Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100160
Fuat Topuz , Zainah A. AlDhawi , Mahmoud A. Abdulhamid
Oil spills and the release of oily wastewater have caused serious damage to the environment and human health. Effective removal of oil spills and separation of oil/water mixtures have become a crucial step before they enter the environment and reveal their potentially harmful effects on aquatic ecology. In this context, herein, fibrous membranes based on sulfonated poly (ether-ether-ketone) (SPEEK) were produced and used for the adsorption of crude oils and their derivatives. PEEK was treated with H2SO4 at different times, and the concentrated solutions of the SPEEK were electrospun into bead-free nanofibers. The contact angle measurements with water and oils (i.e., crude oils, diesel, and gasoline) demonstrated the amphiphilic nature of the membranes. Depending on the crude oil sample used and the degree of sulfonation (DoS) of SPEEK, the crude oil sorption capacities ranged from 9 to 80 g g−1, while the adsorption capacities for gasoline and diesel were measured as 3 and 13 g g−1, respectively. As the DoS increased, the oil adsorption capacity of fibrous membranes declined due to the increased hydrophilicity of the membranes. Due to their amphiphilic nature, the SPEEK membranes could effectively remove even a thin layer of oil on seawater, a task that is challenging for most hydrophobic adsorbents. Fibrous SPEEK membranes could be employed as low-cost solutions for oil spill remediation and oil-in-water separation.
石油泄漏和含油废水的排放对环境和人类健康造成了严重损害。有效清除溢油和分离油水混合物已成为其进入环境并暴露其对水生生态的潜在有害影响之前的关键步骤。在此背景下，本文生产了基于磺化聚醚醚酮（SPEEK）的纤维膜，并用于吸附原油及其衍生物。用不同时间的H2SO4处理PEEK，将SPEEK浓缩液电纺成无珠纳米纤维。与水和油（即原油、柴油和汽油）的接触角测量证明了膜的两亲性。根据所使用的原油样品和SPEEK的磺化程度（DoS），原油的吸附量为9 ~ 80 g g−1，而汽油和柴油的吸附量分别为3和13 g g−1。随着DoS的增加，纤维膜的油吸附能力下降，这是由于膜的亲水性增加。由于SPEEK膜的两亲性，它可以有效地去除海水上一层薄薄的油，这对于大多数疏水吸附剂来说都是一个挑战。SPEEK纤维膜可以作为低成本的解决方案用于溢油修复和油水分离。
{"title":"Electrospun amphiphilic sulfonated poly(ether-ether-ketone) (SPEEK) membranes for thin-layer crude oil spill cleanup","authors":"Fuat Topuz , Zainah A. AlDhawi , Mahmoud A. Abdulhamid","doi":"10.1016/j.advmem.2025.100160","DOIUrl":"10.1016/j.advmem.2025.100160","url":null,"abstract":"<div><div>Oil spills and the release of oily wastewater have caused serious damage to the environment and human health. Effective removal of oil spills and separation of oil/water mixtures have become a crucial step before they enter the environment and reveal their potentially harmful effects on aquatic ecology. In this context, herein, fibrous membranes based on sulfonated poly (ether-ether-ketone) (SPEEK) were produced and used for the adsorption of crude oils and their derivatives. PEEK was treated with H<sub>2</sub>SO<sub>4</sub> at different times, and the concentrated solutions of the SPEEK were electrospun into bead-free nanofibers. The contact angle measurements with water and oils (<em>i</em>.<em>e</em>., crude oils, diesel, and gasoline) demonstrated the amphiphilic nature of the membranes. Depending on the crude oil sample used and the degree of sulfonation (DoS) of SPEEK, the crude oil sorption capacities ranged from 9 to 80 g g<sup>−1</sup>, while the adsorption capacities for gasoline and diesel were measured as 3 and 13 g g<sup>−1</sup>, respectively. As the DoS increased, the oil adsorption capacity of fibrous membranes declined due to the increased hydrophilicity of the membranes. Due to their amphiphilic nature, the SPEEK membranes could effectively remove even a thin layer of oil on seawater, a task that is challenging for most hydrophobic adsorbents. Fibrous SPEEK membranes could be employed as low-cost solutions for oil spill remediation and oil-in-water separation.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100160"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518962","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}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100155
Zheng Liu , Qiaoyun Ye , Qian Chen, Liang Ge, Xingya Li, Tongwen Xu
Electrodialysis technology is widely deployed in the field of separation due to its simplicity of operation and sustainability, where ion-exchange membranes are the most critical components in this process. Traditional cation-exchange membranes are typically suitable for mild conditions and often suffer from issues such as poor stability and susceptibility. In this study, we design a novel cation-exchange membrane featuring a rigid backbone with sulfonic acid groups as side chains and fluorine-containing region. The resultant membrane exhibits high thermal stability, acid resistance, and oxidation resistance, without degradation of functional groups and decline in mechanical strength after treatment in 1 mol L−1 HCl solution at 60 °C for over 1000 h. Moreover, its oxidation resistance in Fenton reagent at 80 °C surpasses that of commercial membranes. The Li+ recovery ratio from acidic leach liquors of lithium ores can reach ∼99.6 % via the electrodialysis process, demonstrating the membrane as a candidate for lithium extraction in aggressive industrial scenarios.
