Fabrication of ternary polyvinyl alcohol/tetraethyl orthosilicate/silicotungstic acid hybrid membranes for pervaporation dehydration of alcohol

Mali, Mukund G.; Walekar, Laxman S.; Mhamane, Dattakumar; Mali, Gopal; Pawar, Samadhan; Patil, Vaishali M.; Parbat, Harichandra; Gokavi, Gavisiddappa S.

doi:10.1016/j.colsurfa.2022.129741

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…In recent times, PV has assumed an increasingly prominent role in industry applications, particularly for the separation of organic–aqueous mixtures. These applications encompass the dehydration of organic solutions such as ethanol, isopropanol, − acetonitrile, and acetic acid facilitating the attainment of enhanced purity levels. , …”

Section: Introductionmentioning

confidence: 99%

“…These applications encompass the dehydration of organic solutions such as ethanol, 11 isopropanol, 12−14 acetonitrile, 15 and acetic acid 16 facilitating the attainment of enhanced purity levels. 17,18 Polymeric membranes offer distinct advantages over inorganic membranes, characterized by lower cost, expedited and simplified fabrication, and a wider array of parameters that enable effective regulation of membrane properties. 19−21 In the realm of pervaporation (PV) for dehydration applications, numerous hydrophilic polymers have been introduced as membrane materials, including polyamides, 22 polybenzimidazole (PBI), 23 sodium alginate, 24 polyacrylonitrile (PAN), 25 chitosan, 26 and poly(vinyl alcohol) (PVA).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of PVA Mixed Matrix Membrane Containing NaP Zeolite/Charcoal-Based Graphene Oxide Nanohybrid for Dehydration of Isopropanol by Pervaporation

Moghadasin,

Mohammadi,

Ahmadzadeh Tofighy

2023

Ind. Eng. Chem. Res.

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The present study reports the successful synthesis and integration of a hydrophilic NaP zeolite/charcoal-based graphene oxide (NaP/GO) nanohybrid into a carefully cross-linked poly(vinyl alcohol) (PVA) matrix. The mixed matrix membranes (MMMs) were fabricated by employing an environmentally friendly solvent for the purpose of dehydrating isopropanol through pervaporation (PV). The PV performance of the fabricated membranes was rigorously assessed, taking into account parameters such as the permeate flux, partial flux of components, separation factor, and pervaporation separation index (PSI). To achieve varying degrees of enhancement, the NaP/GO nanohybrid was skillfully incorporated into the PVA matrix at distinct concentrations of 0.1, 0.2, 0.3, 0.5, and 0.7 wt %. A meticulous comparison was then made between the performance of the fabricated MMMs and that of the pristine PVA membrane. Furthermore, comprehensive characterization of both the synthesized nanoparticles and fabricated membranes was conducted using advanced techniques such as field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and precise measurements of the degree of swelling (uptake) and water contact angle (WCA). Remarkably, at an elevated temperature of 50 °C, the MMM containing 0.5 wt % NaP/GO nanohybrid demonstrated superior performance, exhibiting an impressive separation factor of 343 and a notable permeate flux of 0.18 kg·m–2·h–1. In contrast, the neat PVA membrane displayed a separation factor of 201, indicating a significant improvement in the membrane performance, particularly with regard to the separation factor. The highly promising outcomes of this study suggest that the PVA MMM incorporating the NaP/GO nanohybrid holds great potential for application in critical processes, such as isopropanol purification. This novel nanohybrid-based membrane could pave the way for more efficient and sustainable separation technologies in various industrial sectors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of PVA Mixed Matrix Membrane Containing NaP Zeolite/Charcoal-Based Graphene Oxide Nanohybrid for Dehydration of Isopropanol by Pervaporation

Moghadasin,

Mohammadi,

Ahmadzadeh Tofighy

2023

Ind. Eng. Chem. Res.

