CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Hongping Tong,Zheng Xing,Yihan Wang,Zonglin Li,Shuangqing Li,Qingguo Zhang
The imidazolium ionic liquid is introduced into the traditional dual-network hydrogel via irregular aggregation. • The hydrogels exhibit high voltage windows and high sensitivity due to the synergistic effect. • The carbon-based hydrogel is applicable to wearable flexible electronic devices. The uneven dispersion of carbon particles restricts the mechanical properties and electrical conductivity of carbon-based nanomaterials, thus hindering their widespread application in wearable flexible electronic devices. Herein, imidazolium ionic liquids (ILs) in an irregularly aggregated form are perfectly incorporated into the polymer molecular chains of polyacrylamide/sodium alginate (PAM/SA) hydrogels. Interface and kinetic simulations clarify that the ionic liquid (IL) not only reinforces the hydrogel network structure, but also effectively improves the dispersion of graphite (KS-6), enhances the hydrogel's electrochemical performance, and endows the hydrogel with multiple excellent properties. The test results show that the composite PAM/SA carbon-based hydrogel achieves a wide voltage window (1.8 V ) and high sensitivity (GF = 7.03). Moreover, the hydrogel's mechanical properties (maximum elongation at break: 613.69%) and electrical conductivity (maximum value: 34.24 mS cm −1 ) are also significantly improved. Furthermore, the application value of this series of hydrogels in energy storage and sensing is demonstrated. For example, they can be used to fabricate flexible capacitors and as sensors to detect human joint movements and subtle vibrations. This research provides a feasible approach for the design of carbon-based hydrogels and an ideal set of candidate materials for the development of flexible electronic devices.
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Wenbo Sui,Yijing Chen,Yingnan Wang,Han Feng,Chunhong Zhang,Lei Su,Lei Shang
Commercial epoxy resins (EP) face key challenges such as flammability, brittleness, poor processability, and incompatibility, limiting their widespread use. This study presents the synthesis of phosphorus-based ionic liquid curing agents using n-Octyl phosphonic acid (OPA) and various imidazole derivatives through a supramolecular assembly strategy. The design of these curing agents aims to improve the flammability, brittleness, and processing performance of EP. The results show that ZMI, 1-ZMI, and B-ZMI, due to the inherent properties of ionic liquids, exhibit excellent compatibility with EP. Compared to EP/IM, EP/1-EIM, and EP/BIM, the mechanical and flame-retardant properties of EP/ZMI, EP/1-ZMI, and EP/B-ZMI are significantly enhanced, with all samples achieving UL-94 V-0 ratings. Additionally, the ionic bonds exhibit a “molecular switch” effect, extending the processing time of EP/ZMI, EP/1-ZMI, and EP/B-ZMI. Notably, EP/1-ZMI, where only the nitrogen at the 3-position of imidazole participates in the curing reaction, remained unchanged for 360 min at 60 °C, but rapidly gelled in just 4.5 min at 150 °C. This effect was not observed with other imidazole derivative curing agents with different substituents. In conclusion, all three curing agents effectively enhanced the mechanical and flame-retardant properties of EP, with 1-ZMI demonstrating superior processability. This approach offers a simple yet effective strategy for enhancing flame retardancy and toughness, with strong potential for industrial applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Chen Chen,Xinlu Li,Weixia Zhu,Yu Chen,Jie Tang,Shun Yao
