Article
Polymer Science
Andrey Basko, Tatyana Lebedeva, Mikhail Yurov, Anna Ilyasova, Galina Elyashevich, Viktor Lavrentyev, Denis Kalmykov, Alexey Volkov, Konstantin Pochivalov
Summary: A new interpretation of the mechanism of PVDF membrane formation using the NIPS method is proposed based on the complete experimental phase diagram analysis. The effects of the precipitation bath's properties on the morphology, structure, transport, and mechanical properties of the membranes are investigated. It is found that membranes with higher quality can be obtained using pure DMAc as a solvent and a precipitation bath containing 10-30% wt. of DMAc and water.
Article
Polymer Science
Konstantin V. Pochivalov, Andrey V. Basko, Anna N. Ilyasova, Tatyana N. Lebedeva, Mikhail Y. Yurov, Sergei V. Bronnikov
Summary: In this study, a new method for plotting ternary phase diagrams of a semicrystalline polymer-solvent-nonsolvent mixture was proposed. The complete ternary phase diagram of PVDF-DMAc-water was plotted for the first time. The analysis of NIPS mechanism was confirmed through direct microscopic observation and SEM analysis of the membranes obtained.
Review
Nanoscience & Nanotechnology
Amanuel Gebrekrstos, Tanyaradzwa S. Muzata, Suprakas Sinha Ray
Summary: With the continuous advancement of electronic devices, lightweight, flexible, and easily processable materials have gained substantial importance. Polymer-based piezoelectric materials, such as poly(vinylidene fluoride) (PVDF), are in great demand for various applications. However, the low electrical conductivity and dielectric permittivity of PVDF limit its performance. Therefore, researchers have focused on incorporating conductive nanofillers into the PVDF matrix to improve its properties, leading to promising results.
ACS APPLIED NANO MATERIALS
(2022)
Article
Environmental Sciences
Kaikai Chen, Wei Zhao, Changfa Xiao, Hui Zhu, Qiming Wang
Summary: This study investigated the fouling mechanism of different polyvinylidene fluoride hollow fiber membranes in membrane bioreactor systems. The results showed that the homogeneous-reinforced polyvinylidene fluoride (HMR-PVDF) membrane exhibited better fouling resistance compared to the heterogeneous-reinforced polyvinylidene fluoride (HTR-PVDF) membrane.
Article
Chemistry, Physical
Jenn Fang Su, Konstantinos G. Beltsios, Ping-Hong Li, Liao-Ping Cheng
Summary: Symmetric microporous PVDF membranes were prepared using a ternary system with water/triethyl phosphate/PVDF, inducing phase separation and controlled surface structure. These membranes exhibit high hydrophobicity, large porosity, and submicron pore size, making them suitable for membrane distillation in desalination applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Sajjad Mohsenpour, Sebastian Leaper, Javad Shokri, Monica Alberto, Patricia Gorgojo
Summary: In this research, the membrane morphology of PES and PVDF membranes was studied by controlling the thermodynamic properties of casting solutions, with the addition of graphene oxide (GO) influencing the phase separation behavior. The theoretical binodal lines constructed using the Flory-Huggins theory and the Hansen solubility parameters were validated through cloud titration experiments. Different solvents were found to induce varying pore structures in the membranes, impacting the porosity and pure water flux.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Environmental
Chao Liu, Hongwei Xu, Bingjie Huo, Jingxue Wang, Zichen Wang, Xiaxia Chen, Fanqing Meng, Chaoyue Sun, Yinglong Wang
Summary: This article introduces the characteristics, research progress, and application forms of piezoelectric polymers, which are of great value in the field of piezocatalysis.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Qingyun Zhang, Jin Wang, Zhaoxu Zhou, Kaili Huo, Mengmeng Dou, Chao Han, Xiaoyue Wang, Shahriar Md Hasan, Boru Gao
