SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yaqi Zhang,Linli Tan,Na Han,Shiwei Tian,Wei Li,Wei Wang,Yutong Wu,Zhongshun Sun,Xingxiang Zhang
The separation of oil-in-water and water-in-oil emulsions with high efficiency and environmental friendly remains a challenge in the past decade. This work describes a new method to improve the trade-off of the poly(acrylonitrile- co -methyl acrylate) (P(AN-MA))-based membrane for water/oil separation. P(AN-MA) microfiltration (MF) membrane was fabricated via thermally induced phase separation (TIPS) method in this study. Then, some of the –CN groups and –COOCH 3 groups were converted to –COOH groups via hydrolyzing. Finally, the selected wettability was attained by grafting PEI on one side while ZIF-8 was anchored to the other side via self-assembly and in-situ interfacial reaction methods. The ZIF-8/P(AN-MA) hybrid MF membranes are superoleophobic underwater on the PEI side while super-hydrophobic under oil on the ZIF-8 side, which can efficiently and accurately separate oil-in-water and water-in-oil emulsions at a low pressure (0.01 MPa). The separation fluxes of the PEI side were as high as 3053 L/m 2 h and 1035 L/m 2 h respectively, for the surfactant-free mixtures and surfactant-stabilized emulsions. For water-in-oil emulsions, the fluxes were up to 2316 L/m 2 and 878 L/m 2 h on the ZIF-8 side, respectively. The separation efficiency of all the mixtures and emulsions was higher than 97.5 %. Moreover, the Janus membranes showed excellent anti-oil-fouling and anti-water-fouling properties on the two sides of the membranes, as well as remarkable durability during the 10 cycles in oil/water separation. Hence, Janus ZIF-8/P(AN-MA) hybrid MF membranes show potential application prospects in oil/water separation.
研究领域:
材料科学
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环境工程
·
化学工程
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产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2020
·Vol. 298
·期 8
·1053-1061
·
IF 1.536
Cai Shuwei,Gu Shiyu,Li Xian,Wan Songhan,Chen Songbo,He Xianru
A controlled grafting modification starch exhibited tunable phase transition temperature in aqueous solution was prepared via reversible addition–fragmentation chain transfer (RAFT) polymerization and esterification reaction under mild condition. P(AM/AN) copolymer was grafted onto the starch backbone and endowed the grafted copolymer thermosensitivity. The molecular structure and composition of P(AM/AN) copolymers were characterized by gel permeation chromatography (GPC), FTIR, and NMR, indicating a structurally controllable side chain of the grafted copolymer. Results of X-ray diffraction (XRD) demonstrate that the crystallinity of grafted copolymer decreases compared with starch due to side chains destruct the structural regularity of starch. Scanning electron microscopy (SEM) images show that grafted copolymer displays a rough, multilayer, and irregular morphology. Dynamic light scattering (DLS) and UV tests indicate that the grafted copolymer forms aggregates in aqueous solution and the UCST of the grafted copolymer is dependent on percent grafting (PG) and molecular interactions of side chains.
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yizhi Chen,Zhiyi Wang,Xiaofan Yang,Zifang Guo,Weiqun Shi,Peng Zhang,Mingzhang Lin
2,9-Diamide-1,10-phenanthroline (DAPhen) extractants constitute a novel class of tetradentate agents due to their high affinity for actinides and their adherence to the CHON principle. In this investigation, we explored the performance in extraction and the capabilities for An/Ln separation of a series of N,N′-diethyl-N,N′-diethyl-2,9-diamide-1,10-phenanthroline (Et-Et-DAPhen), N,N′-dioctyl-N,N′-dioctyl-2,9-diamide-1,10-phenanthroline (Oct-Oct-DAPhen), N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), and N,N′-dialkyl-N,N′-diphenyl-2,9-diamide-1,10-phenanthroline (R-Ph-DAPhen, R = H, Me, Et, Oct) extractants featuring diverse amide substituents. Combining extraction experiments with theoretical calculations reveals that substituting ethyl with octyl enhances the extraction efficiency. Moreover, phenyl amide substituents exhibit superior extraction properties compared with alkyl counterparts. Augmenting the alkyl carbon chain length of the amide substituent proves beneficial for improving extraction performance. In contrast to alkyl, tolyl substituents demonstrate an enhanced favorability for extraction. By comparing the extraction performance and separation performance before and after irradiation, combined with theoretical calculations, it reveals that appropriately increasing the carbon chain length of the amide substituent can enhance radiation stability. Additionally, the incorporation of phenyl-substituted alkanes contributes to the heightened radiation stability of the extractant. This work promises to contribute to the structural design and performance optimization of novel extractants for An–Ln separation, thereby facilitating advances in extraction and separation methodologies.