This study aimed to develop a new suppository containing the complex of active pharmaceutical ingredient-ionic liquid (API-IL) and metal organic framework. As two famous drugs with anti-virus activities for the combination therapy of COVID-19, mefloquine (MQ) hydrochloride and artesunate (Art) were combined and then transformed to API-ILs to enhance therapeutic effects. The synthesized [MQ][Art] was characterized using melting point tests, Fourier transform infrared spectrum (FT-IR), proton nuclear magnetic resonance ( 1 H NMR), and mass spectroscopy (MS). Furthermore, [MQ][Art] exhibited improved water solubility, stability and pH values, which promoted treatment effectiveness while minimizing intestinal irritation during administration. Subsequently, [MQ][Art] was incorporated into Zeolitic imidazolate framework-8 (ZIF-8) to further enhance stability and achieve a controlled release effect. Combined with computational studies on interactive energy between ZIF-8 and API-IL, comprehensive characterizations confirmed the successful incorporation of [MQ][Art] on ZIF-8. The preparation method of suppositories was then investigated; among the 9 tested suppository bases, poloxamer-based suppositories demonstrated uniform quality with suitable hardness and melting time while also exhibiting a controlled release effect on [MQ][Art]. After 10 h of cumulative release rate testing reached 90 %. Finally, the poloxamer-based suppository containing [MQ][Art]@ZIF-8 showed good quality uniformity with an average drug content of 11.4 mg per suppository and an average displacement value of 2.59. Besides that, the in vivo release process was detected to demonstrate the effectiveness of the developed system. In conclusion, the combination of API-ILs with ZIF-8 in suppositories designed for COVID-19 treatment enhances therapy effectiveness by improving solubility and stability while also providing controlled release effects on MQ and Art.
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DESALINATION
·
2022
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IF 11.211
Yangyang Wang,Wenjing Duan,Rujie Li,Fan Zhang,Shichao Tian,Zhongqi Ren,Zhiyong Zhou
The novel heteropolyacid ionic liquid 1-methylimidazolium silicotungstate ([Mmim] 4 SiW 12 O 40 ) was synthesized using a one-step method and subsequently characterized. This compound was then employed as a co-extractant for the removal of lithium from salt lake brine having a high Mg/Li molar ratio , in conjunction with tributyl phosphate (TBP) and γ-heptanolide as the extractant and diluent, respectively. The optimal extraction conditions gave a single-stage lithium ion extraction efficiency of approximately 60 %. More environmentally friendly and efficient processes were also developed. In one approach, a portion of the aqueous phase containing only HCl and LiCl after stripping was used for washing along with an aqueous HCl solution as the stripping agent and Mg(OH) 2 for regeneration. In the alternative method, NaCl and LiCl were used as washing agents while Na 2 CO 3 was employed for stripping and regeneration, reducing the time required without the need for strong acids or bases. This system showed good extraction efficiency stability over 10 consecutive cycles. The mechanism of this process was explored using Fourier transform infrared spectroscopy and 31 P nuclear magnetic resonance spectroscopy and the binding capacity of TBP for the metals was found to decrease in the order of Li + > Na + > Mg 2+ > K + .
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 10
·4761-4774
·
IF 3.3
Fen Liu,Wenxuan Bai,Zhiping Gu,Jingcong Zhang,Jinxiang Chen,Jiang Yu
The acidic structure in an iron-based ionic liquid (Fe-IL) is significantly affected by the valent variation and solvent effect during the catalytic reaction. However, the magnetic property of Fe-IL limits the utilization of commonly used characterization methods that require a magnetic field for the structural analysis of Fe-IL. Herein, a quantitative pyridine-IR spectrum method was developed by analyzing the slope of straight lines (Slope(X)) in IA(X) ∼ n(Py) relationship graph (IA(X): integrated area of νPyH+ or νPy-L (cm−1); n(Py): the mole of added pyridine (mol)) to determine the structural forms of Brønsted and Lewis acid in Fe-IL, as well as the Lewis activity according to the Beer's law. Different Fe-IL systems, such as Fe-ILaq (from FeCl3·6H2O), Fe-ILnon-aq (from non-aqueous FeCl3) and Fe-ILnon-aq + HCl, were designed and synthesized with similar cationic and anionic structures, in which the Lewis acidity and Lewis activity are significantly influenced by Brønsted acidity. The