Sorption and pervaporation results of clinoptilolite filled poly(vinylalcohol) membrane prepared for dehydration of aqueous organic mixtures

Salt, Yavuz; Arçevik, Ersel; Ekinci, Buket

doi:10.1002/cjce.21927

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…The difference in the swelling behavior of the PVA-SSA crosslinked membranes can be explained by the molecular size of a solvent [48]. The size of the studied solvent molecules decreases in the following order:propan-2-ol (5.12 Å) > methanol (4.10 Å) > water (3.40 Å).…”

Section: Resultsmentioning

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: Resultsmentioning

confidence: 99%

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

et al. 2019

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“…The increased hydrophilicity of MMMs and the hydrogen bonding of PVA with ligands of Zr‐MOFs favor the sorption and diffusion selectivity for water . With the further increased loading of UiO‐66 (4–6 wt%), UiO‐66‐OH (2–6 wt%) and UiO‐66‐(OH) 2 (2–6 wt%), the permeation flux declines and becomes even lower than that of pristine PVA, while the separation factor continuously rises owing to the strong interaction between Zr‐MOFs and PVA (Scheme ). Too much loading (>6 wt%) leads to a decline in both separation factor and permeation flux due to the aggregation of Zr‐MOF particles.…”

Section: Resultsmentioning

confidence: 99%

Adjustable pervaporation performance of Zr‐MOF/poly(vinyl alcohol) mixed matrix membranes

Geng

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Polymer membranes often display trade-off effects between permeation flux and separation factor in pervaporation, and exploring the strategies for breaking the effects is crucial. In this study, by altering the organic linkers (1,4-benzenedicarboxylate acid, 2-hydroxyterephthalic acid, 2,5-dihydroxyterephthalic acid and biphenyl-4,4-dicarboxylate), UiO-66, UiO-66-OH, UiO-66-(OH) 2 and UiO-67 were prepared and incorporated in poly(vinyl alcohol) (PVA) membranes for pervaporation of 90 wt% ethanol solution for the first time. RESULTS: The membrane properties and pervaporation performances were tuned, and anti-trade-off effects were demonstrated for UiO-66/PVA, UiO-66-OH/PVA and UiO-66-(OH) 2 /PVA mixed matrix membranes (MMMs). For the UiO-66-(OH) 2 /PVA MMM with 1.0 wt% loading, the permeation flux, separation factor and pervaporation separation index (PSI) were increased by 16, 14 and 32% respectively and the water permeance and selectivity were increased by 24 and 10% respectively, while the swelling degree in 90 wt% ethanol declined by 28% in comparison with that of pristine PVA membrane. CONCLUSION: The pervaporation performance of the UiO-66-(OH) 2 /PVA MMM demonstrated good potential in alcohol dehydration.

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“…The membranes were weighed, and then kept in deionized (DI) water overnight to remove the residues of the cross-linking mixture. After washing with deionized water, the membranes were dried again in an oven at 105°C for 2 h to remove the water content of the membranes [23]. There was no weight loss in the prepared membranes.…”

Section: Figurementioning

confidence: 99%

“…Pervaporation experiments for PVA and PVA-SiO2 nanocomposite membranes were carried out at 30, 40 and 50°C. The schematic representation of the pervaporation setup is given elsewhere [23]. The feed tank was kept at a constant temperature in a water bath, and the feed mixture was fed to the stainless-steel membrane cell with a peristaltic pump.…”

Section: Pervaporation Experimentsmentioning

confidence: 99%

Preparation and characterization of PVA-SiO2 nanocomposite membranes for seawater desalination by pervaporation

Tirnakci

Salt

2021

CI&CEQ

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Pervaporation is a membrane process that offers high separation performance and has an important potential for the treatment of saline water sources. In this study, poly(vinylalcohol) (PVA) and PVA-SiO2 nanocomposite membranes were prepared by the solution-casting method, and pervaporative water desalination studies were carried out for synthetic seawater (35 g L-1) at 30, 40 and 50°C. Effects of the temperatures and the incorporation of SiO2 on the pervaporation performance of polymeric nanocomposite membranes were investigated. Membranes were characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). In experiments conducted at 50°C, a permeate flux of 4.93 kgm-2 h-1 with a salt rejection of 99.3% were obtained. The highest salt rejection was 99.8% at temperature of 30°C. The results showed that the pervaporation performance of PVA membranes was remarkably enhanced with the incorporation of nano-SiO2 into polymeric matrix.

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Sorption and pervaporation results of clinoptilolite filled poly(vinylalcohol) membrane prepared for dehydration of aqueous organic mixtures

Cited by 9 publications

References 36 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

Adjustable pervaporation performance of Zr‐MOF/poly(vinyl alcohol) mixed matrix membranes

Preparation and characterization of PVA-SiO2 nanocomposite membranes for seawater desalination by pervaporation

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