{"title":"Highly stable cation-exchange membranes for lithium recovery from acidic lithium ore leachate","authors":"Zheng Liu , Qiaoyun Ye , Qian Chen, Liang Ge, Xingya Li, Tongwen Xu","doi":"10.1016/j.advmem.2025.100155","DOIUrl":"10.1016/j.advmem.2025.100155","url":null,"abstract":"<div><div>Electrodialysis technology is widely deployed in the field of separation due to its simplicity of operation and sustainability, where ion-exchange membranes are the most critical components in this process. Traditional cation-exchange membranes are typically suitable for mild conditions and often suffer from issues such as poor stability and susceptibility. In this study, we design a novel cation-exchange membrane featuring a rigid backbone with sulfonic acid groups as side chains and fluorine-containing region. The resultant membrane exhibits high thermal stability, acid resistance, and oxidation resistance, without degradation of functional groups and decline in mechanical strength after treatment in 1 mol L<sup>−1</sup> HCl solution at 60 °C for over 1000 h. Moreover, its oxidation resistance in Fenton reagent at 80 °C surpasses that of commercial membranes. The Li<sup>+</sup> recovery ratio from acidic leach liquors of lithium ores can reach ∼99.6 % via the electrodialysis process, demonstrating the membrane as a candidate for lithium extraction in aggressive industrial scenarios.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100155"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212208","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}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100170
Xing Lv , Xiaoyun Wang , Xing Zhang , Yangming Cheng , Huiqin Zhang , Yong Mei , Xufeng Chen , Ting He , Zhaoliang Cui
The Artificial Womb Technology (AWT) system is a piece of biomedical equipment that supports the in vitro development of extremely premature infants. The system draws fetal blood, oxygenates it, removes carbon dioxide (CO2), and then delivers it back to the fetus. This prevents the fetus from switching to a pulmonary breathing pattern prematurely, which provides critical time for lung tissue development. Researchers have utilized extracorporeal membrane oxygenation (ECMO) technology to provide the fetus with oxygen. In this study, we developed a new method using artificial blood instead of maternal blood in a liquid-liquid dual-circulation. Additionally, since preterm infants require greater blood compatibility and the oxygenated membrane must have anticoagulant properties, the membrane was modified to enhance hemocompatibility and anticoagulant properties. PMP membranes were functionalized with polydopamine (PDA), after which (3-(methacrylamido) propyl) dimethyl (3-thiopropyl) ammonium hydroxide inner salt (SPP) and fondaparinux sodium were successively grafted. Protein adsorption reached 18.3 μg/cm2 (64.3 % reduction), while hemolysis rate dropped to 0.19 % (85.4 % reduction). The results confirm that the functionalized modified membrane not only meets the blood compatibility requirements of the dual-circulation system but also accurately replicates the recurrent process of fetal-maternal gas exchange through its biomimetic design, providing key technical support for the clinical translation of the AWT system.
