MACROMOLECULES
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2022
·
IF 6.057
Jiangli Li,Shengqi Ji,Xiaoliang Yu,Xiaoyan Yuan,Ke Zhang,Lixia Ren
Magnetic poly(ionic liquid)s (MPILs) with FeCl4– as counterions show phase transition from paramagnetism to ferromagnetism by introducing strong π–π stacking groups. The neighboring Fe(III)–Fe(III) distance and the ordering degree of magnetic ions are crucial for the phase transition. In this work, linear and bottlebrush magnetic polymers are synthesized to study the effect of topological structure on the magnetic property of MPILs. Magnetic studies show that the bottlebrush MPILs are ferromagnetic at low temperature while the linear analogue is paramagnetic. With increasing of the grafting ratio, the phase transition temperature from paramagnetism to ferromagnetism is increased. Compared with linear structure, the bottlebrush polymers show high ordering and crowding of the side chains which are favorable to the ferromagnetic phase transition.
研究领域:
材料科学
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磁性材料
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高分子化学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Min Li,Ying Li
In this work, it found that lead oxide (PbO) can be dissolved well in 1-methylimidazolium trifluoromethylsulfonate (MIMTfO) ionic liquid. The electrodeposition of lead from PbO in MIMTfO ionic liquid was studied. Cyclic voltammetry studies showed that the reduction of Pb(II) is a irreversible and one-step reaction process. Chronoamperometry results presented that the nucleation mechanism of lead is fit instantaneous nucleation under diffusion control. The diffusion coefficient of Pb(II) at 373 K is approximately 3.6×10 –8 cm 2 s –1 . The electrodeposition experiments were conducted at 383 K and 393 K using potentiostatic electrolysis. A compact electrodeposit was obtained at 383 K in MIMTfO ionic liquid, which was confirmed to be metallic lead.
研究领域:
化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Gels
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2025
·Vol. 11
·期 6
·436
·
IF 5.3
Lei Wang,Jie Liu,Meng Zong,Yi Liu,Jianfeng Zhu
In the past, powder-like microwave absorbers have made notable breakthroughs in performance enhancements, but complicated processes and undesirable properties have limited their practical application. Herein, a novel poly(ionic liquid) (PIL)-based ionic gel with excellent microwave absorption properties was prepared via a facile UV-initiated polymerization method. By simply adjusting the mole ratio of the polymerizable ionic liquid (IL)monomer and the IL dispersion medium, the microwave absorption properties of the obtained ionic gels can be tuned. A maximum reflection loss (RLmax) of −45.7 dB and an effective absorption bandwidth (EAB) of 8.08 GHz were achieved, which was mainly ascribed to high ionic conduction loss induced by the high content of the dispersion medium. Furthermore, it displayed recyclable, adhesive, and self-healing properties, thus providing a new candidate for developing efficient microwave absorbers for practical applications.
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DOI
PubMed
高影响因子
IONICS
·
2024
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IF 2.4
Qiao Wenli,Zhang Zhen,Tang Xiying,Chang Mengjun,Guo Le,Liu Xinsheng,Li Yonghong
Helicobacter pylori ( H. pylori ) can cause a variety of gastric diseases, such as chronic gastritis, gastric ulcer, intestinal metaplasia, and dysplasia, and eventually lead to gastric cancer. Therefore, it is crucial to achieve early diagnosis of H. pylori . The biosensing platform was constructed for Epitope Vaccine against Four Virulence Proteins from H. pylori (FVpE) based on chitosan (CS)@ionic liquid (IL) and graphitic carbon nitride (g-C 3 N 4 ) modified glassy carbon microspheres ionic liquid paste electrode. The results showed that the substrate electrode had good electrical conductivity, which could amplify the response signal and improve the detection sensitivity. The developed immunosensor exhibited good immunoreactivity for H. pylori antibodies with wide linear range (0.05–5 ng mL −1 ) and low detection limit (0.01 ng mL −1 ). In addition, the electrochemical immunosensor presented quick response, high sensitivity, good specificity, and stability. The immunosensor could be used to detect H. pylori in serum samples with recoveries between 99 and 112%. It can provide a theoretical basis for the development of label-free electrochemical H. pylori immunosensors.
