Article
Chemistry, Physical
Zhi Hong Cai, Xue Lang Gao, Wei Ting Gao, Yvonne Shuen Lann Choo, Jia Jun Wang, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu
Summary: In recent years, the continuous application of superacid-catalyzed condensation reactions has led to the development of anion exchange membranes (AEMs) with excellent performance. One widely discussed method is the copolymerization of two aromatic compounds with piperidone via a superacid-catalyzed reaction to synthesize anionic conducting copolymers. Among them, the poly(N-alkylcarbazole-co-terphenyl N,N '-dimethylpiperidinium) (PCTP-n) membranes exhibit high dimensional stability, alkaline resistance, mechanical robustness, and OH- conductivity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Nanjun Chen, Chuan Hu, Ho Hyun Wang, Sun Pyo Kim, Hae Min Kim, Won Hee Lee, Joon Yong Bae, Jong Hyeong Park, Young Moo Lee
Summary: The study introduces aliphatic chain-containing PDTP copolymers to enhance the performance of AEMFCs. By reducing phenyl content in AEIs and improving mechanical properties in AEMs, PDTP materials exhibit excellent performance indicators such as mechanical properties, fuel barrier properties, ion conductivity, and stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Chemical
Min Liu, Xu Hu, Bin Hu, Lei Liu, Nanwen Li
Summary: The superacid-catalyzed polymerization and quaternization reaction is an effective method for preparing AEM materials with high conductivity and stability. The PQP-100 AEM shows excellent conductivity, morphology stability, catalytic efficiency, and advantages in membrane thickness.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Lingling Ma, Manzoor Hussain, Lv Li, Naeem Akhtar Qaisrani, Lei Bai, Yabin Jia, Xiaoming Yan, Fengxiang Zhang, Gaohong He
Summary: Introducing octopus-like side chains in alkaline anion exchange membranes enhances conductivity and stability, leading to higher ion conductivity and durability. The use of these side chains in AEMs demonstrates improved performance in hydrogen/oxygen fuel cells.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Beijia Zhao, Zhejing Zhang, Jiawei Zhang, Ling Wang, Tingting Wang, Jianhao Dong, Chenxi Xu, Jingshuai Yang
Summary: Anion exchange membrane fuel cells (AEMFCs) offer advantages such as using cheap catalytic materials, fast oxygen reduction reaction, and low-cost membranes. However, developing durable anion exchange membranes (AEMs) remains a major challenge. In this study, an ether-free polymer was synthesized and used as the matrix for AEM. Four ionic liquids were synthesized and used as quaternization reagents for the polymer. The resulting AEMs exhibited high conductivity and low swellings. One particular AEM showed excellent alkaline stability and retained high ion conductivity after prolonged storage in a KOH solution. Furthermore, a fuel cell based on this AEM was tested and showed technical feasibility.
Article
Engineering, Chemical
Hae Min Kim, Chuan Hu, Ho Hyun Wang, Jong Hyeong Park, Nanjun Chen, Young Moo Lee
Summary: This study reports the use of side-chain-type s-PDTP copolymers as ionomers and membranes for anion exchange membrane fuel cells (AEMFCs). These copolymers exhibit high alkaline stability, excellent micromorphology, and high OH- conductivity. The ionomers with moderate ion-exchange-capacity and rational water uptake show optimal AEMFC performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Ho Hyun Wang, Chuan Hu, Jong Hyeong Park, Hae Min Kim, Na Yoon Kang, Joon Yong Bae, Won Hee Lee, Nanjun Chen, Young Moo Lee
Summary: This study reports the fabrication of high-performance AEMs reinforced with polyethylene using ethanol as a co-solvent. The addition of ethanol improves the penetration efficiency of polymer solutions in the substrate, resulting in AEMs with high transmittance and outstanding tensile strength. The peak power densities of the AEMFCs based on these membranes also demonstrate excellent performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Zhejing Zhang, Na Yu, Haoran Sun, Ruihong Liu, Yixin Xu, Jingshuai Yang
Summary: We designed and prepared a series of anion exchange membranes (AEMs) based on poly(ether ketone cardo) (PEKC) to achieve high chemical stability and ionic conductivity. Among them, the PEKC-AP-Pip membrane shows the highest OH- conductivity, excellent mechanical strength, and good alkaline stability, making it a promising candidate for alkaline energy devices.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Engineering, Chemical
