JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
·
IF 2.1
Yutong Gong,Feng Liu,Jun Sui,Yanlong Lv,Yuhao Wang,Yunze Hao,Xiaodong Wang,Hongguang Jin
Absorption heat pumps are categorized into two main types: absorption heat pumps (AHPs) and absorption heat transformers (AHTs). AHT is defined as a system that upgrades medium-temperature heat to higher temperatures for industrial applications. So far, the majority of research on working pairs has been concentrated in the medium-to-low temperature range of AHPs, this research delves into the thermodynamic evaluation and performance metrics of ternary working pairs designed for high-temperature absorption heat transformers. The integration of ionic liquids (ILs) with conventional H2O/LiBr mixtures aims to overcome the drawbacks of traditional working pairs, including issues like corrosion and toxicity. The corrosion rates of eight ternary IL working pairs were measured under high-temperature conditions. After a preliminary evaluation of short-term corrosion measurements, four working pairs with lower corrosiveness were selected for further thermodynamic analysis. The results indicate that the ternary working pairs containing [EPy][Br] and [BMIM][I] exhibited lower viscosity, but their specific heat capacities were notably lower compared to the working pair containing [EMIM][Ac]. Furthermore, the ternary working pair containing [EMIM][MeSO3] showed significantly higher corrosiveness than the other three pairs. Based on this analysis, the ternary working pair formed by adding [EPy][Br] to the conventional LiBr solution demonstrates greater potential for application in high-temperature AHT systems.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Jielong Zhou,Bo Wang,Xiandong Hao,Zhiyong Xu,Wenbo Zhao
In the absorption of SO 2 , it is very important for industrial applications to set up mathematical models to describe the changes in physical–chemical properties and the absorption dynamic processes. However, most of the research only pays attention to the molecular structure of absorbent. Few works have investigated the mathematical models in the absorption processes. To make up for the research gap in this area, a binary absorbent composed of 2-(dibutylamino)ethanol (DBEA) and 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate ([Emim][TfO]) were developed for SO 2 capture in the present work. A systematic mathematical model was proposed to accurately predict the viscosity and density of the absorption system with different absorbent compositions, SO 2 absorption capacities, and temperatures. Additionally, the absorption kinetics and thermodynamics were analyzed across varying absorbent compositions and SO 2 -containing gas flows, enabling dynamic prediction of the absorption process. Furthermore, the correlation between desorption residuals and desorption temperature was investigated, along with an analysis of SO 2 /CO 2 selectivity and the cyclic SO 2 absorption performance. This work provides a robust framework for rational screening and design of alkanolamine-IL hybrid solvents, bridging the gap between experimentally empirical solvent development and theoretical prediction.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoqing Ming,Jiaying Du,Changgeng Zhang,Miaomiao Zhou,Guijuan Cheng,He Zhu,Qi Zhang,Shiping Zhu
Self-healing ionic conductors in all solid state without evaporation or leakage offers great potential for the next-generation soft ionotronics. However, it remains challenging to endow ionic conductors with all solid state while keeping their essential features. In this study, an intrinsically conducting polymer is developed as all-solid-state self-healing ionic conductors based on ion–dipole interactions within a fluorinated poly(ionic liquid) copolymer. This unique material possesses good self-healing ability at room temperature (96% of healing efficiency in 24 h), large strain (1800%), optical transparency (96%), and ionic conductivity (1.62 × 10–6 S/cm). The self-healing polymer itself is intrinsically conductive without any additives or fillers, thus it is almost free of evaporation or leaking issues of traditional conducting gels. An alternating-current electroluminescent device with self-healing performance is demonstrated. It is anticipated that this strategy would provide new opportunities for the development of novel self-healing ionotronics.
