Strongly Selective Polymer Membranes Modified with Heteroarm Stars for the Ethylene Glycol Dehydration by Pervaporation

Rostovtseva, Valeriia; Pulyalina, Alexandra; Rudakova, Daria; Виноградова, Л. В.; Polotskaya, G. A.

doi:10.3390/membranes10050086

Cited by 13 publications

(12 citation statements)

References 46 publications

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“…Due to the ease of movement of phenyl rings and large free volume between the polymer chains, this polymer is actively used as a membrane material for diffusion membrane processesgas separation [15][16][17] and pervaporation [18][19][20][21][22]. However, in spite of its potential, PPO was investigated only in a few studies which addressed the pervaporation regeneration of EG from water [23] and methanol [24,25]. For the separation of EG/water mixtures, the improvement of PPO membranes was achieved by the modification with heteroarm stars (HAS), consisting of a center fullerene C 60 , six arms of nonpolar polystyrene, and six arms of polar poly-tert-butyl methacrylate [23].…”

Section: Introductionmentioning

confidence: 99%

“…However, in spite of its potential, PPO was investigated only in a few studies which addressed the pervaporation regeneration of EG from water [23] and methanol [24,25]. For the separation of EG/water mixtures, the improvement of PPO membranes was achieved by the modification with heteroarm stars (HAS), consisting of a center fullerene C 60 , six arms of nonpolar polystyrene, and six arms of polar poly-tert-butyl methacrylate [23]. A dense PPO/HAS (5 wt.%) membrane with the thickness of ca.…”

Section: Introductionmentioning

confidence: 99%

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Novel Mixed Matrix Membranes Based on Polyphenylene Oxide Modified with Graphene Oxide for Enhanced Pervaporation Dehydration of Ethylene Glycol

et al. 2022

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Ethylene glycol (EG) is widely used in various economic and industrial fields. The demand for its efficient separation and recovery from water is constantly growing. To improve the pervaporation characteristics of a poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) membrane in dehydration of ethylene glycol, the modification with graphene oxide (GO) nanoparticles was used. The effects of the introduction of various GO quantities into the PPO matrix on the structure and physicochemical properties were studied by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies, scanning electron (SEM) and atomic force (AFM) microscopies, thermogravimetric analysis (TGA), swelling experiments, and contact angle measurements. Two types of membranes based on PPO and PPO/GO composite were developed: dense membranes and supported membranes on a fluoroplast substrate (MFFC). Transport properties of the developed membranes were evaluated in the pervaporation dehydration of EG in a wide concentration range (10–90 wt.% and 10–30 wt.% water for the dense and supported membranes, respectively). The supported PPO/GO(0.7%)/MFFC membrane demonstrated the best transport properties in pervaporation dehydration of EG (10–30 wt.% water) at 22 °C: permeation flux ca. 15 times higher compared to dense PPO membrane—180–230 g/(m2·h)), 99.8–99.6 wt.% water in the permeate. The membrane is suitable for the promising industrial application.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Mixed Matrix Membranes Based on Polyphenylene Oxide Modified with Graphene Oxide for Enhanced Pervaporation Dehydration of Ethylene Glycol

et al. 2022

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“…HSM are the twelve-arm stars with six polystyrene arms and six arms of a diblock copolymer poly-2-vinylpyridine- block -poly- tert -butylmethacrylate covalently attached to the common fullerene (C 60 ) core and IL is 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][Tf 2 N]). In the previous works, we have presented a comprehensive study of the hybrid membranes containing star macromolecules with a fullerene (C 60 ) branching center and 12 arms of different nature, which showed increased separation properties in the pervaporation of aqueous organic and organic mixtures [ 38 , 39 , 40 , 41 ]. Poly(2, 6-dimethyl-1, 4-phenylene oxide) (PPO) has been used as a polymer matrix and proved itself as a membrane material with good operational properties [ 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Pervaporation Membrane Selectivity by Incorporating Star Macromolecules Modified with Ionic Liquid for Intensification of Lactic Acid Dehydration

