JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Ting Chen,Peng Xu,Minghui Qiu,Xianfu Chen,Zhaoxiang Zhong,Yiqun Fan
The challenge of membrane fouling persistently hinders the advancement of membrane technology . The construction of patterned membrane surfaces is anticipated to mitigate the effects of membrane fouling significantly. In this study, ceramic microfiltration membranes with corrugated patterns were fabricated by 3D printing combined with the dip-coating process. To assess the impact of surface patterning on ceramic membrane performance , we initially compared the pore size and pure water flux between straight and corrugated membrane tubes. Both configurations exhibited similar parameters: a support pore size of approximately 1 μm, a membrane layer pore size of about 110 nm, and a pure water permeance of around 950 L m −2 h −1 ·bar −1 . The corrugated ceramic membranes demonstrated superior anti-fouling properties compared to their straight counterparts during the filtration of nanoparticle suspensions, oil-in-water emulsions, and bacterial suspensions . Specifically, under a nanoparticle suspension concentration of 2000 ppm, a transmembrane pressure of 0.2 MPa, and a flow rate of 1.0 m s −1 , the corrugated membrane achieved a stable flux of approximately 1.7 times greater than that of the straight membrane. Furthermore, we explored the effects of surface patterning on fluid dynamics through numerical simulations. The enhanced turbulence dissipation rate in the patterned membrane tubes suggests increased surface turbulence and an improved capacity to remove contaminants. This research offers novel insights into the development of ceramic membranes with enhanced anti-fouling capabilities for water treatment.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
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IF 3.973
Kang Feng,Chunhua Ni,Liangmin Yu,Wenjun Zhou,Xia Li
A novel indole derivative (N-(1 H -2-phenyl-indole-3-ylmethyl) acrylamide, NPI) synthesized by a Friedel-Crafts alkylation reaction was identified using IR spectroscopy, 1 H NMR, 13 C NMR and elemental analysis. The inhibitory effect of this novel indole derivative on bacteria and marine algae was studied. The results showed that the inhibition ratios of the indole derivative against Escherichia coli and Staphylococcus aureus were 95.93% and 94.91%, respectively, and the indole derivative possessed prominent inhibitory activity against Phaeodactylum tricornutum , Nitzschia Closterium and Skeletonema costatum . These findings indicate that the indole derivative has high biological activity. Subsequently, the indole derivative was introduced to acrylate resins by free-radical polymerization. The resulting acrylate resins were subjected to self-polishing, anti-algal and antifouling test, the results of which indicated that acrylate resins containing the synthesized indole derivative could exhibit significant antifouling properties because of the combination of the biofouling resistance of the indole derivative and the self-polishing properties of acrylate. This work provides an academic foundation for studying environmentally friendly and highly efficient antifouling coatings.
研究领域:
海洋生物学
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材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Wei Zhang,Yubing Lu,Jun Liu,Xipeng Li,Baoan Li,Shichang Wang
Superhydrophobic and oleophobic membrane applied in membrane distillation was fabricated by constructing a re-entrant composite structure via immobilizing silica nanoparticles (NPs) on the polyvinylidene fluoride (PVDF) membrane. The silica coated membrane with the assistance of polydopamine (PDA) was then fluorosilanized by means of a silane coupling agent 1H,1H,2H,2H-perfluorooctyltrichlorosilane. A series of characterizations were implemented to investigate the effects of modification process on the structure and performance of the PVDF composite membranes . The fouling and wetting behaviors of original and modified membranes were explored by direct contact membrane distillation (DCMD) tests using a mixed solution of inorganic salts, organic matter and surfactant as the feed. The results indicated that silica NPs and fluorinated silane were presented on the PVDF membrane substrate. After surface modification, the liquid entry pressure (LEP) increased by 120%, in addition, the water contact angle (WCA) increased from 127.0° to 169.0°, and the oil contact angle (OCA) increased from 2.8° to 112.1°. The modification process showed no effect on the pore size and pore structure . Furthermore, the composite membrane exhibited excellent chemical stability