Article
Engineering, Chemical
Zhun Li, Zhifu Guan, Chunyang Wang, Bo Quan, Lianhua Zhao
Summary: The research showed that sHMO composite membrane has lower IL retention capacity but still contributes to the conductivity of the membrane, providing the possibility for the use of anhydrous composite membrane in PEMFCs under medium temperature condition.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
M. Raja Pugalenthi, Konlayutt Punyawudho, M. Anbu Arasi, A. A. Shah, M. Ramesh Prabhu, M. Kouthaman, K. Velsankar, R. Gayathri
Summary: The electrospinning approach is used to fabricate dense continuous sulfonated poly (ether ether ketone) nanofiber mat, which is then impregnated with SPEEK solution to construct pore filled composite membranes for proton exchange membranes fuel cells. The suitable control of voltage, viscosity, flow rate, and collector distance is critical for obtaining a uniform dense fiber structure without bead formation. The embedded nanofibers improve the properties of the composite membranes, indicating their potential as materials for PEMFC.
Article
Engineering, Chemical
Dong Huang, Xi Li, Chen Luo, Peng Wei, Yang Sui, Jihong Wen, Chuanbo Cong, Xiaocan Zhang, Xiaoyu Meng, Qiong Zhou
Summary: In this study, a sandwich structure composite membrane was proposed to achieve balanced proton conductivity, dimensional stability, and high long-term durability. The incorporation of hybrid nanofibers into the membrane enhanced its dimensional stability, while the acid-base interaction between different functional groups improved the proton conductivity. The composite membrane displayed enhanced stress, optimal proton conductivity, and excellent fuel cell performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Xuan Li, Bo He, Ping Li, Shaokun Tang
Summary: In this study, a series of Schiff-base networks (SNWs) with different contents were in situ synthesized in the SPEEK membrane, and then the composite membranes were soaked in sulfonic acid for improved proton conductivity. The proton conductivity of the SPEEK/S-SNW-15 composite membrane can reach 115.53 mS cm(-1) at 80 degrees C and 100% RH, while also exhibiting satisfactory stability and mechanical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Environmental Sciences
D. Vidhyeswari, A. Surendhar, S. Bhuvaneshwari
Summary: By incorporating CNTs into the SPEEK membrane, the composite membrane shows improved properties, including water uptake capacity and ion exchange capacity. The power density of the composite membrane is 2 times higher than that of the pristine membrane. The composite membrane with 0.75% CNT-SPEEK exhibits the highest power density.
Article
Nanoscience & Nanotechnology
Kyungwhan Min, Abu Zafar Al Munsur, Sae Yane Paek, Soomin Jeon, So Young Lee, Tae-Hyun Kim
Summary: By coating N-doped carbon quantum dots (CQDs) with hydrophilic functional groups on Nafion-212 membrane, the morphology and ionic conductivity of the membrane are improved and hydrogen permeability is reduced. The Nafion membrane coated with 0.75 wt % of N-doped CQD (CQD-cNafion-0.75) exhibits better mechanical properties, higher oxidation stability, higher ionic conductivity of 240.3 mS cm-1 at 80 degrees C, and a reduction in hydrogen permeability (about 10%) compared to Nafion-212. In addition, the performance of single-cell PEMWE using the CQD-cNafion-0.75 membrane is approximately 1.2 times higher than Nafion-212.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yuqing Zhang, Ailing Zhang, Yujuan Wang, Song Wang, Sanxi Li
Summary: A novel SPEEK-based blend proton exchange membrane containing liquid crystal polymer intercalated montmorillonite (LCT) was prepared by solution casting technology. The composite membrane showed higher swelling rate and proton conductivity with 1.0 wt% LCT content. The proton conductivity of the composite membrane decreased, but reached 0.137 S/cm when the LCT content was 1.0 wt%, and the swelling rate of the SPEEK membrane significantly decreased from 6.19% to 3.38%. The layer silicate structure in LCT promoted its dimensional stability, and the sulfonic group formed a hydrogen bond network in the SPEEK matrix to enhance proton transfer. These findings suggest that the composite membrane has potential as a candidate for PEMFC at 25 degrees C.
