Membranes and Membrane Technologies最新文献_第3页

Transport and Structural Characteristics of Heterogeneous Ion-Exchange Membranes with Varied Dispersity of the Ion Exchanger 离子交换剂分散度不同的异质离子交换膜的传输和结构特征

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624020082

V. I. Vasil’eva, E. E. Meshcheryakova, O. I. Chernyshova, M. A. Brovkina, I. V. Falina, E. M. Akberova, S. V. Dobryden’

{"title":"Transport and Structural Characteristics of Heterogeneous Ion-Exchange Membranes with Varied Dispersity of the Ion Exchanger","authors":"V. I. Vasil’eva, E. E. Meshcheryakova, O. I. Chernyshova, M. A. Brovkina, I. V. Falina, E. M. Akberova, S. V. Dobryden’","doi":"10.1134/S2517751624020082","DOIUrl":"10.1134/S2517751624020082","url":null,"abstract":"The structural and transport (conductivity, diffusion permeability) properties of cation- and anion-exchange membranes with varied dispersity of ion-exchange resin particles are studied in the work. Experimental MK-40 cation-exchange and MA-41 anion-exchange membranes with variable particle size of the ion-exchange resin of <20 to <71 μm were manufactured at LLC IE Shchekinoazot (Russia). A comparative analysis of the structural characteristics of the membranes by SEM reveals the anisotropy in the properties of the surface and section. The internal phase of the membrane is characterized by high values of the fraction and sizes of the ion exchanger and macroporosity. A comparison of the concentration dependences of the specific conductivity and diffusion permeability of the experimental membranes is performed. The analysis of the values of the model transport-structural parameters shows that an increase in the conductivity of the gel phase from 0.39 up to 0.47 S/m and from 0.15 up to 0.26 S/m for cation- and anion-exchange membranes, respectively, as well as redistribution of current transfer paths in the membrane are observed in the case of a decrease in the particle size of the ion exchanger. An increase in the contribution from transfer of the internal equilibrium solution along the channel is revealed; here, the transfer numbers of counterions slightly change. Information about the changes in the structure of the transport channels in membranes with different particle sizes of the ion exchanger obtained based on the analysis of the model parameters is consistent with the data of independent studies of the morphology of their surface and section by SEM.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"6 2","pages":"120 - 131"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poly(urethane-imides) and Poly(ester-imides) as Promising Materials for Gas Separation and Pervaporation Membranes 聚（氨基甲酸乙酯-酰亚胺）和聚（酯-酰亚胺）作为气体分离和渗透膜的理想材料

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624010037

A. L. Didenko, A. S. Nesterova, T. S. Anokhina, I. L. Borisov, V. V. Kudryavtsev

引用次数: 0

Separation of Oil-in-Water Emulsion by Polyamide Membranes Treated with Corona Discharge Plasma 用电晕放电等离子体处理聚酰胺膜分离水包油型乳液

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624010049

V. O. Dryakhlov, I. G. Shaikhiev, D. D. Fazullin, I. R. Nizameev, M. F. Galikhanov, I. F. Mukhamadiev

引用次数: 0

Modeling of Ion Transport in a Three-Layer System with an Ion-Exchange Membrane Based on the Nernst–Planck and Displacement Current Equations 基于 Nernst-Planck 和位移电流方程的离子交换膜三层系统中的离子传输模型

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624010074

A. M. Uzdenova

{"title":"Modeling of Ion Transport in a Three-Layer System with an Ion-Exchange Membrane Based on the Nernst–Planck and Displacement Current Equations","authors":"A. M. Uzdenova","doi":"10.1134/S2517751624010074","DOIUrl":"10.1134/S2517751624010074","url":null,"abstract":"Modeling of ion transport in a three-layer system containing an ion-exchange membrane and two adjacent diffusion layers makes it possible to describe the permselectivity of the membrane by determining its fixed charge density. For theoretical analysis of ion transport in such systems, the Nernst–Planck and Poisson equations are widely used. The article shows that, in the galvanodynamic mode of operation of the membrane system when the density of the flowing current is specified, the Poisson equation in the ion transport model can be replaced by the equation for the displacement current. A new model is constructed in the form of a boundary value problem for the system of the Nernst–Planck and displacement current equations, based on which the concentrations of ions, electric field strength, space charge density, and chronopotentiogram of the ion-exchange membrane and adjacent diffusion layers in a direct current mode are numerically calculated. The calculation results of the proposed model are in a good agreement with the results of the modeling based on the previously described approach using the Nernst–Planck and Poisson equations as well as with the analytical assessment of the transition time. It is shown that, in the case of the three-layer geometry of the problem, the required accuracy of the numerical calculation using the proposed model is achieved with a smaller number of computational mesh elements and takes less (about 26.7-fold for the system parameters under consideration) processor time in comparison with the model based on the Nernst–Planck and Poisson equations.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"6 1","pages":"1 - 8"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Gas Transport Properties of Polynaphthoylenebenzimidazoles with Keto- and Sulfonic Bridging Groups 带有酮和磺酸桥基的聚萘甲苯并咪唑的合成及其气体传输特性

