JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Miaolu He,Leihao Feng,Jin Wang,Yunlong Gao,Weiting Zhang,Lujie Nie,Jiajin Hao,Jiaqi Wang,Rui Miao,Lei Wang
Recently, low-energy forward osmosis (FO) technology has been employed in the lithium concentration stage during the extraction of lithium from brine sources. The interlayer FO membrane is renowned for its exceptional structural characteristics; however, challenges remain in selecting suitable interlayer materials and exploring their control mechanisms on amine monomers. As interlayer materials, traditional 3D nanomaterials are prone to detachment, while traditional 2D materials without micropores can increase the transmission resistance of water molecules. This study introduces a novel FO membrane utilizing Zr-BTB nanosheets with 5.4 Å micropores as the interlayer material. Based on detection and simulation calculations, it was found that the increase in steric hindrance and interaction forces jointly slowed the diffusion of amine monomers in the presence of the Zr-BTB interlayer. This results in a thinner separation layer, facilitating water transport. The interlayer also plays crucial roles in preventing defective pore formation in the separation layer and assisting in intercepting salt ions. The Zr-BTB interlayer membrane exhibited a water flux of 29.14 L m −2 h −1 and a reverse salt flux of 0.16 g m −2 h −1 , which are superior to those of many FO membranes reported in the field. The prepared membrane also has excellent performance in lithium concentration applications, and its separation mechanism was explored by MD simulations.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 6
·2906-2914
·
IF 2.936
Xiaoqin Yin,Kang Guan,Peng Gao,Cheng Peng,Jianqing Wu
A method called the precursor film firing method is proposed to improve the permeance of ceramic microfiltration membranes by avoiding intermediate layer and dip-coating process, and efficiently control the thickness of the separation layer. In this method a precursor film is prepared independently of the support by a film coating machine. This precursor film consists of two layers: Al2O3/PVA layer made of Al2O3 powder and polyvinyl alcohol (PVA), and polyvinyl butyral (PVB) layer. The precursor film is pasted on the support and fired to obtain membranes. Because the intermediate layer and dip-coating process are avoided in this method, the fabricated membranes show high permeance. For the fabricated membrane with average pore size = 0.18 μm and separation layer thickness = 10.7 μm, the permeance is 3890 L m−2 h−1 bar−1. Also the separation layer thickness can be controlled efficiently. And the precursor film can be used on fabricate curved membranes such as cylindrical membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 40
·1-18
·
IF 3
Wan Xu,Shengyuan Zhao,Huijuan Zhang,Fangfang Niu,Xingsheng Liu,Zhenbin Chen,Yuan Sun
With the continuous depletion of global rhenium resources, the separation and purification of rhenium (Re) from secondary resources became very important. Herein, an imprinted composite membrane with “flexible chain” thermo-responsive imprinted separation layer structure (Re-TIICM) was prepared to achieve selective separation and recovery of Re from secondary resources with complex composition. Re-TIICM's thermo-responsive imprinted separation layer occurred sol/gel phase transition by adjusting the temperature, which effectively mitigated the trade-off between selectivity and desorption. The structure and performance of Re-TIICM under optimum process conditions were tested and evaluated. The results showed that Re-TIICM exhibited a maximum adsorption capacity of 0.1036 mmol/g at 35°C, a separation degree of 4.37 (MnO 4 − as disturbing ions), and remained good adsorption capacity and selectivity after 9 adsorption/desorption cycles. When Re-TIICM was applied in secondary resources, the purity of Re increased from 35.412% to 70.208% after one adsorption/desorption cycle, showing a great potential for industrial applications.
