CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dandan Chen,Qianqian Liang,Feng Gao,Tianyu Liu,Yunqi Wu,Zhuo Zheng,Jian Kang,Ruizhang Xu,Ya Cao,Ming Xiang
Superior permeability and high selectivity are crucial performances criterion for reverse osmosis (RO) membranes. Inspired by aquaporin-based biomimetic membranes, the loose liposomes as artificial water channels were prepared by thin-layer hydration method with lyso -phospholipids (C14lyso) and cholesterol followed by incorporating liposomes into the polyamide selective layer via in situ interfacial polymerization to fabricate liposomes-based RO membranes (TFC-C14lyso). Stopped-flow tests verified that C14lyso liposomes possess fast water transportability and the effect of C14lyso liposomes on the intrinsic structure of the polyamide selective layer was comprehensively explored. Meanwhile, the structure and performance of the TFC-C14lyso membranes could be regulated by varying the liposome concentrations. As a result, TFC-C14lyso-2 (the concentration of C14lyso liposomes is 0.25 mg/mL) presented an optimal separation performance, showing high water permeance of 3.80 L m −2 h −1 bar −1 and NaCl rejection of 98.6 %. Moreover, the separation mechanism regarding the enhanced permeability of TFC-C14lyso-2 was profoundly revealed via the structure and performance comparison with TFC-DOPC fabricated by incorporating dense DOPC liposomes into its PA selective layer. Building on these studies, our work may provide a facile and versatile pathway for designing advanced membranes in desalination.
研究领域:
生物工程
·
材料科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Jing Dou,Shuo Han,Saisai Lin,Zhikan Yao,Lian Hou,Lin Zhang
Enhancing the water permeation while maintaining high salt rejection of existing reverse osmosis (RO) membranes remains a considerable challenge. Herein, we proposed to introduce polymer of intrinsic microporosity, PIM-1, into the selective layer of reverse osmosis membranes to break the trade-off effect between permeability and selectivity. A water-soluble a-LPIM-1 of low-molecular-weight and hydroxyl terminals was synthesized. These designed characteristics endowed it with high solubility and reactivity. Then it was mixed with m -phenylenediamine and together served as aqueous monomer to react with organic monomer of trimesoyl chloride via interfacial polymerization. The characterization results exhibited that more “nodule” rather than “leaf” structure formed on RO membrane surface, which indicated that the introduction of the high free-volume of a-LPIM-1 with three dimensional twisted and folded structure into the selective layer effectively caused the frustrated packing between polymer chains. In virtue of this effect, even with reduced surface roughness and unchanged layer thickness, the water permeability of prepared reverse osmosis membranes increased 2.1 times to 62.8 L∙m −2 ∙h −1 with acceptable NaCl rejection of 97.6%. This attempt developed a new strategy to break the trade-off effect faced by traditional polyamide reverse osmosis membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2020
·
IF 4.499
Shengjian Xiao,Zihe Li,Qinmei Xiong,Chongde Wu,Jun Huang,Rongqing Zhou,Yao Jin
This work explored the feasibility of sodium lactate as a novel draw solute to conduct the forward osmosis (FO) process in the field of food processing. As a common low-cost food addictive, sodium lactate is non-toxic and shows high osmotic pressure . Based on this knowledge, the results of this work further revealed the combinative effect of osmotic pressure and viscosity of sodium lactate solution on the FO performance. The effect of draw solution concentration, membrane orientation and temperature on the FO performance were also investigated. The results revealed that a maximal average water flux of 56 LMH was reached during the FO experiments with sodium lactate as draw solute. Taking into account the average water flux and the reverse solute flux, 7.1 M was the optimal concentration of the sodium lactate solution for FO process. The application of such draw solution into the concentration of sugar solution and orange juice then validated its promising performance in terms of efficiency, food quality preservation and membrane regeneration.
