Article
Biochemistry & Molecular Biology
Ikram Rana, Takahiro Nagaoka, Hiroki Nagasawa, Toshinori Tsuru, Masakoto Kanezashi
Summary: The effects of carbon number and fluorine doping on the structure and gas permeation properties of organosilica membranes were investigated. The results showed that carbon number and fluorine doping could alter the pore structure of the membranes and affect their gas permeation properties.
Article
Engineering, Chemical
Mari Takenaka, Hiroki Nagasawa, Toshinori Tsuru, Masakoto Kanezashi
Summary: F-BTESM membranes were fabricated by doping a fluorine source into BTESM, resulting in controllable pore size and enhanced hydrocarbon permeation properties. The addition of fluorine at the correct concentration improved molecular sieving for C3/C4 hydrocarbon separation, showing high C3H6 permeance with an expanded pore size. In binary N-2/C3-C4 hydrocarbon separation, the permeance of N-2 was decreased due to a blocking effect by hydrocarbons with stronger affinity inhibiting N-2 permeation.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Meng Guo, Junming Qian, Rong Xu, Xiuxiu Ren, Jing Zhong, Masakoto Kanezashi
Summary: Organosilica membranes with aromatic groups, such as benzene, show great potential for CO2 capture applications due to their robust network structures and infinite decoration possibilities. Gas permeation properties of these membranes can be finely tuned by changing the location and number of the aromatic groups.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Ikram Rana, Hiroki Nagasawa, Kazuki Yamamoto, Toshinori Tsuru, Takahiro Gunji, Masakoto Kanezashi
Summary: By fluorine-doping, the network pore structure of BTESP membranes can be controlled to improve gas permeation properties and selectivity. Fluorine significantly reduced the Si-OH density, increased the surface area and micropore volume, and enhanced the hydrophobicity of the BTESP network structure.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Hooman Chamani, Takeshi Matsuura, Dipak Rana, Christopher Q. Lan
Summary: This study investigates two issues in the measurement method of pore size distribution and finds that the calculation process and assumption have an impact on the results.
Article
Nanoscience & Nanotechnology
Ufafa Anggarini, Liang Yu, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, nickel-doped aminosilica membranes were prepared using different terminal amine ligands, and the differences in ligand structures significantly affected the formation of coordinated structures. The coordination of short and rigid pendant amino groups with nickel resulted in the formation of subnanopores, while longer and sterically hindered aminosilica precursors likely underwent an ion-exchange interaction. The basicity of amine precursors also influenced the development of a coordinated network.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Gianni Olguin, Christelle Yacou, Julius Motuzas, Maik Butterling, Wilhelm A. Meulenberg, Simon Smart, Joao C. Diniz da Costa
Summary: This work investigates the in-situ structural characterization of silica derived thin film membranes using positron annihilation lifetime spectroscopy (PALS). The study found that the pore size distribution depth profile and coating layers had an impact on the pore size and gas separation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: Subnanoporous organosilica membranes outperform nanoporous membranes in steam recovery at high temperatures, exhibiting higher water permeance, H₂O/N₂ permeance ratio, and maximum water flux. They also demonstrate similar high levels of water permeance for various binary steam/non-condensable gas mixtures.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Jens Rubner, Soukaina Skribbe, Hannah Roth, Lara Kleines, Rainer Dahlmann, Matthias Wessling
Summary: Selective, nanometer-thin organosilica layers show promising gas separation performance for pure and mixed gases, with potential for size exclusion separation at elevated temperatures.
Article
Engineering, Chemical
Sadaki Samitsu, Edhuan Ismail, Yoshihisa Fujii, Izumi Ichinose
Summary: High-density crosslinked polymer membranes with a thickness of several tens of nanometers were prepared using chemical vapor deposition (CVD) of propylamine (PA). The membranes had a composition of C3.0H4.7N0.8O0.4 and contained various functional groups. The pore sizes of the membranes were found to be 0.3-0.7 nm, and their porosity was approximately 10%. The study demonstrated the ability to tune the thickness, pore size, porosity, and density of these hydrophilic crosslinked membranes by adjusting the CVD parameters.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Jing-Yi Li, David K. Wang, Hui-Hsin Tseng, Ming-Yen Wey
Summary: BTESE-derived organosilica membranes were prepared using sol-gel method with tailored network through different solvents and membrane thickness, showing high ideal selectivity for gas separation due to controlled mechanism by molecular sieving and selective surface diffusion.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Mallikarjunagouda Patil, Shridhar N. Mathad, Arun Y. Patil, Muhammad Nadeem Arshad, Hajar Saeed Alorfi, Madhu Puttegowda, Abdullah M. Asiri, Anish Khan, Naved Azum
Summary: This study presents the synthesis of modified PVA-g-St-g-PMA copolymers and the fabrication of PVA-g-AC composite membranes using microwave irradiation technique and potassium persulfate initiator. The modified composite membranes showed excellent permeability and selectivity, as well as the advantages of easy handling and reusability.
Article
Chemistry, Multidisciplinary
Xiaoguang Wang, Shinpei Kusaka, Akihiro Hori, Ryotaro Matsuda
Summary: An efficient fabrication method for a metal-organic framework (MOF) membrane was reported in this study, with a 2D structure suitable for gas separation. The membrane obtained on a treated substrate was continuous and defect-free, while the one grown on an unmodified substrate had unfavorable crystal orientation.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Engineering, Chemical
Dongcheng Li, Xiaopeng Wang, Wen Tan, Yanhao Huang, Lingyong Zeng, Yiyi He, Peifeng Yu, Huixia Luo
Summary: The study introduces a new ceramic composite oxygen transport membrane with excellent CO2 stability and acceptable oxygen permeability, offering potential applications in oxy-fuel combustion. The optimal doping composition shows a comparable oxygen permeation rate and steady performance under a pure CO2 environment for 50 hours, enhancing its practicality in modern clean energy industries.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Liang Liu, Forbes McGain, Sandra E. Kentish
Summary: A feasible means to capture anesthetic gas and retain it within the circuit is developed using a microporous BTESE membrane. The membrane, prepared by a sol-gel method and enhanced with rapid thermal processing, shows promising results with stable performance under different conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
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
Materials Science, Ceramics
Kohei Kajimura, Katsuhiro Horata, Yohei Adachi, Masakoto Kanezashi, Toshinori Tsuru, Joji Ohshita
Summary: Urea-and isocyanurate-containing polysilsesquioxane (PSQ) membranes were prepared and their CO2 separation performance was investigated. The synthesis of urea-containing PSQ membranes on inorganic supports and copolymerization with bis(triethoxysilyl)alkanes (EtO)3Si(CH2)xSi(OEt)3 (x = 1-3) improved the CO2/N2 permselectivity and CO2 permeance. Homopolymerization of isocyanurate-containing precursors yielded membranes with even higher performance, especially the membrane prepared from tris(triethoxysilylpropyl) isocyanurate (TTESPI) showed the highest CO2 permeance and CO2/N-2 permselectivity. The CO2-philicity of urea units played a role in determining membrane performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(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.
Review
Biochemistry & Molecular Biology
Sulaiman Oladipo Lawal, Masakoto Kanezashi
Summary: This review provides a brief conceptual overview of membranes derived from organic chelating ligands. It classifies the membranes based on their matrix composition. The review emphasizes the importance of organic chelating ligands in the formation of inorganic-organic composites. It explores the different types of organic chelating ligands and their role in microstructural engineering of the membranes.
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)