Thermally treated ammonia functionalized graphene oxide/polyimide membranes for pervaporation dehydration of isopropanol

Salehian, Peyman; Chung, Tai‐Shung

doi:10.1016/j.memsci.2017.01.038

Cited by 64 publications

(19 citation statements)

References 51 publications

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“…Manshad et al [174] combined GO with Ultem polyetherimide for 1-butanol dehydration. Salehian and Chung [175] prepared mixed matrix membranes of ammonia-functionalised GO in a polyimide for 2-propanol dehydration.…”

Section: Applications Of Graphene and Graphene Oxidementioning

confidence: 99%

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

et al. 2019

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Pervaporation (PV), a membrane process in which the feed is a liquid mixture and the permeate is removed as a vapour, offers an energy-efficient alternative to conventional separation processes such as distillation, and can be applied to mixtures that are difficult to separate, such as azeotropes. Here the principles of pervaporation and its industrial applications are outlined. Two classes of material that show promise for use in PV membranes are described: Polymers of intrinsic microporosity (PIMs) and 2D materials such as graphene. The literature regarding PV utilizing the prototypical PIM (PIM-1) and it hydrophilic hydrolysed form (cPIM-1) is reviewed. Self-standing PIM-1 membranes give competitive results compared to other membranes reported in the literature for the separation of alcohols and other volatile organic compounds from aqueous solution, and for organic/organic separations such as methanol/ethylene glycol and dimethyl carbonate/methanol mixtures. Blends of cPIM-1 with conventional polymers improve the flux for dehydration of alcohols. The incorporation of fillers, such as functionalised graphene-like fillers, into PIM-1 to form mixed matrix membranes can enhance the separation performance. Thin film composite (TFC) membranes enable very high fluxes to be achieved when a suitable support with high surface porosity is utilised. When functionalised graphene-like fillers are introduced into the selective layer of a TFC membrane, the lateral size of the flakes needs to be carefully controlled. There is a wide range of PIMs and 2D materials yet to be explored for PV applications, which offer potential to create bespoke membranes for a wide variety of organic/aqueous and organic/organic separations.

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Section: Applications Of Graphene and Graphene Oxidementioning

confidence: 99%

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

et al. 2019

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“…In PV, a novel NCM, consisting of a cross-linkable 6FDA polyimide matrix and NH 3 functionalized GO (i.e., NHGO) particles, has been studied for dehydration of alcohol. The membrane demonstrated a water permeability of 0.198 mg m −1 h −1 KPa −1 and a water-IPA molar selectivity of 6726 which was 35 times higher than that of the pristine- co -polyimide [ 180 ]. The Zwitterionic graphene oxide was incorporated into SA for efficient water-alcohol separation [ 181 ].…”

Section: Membranes For Pv Applicationsmentioning

confidence: 99%

Polymeric Nanocomposite Membranes for Next Generation Pervaporation Process: Strategies, Challenges and Future Prospects

Roy

Singha²

2017

Membranes

102

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Pervaporation (PV) has been considered as one of the most active and promising areas in membrane technologies in separating close boiling or azeotropic liquid mixtures, heat sensitive biomaterials, water or organics from its mixtures that are indispensable constituents for various important chemical and bio-separations. In the PV process, the membrane plays the most pivotal role and is of paramount importance in governing the overall efficiency. This article evaluates and collaborates the current research towards the development of next generation nanomaterials (NMs) and embedded polymeric membranes with regard to its synthesis, fabrication and application strategies, challenges and future prospects.

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“…Aromatic heterocyclic polyimides and their composites attract a great attention during the last years as perspective membrane materials [1][2][3][4][5][6]. The presence of the polar groups and water permeability make these polymers and composites on their base the promising candidates for preparation of membranes for dehydration of different types of organic solvents [2,3,[7][8][9]. Matrimid ® is one of the commercially available amorphous polyimide that demonstrates excellent thermal stability, good mechanical properties, high glass transition temperature and superior chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Influence of Water Concentration on Its Mobility in Matrimid®

et al. 2019

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Mobility of water in polyheteroarylene (Matrimid®) was simulated at 300 K and different concentrations of water (0.5 wt.%–3 wt.%). Parameters of anomalous diffusion were calculated from molecular dynamics simulations on the base of mean square displacements of water molecules. It was found that mobility of water has nonmonotonic dependence on its concentration. Lower diffusion rates at concentrations below than 1 wt.% can be attributed to the sorption of water onto the polar groups of polymer (sorption sites). Decreasing of diffusion rate with increasing of water concentration is due to the formation of clusters of water molecules, which hampers the penetration of water between polymer chains.

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Thermally treated ammonia functionalized graphene oxide/polyimide membranes for pervaporation dehydration of isopropanol

Cited by 64 publications

References 51 publications

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

Polymeric Nanocomposite Membranes for Next Generation Pervaporation Process: Strategies, Challenges and Future Prospects

Influence of Water Concentration on Its Mobility in Matrimid®

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