INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jian Chen,Hongyan Wang,Hui Wang,Zengxi Li
Oligomerization of C4 olefins is one of the important pathways to utilize this type of resource for the production of high value-added chemicals. The spatial distribution of acid sites in the catalyst is closely related to the catalytic performance and product distribution. Ionic liquids (ILs) are a promising class of catalysts for butene oligomerization. Fabricating an ionic liquid into a poly(ionic liquid) is an effective approach to regulate the acid site distribution. Herein, various acidic poly(ionic liquid)s were synthesized by changing the polymerization method, copolymer block monomer structure, porogens, and assembly sequence during the synthesis process. Characterization results indicated that polymerizing the acidic ionic liquid monomer (1-vinyl-3-sulfobutylimidazolium triflate) with an appropriate amount of cross-linker (divinylbenzene) could effectively regulate the spatial distribution of active sites. The addition of lipophilic comonomers improved the lipophilicity of poly(ionic liquid)s to enhance the miscibility between butene and the catalyst. Moreover, it was found that adjusting the assembly sequence can further disperse the spatial distribution of the active sites of the IL monomer. The poly(ionic liquid) obtained by assembling the comonomer first and then copolymerizing the IL monomer and divinylbenzene, i.e., APIL-DVB@PDVB-EGDMA, contained a sufficient amount of Brønsted acid and exhibited good lipophilicity, with further improved spatial dispersion of acidic sites. When APIL-DVB@PDVB-EGDMA was used as the catalyst, isobutene was completely converted within 1 h, and the dimer selectivity reached 72.4%, in comparison with 100% for conversion and 39.2% for dimer selectivity in the catalysis by the ionic liquid monomer after 3 h.
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Mingyuan Dou,Qing Feng,Kangchun Li,Zhenpeng Li,Fuchuan Huang,Fukang Deng
The unique physicochemical properties and 2D layered structure of MXene make it a promising lubricant additive. However, its chemical instability limits its application in environmentally friendly and sustainable lubrication systems. Although various strategies have been explored to enhance the chemical stability and tribological properties of MXene aqueous solutions, these approaches often compromise MXene's chemical compatibility and require high-viscosity petroleum-based lubricants. In this study, choline hydroxide and amino acids were added to a Ti 3 C 2 T x aqueous solution, leading to the self-assembly of choline hydroxide and amino acids into ionic liquid micelles. These micelles effectively passivated the surface of Ti 3 C 2 T x and improved its chemical stability. The experimental and simulation results showed that the ionic liquid micelles facilitated the formation of hydrogen bonds and coordination bonds between the amino acid and the Ti 3 C 2 T x surface. This interaction increased the binding energy by 2.5 times, preventing oxidation and degradation for over 90 days of storage. Moreover, during frictional processes, a TiN/TiO 2 reaction film formed between choline hydroxide, amino acids, and Ti 3 C 2 T x contributed to improved tribological properties, reducing the friction coefficient by up to 39.18 % and the wear rate by up to 69.79 %, while ensuring long-term friction stability.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Zhanpeng Jiang,Zeyu Zhang,Yuetong Lin,Jingyi He,Xiaohang Liu,Jiuyin Pang
In a novel solvent system consisting of lithium salt/ionic liquid, glycidyl methacrylate (GMA) was grafted onto the surface of soybean protein using atom transfer radical polymerization (ATRP), resulting in the preparation of a soybean protein-based graft copolymer. To establish a strong interfacial force, N-hydroxymethyl acrylamide (NMA) was introduced between the soybean protein adhesive and poplar veneer. The effects of unfolding degree of soybean protein structure on the properties of pretreated soybean protein were studied by Fourier-transform infrared spectroscopy (FT-IR), hydrogen nuclear magnetic resonance spectroscopy ( 1 H NMR) and thermal analysis (TGA, DTG), and the results showed that the synthesis of Soybean protein macromolecular initiator (SPI-Br) and soybean protein-glycidyl methacrylate graft copolymer (SPI-g-PGMA) was successful. In addition, the pretreatment of poplar veneer with N- hydroxymethyl acrylamide improved the penetration depth of the adhesive on the veneer. The treated plywood has excellent performance and has good application prospects in construction, furniture manufacturing and other fields.
