Advanced Membranes最新文献

英文中文

Membranes with hollow bowl-shaped window for CO2 removal from natural gas

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100129

Weiwang Lim , Wen He , Ji Ma , Shabi Ul Hassan , Jingcheng Du , Qian Sun , Dong Cao , Jian Guan , Hongjun Zhang , Jiangtao Liu

Mixed matrix membranes (MMMs) are crucial for CO₂ separation and offer a potential solution to overcome conventional gas separation. Nevertheless, MMMs face challenges due to interfacial defects in membranes, which results in poor gas separation performance. In this study, γ-cyclodextrin (γ-CD) based MMMs were synthesized via a simple solution casting method. γ-CD could be molecularly dispersed in Matrimid matrix up to 3 wt% loading without defects at the interfaces in membranes. ATR-FTIR results showed that γ-CD based MMMs have significant peak with loading increases. Leveraging the high CO₂ solubility and high porosity of γ-CD, Matrimid/γ-CD based membranes exhibit improved CO₂/CH₄ selectivity. Especially, the CO₂ permeability of Matrimid-3%-CD membrane increased by 40 % (from 13.35 to 18.71 Barrer) and CO₂/CH₄ increased by 99 % (from 36.08 to 71.96), respectively compared to pristine Matrimid membrane. This demonstrates that the incorporation of γ-CD in Matrimid membrane significantly improves both permeability and selectivity. The Matrimid-γ-CD membrane also demonstrated superior long-term operation stability after aging 593 days. Thus, this study lays the foundation for the development of γ-CD-based membranes with high CO₂/CH₄ selectivity, providing potential pathways for CO₂ separation processes in CO₂/CH₄ separation.

{"title":"Membranes with hollow bowl-shaped window for CO2 removal from natural gas","authors":"Weiwang Lim , Wen He , Ji Ma , Shabi Ul Hassan , Jingcheng Du , Qian Sun , Dong Cao , Jian Guan , Hongjun Zhang , Jiangtao Liu","doi":"10.1016/j.advmem.2025.100129","DOIUrl":"10.1016/j.advmem.2025.100129","url":null,"abstract":"<div><div>Mixed matrix membranes (MMMs) are crucial for CO<sub>2</sub> separation and offer a potential solution to overcome conventional gas separation. Nevertheless, MMMs face challenges due to interfacial defects in membranes, which results in poor gas separation performance. In this study, γ-cyclodextrin (γ-CD) based MMMs were synthesized via a simple solution casting method. γ-CD could be molecularly dispersed in Matrimid matrix up to 3 wt% loading without defects at the interfaces in membranes. ATR-FTIR results showed that γ-CD based MMMs have significant peak with loading increases. Leveraging the high CO<sub>2</sub> solubility and high porosity of γ-CD, Matrimid/γ-CD based membranes exhibit improved CO<sub>2</sub>/CH<sub>4</sub> selectivity. Especially, the CO<sub>2</sub> permeability of Matrimid-3%-CD membrane increased by 40 % (from 13.35 to 18.71 Barrer) and CO<sub>2</sub>/CH<sub>4</sub> increased by 99 % (from 36.08 to 71.96), respectively compared to pristine Matrimid membrane. This demonstrates that the incorporation of γ-CD in Matrimid membrane significantly improves both permeability and selectivity. The Matrimid-γ-CD membrane also demonstrated superior long-term operation stability after aging 593 days. Thus, this study lays the foundation for the development of γ-CD-based membranes with high CO<sub>2</sub>/CH<sub>4</sub> selectivity, providing potential pathways for CO<sub>2</sub> separation processes in CO<sub>2</sub>/CH<sub>4</sub> separation.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100129"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099935","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}

引用次数: 0

Preparation of high-performance pervaporation membranes for ethanol dehydration using a layer-by-layer self-assembly method

