CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jiaqi Lou,Yimeng Yang,Chengji Zhao
Recent advancements in smart medical and artificial intelligence (AI) technologies have sparked growing interest in flexible electronic devices, particularly humidity sensors for wearable and bio-health monitoring applications. Ionic liquids have been widely reported as humidity sensitive materials for flexible humidity sensors due to their strong hydrophilicity and high ionic conductivity, However, they are hindered by slow response speed and poor stability in humid environments. In this study, POSS-based amphoteric ionic liquids were synthesized by acid catalysis, and they were then incorporated into the hydrophobic polyvinylidene fluoride (PVDF) matrix for addressing above challenges of ionic liquid-based sensor. The modified PVDF/POS-Prs-TFSI humidity sensor exhibits high linearity (R 2 = 0.95), high sensitivity (0.06), fast response/recovery (0.2/14.7 s), and low hysteresis within 11 %–97 % RH (6.1 % RH), along with excellent flexibility and resistance to gas interference. The enhanced humidity-sensing performance after modification is attributed to ionic-dipole interactions occurring between the -CF₃ groups in PVDF and the imidazolium groups within POS-Prs-TFSI. Based on its excellent performance and low-cost solution processing, this sensor can be integrated into masks and skin patches for scalable production. It meets the demand for economical, high-precision humidity monitoring in consumer electronics and healthcare, enabling applications in breath analysis, skin hydration, and sweat monitoring. Additionally, it extends to plant leaf humidity detection, showing strong market potential in smart wearables, telemedicine, and precision agriculture.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Xuehui Sun,Peijian Sun,Weili Xu,Quanping Yan,Xin Chen,Yipeng Wang,Changjian Wu,Lu Dong,Bin Peng,Jizhao Guo,Ying Zhu,Chaozhang Huang,Cong Nie
A series of amino acid-based ionic liquids (AAILs) have been synthesized by acid-base neutralization reaction of tetraalkylammonium hydroxides and amino acids. The pendent chain length and groups of AAILs were well adjusted by using glycine (Gly), L-alanine (L-Ala), L-valine (L-Val), L-leucine (L-Leu), L-Phenylalanine (L-Phe), L-glutamic acid (L-Glu) and L-lysine (L-Lys) as amino acid precursors. These AAILs was used for the effective removal of aldehydes in cigarette smoke, 41-66% of crotonaldehyde and 12-39% of acetaldehyde could be removed from the cigarette smoke with these AAILs as adsorbents. With the increasing of the pendent chain length, the remove efficiency of acetaldehyde and crotonaldehyde decreased from 32%, 66% to 16%, 41%, respectively due to the increase of steric hindrance. [N3333][Gly], the AAILs with the smallest chain length, has a highest removal efficiency of 66% for crotonaldehyde and 32% for acetaldehyde. The AAILs with pendent benzene groups, [N3333][Phe], has high crotonaldehyde removal efficiency of crotonaldehyde due to the strong π-π interaction, which could overcome the higher steric resistance of pendent chain. AAILs with pendent amino groups, [N3333][Lys], could reduce 60% of crotonaldehyde and 39% of acetaldehyde due to the enhanced chem-adsorption of the aldehydes by the pendent amino groups. Its excellent performance stems from the synergy between amino chemical adsorption and polar side chain solubility. The high aldehydes removal efficiency of these AAILs, such as [N3333][Gly], [N3333][Phe], [N3333][Lys], demonstrates the great potential of these AAILs as adsorbents for the removal of aldehydes in cigarette smoke.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenxuan Zhao,Ying Xu,Wenna Liu,Xiang Wang,Zhaoyou Zhu,Yinglong Wang,Peizhe Cui,Guoxuan Li