研究领域:
核化学
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分离科学
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锕系与镧系化学
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辐射化学
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配位化学
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有机合成
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Cui Yuanlu,Yang Rongjie,Lan Yanhua,Zhai Jinxian
Ammonium dinitramide (ADN), an emerging green oxidizer for rocket propellants, faces application limitations due to its low-temperature thermal decomposition characteristics. This study investigates the impact of a small amount of ammonium nitrate (AN) doped into ADN crystal on the stability of ADN crystal. ADN crystal samples containing AN were prepared by solution evaporation method and solvent-antisolvent method, respectively. The results show that AN and ADN form solid solution crystal by solution evaporation method, while solvent-antisolvent method produces phase-separated AN/ADN mixture. Isothermal thermogravimetric analysis conducted at 318–333 K revealed significant decomposition mass loss (3.2–17.5%) exclusively in solid solution samples, whereas the samples of phase-separated AN/ADN crystals show good thermal stability. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), and ion chromatography (IC) were used to investigate the influence of different forms and contents of AN in ADN samples on the low-temperature thermal decomposition properties of ADN. The kinetic models in different decomposition stages were obtained by isothermal kinetic method. Molecular dynamics simulations revealed the decomposition mechanism that the doping of AN induced the elongation of N–N bonds in the surrounding ADN structure, leading to instability of the ADN structure. These findings provide a theoretical basis for improving the stability of ADN in storage and application. Graphical
研究领域:
材料科学
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化学工程
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物理化学
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推进剂与炸药
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Jiarong Lv,Qinchuan Wei,Xuewen Gong,Enming Du,Shijin Zhang
Extracellular adenosine triphosphate (ATP) plays a crucial role in recruiting neutrophils, which then release neutrophil elastase (NE) to address inflammatory stimuli. However, there has been no prior report on the simultaneous measurement of ATP and NE levels under inflammatory conditions. Herein, we have developed a dual-color molecular fluorescent probe, termed AN, that allows for the simultaneous detection of ATP and NE, providing insights into their interactions during inflammation. AN demonstrates excellent sensitivity and minimal spectral crosstalk, with distinct detection channels for ATP (λ ex = 540 nm, λ em = 583 nm) and NE (λ ex = 450 nm, λ em = 531 nm). It shows high selectivity in sensing ATP and NE within cell cultures, even amidst complex biological environments. Notably, AN effectively distinguishes the progression of inflammatory conditions in vivo . Our findings reveal a direct correlation between ATP and NE levels in inflamed tissues and offer valuable insights for monitoring inflammation and guiding clinical interventions.
研究领域:
生物化学
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分子生物学
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炎症研究
·
荧光探针
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产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2017
·Vol. 74
·期 12
·5231-5247
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IF 1.43
Yang Dongcheng,Yu Lili,Chen Hou,Yu Yanbo,Xu Yuanyuan,Sun Jinming,Wang Yating
Bromoactylated apple seeds (BAS) was used as new source for the synthesis of environmental adsorbent. Apple seeds were modified by bromoacetyl bromide to obtain a macroinitiator for single electron transfer-living radical polymerization (SET-LRP) of acrylonitrile (AN). The amidoxime (AO) adsorbent was prepared by the reaction of the graft copolymer bromoactylated apple seeds (BAS)/polyacrylonitrile (BAS- g -PAN) with hydroxylamine. Amidoxime BAS- g -PAN (AO BAS- g -PAN) was used to remove Pb(II) and the maximum adsorption for Pb(II) was 1.58 mmol/g. AO BAS- g -PAN could also selectively adsorb Pb(II) from binary ion systems in the existence of Ag(I), Ni(II) and Zn(II). This efficient modifying approach provides a new powerful mean toward filling the gap on apple waste as a potential source for controlling heavy metal pollution.