results showed that the Brønsted acidity in Fe-ILnon-aq is lower than that in Fe-ILaq, and Fe-ILnon-aq can be transferred into Fe-ILaq after protonation. The Slope(L) of FeCl4− has the value of 0.21–0.28 in Fe-ILnon-aq and Fe-ILaq before protonation, and protonation could significantly decrease the value of Slope(L) and Lewis activity, which is mainly caused by the steric hindrance of FeCl4− with the increased amount of the Brønsted acidic structure of Fe–Cl–HCl. In addition, the solvent effect of polyethylene glycol dimethyl ether (NHD), which is a commonly used organic solvent for the absorption of an acidic gas, on the acidic structure and Lewis activity of Fe-IL was also investigated. We found that relatively free HCl that is combined with the Fe–Cl bond in the Fe-ILaq/NHD complex can be predicted by analyzing the slope of IA(X) ∼ n(Py), and the Lewis activity of FeCl4− decreases with increasing volume ratio of NHD. It is confirmed by density functional theory (DFT) calculation that the decreased Lewis activity of Fe-IL caused by the protonation and solvent effect is mainly attributed to the decreased electron-withdrawing ability of FeCl4− and the bond length of the Fe–Cl bond. Furthermore, DFT calculation and CV characterization further demonstrate the reliability of the developed quantitative pyridine-IR method by analyzing the slope of IA(X) ∼ n(Py).
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 6
·1302-1311
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IF 7
Hongbo Suo,Huining Geng,Lu Zhang,Guoyun liu,Hui Yan,Rui Cao,Jiahao Zhu,Yi Hu,Lili Xu
Enzymatic esterification plays an important role in the fields of chemistry and biotechnology. In this study, lipase was immobilized on an ionic liquid (IL)-modified magnetic metal–organic framework (MOF) and used to synthesize isoamyl acetate. The immobilized lipase (PPL-ILs/Fe3O4@MOF) showed 2.1-fold and 1.8-fold higher activity compared to the free and immobilized lipase without ILs (PPL-Fe3O4@MOF), respectively. In addition, the anti-denaturant ability and reusability of the PPL-ILs/Fe3O4@MOF were also higher than those of other samples. The ester yield reached 75.1% when the biocatalyst was used to synthesize isoamyl acetate in hexane. The synthesized supports supplied a good microenvironment for the immobilized lipase through multiple interactions. Results of the structural analysis showed that the conformation state of lipase molecules changed after immobilization. The magnetism of the prepared biocatalyst makes it easy to recycle so that PPL-ILs/Fe3O4@MOF maintained 70.2% of the initial activity after eight cycles. The prepared composite materials exhibited good potential in lipase immobilization with enhanced catalytic ability and stability.
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EUROPEAN POLYMER JOURNAL
·
2023
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IF 6
Jingjing Wang,Zhaoqi Pan,Jie Liu,Qun Shao,Yuan Liang,Shuohan Huang,Wenbin Jin,Zefeng Li,Zhenfei Zhang,Chunlin Ye,Yuwei Chen,Peng Wei,Yanping Wang,Yong He,Yumin Xia
In this study, a polymeric ionic liquid (PIL) called Poly[ECH-BIM]Cl was polymerized by ring-opening and quaternization reaction of benzimidazole and epichlorohydrin without additional ion-exchange reaction. Both 1 H NMR and fourier transform infrared (FTIR) confirmed the chemical structure of Poly[ECH-BIM]Cl. Poly[ECH-BIM]Cl in water was thermoresponsive and its UCST transition was studied by UV–vis spectrometry, dynamic light scattering (DLS) and scanning electron microscopy (SEM) at variable temperature. Moreover, the first introduced Temp-resistance behavior during ions pairing found Poly[ECH-BIM]Cl had properties similar to those of the precipitation of inorganic salts from their saturated solutions. The variable-temperature 1 H NMR analysis demonstrated that the tailored interchain π-π interactions promoted the aggregation of macromolecular chains and particles formed from Poly[ECH-BIM]Cl aqueous solution. The results showed that increasing the interaction between cations of PIL can endow its thermosensibility and the possibility of being a programmable shuttle.