Imidazolium-based ionic liquids (ILs) were explored for the first time to capture C4 alcohol aldehyde isomer VOCs. The suitable IL was screened with viscosity, solubility, and selectivity as indicators by COSMO-SAC model. The absorption experiment showed that [BMIM][TFO] had excellent absorption capacity compared with [EMIM][TFO], and the average absorption rate was increased by 3.51 %. Quantum chemical analysis and molecular dynamics simulations have clarified the dual interaction mechanism of the process, that is, the cation binds to the alcohol/aldehyde through van der Waals force and hydrogen bond, while the anion interacts with the aldehyde through van der Waals force. The process simulation shows that using [BMIM][TFO] can reduce the amount of absorbent by 26.26 % compared with [EMIM][TFO] absorbent. This work provides a theoretical basis for the design and process optimization of C4 alcohol and aldehyde isomers VOCs capture absorbents and expands the application range of ILs in chemical waste gas treatment.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Zonglun Wang,Jiahui Feng,Jingping Liu,Fan Zhang,Liangbin Dou,Xianfa Zhang,Bo Wang,Xiujuan Liu,Yongle Ren,Yu wang
Amid escalating challenges of torque/drag and wellbore instability in deep shale gas development under high-temperature/high-salinity conditions, this study investigates three protic ionic liquids (PILs)—LTA1 (laurate), LTA2 (stearate), and LTA3 (oleate)—synthesized via proton transfer reactions to serve as eco-friendly lubricants for water-based drilling fluids. The molecular structures and thermal stability of the PILs were characterized using Fourier-transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, and thermogravimetric analysis (TGA). The lubricating properties of the PILs were comprehensively evaluated. Lubrication mechanisms were elucidated by contact resistance analysis, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. Results demonstrated that at a 0.5 wt% dosage, all three PILs achieved a lubrication coefficient reduction rate exceeding 90 %. After aging at 210°C, the lubricity coefficients of all PILs remained below 0.05, demonstrating excellent thermal stability. Meanwhile, LTA3 exhibited outstanding salt-resistant and corrosion inhibition performance. This superior lubricating performance is attributed to the unique capability of PILs to form a dual protective film at the interface. Specifically, an adsorbed film is first formed on the metal surface through electrostatic interactions and the adsorption of polar groups, whereas a tribochemical film is generated in situ during the friction process. The synergistic action of these two films effectively physically separates the friction pairs, thereby reducing the shear stress at the interface. These PILs thus enable sustainable WBDFs for deep shale gas, eliminate hazardous additives, and resolve torque/drag issues in extended-reach wells.
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Soft Matter
·
2025
·
IF 2.8
Manas Kumar Mandal,Shujiao Chen,Shuai Zhang,Qunhui Yuan,Wei Gan
Biocompatible and bioavailable ionic liquids (ILs) are generally used to modify the physicochemical properties of lipid monolayers and bilayers. Understanding the influence of ILs on lipid properties and the molecular level mechanism is crucial for applying ILs in lipid membrane modifications. Here the modification of a lipid membrane composed of 1,2-dioleoyl-sn-glycero-3-phosphoglycerol (DOPG) and cholesterol using alkyl methyl imidazolium-based ILs [Cnmim]Cl with varied alkyl chains (n = 4, 6, 8 and 10) was investigated. Langmuir monolayers were used to evaluate the influence of the ILs on the rigidity and robustness of the membranes. Then, selected compositions were used to prepare small unilamellar vesicles (SUVs) as nanocarriers. A small amphiphilic molecule (4-(4-diethylaminostyry)-1-methyl-pyridinium iodide, D289) was used as a probe to investigate the loading capability and encapsulation efficiency of the SUVs. The permeability of the lipid membrane to small molecules was also evaluated using second harmonic generation spectroscopy analysis. The different effects of the ILs with increasing chain length imposed on the membranes were compared and analyzed.
