Journal of Chemistry
·
2018
·
IF 1.726
Yinke Zhang,Hang Xu,Mengfan Jia,Zhuang Liu,Deqiang Qu
Response surface methodology (RSM) was selected to optimize a desulfurization process with metal based ionic liquids ([Bmim]Cl/CoCl2) and potassium monopersulfate (PMS) together to remove benzothiophene (BT) from octane (simulating oil). The four experimental conditions of PMS dosage, [Bmim]Cl/CoCl2 dosage, temperature, and reaction time were investigated. The results showed that the quadratic relationship was built up between BT removal and four experimental variables with 0.9898 fitting coefficient. The optimal conditions were 1.6 g (20 wt%) PMS solution, 3.2 g [Bmim]Cl/CoCl2, 46°C, and 23 min, which were obtained based on RSM and experimental results. Under the optimal condition, predicted sulfur removal rate and experimental sulfur removal rate were 96.7% and 95.4%, respectively. The sequence of four experimental conditions on desulfurization followed the order temperature > time > [Bmim]Cl/CoCl2 dosage > PMS solution dosage.
研究领域:
化学工程
·
环境科学
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DOI
高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Heng Zhang,Wenfang Feng,Zhibin Zhou,Jin Nie
A new polymeric ionic liquid (PIL), poly(1-vinyl-3-methylimidazolium) bis(fluorosulfonyl)imide (PVyMIM-FSI), has been prepared by polymerization of the monomer of ionic liquids, 1-vinyl-3-methylimidazolium bis(fluorosulfonyl)imide (VyMIM-FSI). Its structure and composition have been characterized by 1 H and 19 F NMR, and viscosity-average molecular weight ( M v ). For comparison, the corresponding PIL, poly(1-vinyl-3-methylimidazolium) bis(trifluoromethanesulfonyl)imide (PVyMIM-TFSI), is also prepared and characterized. The physicochemical properties of the binary composite electrolytes of lithium bis(fluorosulfonyl)imide (LiFSI)/PVyMIM-FSI with various concentrations of LiFSI have been comparatively studied with those of the corresponding lithium bis(trifluoromethylsulfonyl)imide (LiTFSI)/PVyMIM-TFSI system, in terms of DSC , TGA , ionic conductivity , and lithium ion transference number ( t Li + ). Both the FSI − - and TFSI − -based PILs are thermally stable up to 250 °C. While both types of the prepared PILs show a significant decrease in glass transition temperature ( T g ) upon addition of lithium salt, the values of T g for the composite electrolytes of LiFSI/PVyMIM-FSI are all significantly lower by 20–60 °C in magnitude than those of the corresponding LiTFSI/PVyMIM-TFSI composite ones, indicating much better plasticizing effect for FSI − vs. TFSI − . The ionic conductivities of LiFSI/PVyMIM-FSI are all higher by about 2 orders in magnitude than those of the corresponding LiTFSI/PVyMIM-TFSI with the same concentration of lithium ions.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 4
·1215-1223
·
IF 3.186
Wang Yun,Cheng Hong,He Jia-Rui,Yao Qiao-Xia,Li Li-Ling,Liang Zhi-Hui,Li Xiang
The Knoevenagel condensation of acetylacetone and aromatic aldehyde catalyzed by lipase from porcine pancreas(PPL) and α-amylase from hog pancreas in ionic liquids and deep eutectic solvents was achieved for the first time. The highest yields is up to 96.1%. Mild reaction conditions, enhanced rates, improved yields and reagents’ reactivity which is different from that in standard organic solvents are the remarkable features observed in ionic liquids and deep eutectic solvents. Graphical Abstract
研究领域:
生物化学
·
有机化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 3
·1044-1050
·
IF 7.059
Bo Li,Lei Kan,Chao Li,Wei Li,Yihan Zhang,Rui Li,Hao Wei,Xinyue Zhang,Ning Ma
There is a challenge to prepare a hydrogel devoted to fabricate a form of multi-responsive skin-like sensors piggybacking on tactile controlled robots, which could grab the soft and fragile items at subzero temperatures. Herein, we demonstrate a supramolecular ionic liquid hydrogel wherein ureidopyrimidinone (UPy) containing hydrophilic polyurethane (PU) was employed as the network while the aqueous solution of imidazolium ionic liquid acted as a free phase. Combining the advantages of hydrophilic PEG segments, hydrophobic UPy moieties, and the imidazolium ionic liquid, this supramolecular hydrogel exhibited high water content (∼86%), swelling ratio (∼400%), elongation (∼750%), low resistivity (∼0.51 kΩ cm) and excellent transparency (∼98%). Moreover, the most striking characteristic was that the supramolecular hydrogel maintained its outstanding mechanical and thermal sensitivity at subzero temperatures, e.g., −20 °C. The supramolecular ionic liquid hydrogel was utilized to fabricate E-skin for the intelligent robot to realize pressure feedback and thermal recognition. This line of research not only demonstrates that anti-freezing stimuli-responsive hydrogels are a promising candidate for E-skins used in harsh conditions, but also contribute to the design and application of supramolecular polymer-based hydrogel sensors for future artificial intelligence applications.