Wei Yuan, Lingping Zeng, Shangkun Jiang, Caili Yuan, Qian He, Jianchuan Wang, Qiang Liao, Zidong Wei
Summary: Anion exchange membrane fuel cells (AEMFCs) have the advantage of low cost, but the use and commercialization of anion exchange membranes (AEMs) have always been challenging. This study successfully prepared AEMs and ionomers with non-rotatable rigid carbazole group and piperidinium group, and demonstrated their excellent performance in conductivity, mechanical strength, and stability. Moreover, the fuel cell based on these materials showed outstanding peak power density and long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Ruyu Li, Xiaoli Chen, Xixing Zhou, Yinghua Shen, Yizheng Fu
Summary: The introduction of long side chains is a common strategy to improve hydroxide transport in anion exchange membranes (AEMs). However, the effect of side-chain position on hydroxide transport in poly(arylene indole piperidinium) AEMs is still unclear. This study used molecular dynamics simulation to investigate this effect and found that AEMs with side chains attached onto the backbone separated from cationic groups (a-PITPC10) show superior hydroxide transport compared to those with side chains linked to cationic groups (t-PITPC10 and p-PITPC10).
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xingyu Wu, Nanjun Chen, Chuan Hu, Harm-Anton Klok, Young Moo Lee, Xile Hu
Summary: A fluorination strategy is reported to create a phase-separated morphological structure in poly(aryl piperidinium) anion-exchange membranes (AEMs). The fluorinated AEMs possess high conductivity and dimensional stability, as well as excellent mechanical and chemical stability. AEMFCs using these fluorinated AEMs achieve outstanding peak power density and remain stable over extended operation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chuan Hu, Na Yoon Kang, Hyun Woo Kang, Ju Yeon Lee, Xiaohua Zhang, Yong Jun Lee, Seung Won Jung, Jong Hyeong Park, Myeong-Geun Kim, Sung Jong Yoo, So Young Lee, Chi Hoon Park, Young Moo Lee
Summary: Researchers have developed a new type of polymer electrolyte for alkaline energy conversion devices using highly rigid triptycene as a branching agent. The electrolyte exhibits excellent conductivity, mechanical properties, anti-swelling ability, and alkaline stability. Fuel cells and water electrolyzers based on this electrolyte demonstrate promising performance, indicating wide application potential.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Jie Liu, Li Gao, Xuehua Ruan, Wenji Zheng, Xiaoming Yan, Gaohong He
Summary: In this research, a new type of poly(aryl ether piperidinium) membrane was developed with improved conductivity, excellent alkaline stability and mechanical properties. The conductivity and peak power density of fuel cells were increased by optimizing the micro-phase separation structure and improving water uptake. The QPEPTpi-35 membrane demonstrated superior performance in various tests, including high conductivity, alkaline stability, and power density.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xin Wang, Yingda Huang, Meizi He, Yinghua Shen, Shibin Liu, Lei Liu, Nanwen Li
Summary: This study investigates the effect of introducing different nonionic pendant groups in polymeric anion exchange membrane (AEM) materials. The results show that the addition of methyl pendant groups leads to a higher water uptake and OH- hydroxide conductivity compared to other membranes. The PBP-M-35 membrane also exhibits superior alkaline stability and performs well in a water electrolyzer.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Huanhuan Chen, Ki-Taek Bang, Ye Tian, Chuan Hu, Ran Tao, Yufei Yuan, Rui Wang, Dong-Myeong Shin, Minhua Shao, Young Moo Lee, Yoonseob Kim
Summary: The lack of anion exchange membranes (AEMs) with both high hydroxide conductivity and stable mechanical and chemical properties is a major challenge for high-performance fuel cells. In this study, a piperidinium polymer with a polyethylene backbone was designed and synthesized for AEM fuel cell applications using facile, high-yield chemical reactions. Ionic crosslinking was introduced to suppress high water uptake and swelling while improving hydroxide conductivity. The designed AEMs exhibited excellent stability and conductivity, with a hydroxide conductivity of 354.3 mS cm(-1) and reduced water uptake and swelling.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
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)