CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Xia Liu,Shanshan Dai,Peng Liu,Jian Lan,Yuanqiang Zhu
Oily wastes are the serious environmental hazards in petroleum industry . Solvent extraction has commonly been used to remove oil from these wastes. However, the traditional solvents suffer from challenges such as difficult separation of oil and solvent, and high solvent consumption. Here, oil separation and solvent reuse were well achieved through the phase transition of ionic liquid system (D-230-FA system) between one phase and two phases, which the process procedure was simple. The ionic liquid (D-230-FA) was successfully formed by poly (propylene glycol) bis (2-aminopropyl ether) D-230 and fatty acids, which was demonstrated by 1 HNMR and FT-IR. The acid-basic switchability of the D-230-FA system was studied by pH, FT-IR. The process of separating oil based on the D-230-FA system was studied by SEM, infrared spectrophotometry test, Soxhlet extraction and molecular dynamics simulation. The results show that the D-230-FA system exhibited excellent acid-basic switchability, the extraction rate could reach 97.59 % and the residual oil rate in the solvent was less than 0.1495 %. Thus, the acid-base switchable D-230-FA system will be expected to treated as the effective extractant for sustainable separation of oily wastes.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Xingyu Lin,Hongsheng Lu,Ruoxin Zhang,Ziteng Yang,Yingjiang Chen,Baiwen Huang
CO 2 flooding offers dual benefits by enhancing oil recovery and facilitating CO 2 storage. However, reservoir heterogeneity and clay swelling can significantly limit CO 2 storage capacity. Here, a novel strategy for in-situ formation of particle profile control agent and clay swelling inhibitor was established by CO 2 -responsive ionic liquids (ILs). Two fatty acid (FA)-based ILs were synthesized by reacting N, N -dimethylcyclohexylamine (DMCHA) with myristic acid (C14) and palmitic acid (C16). After CO 2 injection, FA was precipitated again as a particle profile control agent with a particle size exceeding 10.65 μm, while the protonated DMCHA in the remaining liquid phase serves as a clay swelling inhibitor. Notably, the precipitation of FA within the core increases the CO 2 storage capacity by 1.96 times. This innovative approach holds great promise for enhancing the efficiency and sustainability of CO 2 injection, benefiting both the petroleum industry and environmental protection.
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POLYMER COMPOSITES
·
2025
·
IF 4.7
Liyun Guo,Haichang Zhang,Jing Hua
To better substitute natural rubber latex (NRL) with cis -1,4-polyisoprene latex (IRL), and thus fundamentally solve the problem of allergies induced by NRL products in humans, a novel latex compounding method was devised. This method aimed to enhance the mechanical properties of IRL films by non-covalently modifying graphene oxide (GO) with ionic liquids (IL), which significantly improved the dispersion of GO in water. The interaction between IL and GO was thoroughly investigated. Subsequently, IL-GO/IRL composite latexes featuring a fine dispersion of IL-GO were successfully developed. An extensive investigation into the properties and morphology of the IL-GO/IRL latex revealed their stability, excellent film-forming abilities, and superior mechanical characteristics, rendering them ideal for dipping processes. The resulting thickness-adjustable IL-GO/IRL composite films exhibited remarkable mechanical properties. Notably, the tensile strength of the 1.5IL-GO/IRL vulcanized film surpassed that of GO/IRL films by 2.75 times and NRL films by 10.49%. Additionally, the crosslinking density of the IL-GO/IRL vulcanized films was improved. Further analysis of the interaction between IL-GO and polyisoprene macromolecules was also conducted. The composite films are poised to find applications in high-end medical and artificial intelligence fields. Highlights Mechanical performance of IRL was enhanced by introducing IL-GO. Fine GO dispersed composite latexes were ideal for the dipping process. Composite films boast superior mechanical properties surpassing NRL films. Resulting composite film was thickness-adjustable and ultra-thin. CC bonds in IL and IR formed covalent linkages, boosting GO-IR chain interaction.
