APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Yirong Xiao,Dongxue Guo,Tong Li,Qingfeng Zhou,Liguo Shen,Renjie Li,Yanchao Xu,Hongjun Lin
Co-deposition between plant polyphenol tannic acid (TA) and Fe 3+ has been reported to be a facile way to construct nanofiltration (NF) membranes. However, this strategy suffers the problems of low atom economy and generating a large amount of environment-harmful aggregate wastes in solution. This work proposed a novel method based on layer-by-layer (LBL) self-assembly for preparation of TA-Fe 3+ complex based NF membrane. The proposed method was facile and environmental-friendly because it did not require any chemical or solvent involved pretreatment nor generated any aggregate waste. A series of characterizations proved the successful formation of TA-Fe 3+ complex based top layer on polyacrylonitrile (PAN) support surface. The resultant membrane showed superhydrophilicity property with water contact angle as low as 8°. Meanwhile, the optimized membrane showed a high water permeance of 40.9 L m −2 h −1 bar −1 whilst simultaneously maintained rejections higher than 93.9% towards various dyes with the molecular weight (MW) ranging from 320 to 1017 Da. Moreover, the as-prepared NF membranes showed stable long-term separation performance and good ion/organic selective separation performance. This study not only proposed a facile fabrication process for TA-Fe 3+ complex based NF membrane, but also provided great potentials for sustainable molecular separation by the prepared membranes.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Qingwu Long,Jiexin Chen,Zhu Wang,Zhe Zhang,Guangxian Qi,Zhao-Qing Liu
Oil fouling is a major obstacle for the efficient and reliable oil-water separation of mesh-based membrane processes. Innovations in membrane materials and preparation processes are therefore needed to develop anti-oil-adhesion strategies. This study reports a series of vein-supported porous membranes (VPMs) fabricated by casting polyacrylonitrile (PAN) on veins through non-solvent induced phase separation, confirmed by FTIR, SEM and XRD characterizations, and applied as an effective oil-water separation membrane. Benefiting from the combination of tubular-like vein and hydrophilic PAN, the resultant VPM demonstrates a fine-tunable morphology and superhydrophilicity, extremely boosting underwater superoleophobicty, mechanical strength and superior performance for oil/water separation to various oily mixtures/emulsions, showing underwater oil contact angles over 157° and nearly zero underwater oil adhesion. In oil-water mixture separation process, a separation efficiency of > 99% and ultrahigh permeation flux of 9592 LMH can be achieved under gravity conditions using VPM-2 (casting with 2 wt% PAN). For oil-water emulsion separation, a highest flux of 3011 LMH and trace oil concentration <10 ppm in the filtrate was generated using VPM-9 (casting with 9 wt% PAN) under a low external pressure of 3 kPa. The VPM-2 membrane is further carried out a 40-h cycling separation, showing a constantly stable water flux of ~6000 LMH. The developed VPMs open a bright path to use biomaterials for design and fabrication of novel oil-water separation membrane.
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
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 45
·2204612
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IF 19.924
Zhongxiang Bai,Kun Jia,Shuai Zhang,Guo Lin,Yumin Huang,Xiaobo Liu
The porous polymeric membranes prepared by conventional nonsolvent-induced phase separation (NIPS) suffer from notorious fouling pollution during oil/water separation. Herein, an improved one-step NIPS strategy is proposed to fabricate anti-fouling polyethersulfone (PES) based membranes that bear hierarchically spherical structures on the interface and an internalized gel network. More specifically, the hydrogen bonding between hydrophilic additives of polyvinylpyrrolidone (PVP) and tannic acid (TA), as well as Fe 3+ -TA coordination interaction are orchestrated to modulate their surface segregation behaviors during NIPS, leading to in situ generation of the interfacial assembled nanospheres and embedded gel networks in the PES matrix. Thanks to the synergistic effect of these dual antifouling barriers, the optimized membrane exhibits super-hydrophilic/underwater super-oleophobic properties, and displays high efficiency as well as good recyclability in separating surfactant stabilized oil-in-water emulsions. In addition, this improved NIPS methodology allows dip coating of various porous substrates to separate diverse oil/water mixtures, which also exhibits good anti-fouling ability. Basically, this study will provide new insights for design of anti-pollution oil/water separation materials by the phase inversion method.