Summary: In this study, graphene oxide (GO) was combined with nitrogen defect-modified g-C3N4 (DCN) nanosheets to prepare hydrophilic two-dimensional nanocomposite membranes (NCMs). The addition of DCN, GO and GO@DCN nanomaterials accelerated the phase inversion of the NCMs, leading to increased porosity and enhancing water permeability. Density Functional Theory (DFT) calculations showed a strong interaction between PVDF and GO@DCN, which contributed to the rapid phase inversion. The NCMs also exhibited superior antifouling ability and stable performance after multiple cleaning cycles.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Suzana Djeljadini, Patrick Bongartz, Michael Alders, Nils Hartmann, Alexander Oing, Christian Cornelissen, Felix Hesselmann, Jutta Arens, Ulrich Steinseifer, John Linkhorst, Matthias Wessling
Summary: A novel fabrication technology involving additive manufacturing and templating has been successfully used to create customized 3D porous polymer monoliths with tailored surface coatings. This method enables the production of complex porous polymer structures that can be applied to various geometries, paving the way for new generation materials with enhanced functionalities.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Engineering, Chemical
Ayesha Ilyas, Loren Timmermans, Maarten Vanierschot, Ilse Smets, Ivo F. J. Vankelecom
Summary: This study investigates the use of spray-modified non-solvent induced phase separation (s-NIPS) to create large patterned PVDF membranes and magnetically induced membrane vibration (MMV) to enhance their anti-fouling properties. The results show that patterned membranes reduce fouling rate and increase critical flux, while membrane vibration further improves anti-fouling potential and delays irreversible fouling.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Mahboobeh Yousefian-Arani, Alireza Sharif, Mohammad Karimi
Summary: Thermodynamic phase diagrams are powerful tools that can predict the behavior and morphology of phase inversion membranes. Introducing nanoparticles into a polymeric membrane forming system significantly impacts the system's phase diagram. With the help of a lattice-based thermodynamic model, this study investigates the phase diagram of polymeric membrane formation through non-solvent induced phase separation (NIPS) in the presence of different nanoparticles. The concept of the nanoparticle-out effect is introduced to explain the influence of nanoparticles on the binodal curves of the systems.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Multidisciplinary Sciences
Anatol W. Fritsch, Andres F. Diaz-Delgadillo, Omar Adame-Arana, Carsten Hoege, Matthaeus Mittasch, Moritz Kreysing, Mark Leaver, Anthony A. Hyman, Frank Juelicher, Christoph A. Weber
Summary: Membraneless compartments, known as condensates, provide chemically distinct environments and spatially organize the cell. P granules in the roundworm Caenorhabditis elegans are RNA rich protein condensates with properties of liquid droplets, such as spherical shape and fast diffusion. The response of P granule condensates to temperature changes suggests that their assembly and disassembly are governed by phase separation at local thermal equilibria, despite the nonequilibrium nature of the cytoplasm on larger scales.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Engineering, Environmental
Chuanfeng Wang, Yingbo Chen, Xiaoyu Hu, Pengfei Guo
Summary: A dual-layer PVDF loose nanofiltration hollow fiber membrane with desirable properties was designed via phase inversion process, demonstrating low MWCO and excellent separation performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Dong Zou, Longbo Xia, Ping Luo, Kecheng Guan, Hideto Matsuyama, Zhaoxiang Zhong
Summary: In this study, high-porosity PVDF-PSF membranes were prepared by dissolving PVDF and PSF polymer powders in PolarClean. The addition of PVDF nanoparticles on the membrane surface improved the hydrophobicity and liquid entry pressure of the membrane. These membranes exhibited high water flux and excellent desalination performance.