研究领域:
食品科学
·
生物工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2025
·Vol. 151
·期 4
·04025011
·
IF 1.6
Negar Arabi,Deniz Kavrar Ürk,Sevde Korkut,Hulya Cebeci,Ismail Koyuncu,Bihter Zeytuncu Gökoğlu
The trade-off between permeability and selectivity of the conventional type of thin-film composite (TFC) reverse osmosis (RO) membranes is known as one of the critical issues that has caused many concerns during the last decade. The introduction of an interlayer onto the porous substrates in TFC membranes before the interfacial polymerization (IP) process has been defined as an effective technique that enhances the TFC membranes’ performance and breaks the trade-off between permeability and selectivity of common TFC membranes. Few studies have been conducted in recent years investigating multiple types of materials that have been applied as an interlayer in TFC membranes. In this case, multiwalled carbon nanotubes (MWCNTs) were used to prepare interlayer-based TFC membranes with both excellent water permeability and salt selectivity. The TFC membranes containing functionalized CNT nanoparticles (NPs) as an interlayer lead to the construction of a thin, smooth, and crumpled selective layer, which improves the TFC membranes’ permeation performance. The water permeability of CNT interlayer-based TFC membranes was reported at about 11.88 L m−2 h−1, which is 2.85 times greater than common TFC membranes without an interlayer. Also, due to the superior crosslinking degree of these interlayer-based PA TFC membranes, they show excellent rejection of various salts compared to other RO membranes.
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
·
2021
·
IF 8.742
Yingying Liu,Haowen Wu,Zhi Wang,Jixiao Wang
Solvent activation before heat treatment is an effective way to fabricate a more permeable polyamide (PA) reverse osmosis (RO) membrane. However, this method usually induces a decrease in selectivity due to the excessive swelling and dissolution of PA. A facile strategy of regulating solvent activation by the mechanical force was proposed in this work. With this strategy, the mechanical force was applied to the partial region of membrane surface before solvent activation to strengthen the interactions between the PA fragments and the PA, which would reduce the dissolution of partial PA fragments and alleviate the swelling of PA during activation for higher selectivity; while the region of membrane surface without applying mechanical force would be activated by solvent normally for high permeability. The desalination performances of the RO membranes for both brackish water and seawater were evaluated. The results verified that the membrane prepared by regulating solvent activation had a higher rejection and a comparative flux compared to the membrane activated by solvent directly. This work provides a facile way to fabricate the advanced RO membrane by regulating solvent activation.
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
ACS Applied Nano Materials
·
2020
·
IF 0
Yue Wen,Xingran Zhang,Xuesong Li,Zhiwei Wang,Chuyang Y. Tang
Widespread applications of reverse osmosis (RO)-based processes call for high-performance thin-film composite (TFC) membranes. In this study, a TFC membrane by incorporating an ultrathin 2D metal–organic framework (MOF) (ZnTCPP) interlayer was developed for water purification, and the mechanisms in enhancing membrane permeability and selectivity were revealed. The introduction of the 2D MOF nanosheet interlayer nearly tripled the membrane water permeance (4.82 ± 0.55 L m–2 h–1 bar–1) with a simultaneous increase of NaCl rejection (97.4 ± 0.6%) compared to the control, successfully overcoming the permeability–selectivity trade-off. The combined use of quartz crystal microbalance and transmission electron microscopy revealed that the MOF interlayer induced the significant changes in the polyamide membrane structure that favors water permeation, i.e., decreased intrinsic thickness, increased void volume fraction, and enhanced effective filtration surface area. Such improvements in the polyamide structure can be attributed to the synergistic effects of enhanced confinement to interfacially degassed nanobubbles and reduced diffusivity of m-phenylenediamine monomers due to the MOF interlayer. This interlayer also increased the cross-linking degree of the polyamide layer (contributing to the increase of membrane selectivity) and served as a gutter layer (to further enhance membrane permeance by reducing the geometric restriction of the support layer). Our study highlights the potential of using ultrathin MOF nanosheets to fabricate high-performance TFC membranes for desalination and water purification.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haoyan Li,Chunling Liu,Jiale Zhang,Shenxiang Zhang,Xinjian Feng,Jian Jin