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
MATERIALS RESEARCH BULLETIN
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2022
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IF 5.6
Qianyu Wei,Qiuhu Lin,Zezhen Zhang,Lili Wu,Chaocan Zhang
Polyvinylidene fluoride (PVDF)/polyhexamethylene guanidine (PHMG)/tannic acid (TA) coatings have some degree of hydrophilicity but lack stability. To improve the hydrophilicity and stability of antimicrobial PVDF/PHMG/TA membranes, Fe(III) is introduced into the composite system. As a weakly acidic hydrophilic nanoion, Fe(III) can enhance the hydrophilicity and resistance to contamination of the membranes. Furthermore, the stability can be enhanced because a three-dimensional cross-linked coating structure is formed by the complexation of Fe(III), TA and PHMG. This work investigates the effects of different tannic acid concentrations and pH conditions on the hydrophilicity, anti-pollution and stability of the modified coatings. The surface morphology of the membranes was analyzed by field-emission scanning electron microscopy. Additionally, the hydrophilicity and the antipollution performance were evaluated based on the water contact angle, submerged oil contact angle, emulsion flux and flux recovery rate. The stability was evaluated by the changes in flux recovery rate and water contact angle before and after emulsion scouring and ultrasonic treatment. The results show that the modified membranes have favorable hydrophilicity and stability after the addition of Fe(III). The water contact angle can be reduced to 19°, the pure water flux can reach 13,850 L·m −2 ·h −1 , and the emulsion flux can reach 2650 L·m −2 ·h −1 . Moreover, 99.68% flux recovery was achieved after 7 days of deionized water flushing, and the water contact angle remained almost unchanged.
研究领域:
材料科学
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环境工程
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界面化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Ziqiang Liu,Pengpeng Tu,Yating Ji,Zaisheng Cai,Hongwei Wu,Bi Xu
Fogging on transparent materials may severely obstruct vision, resulting in many problems such as energy consumption and safety hazard. Superhydrophilic coatings can effectively prevent fogging by facilitating the formation of a uniform and continuous water film. However, superhydrophilic coating usually suffers from organic solvent usage and its vulnerability in high-humidity environments due to excessive water absorption. In this work, a water-based durable anti-fogging coating has been prepared with a copolymer (P(SBMA-co-VTHS)), which is fabricated with [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) and vinyl trihydroxy silane (VTHS). As the main component, SBMA is superhydrophilic, while VTHS allows the copolymer to establish covalent bonds with the glass. Benefiting from the delicate balance between superhydrophilicity and durability, glass coated with P(SBMA-co-VTHS) could maintain excellent transparency in hot vapor (80 °C) for 8 h. Meanwhile, the light transmittance of coated glass remained above 85 % even after 40 cycles of tape peelings. In addition, the P(SBMA-co-VTHS) coating showed superior self-cleaning performance due to its superhydrophilicity, which is meaningful for practical applications.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Yujia Tong,Changing Miao,Wenlong Ding,Fiona Hammond Quarcoo,Xiao Xiao,Hongjun Ji,Weixing Li,Xiaohui Ju
The current methods of constructing modification strategies for hydrophilic membranes are time-consuming, complex in operation, and poor in universality, which limit their application on membranes. In this work, inspired by the adhesion properties and versatility of caffeic acid (CA) and p-phenylenediamine (PPDA), a simple, rapid, and universal method was designed for the separation of oil-in-water emulsion by preparing a stable hydrophilic coating separation membrane. The preparation time of the membrane was shortened to 40 min. The developed PVDF–PCA/PPDA membrane showed superhydrophilic and underwater superoleophobic properties. When applied to petroleum ether-in-water emulsion, isooctane-in-water emulsion, and dodecane-in-water emulsion separation, the oil rejection was more than 99.0%. In the circulating separation of 10 g/L soybean oil-in-water emulsion, the oil rejection was more than 99.3%, and the highest flux was 1036 L·m–2·h–1. The prepared PVDF–PCA/PPDA membrane performed well in the separation test of oily wastewater. The proposed strategy is simple and rapid; it may become a universal method for preparing membranes with super strong antifouling properties against viscous oil and accelerate the research progress of membrane separation of oil-in-water emulsions.