研究领域:
环境科学
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高分子化学
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废物管理
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaotang Shi,Tianle Zheng,Jianwei Xiong,Bingying Zhu,Ya-Jun Cheng,Yonggao Xia
Increasing the working voltage of lithium-ion batteries (LIBs) is an efficient way to increase energy density. However, high voltage triggers excessive electrolyte decomposition at the electrode–electrolyte interfaces, where the electrochemical performance such as cyclic stability and rate capability is seriously deteriorated. A new synergistic positive and passive approach is proposed in this work to construct a stable electrode–electrolyte interface at high voltage. As a positive approach, inorganic lithium sulfide salt (Li2S) is used as an electrolyte additive to build a stable cathode electrolyte interface (CEI) at the LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode surface. In a passive way, acetonitrile (AN) is applied as a solvent additive to suppress oxidative decomposition of a carbonate electrolyte via preferential solvation with a lithium ion. Because of the synergistic interaction between the positive and passive approaches, the cyclic stabilities of NCM523/Li cells improved with a tiny amount of Li2S (0.01 mg mL–1) and AN (0.5 vol %). The capacity retention increased to 80.74% after 200 cycles compared to the cells with the blank electrolyte (67.98%) and AN-containing electrolyte (75.8%). What is more, the capacity retention of the NCM523/graphite full cell is increased from 65 to 81% with the addition of the same amount of Li2S and AN after 180 cycles. The mechanism is revealed on the basis of the theoretical calculations and various characterizations. The products derived from the preferential adsorption and oxidation of Li2S on the surface of NCM523 effectively increase the content of inorganic ingredients. However, the presence of AN prevents oxidation of the solvent. This study provides new principle guiding studies on a high-voltage lithium-ion battery with excellent electrochemical performance.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Xiaoqing Zhao,Na Wang,Hou Chen,Liangjiu Bai,Hui Xu,Wenxiang Wang,Huawei Yang,Donglei Wei,Lixia Yang
In this paper, a functional nanoprobe based on graphene oxide (GO) composites was successfully prepared for detection of mercury ion (Hg(II)) with high sensitivity. GO as a substrate was modified and used for the growth of polymer chains to synthesize polyacrylonitrile-grafted GO (PAN- g -GO) by activator generated by electron transfer atom transfer radical polymerization (AGET ATRP). Under the condition of visible light shines, the PAN- g -GO was further modified to prepare [poly(acrylonitrile- co -vinyl(diphenyl pyridine))]-grafted GO (P(AN- co -PHPY)- g -GO) nanomaterial by one-step synthesis. Finally, P(AN- co -PHPY)- g -GO as a nanoprobe was dropped to the surface of the glassy carbon electrode and assembled to the electrochemical sensor . Moreover, it can effectively improve the enrichment capacity of mercury ions and increase the electron transfer rate on the electrode surface. Differential pulse anodic stripping voltammetry (DPASV) was used to evaluate the electrochemical performance. Under optimum conditions, the response of Hg(II) at this resulting sensor was linear in the range of 2.0 μM~0.1 nM with a detection limit of 0.06 nM. Additionally, this sensor showed excellent reproducibility, selectivity and stability.
研究领域:
纳米技术
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材料科学
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分析化学
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环境科学
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产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yi Zou,Wentao Zhao,Shixin Liu,Hui Fang,Lvjin Gao,Yuting Wang,Yinli Su,Li Chen,Zhaolin Liu
Graphical In this study, an innovative AN-based copolymers gel polymer electrolyte is envisaged by introducing a crosslinker-EGDMA and high-strength glass fiber skeleton, which achieves superior electrochemical properties through the synergistic effect between C≡N and C=O. Furthermore, it is facilitated effectively to inhibit the growth of lithium dendrites, which is demonstrated by XPS and SEM. Solid-state lithium-metal batteries (SSLMBs) have attracted great attention due to their outstanding advantages in safety, electrochemical stability and interfacial compatibility. However, the low ionic conductivity and narrow electrochemical window restrict their practical application. Herein, in-situ polymerization electrolytes (IPEs) crosslinked by acrylonitrile (AN) and ethylene glycol dimethacrylate (EGDMA) exhibit the superior ionic conductivity of 1.77×10 −3 S cm −1 at 25 °C, the ultrahigh lithium transference number (tLi+) of 0.784 and the wider electrochemical stable window (ESW) of 5.65 V. The IPEs make the symmetrical Li||Li cells achieve the highly stable lithium stripping/plating cycling for over 3000 h at 0.1 mA cm −2 . Meanwhile, IPE endows the solid-state LiFePO 4 ||Li batteries with an excellent long-cycle performance over 700 cycles at 2.5 C with a capacity retention ratio over 95 %, as well as 1000 cycles at 1 C and superior capacity retention of 85 %. More importantly, the in-situ polymerized electrolytes containing polyacrylonitrile (PAN) open up a new frontier to promote the practical application of solid-state batteries with high safety and high energy density via in-situ solidification technology.