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“…Up to this point, the possibility of using membranes made of natural polymers, synthetic polymers, biopolymers, and their chemically modified forms (doped, composites, etc.) has been examined [14]. The separation of ethanol uses a variety of membranes, including zeolites [15], microporous silica [16], and polyhedral oligomeric silsesquioxanes (POSS) [17] membranes.…”

Section: Introductionmentioning

confidence: 99%

Separation of bioethanol using in situ composite membrane of bacterial cellulose/poly (2-acrylamido-2-methylpropane sulfonic acid) (AMPS) and their characterization

Mansy

Desouky

Saleh

et al. 2023

Biomass Conv. Bioref.

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In the current study, bioethanol has been purified and separated from the culture broth using in situ modified bacterial cellulose (BC) membrane with AMPS. To our knowledge, this is the first report for development of BC composite membrane for bioethanol separation from production media. The characterization of the prepared membrane was investigated for morphology and functional groups via scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and Raman spectroscopy, in addition to the determination of their water and ethanol uptake. The obtained data proved the formation of cellulose multilayers in addition to the existence of its specific function groups. The Amicon cell pervaporation system containing the prepared BC/AMPS membrane has been used for the separation of the bioethanol from the culture broth using nitrogen gas pressure, and the results revealed that the BC/AMPS composite membrane is more efficient than the neat BC membrane in the separation process of bioethanol. At 50-psi nitrogen pressure, the best separation factor and flux were recorded as 15.43 and 98.94 g/m2.h, respectively, which were accompanied by the elevation of the bioethanol concentration from 1.98 to 3.22 mg/ml before and after separation, respectively. These findings revealed the promising application of BC/AMPS membrane in the field of bioenergy especially the bioethanol separation.

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Novel PDMS-b-PPO Membranes Modified with Graphene Oxide for Efficient Pervaporation Ethanol Dehydration

et al. 2022

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Purification and concentration of bioalcohols is gaining new status due to their use as a promising alternative liquid biofuel. In this work, novel high-performance asymmetric membranes based on a block copolymer (BCP) synthesized from polydimethylsiloxane (PDMS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) were developed for enhanced pervaporation dehydration of ethanol. Improvement in dehydration performance was achieved by obtaining BCP membranes with a “non-perforated” porous structure and through surface and bulk modifications with graphene oxide (GO). Formation of the BCP was confirmed by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies. The changes to morphology and physicochemical properties of the developed BCP and BCP/GO membranes were studied by scanning electron (SEM) and atomic force (AFM) microscopies, thermogravimetric analysis (TGA) and contact angle measurements. Transport properties of the developed membranes were evaluated by the pervaporation dehydration of ethanol over a wide concentration range (4.4–70 wt.% water) at 22 °C. The BCP (PDMS:PPO:2,4-diisocyanatotoluene = 41:58:1 wt.% composition) membrane modified with 0.7 wt.% GO demonstrated optimal transport characteristics: 80–90 g/(m2h) permeation flux with high selectivity (76.8–98.8 wt.% water in the permeate, separation factor of 72–34) and pervaporation separation index (PSI) of 5.5–2.9.

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Fabrication of ternary polyvinyl alcohol/tetraethyl orthosilicate/silicotungstic acid hybrid membranes for pervaporation dehydration of alcohol

Cited by 3 publications

References 27 publications

Synthesis and Characterization of PVA Mixed Matrix Membrane Containing NaP Zeolite/Charcoal-Based Graphene Oxide Nanohybrid for Dehydration of Isopropanol by Pervaporation

Synthesis and Characterization of PVA Mixed Matrix Membrane Containing NaP Zeolite/Charcoal-Based Graphene Oxide Nanohybrid for Dehydration of Isopropanol by Pervaporation

Separation of bioethanol using in situ composite membrane of bacterial cellulose/poly (2-acrylamido-2-methylpropane sulfonic acid) (AMPS) and their characterization

Novel PDMS-b-PPO Membranes Modified with Graphene Oxide for Efficient Pervaporation Ethanol Dehydration

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