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2024
·Vol. 10
·期 2
·138
·
IF 5
Long Quan,Xueqian Shi,Jie Zhang,Zhuju Shu,Liang Zhou
A novel lignocellulosic aerogel, MT-LCA, was successfully prepared from MT by undergoing partial dissolution in an ionic liquid, coagulation in water, freezing in liquid nitrogen, and subsequent freeze-drying. The MT-LCA preserves its original honeycomb-like porous structure, and the newly formed micropores contribute to increased porosity and specific surface area. FT-IR analysis reveals that MT, after dissolution and coagulation, experiences no chemical reactions. However, a change in the crystalline structure of cellulose is observed, transitioning from cellulose I to cellulose II. Both MT and MT-LCA demonstrate a quasi-second-order kinetic process during methylene blue adsorption, indicative of chemical adsorption. The Langmuir model proves to be more appropriate for characterizing the methylene blue adsorption process. Both adsorbents exhibit monolayer adsorption, and their effective adsorption sites are uniformly distributed. The higher porosity, nanoscale micropores, and larger pore size in MT-LCA enhance its capillary force, providing efficient directional transport performance. Consequently, the prepared MT-LCA displays exceptional compressive performance and efficient directional transport capabilities, making it well-suited for applications requiring high compressive performance and selective directional transport.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2025
·
IF 9.7
Liwei Niu,Siwen Zhang,Xiaoyu Si,Yuhan Fang,Shuang Wang,Lulu Li,Zunlai Sheng
This study investigates the potential of ionic liquids (ILs) as sustainable solvents in ultrasonic-assisted extraction (UAE) to efficiently recover luteolin from peanut shells. Among the range of ILs tested, 1-butyl-3-methylimidazolium tetrafluoroborate stood out as the most effective solvent, achieving the highest extraction yield. Single-factor experiments were conducted to analyze the effects of ultrasonic power, extraction time, extraction temperature, IL concentration, and solid-to-liquid ratio on extraction efficiency. Further optimization of the extraction conditions was performed using response surface methodology and neural network analysis, resulting in a significantly enhanced luteolin yield of 3.71 ± 0.06 mg/g. Interaction energy analyses were conducted to elucidate the interactions between ILs and luteolin, confirming the experimental findings and highlighting the strongest interaction energy between 1-butyl-3-methylimidazolium tetrafluoroborate and luteolin. A kinetic model for luteolin extraction was developed, demonstrating that the extraction process follows a second-order rate model, where the extraction rate is directly proportional to the square of the concentration difference between luteolin and the solvent. The outcomes of this research present an efficient protocol for luteolin extraction and provide novel insights into the application of UAE in extracting natural products.