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PubMed
高影响因子
Materials
·
2021
·Vol. 14
·期 16
·4712
·
IF 3.623
Fan Hu,Jun Gao,Biao Zhang,Fugang Qi,Nie Zhao,Xiaoping Ouyang
In this work, a new composite material with excellent dynamic impact resistance and outstanding quasi-static mechanical properties was synthesized. The composite material is composed of a polyurethane elastomer and a novel nano-polymer. The nano-polymer was composed of silane coupling agent-modified alumina microspheres and functionalized ionic liquids by double bond polymerization. The universal testing machine and split Hopkinson pressure bar were used to characterize the compression behavior, strength and energy absorption of the composite materials under static and dynamic conditions. Additionally, the comprehensive mechanical properties of polyurethane elastomer with different nano-polymer loadings (0.5–2.5 wt.%) were studied. The results show that whether it was static compression or dynamic impact, the polyurethane elastomer with 1% nano-polymer had the best performance. For the composite material with the best properties, its compressive yield strength under the static compression was about 61.13% higher than that of the pure polyurethane elastomer, and its energy absorption of dynamic impacts was also increased by about 15.53%. Moreover, the shape memory effect was very good (shape recovery is approximately 95%), and the microscopic damage degree was relatively small. This shows that the composite material with the best properties can withstand high compression loads and high-speed impacts. The developed composite material is a promising one for materials science and engineering, especially for protection against compression and impacts.Keywords:impact resistance;ionic liquid;nano-Al2O3;polyurethane elastomer
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高影响因子
ChemCatChem
·
2014
·Vol. 6
·期 12
·3328-3332
·
IF 5.044
Xuan Xu,Haoran Li,Yong Wang
Graphical Being picky: N-Doped carbon (CN- x ) derived from N-containing ionic-liquid precursors are used as Pd nanoparticle supports for the selective hydrogenation of phenol to cyclohexanone with high activity and selectivity under mild reaction conditions. The activities of the Pd@CN- x catalysts derived from a variety of ionic liquids are different, and studies on the physical properties, Pd status, and N species of the catalysts are performed. In this report, a kind of mesoporous N-doped carbon (CN- x ) derived from N-containing ionic-liquid (IL) precursors were synthesized, and Pd@CN- x prepared by a simple ultrasound-assisted method showed higher catalytic activity for the selective hydrogenation of phenol and its derivatives under mild reaction conditions in water than commercial Pd@C and other common Pd heterogeneous catalysts. The catalytic activities of Pd@CN- x derived from different ILs were different, and further study into the influencing factors, including physical properties, N species of CN- x , and Pd status of Pd@CN- x , were performed.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Ran Wei,Bo Yang,Chao He,Lunqiang Jin,Xiang Zhang,Changsheng Zhao
Superhydrophilic/superhydrophobic surfaces with unique superiority have been applied for oil-water separation over a long time. Facing the increasingly complicated requirements in diverse separation fields, developing intelligent surfaces with switchable superhydrophilic/superhydrophobic properties are highly needed. In this work, versatile and robust poly(ionic liquid) (PIL) coatings were designed and a series of intelligent materials with switchable superwettabilities were generated for high-efficient oil-water separation. The PIL coatings were obtained by polymerization of PIL monomer on the roughened GO sheets, for which were realized by the immobilization of Fe 3 O 4 nanoparticles. Three materials with different structures (cotton fabric (CF), nylon fabric (NF) and cotton ball (CB)) were chosen as the coating substrates. After “dip-coating” process, the PIL coated materials (PCMs) exhibited switchable superhydrophilic/superhydrophobic performances due to the anion-responsive behavior of PIL and the roughness enhanced effect. Thus, the PCMs showed high-efficient separation performances upon multiple oil-water separation cycles, and the separation could be switched between “water-removing” and “oil-removing” by anion exchange. Meanwhile, the PIL@CF had high permeate fluxes, which could separate layered water-oil mixtures rapidly under gravity; the PIL@NF had the highest separation efficiency; the PIL@CB possessed great potential to be used as efficient absorbents for water/oil adsorption and recycle.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Hongjin Kuang,Haiyang Liao,Zhanzhan Zhang,Shitao Huang,Binhui Mao,Weiyin Shan,Xiaofei Duan,Xiaolong Feng,Ting Li
High-energy-density lithium-metal batteries have garnered significant interest as an emerging class of energy storage devices. However, the intrinsic high reactivity of lithium metal introduces critical safety challenges for electrolytes (dendrite penetration and thermal runaway), severely hindering their development. This paper presents the preparation of a dynamic Diels-Alder-crosslinked metal-organic framework/poly (ionic liquid) composite electrolyte (DA-PIL/MOF) using ultraviolet (UV) curing, based on the design of furan-functionalized zirconium 1,4-dicarboxybenzene MOF (Fu-UiO-66) and maleimide-functional vinylimidazole ionic liquids (MA-IL-VI). The imidazolium cations along the PIL chains facilitate the dissociation of lithium salts. Furthermore, the incorporation of Fu-UiO-66 as a crosslinker with polymer chains establishes effective Li + pathways, thereby boosting ion transport and transference number (the ionic conductivity: 3.6 mS cm −1 at 30 °C; Li + transference number: 0.51). The incorporation of MOF into the composite electrolyte imparts flame retardancy, enhancing its thermal safety. The compact cross-linked structure ensures close contact between the electrolyte and electrodes. Additionally, the dynamic DA reaction endows the electrolyte with thermal self-healing, contributing to extended durability. Consequently, lithium iron phosphate-based cells utilizing the composite electrolyte exhibit remarkable electrochemical performance.
