JOURNAL OF MEMBRANE SCIENCE
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2018
·
IF 6.578
Wenxuan Xu,Qingchun Ge
The potential of forward osmosis (FO) for water treatment can only be maximized with appropriate FO membranes . In this work, novel FO membranes functionalized with hydrophilic materials carrying both amine and sulfonate or carboxylate groups were synthesized via amidation reaction occurred on thin film composite (TFC) FO membranes. The performance of the newly explored FO membranes was evaluated in FO desalination and antifouling studies. Significant improvement in FO performance was observed for the novel FO membranes, in which the water flux increases more than 19% for the sodium taurine (ST) modified membrane (ST-modified membrane) relative to the pristine TFC FO membrane when pure water and 0.5–2.0 M MgCl 2 as the respective feed and draw solutions. Meanwhile, the ST-modified membrane produced a water flux 33% higher than that by the pristine TFC FO membrane in seawater (3.5 wt% NaCl) desalination with 2.0 M MgCl 2 as the draw solution, drastically increasing water recovery efficiency. The water flux decline of the ST-modified membrane is 46% lower than that of the pristine membrane with sodium alginate as a foulant. Introducing sulfonate or carboxylate ionic groups onto FO membrane surface is crucial to enhance the membrane antifouling ability and thus improves FO performance, which provides new insight in novel FO membrane exploration.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 17
·7920-7932
·
IF 8.867
Lina Xu,Jia Xu,Baotian Shan,Xiulin Wang,Congjie Gao
Novel thin-film composite (TFC) membranes were elaborately designed and fabricated via the incorporation of mussel-inspired dopamine (DA) into an m-phenylendiamine (MPD) aqueous solution followed by interfacial polymerization with trimesoyl chloride (TMC) on a macroporous substrate. This DA-incorporation strategy was distinct from the previous DA layer serving as a hydrophilicity–promoter or reactive intermedia. The elastic structure of the polyamide (PA) layer and the hydrophilicity of both the PA layer and substrate were in situ flexibly manipulated by regulating the DA/MPD mass ratio and solution pH. The optimized TMC/MPD–DA TFC membranes achieved a significantly enhanced water flux (50 L m−2 h−1, improved 3-fold compared to the conventional TMC/MPD membrane) and a comparable reverse salt flux of 8.19 g m−2 h−1 for forward osmosis (FO) using deionized water as the feed along with 1 M NaCl draw solution in the FO mode. It also yielded a superior water permeability (A) of 1.8 L per m2 per h per bar compared to the TMC/MPD membrane (1.0 L per m2 per h per bar) while maintaining a NaCl rejection of over 92% at 2 bar. The proposed synergistic interaction between DA and MPD in aqueous solution responding to the solution pH played a crucial role in controlling the interfacial polymerization process. Michael addition and Schiff base reaction between PDA and MPD at a proper pH (8.5) could weaken both the residual DA monomer and the PDA aggregate generation, facilitating the establishment of a defect-free and uniform PA layer with a proper cross-linking degree to enhance the water transport. This DA-incorporation strategy for the TFC membrane demonstrated here sheds light on the exploration of high water transport for highly efficient FO and other desalination processes.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Baochun Meng,Guozhen Liu,Yangyang Mao,Feng Liang,Gongping Liu,Wanqin Jin
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination . Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS , SEM, water contact angle test , AFM , IR and XPS . These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
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
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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
DESALINATION
·
2019
·
IF 6.035
Zhikan Yao,Lu Elfa Peng,Hao Guo,Weihua Qing,Ying Mei,Chuyang Y. Tang
A nanofiltration-like (NF-like) forward osmosis (FO) membrane was prepared by interfacial polymerization and applied for seawater pretreatment . The prepared NF-like FO membrane shows much higher water permeability and higher divalent salt to monovalent salt selectivity compared to a commercial reverse-osmotic-like (RO-like) FO membrane. The comparison between NF-like FO membrane and RO-like FO membrane in FO process was systematically investigated by using an antiscalent (sodium polyacrylate , PAANa) solution as draw solution. Both NF-like and RO-like FO process showed high rejection of alginate and sulfate. However, the water flux and monovalent salt (NaCl) passage in NF-like FO process were much higher, which enables the NF-like FO membrane to be a better candidate for pretreating seawater. The findings provide new insights on the design and preparation of FO membranes for seawater pretreatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Innovative Food Science & Emerging Technologies
·
2021
·
IF 5.916
Shuzhen Zhao,Sihang Li,Jianfei Pei,Huanna Meng,Haihua Wang,Zhenyu Li
This study investigates the potential of hybrid membrane processes including microfiltration (MF), ultrafiltration (UF) and forward osmosis (FO) for non-thermal concentration of apple juice. The process performance and characteristics (physicochemical properties, nutritional and aroma components and microbiological quality) of apple juice were studied. The clarity of apple juice was significantly promoted as pore size of membrane reduced. MF and UF can also ensure microbiological safety in pre-treated apple juice. According to its efficiency of filtration as well as performance of simultaneous clarification and cold-sterilization, 0.22 μm MF membrane was identified as the optimal membrane for the pre-treatment. The pre-treated apple juice can be concentrated up to 65°Brix by subsequent single stage FO. FO retained nutritional and volatile compounds of apple juice while significant reductions were found in the juice concentrated by vacuum evaporation . Hybrid MF-FO can be a promising non-thermal technology to produce apple juice concentrate with high quality.
