Properties and pervaporation performance of poly(vinyl alcohol) membranes crosslinked with various dianhydrides

Xu, Sheng; Shen, Liang; Li, Cailian; Wang, Yan

doi:10.1002/app.46159

Cited by 33 publications

(33 citation statements)

References 45 publications

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“…In addition, the PVA crosslinking allows improving the mechanical properties, thermal stability, and the separation ability of the material [1,4,7,8,9]. Different crosslinking agents have been already used, such as glutaraldehyde (GA) [10,11,12,13], glyoxal [14], maleic acid [15], citric acid [16], trisodium trimetaphosphate (STMP) [17], sodium hexametaphosphate (SHMP) [17], dianhydrides [18], succinic acid (SA) [19], and sulfosuccinic acid (SSA) [19,20].…”

Section: Introductionmentioning

confidence: 99%

Chemically and Thermally Crosslinked PVA-Based Membranes: Effect on Swelling and Transport Behavior

et al. 2019

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The novel poly(vinyl alcohol) (PVA)-based membranes were prepared using the two-step crosslinking approach: the chemical crosslinking of PVA using sulfosuccinic acid (SSA) (0–50 wt.%) and the thermal treatment (120–160 °C). The membrane composition and crosslinking temperature were optimized in terms of the mechanical and transport properties. The FTIR-ATR analysis revealed that the increase of the SSA concentration and crosslinking temperature resulted in the rise of the ester bond bands intensity due to the esterification reaction between PVA and SSA. As a consequence, the PVA-based membrane with 50 wt % SSA and crosslinked at 140 °C showed the reduced Young’s modulus (from 1266.2 MPa to 1.4 MPa) and elongation at break (from 316% to 66%) in comparison with the pure PVA membrane. The studied swelling behavior of the obtained membranes revealed significantly higher water sorption than that in methanol and propal-2-ol whatever the crosslinking temperature. The performed studies provide a new way of tailoring the membrane physicochemical properties, in particular, the surface hydrophilicity. In addition, the obtained results are crucial for the design and elaboration of the polymer membranes for the pervaporative separation of the liquid-liquid mixtures, in particular, for the alcohol dehydration.

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Section: Introductionmentioning

confidence: 99%

Chemically and Thermally Crosslinked PVA-Based Membranes: Effect on Swelling and Transport Behavior

et al. 2019

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“…The transport characteristics of PVA membranes can be significantly improved using various methods of polymer modification and/or functionalization [9,11,12,13]. Among them, bulk (volume) and surface modifications are considered the most promising methods to get tailored membrane properties.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of New Pervaporation PVA Membranes for the Dehydration Using Bulk and Surface Modifications

et al. 2018

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In the present work, the novel dense and supported membranes based on polyvinyl alcohol (PVA) with improved transport properties were developed by bulk and surface modifications. Bulk modification included the blending of PVA with chitosan (CS) and the creation of a mixed-matrix membrane by introduction of fullerenol. This significantly altered the internal structure of PVA membrane, which led to an increase in permeability with high selectivity to water. Surface modification of the developed modified dense membranes, based on composites PVA-CS and PVA-fullerenol-CS, was performed through (i) making of a supported membrane with a thin selective composite layer and (ii) applying of the layer-by-layer assembly (LbL) method for coating of nano-sized polyelectrolyte (PEL) layers to increase the membrane productivity. The nature of polyelectrolyte type—(poly(allylamine hydrochloride) (PAH), poly(sodium 4-styrenesulfonate) (PSS), poly(acrylic acid) (PAA), CS), and number of PEL bilayers (2–10)—were studied. The structure of the composite membranes was investigated by FTIR, X-ray diffraction, and SEM. Transport properties were studied during the pervaporation separation of 80% isopropanol–20% water mixture. It was shown that supported membrane consisting of hybrid layer of PVA-fullerenol (5%)–chitosan (20%) with five polyelectrolyte bilayers (PSS, CS) deposited on it had the best transport properties.

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“…Excessive swelling may cause irreversible changes in the membrane, such as delamination from the support layer or defect formation. Crosslinking of PVA can be accomplished via an added functional component or post‐casting thermal, chemical, and/or radiation treatment . Common crosslinking agents include dianhydrides, dialdehydes, and multifunctional acids.…”

Section: Membrane Materials For Solvent Drying By Pv and Vpmentioning

confidence: 99%

“…Crosslinking of PVA can be accomplished via an added functional component or post-casting thermal, chemical, and/or radiation treatment. 66,73,[79][80][81][82][83] Common crosslinking agents include dianhydrides, dialdehydes, and multifunctional acids. Depending on the type of bonds formed, the crosslinks can introduce chemical stability issues.…”

Section: Organic Polymeric Materials Poly(vinyl Alcohol)mentioning

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

113

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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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Properties and pervaporation performance of poly(vinyl alcohol) membranes crosslinked with various dianhydrides

Cited by 33 publications

References 45 publications

Chemically and Thermally Crosslinked PVA-Based Membranes: Effect on Swelling and Transport Behavior

Chemically and Thermally Crosslinked PVA-Based Membranes: Effect on Swelling and Transport Behavior

Development and Characterization of New Pervaporation PVA Membranes for the Dehydration Using Bulk and Surface Modifications

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

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