Journal of Membrane Science最新文献_第5页

Fluorinated-cardo-based thermally rearranged membranes with enhanced gas separation performance for CO2 capture and hydrogen separation

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-12 DOI: 10.1016/j.memsci.2025.123843

Fangxu Fan, Yongchao Sun, Lu Bai, Tianyou Li, Zeyuan Gao, Gaohong He, Canghai Ma

{"title":"Fluorinated-cardo-based thermally rearranged membranes with enhanced gas separation performance for CO2 capture and hydrogen separation","authors":"Fangxu Fan, Yongchao Sun, Lu Bai, Tianyou Li, Zeyuan Gao, Gaohong He, Canghai Ma","doi":"10.1016/j.memsci.2025.123843","DOIUrl":"10.1016/j.memsci.2025.123843","url":null,"abstract":"<div><div>Thermally rearranged (TR) material has emerged as a focal point in gas separation membranes. However, further enhancing the gas separation performance of TR materials remains a key hurdle. In this study, fluorinated-cardo-based diamine (FFDA) was strategically incorporated into the polybenzoxazole structure to improve the gas selectivity. The size-sieving ability of the polymers was significantly enhanced through the interchain hydrogen bonding and π-π stacking induced by the cardo groups. Furthermore, the aromatic fluorine atoms in FFDA exhibited superior CO<sub>2</sub> adsorption capacity. As the thermal rearrangement progressed and the polybenzoxazole structure developed, pores with a diameter of approximately 3 Å were formed, leading to increased diffusion rate of CO<sub>2</sub> and H<sub>2</sub>. The TR400 °C membranes surpassed the 2018 CO<sub>2</sub>/CH<sub>4</sub> mixed-gas upper bound. Particularly, the 6FDA-FFDA/6FAP(1:1)-TR400 membrane achieved a CO<sub>2</sub> permeability of 185.3 Barrer and a CO<sub>2</sub>/CH<sub>4</sub> selectivity of 79.9—representing increases of 227.3 % and 37.5 %, respectively, compared to the precursor membranes. Moreover, the robust structure of the membrane demonstrated enhanced plasticization resistance, with no discernible plasticization observed under CO<sub>2</sub>/CH<sub>4</sub> mixed-gas conditions up to 20 bar. Our design approach paves the way for developing mechanically robust and highly selective TR membranes, with significant potentials for application in CO<sub>2</sub> separation under aggressive conditions.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123843"},"PeriodicalIF":8.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CoM (M = Mn, Fe, and Cu) LDH-assembled nanoconfined catalytic membranes for efficient micropollutant removal: Performance and atomic-scale mechanism insights

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-12 DOI: 10.1016/j.memsci.2025.123846

Jiahui Zhang , Hongyi Zhang , Zhen Chen , Zhenghua Zhang

{"title":"CoM (M = Mn, Fe, and Cu) LDH-assembled nanoconfined catalytic membranes for efficient micropollutant removal: Performance and atomic-scale mechanism insights","authors":"Jiahui Zhang , Hongyi Zhang , Zhen Chen , Zhenghua Zhang","doi":"10.1016/j.memsci.2025.123846","DOIUrl":"10.1016/j.memsci.2025.123846","url":null,"abstract":"<div><div>Pervasive exposure to different micropollutants (e.g. endocrine disrupting chemicals and pharmaceuticals) present in water environments, presents a notable risk to public health. Herein, three Co-based bimetallic layered double hydroxides (LDHs) were fabricated, then assembled into LDH-based nanoconfined catalytic membranes (CoM<sub>m</sub>, M: Fe, Mn, and Cu) with similar structural and physicochemical properties. The micropollutant removal performance of CoM<sub>m</sub> in the presence of peroxymonosulfate (PMS) was ranked in the order: CoMn<sub>m</sub> > CoFe<sub>m</sub> > CoCu<sub>m</sub>. The CoMn<sub>m</sub> achieved a 100% removal efficiency for pharmaceuticals and endocrine disrupting chemicals, achieving a first-order rate constant (1.64 ms<sup>−1</sup> for ranitidine) that was 10<sup>2</sup>–10<sup>6</sup> higher than traditional LDH catalysts. Density functional theory (DFT) results revealed that CoMn<sub>m</sub> possessed the highest adsorption energy with PMS and d-band centre, exhibiting superior chemisorption activity and faster charge transfer than the other prepared membranes. Furthermore, the nanoconfinement effect within membrane nanochannels contributed to the outstanding performance of CoMn<sub>m</sub>. This study provides an atomic-scale understanding of the catalytic mechanisms of CoM<sub>m</sub>, guiding the design and optimization of catalytic membranes for water purification.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123846"},"PeriodicalIF":8.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance comparison of flat sheet and hollow fibre air gap membrane distillation: A mathematical and simulation modelling approach

