Article
Engineering, Chemical
Takashi Ohkame, Masafumi Shibuya, Keizo Nakagawa, Takuji Shintani, Hideto Matsuyama, Tomohisa Yoshioka
Summary: A new method was developed to prepare chemically robust thin-film composite hollow-fiber (TFC-HF) nanofiltration membranes using a dip-coating process. By utilizing a negatively charged disulfonated poly(arylene ether sulfone) random copolymer (SPN-20) as the separation layer, the membranes showed excellent rejection of Na2SO4 (>98%) and an almost 100% rejection of negatively charged dyes along with a reasonable level of pure water flux (1.0-10.3 [L.m(-2).h(-1).bar(-1)]).
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Materials Science, Characterization & Testing
Fei Yu, Linghan Xiao
Summary: The addition of poly(ether sulfone) modified graphene reduced the crystallinity of PEEK composites and shortened the total crystallization time. With increasing the mass ratio of PES to GE, the peak temperature and nucleation activity of f-GE(i) increased before declining.
Article
Engineering, Chemical
Sandra L. Aristizabal, Lakshmeesha Upadhyaya, Maik Tepper, Hannah Roth, Malinalli Ramirez-Martinez, Matthias Wessling, Suzana P. Nunes
Summary: In this study, an acid-resistant spinneret was fabricated using 3D printing technology, which was then used to produce high-performing hollow fibers. The hollow fiber modules showed stable filtration performance at high temperature.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Polymer Science
Samal Babanzadeh, Shahram Mehdipour-Ataei, Samaneh Khodami
Summary: A novel aromatic poly(sulfide sulfone) (PPY) and poly(ether sulfone) (PBM) were synthesized, and dense membranes of PBM/PPY blends were prepared and characterized in this study. The results showed good miscibility between the two polymers, and the addition of PPY could enhance the thermal stability and hydrophilicity of the membranes.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Yue Sun, Yadong Wu, Yuhao Hu, Congcong Zhu, Hao Guo, Xiang-Yu Kong, Ercang Luo, Lei Jiang, Liping Wen
Summary: By utilizing highly soluble lithium bromide solutions, specific membranes, and electrodes, thermoenhanced osmotic energy conversion can improve power density and efficiency by regulating the heat gradient. This advancement provides a basis for a closed-loop system and shows promising potential in the field of energy harvesting.
NPG ASIA MATERIALS
(2021)
Article
Polymer Science
Chongyang Zhang, Mengzhu Li, Handong Sun, Xigui Yue
Summary: A porous poly(ether sulfone) membrane with low dielectric constant is fabricated by introducing perfluorononyl oxide side groups through post-grafting, resulting in different electric and thermal properties depending on the molar ratio. The membranes with ordered pore structure have low dielectric constant values ranging from 1.57 to 2.19 at 10 kHz.
POLYMER INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Sudeep Kumar Gummadi, Akshay Saini, Josiah Sam Owusu-Danquah, Prabaha Sikder
Summary: This study used 3D printing to develop PEEK scaffolds with different pore sizes and investigated their mechanical properties through experiments and finite element analysis. The results showed that the scaffold with a pore size of 300μm exhibited the best compressive yield strength, making it suitable for orthopedic applications.
Article
Engineering, Chemical
Qi Zhao, Lina Wang, Jianhui Liu, Guohui Xu, Haicheng Jiang, Xingming Jie, Yiming Cao
Summary: Nano-porous poly(ether ether ketone) (PEEK) hollow fiber membranes were successfully fabricated via thermally-induced phase separation (TIPS) and chemical extraction of polyetherimide (PEI) from PEEK/PEI blends. The gas permeation rates, morphologies, and mechanical properties of the membranes were investigated under different spinning conditions. The presence of PEEK in the blends greatly influenced the gas permeation rates, with higher PEEK content resulting in higher permeation rates.