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100132

Zhenhan Sun , Guoke Zhao , Gongqing Tang , Zhihu Zhao , Pei Li

To achieve fuel-grade purity (≥99.5 wt%), raw bioethanol needs to be purified. Adopting pervaporation membrane for bioethanol enrichment can greatly reduce the energy consumption compared with distillation. However, this requires the membrane having a high flux and high water to ethanol selectivity as well as good stability. In this study, a layer-by-layer self-assembled composite pervaporation membrane was prepared by alternately dip-coating polyallylamine hydrochloride (PAH) and sodium alginate (SA) solutions on the surface of a polyacrylonitrile (PAN) microfiltration membrane. The membrane flux and separation performance under different feed conditions are measured independently, and the results are mutually independent. These tests are conducted as short-term experiments to evaluate the membrane's separation performance under specific feed conditions. By optimizing the concentrations of PAH and SA, best separation performance of the composite membranes was obtained with a flux of 2.02 kg m⁻² h⁻¹ and a water to ethanol separation factor of 10993 using a 90 % ethanol water solution as feed at 70 °C. The composite membrane showed good stability in water. When keeping all other conditions unchanged, the feed ethanol concentration is adjusted to 50 wt%, the membrane flux increase to 12.61 kg m⁻² h⁻¹, and the water concentration in the permeate reach 99.7743 wt%.

{"title":"Preparation of high-performance pervaporation membranes for ethanol dehydration using a layer-by-layer self-assembly method","authors":"Zhenhan Sun , Guoke Zhao , Gongqing Tang , Zhihu Zhao , Pei Li","doi":"10.1016/j.advmem.2025.100132","DOIUrl":"10.1016/j.advmem.2025.100132","url":null,"abstract":"<div><div>To achieve fuel-grade purity (≥99.5 wt%), raw bioethanol needs to be purified. Adopting pervaporation membrane for bioethanol enrichment can greatly reduce the energy consumption compared with distillation. However, this requires the membrane having a high flux and high water to ethanol selectivity as well as good stability. In this study, a layer-by-layer self-assembled composite pervaporation membrane was prepared by alternately dip-coating polyallylamine hydrochloride (PAH) and sodium alginate (SA) solutions on the surface of a polyacrylonitrile (PAN) microfiltration membrane. The membrane flux and separation performance under different feed conditions are measured independently, and the results are mutually independent. These tests are conducted as short-term experiments to evaluate the membrane's separation performance under specific feed conditions. By optimizing the concentrations of PAH and SA, best separation performance of the composite membranes was obtained with a flux of 2.02 kg m<sup>−2</sup> h<sup>−1</sup> and a water to ethanol separation factor of 10993 using a 90 % ethanol water solution as feed at 70 °C. The composite membrane showed good stability in water. When keeping all other conditions unchanged, the feed ethanol concentration is adjusted to 50 wt%, the membrane flux increase to 12.61 kg m⁻<sup>2</sup> h⁻<sup>1</sup>, and the water concentration in the permeate reach 99.7743 wt%.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100132"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402573","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}

引用次数: 0

Size effect of porous filler in mixed matrix membranes for faster hydrogen permeation from methane-containing mixtures

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100136

Yuebing Shen , Fanfan Jiang , Qian Liu , Zhiquan Chen , Kai Ge , Junfeng Bai , Jingui Duan

One potential solution for the transport of hydrogen (H₂) is the injection of hydrogen into natural gas pipelines. Therefore, it is imperative to develop an efficient purification technology. Membrane separation has great potential to meet this challenge due to its effective energy consumption and cost. Here, a series of mixed matrix membranes (MMMs) containing ZIF-71 fillers of different sizes are reported for faster H₂ permeation. The uniform distribution of nanosized ZIF-71 (0.1 μm) in 6FDA-DAM provides an attractive diffusion channel, allowing the membrane to show rapid H₂ permeation of 1050 Barrer and good H₂/CH₄ separation factor of 43. This performance is markedly superior to that of the larger-sized ZIF-71 (1.0 μm and 3.5 μm) in 6FDA-DAM and the same-sized ZIF-71 (0.1 μm) in 6FDA-Durene and PEI, and also exceeds the upper bound. Moreover, the long-term stable H₂/CH₄ separation suggests a high potential for practical applications. The findings here demonstrate the importance of the filler size, which has a strong influence on the formation of mass transfer channels, and also provide straightforward method for the development of high-performance MMMs.