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624010025

A. Yu. Alentiev, I. I. Ponomarev, Yu. A. Volkova, R. Yu. Nikiforov, D. A. Syrtsova, N. A. Belov

{"title":"Synthesis and Gas Transport Properties of Polynaphthoylenebenzimidazoles with Keto- and Sulfonic Bridging Groups","authors":"A. Yu. Alentiev, I. I. Ponomarev, Yu. A. Volkova, R. Yu. Nikiforov, D. A. Syrtsova, N. A. Belov","doi":"10.1134/S2517751624010025","DOIUrl":"10.1134/S2517751624010025","url":null,"abstract":"Polynaphthoylenebenzimidazoles (PNBI) with keto (PNBI-СО) and sulfonic (PNBI-SO2) bridging groups are prepared by the solid-phase polycyclization of films of corresponding polyaminoimides (PANI) synthesized by the polycondensation of 1,4,5,8-naphthalenetetracarboxylic dianhydride with 3,3',4,4'-tetraaminobenzophenone and 3,3',4,4'-tetraaminodiphenyl sulfone in N-methylpyrrolidone, respectively. The polycondensation process and the chemical structure of the resulting PANI and PNBI are controlled by 1Н and 13С NMR and IR spectroscopy. It is shown that variation in the temperature of solid-state polycyclization allows for the synthesis of polymers with various cyclization degrees. The experimental values of gas permeability and diffusion coefficients for He, H2, N2, O2, CO2, and CH4 are measured, and the solubility coefficients and ideal selectivity for various gas pairs are calculated. It is found that in terms of the permeability/selectivity ratio completely cyclized PNBI are advantageous over incompletely cyclized ones. This finding should be taken into account when choosing a polymer and a selective layer formation method to develop novel composite membranes. The gas transport characteristics achieved for completely cyclized PNBI-SO2 and their good film-forming properties combined with a very high thermal stability of this class polymers are of great interest for further expanding the PNBI range and prospects for applying novel polymers of this class in various gas separation processes.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"6 1","pages":"27 - 36"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ceramic Substrates for Filtration Membranes Based on Fine Fly Ash Microspheres 基于细粉煤灰微球的过滤膜陶瓷基板

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624020033

E. V. Fomenko, G. V. Akimochkina, A. G. Anshits, N. P. Fadeeva, I. A. Kharchenko, E. V. Elsuf’ev, K. A. Shabanova, A. A. Maksimova, I. I. Ryzhkov

{"title":"Ceramic Substrates for Filtration Membranes Based on Fine Fly Ash Microspheres","authors":"E. V. Fomenko, G. V. Akimochkina, A. G. Anshits, N. P. Fadeeva, I. A. Kharchenko, E. V. Elsuf’ev, K. A. Shabanova, A. A. Maksimova, I. I. Ryzhkov","doi":"10.1134/S2517751624020033","DOIUrl":"10.1134/S2517751624020033","url":null,"abstract":"A procedure has been proposed for producing ceramic substrates for filtration membranes based on a narrow fraction of fine fly ash microspheres using cold uniaxial pressing followed by high-temperature firing. It has been shown that increasing the sintering temperature from 1000 to 1150°C leads to a decrease in open porosity from 40 to 24%, a decrease in the average pore size from 1.60 to 0.34 μm, and an increase in the compressive strength from 9.5 to 159 MPa. The resulting substrates are characterized by water permeability values of 1210, 310, 240, 170 L m−2 h−1 bar−1 at sintering temperatures of 1000, 1050, 1100 and 1150°C, respectively. Experiments on filtration of aqueous suspensions of fine microspheres (dav = 2.5 µm) and microsilica (dav = 1.9 μm) through a substrate produced at a sintering temperature of 1150°C have shown the rejection close to 100%. The proposed methodology for using ash waste in the production of membrane materials promotes the development of technologies for the integrated processing of thermal energy waste.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"6 2","pages":"71 - 83"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crosslinking of Brominated Poly(1-trimethylsilyl-1-propyne) Using Polyethylenimine as a Crosslinking Agent 使用聚乙烯亚胺作为交联剂交联溴化聚(1-三甲基硅基-1-丙炔)

