INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Jiong Li,Guoyong Du,Chunping Deng,Huatao Zhang,Lijuan Dai
In recent years, modified membranes for oil–water separation have garnered significant attention. However, the complexity of the process, low efficiency, and serious oil contamination have been the main obstacles to its application. Hence, there is an urgent need to explore simple, environmentally friendly modification methods. Inspired by adhesive bioproteins and diatomaceous silica, this study presents a simple, low-cost, and environmentally friendly biomimetic coating strategy to prepare a highly efficient oil–water separation membrane with convenient separation and excellent resistance to oil fouling. Using pyrogallic acid (PG) and silane coupling agent KH550, a one-step modification of the poly(vinylidene fluoride) (PVDF) microfiltration membrane (MF) was conducted, transitioning the surface wettability of the PVDF membrane from highly hydrophobic to superhydrophilic. This resulted in layered nanoscale papillary structures on the PVDF–MF surface, imparting superhydrophilicity and underwater superoleophobicity, along with excellent oil–water separation capability. Under a transmembrane pressure of 0.85 bar, systematic testing of the modified membrane demonstrated that the stable flux of the emulsion is approximately 950 L m–2 h–1, with an oil rejection rate exceeding 99% and significantly improved fouling resistance, as well as excellent chemical stability and salt resistance. The “green” in situ biomimetic silicification strategy is equally applicable to inert materials such as polytetrafluoroethylene (PTFE) membranes, demonstrating its significant potential for application on other materials.
研究领域:
材料科学
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环境工程
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表面化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Renjie Li,Jinyan Li,Linhua Rao,Hongjun Lin,Liguo Shen,Yanchao Xu,Jianrong Chen,Bao-Qiang Liao
Mussel-inspired polydopamine (PDA) modification of membrane is an effective alternative for improving permeation flux and anti-fouling performance. Meanwhile, efficient method for oil-water emulsions separation is still highly desired. However, problems, such as time-consuming process and low utilization ratio of expensive raw material, have always been stumbling block to application of this strategy. In this study, inkjet printing of dopamine (DA) followed by UV light irradiation to modify mussel-inspired polyvinylidene fluoride (PVDF) membrane was proposed. Accordingly, PVDF membrane was inkjet printed by alternately using DA inks and alkaline tris (hydroxymethyl) aminomethane (Tris) ink. The resultant membrane was then subjected to photopolymerization under UV irradiation to form a PDA layer. Successful formation of PDA layer on membrane surface was verified by series of physical and chemical methods . The optimized membrane (DA 80-60 /PVDF) exhibited superior oil/water separation performance with 1.5 times permeate flux higher than that of the pristine PVDF membrane and above 99% oil rejection rate. Meanwhile, the modified membranes showed satisfactory stability in aqueous solution with wide pH range (pH 2.0–7.0). The novel membrane modification method proposed in this study is facile, cost-saving and environment-friendly, serving as a competitive candidate for fabrication of efficient membranes for oil-water emulsion separation.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Gui-E Chen,Sheng-Nan Zhao,Yi-Ni Shi,Zhen-Liang Xu,Jing Ye
In the realm of wastewater treatment, the removal of grease and the control of microbial reproduction are crucial links. However, the design of a sustainable membrane with high oil filtration efficiency, high water permeability, excellent separation capacity and strong antibacterial function is still a problem that continues to challenge the researchers. In this work, Tannic acid (TA) and polyethylenediamine (PEI) were used as hydrophilic modifiers to combine with dendritic mesoporous silica (DMSN) to prepare a new type of nanocomposite particles (TA-PEI@DMSN). Using glutaraldehyde (GA) as a coupling agent, TA-PEI@DMSN nanoparticles were coated on the surface of polyvinylidene fluoride (PVDF) membrane, and a modified membrane (TA-PEI@DMSN/PVDF) was developed, which was both super-hydrophilic and super-oleophobic underwater conditions. The TA-PEI@DMSN/PVDF membrane can effectively intercept oily substances such as cyclohexane, n-heptane, petroleum ether and n-hexane, achieving an oil rejection rate up to 99.1% for heptane. The modified membrane exhibits superhydrophilicity (CA≈0°) and underwater oil resistance, excellent anti-fouling performance and robust stability. Otherwise, we noticed that the positive charge characteristic of the TA-PEI surface imparts the TA-PEI@DMSN/PVDF membrane with more 99.97% antibacterial activities against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The molecular simulation results show that the wettability and hydrophilicity are significantly improved compared with the unmodified PVDF membrane, which is consistent with the experiment data. The modified membrane performs well and shows great potential for oil-water separation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yujia Tong,Chenxuan Shao,Jinbo Chen,Fiona Hammond Quarcoo,Changqing Miao,Xiaohui Ju,Weixing Li
