Fabrication of hydrothermally reduced graphene oxide/chitosan composite membranes with a lamellar structure on methanol dehydration

Hung, Wei Song; Chang, Sue-min; Lecaros, Rumwald Leo G.; Ji, Yan; An, Quan Fu; Hu, Chien Chieh; Lee, Kueir Rarn; Lai, Juin Yih

doi:10.1016/j.carbon.2017.02.088

Cited by 72 publications

(29 citation statements)

References 58 publications

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“…As anticipated, the performance of a PVA/NaA zeolite MMM falls between that of 100% PVA and 100% NaA membranes. More recently, the emerging molecular sieving materials of CMS, MOF, and graphene have been used as the dispersed phase in water permselective MMMs …”

Section: Mixed Matrix Materialsmentioning

confidence: 99%

“…More recently, the emerging molecular sieving materials of CMS, MOF, and graphene have been used as the dispersed phase in water permselective MMMs. [278][279][280][281][282] Despite the promising performance characteristics of MMMs, they are not without limitations. As with the adage 'a chain is only as strong as its weakest link,' the most prominent weakness of a specific MMM is generally that of either of the materials.…”

Section: Mixed Matrix Materialsmentioning

confidence: 99%

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Review: membrane materials for the removal of water from industrial solvents by pervaporation and vapor permeation

Vane

2018

J of Chemical Tech & Biotech

108

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Organic solvents are widely used in a variety of industrial sectors. Reclaiming and reusing the solvents may be the most economically and environmentally beneficial option for managing spent solvents. Purifying the solvents to meet reuse specifications can be challenging. For hydrophilic solvents, water must be removed prior to reuse, yet many hydrophilic solvents form hard‐to‐separate azeotropic mixtures with water. Such mixtures make separation processes energy‐intensive and cause economic challenges. The membrane processes pervaporation (PV) and vapor permeation (VP) can be less energy‐intensive than distillation‐based processes and have proven to be very effective in removing water from azeotropic mixtures. In PV/VP, separation is based on the solution–diffusion interaction between the dense permselective layer of the membrane and the solvent/water mixture. This review provides a state‐of‐the‐science analysis of materials used as the selective layer(s) of PV/VP membranes in removing water from organic solvents. A variety of membrane materials, such as polymeric, inorganic, mixed matrix, and hybrid, have been reported in the literature. A small subset of these is commercially available and highlighted here: poly (vinyl alcohol), polyimides, amorphous perfluoro polymers, NaA zeolites, chabazite zeolites, T‐type zeolites, and hybrid silicas. The typical performance characteristics and operating limits of these membranes are discussed. Solvents targeted by the United States Environmental Protection Agency for reclamation are emphasized and ten common solvents are chosen for analysis: acetonitrile, 1‐butanol, N,N‐dimethyl formamide, ethanol, methanol, methyl isobutyl ketone, methyl tert‐butyl ether, tetrahydrofuran, acetone, and 2‐propanol. Published 2018. This article is a U.S. Government work and is in the public domain in the USA.

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Section: Mixed Matrix Materialsmentioning

confidence: 99%

Section: Mixed Matrix Materialsmentioning

confidence: 99%

Review: membrane materials for the removal of water from industrial solvents by pervaporation and vapor permeation

Vane

2018

J of Chemical Tech & Biotech

108

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“…Lin et al [172] investigated GO/chitosan membranes for pervaporationassisted esterification. GO and rGO/chitosan membranes were studied by Hung et al [173] for methanol dehydration. Manshad et al [174] combined GO with Ultem polyetherimide for 1-butanol 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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“…Expectedly, the amine groups in CS polymer chains would react with carboxyl groups attached onto GO nanosheets to form amide groups. 19,20,22 XPS is conducted to characterize the variation of functional groups in GO and GO/CS lms before and aer alkali treatment as shown in Fig. 1b, c and Table S1.…”

Section: Structural and Interfacial Characteristics Of Go-based Lmsmentioning

confidence: 99%

Engineering the interface in mechanically responsive graphene-based films

et al. 2018

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Fabrication of hydrothermally reduced graphene oxide/chitosan composite membranes with a lamellar structure on methanol dehydration

Cited by 72 publications

References 58 publications

Review: membrane materials for the removal of water from industrial solvents by pervaporation and vapor permeation

Review: membrane materials for the removal of water from industrial solvents by pervaporation and vapor permeation

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

Engineering the interface in mechanically responsive graphene-based films

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