研究领域:
材料科学
·
机器人技术
·
生物医学工程
·
化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoqing Ming,Changgeng Zhang,Junjie Cai,He Zhu,Qi Zhang,Shiping Zhu
The rapid development of soft electronics has revitalized the research of conducting elastomers. However, the design of conducting elastomers having high stretchability and good transparency still remains a considerable challenge. In this study, we develop a highly transparent, stretchable, and conducting ionoelastomer based on a poly(ionic liquid) in which cations are fixed to a stretchable elastomeric network and counter anions are mobile. The ionoelastomer solves the dilemma of simultaneous transparency and stretchability in the design of traditional conducting elastomers, possessing good transparency (96%) with an extraordinarily high stretchability, up to a limiting strain of 1460%. Moreover, this novel material is completely nonvolatile and nonhygroscopic, endowing the ionoelastomer with highly stable thermal, environmental, electrochemical, and mechanoelectrical properties. An underwater sensor based on the ionoelastomer is developed with good performance in an aqueous environment. Also, a transparent dielectric elastomer actuator (DEA) is demonstrated using the ionoelastomer. It is believed that the ionoelastomer would pave the way to develop exceptional conducting elastomers toward next-generation soft electronics.
研究领域:
材料科学
·
软电子技术
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xinyi Wan,Ting Wan,Chaochao Cao,Chengchun Tang,Yanming Xue,Youguo Yan,Zhen Li,Zhizhen Ye,Xinsheng Peng
The development of highly effective and durable CO 2 separation membrane is still a challenge for the carbon capture and storage. Herein, a novel BN nanosheets supported magnetic ionic liquid membrane (BN-SMILM) is constructed by nanoconfining magnetic ionic liquid (MIL) [P 6,6,6,14 ][FeCl 4 ] to the two-dimentional (2D) nanochannels of laminated BN membrane. The 2D nanochannels provide a well support and restricted space for the MIL. The nanoconfinement effect makes the magnetic [FeCl 4 ] - anions align along the center of 2D BN nanochannels, leading to selectively accelerate the CO 2 transport. The nanoconfinement effect and CO 2 separation mechanism are further explicated by the molecular dynamic simulations. As a result, compared with the polymer supported MIL membrane, the as-prepared BN-SMILM exhibits better CO 2 separation performance, with CO 2 permeability of about 227 Barrer and CO 2 /N 2 selectivity of 90 that is above the 2008 Robeson upper-bound. The BN-SMILM also presents excellent long-term stability after 7 days operation, revealing the promising applications in CO 2 separation. This work provides a new strategy to prepare high-performance supported liquid membrane materials towards practical environmental and energy application.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 121
·99927-99934
·
IF 3.84
Chao Wang,Wenshuai Zhu,Zhigang Chen,Sheng Yin,Peiwen Wu,Suhang Xun,Wei Jiang,Ming Zhang,Huaming Li
An aerobic oxidative deep-desulfurization process for aromatic sulfides, such as dibenzothiophene (DBT), benzothiophene (BT), 4,6-dimethyldibenzothiophene (4,6-DMDBT), was carried out via ionic liquids (ILs) extractive coupled with photochemical oxidation. In this process, sulfur compounds in n-octane were firstly extracted into the IL phase and then oxidized to corresponding sulfones. The sulfur removal efficiency of DBT with air as the oxidizing agent could reach up to 99.1% under mild conditions. Then, a possible reaction mechanism of this metal-free photochemical oxidative desulfurization system was proposed. The sulfur removal efficiency decreased slightly, even though the original S-concentration of DBT increased from 500 to 1000 ppm. The oxidation reactivity of different sulfur compounds decreased in the order of: DBT > 4,6-DMDBT > BT. The influences of alkene and aromatic addition were also investigated. Gas Chromatograph-Mass Spectrometer (GC-MS) measurements demonstrated that the sulfur compounds were converted to their corresponding sulfones and separated out of the oil phase. Under optimal conditions, the IL could be recycled at least 5 times without a remarkable decrease in activity.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