{"title":"Endothelial bionic-modified anti-thrombotic PMP hollow fiber membranes for dual-circulation artificial uterus system","authors":"Xing Lv , Xiaoyun Wang , Xing Zhang , Yangming Cheng , Huiqin Zhang , Yong Mei , Xufeng Chen , Ting He , Zhaoliang Cui","doi":"10.1016/j.advmem.2025.100170","DOIUrl":"10.1016/j.advmem.2025.100170","url":null,"abstract":"<div><div>The Artificial Womb Technology (AWT) system is a piece of biomedical equipment that supports the in vitro development of extremely premature infants. The system draws fetal blood, oxygenates it, removes carbon dioxide (CO<sub>2</sub>), and then delivers it back to the fetus. This prevents the fetus from switching to a pulmonary breathing pattern prematurely, which provides critical time for lung tissue development. Researchers have utilized extracorporeal membrane oxygenation (ECMO) technology to provide the fetus with oxygen. In this study, we developed a new method using artificial blood instead of maternal blood in a liquid-liquid dual-circulation. Additionally, since preterm infants require greater blood compatibility and the oxygenated membrane must have anticoagulant properties, the membrane was modified to enhance hemocompatibility and anticoagulant properties. PMP membranes were functionalized with polydopamine (PDA), after which (3-(methacrylamido) propyl) dimethyl (3-thiopropyl) ammonium hydroxide inner salt (SPP) and fondaparinux sodium were successively grafted. Protein adsorption reached 18.3 μg/cm<sup>2</sup> (64.3 % reduction), while hemolysis rate dropped to 0.19 % (85.4 % reduction). The results confirm that the functionalized modified membrane not only meets the blood compatibility requirements of the dual-circulation system but also accurately replicates the recurrent process of fetal-maternal gas exchange through its biomimetic design, providing key technical support for the clinical translation of the AWT system.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100170"},"PeriodicalIF":9.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120842","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}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100134
Qin Shen , Mengmeng Fang , Wenshuo Cui , Chuanjie Fang , Zhikan Yao , Liping Zhu
Given the growing demand for lithium in energy storage and electric vehicle industries, the development of acid-resistant membranes for efficient lithium extraction from brine and recycling of spent lithium-ion batteries is crucial for advancing sustainable and scalable resource recovery technologies. Herein, a strong acid-tolerant and positively charged polyurea (PU) nanofiltration (NF) membrane was fabricated via the interfacial polymerization of toluene-2, 4-diisocyanate (TDI) monomers with poly(allylamine) (PAA) monomers with a polyethersulfone ultrafiltration membrane as the substrate. The newly-developed typical PU NF membrane performed high cation-cation separation selectivity (mixed-salt separation factor: 16.6 for Li+/Mg2+, 19.3 for Li+/Ni2+, 11.3 for Li+/Co2+, and 15.7 for Li+/Mn2+) even if exposed to 10 wt% H2SO4 solution for 96 h. The high cation separation accuracy is attributed to the narrow positively-charged ion sieving channels constructed with TDI and PAA as building blocks. The urea units containing abundant bidentate hydrogen bonds and electron-rich dinitrogen atoms is responsible for the excellent acid tolerance of the PU membranes. This work has the potential to contribute to more sustainable and cost-effective lithium recovery from both brine and discarded cathode materials, making it a crucial step toward scaling up these technologies for industrial applications.
