Article
Engineering, Chemical
Xuepeng Deng, Yang Han, Li-Chiang Lin, W. S. Winston Ho
Summary: A new measurement method for the steric hindrance effect of amine molecules, N exposure, is proposed. This method is independent of group-specific parameters and takes into account the spatial arrangements of pendant groups. It can effectively screen for sterically hindered amines with improved carbon dioxide loading capacities.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Xiuxiu Ren, Masakoto Kanezashi, Meng Guo, Rong Xu, Jing Zhong, Toshinori Tsuru
Summary: By using a mixed matrix membrane strategy with multiple amine POSS particles, a potential CO2 separation performance can be achieved. The pore size of the BTESE-PNEN membrane is larger than that of the BTESE-APTES hybrid membrane, resulting in different separation performance. At a low concentration of PNEN, the BTESE-PNEN membrane shows similar performance to copolymerized BTESE-APTES-related hybrid membranes.
Article
Engineering, Chemical
Jing-Yi Li, Yu-Ting Lin, David K. Wang, Hui-Hsin Tseng, Ming-Yen Wey
Summary: This study proposes the usage of dual hybrid organosilica for discussing the influence of thermal-driven chain stitching on the organosilica membrane structure. The research focuses on the influence of gas thermal diffusivity on the hybrid organosilica membrane for separating different gases. The results show that the fabricated organosilica membrane exhibits good performance in gas separation under optimal conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Junsu Ha, Mingyu Jeon, Jihyun Park, Jihan Kim, Hoi Ri Moon
Summary: MOF-on-MOF attracts great attention for its improved and/or synergistic properties compared to a single MOF. Non-isostructural MOF-on-MOFs with large heterogeneity show great potential for diverse applications. However, the presence of a bulkier and hindered linker at the interface can affect seamless growth, which is an important issue. The effects of bulky linkers at the interface of HKUST-1@IRMOF, a non-isostructural MOF-on-MOF system, have not yet been reported, and how interfacial strain affects growth remains unknown. This study investigates the importance of coordinating site proximity and lattice parameter matching for effective secondary growth in MOF-on-MOF.
NANOSCALE ADVANCES
(2023)
Article
Engineering, Chemical
Ye Yuan, Zhihua Qiao, Jiayou Xu, Jixiao Wang, Song Zhao, Xingzhong Cao, Zhi Wang, Michael D. Guiver
Summary: The introduction of the high-valence metal-induced microporous polymer (HMMP-1) filler into mixed matrix membranes (MMMs) enhances separation efficiency, with excellent alkaline stability and pore structure maintenance. The compatibility between HMMP-1 and PVAm improves the CO2 transport rate, leading to higher CO2 permeance and superior separation performance for CO2/CH4, CO2/N2, and CO2/H2 compared to other membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Shraavya Rao, Yang Han, W. S. Winston Ho
Summary: This work describes the development of amine-based facilitated transport membranes (FTMs) suitable for syngas desulfurization. The performances of the newly devised FTMs exceed the H2S/CO2 upper bound, and the learnings shed light on the design of amine carriers for acid gas separations.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Dafu Cao, Fei Yang, Weibing Sheng, Yufeng Zhou, Xixing Zhou, Yaguang Lu, Fengmin Nie, Nanwen Li, Li Pan, Yuesheng Li
Summary: By introducing hydrophobic arylene substituents, researchers successfully reduced the excessive water uptake and swelling ratio of quaternized polynorbornene anion exchange membrane while maintaining its excellent anion conductivity. The PBH-x-QA series of polymers with appropriate IEC values exhibited good thermal stability and tensile properties.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Takuya Kurihara, Munehiro Inukai, Motohiro Mizuno
Summary: In this study, the dynamics of CO2 adsorption and diffusion in metal-organic frameworks (MOFs) were investigated using solid-state nuclear magnetic resonance (NMR) spectroscopy. The rotational motion of ligands in the narrow pore windows of MOFs was found to affect the dynamics of adsorbed CO2. The diffusion rate of adsorbed CO2 was significantly slower in the MOFs with smaller pores, and it was influenced by the steric hindrance of the rotating ligands. Additionally, the diffusion of adsorbed CH4 was also affected by the steric hindrance, showing a size-selective effect.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Engineering, Chemical