研究领域:
材料科学
·
环境工程
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhouyi Zhu,Chunyu Fan,Minghui Qiu,Xianfu Chen,Yiqun Fan
Barium titanate (BaTiO 3 ) has received extensive attention due to its lead-free composition and excellent piezoelectric properties, enabling the build-in ultrasonic and anti-fouling performance in membrane separation processes. In this study, an asymmetric membrane consists of an alumina separation layer and a barium titanate carrier was successfully prepared for the first time, achieving dual anti-fouling properties through surface screening and in-situ ultrasound. By selecting appropriate barium titanate powder and optimizing the sintering temperature and polarization conditions, the trade-off effect between piezoelectricity and permeability was resolved, providing a good carrier for the asymmetric membrane. The alumina separation layer was fabricated on the barium titanate carrier by optimizing the slurry coating process and heat-treated at 950 °C to achieve sufficient integrity. The pore size of the alumina separation layer in the prepared Al 2 O 3 /BaTiO 3 asymmetric membrane is 24 nm, which is smaller than the 496 nm of the barium titanate carrier. Under a 20 V alternating voltage, the piezoelectric response signal is 35 mV. Additionally, the anti-fouling performance of the asymmetric membrane was evaluated through filtration experiments on a water-in-oil emulsion. When applying a 60 V alternating voltage, the membrane flux was essentially maintained at its initial value.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chenyang Song,Yaoyao Jiao,Zihan Tian,Qingqing Qin,Shuhao Qin,Jing Zhang,Jianxin Li,Zhenyu Cui
To apply membrane separation technology to the treatment of low-concentration heavy metal ion wastewater, it is essential to fabricate a nanofiltration (NF) membrane with high flux and excellent rejection. In this work, organics (polyethyleneimine, gallic acid, trimesic acid, and polyacrylic acid) with different charges were successively introduced onto the outer surface of hollow-fiber NF membranes via chemical modification. That regulated the membrane surface charge under the premise of maintaining a loose separation layer. A negative-positive dual-charged membrane with a large mean effective pore size and long charged channels was successfully constructed. The evolution regularity of the microstructure of the separation layer was explored. The relation between a microstructure for a negative-positive dual-charged layer and low-concentration CuSO 4 removal was interpreted. An effective removal (94.2%) was achieved while maintaining a high permeability (29.6 L m −2 h −1 bar −1 ). Also, the as-prepared membrane showed good acid resistance and an excellent anti-fouling property and regeneration ability after cleaning by sulfuric acid. The flux recovery ratio and rejection recovery ratio were as high as 96.9% and 99.2% respectively. This work provides a reference for fabricating high performance hollow-fiber NF membranes to effectively remove heavy metal ions with low-concentration.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Zhaoqian Zhang,Hao Sun,Shaopeng Xin,Qiaoxia Hu,Jian Wang,Yunxia Hu
Precise separation of small organic molecules and electrolyte salts is critical for various industrial processes, necessitating advanced membranes with uniform pores. Proteins, as one typical nature polymer having the exactly same structure and molecular weight, offer a promising material for making such membranes. Here, hemoglobin (BHb) and lysozyme (Lyz) are utilized to fabricate precise nanofiltration membranes through amyloid-like co-assembly, triggered by Tris(2-carboxyethyl) phosphine. Molecular dynamics simulations reveal that BHb intercalates between Lyz molecules, enhancing tight assembly and reducing defects. The Lyz/BHb membrane exhibits a high void volume of 27.2% and achieves an exceptional permeance of 335 L m −2 h −1 bar −1 . Amazingly, the Lyz/BHb membrane achieves ultra-selective molecular sieving of dyes and salts with an unparalleled high separation factor of 1.25 × 10 3 for the NaCl/Brilliant blue. The unique adaptive separation layer is formed by anchoring dye molecules into the larger pores and thus narrowing down the pore size distribution and enhancing electrostatic repulsion, endowing the membrane with a distinctive molecular sieving of dyes and salts. This study offers valuable insights to finely tailor the pore structure of the membrane by co-assembly of proteins and to significantly enhance the membrane perm-selectivity by creating an adaptive protein separation layer with a unique molecular sieving property.
