ACS Applied Polymer Materials
·
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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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2021
·Vol. 28
·期 9
·1-12
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IF 3.097
Meng Haitao,Liang Haiou,Xu Tong,Bai Jie,Li Chunping
To achieve the effluent standards or water purification, many water-treatment methods including membrane separation have been applied to separate the oily contaminations and clean water. However, most of the membranes displayed a low separation efficiency or poor reusability due to the functional group loss or their surface adhesion of contaminations including oil and biofoulings. Thus, in this work, a hydrophilic crosslinked PVP membrane was facilely prepared via the electrospinning and crosslinking. Crosslinking solves the problem of loss of hydrophilic components in the separation process, and the cPVP-PAN membrane has high hydrophilicity and excellent pollution resistance. The cPVP-PAN membrane showed a high separation flux (20,610 L m −2 h −1 bar −1 ) and an excellent separation efficiency (above 97%) for the oil–water mixtures. At the same time, the membrane has good separation capacities for different oil–water mixtures. Importantly, it shows high separation flux of O/W emulsion (569 L m −2 h −1 ) only under gravity conditions and a low flux-loss (8.08% after 10-cycle filtration). Furthermore, the membrane could effectively resist the contamination of BSA protein and oil, the flux recovery rates (FRRs) were more than 87.6%. Such membrane shows a broad application prospect in the complex water environmental remediation.
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
Journal of Environmental Sciences
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2022
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IF 6.796
Wenjing Tang,Yunyi Meng,Bin Yang,Dongyu He,Yan Li,Bojun Li,Zheming Shi,Changwei Zhao
Nanofiltration (NF) process has become one of the most promising technologies to remove micro-organic combined water pollution . Developing a NF membrane material with efficient separation for perfluorooctanoic acid (PFOA) combined pollution is highly desired, this manuscript targets this unmet need specifically. In this work, hydrophilic SiO 2 nanoparticles with various contents blended with carboxylic multiwalled carbon nanotube were used to modify poly (m-phenylene isophthal amide) (SiO 2 /CMWCNT/PMIA) hollow fiber NF membrane. The modified membrane with 0.1 wt% SiO 2 doping exhibits way better fouling resistance with irreversible fouling ratio decreased dramatically from 18.7% to 2.3%, and the recovery rate of water flux increases significantly from 81.2% to 97.7%. The separation experiment results had confirmed that the modified membrane could improve the rejection from 97.2% to 98.6% for perfluorooctanoic acid (PFOA) and its combined pollution with bovine serum albumin (BSA). It is clear that this reported SiO 2 /CMWCNT/PMIA hollow fiber NF membrane potentially could be applied in water treatment . This research also provides a theoretical basis for efficiently removal of PFOA and its combined pollution by NF membrane.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 63
·51364-51370
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IF 3.84
Zongxue Yu,Yang Pan,Yi He,Guangyong Zeng,Heng Shi,Haihui Di
As part of this work, polyvinylidene fluoride (PVDF) membranes were prepared via a phase inversion method. A novel β-cyclodextrin (β-CD)–PVDF membrane was prepared via an interfacial reaction, using Trimesoyl Chloride (TMC) and β-CD as cross-linking and modification agents, respectively. The membranes were modified by a simple dip-coating method. The results of comparison between the modified and unmodified membranes by attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR) and X-ray photoelectron spectroscopy (XPS) methods confirmed successful grafting of β-CD on the membrane surfaces. The morphology of the membrane was investigated by scanning electron microscopy (SEM) and atomic-force microscopy (AFM). The roughness of PVDF membranes increased after their surfaces were grafted with β-CD. It was also found that β-CD–PVDF membranes had higher permeate flux and hydrophilicity than those of the pristine PVDF membranes. Furthermore, in protein fouling experiments, bovine serum albumin (BSA) was used as a protein model solution. Modified membranes exhibited a higher flux recovery ratio. The experiment showed that the anti-fouling performance of β-CD–PVDF membranes was more effective in reducing the irreversible membrane fouling. The results of this study hold promise for useful applications of β-CD–PVDF membranes in membrane separation areas.