Article
Chemistry, Physical
Wei Fan, Shaoxiong Zhu, Jingjing Nie, Binyang Du
Summary: Thermo-sensitive microgels called PMO-MGs were synthesized and used to prepare composited ultrafiltration membranes with improved surface hydrophilicity and antifouling performance. The PMO-MGs were spherical in shape and had an average diameter of 323±12 nm. The addition of PMO-MGs also imparted thermo-sensitive characteristics to the membranes, with an increase in pure water flux from 369.7 to 618.7 L·m(-2)·h(-1) as the temperature increased from 20 to 45°C.
Article
Polymer Science
Yi Yang, Hoda Shokrollahzadeh Behbahani, Brian F. Morgan, Frederick L. Beyer, Alexis Hocken, Matthew D. Green
Summary: Charge-containing polymeric materials were studied for various applications. A series of thermoplastic poly(arylene ether sulfone) (PAES) copolymers with controllable charge contents were prepared. The incorporation of charge density led to a decrease in Tg and mechanical strength, indicating a plasticization effect. The absence of microphase separation in the ion-containing copolymer system further confirmed by electron microscopy and X-ray scattering. The hydrophilicity of the samples was evaluated by water uptake measurements, and the copolymers showed potential for applications requiring a balance between hydrophilicity, processibility, and thermomechanical performance.
Article
Energy & Fuels
Gayathri Ravi Kumar, Raja M. Pugalenthi, Guozhong Cao, Ramesh Prabhu Manimuthu
Summary: In this study, high-performing porous sulfonated poly(ether sulfone) (PSPES) nanocomposite membranes with excellent proton conductivity and stability were synthesized via modified non-solvent-induced phase inversion. The inclusion of hydroxylated boron nitride (HBN) in the membrane resulted in the formation of proton transport bridge and continuous proton transfer channels, leading to improved current and power density, as well as reduced membrane degradation.
Article
Polymer Science
Zhen Wang, Shu Feng Zhou, Yi Zhi Zhuo, Ao Nan Lai, You Zhong Lu, Xiao Bin Wu
Summary: In this study, adamantane groups were introduced into the anion exchange membranes for fuel cells, resulting in a comb-shaped structure. By adjusting the ratio of hydrophobic to hydrophilic segments, the membranes exhibited improved mechanical properties and ionic conductivity. The resulting membranes showed well-defined microphase separation between the hydrophilic and hydrophobic segments, leading to high ionic conductivity and excellent mechanical properties. Therefore, these membranes have great potential for application in fuel cells.
Article
Chemistry, Physical
Jingang Xie, Chao Liu, Haoguan Gui, Yunsheng Ding, Chao Yao, Tao Zhang
Summary: This study successfully prepared porous polymer gels using the emulsion-templated method based on physical gelation. The resulting xerogels exhibited controllable shape, low shrinkage, nanofibrous structures, and interconnecting pores, providing high adsorption capacity and stability for organic solvent vapors and particulate matters.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Physics, Multidisciplinary
Hidehito Nakamura, Kazuhiro Mori, Yoshiyuki Shirakawa
Summary: Fluorescence-free poly(ether sulfone) demonstrates rapid response to alpha particles, indicating its potential as a radiation detection material.
Article
Polymer Science
Hoda Shokrollahzadeh Behbahani, Husain Mithaiwala, Horacio Lopez Marques, Winston Wang, Benny D. Freeman, Matthew D. Green
Summary: We synthesized ammonium-functionalized copolymers and investigated their potential as sorbents for direct air capture (DAC) of CO2. The copolymers exhibited a moisture-mediated capture and release of atmospheric CO2, with the capacity increasing with the ion exchange capacity (IEC). When the relative humidity was increased, the samples released CO2.