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高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yongbo Duan,Xiao Liu,Pingxia Guo,Qiang Chen,Meirong Cai,Feng Zhou
A protic poly(ionic liquid) (PPIL), PPDG, was synthesized by using a copolymer as the cationic component and halogen-free octanoylglycine as the anionic counterpart. The viscosity-enhancing and tribological properties of the PPDG additive were systematically characterized. In addition, scanning electron microscopy (SEM), electrical contact resistance (ECR), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS) analysis were employed to elucidate the lubrication mechanisms of PPDG. The results indicate that the addition of PPDG in deionized water significantly enhances the viscosity, anticorrosion, and tribological performance of the water-based lubricant. The coefficient of friction (COF) and wear volume (WV) of the water-based lubricant with 8% PPDG were reduced by approximately 68 and 75%, respectively, compared with deionized water. The synergistic action of the physical adsorption film and the tribochemical reaction film formed at the friction interface endows the lubricant with superior lubrication and anticorrosion properties. This type of PPIL lubricant additive is free of sulfur, phosphorus, and halogen elements, making it environmentally friendly. It demonstrates significant potential for application in fully synthetic water-based metalworking fluids or nonflammable hydraulic fluids.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jintao He,Junyuan Hua,Xiaohua Ma,Jianxin Li
The global high-tech industry is experiencing a consistent rise in the demand for cesium. Consequently, it is essential to establish a continuous and energy-efficient method for the recovery of Cs + from aqueous solutions. In this study, a novel supported ionic liquid membrane (SILM) was engineered by incorporating a crown ether-ionic liquid extraction system into the pores of a crown ether-based porous membrane, which was synthesized from 18-crown-6 ether-based polyimide (CE-PI) through non-solvent induced phase separation (NIPS). The findings indicate that the Cs + permeation rate in the SILM system containing free crown ether with a concentration of 0.12 mol/L achieved 3.36 μm/s, representing a 24-fold increase compared to that of the SILM system without free crown ether. When the feed phase comprised mixed ions (K + /Cs + /Rb + ) at a concentration of 50 ppm each, and 0.5 mol/L HCl was used as a stripping phase, the Cs + permeation flux of the SILM system reached 0.233 μg m −2 s −1 , which is substantially greater than that of the competing ions K + (0.001 μg m −2 s −1 ) and Rb + (0.005 μg m −2 s −1 ). The corresponding separation factors (SF) for Cs/K and Cs/Rb in the SILM system were determined to be 10.10 and 7.44, respectively. The high performance of the SILM system is attributed to the ion transport channels established by the free crown ether and ionic liquid within the membrane pores. DFT calculations and MD simulations demonstrated that the free crown ethers in the ionic liquid are instrumental in selectively complexing Cs + owning to their unique chelation interaction (E Cs = −288.5 kJ/mol), thereby promoting the transport of Cs + within the SILM system.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1216-1225
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IF 3.925
Anqi Niu,Hang Xu,Qinlin Yuan,Fengmin Wu,Xuefeng Wei
Lewis acidic ionic liquid-loaded Fe3O4@SiO2 magnetic catalytic microspheres were prepared. When coupled with persulfate, the microspheres catalytically oxidized and removed dibenzothiophene (DBT) from octane. The microspheres used for catalytic desulfurization were characterized and analyzed by SEM, TEM, FT-IR, VSM, and TG-DTA. The results indicated that the prepared catalytic desulfurization microspheres had a uniform particle size distribution, an overall diameter of 200 nm, and a core diameter of Fe3O4 of about 180 nm. The saturation magnetization of the catalytic desulfurization microspheres was 39.8 emug−1, which allowed them to be rapidly magnetically separated. The optimal experimental conditions were 1.5 g catalyst, 1.2 g PMS (20%) oxidant, 30 °C, an initial sulfur content of 500 ppm, 6.0 g octane, and 3.0 g acetonitrile. Under these conditions, the desulfurization rate reached 98.5% after 25 min, which decreased by about 10% after five recycles. GC-MS analysis indicated the oxidation product was dibenzothiophene sulfone (DBTO2). In the desulfurization mechanism, DBT was first extracted by acetonitrile. Then, in the acetonitrile phase, Co2+ catalyzed hydrogen persulfate to form active oxygen atoms that oxidized DBT and eventually formed DBTO2.