研究领域:
材料科学
·
电化学
·
电池技术
·
聚合物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Recent Patents on Nanotechnology
·
2020
·Vol. 14
·期 1
·42-45
·
IF 0.977
Li Xiao-Xia,He Ji-Huan
Background: The patented bubble electrospinning, which is a simple and effective technique for mass-production of polymer nanofibers, has been studying extensively, but it is still under development. In the bubble electrospinning, multiple jets move from the positive electrode to the
receptor, a long distance between the two electrodes is needed to guarantee complete solvent evaporation, as a result a relative high voltage is needed. Objective: The aim of the present study is to use an auxiliary electrode and an auxiliary air flow to improve bubble electrospinning
with lower voltage and higher output than those by its traditional one. Methods: The modification of the bubble electrospinning with an auxiliary electrode and an auxiliary airflow is used to fabricate nanofibers. The auxiliary electrode is close to the positive electrode. The experiment
was carried out at room temperature with 8%PVA solution. The result was analyzed with a S4800 cold field scanning electron microscope (SEM, Hitachi S-4800, Tokyo, Japan). Results: The auxiliary electrode can generate a strong induced electric field force. With the action of airflow, the
jets will fly to the receptor instead of the auxiliary electrode. Conclusion: Both auxiliary electrode and auxiliary airflow are two important factors affecting the spinning process. It can reduce the spinning voltage and improve spinning efficiency.
研究领域:
材料科学
·
生物工程
✓ 已验证
DOI
PubMed
高影响因子
PROGRESS IN POLYMER SCIENCE
·
2016
·
IF 27.184
Toby D. Brown,Paul D. Dalton,Dietmar W. Hutmacher
Over the last decade, melt electrospinning has emerged as an alternative polymer processing technology to alleviate concerns associated with solvents in traditional electrospinning. This has resulted in the fabrication of ultrafine fibers from an increasing range of synthetic polymers and composite systems , to materials including ceramics, driving new applications in technical areas such as textiles, filtration, environment and energy as well as biomedicine. In this article, we review the significant advancements in theoretical modeling of the underlying physical principles, coupled with experimental validation using a variety of technical devices and designs that allows well-controlled fiber formation using optimized material and operating parameters. Innovative device designs are indicating avenues towards higher throughput of randomly collected melt electrospun fibers for the production of commodity nonwoven substrates, similar to solution electrospinning and many other industrial fiber-forming processes. However, we identify a recent shift in perception towards melt electrospinning in the literature, where the adaptation of additive manufacturing approaches to device designs enables precise fiber placement with filament resolutions not yet demonstrated by more established melt-extrusion based direct writing technologies. New, highly ordered arrangements of ultrafine fibers with distinctive surface topology, encapsulating and sensing properties are opening new fields of application in areas such as drug delivery, biosensors and regenerative medicine as high performance materials. The development of these materials is reviewed with an emphasis on an area of current research, where melt electrospun scaffolds are contributing to promising treatment strategies to regenerate or replace human tissue and for the new field of in vitro disease models as well as humanized mice models.
研究领域:
材料科学
·
生物医学工程
·
纺织工程
·
再生医学
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产品关联
DOI
高影响因子
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
·
2017
·Vol. 65
·期 3
·323-327
·
IF 1.413
GuoQing Ying,MinJun Wang,Yu Yi,JianShu Chen,JianFeng Mei,YanLu Zhang,ShuQing Chen
An electrochemical biosensor that used an aptamer as a biological element was constructed to detect endotoxin. Biolayer interferometry was used to obtain the affinity constant of an aptamer for lipopolysaccharide, which had an equilibrium dissociation constant of 22.9 nM. The amine-terminated aptamer was then assembled on a gold electrode surface using 3-mercaptopropionic acid as an intermediate linker. The modification of the gold electrode was confirmed by cyclic voltammetry and electrochemical impedance spectroscopy. In the range of 0.001–1 EU/mL, the increase in electron transfer resistance of the biosensor was linear with the logarithmic value of the endotoxin concentration. The constructed biosensor exhibits sensitivity and a low limit of detection.
研究领域:
生物化学
·
分析化学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）