Hybrid macromolecular stars incorporated poly(phenylene oxide) membranes: Organization, physical, and gas separation properties

Pulyalina, Alexandra; Rostovtseva, Valeriia; Polotskaya, G. A.; Виноградова, Л. В.; Zoolshoev, Z. F.; Simonova, Maria; Hairullin, Andrei; Тойкка, А. М.; Pientka, Z.

doi:10.1016/j.polymer.2019.04.005

Cited by 11 publications

(13 citation statements)

References 44 publications

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“…However, this effect of IL does not occur when adding the IL in combination with the star component (HSM:IL). This fact can be supported data of the previous work [ 51 ], where the XRD method was used to study PPO membranes modified with various concentrations HSM, from which it followed that the inclusion of stars in the membrane does not change the character and degree of crystallinity of the membrane.…”

Section: Resultssupporting

confidence: 85%

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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Section: Resultssupporting

confidence: 85%

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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“…In the region up to 400 • C, a small weight loss~4 wt% was recorded which is a result of the release of moisture and low molecular weight impurities sorbed on the surface of the membranes, as well as a result of the destruction of HAS arms. Thermal decomposition of the PS arms is possible at~450 • C. PTBMA is another arm of HAS which is prone to depolymerization at heating, and destruction of PTBMA arms is observed at~300 • C [40]. Some difference in the position of the destruction curves for PPO/HAS with different content of the modifier can be explained by the contribution of destructive processes of the star macromolecules.…”

Section: Membrane Characterizationmentioning

confidence: 99%

“…The transport properties of the PPO/HAS (5%) membrane was compared with literature data for pervaporation separation of the EG/water mixture (10 wt% water). Table 4 lists data on PSI, total flux, and separation factor that had been obtained for different polymer membranes [7][8][9][36][37][38][39][40][41]. The PPO/HAS (5%) membrane shows higher separation efficiency in the EG dehydration as compared with most published data, but it has moderate flux.…”

Section: Transport Propertiesmentioning

confidence: 99%

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

et al. 2020

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Hybrid membranes based on poly (2,6-dimethyl-1,4-phenylene oxide) modified with heteroarm stars (HAS) were developed to separate ethylene glycol/water mixtures by pervaporation. The HAS consist of a small branching center fullerene C 60 and twelve arms of different nature, six arms of nonpolar polystyrene and six arms of polar poly-tert-butyl methacrylate. The changes of structure and physical properties with HAS inclusion were systematically studied using SEM, X-ray diffraction analysis, TGA, and contact angle measurements. Mass transfer of ethylene glycol and water through membranes was studied by sorption and pervaporation tests. It was found that the growth of HAS content up to 5 wt% in the membrane leads to an increase in the total flux and a strong increase in the separation factor. To evaluate intrinsic properties of the penetrant–membrane system, permeability and selectivity were calculated. Overall, utilizing star-shaped macromolecules as a filler can be a promising way to improve the separation performance of diffusion membranes.

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“…PPO is an aromatic glassy polymer with high mechanical and thermal stability, resistance to chemical agents, and high permeability to gases [14]. 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].…”

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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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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Hybrid macromolecular stars incorporated poly(phenylene oxide) membranes: Organization, physical, and gas separation properties

Cited by 11 publications

References 44 publications

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

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

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

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

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