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624020057

V. P. Makrushin, A. A. Kossov, E. G. Litvinova, G. N. Bondarenko, S. M. Matson

{"title":"Crosslinking of Brominated Poly(1-trimethylsilyl-1-propyne) Using Polyethylenimine as a Crosslinking Agent","authors":"V. P. Makrushin, A. A. Kossov, E. G. Litvinova, G. N. Bondarenko, S. M. Matson","doi":"10.1134/S2517751624020057","DOIUrl":"10.1134/S2517751624020057","url":null,"abstract":"Сrosslinked polymer memranes are obtained by the heat treatment of films prepared from a solution of a mixture of bromine-containing poly(1-trimethylsilyl-1-propyne) (PTMSP) and polyfunctional amine polyethyleneimine (PEI) as a crosslinking agent. Crosslinked products are identified from IR spectra, elemental analysis data, and stability of reaction products to a solvent (CCl4), in which the original brominated PTMSP is soluble. According to the IR spectra, the crosslinking reaction occurs via reactive C–Br bond in bromine-containing PTMSP with the participation of PEI amino groups at a temperature above 90°С. The crosslinking of bromine-containing PTMSP makes it resistant to organic solvents. An increase in the content of PEI in the mixture correlates with the proportion of bromine atoms involved in the reaction. For brominated PTMSP films crosslinked by PEI transport parameters for individual gases and in the mixture n-butane/methane (98.4 mol % methane and 1.6 mol % n-butane) are studied. In the sequence PTMSP–brominated PTMSP-Br–PTMSP-Br/PEI (before crosslinking)–PTMSP-Br/PEI (after crosslinking) permeability for individual gases decreases. Crosslinked PTMSP in the mixture methane/n-butane demonstrates high permeability coefficients of n-butane (({{P}_{{n{text{-}}{{{text{C}}}_{{text{4}}}}{{{text{H}}}_{{10}}}}}}) = 12 000 Barrer) and selectivity for n-butane separation from a mixture with methane (({{alpha }_{{n{text{-}}{{{text{C}}}_{{text{4}}}}{{{text{H}}}_{{10}}}{text{/C}}{{{text{H}}}_{4}}}}}) = 13).","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"6 2","pages":"84 - 91"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supercritical CO2 Treatment of Mixed Matrix Membranes Based on Polyimides for Improvement of Their Gas Transport Properties 对基于聚酰亚胺的混合基质膜进行超临界二氧化碳处理以改善其气体传输性能

IF 2

Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI: 10.1134/S2517751624020070

D. A. Syrtsova, A. Yu. Alentiev, A. Yu. Nikolaev, D. A. Kletnov, D. A. Chistyakova, R. Yu. Nikiforov, V. E. Ryzhikh, N. A. Belov, R. Sabouri, M. Demirci, C. Yildirim, S. B. Tantekin-Ersolmaz