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PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
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IF 3.858
Song Xue,Siru Ren,Li Wang,Qi Zhang
The application of chiral ionic liquids (ILs) in capillary electrophoresis (CE) for enantioseparation has received considerable attention in the past few years; however, the use of chiral ILs as ligands in ligand-exchange capillary electrophoresis (LE-CE) has been reported only in a few papers. In this work, several tetraalkylammonium amino acid ILs (TAA-AAILs) including tetramethylammonium- l -arginine (TMA- l -Arg), tetramethylammonium- l -proline (TMA- l -Pro) and tetramethylammonium- l -glutamic acid (TMA- l -Glu) were first applied in LE-CE to act as chiral ligands for enantioseparation. The results show that TMA- l -Arg-is an excellent chiral ligand, and able to yield equal or even better resolutions (Rs) in much shorter migration times for most tested analytes compared with previously reported AAILs ligands or free l -Arg-ligand. Parameters of the new TAA-AAILs-based LE-CE system such as the alkane chain length of TAA-AAILs, ILs configuration, ILs concentration, the type and concentration of central metal ion, buffer pH and applied voltage were optimized. Satisfactory enantioseparations were achieved for most selected free- or dansyl-amino acids. The method was then successfully applied to the enantiomeric impurity test of a commercial amino acid sample. This work indicates that the application of TAA-AAILs as chiral ligands in LE-CE is of great potential for enantioseparation.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Siyu Han,Shiyan Tian,Bai Wang,Yongxin Shang,Jie Ren,Jianshe Hu,Liqun Yang
The complex scenarios and harsh conditions encountered during firefighting missions impose higher demands on functional materials. Polymer ionic liquid (PIL) gels exhibit significant potential for application in extreme environments due to their outstanding performance characteristics. This study synthesizes a novel carboxyl-functionalized PIL composite gel using a green ultraviolet cross-linking method, optimizing its molecular design to enhance the hydrogen bond network significantly. This optimization results in improved mechanical strength, adhesion, and self-healing capabilities. The multi-network structure ensures the stability of the material, while uniformly dispersed fluorophosphate imidazolium compounds confer excellent flame retardancy (limiting oxygen index LOI = 43 %) and antibacterial efficacy (>98 %), making it suitable for extreme firefighting conditions. Thanks to its unique temperature and strain response characteristics, this composite gel can establish a multifunctional sensing platform, enabling real-time monitoring, motion tracking, electrocardiogram (ECG) and electromyogram (EMG) signal acquisition, and wearable device control. Notably, the resistance variation rates of PIL ionic gels with different thicknesses show significant differences, deepening the understanding of the relationship between the microstructure of ionic gels and their electrical transport properties. Finite element analysis supports the material's hydrogen bonding mechanisms, adhesion principles, and sensing mechanisms. This gel material integrates structural stability, self-adhesion, antibacterial properties, and flame resistance, providing innovative solutions for emergency rescue and smart sensing technologies, thereby significantly enhancing the safety and operational efficiency of firefighters.
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高影响因子
FUEL
·
2025
·
IF 7.5
Menglong Niu,Jiabin Zheng,Yuhang Fang,Ben Niu,Zheng Fan,Xiaogang Shi
The feasibility of effectively oxidizing polycyclic aromatic hydrocarbons (PAHs) in coal tar (CT) to high-value products using five traditional oxidants and the ionic liquid [Et 3 NH] [HSO 4 ] was investigated, and relevant methods were established. The results showed that the oxidation effects of the six oxidants on CT were different. In terms of the yield of target products and the ease of separation, [Et 3 NH][HSO 4 ] performed the best, with a target product yield of 18.72%. Based on the experimental results, several oxidation products were characterized, and the area of characteristic functional groups increased by 200% after oxidation, with the area of characteristic carbon signals accounting for 10%. Further kinetic analysis indicated that the oxidation of PAHs in CT does not conform to first-order kinetics, and its oxidation rate is mainly determined by reaction temperature, time, and the concentration of IL. Moreover, the results showed that there is a maximum yield of target products in the oxidation of CT by IL.