研究领域:
生物化学
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材料科学
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Yanan Yao,Tianyi Xia,Jiaci Wang,Zhuan Yi,Wentao Yan,Yong Zhou,Congjie Gao
Reverse osmosis (RO) membrane technology has widespread applications in many fields, such as desalination and organics removal. A long-standing goal for RO membrane technology is developing highly permeable RO membranes with high rejection. Upgrading of the separation layer microstructure is the key. One ideal design for the separation layer microstructure is that the layer is rich in fast water transport channels and meanwhile the polyamide (PA) networks are highly selective. The simplest strategy to increase fast water transport channels is introducing functional materials into the separation layer via the aqueous or organic phase addition. The organic phase addition method is more effective. However, most functional materials reported cannot be dissolved or dispersed well in the organic phase, which are not suitable for this method. Besides, the attentions that PA network received were less than functional materials in the past, though it is crucial for the rejection. This work proposes to construct the kind of separation layer mentioned above via introducing a porous organic cage (CC3), which is an intrinsically porous organic molecule with oil solubility, in the separation layer as the supplier for fast water transport channel by the organic phase addition method, and with the aid of an oil-soluble surfactant, which contributes to the formation of highly selective PA networks through surfactant-assembly regulated interfacial polymerization. Our strategy is efficient. By using a tiny amount of CC3 (0.005 % w / v ) and surfactant (0.0025 % w/v), a flux of 93.6 L·m −2 ·h −1 (an increase of 43.1 %), a salt rejection of 98.82 % and a water/salt selectivity of 7864 can be achieved. This performance is at high level for a desalination RO membrane. Simultaneously, the developed RO membrane exhibited an improved removal performance for organic compounds with low molecular weight (<300 Da). The organics rejection exceeded 91.00 %.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Juexin Wang,Yangxiang Huang,Lixin Xue,Xinqi Gu,Jing He,Yeqiang Lu,Congjie Gao
Cross substrate interface polymerization (CSIP) processes were developed to construct polyethylene (PE) based thin film composite nanofiltration (NF) membranes with internally confined polyamide (i-PA) separating layers protected by external covering PE filaments, possessing rougher top surfaces, more negative surface zeta potential, reduced and narrowly distributed pore sizes. Cationic surfactant CTAB reacted with TMC and formed hydrophilic but insoluble BTC(CTA) n /CTAB coating inside the PE substrate to facilitate water permeation. The contact time of monomer solutions on PE substrates affect the membrane performance by controlling the quality of i-PA layers and amount of BTC(CTA) n /CTAB coating underneath. PE(O/W) NF membranes from CSIP processes with i-PA layers had rougher surface, lower zeta potential, smaller average radius μ p (0.374 nm) and lower geometric deviation (1.43), leading to higher Na 2 SO 4 rejection (96.4 %) and water permeance (20.36 L m −2 ·h −1 ·bar −1 ), maintaining excellent anti-wearing, flux recovering and operating stability.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Chabi Noël Worou,Jing Kang,Taofic Bacharou,Jimin Shen,Pengwei Yan,Arcadius Degan,Yingxu Gong,Razack Guene,Zhonglin Chen
A single dual thin-film titanium-zirconium as selective layers membrane for divalent and monovalent ions removal was fabricated. Both dioxide of titanium (TiO 2 ) and dioxide of zirconium (ZrO 2 ) have been co-deposited on an ultrafiltration polyacrylonitrile membrane using information given by scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDS). The important insights provided by SEM associated with EDS on the arrangement and potential functions of nanoparticles (NPs) due to their unambiguous chemical signal were used for characterization and modification of membrane surface at an atomic scale. Thus, a novel thin-film composite-nanofiltration membrane (TFC-NFM) has been performed for the first time. The new-born organic–inorganic membrane NF-TiZr exhibited excellent performance rejection towards monovalent ions and its rejection rate for multivalent ions reached 95%. The order of salts rejection was CaCl 2 > MgSO 4 ~ MgCl 2 > NaCl > Na 2 SO 4 . The permeate flux of the NF-TiZr membrane is as high as 58 L m –2 h –1 . 180 h-continuous exploitation of NF-TiZr showed a slight variation of permeate flux less than 1.2% and the salt rejection remained high than 92.5% at the end of the operation. To our best knowledge, it is the first time SEM was combined with EDS to help for optimal co-deposition of nanoparticles on the membrane surface. This study may provide useful insights to design next-generation NFMs.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Nina Yan,Zhaogen Wang,Yong Wang