To enhance the water permeability of polyamide (PA) based reverse osmosis (RO) membranes, nanomaterials have been integrated into the polyamide layer during the interfacial polymerization process. However, challenges such as nanoparticle aggregation and uneven dispersion in the PA layer continue to present significant obstacles. In this study, we report a novel printing technique to fabricate thin-film nanocomposite (TFN) membrane that uses an electrospray method to deposit covalent organic framework (COF) nanosheets and monomers for PA polymerization onto a substrate. The COF nanosheets are evenly doped within the polyamide layer. The doping amount of COF nanosheets can be rationally controlled by printing times and dispersion concentration. When the COF nanosheet loading mass is 0.39 μg cm −2 , the printed TFN membrane shows water permeance of 2.41 L m −2 h −1 bar −1 and NaCl rejection of 98.4 %. Water permeance increases 81.2 % compared with that of without doping COF nanosheets. Moreover, thanks to the negatively charged smooth surface constructed by the printing method, the TFN membranes demonstrate superior resistance to fouling compared to commercial RO membranes. This work proposes a novel methodology for the fabrication of high-performance nanocomposite membranes.
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
VACUUM
·
2021
·
IF 3.627
Dong-Guang Liu,Ting-Ting Yang,Yu-Lan Liu,Lai-Ma Luo,Yu-Cheng Wu
Tritium permeation is an essential challenge that should be solved in fusion reactors. In this study, the inner wall SiO 2 coating of the 316L stainless steel pipeline for tritium permeation barrier (TPB) is prepared by slurry-spraying method. The microstructure, phase composition, thermal shock resistance, and hydrogen permeation resistance of the SiO 2 coating are investigated. Results show that the coating is amorphous SiO 2 , and the coating is bonded well to the substrate and the thickness of the coating is about 10–15 μm. After six thermal shock treatments, the SiO 2 coating exhibit good thermal shock resistance stability below 700 °C. Results from the hydrogen penetration test indicate that the hydrogen resistance capability of the SiO 2 coating is 16-fold higher than that of the 316L stainless steel substrate. Hydrogen resistance is also 6-fold more stable than that of 316L stainless steel. These characteristics improve significantly the hydrogen resistance performance of the 316L stainless steel substrate.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Xue Hu,Zhiying Li,Jianbo Li,Chuanlong Jin,Junjiang Bao,Xiaopeng Zhang,Xiaobin Jiang,Ning Zhang,Gaohong He
Membrane technology exhibits low cost and high efficiency in gas separation. Zeolite-imidazole framework-67 (ZIF-67) membrane shows a theoretically superior performance in H 2 /CO 2 separation, owing to its effective size-sieving pores between H 2 and CO 2 . However, the gas molecules are permeate through a series of consecutive crystal cells of common ZIF-67 polycrystalline membranes, resulting in high transport resistance to the gas permselective transport. To this end, this work employs a contra-diffusion synthesis to construct a honeycomb ZIF-67 (h-ZIF67) crystalline membrane for low-resistance H 2 /CO 2 permselective transport. The controlled growth of h-ZIF67 following the van der Drift theory produces the honeycomb polycrystal with hierarchical channels for low-resistance gas permeation. The prepared membrane with micron-scale thickness still achieves a H 2 permeance as high as 1.6 × 10 −7 mol m −2 s −1 Pa −1 and a H 2 /CO 2 selectivity of 17, which can be maintained after a long-term operation for the H 2 /CO 2 mixture separation.