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高影响因子
Materials
·
2020
·Vol. 13
·期 1
·191
·
IF 3.057
Ya’e Qi,Ling Zhang,Yongxia Wang
Ionic liquid (IL) combined with 2D materials has evoked considerable attention in the field of lubrication applications because of their speical structure and outstanding lubrication properties. However, the ambiguous effect of the 2D materials on the friction and anti-wear properties of the IL needs futher study. Here, we have obtained two families of IL composite films with additives of MoS2and graphene via a combined process of spin-coated and curing, and the distinction of the effects of two additives on the tribological performance of the IL films was studied. The friction tests showed that the friction coefficient and anti-wear life of the IL films were greatly enhanced after the addition of MoS2or graphene, which could be attributed to the improved load-carrying capacity and the second lubrication phase. Under a low addition content, graphene had more advantages to reduce the friction of the films, and MoS2was more beneficial to the tribological properties with the additional content increased. The films with low friction and good anti-wear properties may be valuable for the rational design of lubrication films for the practical engineering applications.Keywords:ionic liquid film;MoS2nanosheet;graphene;friction;anti-wear
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Huawei Yang,Qing Zhang,Jinhao Zhang,Lixia Yang,Zihao Ma,Li Wang,Hongguo Li,Liangjiu Bai,Donglei Wei,Wenxiang Wang,Hou Chen
Immobilization of polyoxometalates (POMs) plays significant roles in their industrial applications. In this work, POM-supported catalyst has been developed with cellulose nanocrystal (CNC) as a sustainable carrier and employed in the aerobic oxidative desulfurization (AODS) of fuels. The catalyst was constructed by grafting a poly(ionic liquid) (PIL) onto CNCs and subsequently exchanging the counterions of the PIL into [Co(OH) 6 Mo 6 O 18 ] 3− , a kind of POM anionic clusters. The resulting CNC@PIL@POM was systematically characterized and utilized as a catalyst in the AODS of thiophenic compounds including benzothiophene (BT), dibenzothiophene (DBT), and 4, 6-dimethyldibenzothiophene (4, 6-DMDBT), with oxygen contained in air as oxidizing agent. The catalyst could achieve complete conversion of DBT in model diesel under mild condition and be reused five times without apparent losing of activity. As for the desulfurization of a real diesel, it was demonstrated that almost all of the original sulfides were completely converted. Based on these results, it is expected that the core-shell POM-supported catalyst may serve as an efficient, separable and sustainable catalyst for AODS of fuels.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yujuan Chen,Yuyang Jiang,Zhaoen Liu,Lifang Yang,Quanzhou Du,Kelei Zhuo
The improvement of the wettability between electrode materials and ionic liquid electrolytes is critical to increase the performance of electrode materials for supercapacitors. Herein, we demonstrate the synthesis of a urea phosphate-derived graphene aerogel (UPGA) with good wettability by one-step hydrothermal treatment using graphene oxide (GO) as the precursor and urea phosphate (UP) as both the nitrogen dopant and hydroxyl group protector. The as-obtained UPGA has appropriate doped-N atoms, unique hierarchical porous structure, and good wettability by 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF 4 ) ionic liquid. The UPGA displays a high specific capacitance of 196.7 F g −1 at 1 A g −1 . Moreover, a symmetrical UPGA-based supercapacitor delivers an excellent energy density of 97.2 Wh kg −1 at a power density of 0.9 kW kg −1 and a good cycling stability with the capacitance retention of 78.3% after 5500 cycles at 1 A g −1 . Therefore, the UPGA exhibits great potential in supercapacitor as electrode material.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Na Wang,Xuesheng Zhou,Bo Cui