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LANGMUIR
·
2022
·
IF 4.331
Yimin Hu,Yu Chen,Zixian Cai,Xiaolan Jin,Lei Fan,Jie Han,Rong Guo
The effect of the hydrocarbon chain length of ionic liquid surfactants 1-hexadecyl-3-alkyl imidazolium bromide [C16imCn]Br (n = 1–16) on their aggregation behavior with polyoxyethylene lauryl ether (Brij 30) in aqueous solution was inspected. The rheological behavior, thermal properties, and microstructures of the different samples were studied using freeze-fractured electron microscopy. The interactions between [C16imCn]Br and Brij 30 were studied using nuclear magnetic resonance spectroscopy and theoretical simulation. With the addition of Brij 30, the rodlike micelles of [C16imCn]Br (n = 1, 2, 4, and 6) transition into wormlike micelles. The effects of the molar ratio of Brij 30 and [C16imCn]Br and the hydrocarbon chain length of [C16imCn]Br on the Brij 30/[C16imCn]Br (n = 1, 2, 4, and 6) wormlike micelles were studied. When Brij 30 was mixed with the rodlike micelles of [C16imC8]Br, the Brij 30/[C16imC8]Br mixtures form wormlike micelles at low Brij 30 concentration and gels at high Brij 30 concentration. The [C16imCn]Br (n = 10, 12, 14, and 16) rodlike micelles were induced by Brij 30 to turn into the Brij 30/[C16imCn]Br gels. The effect of the [C16imCn]Br hydrocarbon chain length on their rodlike micelles with the addition of Brij 30 is also theoretically discussed.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Degong Yang,Liang Fang,Chunrong Yang
This study aimed to develop long-acting controlled release transdermal patches containing ionic liquids (ILs) of weak acid drugs and investigate effects of pressure sensitive adhesives (PSAs) on drug-ILs loading and release. Here, ketoprofen, flurbiprofen and loxoprofen were chosen as model drugs, and triethylamine was selected as model counterion. Three types of PSAs containing carboxyl (PSA-COOH), hydroxyl (PSA-OH) and non-functional group (PSA-none) were respectively synthesized. Microscopy results showed that the solubility of drug-ILs in PSA-COOH was enhanced up to 4.50 times compared with that in other PSAs. Drug release results showed that the average release percentage of drug-ILs in PSA-COOH (70.97%) had no significant difference with that in PSA-OH (73.22%) and PSA-none (73.47%). While drug skin penetration performances demonstrated that the average skin flux of drug-ILs in PSA-COOH (23.73 μg/(cm 2 h)) was much higher than that in PSA-OH (6.75 μg/(cm 2 h)) and PSA-none (4.32 μg/(cm 2 h)). As illustrated by FTIR, Raman and DSC analysis, ionic hydrogen bonding determined drug-ILs loadings, and interaction strength between drug-ILs and PSA-COOH was the strongest owing to the deprotonated PSA-COO – . Rheology study revealed that decreased storage modulus and increased phase shift angle of PSA-COOH determined drug-ILs release owing to strong plasticization at high drug-ILs loading. Remarkably, the long-acting controlled release patches were successfully developed and molecular mechanisms were revealed.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xiao-Xiao Xing,Hui-Li Guo,Tian-Meng He,Xin An,Hong-Ping Li,Wen-Shuai Zhu,Hua-Ming Li,Jing-Yu Pang,Dong-Bin Dang,Yan Bai
A new tungstovanadate K4[VW12O40]·21H2O has been prepared by a simple method first and then isolated as [C2(MIM)2]2VW12O40 (VW12-IL) by cation exchange (MIM = 1-methylimidazolium). The designed VW12-IL is employed as a catalyst in an extraction coupled oxidation desulfurization system, which could reach both 100% sulfur removal efficiency and sulfone product selectivity in 20 min with a high turnover frequency value (TOF: 53.2 h–1). Clean fuel and sulfone products are achieved simultaneously after the reaction, accompanied by the crystallization of the sulfone product at the interface of the two phases. In addition, the structure–activity relationship of a series of Keggin polyoxometalate-based ionic liquids (VW12-IL, PV3W9-IL, PVW11-IL, and PW12-IL) and the desulfurization mechanism were proposed by density functional theory and radical quenching, respectively. This work offers a novel perspective to design the structure of the polyoxometalate catalyst and the technological process of oxidative desulfurization.