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-12 DOI: 10.1016/j.memsci.2025.123836

Hamed Kariman , Hussein A. Mohammed , Masoumeh Zargar , Mehdi Khiadani

{"title":"Performance comparison of flat sheet and hollow fibre air gap membrane distillation: A mathematical and simulation modelling approach","authors":"Hamed Kariman , Hussein A. Mohammed , Masoumeh Zargar , Mehdi Khiadani","doi":"10.1016/j.memsci.2025.123836","DOIUrl":"10.1016/j.memsci.2025.123836","url":null,"abstract":"<div><div>Membrane Distillation (MD) systems could address current challenges related to global water demand. Among MD systems, Air Gap Membrane Distillation (AGMD) systems play crucial roles in addressing this challenge. AGMD systems can be categorized into two main structural groups: flat sheet and hollow fibre forms. It is important to study, analyse, model and compare these two systems under the same operational conditions. In this study, a detailed mathematical model of flat sheet and hollow fibre AGMD modules under the same conditions (i.e., membrane type, membrane area, porosity, and pore radius of membrane) has been introduced. The simulation of system performance parameters, including flux, Temperature Polarization Coefficient (TPC), Specific Thermal Energy Consumption (STEC) and Gain Output Ratio (GOR) have also been conducted, based on various operational conditions and membrane properties. A comprehensive comparison has been then performed between flat sheet AGMD and hollow fibre AGMD systems in terms of flux, TPC, STEC and GOR. The results show that amongst all operational conditions and membrane properties, feed water temperature, air gap thickness, feed water Reynolds number, membrane porosity and pore radius significantly impact the flux of both systems. Furthermore, the operational conditions and membrane properties affected the STEC and GOR. Moreover, the comparison results showed that the hollow fibre system had higher flux, TPC and GOR than the flat sheet system both in laminar and turbulent state of feed water flow, while the flat sheet system showed a higher STEC value than the hollow fibre system in all operational conditions and membrane properties, indicating that a high energy requirement in the case of hollow fibre system for producing the same amount of flow.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123836"},"PeriodicalIF":8.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electric cavity-enhanced catalytic membranes for micropollutant removal in wastewater

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-11 DOI: 10.1016/j.memsci.2025.123823

Jiaxin Wu , Chencheng Qin , Miao Li , Qian Peng , Xiaoai Guo , Zifang Li , Xingzhong Yuan , Edison Huixiang Ang , Meng Sun , Hou Wang

{"title":"Electric cavity-enhanced catalytic membranes for micropollutant removal in wastewater","authors":"Jiaxin Wu , Chencheng Qin , Miao Li , Qian Peng , Xiaoai Guo , Zifang Li , Xingzhong Yuan , Edison Huixiang Ang , Meng Sun , Hou Wang","doi":"10.1016/j.memsci.2025.123823","DOIUrl":"10.1016/j.memsci.2025.123823","url":null,"abstract":"<div><div>An urgent need exists for a green and energy-efficient method for ultra-rapid micropollutant removal from wastewater. Exploring the use of membrane-in-electric cavity system for pharmaceutical decomposition on seconds timescale presents a compelling yet novel approach. An effective photocatalytic membrane with interconnected inner cavities, composed of TFPT-TAPT-COF and NH<sub>2</sub>–Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> (NTCM), was synthesized using 3-aminopropyltriethoxysilane mediated self-assembly method. Theoretical analysis confirms a charge transfer number of approximately 2.7 |e| within the heterojunction, creating strong built-in electric fields within the cavity walls. In single-pass flow-through wastewater treatment, the NTCM membrane achieved up to 95.4 % removal of norfloxacin, with a disappearance rate of 2.45 × 10⁻⁴ mol m<sup>−1</sup> s<sup>−1</sup>, within a residence time of 3.42 s under 70 mW cm<sup>−2</sup> light irradiation and a flow rate of 1 mL min<sup>−1</sup>. This exceptional efficiency is attributed to the complete separation and swift transfer of photoinduced carriers, which significantly amplifies the likelihood of collisions with micropollutants and facilitates their removal within the confined space of the dynamic convective flow, thereby enhancing the overall pollutant degradation process. Additionally, the NTCM membrane's self-oxygenating feature allows it to effectively treat a range of wastewater substrates, including near-neutral wastewater, fulvic acid, and charged ion species. However, carbonate ions significantly inhibit norfloxacin removal. Overall, this study introduces a cost-effective, high-efficiency, and low-energy approach to micropollutant removal in wastewater treatment.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123823"},"PeriodicalIF":8.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanofiltration membranes with sandwich-like mixed charge layers for high-efficiency Mg2+/Li+ separation