and prominent mechanical stability. The re-entrant structure resulting from nanoparticles and microspheres and the omniphobic feature were conferred on the composite membrane. The DCMD tests showed that the composite membrane kept a stable permeate flux in the long-term concentration experiment, with the salt rejection rate approximately 100%. What's more, the composite membrane did not suffer from fouling and wetting, and still dry and clean after the test. In comparison, the pristine membrane was seriously polluted during the test, and the permeate flux decreased to 28.3% of the initial value. Overall, the novel modified PVDF composite membrane reported in this work presents outstanding anti-fouling performances.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2017
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IF 6.035
Zhi Geng,Xue Yang,Chanhee Boo,Suiyi Zhu,Ying Lu,Wei Fan,Mingxin Huo,Menachem Elimelech,Xia Yang
We report the fabrication and characterization of a novel organic/inorganic hybrid ultrafiltration membrane with anti-fouling and self-cleaning properties. Nanoscale TiO 2 clusters were grafted on the side chains of a poly(aryl ether sulfone) matrix containing trifluoromethyl and carboxyl groups (PES-F-COOH) using a silane coupling agent. Separation efficiency, fouling behavior, and self-cleaning property of the TiO 2 /PES-F-COOH hybrid ultrafiltration membrane were investigated by dead-end filtration experiments using a polyacrylamide foulant solution. Analysis of the membrane chemistry showed that grafting TiO 2 on the side chain of the PES-F-COOH resulted in homogeneous dispersion of TiO 2 clusters in the polymer matrix . The hybrid UF membrane exhibited significant self-cleaning efficiency. Specifically, water flux following polyacrylamide fouling was 53% recovered after membrane exposure to UV irradiation, which is attributable to photocatalytic degradation of the organic foulants by TiO 2 . We further demonstrated the anti-photocatalytic ageing property of the hybrid UF membrane, indicating resistance to decomposition of the membrane polymer matrix by photocatalytic oxidation . Our developed method can serve as a versatile platform for the development of anti-fouling and self-cleaning hybrid membranes or functional materials for a wide range of applications.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Jing Cai,Xue-Li Cao,Yi Zhao,Fu-Yi Zhou,Zhaoliang Cui,Yong Wang,Shi-Peng Sun
In this work, annular supramolecular cucurbit[6]uril (CB6) and dendritic polyamidoamine (PAMAM) were employed to construct high-performance nanofiltration (NF) membranes via one-step interfacial polymerization (IP) process. The obtained membrane features not only the enlarged polyamide tunnels based on the large steric hindrance of CB6 and PAMAM but also the novel hydrophobic rotaxane tunnels based on the host-guest chemistry between CB6 and piperazine (PIP) or PAMAM. The CB6/PAMAM-modified membrane achieved nearly four times enhancement of pure water permeability (PWP) compared to the unmodified traditional membranes with still high Na 2 SO 4 rejection. This indicates the positive contribution of CB6/PAMAM-modification to overcome the “trade-off” effect limiting NF development. In addition, the modified membrane shows the industry-leading separation performance for monovalent and bivalent anions due to the cooperation between the modified pore-size and surface charge. More valuably, CB6/PAMAM-modified membrane manifests the strong anti-fouling property not only in inorganic salt system but also in organic pollutant system based on the modified surface characteristics, indicating its broader application fields. This provides a feasible method to prepare a high-performance anti-fouling NF membrane.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Xinting Bai,Ying Zhang,Chong Wang,Zhi Wang,Jixiao Wang
Anti-biofouling nanofiltration (NF) membranes can reduce the damage of bacteria to membranes and are typically fabricated by grafting bactericidal chemicals on membrane surface, with potential environmental safety issues as well as health hazards. Vanillin (VA) is a natural non-toxic bacterial inhibitor that has been proven to inhibit a wide range of bacteria. In this study, VA was introduced as an aqueous phase additive to the selective layer by interfacial polymerization reaction thus preparing NF membranes with excellent anti-biofouling properties. The biofilm area on the optimized membrane surface formed by Bacillus subtilis and Escherichia coli were reduced by 66.0 % and 75.1 %, respectively. In addition, the hydrophilicity enhancement and the membrane surface roughness reduction were attributed to the VA introduction, which resulted in an improvement of the anti-adhesion properties of modified membranes, and flux recovery ratio of optimal membranes was 75.7 % while flux decline ratio was 50.4 %. The water permeability for mixed salt solution of membrane with the optimized VA concentration was 1.22 times higher than control membrane and rejection of NaSO 4 was 99.0 %, meanwhile the separation factor of NaCl/Na 2 SO 4 stabilized in the range of 27.4–28.0. This facile process provided an non-biotoxic method to prepare environmentally friendly and effective anti-biofouling membranes.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2018
