Article
Engineering, Chemical
Xu Zhu, Lei Zhu, Hui Li, Chunyu Zhang, Jinwei Xue, Ran Wang, Xurong Qiao, Qingzhong Xue
Summary: The PVA hydrogel nanofibrous membrane achieves sustained separation capability in oil-water emulsion separation through the SCD method, indicating great potential for practical applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Xu Zhu, Jianqiang Zhang, Lei Zhu, Ran Wang, Shang Gan, Jinwei Xue, Xilu Liu, Hui Li, Qingzhong Xue
Summary: This study introduces a method of using solid waste to treat liquid waste, where a negatively charged hydrogel-coated recycled wet wipe is used to effectively treat oily wastewater, absorb cationic dyes, and heavy metal ions, providing both environmental and economic benefits.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ran Wang, Xu Zhu, Lei Zhu, Hui Li, Jinwei Xue, Shifan Yu, Xilu Liu, Shaopeng Gan, Qingzhong Xue
Summary: The article introduces a method for treating oily wastewater using a polyurethane sponge that can adsorb anionic surfactant molecules, destabilize the oil-water interface, and achieve the separation of oil droplets and removal of dyes and metal ions in wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Qingbo Huang, Song Liu, Yanan Guo, Gongping Liu, Wanqin Jin
Summary: In this study, a graphene oxide (GO) membrane with charged interlayer channels was developed for the separation of mono-/di-valent ions. The membrane achieved selective transport of monovalent ions by utilizing size-sieving and electrostatic repulsion. The introduction of polyethyleneimine (PEI) into the interlayer channels not only controlled the charge property but also increased the hydrophilicity of the membrane surface. The optimal GO-PEI membrane exhibited high permeation rates and selectivity for monovalent ions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Jialu Zhang, Xiangfeng Huang, Yongjiao Xiong, Weiwei Zheng, Wanqi Liu, Mengfan He, Lexue Li, Jia Liu, Lijun Lu, Kaiming Peng
Summary: The study utilized bioinspired spider silk to construct a novel superhydrophilic electrospun nanofibrous membrane for highly efficient separation of nanoemulsions, achieving both high oil rejection and high permeate flux. The directional migration and coalescence of nano-sized oil droplets on spindle-knotted structures driven by Laplace force and the rejection of large oil droplets by the superhydrophilic nanofibrous membrane with negligible fouling were crucial in achieving the breakthrough results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Liang Wang, Jun Niu, Simeng Gao, Zhanjian Liu, Shiqi Wu, Mingxin Huang, Hairui Li, Mingliang Zhu, Ruixia Yuan
Summary: Untreated emulsified oil wastewater can cause severe damage to the environment. The deformation of emulsion interfacial film is still a major challenge for bio-inspired superhydrophilic membrane, leading to post-processing of membrane concentrates. Moreover, conventional self-cleaning strategies have difficulties in mitigating fouling deep inside membrane pores, creating another challenge for long-term operation. To overcome these limitations, a novel electro-Fenton assisted superhydrophilic membrane was designed, achieving high permeation flux and effective oil/water separation through real-time degradation of foulants and electrostatic repulsion forces.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Qiuxia Fu, Dandan Xie, Jianlong Ge, Wei Zhang, Haoru Shan
Summary: Novel negatively charged composite nanofibrous hydrogel membranes (NHMs) are obtained by a combination of electrospinning and surface coating modification. These NHMs have controllable morphologies and chemical structures, and exhibit high protein adsorption capacity, resistance to acid and solvents, good selectivity, and regenerability. They provide a new chromatography platform for protein purification in biopharmaceuticals and biochemical reagents.
Article
Chemistry, Multidisciplinary
Haodong Zhao, Yali He, Zhihua Wang, Yanbao Zhao, Lei Sun
Summary: A novel, simple and low-cost method has been proposed for the separation of emulsion containing surfactants. The PDA@PAN nanofibrous membrane exhibits superhydrophilicity and excellent oil-water separation ability, with a separation efficiency of 96.1% for n-hexane/water emulsion. Furthermore, it shows good recycling performance after 10 cycles of separation.