{"title":"Size effect of porous filler in mixed matrix membranes for faster hydrogen permeation from methane-containing mixtures","authors":"Yuebing Shen , Fanfan Jiang , Qian Liu , Zhiquan Chen , Kai Ge , Junfeng Bai , Jingui Duan","doi":"10.1016/j.advmem.2025.100136","DOIUrl":"10.1016/j.advmem.2025.100136","url":null,"abstract":"<div><div>One potential solution for the transport of hydrogen (H<sub>2</sub>) is the injection of hydrogen into natural gas pipelines. Therefore, it is imperative to develop an efficient purification technology. Membrane separation has great potential to meet this challenge due to its effective energy consumption and cost. Here, a series of mixed matrix membranes (MMMs) containing ZIF-71 fillers of different sizes are reported for faster H<sub>2</sub> permeation. The uniform distribution of nanosized ZIF-71 (0.1 μm) in 6FDA-DAM provides an attractive diffusion channel, allowing the membrane to show rapid H<sub>2</sub> permeation of 1050 Barrer and good H<sub>2</sub>/CH<sub>4</sub> separation factor of 43. This performance is markedly superior to that of the larger-sized ZIF-71 (1.0 μm and 3.5 μm) in 6FDA-DAM and the same-sized ZIF-71 (0.1 μm) in 6FDA-Durene and PEI, and also exceeds the upper bound. Moreover, the long-term stable H<sub>2</sub>/CH<sub>4</sub> separation suggests a high potential for practical applications. The findings here demonstrate the importance of the filler size, which has a strong influence on the formation of mass transfer channels, and also provide straightforward method for the development of high-performance MMMs.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100136"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488712","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}

引用次数: 0

Incorporating polyvinylpyrrolidone modified HOF-101 into Pebax membranes for efficient toluene/N2 separation

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100127

Jiating Liu , Jiashuai Zhao , Yuhan Wang , Mengqi Bie , Yuhang Guo , Yanxiong Ren , Ming Xue , Chuanruo Yang , Fusheng Pan , Taotao Gao , Zhongyi Jiang

Hybrid membranes hold great promise in the recovery of volatile organic compounds (VOCs). Hydrogen-bonded organic framework (HOF), a class of hydrogen-bonded crystalline porous materials with high affinity toward VOCs, holds great potential as an emerging filler. In this study, highly stable HOF-101 modified by Polyvinylpyrrolidone (PVP) and introduced into polyether block amide (Pebax®1657) to prepare hybrid membrane. The π-conjugated large aromatic ring structure of HOF-101 promoted the adsorption of toluene molecules. The interaction between the Pebax polymer chain segments and PVP on the modified HOF-101 surface enhanced their interfacial compatibility. At a PVP@HOF-101 content of 1 wt%, the hybrid membrane exhibited optimal separation performance for a 2.2 mol% toluene/N₂ mixture, with a permeability of 1.51 × 10⁻⁶ mol μm m⁻² s⁻¹ Pa⁻¹ for toluene, a selectivity of 954 and excellent stability over 120 h in the long-term experiment. This study demonstrates the application of HOF-based hybrid membranes for VOCs recovery.

