COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Ahai Zhu,Jian Zheng,Zhijia Zhu,Chunyan Hu,Baojiang Liu
Oil scaling poses a significant threat to the stability of membrane separation flux during the process of oil-water emulsion separation. A single hydrophilic modified layer demonstrates the capability to effectively separate emulsions. However, it does not prevent severe water flux degradation. Although the “dual-defense” design has been proposed, the construction of a double hydrophilic anti-fouling process on the surface of the membrane is prone to clogging of the membrane, and the surface is difficult to regulate. Here, we designed a two-layer antifouling strategy using vacuum deposition method, in which the first barrier is formed by dopamine (DA) and polyethyleneimine (PEI)-coated carbon nanotubes (CNTs), and the second barrier is formed by a polyelectrolyte complex of phytic acid (PA) and polyethyleneimine (PEI) encapsulating the first barrier, which is deposited on the surface of AT-PVDF membranes. The spatial hierarchical structure provides a highly covered “double defense” barrier on the membrane surface, effectively preventing the adhesion of grease and dirt. In the separation of surfactant-stabilised oil-in-water emulsions, the emulsion separation efficiency reaches 99.8 %, and the water flux recovery rate is more than 90 % after cyclic separation. And the potential mechanism of underwater antifouling self-cleaning was analysed by density flood theory (DFT) calculations. In particular, the multilayer composite membrane was able to effectively adsorb cationic dyes in wastewater through the electrostatic effect of the first and second barriers, with a separation efficiency of more than 95 %. Therefore, the prepared superhydrophilic multilayer composite membrane has potential application prospects in the field of wastewater purification.
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 Materials Interfaces
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2018
·Vol. 5
·期 5
·1701147
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IF 4.834
Shamshad Ali,Chao Tan,Muhammad Waqas,Weiqiang Lv,Zhaohuan Wei,Songhao Wu,Bismark Boateng,Jingna Liu,Junaid Ahmed,Jie Xiong,John B. Goodenough,Weidong He
Toward high-temperature lithium-ion batteries, adding inorganic materials are proposed as an effective strategy. However, inorganic particles tend to aggregate in the polymer matrix, causing degradation in battery performance. Here, a PVDF-HFP/colloidal Al 2 O 3 composite separator is prepared with a phase inverse method. The colloidal Al 2 O 3 particles well dispersed in the PVDF-HFP polymer matrix substantially enhance the mechanical strength of the PVDF-HFP separator. The PVDF-HFP/colloidal Al 2 O 3 composite separator owns a high electrolyte uptake of 372%, a high ionic conductivity of 1.3 × 10 −3 S cm −1 at 80 °C and delivers high capacity retention of 95.6% after 100 charge–discharge cycles at 0.5 C. In addition, PVDF-HFP/colloidal Al 2 O 3 separator only has a 4.5% thermal shrinkage at 150 °C and exhibits high electrochemical performances upon annealing at 140 °C.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Journal of Cleaner Production
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2023
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IF 11.1
Bingjie Huo,Jingxue Wang,Zichen Wang,Xiaowen Zhang,Jingwei Yang,Yinglong Wang,Jianguang Qi,Wei Ma,Fanqing Meng
E-MoS 2 /PVDF piezoelectric microcapsules with superior piezocatalytic performance were synthesized by coupling of expanded MoS 2 (E-MoS 2 ) and polyvinylidene fluoride (PVDF). The bubble-driven piezocatalysis process was proposed for the first time, using as-prepared E-MoS 2 /PVDF microcapsules as piezocatalyst for the degradation of antibiotics. Results showed that the degradation efficiency of tetracycline (TC), chlortetracycline (CH), and ofloxacin (OFL) in the E-MoS 2 /PVDF microcapsules solution was 91.88%, 85.48% and 96.84% in 60 min, respectively. After 5 times of recycling, the degradation rate of TC still reaches more than 73%. Importantly, the energy consumption of this bubble-driven piezocatalysis process (76.00 kwh −3 order −1 ) was only 6.43% of ultrasonic processes. In addition, the study of the degradation mechanism found that the bubble-driven stimulated the generation of more 1 O 2 , O 2 − while increasing the content of dissolved oxygen in the water, which promoted the piezocatalytic degradation. The possible degradation paths were obtained, and the toxicity migration during the degradation of tetracycline was evaluated. The bubble-driven method provides a direction for reducing energy consumption and supplementing the oxygen consumption of degradation in wastewater pollutant treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yacong Yang,Zhihao Cao,Tianhan Shen,Junyang Zhang,Zuofei Gu,Mingwan Zhao,Zongli Xie,Yingchun Miao,Yuning Huo,Hexing Li