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Analytical Methods
·
2021
·Vol. 14
·期 4
·401-409
·
IF 2.896
Yamei Han,Shan Wang,Yijie Liu,Ligai Bai,Hongyuan Yan,Haiyan Liu
Herein, a poly(ionic liquid@MOF) composite monolithic column was prepared via in situ radical polymerization using ionic liquid (1-allyl-3-methylimidazolium hexafluorophosphate) and MOF (derivatized UIO66-2COOH) as copolymer monomers. The composite monolithic column was characterized via scanning electron microscopy (SEM), nitrogen adsorption–desorption isotherms and mercury intrusion porosimetry. Subsequently, the composite monolithic column combined with high performance liquid chromatography (HPLC) was used as a solid-phase extraction (SPE) absorbent for online purification and enrichment of tectochrysin in medicinal plants. The results indicated that the addition of the ionic liquid and MOF not only increased the surface area but also increased the adsorption capacity of the monolith for tectochrysin. The method showed good linearity in the concentration range of 0.01–500 μg mL−1. The calibration equation was y = 2154.6x − 8.3785 and the limit of detection (LOD, S/N = 3) and the limit of quantification (LOQ, S/N = 10) were 3.33 ng mL−1 and 10 ng mL−1, respectively. The relative standard deviation (RSD) of the intra-day and inter-day precision was less than 2.62%, the RSD of inter-column was less than 3.16%, and the recoveries ranged from 100.58% to 105.00%. Thus, results showed that this method is simple, accurate and convenient for the online enrichment and purification of tectochrysin from medicinal plants.
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ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Chol-San Jon,Yilin Zou,Jinhua Zhao,Hyok-Chol Ri,Liyuan Wang,Han Yeong Kaw,Long-Yue Meng,Haibo Shang,Donghao Li
Phytohormones are interrelated by synergistic or antagonistic crosstalk and play important roles in the regulation of plant growth and development . In order to understand the interaction between phytohormones in the plant physiological network, it is necessary to determine trace levels of multiple phytohormones simultaneously in a complex matrix. Here, we synthesized ionic liquids containing different functional groups and modified the surface of carbon fibers with them. Based on these carbon fibers-ionic liquid (CFs-IL) materials, a solid phase microextraction method was developed to enable the simultaneous extraction of phytohormones. The adsorption specificity of multiple phytohormones was studied by identifying the hydrophobic, electrostatic, and π-π interactions, as well as hydrogen bonds , which favor simultaneous extraction of the relevant acidic, alkaline and neutral phytohormones by improving compatibility. The proposed method, coupled with liquid chromatography-tandem mass spectrometry, was applied to the simultaneous determination of 13 acidic, alkaline and neutral phytohormones in tomato. The limits of quantification were found to be in the range of 0.32–54.05 ng mL −1 and 4.6–185.8 pg mL −1 , respectively, when measured by QQQ and Q-TOF. All of the relative recoveries were in the range of 94.40–113.37% with RSDs ≤15.36% (n = 3) for spiked tomato samples. This method is expected to be widely applied to multiple phytohormones analysis for in-depth researches concerning the physiological networks of plants.
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危险品化学品经营许可证（带存储）