{"title":"Incorporating polyvinylpyrrolidone modified HOF-101 into Pebax membranes for efficient toluene/N2 separation","authors":"Jiating Liu , Jiashuai Zhao , Yuhan Wang , Mengqi Bie , Yuhang Guo , Yanxiong Ren , Ming Xue , Chuanruo Yang , Fusheng Pan , Taotao Gao , Zhongyi Jiang","doi":"10.1016/j.advmem.2025.100127","DOIUrl":"10.1016/j.advmem.2025.100127","url":null,"abstract":"<div><div>Hybrid membranes hold great promise in the recovery of volatile organic compounds (VOCs). Hydrogen-bonded organic framework (HOF), a class of hydrogen-bonded crystalline porous materials with high affinity toward VOCs, holds great potential as an emerging filler. In this study, highly stable HOF-101 modified by Polyvinylpyrrolidone (PVP) and introduced into polyether block amide (Pebax®1657) to prepare hybrid membrane. The π-conjugated large aromatic ring structure of HOF-101 promoted the adsorption of toluene molecules. The interaction between the Pebax polymer chain segments and PVP on the modified HOF-101 surface enhanced their interfacial compatibility. At a PVP@HOF-101 content of 1 wt%, the hybrid membrane exhibited optimal separation performance for a 2.2 mol% toluene/N<sub>2</sub> mixture, with a permeability of 1.51 × 10<sup>−6</sup> mol μm m<sup>−2</sup> s<sup>−1</sup> Pa<sup>−1</sup> for toluene, a selectivity of 954 and excellent stability over 120 h in the long-term experiment. This study demonstrates the application of HOF-based hybrid membranes for VOCs recovery.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099932","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}

引用次数: 0

Hybrid energy harvesting enabled by a covalent organic framework membrane

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100130

Jiaming Yi, Zhuozhi Lai, Qing Guo, Zhiwei Xing, Qi Sun

The integration of water and thermal energy harvesting presents a promising solution to the intermittency issues associated with individual energy sources. In this study, we show a covalent organic framework (COF) membrane featuring subnanometer, one-dimensional ionic channels, which demonstrate remarkable stability in both acidic and saline environments. The membrane exhibits exceptional permselectivity across various electrolyte solutions, enabling efficient osmotic energy harvesting from proton gradients via reverse electrodialysis. Under a 50-fold concentration gradient of H₂SO₄, the membrane achieved a peak output power density of 97.1 W m⁻². Furthermore, the membrane facilitates thermo-osmotic energy conversion by selectively screening ionic charges driven by combined salinity and temperature gradients. Under simulated estuarine salinity conditions and a 30 K temperature gradient, the COF membrane achieved a maximum output power density of 91.4 W m⁻²—an 18-fold increase compared to the commercial benchmark (5 W m⁻²). This study underscores the significant potential of COF membranes for efficient energy conversion, enabling the effective harvesting of untapped osmotic and low-grade heat energy.

{"title":"Hybrid energy harvesting enabled by a covalent organic framework membrane","authors":"Jiaming Yi, Zhuozhi Lai, Qing Guo, Zhiwei Xing, Qi Sun","doi":"10.1016/j.advmem.2025.100130","DOIUrl":"10.1016/j.advmem.2025.100130","url":null,"abstract":"<div><div>The integration of water and thermal energy harvesting presents a promising solution to the intermittency issues associated with individual energy sources. In this study, we show a covalent organic framework (COF) membrane featuring subnanometer, one-dimensional ionic channels, which demonstrate remarkable stability in both acidic and saline environments. The membrane exhibits exceptional permselectivity across various electrolyte solutions, enabling efficient osmotic energy harvesting from proton gradients via reverse electrodialysis. Under a 50-fold concentration gradient of H<sub>2</sub>SO<sub>4</sub>, the membrane achieved a peak output power density of 97.1 W m<sup>−2</sup>. Furthermore, the membrane facilitates thermo-osmotic energy conversion by selectively screening ionic charges driven by combined salinity and temperature gradients. Under simulated estuarine salinity conditions and a 30 K temperature gradient, the COF membrane achieved a maximum output power density of 91.4 W m<sup>−2</sup>—an 18-fold increase compared to the commercial benchmark (5 W m<sup>−2</sup>). This study underscores the significant potential of COF membranes for efficient energy conversion, enabling the effective harvesting of untapped osmotic and low-grade heat energy.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156620","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}

引用次数: 0

Endowing the nanostructured ion channels of anion conductive membranes with negative charge to boost the Cl−/SO42− ion separation via electrodialysis

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100128

Wenlong Ding , Haoyu Liu , Jiayi Liao , Tongtong Wang , Dongze Li , Yu Xu , Shiyu Zhou , Zhiqiang Wu , Wenhui Shi , Jiangnan Shen , Junbin Liao