研究领域:
材料科学
·
化学工程
·
气体分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yonghong Wang,Kaixin Wang,Xinru Zhang,Jinping Li
Carbon molecular sieve (CMS) membranes are widely used for the separation of similar molecular kinetic diameter gas. However, their performance is limited by a large amount of discontinuous porous structures and a few adsorption affinity sites. Herein, we first prepared magnetic Co@NC@ZIF-8 nanoparticles , followed by introducing it into the polyimides matrix to design precursor membrane with vertical nanochain-like particle distribution by magnetic field induction. Afterwards, hybrid carbon molecular sieve (HCMS) membranes were prepared by pyrolyzing precursor with high-temperature under N 2 atmosphere, which had ordered microporous architecture and Co-N-C structure. Resultant HCMS membranes prepared by magnetic field induction had excellent gas separation performance, whose CO 2 , N 2 and CH 4 permeabilities were 27,050, 2614 and 622 Barrer, with CO 2 /N 2 , CO 2 /CH 4 and N 2 /CH 4 selectivities of 10.4, 43.5 and 4.2 respectively. These values far exceeded 2019 CO 2 /CH 4 and 2008 N 2 /CH 4 upper bounds as well as approached 2008 CO 2 /N 2 upper bound. The superior performance resulted from the vertically ordered nanochain-like channels for gas transport, which dramatically shortens the transport path of gas molecules to intensify shape sieving potential. Moreover, the Co-N-C structure on the wall of channels could facilitate CO 2 transport due to the π complexation. Additionally, a large quantity of nitrogen sites in the carbonized Co@NC@ZIF-8 enhance CO 2 adsorption selectivity owing to the acid-base interaction. More remarkably, after 30-day aging testing, it was found that HCMS membranes prepared by magnetic field induction had exceptional aging resistance compared to the pristine CMS membranes and one without magnetic field induction under the same aging environments.
研究领域:
材料科学
·
化学工程
·
膜技术
·
气体分离
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhi Geng,Shiqiang Liang,Meng Sun,Chuhan Liu,Nan He,Xia Yang,Xiaochun Cui,Wei Fan,Xianze Wang,Yang Huo
The internal concentration polarization (ICP) of asymmetric osmotic membranes with support layers greatly reduced membrane water permeability, therefore compromising membrane performance. In this study, a series of free-standing symmetric hybrid forward osmosis (FO) membranes without experiencing ICP were fabricated by covalently linking metal–organic framework (MOF) nanofillers with a polymer matrix. Owing to the introduction of MOFs, which allow only water permeation but reject salts by steric hindrance, the prepared hybrid membranes could approach the empirical permeability-selectivity trade-off. The optimized hybrid membrane displayed an outstanding water/Na2SO4 selectivity of ∼1208.4 L mol–1, compared with that of conventional membranes of ∼375.6 L mol–1. Additionally, the fabricated hybrid membranes showed excellent mechanical robustness, maintaining structural integrity during the long-term FO separation of high-salinity solution. This work provides an effective methodology to fabricate high-performance, symmetric MOF-based membranes for osmotic separation processes such as seawater desalination and water purification.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Pengbo Zhao,Bowen Yao,Junquan Meng,Rui Zhang,Bing Cao,Pei Li
Pervaporation (PV), as a cost-efficient concentrating process, has been studied for Zero Liquid Discharge (ZLD) of desalination. Although high water flux and excellent salt rejection have been reported for many PV membranes. The desalination performance, fouling behavior, and cleaning protocol for treating real reverse osmosis concentrate (ROC) generated from industrial plants have never been studied. Meanwhile, understanding the fouling behavior and cleaning method in the treating process is crucial for the development of suitable PV desalination membranes. In this study, we used a lab-made PV membrane to treat industrial ROC with a high chemical oxygen demand (COD) value and high salt concentrations. The results showed that conductivity and COD of the produced water were below 20 μs/cm and 70 mg/L, respectively, which fulfilled the discharge standard. However, the membrane fouling problem was not trivial. To address the fouling issue, a chemical softening method was adopted to remove the calcium salts of the ROC, and a membrane cleaning method was developed to regenerate the water flux. As a result, a long-term water flux of 31.27 kg/m 2 ·h with a flux recovery rate of 98% were realized. This highlights the potential of PV desalination technology for ROC reclamation.
研究领域:
环境科学
·
材料科学
·
水处理工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）