High hydrophobicity of polyvinylidene fluoride (PVDF) membrane surface results in adsorption of oil droplets and membrane fouling . A hydrogel coating with crosslinking network of polyvinyl alcohol (PVA), pyrogallol (PG) and Fe(III) based on PVDF membrane was proposed. Hydrogen bonds between PVA and PG in water were regulated by ethanol to form a uniform hydrophilic hydrogel coating on PVDF membrane. Chelation between PG and Fe 3+ significantly enhanced hydrogel adhesion. The surface energy of the developed PVDF-PVA/PG-Fe 3+ membrane was 39.96 mJ·m −2 , 2.71 times that of the pristine PVDF membrane, while its adhesion to oil is close to 0 μN. The permeate flux reached 1341 L·m −2 · h −1 at 0.1 bar for separating isooctane-in-water emulsions with good separation efficiency (>99 %) and cycling stability. The developed membrane could also effectively separate petroleum ether-in-water and dodecane-in-water emulsions.
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 HAZARDOUS MATERIALS
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2022
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IF 14.224
Mengnan Chai,Wangshu Tong,Zhihao Wang,Zhensheng Chen,Yuancheng An,Yihe Zhang
Piezocatalysis driven by a gentle force possesses broad application prospects for degrading organic pollutants , sterilisation, wound healing and tissue recovery. The flexible and industrially scalable poly(vinylidene fluoride) (PVDF) film is commonly used in piezocatalysis. However, under gentle force action, PVDF composite-based piezocatalysis is poor. Herein, a flexible porous film based on poly(vinylidene fluoride)-hexafluoro propylene (PVDF-HFP) is enhanced with Fenton fillers (α-Fe 2 O 3 nanoparticles). α-Fe 2 O 3 nanoparticles improve the piezoelectric catalysis performance of PVDF-HFP by the β-phase enhancement and provide Fe 3+ to react with H 2 O 2 generated by the piezoelectric film itself, leading to an additional Fenton reaction . Meanwhile, the Fe 3+ /Fe 2+ cycle in the Fenton process accelerates under the piezoelectric field, promoting the Fenton reaction for 6.9% degradation improvement. The study on Fe 2 O 3 /PVDF-HFP porous film with the piezo–Fenton reaction under flowing water may help promote new piezocatalysis designs with high efficiency for self–powered environmental purification.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
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2023
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IF 7
Mengmeng Liu,Jianqiang Wang,Yajie Ding,Yong Zhou,Fu Liu
Viscous oil separation and its highly efficient recovery is a great challenge in oil/water separation applications. Membrane separation was considered as a prospective strategy for oil/water separation, but membrane contamination caused by the oil droplets restricted its applications significantly. We here propose a nondispersive solvent extraction strategy to efficiently recover viscous lubricant oil from emulsions via a polydopamine modified PVDF Janus membrane . The incorporated thin polydopamine layer facilitates the adsorption and diffusion of surfactant stabilized oil droplets through the membrane. We studied the influence of polydopamine coating time, the flow rate on both feed and extraction sides, the weight content of lubricant oil on the recovery of oil. The optimized membrane exhibited a 10 h accumulative flux (1595 g·m −2 ) for viscous lubricant oil in water emulsion, which was 70 % higher than the contrast PVDF membrane. The current study might significantly advance application of this novel method for highly efficient separation and recovery of viscous oils from oil/water mixtures.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Sensors
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2025
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IF 9.1
Haowei Ma,Hongjian Zhang,Mingtao Zhu,Yong Zhang
In recent years, research on piezoelectric pressure sensing has attracted worldwide attention, as eagerly demanded by the development of wearable electronics. However, the current piezoelectric pressure sensors are unable to detect forces along different bending directions with a high resolution, thus limiting their applications in some typical scenarios. To address this issue, this study designed a novel composite structure with ZnO nanorods loaded with Ag nanoparticles (ZnONRs@Ag) and then embedded in highly oriented polyvinylidene fluoride (PVDF) fibers. Due to its unique orientation, the pressure sensor exhibits anisotropy, accurately identifying forces along distinct bending directions (such as perpendicular, parallel, or twisting). The optimized PVDF/ZnONRs@Ag device presents the peak power density of 308.1 nW cm–2 and a sensitivity as high as 0.52 V N–1 and remains stable after 7000 cycles at 1.4 Hz. The highly oriented piezoelectric devices are utilized to monitor various human movements and harvest energy from them. This research provides a viable method for manufacturing self-powered directional pressure sensors, contributing to the advancement of wearable technology and energy harvesting applications.