Construction of homogeneous polymer ion-exchange membranes (IEMs) with suitable ion transport channels and stable structures is crucial to the separation of mono-/multi-valent anions. Amphoteric ion-exchange membrane (AIEM) is a special type of IEM that possesses unique properties due to the presence of both anion exchange groups and cation exchange groups. In this work, we have grafted 1-bromoheptane and 3-bromopropanesulfonate onto the poly(aryl ether sulfone) chain through nucleophilic substitution reactions. Unlike the IEM attaching different ion-change functional groups onto one side-chain, this kind of AIEM bears two kinds of ion-change functional groups on dual side-chains. The results show that the as-prepared AIEMs could maintain low water absorption (<20 %) and swelling ratios (<11 %). The optimal surface area resistance is 6.31 Ω∙cm². The perm-selectivity (Cl⁻/SO₄²⁻) of the optimized PAES-TA/BS-0.85 AIEMs in a binary mixed solution system at 2.5 mA∙cm² could be achieved as high as 67.46, which is much higher than commercial ACS IEMs under the same conditions. Small Angle X-ray scattering reveals a distinct phase separation pattern within the AIEM matrix, which is due to the introduction of sulfonates to increase the hydrophilicity of the side-chains. The combined effects of pore size screening and electrostatic repulsion render the high selectivity of as-prepared AIEMs.

{"title":"Endowing the nanostructured ion channels of anion conductive membranes with negative charge to boost the Cl−/SO42− ion separation via electrodialysis","authors":"Wenlong Ding , Haoyu Liu , Jiayi Liao , Tongtong Wang , Dongze Li , Yu Xu , Shiyu Zhou , Zhiqiang Wu , Wenhui Shi , Jiangnan Shen , Junbin Liao","doi":"10.1016/j.advmem.2025.100128","DOIUrl":"10.1016/j.advmem.2025.100128","url":null,"abstract":"<div><div>Construction of homogeneous polymer ion-exchange membranes (IEMs) with suitable ion transport channels and stable structures is crucial to the separation of mono-/multi-valent anions. Amphoteric ion-exchange membrane (AIEM) is a special type of IEM that possesses unique properties due to the presence of both anion exchange groups and cation exchange groups. In this work, we have grafted 1-bromoheptane and 3-bromopropanesulfonate onto the poly(aryl ether sulfone) chain through nucleophilic substitution reactions. Unlike the IEM attaching different ion-change functional groups onto one side-chain, this kind of AIEM bears two kinds of ion-change functional groups on dual side-chains. The results show that the as-prepared AIEMs could maintain low water absorption (<20 %) and swelling ratios (<11 %). The optimal surface area resistance is 6.31 Ω∙cm<sup>2</sup>. The perm-selectivity (Cl<sup>−</sup>/SO<sub>4</sub><sup>2−</sup>) of the optimized PAES-TA/BS-0.85 AIEMs in a binary mixed solution system at 2.5 mA∙cm<sup>2</sup> could be achieved as high as 67.46, which is much higher than commercial ACS IEMs under the same conditions. Small Angle X-ray scattering reveals a distinct phase separation pattern within the AIEM matrix, which is due to the introduction of sulfonates to increase the hydrophilicity of the side-chains. The combined effects of pore size screening and electrostatic repulsion render the high selectivity of as-prepared AIEMs.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100128"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156621","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}

引用次数: 0

Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2024.100112

Yanqing Xu , Jiaqi Xiong , Chenfei Lin , Yixiang Yu , Qite Qiu , Junbin Liao , Huimin Ruan , Arcadio Sotto , Jiangnan Shen

Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organic frameworks (COFs) offer ordered porous structures for enhanced molecular selectivity. We synthesized composite COFs membranes with triphenylamine derivatives through interfacial polymerization, adjusting pore channel functional groups to achieve high water permeance and size-selective molecule retention. The TFB-OMe-TAPA COFs membrane demonstrated sharp rejection profiles, separating solutes of different molecular sizes. A three-stage cascade process was used to fractionate binary molecules with varying charges, achieving a separation factor of 26.7 for heterogeneous charge molecules. This work reveals the selectivity of COF membranes in near-molecular-weight systems, expanding their potential in molecular separations.