研究领域:
医学诊断
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生物传感技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yanfei Wu,Zhuanhong Jia,Chunmiao Bo,Xiaojun Dai
In this study, we successfully prepared two magnetic graphene oxide composites, specifically (mGO @ ILs(1)-βCD and mGO @ ILs(2)-βCD), with different ionic liquid functional group substitution contents on the β-cyclodextrin (β-CD). Structural characterization of the composite material was performed using Fourier transform infrared spectroscopy , X-ray diffraction, field emission scanning electron microscopy , specific surface area and pore volume measurements. Comparison of the adsorption performance of the two materials for anionic dyes (lemon yellow (LY), sunset yellow (SY), and ponceau 4R (P4R)) in simulated wastewater. Effect of initial pH value, contact time were studied and discussed in terms of affinity and adsorption efficiency. The adsorption of the anionic azo dye by two adsorbent followed Langmuir adsorption isotherm models and pseudo-second-order kinetics. Noticeably, the maximum adsorption capacity based on the Langmuir model showed that mGO @ ILs(2)-βCD was better than mGO @ ILs(1)-βCD. Additionally, the adsorbent maintains excellent adsorption capacity after five cycles of adsorption-desorption and has remarkable selective separability. The results showed that the high-density substitution content of the ionic liquid functional groups on β-cyclodextrin in mGO @ ILs(2)-βCD is helpful to improve the adsorption capacity and efficiency.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
TALANTA
·
2016
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IF 4.035
Zhongling Liu,Wei Yu,Hanqi Zhang,Fanbin Gu,Xiangqun Jin
Salting-out homogenous extraction followed by ionic liquid/ionic liquid dispersive liquid-liquid micro-extraction system was developed and applied to the extraction of sulfonamides in blood. High-performance liquid chromatography was applied to the determination of the analytes. The blood sample was centrifuged to obtain the serum. After the proteins in the serum were removed in the presence of acetonitrile , ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, dipotassium hydrogen phosphate , ionic liquid 1-Hexyl-3-methylimidazolium hexafluorophosphate were added into the resulting solution. After the resulting mixture was ultrasonically shaken and centrifuged, the precipitate was separated. The acetonitrile was added in the precipitate and the analytes were extracted into the acetonitrile phase. The parameters affecting the extraction efficiency, such as volume of ionic liquid, amount of dipotassium hydrogen phosphate , volume of dispersant , extraction time and temperature were investigated. The limits of detection of sulfamethizole (STZ), sulfachlorpyridazine (SCP), sulfamethoxazole (SMX) and Sulfisoxazole (SSZ) were 4.78, 3.99, 5.21 and 3.77 μg L −1 , respectively. When the present method was applied to the analysis of real blood samples, the recoveries of analytes ranged from 90.0% to 113.0% and relative standard deviations were lower than 7.2%.
研究领域:
分析化学
·
药理学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xue Xing,Fuyun Yang,Yuying Yang,Guodong Yang,Xiao Xiao,Hongyu Chen,Xueyang Liu
In the field of ionic-liquid-based electrochemical gas sensors, the high viscosity of ionic liquids leads to slow mass transfer, restricting sensor performance. In this study, microstirbars with tunable sizes were fabricated via wet spinning. Using fluorescent dye as a tracer, these microstirbars homogeneously dispersed the dye in a droplet of ionic liquid within 2 min, nearly 200 times faster than the control group without stirring. When using ferrocene as a model reactant in chronoamperometry, the microstirbars enhanced the mass transfer process and the best stirring conditions (400 rpm, 8.0 wt %, l = 300 μm) were determined. When these optimized conditions were applied to oxygen detection, the results showed that the sensor sensitivity reached 0.63 μA·%–1, on par with the best performing gas sensors in the literature and 6 times higher than the control group without stirring. The stirred sensor achieved T90 of 7.0 s for 6.7% O2, three times faster than that of the control group without stirring (21 s). This study presents a straightforward approach to addressing the mass transfer challenges in ionic liquids, serving as a viable alternative to the complex designs of electrochemical sensors. As an approach to enhance mass transfer in microdroplets, we believe that the microstirring strategy is not limited to gas sensors. With advances in miniaturization of electromagnetic devices, it holds promise for a variety of sensing schemes.
研究领域:
电化学
·
传感器与传感技术
·
微流控
·
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Lin Yu,Jingyuan Liu,Wenyan Yin,Jing Yu,Rongrong Chen,Dalei Song,Qi Liu,Rumin Li,Jun Wang
Ionic liquids are promising electrolytes for electrochemical gas sensors that have unique physicochemical properties such as negligible vapor pressure and high thermal stability. The modification of ionic liquid (IL) by combining metal oxide with reduced graphene oxide (rGO) is an effective method to improve its gas-sensing properties. In this study, the mesoporous structure of NiCo 2 O 4 /rGO is synthesized by simple one-step method, and the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]) is mixed with it to form the composite material NiCo 2 O 4 /rGO/[BMIM][PF 6 ]. Electrochemical test results indicate that the three electrolytes exhibit response current and long-term stability in the oxygen environment. The oxygen sensor based on NiCo 2 O 4 /rGO/[BMIM][PF 6 ] significantly improves the response current and working stability of pure ionic liquid. The sensitivity of the sensor is 0.1087 μA/[%O 2 ], and the linear regression coefficient of the reduction peak current calibration curve is 0.9995. After continuous cyclic voltammetry , the reduction peak current remains at 90% of the initial current value. The interaction of IL and NiCo 2 O 4 /rGO significantly enhances electrochemical oxygen sensing performance.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
LANGMUIR
·
2019
·
IF 3.683
Xiaojiang Li,Baogang Wang,Shanshan Dai,Hongsheng Lu,Zhiyu Huang
CO2-responsive microemulsions based on ionic liquid 1,1,3,3-tetramethylguanidine-oleic acid (TMG-OA) have been designed to provide an approach for reducing the volatilization of amine in amine-containing microemulsions effectively and exhibit reversible transitions of microstructures. The ionic liquid TMG-OA was prepared by the direct neutralization of oleic acid (HOA) and 1,1,3,3-tetramethylguanidine (TMG, one of volatile and toxic amines). From the investigations of nuclear magnetic resonance hydrogen spectrum, pH, thermogravimetry, and automatic interface tension meter, the excellent properties of switchability, stability, and surface activity of TMG-OA were demonstrated, and then the ionic liquid-based microemulsions with CO2 response were prepared with TMG-OA (surfactant), HOA (oil phase), isopropyl alcohol (IPA, cosurfactant), and water. Interestingly, for microemulsions with a higher IPA content (47.42, 44.48 wt %), sizes of microemulsions are increased upon introducing CO2 and decreased upon addition of N2/65 °C. In addition, for microemulsions with a lower IPA content (26.22 wt %), the new microemulsions with different sizes are regenerated after the phase separation of emulsions generated by introducing CO2, and incomplete recovery of microemulsions can be observed upon addition of N2/65 °C. The reversible microstructures are induced by the swelling behavior and the reduced single phase area, which are caused by the reversible conversion between TMG-OA and HOA components.
