Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Jiaoxia Sun,Xueting Jiang,Hong Xiang,Xi Wang,Xue Luo,Jiang Fu,Jianxin Fan
Perfluorooctanoic acid (PFOA) and its analogs, such as perfluorocaproic acid (PFHxA), perfluorobutyric acid (PFBA), and perfluoro(2-methyl-3-oxahexanoic) acid (GenX), present environmental contamination concerns due to their toxicity. To addressing this, in this study, we have explored the utility of thermoplastic polyurethane/polyethyleneimine (TPU/PEI) nanofibers , synthesized via electrospinning, for the efficient removal of PFOA and its analogs from aqueous solutions. Combining the positively charged amino groups of PEI and hydrophobicity of TPU potentially enhances adsorption. Further, the TPU/PEI nanofibers exhibit a distinctive nano-phase separation morphology, creating abundant adsorption sites conducive to PFAS binding. Batch adsorption experiments indicated that TPU/PEI nanofibers possess notable adsorption capacities for PFOA and its analogs. The observed adsorption capacities were ranked as follows: PFOA (0.931 mmol/g) > PFHxA (0.872 mmol/g) > PFBA (0.827 mmol/g) > GenX (0.771 mmol/g), thus showing a correlation with their respective octanol–water partition coefficient (K ow ) values. Both inorganic ions and organic matter exerted more pronounced adverse effects on the adsorption of PFBA and GenX than on those of PFOA and PFHxA. This observation can be linked to competitive adsorption with PFAS. Impressively, the TPU/PEI nanofibers maintained a high removal efficiency across multiple regeneration cycles, with more than 95 % adsorption capacity retained after five cycles. To the best of our knowledge, this study is the inaugural demonstration of utilizing a TPU and PEI blend for remediation of both long-chain and short-chain PFAS in highly polluted wastewater, positioning it as a promising, accessible material for such applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Xiaoyu Yang,Yunwu Yu,Xiaowei Sun,Yanfeng Fang,Ying Ma,Peng Liu,Ting Li,Xiangyu Li,Lili Gao
In this study, the dual role of polyethyleneimine (PEI) in the PEEKWC-PEI crosslinked ultrafiltration (UF) membrane was achieved through a two-stage addition method. PEI acted as membrane matrix and additive for the formation and enhancement of PEEKWC-PEI crosslinked UF membrane. The morphological structure, filtration, and permeability properties of UF membranes were studied by selecting suitable PEI concentration and molecular weight. Compared with previously reported studies, the filtration flux was significantly improved while maintaining excellent dye flux, and exhibited extremely low salt ion retention rates, resulting in significantly superior dye/salt separation factors. Increasing the PEI concentration in the casting solution from 0.5 to 4 wt% enhanced the surface pore density and rejection of layer, and the total porosity rose from 71.9 % to 84.5 %. The optimized PEI-1800–2.0 membrane exhibited a pure water flux of 1210.9 LMH and a 99.8 % rejection of Congo red (CR) solution at 3 bar. The molecular weight of additive PEI also showed a significant effect on membrane performances. Among them, the PEI-10000 additive further improved hydrophilicity, elevating the water and dye fluxes to 1309.06 LMH and 786.70 LMH, respectively. The PEI-1800–2.0 membrane can achieve a flux recovery rate (FRR) of 85.8 %, showing excellent contamination resistance. In the test of dye/salt mixed solution with high salt concentration (60 g/L Na 2 SO 4 ), it also showed good retention stability, and the dye removal rate was maintained at 85.5 %. The present work provides a reliable and effective method for the preparation of UF membranes with high filtration performance and high retention capacity even at high salinity. From the comparison of dye/salt separation performance results between membrane in this work and membranes reported in literatures for dye/salt separation, it could be noted that the dye solution flux of PEEKWC-PEI crosslinked UF membrane based on PEI additive significantly improve and the salt retention rate is significantly reduced.
研究领域:
膜科学
·
高分子科学
·
分离技术
·
水处理
·
材料工程
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Bowei Shen,Farong Zhang,Mengqi Zhao,Zhiquan Pan,Qingrong Cheng,Hong Zhou
The magnetic solid acid, Fe 3 O 4 @PEI@SO 3 H, was synthesized and used as a catalyst to transfer steroid saponins into diosgenin in an alcoholysis approach. The results showed that the magnetic solid acid greatly improved the alcoholysis efficiency for extraction diosgenin from steriod saponins. To optimize the parameters for alcoholysis, such as the mass of the solid acid, solvent volume, the reaction temperature and time, single factor experiments as well as response surface experiment have been performed. Under the optimal conditions, the diosgenin yield obtained by alcoholysis is higher than that of the traditional inorganic acid hydrolysis. And it worth to mention that no waste liquid is discharged. The catalyst is very stable and can be used for three times without obvious mass loss and activity decrease, indicating that the technology of extracting diosgenin from Dioscorea zingiberensis C.H. Wright tuber has a broad prospect in industrial application.
