Surfactant-modified graphene oxide membranes with tunable structure for gas separation

Ma, Shenglin; Tang, Zheng Ting; Fan, Yiyi; Zhao, Jinping; Meng, Xiuxia; Yang, Naitao; Zhuo, Shuping; Liu, Shaomin

doi:10.1016/j.carbon.2019.06.006

Cited by 28 publications

(9 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The prepared PDMS/PEI composite hollow fiber membranes followed the trade-off relationship between permeance and selectivity [ 26 ]. To enhance the gas-separation performance by increasing the gas permeance and selectivity simultaneously, 2D nanomaterials, such as surface-modified graphene oxide (GO) containing CO 2 -philic functional groups [ 61 , 62 , 63 ] and nitrogen-doped graphene nanosheets [ 64 , 65 ], will be incorporated in the selective coating layer in the further works. Moreover, the conditions for the preparation of mixed matrix hollow fiber membranes [ 66 ] will be optimized by using chemometric methods [ 67 ].…”

Section: Discussionmentioning

confidence: 99%

Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

Knozowska

Kujawa

et al. 2021

Polymers

View full text Add to dashboard Cite

The development of thin layer on hollow-fiber substrate has drawn great attention in the gas-separation process. In this work, polydimethysiloxane (PDMS)/polyetherimide (PEI) hollow-fiber membranes were prepared by using the dip-coating method. The prepared membranes were characterized by Scanning Electron Microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), and gas permeance measurements. The concentration of PDMS solution and coating time revealed an important influence on the gas permeance and the thickness of the PDMS layer. It was confirmed from the SEM and EDX results that the PDMS layer’s thickness and the atomic content of silicon in the selective layer increased with the growth in coating time and the concentration of PDMS solution. The composite hollow-fiber membrane prepared from 15 wt% PDMS solution at 10 min coating time showed the best gas-separation performance with CO2 permeance of 51 GPU and CO2/N2 ideal selectivity of 21.

show abstract

Section: Discussionmentioning

confidence: 99%

Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

Knozowska

Kujawa

et al. 2021

Polymers

View full text Add to dashboard Cite

show abstract

“…It was assumed to be due to the entry of SDBS into the GO layer. The interlayer-spacing distance of GO would be enlarged after being intercalated by SDBS. , The ions could be transferred more easily and faster between large channels. , Therefore, the value of the resistance R GP was lower than that before fouling. The results of EIS analyses showed that the GO@PDA modifying layer can effectively block SDBS foulants from entering the membrane matrix and resist the deposition of SDBS to form a dense foulants layer on the surface of GO@PDA-M.…”

Section: Resultsmentioning

confidence: 99%

“…The interlayer-spacing distance of GO would be enlarged after being intercalated by SDBS. 37,38 The ions could be transferred more easily and faster between large channels. 39,40 Therefore, the value of the resistance R GP was lower than that before fouling.…”

Section: Membrane Fouling Characterization By Eismentioning

confidence: 99%

Anion Exchange Nanocomposite Membranes Modified with Graphene Oxide and Polydopamine: Interfacial Structure and Antifouling Applications

Shi

Cao

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

In this work, electrochemical impedance spectroscopy (EIS) was utilized to probe interfacial structures of antifouling anion exchange membranes (AEMs) with different modifying architectures fabricated by graphene oxide (GO) and polydopamine (PDA). Results showed that the GO@PDA modified AEMs with a compact GO@PDA layer exhibited a new interface between the modifying layer and membrane matrix, different from the loose GO-modified AEMs. After fouling experiments, from quantifying electrical equivalent circuits fitted to EIS results, it could be found that GO-modified AEMs and PDA-modified AEMs exhibited a significant foulants layer, although the modifying layer reduced the amount of foulants absorbed in the membrane matrix. For GO@PDA-modified AEMs, the increase in ohmic resistance and the foulants layer was almost negligible. Only a small amount of foulants accumulating on the GO@PDA layer affected the capacitive resistance of the interfacial layer obviously. It was concluded that the electrochemical properties and interface of modified AEMs was influenced by the structure of modifying layer, and a dense and compact modifying layer could be more effective to block the foulants from depositing on the surface of AEMs and entering the membrane matrix. The electrochemical characterizations helped to elucidate the antifouling mechanism of modified AEMs with different structures and get a good understanding of the correlation among the properties, structures, and antifouling performance of the modifying layer.

show abstract

“…In this context, a dip coating by soaking hollow fiber membrane supports into a GO dispersion has been tried, with the lumen side being connected to a mild vacuum to mimic the vacuum filtration method, as in flat sheet membrane fabrication. Such an approach is often termed as the vacuum suction method [ 86 , 88 , 91 , 97 , 99 ]. Nevertheless, the optimization of selective layer thickness is known to be difficult, since an increase in the GO coating time may not result in a linear increase in the thickness of GO laminates.…”

Section: Performance Of a Graphene-based Membranementioning

confidence: 99%

Graphene-based Membranes for H2 Separation: Recent Progress and Future Perspective

2020

View full text Add to dashboard Cite

Hydrogen (H2) is an industrial gas that has showcased its importance in several well-known processes such as ammonia, methanol and steel productions, as well as in petrochemical industries. Besides, there is a growing interest in H2 production and purification owing to the global efforts to minimize the emission of greenhouse gases. Nevertheless, H2 which is produced synthetically is expected to contain other impurities and unreacted substituents (e.g., carbon dioxide, CO2; nitrogen, N2 and methane, CH4), such that subsequent purification steps are typically required for practical applications. In this context, membrane-based separation has attracted a vast amount of interest due to its desirable advantages over conventional separation processes, such as the ease of operation, low energy consumption and small plant footprint. Efforts have also been made for the development of high-performance membranes that can overcome the limitations of conventional polymer membranes. In particular, the studies on graphene-based membranes have been actively conducted most recently, showcasing outstanding H2-separation performances. This review focuses on the recent progress and potential challenges in graphene-based membranes for H2 purification.

show abstract

Surfactant-modified graphene oxide membranes with tunable structure for gas separation

Cited by 28 publications

References 66 publications

Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

Anion Exchange Nanocomposite Membranes Modified with Graphene Oxide and Polydopamine: Interfacial Structure and Antifouling Applications

Graphene-based Membranes for H2 Separation: Recent Progress and Future Perspective

Contact Info

Product

Resources

About