研究领域:
食品科学
·
生物工程
✓ 已验证
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2022
·Vol. 16
·期 9
·1-12
·
IF 6.048
Ma Tao,Hui Haiqing,You Xiaofei,Pei Zhiqiang,Tian Miao,Wu Bing
Nanofibre-supported forward osmosis (FO) membranes have gained popularity owing to their low structural parameters and high water flux. However, the nanofibrous membranes are less stable in long-term use, and their fouling behaviours with foulants in both feed solution (FS) and draw solution (DS) is less studied. This study developed a nanofibrous thin-film composite (TFC) FO membrane by designing a tiered dual-layer nanofibrous substrate to enhance membrane stability during long-term usage and cleaning. Various characterisation methods were used to study the effect of the electrospun nanofibre interlayer and drying time, which is the interval after removing the M-phenylenediamine (MPD) solution and before reacting with trimesoyl chloride (TMC) solution, on the intrinsic separation FO performance. The separation performance of the dual-layer nanofibrous FO membranes was examined using model foulants (sodium alginate and bovine serum albumin) in both the FS and DS. The dual-layer nanofibrous substrate was superior to the single-layer nanofibrous substrate and showed a flux of 30.2 L/m 2 /h (LMH) when using 1.5 mol/L NaCl against deionised (DI) water in the active layer facing draw solution (AL-DS) mode. In the fouling test, the water flux was effectively improved without sacrificing the water/solute selectivity under the condition that foulants existed in both the FS and DS. In addition, the dual-layer nanofibrous TFC FO membrane was more robust during the fouling test and cleaning.
研究领域:
材料科学
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环境工程
·
水处理技术
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
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2015
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IF 1.173
Yangbo Huang,Haiyang Jin,Ping Yu,Yunbai Luo
In this study, polyamide thin-film nanocomposite (TFN) membranes were prepared on nanosilica-modified polysulfone (PSf) support layers for forward osmosis (FO) applications. Different contents of SiO2 nanoparticles (1, 3, and 5 wt%) were added to a dope solution to develop FO membranes with improved performance. The effects of SiO2 on the membranes were investigated by attenuated total reflectance-Fourier transform infrared spectrometry, scanning electron microscope, hydrophilicity measurement, and mechanical property tests. The results showed that the wettability of PSf substrates was improved with increasing concentrations of SiO2. The resulting TFN membranes had smaller structural parameters, which meant lower internal concentration polarization effects compared to typical thin-film composite membranes. However, SiO2 nanoparticle is a good modifying agent to enhance water permeability, but it could not improve the selectivity of TFN membranes. The FO performance was evaluated using deionized water as feed solution and either 1 or 2 M NaCl as draw solution in both membrane orientations. The FO water flux of the fabricated membranes increased from 9.1 to 22.3 LMH when the active layer faced the feed solution (AL-FS) and 18.2 to 41.9 LMH when the active layer was placed towards the draw solution (AL-DS), mainly due to the improvement of PSf substrate with an addition of SiO2.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Advanced Membranes
·
2022
·
IF 0
Lu Zhang,Fu Liu,Simin Yang,Shenghua Zhou,Jianqiang Wang,Haibo Lin,Qiu Han,Chuyang Y. Tang
The selective transport of water/ions through conventional forward osmosis (FO) membranes is largely impeded by solution-diffusion and internal concentration polarization (ICP). Herein, we report a novel air nanobubbles (ANBs) incorporated sandwich-structured carbon nanotube membrane (CNM) for highly permeable and stable FO desalination by taking advantage of the nanofluidic transport at the solid/liquid/vapor interface. Fluorinated multi-walled carbon nanotubes (F-MWCNTs) were assembled as the superhydrophobic interlayer between a hydrophilic cellulose acetate (CA) layer and a hydrophilic polyacrylonitrile (PAN) nanofibrous layer. The trapped ANBs in the superhydrophobic F-MWCNT layer crucially regulated the continuous water flow and effectively prevented salt diffusion. When tested with DI water as feed solution (FS) and 1 M NaCl as draw solution (DS), the ANBs incorporated sandwich-structured CNM achieved high water flux (158.0 L m −2 h −1 ) and ultralow reverse salt flux (0.4 g m −2 h −1 ) simultaneously, far beyond the state-of-the-art FO membranes. The PAN nanofibrous layer well protected the entrapped ANBs to allow a more durable FO performance. An ANBs-regulated nanofluidic flow model was proposed to elucidate selective water/salt transport mechanism. This work revealed the feasibility of ANBs incorporated membranes for osmosis-driven processes.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