RENEWABLE ENERGY
·
2026
·
IF 9.1
Jimin Xu,Zhenhui Chen,Sa Xue,Maogang He,Xiangyang Liu
Ionic liquids (ILs) are considered as the next generation of compact thermoelectric materials, but their thermoelectric performance still requires enhancement. To overcome the thermoelectric performance bottlenecks caused by the strong Coulombic interactions and high viscosity of ILs, based on the selective solvation effect by solvents, this study proposes the idea of low-concentration IL with highly polar organic solvent as diluent to enhance both the ion mobility and the mobility difference between cations and anions. The measured Seebeck coefficient, conductivity, and thermal conductivity, the figure of merit ZT and power factor PF of the thermoelectric materials of 13 ILs + solvent binary mixtures obtained verified that our idea is feasible. The optimal combination was determined to be 0.5M 1-ethyl-3-methylimidazolium dicyanamide + dimethyl sulfoxide (0.5M [EMIM][DCA]+DMSO), with ZT of 0.039 which is 6.7 times as [EMIM][DCA]. This performance is comparable to that of thermoelectric gels. The capacitor used the designed thermoelectric materials shows an energy density of 0.45μJ/(m 2 ·K) with 5kΩ load, which is 71.5% larger than [EMIM][DCA]. This work proposes a new strategy based on binary mixtures of low-concentration IL + dipolar aprotic solvent to significantly improve IL thermoelectric performance and make liquid thermoelectric materials reach a new milestone.
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产品关联
DOI
高影响因子
LANGMUIR
·
2026
·
IF 3.9
Liyuan Cai,Jingchun Wu,Miaoxin Zhang,Yangyang Hou,Xin Yu,Bo Li,Zhao Yang,Shi Fang,Chunlong Zhang
The development of efficient, environmentally benign surfactants for stabilizing microemulsions in supercritical carbon dioxide (scCO2) remains a significant challenge for enhanced oil recovery (EOR), owing to the historical reliance on fluorinated compounds and the poor stability of conventional surfactants. Herein, we report a fluorine-free supramolecular surfactant system based on a β-cyclodextrin (β-CD) and polyethylene glycol (PEG) conjugate (denoted β-CD-PEG). This conjugate is further functionalized to enable dynamic covalent cross-linking at the interface. The surfactant system leverages host–guest chemistry to anchor the ionic liquid [Bmim][Pro] via inclusion complexation, while the PEG chain ensures scCO2 solubility. The optimized microemulsion achieves an ultralow interfacial tension of 1.8 mN/m and forms a rigid, elastic interfacial film (G′ = 15.3 mN/m) through dynamic covalent cross-linking, ensuring long-term stability (>30 days). Core-flooding experiments demonstrate a reduction in the minimum miscibility pressure by 2.50 MPa and a 17.2% incremental oil recovery. The β-CD-PEG surfactant system also exhibits enhanced selectivity for extracting heavy oil components, leading to a viscosity reduction of up to 45.1% for heavy crude. This work establishes a paradigm for stabilizing complex fluid interfaces in scCO2 using supramolecular, dynamic, and fluorine-free surfactants, with significant implications for green and efficient chemical EOR processes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Yingjie Ma,Zhike Li,Huaiyuan Wang,Haiyan Li