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IF 4.427
Yang Wang,Baoyu Gao,Shuya Li,Bo Jin,Qinyan Yue,Zhining Wang
Cerium oxide (CeO 2 ) nanoparticles (NPs) have indicated great potentials as nanofiller owing to its high surface area, antioxidant properties and low cost. In this paper, thin film nanocomposite (TFN) RO membranes were proposed to be prepared through incorporation of hydrophilic CeO 2 NPs in polyamide (PA) selective layers via interfacial polymerization (IP). EDX, XPS , SEM , AFM, contact angle and zeta potential were used to examine the property and morphology of the prepared membranes. CeO 2 NPs were successfully embedded in the PA network, which endowed the TFN membranes with rougher surfaces and thinner PA layers. The TFN membranes were fabricated with different CeO 2 NPs contents (0, 50, 100, 150, 200, 400 mg/L). With increasing CeO 2 NPs loading amount, the hydrophilicity improved from 85.4° to 65.7° and the surface charge declined from −19.4 to −34.2 mV. These characteristics contributed to a 50% enhancement in water flux of TFN-CeO 2 100 membrane (containing 100 mg/L of CeO 2 NPs) without compromise the NaCl rejection (98%). Moreover, CeO 2 embedded membrane exhibited an enhanced fouling resistance property through preventing the adhesion of hydrophobic foultants. This study demonstrated the desirable applicability of CeO 2 NPs in synthesizing novel TFN membranes for desalination application.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Y. Li,Y.J. Zhao,M. Wang,H.Y. Wang
Nanofiltration (NF) is a promising method in lithium extraction from salt lake brine with a high Mg 2+ /Li + mass ratio. However, membrane fouling challenges its applicability and productivity. This study incorporated graphene oxide (GO) into the polyamide (PA) selective layer of NF membranes to enhance anti-fouling properties and improve lithium extraction from brine. Membrane structure analyses revealed that 0.002 wt% and 0.01 wt% GO facilitated the interfacial polymerization reaction. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) results indicated that the PA selective layers in the GO-0.002 % and GO-0.01 % membranes were denser, smoother, and thinner. In contrast, the addition of 0.05 wt% GO resulted in the Turing structures on the membrane surface. Adsorption kinetics indicated pollutant adhesion in the following order: GO-0.05 % > GO-0 % > GO-0.002 % > GO-0.01 %, which was attributed to calcium-carboxyl complexation, as directly measured by AFM and consistent with carboxyl density. The GO-0.002 % and GO-0.01 % NF membranes demonstrated excellent anti-fouling properties in brines, with lower initial fouling rates and higher flux recovery after cleaning, underscoring the significant role of calcium-carboxyl complexation in membrane fouling. The retention of Mg 2+ increased to 95 %, while that of Li + decreased to below −28 % for GO-0.002 % and GO-0.01 % membranes, indicating promising potential for Mg and Li separation. This study provides valuable insights into developing NF membranes with high Mg/Li selectivity and anti-fouling capabilities for lithium extraction from salt lake brine.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Chen Zhao,ShanShan Wang,Nianping Wang
Dip coating technology is often used for hydrophilic modification of PVDF membrane surfaces due to its significant modification effect, simple process and low cost. Nevertheless, the relatively feeble binding forces between coating molecules and between the coating and the substrate membrane often raise concerns about the stability of modified membranes. This study utilized PAA and Sac-100 to develop a hydrophilic and negatively charged coating to improve the anti-fouling characteristics of PVDF membranes in the process of oil/water separation. Two modification reagents underwent ring opening crosslinking reaction and ultimately deposited on the surface of PVDF membranes in the form of a network polymer, thereby solving the stability problem of the modification coating. After the modification, the surface microstructure of the membranes remained unchanged, while the average pore size fell from 0.37 μm to 0.32 μm. The water contact angle of the modified membrane decreased to 39° suggesting an excellent hydrophilic property. The modified PVDF membrane exhibited exceptional resistance to fouling in the oil/water separation experiment, demonstrating a consistent permeance value of 212 L m −2 h −1 bar −1 that was four times higher than that of the original membrane. Following the cleaning process, the permeance of the modified membrane could be restored to a level of 74.5 %.