研究领域:
化学
·
材料科学
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Xi Chen,Xiaojun Liu,Congcong Miao,Pengfei Song,Yubing Xiong
Inimer bears a polymerizable vinyl group and a reactable group, and thus has great potentials in the synthesis of branched and functional polymers. Herein, a strategy was developed for the synthesis of ionic liquid (IL)-like inimer containing a trithiocarbonate moiety and a styryl group. The newly-developed IL-like inimer could be facilely achieved via the neutralization reaction using a carboxyl-contained chain transfer agent (CTA) and an alkaline IL monomer. The IL-like inimer was characterized through proton and carbon nuclear magnetic resonance spectroscopy ( 1 H and 13 C NMR), Flourier transform infrared spectroscopy (FT-IR) and Mass spectroscopy. Moreover, the reversible addition-fragmentation chain transfer (RAFT) polymerization of N-isopropylacrylamide (NIPAM) mediated by the as-prepared IL-like inimer was investigated. The results revealed that branched PNIPAM with tunable molecular weight and degree of branching (DB) could be prepared. Additionally, lower critical solution temperature (LCST) of branched PNIPAM could be adjusted through the feed ratio of IL-like inimer and the monomer in the polymerization process. As a result, our study offers a new technique for the design of functional inimer, as well as broadens the application of ILs in the polymer field.
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2014
·
IF 5.039
Xin Zhang,Suojiang Zhang,Di Bao,Ying Huang,Xiangping Zhang
For biogas upgrading, present work mainly focuses on either thermodynamics or mass transfer properties. A systematical study on these two aspects is important for developing a new biogas separation process. In this work, a new criterion “absorption degree”, which combines both thermodynamics and mass transfer properties, was proposed for the first time to comprehensively evaluate the absorption performance. Henry’s law constants of CO 2 and CH 4 in ionic liquids–polyethylene glycol dimethyl ethers mixtures were investigated. The liquid-side mass transfer coefficients ( k L ) were determined. The results indicate that IL–NHD mixtures exhibit not only a high CO 2 /CH 4 selectivity, but also a fast k L for CO 2 absorption. The [bmim][NO 3 ] + NHD mixtures present a high absorption degree value for CO 2 but a low value for CH 4 . For presenting a highest relative absorption degree value, the 50 wt% [bmim][NO 3 ] + 50 wt% NHD mixture is recommended for biogas upgrading.
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2015
·
IF 3
Yinghao Min,Yanmei Zhou,Min Zhang,Han Qiao,Qi Huang,Tongsen Ma
The removal of ionic liquid (1-butyl-3-methyl imidazolium chloride: BMImCl) was studied from aqueous solution by raw bentonite, acid-activated bentonite and organic-modified bentonite. These types of bentonite sample were characterized by FT-IR, TGA and XRD. The effects of contact time, BMImCl initial concentration, pH, ionic strength, and humic acid on the removal of BMImCl were investigated via batch adsorption experiments. The adsorption kinetics models were applied to predict the adsorption constants, and the kinetic data indicated that the pseudo-second-order model gave a better fit. Furthermore, the Langmuir, Freundlich and Temkin isotherms models were also introduced to describe adsorption process in order to obtain possible mechanism of the removal. The applied isotherms models demonstrated that the adsorption data of acid-activated bentonite samples were well described by Temkin adsorption isotherm, and the isotherm model of organic-modified bentonite was Langmuir adsorption isotherm. The adsorption experiments indicated that these bentonite samples might be applied in repair of soil and water contaminated by ionic liquids.
研究领域:
环境科学
·
土壤修复
·
水污染治理
·
吸附材料
·
环境功能材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）