{"title":"Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity","authors":"Yanqing Xu , Jiaqi Xiong , Chenfei Lin , Yixiang Yu , Qite Qiu , Junbin Liao , Huimin Ruan , Arcadio Sotto , Jiangnan Shen","doi":"10.1016/j.advmem.2024.100112","DOIUrl":"10.1016/j.advmem.2024.100112","url":null,"abstract":"<div><div>Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organic frameworks (COFs) offer ordered porous structures for enhanced molecular selectivity. We synthesized composite COFs membranes with triphenylamine derivatives through interfacial polymerization, adjusting pore channel functional groups to achieve high water permeance and size-selective molecule retention. The TFB-OMe-TAPA COFs membrane demonstrated sharp rejection profiles, separating solutes of different molecular sizes. A three-stage cascade process was used to fractionate binary molecules with varying charges, achieving a separation factor of 26.7 for heterogeneous charge molecules. This work reveals the selectivity of COF membranes in near-molecular-weight systems, expanding their potential in molecular separations.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100112"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099934","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}

引用次数: 0

Porous organic cage separation membranes: Exploratory journey from preparation to application

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2024.100125

Zhihao Song , Ying Wang , Zhiyuan Zha , Zhi Wang , Song Zhao

Porous organic cages (POCs) represent a novel class of low-density crystalline materials that exhibit distinctive pores comparable to those observed in three-dimensional extended network materials, including metal organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs). Owing to their adjustable pore sizes, high specific surface areas, and discrete molecular structures, POCs exhibit excellent solution dispersibility and processability, thereby providing a broad spectrum of potential strategies for the design and fabrication of POC separation membranes. This review presents a comprehensive and systematic summary of the recent research progress in the preparation techniques and applications of POC separation membranes. We summarize a comprehensive overview of preparation strategies for POC separation membranes, including physical blending, spin coating, and interfacial polymerization, and analyze their advantages and limitations. Recent developments in the separation applications of POC separation membranes are highlighted, such as gas separation, ion separation and molecular separation, as well as current challenges and future development trends in this field, are briefly discussed. We anticipate that this review will offer a pertinent perspective to promote advancements in the development of advanced POC separation membranes, and be useful to researchers in related fields.

{"title":"Porous organic cage separation membranes: Exploratory journey from preparation to application","authors":"Zhihao Song , Ying Wang , Zhiyuan Zha , Zhi Wang , Song Zhao","doi":"10.1016/j.advmem.2024.100125","DOIUrl":"10.1016/j.advmem.2024.100125","url":null,"abstract":"<div><div>Porous organic cages (POCs) represent a novel class of low-density crystalline materials that exhibit distinctive pores comparable to those observed in three-dimensional extended network materials, including metal organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs). Owing to their adjustable pore sizes, high specific surface areas, and discrete molecular structures, POCs exhibit excellent solution dispersibility and processability, thereby providing a broad spectrum of potential strategies for the design and fabrication of POC separation membranes. This review presents a comprehensive and systematic summary of the recent research progress in the preparation techniques and applications of POC separation membranes. We summarize a comprehensive overview of preparation strategies for POC separation membranes, including physical blending, spin coating, and interfacial polymerization, and analyze their advantages and limitations. Recent developments in the separation applications of POC separation membranes are highlighted, such as gas separation, ion separation and molecular separation, as well as current challenges and future development trends in this field, are briefly discussed. We anticipate that this review will offer a pertinent perspective to promote advancements in the development of advanced POC separation membranes, and be useful to researchers in related fields.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100125"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100004","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}