Meixian Liu, Junliang Liu, Zequan Zeng, Xing Wang, Jianfeng Jia, Xianmo Gu, Zhanfeng Zheng
Summary: Photopurification, a technique for substance purification, achieves selective mineralization through surface modification. By co-modification of nitrogen vacancies (NV) and cyano groups (-CN) on polymeric carbon nitride (PCN), benzaldehyde (BZ) in industrial styrene oxide (SO) production solution can be selectively photomineralized. This work not only provides a modification method for selective oxidation reactions, but also offers a new technique for removing homogeneous trace impurities in natural or industrial products.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yang Liu, Zhongyun Liu, Brian E. Kraftschik, Vinod P. Babu, Nitesh Bhuwania, Daniel Chinn, William J. Koros
Summary: Raw natural gas contains impurities like H2S and CO2 which can be corrosive, but TEGMC hollow fiber membranes show efficient removal. The presence of hydrocarbons in the feed gas enhances selectivity, and competitive sorption could be a useful tool in tuning membrane performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Luming Qi, Wanyong Yang, Linlin Zhang, Qing Liu, Zhaoyang Fei, Xian Chen, Zhuxiu Zhang, Jihai Tang, Mifen Cui, Xu Qiao
Summary: In this study, a one-step strategy of introducing brush-like additives into silica support was used to prepare micro-mesoporous organosilica nanoparticles. The aminefunctionalized CO2 adsorbent obtained exhibited higher CO2 adsorption performance compared to adsorbents with none or a single additive. The synergistic action of CTAC and BTES in the adsorption mechanism was clarified through analysis and kinetics. This work provides a novel surface-modified strategy for developing adsorbents with excellent CO2 capture performance, which is of great importance for both academic interests and practical applications.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Meng Guo, Yanwen Zhang, Rong Xu, Xiuxiu Ren, Weiqiu Huang, Jing Zhong, Toshinori Tsuru, Masakoto Kanezashi
Summary: Composite organosilica membranes were fabricated via copolymerization reactions, with the addition of BTESB densifying membrane structures and copolymerization between BTESA and BTESBPh increasing membrane pore sizes. All membranes showed great potential for CO2 capture applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Polymer Science
Wei Wang, Da-Fu Cao, Xiao-Wei Sun, Li Pan, Zhe Ma, Yue-Sheng Li
Summary: A series of brominated polynorbornene derivatives with bulky steric hydrophobic groups and highly stable backbones were synthesized and post-functionalized to construct anion exchange membranes (AEMs). These AEMs exhibited super high hydroxide conductivities and low swelling ratios, and demonstrated good alkaline stability.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Mengjie Chen, Hongxia Gao, Teerawat Sema, Min Xiao, Qiang Sun, Zhiwu Liang
Summary: Several alkanolamines were studied to investigate the steric hindrance effect on the reaction kinetics between amine and CO2 in ethanol and aqueous solutions. It was found that stronger steric hindrance decreases the reaction rate, while a larger pKa value of the amine accelerates the deprotonation reaction. Additionally, the solvent environment also affects the relative influence of steric hindrance and pKa on the reaction kinetics.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Textiles
Michal Syrovy, Pavla Capkova, Petr Rysanek, Oldrich Benada, Monika Vostinakova
Summary: The manufacturing of membranes for CO2 capture is an important research topic. This study aims to achieve maximum CO2 sorption capacity while maintaining air permeability with minimal technological steps. Electrospun nanofibrous membranes PAN/TETA and PAN/TEPA were prepared using one-step technology and two different spinning conditions - needle spinning and wire spinning. The best result was obtained for wire spinning PAN_TEPA_2% with a CO2 sorption capacity of 11.7 +/- 1.3 cm(3)/g and air permeability of 53 +/- 5 L/m(2)/s, providing potential for practical use.