研究领域:
材料科学
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环境工程
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界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Juan Wang,Zongxue Yu,Xuehan Xiao,Zhiquan Chen,Guangyong Zeng,Yucheng Liu,Jiajia Hou
In this paper, a method of growing SiO 2 on hydroxyapatite in situ and depositing it into polydopamine-modified MCEM membrane was reported to prepare super-hydrophilic underwater super-oleophobic coatings. The results showed that the hydrophilic properties of SiO 2 , the hydroxy-rich structure of hydroxyapatite and the synergistic action of polydopamine made the membrane have excellent hydrophilicity. The modified HAP@SiO 2 /PDA coating membrane not only had excellent mechanical properties, but also had good oil and water selectivity. At the same time, the membrane separation flux of light oil can reach 3000 L/(m 2 ·h), and the oil discharge rate of heavy oil can reach 98.95%. More importantly, the membrane can remove 90.90% of the actual oilfield wastewater. As a result, HAP@SiO 2 /PDA coatings can effectively treat a wide range of oily wastewater and demonstrate attractive separation capabilities.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tinghan Yang,Pan Wu,Changjun Liu,Zunzhao Li,Wei Wang,Yang Xu,Haibo Wang,Wei Jiang
The reduction of oil fouling in pipes and tanks is essential for the oil storage and transportation industry. In this study, a superhydrophilic/underwater superoleophobic surface (SUSS) with high wearability, weatherability, and durability was developed using a facile two-step synthesis method and used to expel fouled oil from the surface using water without a surfactant. Some typical oils, including kerosene and white oil, can be spontaneously expelled by static water; however, rapeseed oil requires motive water for expulsion because of its high affinity for the SUSS. Different occurrences can be estimated based on a correlated parameter, φ(Pe), which is calculated using an introduced dimensionless number, Pe=σLVuμ. A positive value of φ indicates the occurrence of fouled-oil expulsion by water replacement, whereas a negative value indicates no occurrence of this phenomenon. This study provides a facile strategy for the rapid cleansing of oil-fouled pipes and tanks without using a detergent, thereby lowering costs and environmental risks.
研究领域:
材料科学
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表面工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yuanhui Gao,Guogang Xu,Peng Zhao,Lulu Liu,Enliang Zhang,Shaowei Jin
Insufficient permeability and membrane fouling significantly influence the efficiency of ceramic microfiltration (MF) membranes in oil/water emulsion treatment. In this study, a high-flux whisker layer ceramic MF membrane with super-hydrophilicity was successfully fabricated through gel-spin coating method and a low-temperature oxidation method, which was used to separate oil/water emulsion. The effects of the whisker layer and surface wettability were systematically investigated, and the mechanism of in-situ gelling and pore size distribution was proposed. The super-hydrophilic ceramic MF membrane with an average pore size of 250 nm exhibited a high gas flux of 934 m 3 /(m 2 ·h·bar) and excellent pure water flux of 9754 L/(m 2 h bar). Even after a long-term circulating filtration process, the super-hydrophilic ceramic MF membrane still maintained a high water flux of over 50 L/(m 2 ·h) at a transmembrane pressure of 5 KPa during the treatment of oil-in-water emulsion with a concentration of 1000 mg/L. Overall, the developed ceramic MF membrane demonstrated high permeability and excellent anti-fouling performance, making it a promising candidate for oil/water emulsion wastewater treatment.