Separation membranes derived from block copolymers (BCPs) have attracted significant interest due to their well-defined pores and functional surfaces. However, it still remains a challenge to prepare ultrathin BCP composite membranes in an efficient way. Here we report a facile approach for the fabrication of ultrathin BCP composite membranes by forming thin films on water surface. The BCP layer as thin as ~ 17 nm can be prepared by spreading polystyrene- block -poly(2-vinyl pyridine) (PS- b -P2VP) solutions on water surface followed by controlled evaporation. The thin layer can be readily collected and composited with macroporous supports. A thickness of ~ 260 nm of the BCP layer is necessary to guarantee the integrity. Interconnected nanoporous structures are then obtained in the BCP layer by the process of selective swelling induced pore generation. On account of the ultrathin separation layer, the composite membranes exhibit excellent permselectivity, better than many other ultrafiltration membranes. Moreover, the separation performances can be facilely regulated by tuning the swelling durations. This method is featured as cost-effective and convenient, and is expected to provide a higher chance for the production of BCP membranes at large scale.
研究领域:
材料科学
·
膜分离技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Hang Yu,Dajian Cai,Shiyang Li,Congjie Gao,Lixin Xue
Tight ultra-filtration (TUF) membranes with in-situ grown zeolitic imidazole framework (ZIF) particles embedded in and packed under porous polysulfone (PSF) separating layers were prepared using non-solvent induced phase separation (NIPS) processes. Imidazole ligands contained in casting solutions were released and reacted with divalent Zn 2+ cations pre-loaded on non-woven fabric supporting layers. The capillary filling pore size and molecular-weight-cut-off (MWCO) Stokes solute rejection pore size of the formed ZIF/PSF TUF were tuned by varying the loading levels of Zn (II), polyvinylpyrrolidone (PVP) and imidazole, as well as the NIPS reaction time. With thinned PSF separating layer (200–500 nm) and embedding water permeating short-cuts from the ZIF particles, ZIF/PSF TUF membranes showed 7 times higher water permeance (up to 250 L/(m 2 h bar)) and greatly enhanced dye/salt retention selectivity, bearing high potential for applications in dye and textile waste water treatment processes.
研究领域:
膜科学
·
环境工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Lei Bian,Qianqian Wei,Jianxin Li,Jing Zhang,Shuhao Qin,Jingkui Yang,Zhenyu Cui
In this study, hollow fiber composite membranes were prepared by fabricating a hybrid separation layer on hollow fiber membranes outer surface through the combination of “anionic crosslinking and in-situ biomineralization”. The relationship between anions (molecular weight, M w and functionality, f u ) and the compactness of separation layers were analysed. The mode of in-situ biomineralization on surface, the formation and evolution of the hybrid layers were discussed. Using the strategy of anionic crosslinking and in-situ biomineralization, the compactness and filtration accuracy could be effectively enhanced, and the hydrophilicity of membrane surface was greatly improved. Dyes with low M w , such as methyl orange (327 g mol −1, 99.6 %, 21.2 L m –2 h −1 ) and methylene blue (319 g mol −1 , 99.2 %, 21.9 L m –2 h −1 ), can be rejected precisely while maintaining a high permeate flux. In addition, owing to the better acid resistance of the hybrid separation layer and the good adhesion between the separation layer and substrate, the membrane exhibited excellent chemical stability, long-term separation stability, and anti-fouling capacity. This study provides facile method for building separation layers with hybrid structures on hollow fiber membranes and a novel idea for designing hollow fiber composite membranes to separate dyes from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）