The photocatalytic membrane systems show great potential for water purification and wastewater treatment with efficient energy utilization. Herein, we develop a synergistic photocatalytic-photothermal route, based on Pd-TiO 2 /PEDOT composite immobilized in PVDF membrane, for effective water permeability and reutilization property. Novel Pd-TiO 2 /PEDOT/PVDF ultrafiltration membrane is prepared by the phase inversion method with immobilizing Pd-TiO 2 /PEDOT obtained by ultrasonic irradiation. During the removal of HA under light irradiation, Pd-TiO 2 /PEDOT/PVDF membrane presents an unexpected increasing in water flux, when compared to pristine PVDF, Pd-TiO 2 /PVDF and PEDOT/PVDF membranes, with the highest normalized flux reaches up to 2.1 and remains as 1.3 even after 300 min of irradiation. This significantly enhances the water transport, along with the achieved high rejection and anti-fouling performance. It can be attributed to synergistic photocatalytic-photothermal effect of Pd-TiO 2 /PEDOT, which is realized by their strong interaction and uniform distribution. The addition of PEDOT promotes photocatalytic effect of Pd-TiO 2 by enhancing separation of photo-induced charges. High photothermal conversion efficiency of Pd-TiO 2 /PEDOT and low temperature difference in Pd-TiO 2 /PEDOT/PVDF membrane facilitate effective thermal storage, beneficial for water transport. Meanwhile, thermal energy promotes generation of more ∙OH and ∙O 2 – radicals to remove pollutants. Synergistic photocatalytic-photothermal contribution in Pd-TiO 2 /PEDOT/PVDF membrane shows significant potential for practical application.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
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2018
·Vol. 59
·期 1
·103-111
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IF 1.551
Ying Gong,Wenying Zhou,Xuezhen Sui,Yujia Kou,Li Xu,Yue Duan,Fuxin Chen,Ying Li,Xiangrong Liu,Huiwu Cai,Qingguo Chen,Zhi-Min Dang
Surface modification of core-shell structured Al (Al@Al 2 O 3 ) nanoparticles was performed using γ -(Aminopropyl)-triethoxysilane (APS) and dopamine (DA), respectively, and the microstructures, dielectric properties and thermal conductivities of the Al/poly(vinylidene fluoride) (PVDF) nanocomposites were investigated. Both DA and APS enhance the interfacial bonding strength between the fillers and the matrix, leading to homogeneous dispersion of Al nanoparticles in PVDF matrix. Compared with raw Al nanoparticles, surface-treated Al/PVDF exhibit much higher dielectric permittivity due to the enhanced interfacial interactions between the two components, whereas, the dielectric loss and electric conductivity of the nanocomposites still remain at rather low levels owing to the insulating alumina shell preventing effectively core Al from direct contact. The dynamic dielectric properties results reveal that dielectric constant and loss increase with temperature due to the gradually enhanced mobility of molecular chain segments of PVDF for the raw Al/PVDF and treated Al/PVDF nanocomposites. Additionally, the PVDF nanocomposites with Al treated with APS and DA show enhanced thermal conductivities compared with raw Al/PVDF under the same filler loading because of reduced thermal interfacial resistance promoting phonon transfer across the interfaces. POLYM. ENG. SCI., 59:103–111, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
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高分子化学
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纳米技术
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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
Tiandi Pan,Jian Liu,Nanping Deng,Zongjie Li,Liang Wang,Zhaopeng Xia,Jie Fan,Yong Liu
The anti-wetting and anti-scaling abilities of membrane are two critical properties for the membrane distillation. In this work, a superhydrophobic hybrid composite nanofiber membrane with the construction of hydrophobic ZnO nanowires on PVDF nanofiber membrane (P–ZnO@PVDF) based on hydrothermal method and chemical vapor deposition (CVD) was presented. Imitating the growth of grass was employed to enhance the adhesion between ZnO nanowires and PVDF nanofiber membrane. The P–ZnO@PVDF membrane exhibited high porosity, narrow pore size distribution , superhydrophobicity, anti-wetting and anti-scaling, owing to the slip and Cassie-Baxter state caused by introduction of hydrophobic ZnO nanowires. Moreover, the membrane with robust durability presented the salt rejection of 99.9% and a stable permeation flux of 15.7 L m −2 h −1 for simulated seawater at the feed temperature of 60 °C and the distillate temperature of 20 °C after 60 h operation. The hybrid composite nanofiber membrane is to be a potential candidate for long-term operation of membrane distillation.