Article
Biochemistry & Molecular Biology
Van-Tien Bui, Van-Toan Nguyen, Ngoc-Anh Nguyen, Reddicherla Umapathi, Liudmila L. Larina, Jong Heon Kim, Hyun-Suk Kim, Ho-Suk Choi
Summary: The researchers developed a novel multilayer PVDF-HFP membrane with a highly porous and lamellar structure, offering superior electrolyte wettability and porous structure for better electrochemical performance compared to commercial separators. With a tensile strength of 13.5 MPa, the membrane's mechanical strength is close to Celgard type in the transversal direction. The multilayer membrane design allows significant improvements in both mechanical and electrochemical performance, making it a preferable separator for high-power and high-energy storage devices.
Article
Engineering, Chemical
Jing Dou, Shuo Han, Saisai Lin, Zhikan Yao, Lian Hou, Lin Zhang
Summary: This study proposed a method of introducing polymer of intrinsic microporosity, PIM-1, into the selective layer of reverse osmosis membranes to enhance water permeation while maintaining high salt rejection. The experimental results showed that the water permeability of the prepared membranes increased significantly with the introduction of PIM-1, while maintaining high NaCl rejection.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Junjun Li, Mi Huang, Ping Wei, Yaqin Zhang, Xuean Zhao, Chunbo Liu, Zhijun Zhou, Lin Zhang
Summary: This study investigates the anomalous water perm-selectivity of poly(vinyl butyral) (PVB) membrane in practical pervaporation (PV) process, and comprehensively analyzes its mechanism through experimental and theoretical methods. The results show that the surface reconstruction of PVB membrane in contact with ethanol exposes hydrophilic hydroxyl groups, improving its affinity to water. Swelling experiments further demonstrate the accumulation of water in the ethanol swollen membrane. Theoretical analysis confirms the mechanism of the anomalous phenomenon of PVB membrane.
Article
Engineering, Environmental
Chao Yang, Linxiao Hou, Jingjing Zhao, Zhikan Yao, Ge Li, Lin Zhang, Li'an Hou
Summary: The study successfully synthesized acid-stable cationic COF layers by introducing -OH functionalities on anion exchange membranes, leading to an increased separation factor for HCl recovery. This method shows promise for expanding the application of COF membranes in acid recovery processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Qian Li, Peng Song, Yuye Yang, Yan Li, Naixin Wang, Quanfu An
Summary: This paper presents a novel composite membrane for water purification, in which carboxylated carbon nanotubes (CNTs) are intercalated into layered double hydroxide (LDH). The intercalation of CNTs creates more mass transfer channels for water molecules and improves the permeance of the membrane by more than 50%. The prepared CNTs/LDH composite membrane shows excellent separation performance for dye molecules and remains stable over a 100-hour period. This study demonstrates the great potential of the CNTs/LDH composite membrane in water purification applications.
Article
Engineering, Chemical
Chong Li, Jie Li, Peng Cai, Tengxuan Cao, Nai Zhang, Naixin Wang, Quan-Fu An
Summary: Pervaporation has great potential in separating significant mixtures, but excessive penetration of the separation layer into substrate pores can hinder membrane development. A floating-on-water method was used to prepare PDMS/PTFE composite membranes with controlled thickness and pore penetration. The composite membrane exhibited high flux and stability in ethanol perm-selective pervaporation.
Article
Engineering, Chemical
Xiaosheng Ji, Ge Li, Guangyao Chen, Yukun Qian, Hongyu Jin, Zhikan Yao, Lin Zhang
Summary: In this study, aminated PES substrates were prepared and applied for investigating the interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricarbonyl trichloride (TMC). The study found that thin, dense, and defect-free selective layers were synthesized on the aminated substrates under low concentration conditions, while thin film composite (TFC) membranes without polyamide intrusion were formed under high concentration conditions. The aminated substrates based TFC membrane showed high separation performance, indicating its potential in salt separation processes.