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高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Shaoping Ma,Wang Yu,Changyong Cai,Xixia Song,Lili Tang,Dandan Liu,Xuhong Guo,Zhijian Tan
Membranes are widely used for separating bioactive molecules, and ionic-liquid-based membranes have new applications for separating structurally similar homologs. However, these applications are limited by low separation efficiencies and poor reusability. In this study, poly(ionic liquid) (PIL) nanoparticle were successfully prepared via emulsion polymerization and deposited onto a base membrane to prepare a microchromatographically supported membrane. The ability of the membrane to separate tanshinone homologs (tanshinone I and tanshinone IIA) was evaluated. A maximum tanshinone selectivity of 60.7 % was obtained under optimal conditions, with preferential filtration of tanshinone ⅡA and rejection of tanshinone I, which is significantly distinct from the small different of adsorption effect between PIL on the two types of tanshinones under static adsorption conditions. This membrane achieved rapid and effective separation of tanshinones and exhibited favorable water flux through its microchromatographic structure. This membrane based on PILs nanoparticle has the potential to separate other structurally similar homologs.
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FUEL
·
2024
·
IF 6.7
Yongxin Ding,Jun Lin,Panjie Yu,Hongwei Zhang,Yongde Ma,Zhenping Cai,Yanning Cao,Kuan Huang,Lilong Jiang
The design of novel practical catalysts is critical for the blossoming of biodiesel green-energy, in which Mo-based catalysts are of particular interest. In this work, an in-situ synthesis method was proposed to obtain a combo Mo-based ionic liquid and SAPO-11 catalyst. The catalyst presents both highly dispersed MoS 2 as hydrodeoxygenation active sites and acidic sites for isomerization. MoS 2 with a few fine layers can be identified based on TEM images and the Brønsted acid sites are dominant based on Pyridine-IR analysis. A great performance of MoS 2 /C 8 min-15 %SA can be obtained under optimized reaction conditions with 100 % conversion of methyl palmitate, 75.0 mol% hydrodeoxygenation to n -C 15 -C 16 , and 20.5 mol % isomerization to i -C 15 -C 16 . The structure and activity of the catalyst can be retained at least for 4 cycles. Thin layers and high sulfurization, large amount of Brønsted acid sites, and suitable reaction conditions are key points to achieve a significant performance and avoid over cracking and deactivation. On basis of detected intermediates and kinetic data simulations, a complex reaction pathway was proposed and the specific k values for each elementary reaction were provided for the hydrodeoxygenation and isomerization of methyl palmitate.