{"title":"Robust positively charged polyurea nanofiltration membranes with acid resistance for efficient lithium extraction and recovery","authors":"Qin Shen , Mengmeng Fang , Wenshuo Cui , Chuanjie Fang , Zhikan Yao , Liping Zhu","doi":"10.1016/j.advmem.2025.100134","DOIUrl":"10.1016/j.advmem.2025.100134","url":null,"abstract":"<div><div>Given the growing demand for lithium in energy storage and electric vehicle industries, the development of acid-resistant membranes for efficient lithium extraction from brine and recycling of spent lithium-ion batteries is crucial for advancing sustainable and scalable resource recovery technologies. Herein, a strong acid-tolerant and positively charged polyurea (PU) nanofiltration (NF) membrane was fabricated via the interfacial polymerization of toluene-2, 4-diisocyanate (TDI) monomers with poly(allylamine) (PAA) monomers with a polyethersulfone ultrafiltration membrane as the substrate. The newly-developed typical PU NF membrane performed high cation-cation separation selectivity (mixed-salt separation factor: 16.6 for Li<sup>+</sup>/Mg<sup>2+</sup>, 19.3 for Li<sup>+</sup>/Ni<sup>2+</sup>, 11.3 for Li<sup>+</sup>/Co<sup>2+</sup>, and 15.7 for Li<sup>+</sup>/Mn<sup>2+</sup>) even if exposed to 10 wt% H<sub>2</sub>SO<sub>4</sub> solution for 96 h. The high cation separation accuracy is attributed to the narrow positively-charged ion sieving channels constructed with TDI and PAA as building blocks. The urea units containing abundant bidentate hydrogen bonds and electron-rich dinitrogen atoms is responsible for the excellent acid tolerance of the PU membranes. This work has the potential to contribute to more sustainable and cost-effective lithium recovery from both brine and discarded cathode materials, making it a crucial step toward scaling up these technologies for industrial applications.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100134"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Green hydrogen production via water electrolysis is a crucial pathway for sustainable energy generation. Bipolar membrane water electrolysis (BPMWE) offers several advantages, including kinetically optimal electrode reactions across pH gradients and reduced component costs. However, challenges such as high overpotential of the BPM for water dissociation (WD) and the need for long-term stability in industrial setting hinder BPMWE development. While various metal oxide catalysts have been explored to reduce WD overpotential in BPMs, the effect of different crystalline phases of interfacial catalysts on BPM performance remains poorly understood. In this study, we investigate the catalytic effects of three titanium dioxide (TiO2) phases—anatase, rutile, and amorphous—as interfacial catalysts in BPMs. The electrochemical tests reveal that rutile TiO2, with its uniform dispersion and minimal aggregation, offers excellent WD efficiency. The BPM incorporating rutile TiO2 achieves current densities of 2300 mA cm−2 in pure water electrolysis and 4500 mA cm−2 in acid-base electrolysis at 3 V and 80 °C. Furthermore, in a flow-cell electrolyzer, it sustains stable operation for 200 h at 1000 mA cm−2. This work addresses critical challenges in BPM development, advancing BPMWE technology and supporting the potential for industrial-scale hydrogen production, thereby willing to contribute to the transition to sustainable energy solutions.
水电解绿色制氢是可持续能源生产的重要途径。双极膜电解（BPMWE）具有几个优点，包括跨pH梯度的动力学最佳电极反应和降低组件成本。然而，BPM用于水解离（WD）的高过电位以及工业环境中对长期稳定性的需求等挑战阻碍了BPMWE的发展。虽然已经探索了各种金属氧化物催化剂来降低BPM中的WD过电位，但界面催化剂的不同晶相对BPM性能的影响仍然知之甚少。在这项研究中，我们研究了三种二氧化钛（TiO2）相——锐钛矿、金红石和无定形——作为界面催化剂在bpm中的催化作用。电化学测试表明，金红石型TiO2具有分散均匀、团聚最小的特点，具有优异的WD效率。含金红石型TiO2的BPM在3v和80°C条件下，纯水电解电流密度为2300 mA cm - 2，酸碱电解电流密度为4500 mA cm - 2。此外，在流动电池电解槽中，它可以在1000毫安厘米−2下稳定运行200小时。这项工作解决了BPM开发中的关键挑战，推进了BPMWE技术，并支持了工业规模制氢的潜力，从而愿意为向可持续能源解决方案的过渡做出贡献。
{"title":"Advanced bipolar membranes with earth-abundant water dissociation catalysts for durable ampere-level water electrolysis","authors":"Fanglin Duan, Xiaojiang Li, Fen Luo, Tingkun Li, Weisheng Yu, Liang Wu, Tongwen Xu","doi":"10.1016/j.advmem.2025.100152","DOIUrl":"10.1016/j.advmem.2025.100152","url":null,"abstract":"<div><div>Green hydrogen production via water electrolysis is a crucial pathway for sustainable energy generation. Bipolar membrane water electrolysis (BPMWE) offers several advantages, including kinetically optimal electrode reactions across pH gradients and reduced component costs. However, challenges such as high overpotential of the BPM for water dissociation (WD) and the need for long-term stability in industrial setting hinder BPMWE development. While various metal oxide catalysts have been explored to reduce WD overpotential in BPMs, the effect of different crystalline phases of interfacial catalysts on BPM performance remains poorly understood. In this study, we investigate the catalytic effects of three titanium dioxide (TiO<sub>2</sub>) phases—anatase, rutile, and amorphous—as interfacial catalysts in BPMs. The electrochemical tests reveal that rutile TiO<sub>2</sub>, with its uniform dispersion and minimal aggregation, offers excellent WD efficiency. The BPM incorporating rutile TiO<sub>2</sub> achieves current densities of 2300 mA cm<sup>−2</sup> in pure water electrolysis and 4500 mA cm<sup>−2</sup> in acid-base electrolysis at 3 V and 80 °C. Furthermore, in a flow-cell electrolyzer, it sustains stable operation for 200 h at 1000 mA cm<sup>−2</sup>. This work addresses critical challenges in BPM development, advancing BPMWE technology and supporting the potential for industrial-scale hydrogen production, thereby willing to contribute to the transition to sustainable energy solutions.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100152"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942570","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}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100153