Article
Engineering, Chemical
Lei Jiao, Lida Meng, Kangkang Yan, Jing Wang, Ge Li, Zhikan Yao, Zhilin Sun, Lin Zhang
Summary: This study investigated the membrane wetting issue in vacuum membrane distillation using electrospun nanofiber membranes. The results revealed that wetting was caused by the crystallization of NaCl due to supersaturation, and it was reversible through a proper regeneration strategy, allowing for continuous operation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Shuo Li, Shu-Mei Chang, Ming-Jie Yin, Wen-Hai Zhang, Wei-Shi Sun, Angus Shiue, Quan-Fu An
Summary: This study proposes a simple solvothermal annealing approach to enhance the flexibility of PEO membranes and improve their CO2 permeability. The optimized membrane shows high CO2 permeability and selectivity, as well as long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Bin Wu, Naixin Wang, Jian-Hui Lei, Yue Shen, Quan-Fu An
Summary: The use of phase transfer catalysts to enhance the transport of zwitterionic amine monomers during interfacial polymerization process leads to the fabrication of polyamide thin-film composite nanofiltration membranes with excellent separation performance and antifouling properties.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Hao Sun, Naixin Wang, Xiaoting Li, Quan-Fu An
Summary: In this study, a metal-organic framework (MOF) layer was used as a precursor template to prepare a tubular ceramic substrate for the construction of a ZIF-67-derived CoSx composite membrane through in-situ sulfurization strategy. The resulting membrane exhibited high separation performance and good stability for dye/salt separation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Cheng-Gang Jin, Ming-Jie Yin, Jia-Kai Wu, Wen-Hai Zhang, Naixin Wang, Quan-Fu An
Summary: This study proposed a 'hard-crosslinking-soft' strategy to construct an organic-inorganic hybrid membrane for efficient and environmentally friendly dehydration of acetic acid. The optimized membrane showed excellent separation performance in dehydration of water/acetic acid mixtures, promising practical applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Wen-Hai Zhang, Zhi-Jie Liu, Ming-Jie Yin, Yun-Han Ren, Cheng-Gang Jin, Naixin Wang, Quan-Fu An
Summary: In this study, a rapid method for fabricating loose nanofiltration membrane was proposed using dynamic self-assembly and ice-templating technique. The prepared membrane showed superior water permeability, dye rejection efficiency, and long-term stability, making it a promising candidate for wastewater treatment.
Article
Chemistry, Multidisciplinary
Shuo Li, Yu-Jie Sun, Zhao-Xu Wang, Cheng-Gang Jin, Ming-Jie Yin, Quan-Fu An
Summary: In this study, a solvent-controlled crystallization strategy was employed to achieve in-situ crystallization of MOF nanocrystals in the polymer matrix, resulting in the construction of defect-free CO2 transportation channels. The fabricated mixed matrix membranes exhibit approximately fourfold enhancement in CO2 permeability, i.e., 2490 Barrer, with a CO2/N-2 selectivity of 37, along with outstanding antiplasticization merit and long-term stability, enabling the large-scale manufacture of high-performance membranes for gas separation.
Article
Engineering, Chemical
Yue Shen, Jingyuan Zhou, Bin Wu, Mengni Ge, Naixin Wang, Yan Zhao, Quan-Fu An, Bart Van der Bruggen
Summary: A zwitterionic NF membrane with anti-scaling performance was fabricated through the incorporation of multi-carboxyl carboxylate (sodium citrate) by interfacial polymerization. The resulting NF membrane showed a more negatively charged surface and a larger pore size, leading to a high selectivity in desalination. This design strategy provides guidance for the development of highly ion selective anti-scaling NF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Weiyu Dou, Jing Wang, Zhikan Yao, Wei Xiao, Man Huang, Lin Zhang
Summary: Hemoperfusion is an effective adjuvant treatment for severe diseases, providing specific removal of pathogenic factors from the blood of patients. Advances in technology have led to the development of clinical applications, highlighting the need for high-performance devices in the field.