研究领域:
生物化学
·
有机合成
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制药工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Li Song,Chunping Su,Hui Li,Huiping Zhao,Rong Chen
To achieve an effective and straightforward method for Cr(VI) removal from industrial wastewater, a composite Bi 2 S 3 /PDA/PEI material (BSPP) was successfully prepared through in-situ polymerization of polydopamine (PDA) followed by chemical grafting with polyethylenimine (PEI) on the surface of Bi 2 S 3 materials for round-the-clock highly efficient Cr(VI) removal from actual industrial electroplating wastewater. Under dark conditions, the maximum adsorption capacity of Cr(VI) by BSPP reaches 780.75 mg/g. Interestingly, when exposed to light, the maximum Cr(VI) removal capacity was further increased to 1333.21 mg/g. X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma optical emission spectrometry (ICP-OES) analyses indicate that BSPP not only reduces Cr(VI) to Cr(III) under light condition, but also facilitates the significant decrease of total chromium content. Notably, under natural sunlight exposure outdoors, BSPP is capable of completely eliminating Cr(VI) from both plating cleaning solutions and waste plating solutions. More importantly, BSPP maintains its original Cr(VI) removal efficiency after nine cycles within plating cleaning solutions and six cycles within waste plating solutions. Large-scale testing results indicate that BSPP can effectively treat substantial volumes of electroplating wastewater to comply with national Cr(VI) discharge standards. These findings suggest that BSPP represents a promising material for continuous 24-hour Cr(VI) treatment in industrial electroplating wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 30
·12109-12117
·
IF 3.069
Yu-Rong Zhan,Qing-Ying Yu,Ji Zhang,Yan-Hong Liu,Ya-Ping Xiao,Ju-Hui Zhang,Xi He,Xiao-Qi Yu
The efficient delivery of therapeutic genes remains a major challenge in realizing a feasible gene-based treatment. Herein, a versatile oligopeptide, glutathione, was introduced to construct novel non-viral cationic gene vectors. Reduced/oxidized forms of glutathione (GSH/GSSG) and relevant amino acids (Glu, Cys, and Gly) were used to modify low molecular weight PEI through surface modification or crosslinking. These polymers could bind well and condense DNA into spherical nanoparticles, which were stable in the presence of serum. The disulfide bonds within the crosslinked polymer GSSG-PEI may facilitate polymer degradation and DNA release under a reductive environment. In vitro transfection experiments reveal that the modification could largely improve the gene transfection efficiency of low molecular weight PEI, especially in the presence of serum. In HeLa cells, GSSG-PEI could even give up to 150 times higher efficiency than PEI 25 kDa. TEM and serum concentration effect assay also demonstrate the good serum tolerance of the polymers. Flow cytometry results show that GSSG-PEI might induce cellular uptake with higher efficiency than PEI 25 kDa, especially in the presence of serum. Results reveal that GSSG is a good candidate for the crosslinking of small cationic molecules to form polymeric gene vectors with improved transfection efficiency and biocompatibility.