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Dongxue Guo,Yirong Xiao,Tong Li,Qingfeng Zhou,Liguo Shen,Renjie Li,Yanchao Xu,Hongjun Lin
Inspired by the mussel adhesion mechanism, plant polyphenol tannic acid (TA) with abundant catechol groups and hydrophilic Jeffamine (JA) containing amino groups were used in a layer-by-layer (LBL) process to fabricate composite nanofiltration (NF) membranes in this study. Alternately immersing a polyacrylonitrile substrate into individual TA and JA buffer solutions could readily construct a NF membrane selective layer without any pre-treatment to the substrate. The optimised membrane showed a high pure water permeance of 37 L m −2 h −1 bar −1 whilst maintaining rejections higher than 90% towards various dyes with molecular weights ranging from 269 to 1017 g mol −1 . Particularly, the obtained membrane exhibited excellent anti-fouling and long-term performance attributed to the hydrophilic membrane surface and covalent bonds in the selective layer. The novel strategy inherited the advantages of a mussel-inspired dopamine material but overcame its disadvantages. The results disclosed in this study not only provide a novel strategy to prepare composite NF membranes, but also facilitate the mussel-inspired LBL design of advanced materials for environmental applications.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Silei Liu,Rongrong Chen,Qi Liu,Jingyuan Liu,Jiahui Zhu,Gaohui Sun,Hongsen Zhang,Jun Wang
Silicone coatings cannot completely prevent the adhesion of marine organisms on hull surfaces under static conditions. In this study, a Schiff base modified polyurethane antifouling coating (PUx-SBSi) was prepared by a facile method. The silicone modified by Schiff base not only retained the low surface energy characteristic, but also effectively addressed the inherent issue of insufficient static antifouling performance in single silicone-based materials. The PUx-SBSi coatings inhibited the adhesion of marine bacteria ( Pseudomonas xiamenensis ( P. xiamenensis )) up to 95.3 %. Furthermore, the PUx-SBSi coatings exhibited exceptional mechanical property and a significantly higher adhesion strength, with a maximum of 7.3 MPa, which overcome the limitations of inadequate mechanical property and weak adhesion strength of single silicone-based coatings. Therefore, PUx-SBSi coatings with both mechanical properties and static antifouling performance are anticipated to effectively protect ship surfaces from marine organisms, playing a crucial role in the sustainable development of functional coating materials.
研究领域:
材料科学
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海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Jialong Zhu,Hong Fan,Jintao Wan
Transparent, hard, and flexible multifunctional coatings have a wide range of applications; however, most of them need organic solvents. Here, we present a solvent-free and UV-cured coating made from fluorinated epoxy MTQ silicone resin combined with branched triepoxy siloxane as the reactive diluent. After UV-initiated ring-opening polymerization in the presence of a triarylsulfonium hexafluoroantimonate catalyst, the resultant cured coating exhibits high transparency (∼92%, 550 nm), pencil hardness (7H), and flexibility (1 mm bending diameter) due to the formed organic–inorganic nanostructures in a highly cross-linked network. The triepoxy siloxane significantly reduces the viscosity before curing and increases cross-link density of the coating. The coating without any volatile content shows a smooth surface with low roughness (Rq = 0.46 nm) and delivers an anti-smudge ability owing to perfluorinated chains inherited from the MTQ resin. Furthermore, even after 3000 abrasion cycles, the coating still has a water contact angle greater than 90°, displaying excellent wear resistance. Our work provides a promising way to access high-performance multifunctional coatings in a more sustainable manner.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）