研究领域:
材料科学
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电子工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
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2023
·Vol. 11
·期 14
·4614-4622
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IF 6.4
Xingmin Liu,Jinling Tong,Jijie Wang,Shaowei Lu,Dongxu Yang,Hongmei Li,Chunzhong Liu,Yutong Song
Flexible piezoelectric pressure sensors have a great application prospect in wearable electronic products due to the advantages of low cost, fast response speed and a self-powered system. However, traditional films based on piezoelectric ceramic/polymer materials face problems such as poor dispersion and insufficient polarization, which hinder the piezoelectric performance of pressure sensors. In this work, MXene was introduced to modify the surface of barium titanate (BaTiO3), which was blended with poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) matrix. An electrospinning method was adapted to fabricate BaTiO3/MXene/PVDF-TrFE composite films. This work proposed a new microscopic sensing mechanism. In addition, this MXene-modification strategy could improve the dispersion of BaTiO3 into the PVDF-TrFE matrix, increase the polarization efficiency and enhance the piezoelectric performance of the sensors. The results showed that the composite film with 0.15 wt% MXene could achieve a remarkable output voltage of 7.6 V. In addition, the tensile strength of the composite film with 0.15 wt% MXene (20.8 MPa) was 77.8% higher than that without MXene (11.7 MPa). Meanwhile, the β phase content of the composite film could reach 81.04%, and the crystallinity increased from 39.49% to 50.31%. The fabricated piezoelectric pressure sensor had a wide detection range (0.2–400 kPa) and a short response time (56 ms). Besides, even after undergoing over 5000 compression cycles, it maintained a stable piezoelectric response. This pressure sensor could quickly respond to joint movements and strenuous exercises in humans. Therefore, this pressure sensor showed great advantages and potential in the application of human motion monitoring.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2023
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IF 3.9
Hongyu Liu,Jiafeng Zhao,Xin Wen,Jun Zhang,Huan Zhang,Huicai Wang,Junfu Wei
In this work, CoFe 2 O 4 (CFO)−PVDF catalytic membrane was fabricated by coupling CFO into PVDF membrane. It can activate peroxomonosulfate (PMS) to oxidize contaminants. Therefore, the catalytic membrane can realize filtration and catalytic oxidation of dyes simultaneously. The single rejection rate of the CFO 2 −PVDF membrane is about 70% and catalysis alone can remove 62.37% AR18 within 110 min. In comparison with filtration and catalytic oxidation separately, the removal rate of the catalytic membrane has a visible increase which can reach 100% within 70 min. The mechanism reveals that hydroxyl radical (·OH), sulfate radical (SO 4 · − ) and 1 O 2 nonradical played about 13% parts, 27% parts and 60% parts in catalytic oxidation of dyes, respectively. The mechanism includes both radical and nonradical oxidation. The catalytic membrane has a good application for different type of dyes. The removal rate can still maintain at 86% after reused for five times since the catalyst CFO can renew from Co 3+ to Co 2+ through self recovery. Furthermore, the results confirm that the catalytic membrane has a good anti-fouling ability and low metal ions leaching risk.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2025
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IF 6.7
Ganbin Luo,Bin Hu,Yuzhe Yang,Mingjie Ma,Huiling Cheng
Recovery of cobalt from wastewater is a key method for achieving resource sustainability. A novel temperature-sensitive Co(II)-ion-imprinted composite membrane based on polyvinylidene fluoride was synthesised using N-isopropylacrylamide as the temperature-sensitive monomer and diisooctylphosphinic acid as the ligand. The preparation conditions for the imprinted composite membrane were systematically optimised, resulting in an optimal polymer with an adsorption capacity of 938.61 mg·g −1 that achieved adsorption equilibrium in approximately 30 min, outperforming most reported cobalt ion adsorbents. The surface morphologies of the Co(II)-IICM 6 membranes prepared under the optimal conditions were analysed. The results showed that the ionic ligands enabled the polymer particles to grow successfully and uniformly on the membrane surface. The imprinted composite membrane's pore size increased as a result of this expansion, with the specific area increasing from 13.01 m 2 ·g −1 to 16.84 m 2 ·g −1 . The imprinted composite membrane maintained a high adsorption capacity over ten cycles and exhibited excellent selectivity for Co(II) ions in aqueous samples containing Co(II), Ni(II), Cr(III), Cd(II), Cu(II), and Pb(II). These results indicate that the prepared temperature-sensitive imprinted composite membrane is promising for the separation of Co(II) from real water samples.
