Preparation and characterization of B2SA grafted hybrid poly(vinyl alcohol) membranes for pervaporation separation of water-isopropanol mixtures

Kulkarni, A. S.; Badi, Sonal M.; Sajjan, Ashok M.; Banapurmath, N. R.; Shettar, Ashok

doi:10.1016/j.cdc.2019.100245

Cited by 13 publications

(14 citation statements)

References 39 publications

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“…The peak around 1710 cm −1 corresponding to –CHO group of B2SA was missing in the spectra, which conformed to the reaction between B2SA and PVA. Moreover, the peak that appeared due to the acetate groups in PVA almost disappeared in M-B2SA and graphene-incorporated membranes, suggesting the acid hydrolysis reaction [ 19 ]. Further, the broad intensity peak appearing at 3318 cm −1 was enhanced systematically, which was due to the presence O–H groups of water molecules present in the channels created due to the adhesion (Van der Waals force of attraction) between the graphene and the silane group of TEOS.…”

Section: Resultsmentioning

confidence: 99%

“…A fully dried membrane was then peeled off and named as M. B2SA-grafted hybrid PVA membrane was prepared by mixing a known quantity of B2SA (7.5 mass%) to the above-prepared solution and stirred for 1 day at 60 °C. The remaining procedure followed was similar to the procedure followed for the hybrid PVA membrane preparation and subsequently the prepared membrane was named as M-B2SA [ 19 ]. With the intention of studying the effect of graphene on pervaporation performance of sulfonated PVA–TEOS hybrid membranes, known amounts (0.5%, 1%, 1.5%, and 2%) of different mass% of graphene were added with respect to PVA and stirred for 4 h, being kept in a sonicator for 30 min to obtain a uniform suspension.…”

Section: Methodsmentioning

confidence: 99%

“…Among all the hydrophilic materials, poly(vinyl alcohol) (PVA) is considered to be promising because of its cost-effectiveness, hydrophilicity, and excellent membrane-forming properties [ 14 , 15 , 16 , 17 , 18 ]. However, the PVA membrane suffers from excessive swelling, which leads to poor pervaporation efficiency; to overcome this, many modification techniques such as grafting, crosslinking, blending, as well as the addition of nanomaterials are employed to strengthen the membrane and solve the problem of excessive swelling [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and Physicochemical Study of B2SA-Grafted Poly(vinyl Alcohol)–Graphene Hybrid Membranes for Dehydration of Bioethanol by Pervaporation

et al. 2021

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Tetraethylorthosilicate (TEOS)-crosslinked poly(vinyl alcohol) (PVA) solution was prepared and treated with benzaldehyde 2 sulphonic sodium salt acid (B2SA) for sulfonation. Different contents of graphene were incorporated into B2SA-grafted PVA–TEOS hybrid membrane to improve the membrane stability, mechanical strength, and overall pervaporation performance of the membranes. Membranes were fabricated using the casting technique. Developed membranes were then analyzed for their physicochemical changes by means of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), scanning electron microscope (SEM), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA), contact angle analysis (CA), and mechanical strength. The lower d-spacing value observed in WAXD was evidence for the decreased inter-chain distance between the polymer chains. DSC exhibited the enhanced thermal stability of the developed membranes compared to the plane PVA membrane with enhancement in Tg value (106 °C), which was well above the pervaporation experimental temperature. Incorporation of graphene induced higher mechanical strength to the fabricated membranes. Further, the membranes were tested for the pervaporation separation of bioethanol. All the membranes were stable throughout the pervaporation studies, with M-2 G showing the total permeation flux of 11.66 × 10−2 kg/(m2 h) at 30 °C.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication and Physicochemical Study of B2SA-Grafted Poly(vinyl Alcohol)–Graphene Hybrid Membranes for Dehydration of Bioethanol by Pervaporation

et al. 2021

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“…The first mass loss was detected between 200 and 350°C whereas the second mass loss was revealed between 350 and 550°C. First stage mass loss can be attributed to the decomposition of OH side chain of the PVA leading to the formation of polyene structure 33–36 . Second‐stage mass loss may be due to the decomposition of main PVA chains via degradation of the polyene chains 35,36 .…”