et al. 2021

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Modification of polymer matrix by hybrid fillers is a promising way to produce membranes with excellent separation efficiency due to variations in membrane structure. High-performance membranes for the pervaporation dehydration were produced by modifying poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) to facilitate lactic acid purification. Ionic liquid (IL), heteroarm star macromolecules (HSM), and their combination (IL:HSM) were employed as additives to the polymer matrix. The composition and structure of hybrid membranes were characterized by X-ray diffraction and FTIR spectroscopy. Scanning electron microscopy was used to investigate the membranes surface and cross-section morphology. It was established that the inclusion of modifiers in the polymer matrix leads to the change of membrane structure. The influence of IL:HSM was also studied via sorption experiments and pervaporation of water‒lactic acid mixtures. Lactic acid is an essential compound in many industries, including food, pharmaceutical, chemical, while the recovering and purifying account for approximately 50% of its production cost. It was found that the membranes selectively remove water from the feed. Quantum mechanical calculations determine the favorable interactions between various membrane components and the liquid mixture. With IL:HSM addition, the separation factor and performance in lactic acid dehydration were improved compared with pure polymer membrane. The best performance was found for (HSM: IL)-PPO/UPM composite membrane, where the permeate flux and the separation factor of about 0.06 kg m−2 h−1 and 749, respectively, were obtained. The research results demonstrated that ionic liquids in combination with star macromolecules for membrane modification could be a promising approach for membrane design.

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“…Membrane processes are an alternative to traditional separation methods. Pervaporation is one of the most efficient membrane methods for the separation of low molecular weight liquid mixtures, which is widely used for the dehydration of alcohols and other organic substances [ 4 , 5 , 6 , 7 , 8 , 9 ] and characterized by high efficiency with low energy consumption, a compact equipment, environmental friendliness and the ability of the automation [ 10 ]. Pervaporation is also a promising and perspective technology for the separation of azeotropic mixtures without application of additional reagents.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Formation of Ultrathin Selective Layers on the Structure and Performance of Thin-Film Composite Chitosan/PAN Membranes for Pervaporation Dehydration

et al. 2020

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The aim of the study is to improve the performance of thin-film composite (TFC) membranes with a thin selective layer based on chitosan (CS) via different approaches by: (1) varying the concentration of the CS solution; (2) changing the porosity of substrates from polyacrylonitrile (PAN); (3) deposition of the additional ultrathin layers on the surface of the selective CS layer using interfacial polymerization and layer-by-layer assembly. The developed membranes were characterized by different methods of analyses (SEM and AFM, IR spectroscopy, measuring of water contact angles and porosity). The transport characteristics of the developed TFC membranes were studied in pervaporation separation of isopropanol/water mixtures. It was found that the application of the most porous PAN-4 substrate with combination of formation of an additional polyamide selective layer by interfacial polymerization on the surface of a dense selective CS layer with the subsequent layer-by-layer deposition of five bilayers of poly (sodium 4-styrenesulfonate)/CS polyelectrolyte pair led to the significant improvement of permeance and high selectivity for the entire concentration feed range. Thus, for TFC membrane on the PAN-4 substrate the optimal transport characteristics in pervaporation dehydration of isopropanol (12–90 wt.% water) were achieved: 0.22–1.30 kg/(m2h), 99.9 wt.% water in the permeate.

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Strongly Selective Polymer Membranes Modified with Heteroarm Stars for the Ethylene Glycol Dehydration by Pervaporation

Cited by 13 publications

References 46 publications

Novel Mixed Matrix Membranes Based on Polyphenylene Oxide Modified with Graphene Oxide for Enhanced Pervaporation Dehydration of Ethylene Glycol

Novel Mixed Matrix Membranes Based on Polyphenylene Oxide Modified with Graphene Oxide for Enhanced Pervaporation Dehydration of Ethylene Glycol

Enhancing Pervaporation Membrane Selectivity by Incorporating Star Macromolecules Modified with Ionic Liquid for Intensification of Lactic Acid Dehydration

Effect of the Formation of Ultrathin Selective Layers on the Structure and Performance of Thin-Film Composite Chitosan/PAN Membranes for Pervaporation Dehydration

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