Fuju Qi , Benkun Qi , Zhaoliang Cui , Xiangrong Chen , Yinhua Wan , Jianquan Luo
Cellulose-based separation membranes are promising for sustainable membrane technology due to their renewable raw materials and biodegradability. Their excellent resistance to fouling, minimal protein adsorption, and high biocompatibility render them effective in bio-separation applications. Nevertheless, the development of truly sustainable cellulose membranes for engineering purposes remains challenging. This review begins by outlining the raw cellulosic materials employed in membrane fabrication, followed by a systematic summary of the fabrication techniques for cellulose-based membranes derived from various raw materials, alongside their progress in bio-separation. The sustainability of cellulose-based separation membranes is assessed within a life cycle framework that considers raw materials, membrane fabrication, application scenarios and end-of life, with particular emphasis on key barriers to achieving engineering sustainability. Finally, this review proposes targeted optimization strategies to tackle these limitations, offering a clear roadmap for future research aimed at transforming cellulose-based membranes from promising laboratory innovations into robust, scalable engineering solutions.
{"title":"Cellulose-based separation membranes: A sustainable evolution or fleeting trend?","authors":"Fuju Qi , Benkun Qi , Zhaoliang Cui , Xiangrong Chen , Yinhua Wan , Jianquan Luo","doi":"10.1016/j.advmem.2025.100153","DOIUrl":"10.1016/j.advmem.2025.100153","url":null,"abstract":"<div><div>Cellulose-based separation membranes are promising for sustainable membrane technology due to their renewable raw materials and biodegradability. Their excellent resistance to fouling, minimal protein adsorption, and high biocompatibility render them effective in bio-separation applications. Nevertheless, the development of truly sustainable cellulose membranes for engineering purposes remains challenging. This review begins by outlining the raw cellulosic materials employed in membrane fabrication, followed by a systematic summary of the fabrication techniques for cellulose-based membranes derived from various raw materials, alongside their progress in bio-separation. The sustainability of cellulose-based separation membranes is assessed within a life cycle framework that considers raw materials, membrane fabrication, application scenarios and end-of life, with particular emphasis on key barriers to achieving engineering sustainability. Finally, this review proposes targeted optimization strategies to tackle these limitations, offering a clear roadmap for future research aimed at transforming cellulose-based membranes from promising laboratory innovations into robust, scalable engineering solutions.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100153"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115991","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}
Polyimide (PI) has been widely regarded as an ideal material for high-performance gas separation membranes due to its exceptional mechanical strength, thermal and chemical stability, excellent film-forming properties, and versatile structural tunability. However, practical applications of PI membranes have been limited by challenges such as free volume collapse, physical aging, and high gas transport resistance. These issues are considered to be addressable through the precise regulation of polymer structures via both physical and chemical modification strategies. In this review, the influence of conventional monomer structures on the gas separation performance of PI membranes is examined. Recent advances in modification techniques such as copolymerization, covalent crosslinking, thermal treatment, polymer blending, multilayer composite fabrication, and photo-induced processing are systematically discussed. The structure-property relationships resulting from these modifications are analyzed, with emphasis placed on gas transport mechanisms, as well as the advantages and limitations of each approach. Furthermore, the application potential of PI-derived membranes is highlighted in key areas such as CO2 capture, H2 purification, He enrichment, and light hydrocarbon separation. Through the summarization of current design strategies and performance optimization methods, this review is intended to offer new insights and guidance for the development of next-generation PI-based gas separation membranes.