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 Water Process Engineering
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2024
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IF 6.3
Meng Zhang,Daliang Xu,Yanrui Wang,Jiaxuan Yang,Xiaobin Ma,Junwen Ding,Peijie Li,Langming Bai,Heng Liang
Ceramic membrane technology is effective for oil emulsion separation, while its low permeance and fouling issue yield high energy consumption in practical applications. Herein, a series of ceramic membranes were fabricated by incorporating the SiO 2 sintering aid into Al 2 O 3 ceramic powder using a compression molding method. Due to the melting and recrystallizing of SiO 2 on the surface of coarse grains, the modified ceramic membrane exhibited the underwater superoleophobicity property. After optimizing the fabrication conditions, including sintering temperature, molar ratio of Al 2 O 3 /SiO 2 and molding pressure, the modified ceramic membrane had a pure water permeance of 1319 L·m −2 ·h −1 ·bar −1 and a petroleum ether rejection rate of 97.1 %. In addition, the increase in the square quartz phase narrowed the pore size and improved the hydrophilicity of the ceramic membrane, thereby alleviating the pore blocking and enhancing the flux recovery. The flux recovery rate was about 86.1 % after the sodium hydroxide backwashing. This study presents a rational strategy for developing ceramic membranes with scalable potential for efficient oil 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
CHEMOSPHERE
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2024
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IF 8.1
Guoying Feng,Zhilu Wang,Man Xu,Cunwen Wang,Yanbo Li
The design of hydrophilic polyvinylidene fluoride (PVDF) membranes with anti-fouling properties has been explored for decades. Surface modification and blending are typical strategies to tailor the hydrophilicity of PVDF membranes. Herein, cyclodextrin was used to improve the antifouling performance of PVDF membranes. Cyclodextrin-modified PVDF membranes were prepared by coupling PVDF amination (blending with branched polyethyleneimine) and activated cyclodextrin grafting. The blending of PEI in the PVDF casting solution preliminarily aminated the PVDF, resulting in PEI-crosslinked/grafted PVDF membranes after phase inversion. Aldehydes groups on cyclodextrin, introduced by oxidation , endow cyclodextrin to be grafted on the aminated PVDF membrane by the formation of imines. Borch reduction performed on the activated cyclodextrin-grafted PVDF membrane converted the imine bonds to secondary amines, ensuring the membrane stability. The resulting membranes possess excellent antifouling performance, with a lower protein adsorption capacity (5.7 μg/cm 2 , indicated by Bovine Serum Albumin (BSA)), and a higher water flux recovery rate (FRR = 96%). The proposed method provides a facial strategy to prepare anti-fouling PVDF membranes.
研究领域:
材料科学
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环境工程
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 140
·期 5
·e53412
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IF 3.057
Xin Yang,Xiao Ma,Jingjing Yuan,Xia Feng,Yiping Zhao,Li Chen
Inorganic nanoparticles (NPs) have been employed in modification for polyvinyl chloride (PVC) membrane intrinsic hydrophobicity. Carboxymethyl chitosan (CMC), a natural organic matter, was used to relieve the agglomeration of zinc oxide (ZnO) NPs in the membrane matrix. In this paper, ZnO-CMC NPs were successfully prepared via co-precipitation approach, blended with PVC membranes, and the effect of ZnO-CMC NPs for the membrane properties was studied. The SEM and EDX confirmed excellent dispersion of ZnO-CMC NPs on the membrane surface. The enhanced hydrophilicity, porosity and inter-connected finger-like strcture of modified membranes confirmed by water contact angle and SEM. In addition, pure water flux of PVC/ZnO-CMC composite membrane was 107.36 L m −2 h −1 (PVC/ZnO-CMC (0.25 wt%)), which was higher than that of neat PVC membrane (83.11 L m −2 h −1 ). Importantly, the modified membranes exhibits lower static BSA adsorbtion because of the improved hydrophilicity, and a higher flux recovery rate (>90%) after three sequential filtration cycles. The antibacterial behavior of PVC/ZnO-CMC membrane was tested simply using Escherichia coli , and the results indicated that all composite membranes possess excellent antibacterial properties. Our work presents PVC/ZnO-CMC NPs composite membrane a promising future in wastewater treatment and antibacterial application.
研究领域:
材料科学
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环境工程
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生物医学
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高影响因子
Journal of Materials Chemistry B
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2024
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IF 6.1
Saitao Yan,Qisheng Ye,Jiayi Wu,Wangli Yao,Baoliang Chen,Xiaoying Zhu
The primary focal point in the fabrication of microfiltration membranes revolves around mitigating issues of low permeability stemming from the initial design as well as countering biofouling tendencies. This work aimed to address these issues by synthesizing an antibacterial capsaicin derivative (CD), which was then grafted to the poly(vinylidene fluoride-co-chlorotrifluoroethylene)-g-polymethacrylic acid (P(VDF-CTFE)-g-PMAA) matrix polymer, resulting in an antibacterial polymer (PD). Notably, both CD and PD demonstrated low cytotoxicities. Utilizing PD, a microfiltration membrane (MA) was successfully prepared through non-solvent-induced phase inversion. The pore sizes of the MA membrane were mainly concentrated at around 436 nm, while the pure water flux of MA reached an impressive value of 62 ± 0.17 Lm−2 h−1 at 0.01 MPa. MA exhibited remarkable efficacy in eradicating both Gram-negative (E. coli) and Gram-positive bacteria (Bacillus subtilis) from its surface. Compared with M1 prepared from P(VDF-CTFE), MA exhibited a lower flux decay rate (41.00% vs. 76.03%) and a higher flux recovery rate (84.95% vs. 46.54%) after three cycles. Overall, this research represents a significant step towards the development of a microfiltration membrane with inherent stable anti-biofouling capability to enhance filtration.