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Youhong Ai,Faqiong Zhao,Baizhao Zeng
A novel proton-type ionic liquid doped polyaniline (HIL-doped PANI) coating was presented, which was prepared on a stainless steel wire by electrodeposition in an aqueous solution containing aniline and 1-sulfobutyl-3-methylimidazolium hydrosulfate. The HIL-doped PANI coating showed granular nanostructure and had large specific surface. When it was applied to the headspace solid-phase microextraction of several amines (i.e., aniline, N -methylaniline, 3-methylaniline, 2-chloroaniline and 3-chloroaniline), it showed high extraction efficiency. The enrichment factors were 191.8–343.9 for different amines, much higher than those of common PANI and commercial polydimethylsiloxane/divinylbenzene coatings. Coupled with gas chromatographic analysis, the linear ranges were 0.097–100 μg/L with correlation coefficients above 0.9942, and the detection limits were 0.012–0.048 μg/L (S/N = 3) for different amines. The relative standard deviations (RSD) were smaller than 8.1% for five successive measurements with single fiber and the fiber-to-fiber RSDs were 8.6–13.8% ( n = 5) for these amines. The proposed method was successfully applied to the extraction and determination of amines in organic waste water samples, and the recoveries were 78.3–112.8% for different analytes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zhijun Zhang,Peng Zhang,Zhenjie Liu,Binyang Du,Zhangquan Peng
The shuttle effect of polysulfide and the flammability of the conventional electrolyte are the two major obstacles restricting the development progress of lithium–sulfur batteries. Exploring highly efficient electrolyte components coupled with the conventional electrolyte is a reliable strategy to solve these issues. However, the current electrolyte components usually relieve these issues at the expense of the sacrificed electrochemical performance. Herein, a novel zwitterionic ionic liquid named as TLTFSI is reported, which exhibits a high ionic conductivity of 3.7 × 10–3 S cm–1, a wide electrochemical potential window from 1.51 to 4.82 V at 25 °C, and a high thermal decomposition temperature of 275 °C. The optimized TLTFSI-based electrolyte is nonflammable and performs superior electrochemical performance in terms of larger capacity, better rate capability, and longer cyclic life compared with the conventional organic electrolyte. The robust performance is attributed to the high intrinsic ionic conductivity, the suppressed polysulfide dissolution/diffusion, and the high interface compatibility toward the lithium anode of the TLTFSI-based electrolytes. This present work represents the first demonstration of the zwitterionic ionic liquid to efficiently improve the overall electrochemical performance and the safety of lithium–sulfur batteries.
✓ 已验证
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 16
·4638
·
IF 3.623
Shangjie Jiang,Shisheng Zhou,Bin Du
In this study, the polymer PTSPM-PMETAC with anion adsorption properties was prepared by a one-step method, then the amino-modified nano-SiO2was grafted onto the polymer to improve the roughness of the surface and enhance the stability of superhydrophobic properties, and a high-stability superhydrophobic paper with ion-induced wettability transition properties was successfully prepared. The study found that the paper can realize the reversible control of surface wettability through the exchange between the anions PF6−and Cl−adsorbed on the surface of PMETAC, and further investigation of the effect of different solvents on the ion exchange properties found that water was the poor solvent for ion exchange, while the mixtures of methanol, acetone, and methanol & water were the good solvent. On the whole, the preparation of superhydrophobic paper by this method not only simple in preparation process, low in cost and strong in universality, but also the prepared superhydrophobic paper has high transparency and good stability, which has great application potential in industrial production.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Qian Zeng,Biao Hu,Hongye Cheng,Lifang Chen,Junmei Huang,Zhiwen Qi
Isobutyl isobutyrate is an important chemical which can be formed in a reactive extraction process with ionic liquid as dual solvent-catalyst. To design such an intensified process, the liquid-liquid equilibria (LLE) data for the esterification system involving ionic liquid are essential. In this work, the LLE of ternary systems {isobutyl isobutyrate (IBIBE) + isobutyric acid (IBAc) or isobutanol (IBOH) + 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIm][HSO 4 ])} and the quinary system {IBAc + IBOH + IBIBE + H 2 O + [BMIm][HSO 4 ]} were measured at temperature T = (298.2, 323.2 and 353.2) K, T = (323.2, 333.2, 343.2 and 353.2) K and atmospheric pressure, respectively. Based on the experimental data, the solute distribution coefficient and the selectivity were determined, which confirms the feasibility of the ionic liquid for isobutyl isobutyrate formation. The phase behaviour was explained by the molecular interaction using σ -potential analysis. Moreover, the binary parameters of the NRTL model for [BMIm][HSO 4 ] catalysed isobutyl isobutyrate formation system were fitted.