Article
Engineering, Environmental
Xuewu Huang, Zefeng Wu, Shu Zhang, Wei Xiao, Lulu Zhang, Ling Wang, Huaiguo Xue, Jiefeng Gao
Summary: Water pollution caused by oil leakage or oily sewage poses a serious threat to the environment and human health. Scientists have developed a mechanically robust Janus membrane using carbon nanotubes decoration and nanofibrous membrane integration, which can efficiently purify different types of oily wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Yunpeng Yue, Yasuhito Mukai
Summary: In this study, a hierarchically structured polyacrylonitrile (PAN) nanofibrous membrane was fabricated and used for efficient separation of oil droplets from water. The membrane with a skin layer exhibited a separation ratio of over 99.4% and a permeation flux of 7,059 L m-2h-1 for surfactant-stabilized emulsions (SSEs). Long-term separation experiments demonstrated its continuous separation capability. These findings highlight the potential of hierarchically structured membrane for separating emulsions and suggest its promise for the industrial separation of oily wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Xian Jiang, Fuchao Yang, Guang Xu, Qinghong Zeng, Pengcheng Tang, Zhiguang Guo, Weimin Liu
Summary: In recent years, there is an urgent need to remove low surface tension oil from oily wastewater. Double layer hydroxides have been found to have hydroxide-rich surface and good hydrophilicity, and can exert charge on oil-in-water emulsions for efficient separation. Inspired by this, NiAl-LDHs were prepared on stainless steel mesh by hydrothermal method, and a Janus membrane was prepared for on-demand separation of various emulsions and oil-water mixtures. The prepared membrane maintains excellent performance after multiple cycles of separation and exhibits high repellency to harsh environments.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yajie Ding, Bihan Hu, Liwei Zhuang, Jianqiang Wang, Jindan Wu, Fu Liu, Jiping Wang
Summary: The developed PVDF membrane compensated with PHEMA and PDMS achieved long-lasting and efficient separation for viscous emulsions through chemical coordination phase separation, showing excellent fouling resistance and release properties.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Jiangtao Hong, Jiayao Wang, Qian Wu, Hao-Nan Li, Qiang Weng, Qun-Yi Hu, Zhi-Liang Xu, Jing Yang, Yongjin Li
Summary: A Janus membrane with a thickness-controllable Nafion-modified layer was fabricated through controlled solution decoration using restricted diffusion induced by countercurrent heating. The membrane can demulsify oil-in-water emulsions and separate and recover oil through the membrane. The Nafion-modified coating enhances thermal and chemical stabilities with uncompromised wettability.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Jiahui Gu, Zhou Qu, Xiangning Zhang, Hongwei Fan, Chunxi Li, Juergen Caro, Hong Meng
Summary: Achieving a water-oil interface imbalance is important for the demulsification of water-in-oil emulsions. Conventional demulsifying membranes break the interface balance using high transmembrane pressure. This study presents a contact demulsification concept using a novel demulsifying membrane with a superhydrophobic surface. The membrane shows excellent separation efficiency and high flux even for nanoscale water-in-toluene emulsions. This concept paves the way for developing next-generation demulsifying membranes for water-in-oil emulsion separation.
Article
Chemistry, Physical
Yunpeng Yue, Motoki Hara, Yasuhito Mukai
Summary: Polyacrylonitrile (PAN) nanofibrous membrane with a three-dimensional network structure and high porosity was used to efficiently separate oil droplets smaller than 10 μm, achieving a separation ratio greater than 99.9%. The continuous separation process showed stable performance and low pressure drop. Furthermore, the membrane prevented oil droplets from forming a cake layer, ensuring long-term use. This study demonstrates the promising application of nanofibrous membranes in industrial wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(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)