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-11 DOI: 10.1016/j.memsci.2025.123834

Yunhao Li , Wu Kuang , Haijun Yu , Dandan Liu , Yanfang Liu , Guodong Kang , Xinmiao Liang , Yiming Cao

{"title":"Nanofiltration membranes with sandwich-like mixed charge layers for high-efficiency Mg2+/Li+ separation","authors":"Yunhao Li , Wu Kuang , Haijun Yu , Dandan Liu , Yanfang Liu , Guodong Kang , Xinmiao Liang , Yiming Cao","doi":"10.1016/j.memsci.2025.123834","DOIUrl":"10.1016/j.memsci.2025.123834","url":null,"abstract":"<div><div>Efficient separation of monovalent/multivalent cations and anions is essential for optimizing lithium extraction from Salt-Lake to simplify production processes and reduces costs. Nevertheless, the conventional nanofiltration membranes with specific charges can only separate either cations or anions. To overcome this limitation, a novel strategy is proposed for fabricating nanofiltration membranes with “negative-positive-negative” sandwich-like mixed charge configuration. Herein, two aqueous monomers (phenylbiguanide and polyethyleneimine) with significantly different diffusion rates are employed to react with trimesoyl chloride to form a nascent polyamide layer via interfacial polymerization. Subsequently, phenylbiguanide that preferentially diffuses to top surface of nascent membrane and unreacted amine groups from polyethyleneimine are used to react with <em>m</em>-phenylenedisulfonyl chloride to form a polysulfonamide/polyamide functional layer. The unreacted sulfonyl chloride groups and trimesoyl chloride near aqueous phase could hydrolyzes more easily, producing negatively charged sulfonic acid and carboxyl groups on the top and bottom. Meanwhile, the main part of polyamide layer is positively charged attributed to numerous unreacted amine groups. The “negative-positive-negative” sandwich-like configuration was proven using TOF-SIMS. The fabricated membrane exhibited a selectivity of 57.22 for MgCl<sub>2</sub>/LiCl and 30.61 for Na<sub>2</sub>SO<sub>4</sub>/NaCl. Furthermore, Mg<sup>2+</sup>/Li<sup>+</sup> selectivity of 57.34 was achived for the mixed salt solution (Mg<sup>2+</sup>/Li<sup>+</sup> = 45), showing good application potential in lithium extraction.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123834"},"PeriodicalIF":8.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced CO₂ separation performance of mixed-matrix membranes through PIM-1 based surface engineering using non-solvent induced surface deposition

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-11 DOI: 10.1016/j.memsci.2025.123838

Chanhyuk Kang , Yeji Moon , Joo Eon Kim , Hyojin Kim , Jinhan Cho , Jinkee Hong , Jaesung Park , Byoung Gak Kim