{"title":"Research progress and challenges in polyimide and polyimide-derived gas separation membranes: A review","authors":"Chuhan Huang , Chengye Zuo , Xianfu Chen , Weihong Xing","doi":"10.1016/j.advmem.2025.100154","DOIUrl":"10.1016/j.advmem.2025.100154","url":null,"abstract":"<div><div>Polyimide (PI) has been widely regarded as an ideal material for high-performance gas separation membranes due to its exceptional mechanical strength, thermal and chemical stability, excellent film-forming properties, and versatile structural tunability. However, practical applications of PI membranes have been limited by challenges such as free volume collapse, physical aging, and high gas transport resistance. These issues are considered to be addressable through the precise regulation of polymer structures via both physical and chemical modification strategies. In this review, the influence of conventional monomer structures on the gas separation performance of PI membranes is examined. Recent advances in modification techniques such as copolymerization, covalent crosslinking, thermal treatment, polymer blending, multilayer composite fabrication, and photo-induced processing are systematically discussed. The structure-property relationships resulting from these modifications are analyzed, with emphasis placed on gas transport mechanisms, as well as the advantages and limitations of each approach. Furthermore, the application potential of PI-derived membranes is highlighted in key areas such as CO<sub>2</sub> capture, H<sub>2</sub> purification, He enrichment, and light hydrocarbon separation. Through the summarization of current design strategies and performance optimization methods, this review is intended to offer new insights and guidance for the development of next-generation PI-based gas separation membranes.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100154"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212209","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}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100149
Ida Sriyanti , Muhammad Rama Almafie , Meutia Kamilatun Nuha Ap Idjan , Rahma Dani , Indah Solihah , Edi Syafri , Yulianti , Leni Marlina
Face masks are designed to protect the wearer from environmental hazards, such as volatile organic contaminants and suspended particulate matter (PM), which can cause asthma and anemia and affect the nervous system. This paper reports the development of a novel electrospun nanofiber membrane composite based on polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), and Piper betle extract (PLE) for potential applications in medical masks. Nanofiber membranes were fabricated via electrospinning and characterized for their physicochemical properties, antibacterial activity, and air filtration performance. SEM analysis revealed a bead-free nanofiber morphology with average diameters ranging from to 764–856 nm. The composite membranes exhibited high tensile strength over 34.92 ± 1.34 MPa, elongation at break of 1.24 % ± 0.031, and Young's modulus of 28.07 ± 1.33 MPa. Water contact angle measurements above 90° indicate the hydrophobic nature of the material. FTIR analysis confirmed the presence of phenolic compounds on the nanofiber surface, suggesting the incorporation of flavonoids, tannins, essential oils, alkaloids, and catechins from the PLE. The nanofiber membranes demonstrated effective antibacterial activity against S. aureus and P. aeruginosa, with inhibition zones of 19.65 ± 0.07 and 7.19 ± 0.08 mm, respectively, for the membrane with the highest PLE content. Air filtration tests revealed that the optimized membrane achieved a high filtration efficiency of 99.11 %, with a relatively low pressure drop of 80.28 Pa and a high-quality factor of 0.1428 Pa−1. The enhanced filtration properties and low filtration resistance of the PVDF/PAN/PLE electrospun membranes demonstrated their potential for the efficient removal of particulate matter and microorganisms in air filtration applications, particularly in the development of high-performance and multifunctional medical masks.