研究领域:
遗传学
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分子生物学
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药剂学
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治疗学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2023
·Vol. 17
·期 4
·1-12
·
IF 2.7
Huang Jingda,Wang Yi,Cai Yuxin,Liang Yipeng,Lin Shite,Wang Enfu,Zhong Jinhuan,Zhang Wenbiao,Sheng Kuichuan
It is still a challenge to prepare a water- and polymer-based electrospun air filter film with high efficiency filtration, low pressure drop, and good mechanical properties. To address this issue, polyvinyl alcohol (PVA) was employed as the main material, mixing polyethyleneimine (PEI), bamboo-based activated carbon (BAC) and cellulose nanocrystal (CNC) to construct the air filter film by electrostatic electrospinning. In this system, the negatively charged BAC and CNC are fixed in the system through bonding with the positively charged PEI, showing a double adsorption effect. One is the mechanical filtration of the porous network structure constructed by PVA@PEI electrospun nanofibers, and the other is the electrostatic adsorption of PM2.5 on the surface of BAC and CNC. It is significant that the resulting composite air filter displays a high filtration efficiency of 95.86%, a pressure drop of only 59 Pa, and good thermal stability. Moreover, the introduced methyltrimethoxysilane (MTMS) endows it with good water-resistance. Given these excellent performances, this system can provide theoretical and technical references for the development of water- and polymer-based electrospun air filter film.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 10
·107505
·
IF 3.721
Peijin Wang,Qian Wu,Caixia Wang,Yuxin Pu,Mao Zhou,Mingxiao Zhang
In this work, a sensitive polyethylenimine functionalized Perylene derivative PTC-PEI, S2O82− and 3D flower-like MoS2 (3D MoS2 NFs) ternary system was fabricated for quantitation of Methotrexate (MTX) based on the quenched electrochemiluminescence (ECL) signals. Specifically, the PTC-PEI was prepared via cross-linking Perylenetetracarboxylic acid (PTCA) and polyethylenimine (PEI). Then, the hybrid nanocomposite PTC-PEI-MoS2 was synthysized through electrostatic absorption effect between PTC-PEI and 3D MoS2 NFs. With the excellent catalytic effect of 3D MoS2 NFs towards the electrochemical reduction process of S2O82− thus resulting in generation of more sulfate radical anions (SO4·−), the ECL signal probe PTC-PEI-MoS2 exhibits higher luminous efficiency compared with PTC-PEI (3-fold enhancement). In addition, electrochemical regenerable property of Mo6+/Mo4+ active sites endows 3D MoS2 NFs excellent signal enhancement efficiency. Under the optimum conditions, a linear range from 10 μM to 1pM with the limit of detection down to 0.15 pM could be obtained in MTX determination. Notably, the proposed strategy provides a new idea for sensitive determination of MTX.
研究领域:
分析化学
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纳米材料
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电化学
·
生物传感器
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2018
·
IF 6.603
Ping Xu,Wei Wang,Xiaoming Qian,Haibo Wang,Changsheng Guo,Nan Li,Zhiwei Xu,Kunyue Teng,Zhen Wang
To effectively separate Mg 2+ and Li + from salt lake brine with high Mg 2+ /Li + mass ratio, a positive charged nanofiltration membrane with abundant -NH 3 + and -NH 2 + was designed and fabricated via interfacial polymerization between polyethyleneimine (PEI) and trimesoyl chloride (TMC) on the polyethersulfone ultrafiltration membrane. Zeta potential test revealed that at pH below 9.3, the resulting membrane exhibited a high positive charge due to a large amount of unreacted amine groups on the PEI branch. In the separation process, Donnan exclusion effect dominated the separation performance of resulting membranes for Mg 2+ and Li + . The results showed that the Mg 2+ /Li + mass ratio declined from initial 20 to 1.3 and the separation factor S Mg , Li was as low as 0.05 with a pure water permeation of 5.02 L/(m 2 hbar) after filtration with resulting NF membrane. The difference between the rejection for Mg 2+ and Li + reached up to 76%. Compared with membrane in previous studies, the separation performance for Mg 2+ and Li + of positive charged NF membrane prepared in this work increased more than one time. This research demonstrated the potential of positive charged PEI-TMC composite NF membrane for the separation of Mg 2+ and Li + from salt lake brine with high Mg 2+ /Li + mass ratio.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhang-Hong Wan,Jing Guan,Chun-Miao Zhang,Wen-Qing Fei,Lin Wang,Shu-Guang Wang,Xue-Fei Sun