{"title":"Enhanced CO₂ separation performance of mixed-matrix membranes through PIM-1 based surface engineering using non-solvent induced surface deposition","authors":"Chanhyuk Kang , Yeji Moon , Joo Eon Kim , Hyojin Kim , Jinhan Cho , Jinkee Hong , Jaesung Park , Byoung Gak Kim","doi":"10.1016/j.memsci.2025.123838","DOIUrl":"10.1016/j.memsci.2025.123838","url":null,"abstract":"<div><div>Carbon dioxide (CO<sub>2</sub>), a major greenhouse gas, significantly contributes to global warming and negatively affects ecosystems. This necessitates the development of high-performance materials for CO<sub>2</sub> removal. Mixed-matrix membranes (MMMs) incorporating metal-organic frameworks (MOFs) are effective for CO₂ separation, but the poor interfacial compatibility between the polymer and filler often reduces membrane performance. In this study, the interfacial issue in MMMs was addressed by surface modification of ZIF-8 with polymers of intrinsic microporosity (PIM-1) using the non-solvent induced surface deposition method. The PIM-1 polymer on the ZIF-8 surface has a high surface area, which prevents pore blockage and overcomes the interfacial issue with the polymer matrix. The effect was studied using Pebax-1657 as a host polymer matrix. At 20 % loading, MMMs with surface-modified ZIF-8@PIM-1 exhibited enhanced CO₂/N₂ and CO₂/CH₄ selectivities, increasing from 44.4 to 15.1 to 45.6 and 18.8, respectively, compared to those of MMMs with unmodified ZIF-8. In addition, the CO₂ permeability increased by about 40 %, from 71 barrer to 105 barrer, compared to that of pure Pebax-1657. This study demonstrates that simple surface modification with PIM-1 can effectively address the interfacial issues between the polymer matrix and MOF in MMMs.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123838"},"PeriodicalIF":8.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The application of forward osmosis for producing highly concentrated biotherapeutics

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-11 DOI: 10.1016/j.memsci.2025.123839

Vasudev Tangry, William Haddad, Ali Behboudi, Andrew L. Zydney

{"title":"The application of forward osmosis for producing highly concentrated biotherapeutics","authors":"Vasudev Tangry, William Haddad, Ali Behboudi, Andrew L. Zydney","doi":"10.1016/j.memsci.2025.123839","DOIUrl":"10.1016/j.memsci.2025.123839","url":null,"abstract":"<div><div>Forward osmosis (FO) has primarily been explored for applications in water desalination. While FO has also shown potential in concentrating dairy products, little to no attention has been paid to its potential in concentrating biotherapeutics, particularly to the very high concentrations needed for many monoclonal antibody products that are delivered by subcutaneous injection. This study demonstrates the feasibility of using FO as an alternative to ultrafiltration (UF) to achieve highly concentrated protein formulations using human Immunoglobin G (hIgG) as a model protein. The permeate flux in FO, using 1 M NaCl as the draw solution, decreased with increasing hIgG concentration due primarily to concentration polarization effects that are strongly influenced by the increase in feed viscosity for the concentrated hIgG solution. The importance of the hIgG viscosity on the FO performance was demonstrated by performing experiments with concentrated polyethylene glycol solutions and through mathematical modeling that accounts for the effects of both external and internal concentration polarization on FO performance. Batch concentration experiments with FO achieved final hIgG concentrations greater than 290 g/L compared to a maximum achievable concentration in UF of approximately 150 g/L. These results clearly demonstrate the potential of using FO, with high osmotic pressure draw solutions, to achieve highly concentrated formulations of therapeutic proteins that are beyond the capability of current UF processes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123839"},"PeriodicalIF":8.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO2-selective transport in PEGDA facilitated transport membranes post-functionalized using click chemistry

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-11 DOI: 10.1016/j.memsci.2025.123825

Ryan A. Johnson, Zoe Reddecliff, Karim El Hajj Sleiman, Joshua D. Moon

{"title":"CO2-selective transport in PEGDA facilitated transport membranes post-functionalized using click chemistry","authors":"Ryan A. Johnson, Zoe Reddecliff, Karim El Hajj Sleiman, Joshua D. Moon","doi":"10.1016/j.memsci.2025.123825","DOIUrl":"10.1016/j.memsci.2025.123825","url":null,"abstract":"<div><div>A new synthetic strategy to post-functionalize PEGDA membranes using active ester click chemistry was used to study the effects of Lewis base ligand grafting density and basicity on facilitated CO<sub>2</sub> transport and separation. Increasing imidazole ligand content from 0 mol% to 60 mol% causes both CO<sub>2</sub> and N<sub>2</sub> permeabilities to drop by 90+% due to a decrease in gas diffusivities. These diffusivities decrease due to increased chain stiffness from the substitution of flexible PEG groups with stiffer acrylamides. Increasing Lewis basicity of grafted ligands appears to hinder CO<sub>2</sub> diffusion due to stronger interactions between the base and CO<sub>2</sub> resulting in a 60 % decrease in permeability. This decrease in permeability is accompanied by apparent CO<sub>2</sub> chemisorption in piperazine (secondary amine) containing samples and a simultaneous decrease in CO<sub>2</sub> diffusion likely due to immobilization of some CO<sub>2</sub> as carbamate. These findings allow for better understanding of how nitrogenous Lewis base ligands impact CO<sub>2</sub> separations in low T<sub>g</sub> copolymer membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123825"},"PeriodicalIF":8.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring microstructure of polysulfone composite membranes for alkaline water electrolysis