In this work, a polymeric imidazolium-embedded octadecyl ionic liquid (poly(1-vinyl-3-octadecylimidazolium naphthalene sulfonate))-grafted silica (poly(C 18 VIm + NapSO 3 − )@SiO 2 ) sorbent was prepared and applied as a solid-phase extraction (SPE) sorbent in extraction of flavonoids. The synthesized poly(C 18 VIm + NapSO 3 − )@SiO 2 sorbent was characterized by X-ray photoelectron spectrogram (XPS) and fourier transform infrared spectroscopy (FT-IR). The thermodynamic and kinetic adsorption models of the prepared poly(C 18 VIm + NapSO 3 − )@SiO 2 sorbent towards flavonoids were discussed by nonlinear fitting adsorption curve and the results indicated the thermodynamic adsorption model in this work was tended to be Freundlich model rather than Langmuir one and the pseudo-second order model could be used to describe the dynamic adsorption process. In addition, the adsorption amounts indicated the sorbent has satisfactory extraction capabities towards flavonoids. For investigating the influence of independent variables and their interactions on the extraction efficiency, a Box-Behnken design was used for optimizing three greatly influential parameters after performing single-factor experiments. The interaction energies between flavonoids and two ionic liquids were calculated to understand the adsorption mechanism. Under the optimal conditions, a method used for determining flavonoids was developed by combining SPE technique with high performance liquid chromatography (HPLC), and the developed method exhibited low limits of detection (0.25–0.4 μg L -1 ), good linearities with correlation coefficients (R 2 ) in the range of 0.9951–0.9996 and satisfactory recoveries ranging from 83.6% to 114.1%, which confirmed the proposed method could be successfully used to determine trace flavonoids in real samples.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Wenlong Xiang,Chenyang Shen,Zhe Lu,Si Chen,Xiang Li,Rui Zou,Yueping Zhang,Chang-jun Liu
Ionic liquid (IL) immobilized zeolitic imidazolate framework (ZIF) catalysts (IL-ZIF-8) were prepared through grafting IL on a dual-ligand ZIF by a facile post-synthetic modification. The coordinately unsaturated Zn as Lewis acid sites and bromide ions as Lewis base sites were confirmed in the resulted IL-ZIF. The density of Lewis acid/base sites was tuned easily by content of mixed linkers in the framework and/or the IL loadings. The coexistence of Lewis acid/base sites remarkably improved the activity for cycloaddition of CO 2 with propylene oxide, compared with parent ZIFs and IL. In the absence of any co-catalyst and solvent, the prepared IL-ZIF-8(0.3) obtained a high yield of 97% with good stability and reusability. Besides, a Lewis acid/base synergistic catalytic mechanism was proposed. The synergetic interaction of Lewis acid sites and Lewis base sites significantly reduces energy barrier of propylene oxide ring-opening to 11.5 kcal mol −1 and thus promotes the CO 2 cycloaddition reaction.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ying Zhang,Xuehui Lan,Huan Tang,Peng Gao,Huiying Li,Cui Liu,Jigang Wang
Artemisinin has garnered significant research interest due to its potent antimalarial properties. The selective isolation of artemisinin from Artemisia annua L. remains technically challenging due to its low natural abundance and the cumbersome separation from co-extracted waxy oil. In this study, a series of novel poly(ionic liquid) (PIL) adsorptive membranes featuring varying alkyl chain lengths were synthesized by polymerization at room temperature. The PIL membranes were applied to separate artemisinin from waxy oil and the results demonstrated that the membranes exhibited outstanding purification performance. The PIL − 12 achieved rapid adsorption of waxy oil with a capacity of 358.49 mg/g within 40 min and the purity of artemisinin exceeded 99 % after a single crystallization step under optimal conditions. Moreover, the PIL-12 still possessed excellent separation for artemisinin after six cycles. The purification mechanism was investigated through both experimental and theoretical simulation approaches, revealing that the PIL membrane simultaneously adsorbed multiple waxy oil components via electrostatic forces and hydrogen bonding interactions. Moreover, the PIL adsorptive membranes displayed strong antibacterial activity against E. coli and S. aureus . This study provides critical design strategies and novel insights for the separation of bioactive compounds from traditional Chinese medicines.
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