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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2023
·
IF 9.9
Nan Zhang,Shanshan Huang,Lu Chen,Yue Li,Min Tang,Qunyue Pei,Jian Liu
It is important to develop electrocatalysts that are cheap and have high activity for hydrogen evolution reaction (HER). In this work, Ni 3 S 2 /NiMoS with amorphous phase and unique candied-haws shaped nanoarray structure was successfully grown on nickel foam (Ni 3 S 2 /NiMoS/NF) as efficient HER catalyst. Combining Ni 3 S 2 with NiMoS resulted in the extension of the heterointerfaces between the materials, which facilitated the HER process in alkaline medium. The amorphous Ni 3 S 2 /NiMoS with disordered atom arrangement provided abundant active sites. Also, the unique morphology of the catalytic electrode simultaneously enabled it exhibit superhydrophilicity and underwater superaerophobicity. It is beneficial for the sufficient diffusion of the electrolyte onto the catalyst surface and the fast departure of hydrogen bubbles from the surface. As a result, the activity of Ni 3 S 2 /NiMoS/NF was higher than that of Pt/C even at high current densities. It is very valuable for industrial applications that require high current density. The superior stability of Ni 3 S 2 /NiMoS/NF compared to Pt/C further demonstrated that this catalytic electrode has potential for industrial applications.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jie Hu,Shenglin Yuan,Wensha Zhao,Caiwang Li,Peng Liu,Xiang Shen
The direct discharge of oily wastewater into the environment is considered one of the greatest threats to the ecological environment. Membrane technology is considered as an efficient strategy to treat oily wastewater. However, the membrane fouling caused by oil adsorption has intensively impeded its practical utilization in oil/water separation. This work aims to fabricate an anti-oil-fouling membrane for the effective separation of oil/water emulsions. The PEGylated poly(vinylidene fluoride) (PVDF) membrane was synthesized via thiol–ene photochemistry with poly(ethylene glycol) diacrylate (PEGDA) and 3,6-dioxa-1,8-octanedithiol (DOT) as the modifiers. The results of scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) mapping analysis revealed that the PEGylated layers show uniform distribution on the membrane surface by regulating the feed PEGDA concentration. The superhydrophilic and underwater superoleophobic characteristics of the PEGylated membrane provided oil-adhesion resistance to the membranes. The membrane grafted with a high amount of PEGylated layers shows a low pure water flux, due to the pore blockage. The PEGylated membrane possesses the stable surface wettability and permeation performance of emulsion. The separation efficiency of PEGylated membranes for multiple emulsions is greater than 99%, and the highest rejection value is as high as 99.9%. After the three-cycle filtration of emulsified pump oil solution, the flux recovery ratio of membranes still reaches 90%, indicating an outstanding fouling resistance to emulsified oily matters. This work provides a feasible strategy to prepare the antifouling PVDF membrane used for the oil/water separation.
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 MEMBRANE SCIENCE
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2023
·
IF 9.5
Shiwei Tian,Yaqi Zhang,Qiankun Sha,Tian Yang,Yan Huang,Xingxiang Zhang,Wei Wang,Na Han
Highly efficient treatment of oil-water emulsions in severe environments (organic solvents, strong acids) is recognized as a challenging subject. Polyphenylene sulfide (PPS) is an ideal membrane material with superior thermal stability as well as chemical resistance that is expected to settle this challenge. However, the hydrophobicity of PPS (h-PPS) membrane inherently prevents its efficient treatment of oil-in-water (O/W) emulsions. In this study, superhydrophilic modification of PPS substrates was achieved by in situ electrostatic self-assembly of hydrophilic Zr-MOFs to obtain UiO-66-NH 2 @h-PPS membranes. The introduction of UiO-66-NH 2 crystals constructed the micro/nanoscale hierarchical structure for the substrate, which transforms the PPS substrate from a hydrophobic to a superhydrophilic state (water droplets require only 0.6 s to be completely immersed in the membrane). Meanwhile, the UiO-66-NH 2 @h-PPS membranes gain under-water superhydrophobicity (the under-water oil contact angle exceeds 150° for toluene, hexane , dichloromethane , and carbon tetrachloride , of which toluene reaches 163.1°), thereby improving wettability selectivity and decreasing oil adhesion, permitting the fabricated UiO-66-NH 2 @h-PPS membranes to effectively separate different types of O/W emulsions. The UiO-66-NH 2 @h-PPS membranes acquire excellent permeate fluxes (for the surfactant-free toluene-in-water emulsion, it reaches up to 7638.1 L m −2 h −1 ) and separation accuracy (99.1% oil rejection). Moreover, the UiO-66-NH 2 @h-PPS membrane exhibited outstanding harsh environment resistance. Interestingly, the combination of UiO-66-NH 2 and h-PPS substrate was applicable to degrade the organic compound in water, and the degradation efficiency of the methylene blue achieved 85.7% under visible light within 120 min. In summary, loading Zr-MOFs onto h-PPS substrates provides a novel strategy for the efficient treatment of wastewater under complex conditions with great potential for practical applications.
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
危险品化学品经营许可证（带存储）