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
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Zeren Kang,Wei Wang,Jinhai Xu,Xiaoji Zhou,Shusu Shen,Renbi Bai
The poor thermal stability of polyvinylidene fluoride (PVDF) membranes and their tendency to swell in organic solvents limit their widespread application in the field of membrane technology. In this study, the fluorinated polyimide (FPI), P(6FDA-BAPOFP), was investigated for the first time as a modifier for the PVDF membrane to enhance its stability at high temperatures and in organic solvents. By leveraging the inherent affinity between the C-F bond in FPI and PVDF, the compatibility of the physical blending has been significantly improved. The optimal addition of 2.5 % FPI led to a 2.0-fold increase in flux while preserving rejection. The introduction of FPI into the membrane effectively delayed the thermal weight loss, demonstrating stable performance in 90 °C water. In particular, after an operational period of up to 12 days, the modified membrane exhibited > 80 % Congo Red rejection and relative stable permeance (85 L·m −2 ·h −1 ·bar −1 ). This high-flux polymer membrane contributes to energy conservation and emissions reduction in industrial production.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2019
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IF 3.074
Junqiang Zhao,Hongrui Han,Qiqi Wang,Chengyou Yan,Dongyang Li,Jing Yang,Xia Feng,Ning Yang,Yiping Zhao,Li Chen
To fabricate hydrophilic and anti-fouling PVDF ultrafiltration membrane, a kind of tailor-made symmetrical amphiphilic triblock copolymer , polyacryloylmorpholine- b -poly (methyl methacrylate)- b -polyacryloylmorpholine (PACMO- b -PMMA- b -PACMO, termed as PAMA), was prepared via RAFT polymerization and employed as an in situ surface segregation modifier. FTIR, 1 H NMR, and GPC were used to verify the well-defined chemical structure of PAMA. The hydrophilic PACMO segments of PAMA were enriched on the surface of membrane skin and interior pores as confirmed by ATR-FTIR, XPS , EDX, and water contact angle tests, endowing the blend membranes with outstanding hydrophilicity . The different cross-sectional and surface morphologies of the PVDF/PAMA blend membranes indicated that the introduction of PAMA modifiers could manipulate membrane structure due to their strong pore-forming ability. Compared with the pure PVDF membrane, PVDF/PAMA blend membranes showed higher permeability for water (28.1 times higher), excellent rejection for bovine serum albumin (up to 98.3%), and enhanced fouling resistance with a higher flux recovery ratio (up to 98.1%). Therefore, the approach of in situ surface segregation employed the RAFT mediated well-defined amphiphilic PAMA triblock copolymer modifiers for the preparation of anti-fouling PVDF membranes showed a great potential in water purification .
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
ACS Applied Polymer Materials
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2024
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IF 4.4
Yulan Tang,Dongrui Zhou,Xiankun Zhang,Xianyuan Sun,Zesheng Sheng,Ting Li
Laccase–Cu3BTC2 was synthesized from laccase and Cu3BTC2 metal–organic skeleton materials and doped with the highly hydrophilic amphiphilic polymer polyvinylidene fluoride-graft-poly(ethylene glycol) methyl ether methacrylate (PVDF-g-PEGMA) as a bimodifier in the casting solution using in situ synthesis to prepare high-flux poly(vinylidene fluoride) (PVDF) membranes. Due to the high hydrophilicity of PVDF-g-PEGMA and laccase–Cu3BTC2, the PVDF-modified membranes were more hydrophilic; the water contact angle decreased from 93.45° to 79.46°. It exhibited optimal performance when its mass fraction relative to PVDF was 8.0%. Pure water flux and the sodium alginate retention rate reached 1975.61 L/(m2·h) and 87.79%, respectively, and the flux recovery and reversible and irreversible contamination ratio were 84.64%, 71.07%, and 15.36%, respectively, substantially enhancing the pollution resistance of the PVDF membrane.