JOURNAL OF INDUSTRIAL TEXTILES
(2023)
Article
Engineering, Chemical
Dian Zhang, Masakoto Kanezashi, Toshinori Tsuru, Kazuki Yamamoto, Takahiro Gunji, Yohei Adachi, Joji Ohshita
Summary: Polysilsesquioxane (PSQ) reverse osmosis membranes were prepared by copolymerizing 3-glycidyloxypropyl-POSS (GPOSS) and bis[3-(triethoxysilyl)propyl]amine (BTESPA), exhibiting high NaCl rejection, good heat resistance, and chlorine resistance. The introduction of GPOSS-derived units significantly improved NaCl rejection and liquid permeability, achieving NaCl rejection of approximately 99% and liquid permeability of 5.5 x 10-13 m/s center dot Pa. These PSQ membranes with GPOSS-derived units showed excellent heat resistance up to 100 degrees C and favorable resistance to chlorine, with no obvious performance change observed after exposure to NaOCl aqueous solution (1000 ppm) for 10 h.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Guanying Dong, Yatao Zhang, Xinchang Pang, Meng Guo, Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, a facile and novel co-condensation strategy was proposed to achieve efficient pervaporation separation of aromatic/aliphatic mixtures using composite organosilica membranes. The results showed that by tailoring the membrane pore size and enhancing substance adsorption, composite organosilica membranes with superior separation performance were obtained.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Risa Takenaka, Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, graphene oxide (GO) was coated on various polymeric porous substrates to prepare composite membranes for water vapor separation. The membranes showed high water permeance and selectivity, with a reproducible and stable performance. The GO composite membranes also maintained their performance at high temperatures, making them useful for water vapor separation applications.
Article
Nanoscience & Nanotechnology
Hiroki Nagasawa, Takuya Okada, Masakoto Kanezashi, Toshinori Tsuru
Summary: The plasma-induced polymerization of liquid silsesquioxane monomer (BTESE) at the gas-liquid interface was successfully achieved using an atmospheric-pressure plasma jet at room temperature. This resulted in the formation of a thin polysilsesquioxane layer on the surface of a porous support. The confined polymerization at the plasma-liquid interface proved to be advantageous for preparing nanocomposite membranes with a thin selective layer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Wei-Wei Yan, Ufafa Anggarini, Hong-Cun Bai, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: Bis[3-(trimethoxysilyl)propyl] amine (BTPA) membranes doped with different metals (Fe, Ni, and Ag) were tested for the permeation properties of H-2, N-2, and NH3. The metal-coordinated BTPA gels showed excellent NH3 adsorption and desorption capacity due to the coordination between metal and NH3. The Ni-BTPA membrane exhibited the highest NH3 permeance and selectivity among all tested materials.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Ufafa Anggarini, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: A high-performance nickel-doped hindered tertiary amine-ring structure was created in TTPI membranes for CO2/N-2 separation using an organosilica-based coordination polymer. Increasing the Ni/N mole ratio improved metal affinity, resulting in enhanced structural rigidity, surface area, and CO2 adsorption capacity. Precise tuning of the pore size, increased microporosity, and the establishment of Ni(OH)(2) further improved permeation, achieving an ultrahigh CO2 permeance and a high CO2/N-2 permeance ratio.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shun Aoyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: The effects of plasma treatment time on the gas permeation and pervaporation dehydration properties of organosilica membranes were investigated. The study found that increasing plasma modification time resulted in a decrease in pore size, leading to an increased He/N2 permeance ratio. The H2O/EtOH permeance ratio also increased from about 20 to over 1000 as the plasma modification time increased due to changes in pore structure and water adsorption properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Norihiro Moriyama, Kotaro Wakimoto, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, the performance of PFSA membranes in humid gas separation was evaluated at temperatures ranging from 80 to 200 °C under various relative humidity conditions. It was found that PFSA layers with a thickness of 80 nm exhibited high water permeability and water/nitrogen permeance ratio at high temperatures. This study provides insights into the use of PFSA membranes at high temperatures under humid conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Ikram Rana, Hiroki Nagasawa, Toshinori Tsuru, Masakoto Kanezashi
Summary: This study presents a novel approach for the fabrication of highly CO2-permeable membranes by functionalizing tetraethoxysilane (TEOS) membranes with 3-aminopropyltriethoxysilyl (APTES) and trifluoroacetic acid (TFA). The interaction between APTES and TFA enables reversible CO2 adsorption/desorption, leading to increased microporosity and structural variations that enhance molecular sieving and control the CO2-philic sites. This method shows great potential for energy-efficient membrane fabrication.
JOURNAL OF MEMBRANE SCIENCE LETTERS
(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)