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JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2011
·Vol. 89
·期 4
·705-711
·
IF 1.587
Li Rui-Jun,Chen Li,Yan Zong-Cheng
Biodegradable trimethylolpropane triesters of oleic acid were synthesized by esterification of trimethylolpropane and oleic acid over a multi-SO 3 H-functionalized strong Brønsted acidic ionic liquid as the catalyst. The results showed that the esterification can proceed satisfactorily over the catalyst at an ambient pressure even without simultaneous removal of water. Under the optimal reaction conditions (temperature: 100 °C, reaction time: 3 h, reactant molar ratio: 3.6:1, and catalyst amount, high conversion rate of trimethylolpropane (99.0%) and selectivity of trimethylolpropane triester (92.1%) were obtained. The ionic liquid was reused six times after the removal of water and no obvious change in catalytic activity was detected. Operational simplicity, high yields along with good reusability makes the multi-SO 3 H-functionalized ionic liquid a promising catalyst for the esterification of trimethylolpropane with oleic acid.
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FUEL
·
2022
·
IF 8.035
Hang Xu,Anqi Niu,Zhewen Yang,Fengmin Wu,Xiaoxi Guo,Xuefeng Wei,Jun Zhang
Poly-ionic liquid catalyst has both the advantages of ionic liquid and polymer, and overcomes the poor fluidity of ionic liquid, so it has become one of the hot spots in catalytic oxidative desulfurization. A polyvinyl-3-butylimidazolium cobalt chloride salt (poly-[BVIM][CoCl 3 ]) ionic liquid catalyst was prepared and characterized. When coupled with potassium monopersulfate (PMS), the catalyst formed a catalytic oxidative desulfurization system. The results showed that the prepared poly-[BVIM][CoCl 3 ] system had a microsphere morphology with a diameter of 28 μm, and the interior structure was a mesoporous structure formed via the self-assembly of two-dimensional thin-layered nanowires with a carbon skeleton width of 20 nm. The specific surface area was 10.54 m 2 ·g −1 , the pore volume was 0.029 cc·g −1 , and the average pore diameter was 3.5 nm. The optimum experimental conditions were: a catalyst dosage of 20 mg, 0.4 g of PMS (20 %) as oxidant, a reaction temperature of 20 °C, 2 g of acetonitrile as extractant, simulated sulfur-containing oil with dibenzothiophene (DBT) concentration of 500 ppm, and an initial sulfur content of 6 g. After 20 min, the sulfur removal reached more than 99 % and remained over 90 % even after the catalyst was recycled five times. The desulfurization sequence for different organosulfur compounds was DBT greater than 4,6-dimethyl dibenzothiophene (4,6-DMDBT) > benzothiophene (BT). The main desulfurization product was determined to be DBTO 2 by GC–MS analysis, and the speculated desulfurization mechanism was that Co(II) catalyzed PMS to form ·SO 4 − , which then oxidized the target molecules. The extraction-catalytic-oxidative desulfurization kinetic was established and verified that the desulfurization process accorded with zero-order reaction kinetics. The reaction rate constant ( k p ) for the production of ·SO 4 − was estimated to be 4.24 × 10 −9 ppm −1 ·min −1 .
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International Journal of Minerals Metallurgy and Materials
·
2018
·Vol. 25
·期 9
·1027-1034
·
IF 1.261
Wang Le-ping,Chen Gang,Shen Qi-xin,Li Guo-min,Guan Shi-you,Li Bing
SnCo alloy nanowires were successfully electrodeposited from SnCl 2 −CoCl 2 −1-ethyl-3-methylimidazolium chloride (EMIC) ionic liquid without a template. The nanowires were obtained from the molar ratio of 5:40:60 for SnCl 2 :CoCl 2 :EMIC at −0.55 V and showed a minimum diameter of about 50 nm and lengths of over 20 μm. The as-fabricated SnCo nanowires were about 70 nm in diameter and featured a Sn/Co weight ratio of 3.85:1, when used as an anode for a Li-ion battery, they presented respective specific capacities of 687 and 678 mAh·g −1 after the first charge and discharge cycle and maintained capacities of about 654 mAh·g−1 after 60 cycles and 539 mAh·g −1 after 80 cycles at a current density of 300 mA·g −1 . Both the nanowire structure and presence of elemental Co helped buffer large volume changes in the Sn anode during charging and discharging to a certain extent, thereby improving the cycling performance of the Sn anode.
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