscopy, gas sorption, X-ray diffraction, Fourier-transform infrared, and differential scanning calorimetry tests were also performed to investigate the impact of HNT on structure and properties of prepared membranes. Results showed that both CO 2 /CH 4 selectivity and CO 2 permeance increased by adding HNT to Pebax layer up to 2 wt %. By increasing HNT loading to 5 wt %, the CO 2 /CH 4 selectivity decreased from 32 to 18, while CO 2 permeance increased from 3.25 to 4.2 GPU. Pebax/PEI and Pebax-HNT/PEI membranes containing 2 wt % of HNT were tested using CO 2 / CH 4 gas mixtures at different feed CO 2 concentrations and feed pressure of 4 bar. The results showed that with increasing CO 2 concentration from 20 to 80 vol %, CO 2 /CH 4 selectivity of Pebax/PEI composite membranes increased by 19%, while, in Pebax-HNT/PEI membrane, CO 2 / CH 4 selectivity decreased by 40%.

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Section: Resultsmentioning

confidence: 73%

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

Afshoun

Chenar

Moradi

et al. 2019

J of Applied Polymer Sci

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“…As mentioned before, PEPA is a semicrystalline copolymer that composed of crystal PA-6 and amorphous PEO segments. As displayed in XRD results ( Figure 6B), an intensive crystallization peak notes in the XRD pattern of virgin PEBA in the scope from 14 • to 27 • , related to the hydrogen bonding between PA-6 chains (larger crystalline region) [48,49]. Also, no other characteristics were noted when PL was added to "PEBA1", which means that crystallinity of virgin membrane was not affected by PL added to "PEBA1".…”

Section: Chemical Composition Of the Synthesized Membranesmentioning

confidence: 81%

A New Industrial Technology for Mass Production of Graphene/PEBA Membranes for CO2/CH4 Selectivity with High Dispersion, Thermal and Mechanical Performance

et al. 2020

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Polyether block amide (PEBA) nanocomposite membranes, including Graphene (GA)/PEBA membranes are considered to be a promising emerging technology for removing CO2 from natural gas and biogas. However, poor dispersion of GA in the produced membranes at industrial scale still forms the main barrier to commercialize. Within this frame, this research aims to develop a new industrial approach to produce GA/PEBA granules that could be used as a feedstock material for mass production of GA/PEBA membranes. The developed approach consists of three sequential phases. The first stage was concentrated on production of GA/PEBA granules using extrusion process (at 170–210 °C, depending on GA concentration) in the presence of Paraffin Liquid (PL) as an adhesive layer (between GA and PEBA) and assisted melting of PEBA. The second phase was devoted to production of GA/PEBA membranes using a solution casting method. The last phase was focused on evaluation of CO2/CH4 selectivity of the fabricated membranes at low and high temperatures (25 and 55 °C) at a constant feeding pressure (2 bar) using a test rig built especially for that purpose. The granules and membranes were prepared with different concentrations of GA in the range 0.05 to 0.5 wt.% and constant amount of PL (2 wt.%). Also, the morphology, physical, chemical, thermal, and mechanical behaviors of the synthesized membranes were analyzed with the help of SEM, TEM, XRD, FTIR, TGA-DTG, and universal testing machine. The results showed that incorporation of GA with PEBA using the developed approach resulted in significant improvements in dispersion, thermal, and mechanical properties (higher elasticity increased by ~10%). Also, ideal CO2/CH4 selectivity was improved by 29% at 25 °C and 32% at 55 °C.

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“…Owing to the good adhesion of the small ZIF‐8 particles to the continuous matrix of IL‐CS, which improved the interface compatibility between the nanoparticles and the polymer, the gas separation performance was improved. Li et al . performed a gas permeation test of [bmim][NTf 2 ]/Pebax/ZIF‐8 MMMs.…”

Section: Modified‐zif‐based Mixed Matrix Membranesmentioning

confidence: 99%

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO₂ separation: A review

Guan

Dai

Dong

et al. 2020

J of Applied Polymer Sci

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Mixed matrix membranes (MMMs), which combine the good separation performance of inorganic materials with the low cost of polymers, have emerged as a research hotspot for gas separation membranes. Zeolite imidazolate frameworks (ZIFs) are widely used as fillers to prepare MMMs owing to their advantageous characteristics, such as adjustable pore channels, unsaturated sites, and easy functionalization. For MMMs, three directions can be employed as criteria for improvement compared with pristine polymeric membranes. In this article, the progress of ZIF-based MMMs is reviewed from the aspects of sole-ZIF-based MMMs and modified ZIFbased MMMs. Both strategies improve the separation performance through different improvement directions and mechanisms. Our analysis shows that the synergistic effect of the modified filler can change the structure of the membranes, such as by improving the filler-polymer interface voids, which provides a foundation to overcome the trade-off effect to a certain extent.

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Pebax-based composite membranes with high gas transport properties enhanced by ionic liquids for CO₂ separation

Abstract: A series of composite membranes with high gas transport properties enhanced by IL and ZIF-8 have been developed. The influence of ionic liquid and ZIF-8 addition on gas separation performance were systematically investigated.

Cited by 108 publications

References 44 publications

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

A New Industrial Technology for Mass Production of Graphene/PEBA Membranes for CO2/CH4 Selectivity with High Dispersion, Thermal and Mechanical Performance

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO₂ separation: A review

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Pebax-based composite membranes with high gas transport properties enhanced by ionic liquids for CO2 separation

Abstract: A series of composite membranes with high gas transport properties enhanced by IL and ZIF-8 have been developed. The influence of ionic liquid and ZIF-8 addition on gas separation performance were systematically investigated.

Cited by 108 publications

References 44 publications

Effects of halloysite nanotubes on the morphology and CO2/CH4 separation performance of Pebax/polyetherimide thin‐film composite membranes

Effects of halloysite nanotubes on the morphology and CO2/CH4 separation performance of Pebax/polyetherimide thin‐film composite membranes

A New Industrial Technology for Mass Production of Graphene/PEBA Membranes for CO2/CH4 Selectivity with High Dispersion, Thermal and Mechanical Performance

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO2 separation: A review

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Pebax-based composite membranes with high gas transport properties enhanced by ionic liquids for CO₂ separation

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO₂ separation: A review