Section: Resultsmentioning

confidence: 99%

Pervaporation performance of poly(vinyl alcohol)‐graft‐poly(N‐hydroxymethyl acrylamide) membranes for dehydration of isopropyl alcohol‐water mixture

Baysak

Işıklan

2021

J of Applied Polymer Sci

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In the present work, poly(N‐hydroxymethyl acrylamide) grafted poly(vinyl alcohol) (PVA‐g‐PNHMA) membranes were developed for the dehydration of isopropyl alcohol (IPA) by the use of pervaporation method. The PVA‐g‐PNHMA membranes have been synthesized and their chemical composition and morphology have been characterized by Fourier transform infrared spectroscopy, 13C‐nuclear magnetic resonance spectroscopy, X‐ray diffractometry, differential scanning calorimetry, thermogravimetric analysis, and field emission scanning electron microscopy. The impacts of numerous factors such as temperature, feed concentration as well as membrane thickness on their pervaporation performance were investigated and the optimal conditions were found. With the increase in the grafting percentage of the PVA‐g‐PNHMA membrane, both flux and separation factor also increase. The PVA‐g‐PNHMA membrane with a grafting percentage of 34% revealed the best separation factor of 362 with a flux of 0.0085 kg/m2.h for 12.6% mass of water in the feed solution. It has also been found that swelling behaviors of the membranes are consistent with all pervaporation results. Besides, permeation and diffusion activation energies were determined as 23.69 and 29.21 kJ/mol from the change of permeation flux with temperature. Based on the obtained outcomes, it is obvious that PVA‐g‐PNHMA membranes are quite efficient in the separation of IPA/water mixture via pervaporation.

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“…López-Maldonado et al have done extensive work on the removal of hazardous metal ions and heavy metals from water using many natural substances and polymers [6][7][8][9]. Among these, pervaporation has identified itself as an important separation technique as it separates several close boiling (azeotropic) liquids, including organic-water and organic-organic liquids [10]. In pervaporation, the separation performance depends on several factors, but one of the most vital factors is the membrane.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Biocompatible Membranes from Natural Chitosan and Gelatin for Pervaporative Separation of Water–Isopropanol Mixture

et al. 2021

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Natural polymers have attracted a lot of interest in researchers of late as they are environmentally friendly, biocompatible, and possess excellent characters. Membranes forming natural polymers have provided a whole new dimension to the separation technology. In this work, chitosan-gelatin blend membranes were fabricated using chitosan as the base and varying the amount of gelatin. Transport, mechanical, and surface characteristics of the fabricated membranes were examined in detail by means of the characterizing techniques such as Fourier transform infrared spectroscopy, differential scanning colorimetry, wide angle X-ray diffraction, scanning electron microscope, and thermogravimetric analysis. In order to analyze the water affinity of the developed blend chitosan-gelatin membranes, the percentage degree of swelling was examined. Out of the fabricated membranes, the membrane loaded with 15 mass% of gelatin exhibited the better pervaporation performance with a pervaporation separation index value of 266 at 30 °C for the solution containing 10% in terms of the mass of water, which is the highest among the contemporary membranes. All the fabricated membranes were stable during the pervaporation experiments, and permeation flux of water for the fabricated membranes was dominant in the overall total permeation flux, signifying that the developed membranes could be chosen for efficient separation of water–isopropanol mixture on a larger scale.

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Preparation and characterization of B2SA grafted hybrid poly(vinyl alcohol) membranes for pervaporation separation of water-isopropanol mixtures

Cited by 13 publications

References 39 publications

Fabrication and Physicochemical Study of B2SA-Grafted Poly(vinyl Alcohol)–Graphene Hybrid Membranes for Dehydration of Bioethanol by Pervaporation

Fabrication and Physicochemical Study of B2SA-Grafted Poly(vinyl Alcohol)–Graphene Hybrid Membranes for Dehydration of Bioethanol by Pervaporation

Pervaporation performance of poly(vinyl alcohol)‐graft‐poly(N‐hydroxymethyl acrylamide) membranes for dehydration of isopropyl alcohol‐water mixture

Development and Characterization of Biocompatible Membranes from Natural Chitosan and Gelatin for Pervaporative Separation of Water–Isopropanol Mixture

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