研究领域:
材料科学
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环境工程
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生物技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Du Shanmei,Xiao Yidan,Zhang Chaoyan,Fu Chongyang,Li Qizheng,Hou Limei,Li Qiang,Shi Chuan,Wang Xiaoxiong
Compared with the centralized and orderly energy supply system, the distributed energy system has attracted wide attention, although it has the characteristics of high entropy. These new energy sources can effectively solve the problem of global warming and reduce carbon emissions. However, in the high-entropy application environment, the low application frequency of a single device determines that its manufacturing energy consumption and carbon emissions cannot be ignored. Obviously, the secondary utilization of items through a reasonable design route can effectively reduce carbon emissions, and nanogenerators have an excellent advantage in this technical path. Among them, nanogenerators can effectively reduce the additional carbon emissions generated during preparation because they can use waste cloth. At the same time, the recycled battery has been proved to be able to effectively utilize its low-capacity characteristics when collecting the energy of the nanogenerator, accelerating the energy collection process of the nanogenerator so as to change faster from energy collection to energy output. More importantly, this energy system has been proved to be able to be assembled for emergency use in wilderness situations compared to other devices that require standard processing. We suggest that this system-level design inspires designing future energy systems and further reduce carbon emissions from new energy systems.
研究领域:
可再生能源
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纳米技术
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电气工程
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环境科学
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可持续能源系统
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产品关联
DOI
高影响因子
Water
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2024
·Vol. 16
·期 12
·1747
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IF 3
Wenfeng Zai,Yangman Chen,Qingdong Qin,Xiangkun Li,Dezhao Liu
HighlightsPlasma-grafting acrylic acid composite membrane for MABR was prepared.Higher O2transfer rate and better hydrophilicity for modified membranes than pristine.Modified PVDF membrane demonstrated superior nitrogen removal during startup.Activity of denitrifying bacteria was enhanced in the modified PVDF MABR.AbstractMicroporous membranes such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) often exhibit suboptimal hydrophilicity and microbial adhesion, which impede effective nitrogen removal in membrane-aerated biofilm reactors (MABRs), particularly during initial operational phases. To address this issue, the present study introduced acrylic acid (AA) following plasma treatment (P) to enhance membrane performance, thereby engineering a novel composite material optimized for MABR applications. Four MABRs—Reactor with pristine PVDF membrane (R-PVDF), Reactor with composite PVDF membrane (R-PVDF-P-AA), Reactor with pristine PTFE membrane (R-PTFE), and Reactor with composite PTFE membrane (R-PTFE-P-AA)—were evaluated. The modified membranes displayed enhanced roughness and hydrophilicity, which improved biocompatibility and variably increased the oxygen transfer efficiency. Notably, the R-PVDF-P-AA configuration showed a significant enhancement in the removal rates of NH4+-N and total nitrogen (TN), achieving 78.5% and 61.3%, respectively, which was markedly higher than those observed with the original membranes. In contrast, the modified R-PTFE-P-AA exhibited lower removal efficiencies, with NH4+-N and TN reductions of approximately 60.0% and 49.5%. Detailed microbial community analysis revealed that the R-PVDF-P-AA membrane supported robust commensalism between ammonia-oxidizing and denitrifying bacteria, underpinning the improved performance. These findings highlight the critical role of surface chemistry and microbial ecology in optimizing the function of MABRs.
研究领域:
环境工程
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微生物学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 18
·13360-13370
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IF 2.019
Lu Haowei,Lin Jiaqi,Yang Wenlong,Liu Lizhu
The Ba 0.859 Ca 0.141 Zr 0.106 Ti 0.894 (BCZT) nano-particles were modified by polyimide (PI) through a chemical coating method. And the PI@BCZT/polyvinylidene fluoride (PVDF) flexible composite films were fabricated by solution casting method. The transmission electron microscopy and scanning electron microscopy results show that the nano-particles is about 50 nm, PI is uniformly coated on the surface of BCZT nano-particles about 7–10 nm as well as there are uniform and improved dispersion in the matrix after modification. A series of dielectric properties were carried out. The results show the 50 vol% composites own a remarkably enhanced dielectric permittivity (ε r = 130) at 100 Hz. After modification, the breakdown strength has increased from 20 to 96 kV mm −1 and the loss tangent is reduced from 1.8 to 0.2 at 100 Hz compare with un-modified composites in 40 vol% dopant. With the increase of dopant, ferroelectricity of composites can be enhanced. The optimal residual polarization is 40 vol% PI@BCZT composites, which possess 1.025 μC/cm 2 under 50 kV/mm external electric field. In addition, after modification, thermo-gravimetric analysis exhibits the degradation temperature Td 5% and Td 10% of PI@BCZT/PVDF composites can be enhanced about 5–10 °C and show better thermal stability than un-modified composites.
研究领域:
材料科学
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电气工程
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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）