Article
Engineering, Chemical
Ping Xu, Ralph Rolly Gonzales, Jun Hong, Kecheng Guan, Yu-Hsuan Chiao, Zhaohuan Mai, Zhan Li, Saeid Rajabzadeh, Hideto Matsuyama
Summary: A new class of polyallyl-amine (PAA)-based positively charged nanofiltration (NF) membrane was developed for efficient separation of Mg2+ and Li+. The highly hydrophilic and positively charged polyamide layer of the NF membrane, endowed by the abundant primary amine groups on the PAA molecular chain, exhibited superior Mg2+/Li+ separation ability with a high separation factor SMg2+/Li+ of 82.8 and a water permeance of 7.39 L/(m2hbar). This work provides a new potential candidate for future development of positively charged NF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Ralph Rolly Gonzales, Keizo Nakagawa, Susumu Hasegawa, Atsushi Matsuoka, Kazuo Kumagai, Tomohisa Yoshioka, Hideto Matsuyama
Summary: Ammoniacal nitrogen is a common nitrogenous pollutant in wastewater from industrial processes. This study demonstrated the osmotically assisted reverse osmosis (OARO) process using a multi-stage hollow fiber membrane module setup, with model wastewater containing ammoniacal nitrogen as the feed solution. The OARO process aimed to concentrate and recover the ammoniacal nitrogen from the wastewater. The concentration efficiency of OARO was influenced by operational parameters such as applied pressure, feed flow rate, and reflux ratio, as well as the properties of the feed solution.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Materials Science, Textiles
Fitriani Fitriani, Muhammad Roil Bilad, Sri Aprilia, Nasrul Arahman
Summary: Biodegradable film-based packaging is a current concern to replace petroleum-based packaging due to its negative impact on the environment.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Engineering, Chemical
Chen Wang, Myoung Jun Park, Ralph Rolly Gonzales, Hideto Matsuyama, Enrico Drioli, Ho Kyong Shon
Summary: The study presented the preparation of cross-linked multilayer PEI/GO nanofiltration membrane using inkjet printing assisted layer-by-layer assembly. The (PEI/GO)3 membrane showed the optimal separation performances with high permeability and selectivity. The membrane exhibited excellent rejection rates for different dyes and selectivity for different salts. Furthermore, (PEI/GO)3 membrane demonstrated desirable stability and long-term filtration stability.
Article
Engineering, Chemical
Qiangqiang Song, Yuqing Lin, Siyu Zhou, Titik Istirokhatun, Zheng Wang, Qin Shen, Zhaohuan Mai, Kecheng Guan, Hideto Matsuyama
Summary: Tailormade polyamide (PA) membrane structures with excellent selectivity and ultrafast water transportation have been developed via amine-decorated interlayer-mediated interfacial polymerization (IP). The ultrathin (8 nm) and asymmetric PA nanofilm exhibits improved water permeance and high salt rejection ratio, making it a promising candidate for efficient water reclamation and ion/molecular separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Yu-Hsuan Chiao, Zhaohuan Mai, Wei-Song Hung, Hideto Matsuyama
Summary: To meet the demand for ethanol, researchers are encouraged to develop sustainable membrane processes for solvent recovery. In this study, two simple approaches were explored to improve traditional reverse osmosis membranes for water-ethanol separation. The modified membrane achieved highly efficient recovery of ethanol and opens an opportunity for further development of a more efficient solvent purification process.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Zhan Li, Pengfei Zhang, Kecheng Guan, Ralph Rolly Gonzales, Toru Ishigami, Ming Xue, Tomohisa Yoshioka, Hideto Matsuyama
Summary: Ammonia is a toxic and hazardous substance, but it can also be a valuable chemical. Industrial wastewater often contains high concentrations of soluble gaseous ammonia. By utilizing the vapor-liquid equilibrium of the ammonia-water binary system, it is possible to recover and concentrate ammonia from these wastewater through sweep gas membrane distillation (SGMD). This study demonstrates the ammonia recovery process using SGMD and investigates the effects of different operating conditions on its performance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Multidisciplinary Sciences
Kecheng Guan, Yanan Guo, Zhan Li, Yuandong Jia, Qin Shen, Keizo Nakagawa, Tomohisa Yoshioka, Gongping Liu, Wanqin Jin, Hideto Matsuyama
Summary: In this study, a robust interlayer channel is developed to exclude salt solutes by balancing associated chemistry and confinement stability. Divergent deformation behaviors of membrane nanochannels under different conditions are revealed, and the deformation constraint effectively provides rapid deformation recovery and excellent ion exclusion performance under variable pressure conditions.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Qin Shen, Qiangqiang Song, Zhaohuan Mai, Kueir-Rarn Lee, Tomohisa Yoshioka, Kecheng Guan, Ralph Rolly Gonzales, Hideto Matsuyama
Summary: In this study, an ultrapermeable polyamide reverse osmosis membrane with crumpled surface morphology and enlarged free volume was fabricated using interfacial polymerization and self-assembly. The formation mechanism of the crumpled nanostructures was elucidated through multiscale simulations. The electrostatic interactions among molecules, monolayer, and micelles disrupted the monolayer at the interface and promoted the formation of a crumpled PA layer, resulting in enhanced water transport. This work provides valuable insights into the mechanisms of the interfacial polymerization process and has fundamental significance for exploring high-performance desalination membranes.