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Separations
·
2025
·Vol. 12
·期 2
·29
·
IF 2.7
Dan Li,Yuxin Qin,Jingxing Li,Subhan Mahmood,Jianqin Shi,Yu Cao,Shun Yao
As a kind of bioactive component in the rhizome of natural plantCurcuma longaL. (turmeric), curcumin is almost insoluble in water at neutral and acidic pH, which limits its further utilization and development. At the same time, traditional extraction and separation processes typically require the use of a large number of organic solvents. Ionic liquids (ILs) are organic molten salts with melting points below 100 °C. When an ionic liquid exists in a liquid state at or near room temperature, it is referred to as a room-temperature ionic liquid (RTIL). They have a temperature range, good physical and chemical stability, and good structural designability. They have a strong solubilization enhancement effect for many organic compounds. This study first explored the molecular forms of curcumin in ionic liquid aqueous solutions and the intermolecular interactions between curcumin and ionic liquids using spectral analysis and computational chemistry methods; furthermore, using an ionic liquid aqueous solution as an extraction agent, curcumin-like substances (curcuminoids) were extracted from turmeric powders under ultrasound assisted conditions, revealing the relationship between the structure of the ionic liquid and the extraction efficiency. After that, a kinetic study was conducted for the extraction of curcuminoids from turmeric powders, using second-order kinetics fitting to obtain the rate constant and initial extraction rate during the extraction process. Finally, the comparison with a ComplexGAPI tool and antioxidant experiment was performed on the extraction by using ionic liquids and traditional solvent. The full results can provide reference for the design of IL extractants and their application for natural products.
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CHEMICAL ENGINEERING & TECHNOLOGY
·
2022
·Vol. 45
·期 12
·2234-2244
·
IF 2.215
Pei Yao,Shiqi Du,Yihan Zhang,Wenfu Li,Entian Li
Amino ahcid ionic liquids were prepared and loaded onto manganese dioxide for fuel desulfurization. The optimum desulfurization process conditions of the loaded amino acid ionic liquids were obtained experimentally and by response surface methodology. The excellent regeneration and recycling performance of the loaded amino acid ionic liquids was confirmed by reusability experiments. The equilibrium experimental data fit the Langmuir isotherm well, and a pseudo-second-order kinetic model can be used to describe the adsorption kinetics of dibenzothiophene adsorption. The research results of the desulfurization mechanism show that the adsorption of thiophenes by the loaded amino acid ionic liquids is chemical adsorption.
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高影响因子
CARBOHYDRATE POLYMERS
·
2018
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IF 5.158
Xiang Li,Qinqin Xu,Hongwei Shen,Yuanlong Guo,Mouyi Wu,Ya Peng,Lihua Zhang,Zongbao Kent Zhao,Yu Liu,Haibo Xie
To overcome the natural recalcitrance of cellulose for glucose production in aqueous media catalyzed by enzyme, in this study, a dissolution pretreatment strategy was developed by using in situ formed CO 2 -based reversible ionic compounds (RICs)/DMSO mixed organic electrolytes under mild conditions. The influences of the constitution of RICs, CO 2 pressure, dissolution pretreatment time on the physic-chemical structure of cellulose were investigated systematically by FTIR, XRD, SEM, AFM towards in-depth understanding of the correlations between the pretreatment conditions, micro-scale structure and enzymatic saccharification of cellulose. The results showed that the tetramethyl guanidine (TMG) based RICs solvent system [TMGH] 2 + [O 2 COCH 2 CH 2 OCO 2 ] 2− /DMSO (X RICs = 0.1, X RICs : the mole fraction of the formed RICs in the mixture) presented the best performance, which was evidenced by 100% glucose yield after the dissolution-regeneration pretreatment strategy under mild conditions (T = 60 °C, Pco 2 = 2.0 MPa, t = 2 h). Furthermore, the solvent system have good recyclability and usability.
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高影响因子
World Journal of Engineering
·
2014
·Vol. 11
·期 3
·271-278
·
IF 0
Leqin He,Jiquan Zhao,Shenjun Qin,Tao Chang,Yuecheng Zhang,Guangqing Zhang,Xiaorui Gao
Five halogen-free amphiphilic Brønsted acidic ionic liquids (ILs) based on 3-(N,N-dimethylalkylammonium)-propanesulphonate quaternary ammonium zwitterions andp-toluene sulphonic acid monohydrate were synthesized. The IL structures were characterized using1H NMR,13C NMR and (ESI)-MS. The IL thermal instability was characterized using TG-DSC. The ILs were used as dual-solvent catalysts for esterification of several carboxylic acids, with different alcohols under mild conditions to study relevant structure-activity relationships. Results showed that the miscibility of the acidic IL, which is affected by the length of the carbon chain in the cation, is an important factor influencing the activity of the catalyst for the esterification reaction. Post-processing steps were simple, and the catalyst could be reused easily.
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危险品化学品经营许可证（带存储）