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 4
·750-757
·
IF 0.64
Zhang Dongyu,Qu Rong,Zhang Haining,Zhang Fangfang
Amine-functionalized imidazolium-based poly(ionic liquid) brushes on mesoporous silica were synthesized via “grafting through” technique and were applied as model sorbents to understand physisorption and chemisorption of carbon dioxide molecules. The experimental results reveal that the total adsorption capacity of model sorbents derived from temperature programmed desorption (TPD) approach reaches 1.72 mmol·g −1 that is much higher than the sum of adsorption capacity of bare mesoporous silica and free polymers at 25 °C under carbon dioxide partial pressure of 0.2 bar. The proposed physical adsorption and chemical adsorption of carbon dioxide molecules in TPD response curves were validated by volumetric desorption measurement. It is also observed that physical adsorption is completely reversible and chemical adsorption is irreversible. The results demonstrate that the temperature programmed desorption technique is an effective approach to differentiate chemisorption and physisorption of gaseous species on solid sorbents, which is beneficial for understanding of adsorption mechanism and materials design.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Qi Shen,DingYu Xing,Feiyun Sun,Wenyi Dong,Wentao Shang,Lingyan Zhao,Zijun Dong
Ceramic membrane bioreactor (CMBR) is an attractive alternative for wastewater treatment , although still subjects to fouling problem. This study facilely modified CM by oxidative polymerization of pyrrole with ionic liquid , to greatly enhance its conductivity and hydrophilic, and to sustainably mitigate fouling in an electric CMBR. Highly conductive ceramic membrane, BVIMBF 4 -CM, was facile obtained involving an ionic liquid 1-vinyl-3-butylimidazolium tetrafluoroborate (BVIMBF 4 ) on the base CM (Base-CM). After simple modification, the electrical resistance of CM was reduced significantly from 1017 Ω/sq to 349 Ω/sq, while its water contact angle decreased from 44.0° to 30.5°. With the assistant of minute electric field, BVIMBF 4 -CM exhibited a high rejection efficiency of over 85% Cu 2+ , 65% Ni 2+ and 93% bovine serum albumin (BSA). The interaction energy analysis verified BVIMBF 4 -CM itself prevent BSA from the membrane surface by the positive total interfacial energy. Meanwhile, the electrophoretic force provided by electric field enhanced the removal efficiency and antifouling capability of the BVIMBF 4 -CM. By using this modified CM to form an E-CMBR, a comparable removal efficiency as the CMBR could be stably obtained, which especially demonstrated significantly anti-fouling performance, as fouling rate decreased by 31.4–43.5%, and the total membrane resistance was only 60.8% of the Base-CM, under a minute electric field of 0.8 V/m. Enhanced hydrophilicity and conductivity of the BVIMBF 4 -CM take major responsible for this stable fouling alleviation in the E-CMBR. The new and facile method for CM modification proposed herein can serve as a reliable effort towards the application of antifouling E-CMBR system in wastewater treatment.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yafei Sang,Jianhan Huang
Porous materials with high Brunauer-Emmett-Teller (BET) surface area ( S BET ) and abundant ionic active sites facilitate efficient CO 2 capture and conversion. Herein, a kind of novel benzimidazole-based hyper-cross-linked poly(ionic liquid)s (HPILs) were developed via the hyper-cross-linking strategy and the as-prepared HPILs possessed high S BET (485–780 m 2 /g), plentiful micro/mesoporosity, and abundant ionic active sites. The HPILs showed noteworthy CO 2 uptake (79–143 mg/g at 273 K and 1.0 bar), moderate isosteric heats (32–45 kJ/mol), and acceptable CO 2 /N 2 selectivity (IAST: 23–46). Intriguingly, HPILs-Cl-2 exhibited excellent catalytic activity for CO 2 cycloaddition and 99% of propylene oxide was successfully converted to cyclic carbonates under mild conditions (70 °C, 0.1 MPa CO 2 , 9 h). This synthetic strategy is of great importance for the functionalized hyper-cross-linked polymers and the synthesized HPILs are promising for efficient CO 2 capture and conversion under mild conditions.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）