Article
Engineering, Chemical
Shengnan He, Eiji Kamio, Jinhui Zhang, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama
Summary: We developed a tough and highly CO2-permeable ion gel membrane by combining a CO2-philic ionic liquid (IL) and an interpenetrating polymer network (IPN). The membrane exhibited high mechanical strength and good IL-holding properties, enabling high and selective CO2 permeability. The CO2 permeability and CO2/N2 permselectivity were enhanced by increasing the IL content in the membrane. These excellent properties were maintained even after physical aging for one week.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Wenming Fu, Luyao Deng, Mengyang Hu, Zhaohuan Mai, Guorong Xu, Yongxuan Shi, Kecheng Guan, Ralph Rolly Gonzales, Atsushi Matsuoka, Hideto Matsuyama
Summary: A high-performance TFC-PA OSN membrane was developed by regulating interfacial polymerization (IP) with acetone as an organic co-solvent. The addition of acetone increased the width of the IP reaction zone, facilitated more violent exothermic reactions, and induced the formation of a 3D honeycomb-like structure with an ultrahigh specific surface area, resulting in higher methanol solvent permeance and comparable methyl orange rejection.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Guorong Xu, Yu-Hsuan Chiao, Wenming Fu, Luyao Deng, Mengyang Hu, Kecheng Guan, Ralph Rolly Gonzales, Hideto Matsuyama
Summary: This study proposes a temperature-assisted method for modulating the performance of a PA-TFC membrane in organic solvent reverse osmosis (OSRO). The combined effect of temperature and aqueous solution on the formation of the PA layer is investigated, and the evolution of the membrane parameters is analyzed. It is found that structural modulation of PA also leads to a change in the OSRO performance.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shang Xiang, Pengfei Zhang, Saeid Rajabzadeh, Ralph Rolly Gonzales, Zhan Li, Yongxuan Shi, Siyu Zhou, Mengyang Hu, Kecheng Guan, Hideto Matsuyama
Summary: In recent years, polyketone (PK) porous membranes have received significant attention due to their high tolerance to organic solvents. However, the conventional membrane preparation method requires the use of toxic solvents. This study explores the thermally induced phase separation (TIPS) method to prepare PK membranes and compares them with membranes prepared using the nonsolvent induced phase separation (NIPS) method. The TIPS method showed promising results in terms of water permeability and mechanical properties, indicating its potential for the development of high-performance PK membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Leni Maulinda, Husni Husin, Nasrul Arahman, Cut Meurah Rosnelly, Nurhazanah, Muhammad Syukri, Fahrizal Nasution, Ahmadi
Summary: This research investigates the impact of pyrolysis time and temperature on the composition and properties of bio-oil derived from Mimusops elengi. The results demonstrate that both temperature and time significantly influence the yield and composition of bio-oil. Higher temperatures and longer durations promote the decomposition of biomass and increase bio-oil yield. The bio-oil contains diverse functional groups and compounds, making it a potential alternative feedstock.
Article
Engineering, Chemical
Atsushi Matsuoka, Masayuki Fukushima, Eiji Kamio, Tomohisa Yoshioka, Keizo Nakagawa, Yasunao Okamoto, Hideto Matsuyama
Summary: In this study, amine/aldehyde mixtures are proposed as novel pH-responsive draw solutes based on dynamic covalent chemistry. It has been demonstrated that the phase separation behavior of alkylamine/2-pyridinecarboxyaldehyde mixtures can be controlled via reversible imine formation. These mixtures exhibit higher osmotic pressures and better performance compared to conventional draw solutes.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)