研究领域:
环境工程
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材料科学
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生物技术
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Pengbo Zhao,Bowen Yao,Junquan Meng,Rui Zhang,Bing Cao,Pei Li
Pervaporation (PV), as a cost-efficient concentrating process, has been studied for Zero Liquid Discharge (ZLD) of desalination. Although high water flux and excellent salt rejection have been reported for many PV membranes. The desalination performance, fouling behavior, and cleaning protocol for treating real reverse osmosis concentrate (ROC) generated from industrial plants have never been studied. Meanwhile, understanding the fouling behavior and cleaning method in the treating process is crucial for the development of suitable PV desalination membranes. In this study, we used a lab-made PV membrane to treat industrial ROC with a high chemical oxygen demand (COD) value and high salt concentrations. The results showed that conductivity and COD of the produced water were below 20 μs/cm and 70 mg/L, respectively, which fulfilled the discharge standard. However, the membrane fouling problem was not trivial. To address the fouling issue, a chemical softening method was adopted to remove the calcium salts of the ROC, and a membrane cleaning method was developed to regenerate the water flux. As a result, a long-term water flux of 31.27 kg/m 2 ·h with a flux recovery rate of 98% were realized. This highlights the potential of PV desalination technology for ROC reclamation.
研究领域:
环境科学
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材料科学
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水处理工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2013
·
IF 2.206
Jinming Peng,Yanlei Su,Wenjuan Chen,Xueting Zhao,Zhongyi Jiang,Yanan Dong,Yan Zhang,Jiazhen Liu,Xiaochen Fan
In this study, a solvent-free approach to antifouling membranes is tentatively presented. The membrane bulk matrix is formed through bulk polymerization of liquid monomer 2-hydroxyethyl methacrylate (HEMA) in the absence of an organic solvent. The membrane pores are formed via removal of silica particles generated from the sol–gel process of tetraethyl orthosilicate. The membranes have a homogeneous structure and acquire water flux around 1020 L m–2 h–1 at 0.1 MPa. The rates of rejection of the yeast and oil droplet for all the polyHEMA membranes are above 97.0 and 99.0%, respectively. The polyHEMA membranes exhibit strong hydrophilic and excellent fouling resistance properties as a result of hydrophilic HEMA. The flux recovery ratio is as high as 91.0% using protein as a foulant. After the fluorine-containing additive dodecafluoroheptyl methacrylate (DFHM) had been blended in a casting solution, the poly(HEMA/DFHM) membranes possess an amphiphilic surface and exhibit excellent fouling resistance as well as fouling release properties. The flux recovery ratio is >90%, and the total flux decline ratio is as low as 11.7% using an oil/water emulsion as the foulant.
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
HIGH PERFORMANCE POLYMERS
·
2016
·
IF 1.045
Yang Liu,Yuping Ai,Pengfei Huo,Haitao Huang,Jiyou Gu
In this study, a new kind of membrane material, an aromatic zwitterionic polyimide (PI) copolymer, was synthesized through a one-pot polymerization reaction by precise variation of the molar ratios of different monomers with specific groups. The zwitterionic PI ultrafiltration (UF) membrane was prepared through an immersion precipitation phase inversion method and thoroughly characterized by scanning electron microscopy, water contact angle measurement, protein adsorption measurement, and UF experiment. The zwitterionic PI membrane showed significantly improved hydrophilicity and permeability and stable antifouling property. The amount of bovine serum albumin adsorbed on the zwitterionic PI membrane was considerably lower compared with the reference PI membrane. According to the cycle UF experiment for protein solution, the zwitterionic PI membrane had a water flux recovery ratio of 86.7%, compared with only 61.1% for the reference PI membrane. Moreover, the irreversible fouling of the zwitterionic PI membrane was significantly decreased, suggesting superior antifouling property. This new approach to the preparation of a zwitterionic polymer seems promising for potential applications in separation membrane.
研究领域:
材料科学
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膜技术
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生物医学工程
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Jiangnan Dai,Shuai Wang,Pan Chen,Xiaohua Tong,Xiaogang Zhao,Chunhai Chen,Hongwei Zhou
To minimize the organic/biological contamination, polymeric membranes with tertiary amine groups were synthesized and its surface was modified to obtain three types of quaternary ammonium modified ultrafilters. The antifouling and antibacterial properties of all prepared ultrafilters were studied. The performances differences of ultrafiltration membranes with different alkyl chain lengths of quaternary ammonium salts were explored. The results show that the increase of alkyl chain length of quaternary ammonium salts and the introduction of hydroxyl groups can effectively improve the permeability and anti-pollution performance of ultrafiltration membranes. After one cycle of Bovine serum albumin solution filtration test, the flux recovery ratio of the modified membrane is twice as much as that of the initial membrane, while the flux recovery ratio of the initial ultrafiltration membrane is only 36.6%. At the same time, the modified membrane has excellent antibacterial properties and water flux stability, which is conducive to the long-term use of the membrane.
研究领域:
材料科学
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环境工程
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生物医学
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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）