Membrane fouling and the trade-off between membrane permeability and selectivity restrict the potential applications of membrane filtration for water treatment . ZIF-8 was found having great permeability and antibiofouling performance, but with issue on particle aggregation makes it difficult to achieve high ZIFs loading and fabricate a defect-free molecular sieving membrane in previous research. In this study, we formed a scalable antibiofouling surface with improved permeability and fouling resistance on a PEI-ZIF-PAA membrane using a layer-by-layer assembly technique. The synergistic effects of being sandwiched between two different polyelectrolyte layers with opposite charges endowed the ZIF nanoparticles with improved stability and scalability for membrane modification. The PEI-ZIF-PAA membrane exhibited a satisfactory water flux of 120.78 LMH, which was 46.97% higher than that of the pristine PES membrane. The normalized water flux loss was serious in the absence of ZIF-8, and the flux increased with the ZIF-8 concentration. Antifouling tests suggested that the PEI-ZIF-PAA membrane possessed good antifouling performance due to the much higher surface hydrophilicity and positive Lewis acid-base interactions with foulants. The HA rejection increased with the ZIF-8 concentration and reached a maximum of 92.1% in the presence of 1.00% (w/v) ZIF-8. The membrane regeneration was tested under physical and chemical cleaning with flux recovery rates of about 85% and 95%. XDLVO analysis showed that the total interaction energy between HA and the PEI-ZIF-8-PAA membrane was 26.45 mJ/m 2 , and the superior antifouling performance was mainly attributed to Lewis acid-base interactions. This study indicates that ZIF-8 nanocrystals are promising materials for fabricating novel membranes for sewage treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 38
·7623-7630
·
IF 4.726
T. Y. Cheang,Z. H. Xing,Z. L. Li,H. Y. Zhou,J. H. Wei,X. Zhou,A. W. Xu,Y. Lin,S. M. Wang
Here, a novel carrier fabricated by the interaction of negatively charged heparin and positively charged PEI and Ca2+ was investigated to deliver AIB1 siRNA into breast cancer cells both in vitro and in vivo. Ca2+/PEI/heparin nanoparticles were prepared by simply mixing heparin, PEI and CaCl2 aqueous solution. Heparin in the Ca2+/PEI/heparin nanoparticles (40.9% heparin, w/w) decreased the cytotoxicity of PEI. According to the MTT assay, Ca2+/PEI/heparin NPs are superior to commercial Lipofectamine 2000 considering the safety. The Ca2+/PEI/heparin NPs are able to deliver siAIB1 into breast cancer cells as effectively as Lipofectamine 2000 both in vitro and in vivo. The in vivo experiment also indicated that the NF-κB/BCL-2 signal pathway might be the downstream signal pathway of AIB1 in regulating breast cancer proliferation and progression.
研究领域:
癌症研究
·
纳米技术
·
分子生物学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Shiyang Li,Chenchen Zheng,Longdou Tu,Dajian Cai,Yangxiang Huang,Congjie Gao,Yeqiang Lu,Lixin Xue
Tight ultra-filtration (TUF) membranes were constructed by in situ growing zinc imidazole frameworks micro-crystalline leaves (ZIF-L) in polyethylene imine (PEI) and polydopamine (PDA) deposit layers on porous polyethylene (PE) substrates. The effects of preparation conditions on the surface physical and chemical structures as well as on the dye/salt separation performance of the formed TUF membranes were systematically investigated. By inserting selective water permeation channels and increasing contacting surface areas, in situ-grown ZIF-L arrays tightly cross-linked in the coating matrix greatly increased water permeation without trading off dye/salt retention selectivity. The morphology of the included ZIF-L particles could be varied by adjusting the ligand/Zn molar ratio (α) in the preparation processes. Optimized PDA-PEI/ZIF-L@PE TUF membranes containing ZIF-L of cross-cross block morphology showed very high pure water permeability of 180 ± 20 L·m −2 ·h −1 ·bar −1 (LMHB) and retention selectivity (S CR/Na2SO4 and S MB/Na2SO4 ) of 267 and 43, respectively, as well as excellent stability and anti-fouling properties.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 20
·2451-2461
·
IF 3.4
Jingda Huang,Shite Lin,Yipeng Liang,Enfu Wang,Yu Miao,Wenbiao Zhang,Kuichuan Sheng
It is still a serious challenge to construct a water-soluble polymer-based air filtration membrane with high efficiency and good mechanical properties by electrospinning. In the study, using polyvinyl alcohol (PVA) and polyacetylimide (PEI) as the main materials, both nanocellulosic crystal (CNC) and zinc oxide (ZnO) as the synergistic reinforcers and methyltrimethoxysilane (MTMS) as the hydrophobic modifier, the electrospun PVA/PEI/CNC/ZnO composite nanofibrous membrane with dual air filtration mechanisms was established. One of the mechanisms was the interception of the three-dimensional network structure built by the composite nanofibrous membrane, the other was the electrostatic adsorption provided by CNC. Based on the dual air filtration mechanisms, the filtration efficiency of particulate matter 2.5 (PM2.5) reached 98.20%. Moreover, the composite nanofibrous membrane displayed a good thermal stability and could still maintain more than the filtration efficiency of 83% and low-pressure drop after treatment at 200 °C for 1 h. Moreover, the composite nanofibrous membrane could still maintain the filtration efficiency (97.3%) and low-pressure drop (110.7 Pa) after five washing cycles after filtration, reflecting good reusability. Interestingly, the PVA/PEI/CNC/ZnO composite nanofibrous membrane was simple to produce and demonstrated excellent filtration efficiency, as well as excellent thermal stability, which could be an effective barrier against PM2.5 invasion. Graphical
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 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）