Poly(Vinyl Alcohol)/Graphene Oxide Mixed Matrix Membranes for Pervaporation of Toluene and Isooctane

Khazaei, Ali; Mohebbi, Vahid; Behbahani, Reza Mosayebi; Ramazani, S A Ahmad

doi:10.1080/03602559.2016.1275682

Cited by 15 publications

(3 citation statements)

References 18 publications

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“…The embedding of porous nanostructured fillers in a continuous polymer phase is a powerful strategy for the realization of engineered systems with applications in the environmental and energy fields. Recently, this approach has been successfully exploited by the realization, for instance, of mixed matrix membranes (MMMs) for water purification (ultrafiltration, reverse osmosis, nanofiltration) and for liquid–liquid and gas separations, , with improved performances in terms of efficiency and antifouling properties. MMMs are obtained by the dispersion and the embedding of a microporous phase in a continuous polymer phase, and their final performances derive from the synergistic combination of the properties of their constituting materials .…”

Section: Resultsmentioning

confidence: 99%

A Versatile Synthetic Approach toward Hyper-Cross-Linked Styrene-Based Polymers and Nanocomposites

et al. 2017

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We describe a new synthetic approach for the realization of hyper-cross-linked (HCL) styrene resins, based on the bulk prepolymerization of a gel-type precursor followed\ud by a traditional Friedel−Crafts alkylation step. The obtained HCL materials show comparable properties with respect to the corresponding resins obtained by typical suspension prepolymerization. The versatility of the proposed process is demonstrated through the realization of two innovative classes of advanced materials, i.e., HCL microporous organic polymer\ud nanocomposites (MOPNs) and polymer membranes containing HCL fillers, which both represent very promising strategies toward wide and successful application of Davankov-type\ud materials for gas separation and storage and for water remediatio

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Section: Resultsmentioning

confidence: 99%

A Versatile Synthetic Approach toward Hyper-Cross-Linked Styrene-Based Polymers and Nanocomposites

et al. 2017

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“…Wang et al [178] created "pore-filling" composite membranes with a separation layer of GO in poly (vinyl alcohol) (PVA), both on the surface and in the pores of an asymmetric PAN support, and used them for the separation of a toluene/ heptane mixture, the addition of GO improving the separation of the aromatic component. Khazaei et al [179,180] studied GO/PVA mixed matrix membranes for the separation of toluene from its mixtures with iso-octane. Maya et al [181] incorporated reduced graphene oxide (rGO) into polychloroprene membranes for the pervaporation of chloroform/acetone azeotropic liquid mixtures.…”

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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“…The advent of organic–inorganic hybrid materials, blending the high permeability of inorganic substances with the hydrophobicity of organic materials, has led to the creation of composite selective layers that enhance the separation performance of PV membranes. Various inorganic particles, including zeolitic imidazolate frameworks (ZIFs), , zeolites, , silica, , and graphene, , have been incorporated into the polymer matrix, demonstrating improved separation performance in these hybrid membranes with the addition of inorganic particles. Therefore, enhancing the separation factor of PDMDES membranes by incorporating hydrophobic inorganic particles into their matrixes can be a promising strategy.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Pervaporation Performance for Alcohol Recovery from Aqueous Solutions with Silicalite-1/Polydimethyldiethoxysilane (PDMDES) Nanocomposite Membranes

Chen,

Li,

et al. 2023

Ind. Eng. Chem. Res.

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This study presented a newly prepared silicalite-1/ polydimethyldiethoxysilane (PDMDES) nanocomposite membrane through the incorporation of nanosized silicalite-1 particles to enhance the pervaporation performance for alcohol recovery from aqueous solutions. Preheating was strategically employed to facilitate the formation of chemical bonds between silicalite-1 and the cross-linking agent vinyltriethoxysilane (VTES), thereby improving the compatibility between silicalite-1 and the PDMDES polymer. Comprehensive characterizations including FT-IR, XRD, TGA, and CA demonstrated a notable increase in hydrophobicity and thermal stability, attributable to the well-incorporated silicalite-1 nanoparticles. FE-SEM observation revealed two distinct cross-sectional morphologies of the nanocomposite membrane: a dense packed structure with uniformly dispersed silicalite-1 nanoparticles within the PDMDES polymer matrix and a loosely accumulated structure where silicalite-1 was adhered by the PDMDES polymer. This phenomenon was linked to the low viscosity of PDMDES during the membrane preparation, which also resulted in the actual loading of silicalite-1 in the prepared nanocomposite membranes being higher than the intended one. The separation performance, influenced by silicalite-1 loading, operating temperature, and feed concentration, was thoroughly evaluated. Accordingly, the separation factor was enhanced by 90% compared to pure PDMDES membrane, and the optimal pervaporation performance was achieved with a 10 wt % silicalite-1 loading in the nanocomposite membrane, manifesting a high total flux of 5.72 kg m −2 h −1 , a PSI of 31.36 kg m −2 h −1 , and an ethanol permeability of 184.3 × 10 −6 mol m −1 h −1 kPa −1 , when separating ethanol from 5 wt % ethanol/water solution at 40 °C. Based on the experimental findings, lower feed concentration and operating temperature were suggested in the applications of the silicalite-1/PDMDES nanocomposite membranes for efficient alcohol recovery from aqueous solution.■ HIGHLIGHTS 1. Innovative preparation of silicalite-1/PDMDES nanocomposite membranes for efficient alcohol recovery from aqueous solutions. 2. Preheating strategy utilized to enhance compatibility between silicalite-1 and PDMDES in membrane preparation. 3. Breakthrough in trade-off balances: the silicalite-1/ PDMDES nanocomposite membrane surpasses pristine PDMDES membrane in separation performance, with 90% enhancement in separation factor and more than 9.6% enhancement in total flux. 4. Low-viscosity PDMDES limits the maximum silicalite-1 loading of 10 wt % and results in exceeding designed silicalite-1 loading in membranes. 5. Exceptional separation performance: the silicalite-1/ PDMDES nanocomposite membrane achieves a high flux of 5.72 kg m −2 h −1 and a PSI of 31.36 kg m −2 h −1 in ethanol recovery.

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Poly(Vinyl Alcohol)/Graphene Oxide Mixed Matrix Membranes for Pervaporation of Toluene and Isooctane

Cited by 15 publications

References 18 publications

A Versatile Synthetic Approach toward Hyper-Cross-Linked Styrene-Based Polymers and Nanocomposites

A Versatile Synthetic Approach toward Hyper-Cross-Linked Styrene-Based Polymers and Nanocomposites

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

Enhancing Pervaporation Performance for Alcohol Recovery from Aqueous Solutions with Silicalite-1/Polydimethyldiethoxysilane (PDMDES) Nanocomposite Membranes

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