研究领域:
材料科学
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环境科学
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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
Yuchao Chen,Pengtao Gao,Xinyu Si,Zehuan Cheng,Tonghu Xiao,Xing Yang
Currently limited research reported the design of microfiltration (MF) membranes specially for handling complex food processing streams such as rough beer. This study aimed to address this knowledge gap by tailoring for the first time a new class of polyvinylidene fluoride/poly(vinyl butyral) (PVDF/PVB) blend MF membrane with highly controllable pore structure and improved anti-fouling properties, and demonstrate its potential in real rough beer filtration. Combining an unconventional nonsolvent thermally induced phase separation (NTIPS) method and a unique quinary dope solution ( i.e. , PVDF/PVB/PVP/DMAc/MgCl 2 ) with lower critical solution temperature (LCST) feature, the roles of PVB content and coagulation temperature were investigated in terms of pore structure characteristics and hydrophilicity. Although both the control PVDF membrane M0 without PVB and M6 with optimal 6.0 % PVB achieved similar turbidity removal (98–100 %), M6 exhibited enhanced permeance ranging from 27 % to 12 % with increasing simulated feed complexity from containing dextran only, yeast only to yeast/dextran mixture. The contribution of fouling of these key beer components was analyzed, indicating that the co-existence of yeast and dextran significantly aggravated fouling. Combining with membrane autopsy, in real rough beer filtration M6 showed permeance of 26.7 L·m −2 ·h −1 ·bar −1 at 1 bar that was ∼70 % higher than M0. Although with ∼50 % less irreversible fouling than M0, water cleaning implemented on M6 only recovered 62.5 % of flux. The simultaneous investigations on alkaline cleaning and operating pressure found that: a reasonably low pressure seemed favorable, e.g., 63.6 L·m −2 ·h −1 ·bar −1 at 0.2 bar, achieving up to flux recovery of ∼91 % with only ∼10 % contributed by irreversible fouling. Overall this study offers a facile yet practical strategy to tailor membranes for beer filtration, serving as an inspiration for designing future membrane processes for treating complex food processing and industry waste streams.
研究领域:
食品科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Qianqian Yu,Haijun Wang,Chunlei Yuan,Tong Wang,Chao Yan
Due to the limitation of the intrinsic dielectric constant, the energy storage density of PVDF polymers cannot meet the needs of electronic materials. In this regard, this work focuses toward enhancing the dielectric and energy storage performance of PVDF by preparing PVDF nanocomposites impregnated with sepiolite modified with cetyltrimethylammonium bromide (CTAB@Sep) and carboxylated carbon nanotubes (C-MWCNTs). The results show that CTAB@Sep nanofibers can serve as efficient nucleation agents for γ-PVDF crystals. Furthermore, Sep nanofibers modified with CTAB can significantly promote the dispersion of C-MWCNTs through the electrostatic adsorption effect and then block the conductive path, therefore improving the dielectric and energy storage properties of PVDF-based composites. The dielectric constant of PVDF/CTAB@Sep/C-MWCNTs composites increases by 8 times compared with that of pure PVDF at 1 kHz, while the loss remains at only 0.08. Under an electric field of 110 kV·mm–1, the discharge energy density is 4.03 J·cm–3, and the energy storage efficiency reaches 81.85%. Therefore, this work provides an alternative strategy for preparing high-performance polymer-based energy storage materials under low field strength.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）