MATERIALS LETTERS
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2020
·
IF 3.204
Qiao-Mei Li,Hou-Ying Ma,Yi-Ning Hu,Yan-Feng Guo,Li-Jing Zhu,Zhi-Xiang Zeng,Gang Wang
The ultrafiltration membranes fabricated by the non-solvent induced phase separation (NIPS) have been widely used as the supports of the polyamide thin film composite (PA TFC) membranes, although they are usually thick, low porosity, and poor chemical stability. Instead, thin polyethylene (PE) lithium battery microporous membrane with high surface porosity and connected pores is used as the support layer. PE membrane was pre-modified by the co-deposition of tannin and 3-aminopropyltriethoxysilane improving its hydrophilicity, and then a uniform and defect-free PA active layer was successfully fabricated by interfacial polymerization. The resultant membrane exhibited high filtration performances in the forward osmosis (FO) process (2 times higher water flux and 90% lower specific salt flux than the commercial HTI-TFC membrane), and efficient separation of NaCl and dyes in nanofiltration (NF) process, outstanding chemical stability and mechanical strength.
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
POLYMER
·
2018
·
IF 3.483
Qing-Yun Wu,Xiao-Yan Xing,Yuan Yu,Lin Gu,Zhi-Kang Xu
Novel thin film composite forward osmosis (TFC-FO) membranes were developed by using hydrophilic cellulose triacetate (CTA) porous substrates prepared by thermally induced phase separation (TIPS) method. A series of CTA substrates with different structures were fabricated to demonstrate the structure-performance relationship of the TFC-FO membranes. It is found that the substrates possess relatively large pores on their rough surfaces as well as their intrinsic hydrophilicity , leading to intensively large “ridge-and-valley” structures on the TFC-FO membranes. The large surface pores of the CTA substrates result in thick and rough polyamide skin layers. Moreover, the optimal CTA porous substrates should have a small thickness, high porosity, and oriented plate-like pores. These structures profit the TFC-FO membranes with superior water permeability, relatively high salt rejection, and low structural parameter. The one with thickness of 102 ± 16 μm and porosity of 87.1 ± 1.1% shows the smallest structural parameter (516 μm) and the desirable over-all properties in terms of water permeability and selectivity. It means that the hydrophilic CTA porous substrates enable to alleviate the internal concentration polarization (ICP) effect. These TFC membranes could provide a new route to develop high-performance composite membranes for FO desalination .
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
DESALINATION
·
2018
·
IF 6.603
Meng-Na Li,Xue-Fei Sun,Lin Wang,Si-Yu Wang,Muhammad Zaheer Afzal,Chao Song,Shu-Guang Wang
Internal concentration polarization (ICP) and membrane fouling are factors limiting the performance of forward osmosis (FO) membranes. Aiming at alleviating these problems, this study demonstrated the fabrication of FO membrane incorporated with MoS 2 by layer-by-layer assembly with the synergistic effects of surface hydrophilicity , porosity and fouling-release properties. The grafting of MoS 2 on the membrane surface was confirmed through the SEM, EDS and AFM analysis. The results demonstrated that the MoS 2 -coated-FO membrane could achieve transmembrane water flux of 27.15 LMH which was 35.34% higher than that obtained from a commercial polyethersulfone (PES) FO membrane. The reverse flux of NaCl ions was 16.42 gMH for the MoS 2 -coated-FO, 35.91% less than blank FO membrane. Meanwhile, coating MoS 2 nanosheets endowed the resultant composites with higher water flux and lower reverse solute diffusion. In addition, the results of dynamic operation in a cross-flow test cell demonstrated that MoS 2 -coated-FO membrane exhibited good antifouling and fouling-release properties. This study indicates that use of MoS 2 nanosheet is an attractive and feasible approach for the development of a dual-functional FO membrane by simultaneously improving the antifouling performance and reducing the ICP issues.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
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