MATERIALS ADVANCES
(2022)
Article
Engineering, Chemical
Arvin Sohrabi, Mousa Meratizaman, Shuli Liu
Summary: This paper simulates and discusses possible solutions to improve the economic and technical performances of a battery-less renewable energy-powered BWRO system under real climate conditions. The study finds that the photovoltaic-based system performs better in terms of specific energy consumption and unused energy ratio.
Article
Engineering, Chemical
Chunlan Pan, Xiaoyin Hu, Vishal Goyal, Theyab R. Alsenani, Salem Alkhalaf, Tamim Alkhalifah, Fahad Alturise, Hamad Almujibah, H. Elhosiny Ali
Summary: This paper introduces a novel waste heat recovery method using the hot flue gas from a ship's engine to produce liquefied hydrogen while meeting the ship's air-conditioning requirement. A comprehensive feasibility assessment is conducted and an artificial neural network with a multiobjective grey wolf optimization method is used for optimization. The findings indicate the highest mean sensitivity index of the flash temperature and the best optimization scenario for exergy efficiency, CO2 emission reduction, and liquefied hydrogen cost.
Article
Engineering, Chemical
Daniele Chinello, Jan Post, Louis C. P. M. de Smet
Summary: In this study, PVDF-based anion-exchange membranes were designed to selectively separate nitrate from chloride. Experimental data showed that increasing the concentration of PVDF enhanced nitrate transport but also increased the membrane electrical resistance. The selectivity of nitrate was found to be independent of the membrane thickness and mainly driven by the increased affinity between the anion and the membrane.
Article
Engineering, Chemical
Umar Noor, Muhammad Fayyaz Farid, Ammara Sharif, Amna Saleem, Zubair Nabi, Muhammad Furqan Mughal, Kiran Abbas, Toheed Ahmed
Summary: Global water scarcity is increasing, and water desalination is an important solution. Multifunctional advanced materials, such as membrane materials and solar-driven desalination, play a crucial role in water desalination. Additionally, these materials can be used for water purification, wastewater treatment, and pollutant elimination.
Article
Engineering, Chemical
Emrah Gumus
Summary: With growing global concerns about climate change and environmental impacts, the use of nuclear energy in naval vessels offers a cleaner and more efficient solution to reduce emissions and address water and energy supply challenges. This study explores a novel system that combines a nuclear-driven supercritical carbon dioxide power cycle with reverse osmosis cogeneration to meet the water and electricity demands in maritime operations, enhancing the sustainability, efficiency, and self-sufficiency of naval vessels. The results indicate that the system has the potential to be a viable and effective solution for naval operations.
Article
Engineering, Chemical
Dao Thi Thanh Huyen, Saikat Sinha Ray, Young -Nam Kwon
Summary: This study focuses on the modification of a commercially available polyamide thin-film composite membrane with a zwitterionic material to enhance its fouling resistance. The modified membrane shows improved salt rejection and reduced permeability compared to the pristine membrane. Fouling tests demonstrate that the modified membrane has a lower fouling ratio and higher recovery ratio. The enhanced antifouling characteristics are attributed to the improved hydrophilicity resulting from the zwitterionic brushes and the salting-in effect.
Article
Engineering, Chemical
Niklas Koeller, Lukas Mankertz, Selina Finger, Christian J. Linnartz, Matthias Wessling
Summary: This study presents a methodology to scale up Flow-electrode Capacitive Deionization (FCDI) technology from lab-scale to pilot-scale systems. By increasing membrane area and using a stacking approach, the FCDI modules were successfully scaled up and achieved a salt transfer rate comparable to lab-scale systems. This provides a foundation for future assessments of energy demand and economics.
Article
Engineering, Chemical
Mona Gulied, Sifani Zavahir, Tasneem Elmakki, Hyunwoong Park, Guillermo Hijos Gago, Ho Kyong Shon, Dong Suk Han
Summary: This study introduces a novel hybrid system that combines direct contact membrane distillation (DCMD) and electrically switched ion exchange (ESIX) to facilitate seawater reverse osmosis (SWRO) brine enrichment and selective lithium recovery.