{"title":"Supercritical CO2 Treatment of Mixed Matrix Membranes Based on Polyimides for Improvement of Their Gas Transport Properties","authors":"D. A. Syrtsova, A. Yu. Alentiev, A. Yu. Nikolaev, D. A. Kletnov, D. A. Chistyakova, R. Yu. Nikiforov, V. E. Ryzhikh, N. A. Belov, R. Sabouri, M. Demirci, C. Yildirim, S. B. Tantekin-Ersolmaz","doi":"10.1134/S2517751624020070","DOIUrl":"10.1134/S2517751624020070","url":null,"abstract":"In this work, mixed matrix membranes (MMMs) were obtained based on polyimides synthesized from a mixture of diethyltoluene diamine (DETDA) isomers and BPDA and 6FDA dianhydrides by introducing metal-organic framework compounds ZIF-8 and ZIF-67 in a concentration of up to 20 wt % in chloroform solution. The starting polyimides were synthesized by one-stage high-temperature catalytic polycondensation in a benzoic acid melt. The studied MMMs were treated with sc-CO2 followed by decompression. The gas transport and gas selective properties of the original and modified membranes were studied. Experimental values of the effective coefficients of permeability and diffusion of gases for He, H2, O2, N2, CO2, CH4 were obtained, and the effective solubility coefficients of these gases were calculated. It was found that treatment of the studied MMMs in sc-CO2 can significantly increase the level of gas permeability of membranes with gas selectivity at the level of initial values, while the achieved effect of changing the permeability of membranes depends on the gas, the nature of the matrix, and the concentration of the introduced particles. It was found that the treatment effect persists over time with a slight decrease in permeability of gases, which remains at a level significantly higher than the initial values. The demonstrated effect of improving gas transport properties when treating MMMs based on polyimide matrices 6FDA-DETDA and BPDA-DETDA in sc-CO2 can be used for further application of the proposed modification method in order to increase gas transport through MMMs based on other polymers, including highly permeable ones.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"6 2","pages":"92 - 103"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of Hollow Fiber Membranes: Effect of Process Parameters (Review) 中空纤维膜的制造：工艺参数的影响（综述）

IF 2

Membranes and Membrane Technologies Pub Date : 2024-03-04 DOI: 10.1134/S2517751623070016

D. N. Matveev, T. S. Anokhina, V. V. Volkov, I. L. Borisov, A. V. Volkov

{"title":"Fabrication of Hollow Fiber Membranes: Effect of Process Parameters (Review)","authors":"D. N. Matveev, T. S. Anokhina, V. V. Volkov, I. L. Borisov, A. V. Volkov","doi":"10.1134/S2517751623070016","DOIUrl":"10.1134/S2517751623070016","url":null,"abstract":"Hollow fiber membranes originally developed in the 1960s for the reverse osmosis process have since then become widely used for diverse separation processes. The advantages of hollow fiber membranes include the low energy consumption, ease of operation and, among the most important ones, highly efficient operation in a small footprint (a large membrane area can be packed into a module unit). The production of hollow fiber membranes involves many spinning parameters to be controlled. The list of these parameters, in particular, includes the viscosity of the spinning solution, the design and geometric parameters of the spinneret, the extrusion speed of the polymer solution, the composition and temperature of the bore fluid, the type of external coagulant, the air gap distance, the draw ratio, etc. The effect of these parameters on the properties of hollow fiber membranes is reviewed. Research data pertaining to the modification of polymers, both commercially available and at the stage of their synthesis, are also presented in the context of membrane applications. In addition, the preparation of membranes using non-toxic or less toxic solvents is discussed.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"5 1 supplement","pages":"S1 - S21"},"PeriodicalIF":2.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140026262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic Transport Coefficients through a Bilayer Ion Exchange Membrane during Electrodiffusion 电扩散过程中双层离子交换膜的动力学输运系数

IF 1.6

Membranes and Membrane Technologies Pub Date : 2023-12-01 DOI: 10.1134/S2517751623060082

V. V. Ugrozov, A. N. Filippov

{"title":"Kinetic Transport Coefficients through a Bilayer Ion Exchange Membrane during Electrodiffusion","authors":"V. V. Ugrozov, A. N. Filippov","doi":"10.1134/S2517751623060082","DOIUrl":"10.1134/S2517751623060082","url":null,"abstract":"Analytical expressions for the specific coefficients of electrical conductivity and electrodiffusion of a bilayer ion exchange membrane have been obtained in terms of thermodynamics of irreversible processes and the homogeneous model of a fine-pore membrane. The influence of the physicochemical parameters of the modifying layer and the electrolyte concentration on the obtained values of the coefficients at fixed physicochemical characteristics of the substrate has been explored using mathematical modeling. It has been shown that the conductivity and electrodiffusion of the modified membrane increase with increasing the space charge density of the modifying layer when the signs of the space charges of the membrane layers are identical and decrease when they differ or the thickness of the modifying layer increases. With increasing electrolyte concentration, these characteristics of the modified membrane increase regardless of the sign of charges of the membrane layers. The obtained analytical expressions can be used in modeling electromembrane processes and predicting the characteristics of new surface-modified ion exchange membranes.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"5 6","pages":"423 - 429"},"PeriodicalIF":1.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138473190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0