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-10 DOI: 10.1016/j.memsci.2025.123830

Yaran Du , Haoyang Gao , Maliang Zhang , Kunmei Su , Zhenhuan Li

{"title":"Tailoring microstructure of polysulfone composite membranes for alkaline water electrolysis","authors":"Yaran Du , Haoyang Gao , Maliang Zhang , Kunmei Su , Zhenhuan Li","doi":"10.1016/j.memsci.2025.123830","DOIUrl":"10.1016/j.memsci.2025.123830","url":null,"abstract":"<div><div>Alkaline water electrolysis (AWE) systems have been the focus of increasing attention in the green energy field due to their zero carbon emissions. The composite membrane, as a critical component of AWE, is typically used to enhance hydrogen production efficiency by incorporating nanofillers. However, over time, the separation of nanofillers can result in gas cross-permeation, thereby increasing operational risks. This study introduces polyethyleneimine (PEI) into the composite membrane, where hydrogen bonds are formed within the membrane, resulting in a composite membrane with a tunable microporous structure. The resulting composite membrane separator exhibited outstanding performance, achieving a maximum bubble point pressure of 3.96 bar and a decreased area resistance of 0.21 Ω cm<sup>2</sup>. When subjected to a voltage of 2 V, the composite membrane separator achieved a current density of 896 mA cm<sup>−2</sup> at 80 °C in 30 wt% KOH, demonstrating excellent stability. Compared with existing advanced composite membranes, this membrane exhibited a notable advantage in terms of electrolytic performance. This study offers crucial insights for advancing the development of high-performance AWE membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123830"},"PeriodicalIF":8.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of temperature-induced micelle transition behavior of Pluronic additive on asymmetric ultrafiltration membrane formation and performance

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-10 DOI: 10.1016/j.memsci.2025.123837

Turong Shi, Jiachun Feng, Beibei Tang

{"title":"Influence of temperature-induced micelle transition behavior of Pluronic additive on asymmetric ultrafiltration membrane formation and performance","authors":"Turong Shi, Jiachun Feng, Beibei Tang","doi":"10.1016/j.memsci.2025.123837","DOIUrl":"10.1016/j.memsci.2025.123837","url":null,"abstract":"<div><div>Amphiphilic block copolymers are widely used as additives in ultrafiltration membranes preparation by nonsolvent-induced phase separation. During membrane-forming process, an increase in coagulation bath temperature (CBT) will accelerate the kinetics of phase inversion and also promote the micellization of amphiphilic block copolymers. Herein, polyethylene oxide-polypropylene oxide-polyethylene oxide, marketed as Pluronic, is utilized as an additive for preparing asymmetric ultrafiltration membranes. Influence of temperature-induced micelle transition behavior of Pluronic on membrane formation and performance is investigated in detail. It is found that when the CBT increases, temperature-induced micelle transition of Pluronic will lead to a dual effect: (1) The decrease in Pluronic diffusion rate results in a reduced diffusion of the solvent interacting with it, thereby slowing down the precipitation kinetics during phase inversion. (2) The decrease in particle size of Pluronic micelles brings about a reduction in the region left by Pluronic micelles extracted from the casting solution, thus decreasing the membrane pore size. The intrinsic characters of Pluronic, including molecular weight, hydrophilic and hydrophobic block ratio and concentration, determine the dual effect of micelle transition. This work provides an in-depth understanding and practical guidance for the preparation of asymmetric membranes with amphiphilic block copolymers as additive systems.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123837"},"PeriodicalIF":8.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0