Polyurethane (PU) microcapsules containing [BMIm]PF 6 as a lubricant have been fabricated by interfacial polymerization. The stabilizing effect of 10 kinds of emulsifiers towards [BMIm]PF 6 ionic liquid have been delineated. A Pickering emulsion stabilized by lignin showed the best emulsification effect on highly viscous [BMIm]PF 6 . The types and reactivities of monomers have an important influence on the formation of microcapsules. Three kinds of isocyanate (IPDI, MDI, TDI) were reacted with diamines or diols to prepare the PU microcapsules in this work. The optiaml [BMIm]PF 6 @PU microcapsules were obtained when using IPDI and TETA as monomers , under conditions of 5,000 rpm emulsifying rate, 0.5 wt% concentration of lignin Pickering emulsion , and a 3:1 mass ratio of [BMIm]PF 6 /IPDI. The synthesized microcapsules have a regular and compact spherical structure, smooth outer, and inner surfaces with a mean diameter of 43 ± 15 µm, and a thickness of 3.8 µm. The core content of [BMIm]PF 6 @PU microcapsules was determined as >70%, and the initial decomposition temperature was 300 °C. The [BMIm]PF 6 ionic liquid shown excellent lubricating property, ultralow friction coefficient (decreased by 72.7%) and wear rate (decreased by 160 times) were obtained by embedding 30 wt% microcapsules into epoxy compared with pure epoxy.
研究领域:
材料科学
·
化学工程
·
高分子化学
·
润滑技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 10
·5778-5787
·
IF 2.599
Zhang Zhenlin,Zhang Zhigang,Hao Bo Nan,Zhang Hongyang,Wang Meng,Liu Ying Dan
Imidazolium-based poly(ionic liquid) (PIL) microspheres of poly(1-butyl-3-vinylimidazolium tetrafluoroborate) (P[C 4 VIm][BF 4 ]) were synthesized through a dispersion polymerization process, which was confirmed by 1 H NMR, FT-IR and SEM. Rheological measurement at different electric field strengths indicated that the P[C 4 VIm][BF 4 ] microspheres in dimethyl silicone oil (15 wt%) showed typical electrorheological (ER) performances including steady flow curves over the entire shear rate range. The ER fluid performed like a Newtonian fluid with very low shear viscosity at zero electric field, which implied the good affinity of the PIL particles with silicone oil. From the ER result, it is worth remarking that the good ER activity of the P[C 4 VIm][BF 4 ]-based ER fluid is due to the high-density ion parts which can induce strong interfacial polarization.
研究领域:
材料科学
·
高分子化学
·
智能材料
·
流变学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Shichao Feng,Yuanyuan Wu,Jianquan Luo,Yinhua Wan
In this paper, AgBF 4 /[emim][BF 4 ] supported ionic liquid membranes (SILMs) were prepared successfully for CO/N 2 separation using nitrogen pressure immobilization procedures. The incorporation of AgBF 4 could decrease membrane weight loss, improve the pressure-resistant ability, and keep the critical pressure (0.45 MPa) of the SILMs. The high viscosity and undissolved AgBF 4 solids in membrane liquid would disturb gas molecular transport through membrane and give rise to the gas transport resistance. Therefore, the gas permeability decreased remarkably with increasing AgBF 4 carrier content in the membrane. When the molar ratio of AgBF 4 to [emim][BF 4 ] increased from 0:1 to 0.3:1, the CO/N 2 selectivity of the SILMs showed a great increase from ∼1 to ∼9 at 20 °C and 0.4 MPa, suggesting that AgBF 4 was an effective carrier for CO facilitated transport. The permeabilities of N 2 and CO increased at higher transmembrane pressure, indicating that molecular transport would dominate the transport process at high pressure. The temperature-dependent gas permeability followed the Arrhenius equation. Moreover, the differences between the activation energies of CO and N 2 became larger after introducing AgBF 4 , resulting in more obvious decrease in the CO/N 2 selectivity at higher operating temperature.
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DOI
高影响因子
危险品化学品经营许可证（带存储）