Article
Engineering, Chemical
Zhiqiang Zhang, Ruifeng Deng, Jiao Zhang, Lu She, Guangfeng Wei, Renyong Jia, Pengyu Xiang, Siqing Xia
Summary: A transmembrane electro-chemisorption system with authigenic acid and base was developed for enhancing ammonia recovery from strong ammonia wastewater. The system efficiently transformed ammonium into free ammonia, which was then adsorbed and recovered through transmembrane chemisorption. This system yielded pure (NH4)2SO4 product and produced valuable byproducts of pure hydrogen and oxygen. Higher applied voltage resulted in better ammonia recovery.
Article
Engineering, Chemical
Alena Popova, Sandrine Boivin, Takuji Shintani, Takahiro Fujioka
Summary: This study aimed to produce a high-integrity RO membrane by forming a polyamide skin layer on a TE support layer, in order to enhance the integrity of the membrane and improve the microbiological safety of potable water reuse.
Article
Engineering, Chemical
Sanjana Yagnambhatt, Saber Khanmohammadi, Jonathan Maisonneuve
Summary: This study investigates the concept of using heat to enhance reverse osmosis (RO) desalination. The effect of temperature on water permeate flux, specific energy, permeate quality, and applied operating pressures is evaluated using an analytical model. The results suggest that under specific conditions, the tradeoff between savings in mechanical pump work and thermal energy input in thermally-enhanced RO can be favorable, leading to overall energy savings.
Article
Engineering, Chemical
Jiangju Si, Chenrui Xue, Shun Li, Linchao Yang, Weiwei Li, Jie Yang, Jihong Lan, Ningbo Sun
Summary: To meet the huge demand for lithium resources, there is an urgent need to develop a new efficient technology for lithium recovery from salt-lake brines. In this study, a selective membrane capacitive deionization system is reported, which achieves high lithium recovery capacity and rate through the use of materials with efficient intercalated pseudo-capacitance and a high specific area porous carbon. The use of a modified thin-coated membrane allows for selective Li+ recovery, and adjusting the concentrations of Li+ and Mg2+ in the feed solution enables higher Li+/Mg2+ selectivity.
Article
Engineering, Chemical
Mohamed R. Salem, R. Y. Sakr, Ghazy M. R. Assassa, Omar A. Aly
Summary: This research proposes a new method of using wasted thermal energies as an additional heating source for solar still distillation units (SSDUs) to increase productivity and reduce pollution and global warming. By testing two SSDUs, the study shows that heating airflow can raise temperatures, enhance freshwater production, and improve system thermal efficiency.
Article
Engineering, Chemical
Qimeng Sun, Miao Sun, Linyan Yang, Yuan Gao, Xinghai Zhou, Lihua Lyu, Chunyan Wei
Summary: This study presents an innovative design and fabrication of a fabric-based conical roll (FCR) evaporator, which enables low-temperature evaporation and achieves high evaporation efficiency with excellent thermal management ability. The evaporator has demonstrated advanced light-harvesting capability and can produce freshwater that meets drinking water standards, showing great potential for applications in desalination and sewage treatment.
Article
Engineering, Chemical
Yidong Zhang, Wangfang Deng, Meiyan Wu, Chao Liu, Guang Yu, Qiu Cui, Pedram Fatehi, Chunlin Xu, Bin Li
Summary: In this study, a novel polydopamine-functionalized lignin-containing pulp foam evaporator with high-efficiency desalination and multi-contaminant adsorption capabilities was designed. The foam evaporator showed excellent light absorption, water absorption, thermal conductivity, and chelation abilities, allowing for solar evaporation and contaminant adsorption synergistically. It also exhibited potential applications in metal ion concentration and contaminated seawater treatments, and demonstrated superior biodegradability compared to poly-styrene foam. This foam material holds promise for developing multifunctional photo-thermal systems for solar-driven water purification.