{"title":"Electrospun nanofiber membrane of Piper beetle loaded PVDF/PAN for medical mask applications: psychochemical characteristics, antibacterial and air filter test","authors":"Ida Sriyanti , Muhammad Rama Almafie , Meutia Kamilatun Nuha Ap Idjan , Rahma Dani , Indah Solihah , Edi Syafri , Yulianti , Leni Marlina","doi":"10.1016/j.advmem.2025.100149","DOIUrl":"10.1016/j.advmem.2025.100149","url":null,"abstract":"<div><div>Face masks are designed to protect the wearer from environmental hazards, such as volatile organic contaminants and suspended particulate matter (PM), which can cause asthma and anemia and affect the nervous system. This paper reports the development of a novel electrospun nanofiber membrane composite based on polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), and Piper betle extract (PLE) for potential applications in medical masks. Nanofiber membranes were fabricated via electrospinning and characterized for their physicochemical properties, antibacterial activity, and air filtration performance. SEM analysis revealed a bead-free nanofiber morphology with average diameters ranging from to 764–856 nm. The composite membranes exhibited high tensile strength over 34.92 ± 1.34 MPa, elongation at break of 1.24 % ± 0.031, and Young's modulus of 28.07 ± 1.33 MPa. Water contact angle measurements above 90° indicate the hydrophobic nature of the material. FTIR analysis confirmed the presence of phenolic compounds on the nanofiber surface, suggesting the incorporation of flavonoids, tannins, essential oils, alkaloids, and catechins from the PLE. The nanofiber membranes demonstrated effective antibacterial activity against <em>S. aureus</em> and <em>P. aeruginosa</em>, with inhibition zones of 19.65 ± 0.07 and 7.19 ± 0.08 mm, respectively, for the membrane with the highest PLE content. Air filtration tests revealed that the optimized membrane achieved a high filtration efficiency of 99.11 %, with a relatively low pressure drop of 80.28 Pa and a high-quality factor of 0.1428 Pa<sup>−1</sup>. The enhanced filtration properties and low filtration resistance of the PVDF/PAN/PLE electrospun membranes demonstrated their potential for the efficient removal of particulate matter and microorganisms in air filtration applications, particularly in the development of high-performance and multifunctional medical masks.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100149"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941812","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}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100171
Mehrdad Shariatifar , Farhang Pazanialenjareghi , Haiqing Lin
This study presents an innovative method to accurately predict CO2 permeability and the selectivity of CO2/N2, CO2/CH4, and CO2/H2 in mixed matrix membranes (MMMs) containing polymers and two-dimensional (2D) nanoparticles. A number of neural network models were used to examine the connection between six input variables (feed pressure, polymer type, filler content, 2D filler, additive type, and modification process) and two output variables (permeability and selectivity). The proposed method was tested on different neural network architectures using measurements like Mean Absolute Error (MAE) and Correlation Coefficient (R2). The neural network models were constructed with one, two, and three hidden layers, each containing a variation of neurons. These findings indicate the existence of a workable model that effectively mitigates bothunderfitting and overfitting occurrences. Another test on the suggested neural network model showed that the type of polymers, the amount of fillers, and the feed pressure had the most significant impact on gas permeability and selectivity. The proposed approach holds significant promise for predicting gas transport properties while minimizing the need for substantial time and financial resources.
{"title":"Artificial neural networks to correlate structure and CO2 separation performance of mixed matrix membranes containing 2D fillers","authors":"Mehrdad Shariatifar , Farhang Pazanialenjareghi , Haiqing Lin","doi":"10.1016/j.advmem.2025.100171","DOIUrl":"10.1016/j.advmem.2025.100171","url":null,"abstract":"<div><div>This study presents an innovative method to accurately predict CO<sub>2</sub> permeability and the selectivity of CO<sub>2</sub>/N<sub>2</sub>, CO<sub>2</sub>/CH<sub>4</sub>, and CO<sub>2</sub>/H<sub>2</sub> in mixed matrix membranes (MMMs) containing polymers and two-dimensional (2D) nanoparticles. A number of neural network models were used to examine the connection between six input variables (feed pressure, polymer type, filler content, 2D filler, additive type, and modification process) and two output variables (permeability and selectivity). The proposed method was tested on different neural network architectures using measurements like Mean Absolute Error (MAE) and Correlation Coefficient (R<sup>2</sup>). The neural network models were constructed with one, two, and three hidden layers, each containing a variation of neurons. These findings indicate the existence of a workable model that effectively mitigates bothunderfitting and overfitting occurrences. Another test on the suggested neural network model showed that the type of polymers, the amount of fillers, and the feed pressure had the most significant impact on gas permeability and selectivity. The proposed approach holds significant promise for predicting gas transport properties while minimizing the need for substantial time and financial resources.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100171"},"PeriodicalIF":9.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095256","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号