引用次数: 0

Sandwich-like composite membrane for advanced radiative cooling applications

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100133

Wuyi Liu , Qing Tian , Yuyi Wang , Liu Yang , Dan Lu , Zhikan Yao , Lin Zhang

Passive daytime radiative cooling (PDRC) offers an energy-efficient method of cooling by reflecting sunlight and emitting heat to the cold outer space through the atmospheric transparent window (ATW). For optimal performance, radiative coolers require high reflectance in the solar spectrum to minimize solar heat absorption and near-unity emissivity in the ATW to maximize heat dissipation. Here, we present a scalable composite radiative cooling membrane (cRCM) composed of a hierarchically porous polysulfone (PSF) layer, sandwiched between two flexible polydimethyl-siloxane (PDMS) layers. The PSF layer, fabricated using a simple non-solvent induced phase separation (NIPS) method, exhibits a high solar reflectance of 98.2 % across wavelengths of 0.3–2.5 μm owing to its high refractive index of 1.64. The PDMS layers, attached on both sides of the PSF membrane via roll-to-roll lamination, offer excellent mid-infrared (MIR) emissivity of 94.2 % across wavelengths of 2.5–20 μm. Under midday conditions, the membrane achieves an average temperature reduction of 5.0 °C below ambient air temperature, with a theoretical cooling power of 114 W/m². Year-round simulations indicate significant cooling energy saving in warm and tropical regions. The new membrane represents a significant advance in PDRC technology, offering promising applications in energy-efficient cooling systems.

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引用次数: 0

Preparation of COF-based membranes via chiral induction for efficient enantioselective resolution

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2024.100113

Fanmengjing Wang , Yizhihao Lu , Kaiqiang He , Philip J. Marriott , Matthew R. Hill , Huanting Wang

Efficient chiral resolution is highly important in the food, pharmaceutical and agriculture industries because of the distinctive biological or pharmaceutical properties of enantiomers. Membrane-assisted chiral separation, which has the potential advantages of low cost and high yield, has attracted significant research attention, but the fabrication of high-quality chiral membranes displaying both high selectivity and high flux of enantiomers is still a challenge. Covalent organic frameworks (COFs), a class of porous materials with high porosity and diverse functionalities, are promising for the development of high-performance chiral separation membranes; however, these materials have yet to be developed. In this work, we demonstrated the in situ growth of a chiral TpPa-1 (cTpPa-1) membrane on polymer substrates via chiral induction. The resulting cTpPa-1@PAN membrane displayed a maximum enantioselectivity of 99.3 % ee for resolving limonene racemates with a flux of 5.5 mmol m⁻² h⁻¹. Furthermore, the effects of feed solvent polarity on membrane performance, the versatility of cTpPa-1 for making chiral composite membranes, and the mechanisms associated with cTpPa-1-based membranes were studied and are discussed.

{"title":"Preparation of COF-based membranes via chiral induction for efficient enantioselective resolution","authors":"Fanmengjing Wang , Yizhihao Lu , Kaiqiang He , Philip J. Marriott , Matthew R. Hill , Huanting Wang","doi":"10.1016/j.advmem.2024.100113","DOIUrl":"10.1016/j.advmem.2024.100113","url":null,"abstract":"<div><div>Efficient chiral resolution is highly important in the food, pharmaceutical and agriculture industries because of the distinctive biological or pharmaceutical properties of enantiomers. Membrane-assisted chiral separation, which has the potential advantages of low cost and high yield, has attracted significant research attention, but the fabrication of high-quality chiral membranes displaying both high selectivity and high flux of enantiomers is still a challenge. Covalent organic frameworks (COFs), a class of porous materials with high porosity and diverse functionalities, are promising for the development of high-performance chiral separation membranes; however, these materials have yet to be developed. In this work, we demonstrated the in situ growth of a chiral TpPa-1 (cTpPa-1) membrane on polymer substrates via chiral induction. The resulting cTpPa-1@PAN membrane displayed a maximum enantioselectivity of 99.3 % <em>ee</em> for resolving limonene racemates with a flux of 5.5 mmol m<sup>−2</sup> h<sup>−1</sup>. Furthermore, the effects of feed solvent polarity on membrane performance, the versatility of cTpPa-1 for making chiral composite membranes, and the mechanisms associated with cTpPa-1-based membranes were studied and are discussed.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100113"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099933","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}

引用次数: 0

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