Article
Engineering, Chemical
Penghua Qian, Haixia Wang, Lei Zhang, Yong Zhou, Haifeng Shi
Summary: Sulfonated poly(ether ether ketone) (SPEEK) based composite membranes with sulfonated poly(aryl ether sulfone) (SPAES) exhibit enhanced proton transport channel and ion selectivity, resulting in higher coulombic and energy efficiencies for vanadium redox flow batteries.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Chemistry, Physical
Hang Wang, Jinghan Zhang, Xin Ning, Mingwei Tian, Yunze Long, Seeram Ramakrishna
Summary: The article discusses the importance of proton exchange membrane (PEM) in proton exchange membrane fuel cells (PEMFC) and the current research status of preparing nanofiber composite proton exchange membranes (NCPEMs) using nanocomposite technology. By introducing nanofibers, long-range proton transport channels can be formed and the skeleton can be reinforced to improve the performance of PEMFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Paper & Wood
Meng Wang, Liyuan Wang, Nanping Deng, Xiaoxiao Wang, Hengying Xiang, Bowen Cheng, Weimin Kang
Summary: In this study, a unique multi-scale nanofiber membrane prepared by electrospinning with the addition of tetrabutylammonium chloride (TBAC) was successfully applied as effective conductive fillers in Nafion membranes for proton exchange. The multi-scale nanofiber composite membranes showed improved proton conductivity and reduced methanol permeability, attributed to the hierarchical long-range channels for proton conducting and the hindrance of methanol penetration provided by the cross-linked nanofiber network. Additionally, the formation of effective acid-base pairs in the composite membrane facilitated proton hopping and enhanced proton conducting behavior.
Article
Energy & Fuels
Khadijeh Hooshyari, Hamidreza Rezania, Vahid Vatanpour, Mohadese Rastgoo-Deylami, Hamid Reza Rajabi
Summary: This study focused on the synthesis of SPEKIS and preparation of new nanocomposite blend membranes using ZnS FQDs to enhance the proton conductivity and fuel cell performance of PBI membranes. The interactions between thiazole rings and functional groups of SPEKIS and ZnS FQDs, along with PBI groups, were shown to improve the proton conductivity. The best fuel cell performance was achieved with the SPEKIS/PBI/ZnS FQDs nanocomposite blend membranes, demonstrating promising potential for high-temperature fuel cells.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Xin Chen, Shuai-Long Zhang, Shang-Hao Xiao, Zi-Feng Li, Gang Li
Summary: Recently, researchers have focused on preparing and studying proton exchange membranes. Metal-organic frameworks (MOFs) have been considered as candidates for composite membrane fillers due to their high crystallinity and structural characteristics. In this study, Hf-based MOFs were doped into a cost-effective chitosan matrix as fillers to fabricate composite films with excellent proton conductivity. The proton conductivities of the composite membranes reached above 10(-2) S cm(-1) under 100°C/98% RH.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Bo Lv, Hang Yin, Ziyi Huang, Kang Geng, Xiaoping Qin, Wei Song, Zhigang Shao
Summary: A PES-PVP-BN composite membrane with well-dispersed BN nanosheets and enhanced interaction force with PA was successfully fabricated, improving its proton conductivity and stability for HT-PEMFC applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Peng Wei, Dong Huang, Chen Luo, Yang Sui, Xi Li, Qingkun Liu, Bensheng Zhu, Chuanbo Cong, Qiong Zhou, Xiaoyu Meng
Summary: To address the conflict between strong proton conductivity and high stability in SPEEK-based PEM, researchers developed a sandwich-structure hybrid membrane by incorporating phosphotungstic acid and polyimide nanofibers. The experimental results demonstrated that this hybrid membrane exhibited lower swelling ratio and higher conductivity, making it more stable and superior to SPEEK.
Article
Energy & Fuels
Bilal Iskandarani, Naeimeh Rajabalizadeh Mojarrad, Alp Yurum, Selmiye Alkan Gursel, Begum Yarar Kaplan
Summary: This study developed a fiber-based P(VDF-TrFE)/Pt/C/S-SiO2 cathode which demonstrated promising fuel cell performance at low Pt loadings, showing potential for applications under partially humidified conditions.
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)