MATERIALS TECHNOLOGY
·
2016
·
IF 1.442
J. F. Ren,J. Z. Li,Z. W. Song
Bi12TiO20 nanostructures were prepared in an ionic liquid (1-methyl-3-butyl imidazole bromide, [BMIM]Br)–water solvent mixture through a hydrothermal process. The effect of ionic liquid on the morphology, optical and photocatalytic properties of the products was investigated. By slightly adjusting the amount of [BMIM]Br, Bi12TiO20 nanoparticles, nanorods and raft-like ones with different crystallinities, surface areas and bandgap energies could be obtained. In these three kinds of morphologies, Bi12TiO20 nanorods with average diameter of 20–30 nm and length of 100–270 nm demonstrate the highest photocatalytic performance for its degradation of methylene orange under visible-light irradiation. The results suggest that the presence of ionic liquid in the synthetic system plays a key role in tuning the phase composition, the shape, size and purity of Bi12TiO20 powders, and hence affects their morphology-associated optical adsorption ability and photocatalytic activity.
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MOLECULES
·
2015
·Vol. 20
·期 4
·6033-6047
·
IF 2.416
Xueqin Zhang,Mingjie Chen,Chuanfu Liu,Aiping Zhang,Runcang Sun
The amidine organocatalyst 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) is an effective nucleophilic catalyst. Biocomposites with tuneable properties were successfully synthesized by ring-opening graft polymerization (ROGP) of propylene carbonate (PC) onto xylan using DBU as a catalyst in the ionic liquid (IL) 1-allyl-3-methylimidazolium chloride ([Amim]Cl). The effects of reaction temperature, reaction time and the molar ratio of PC to anhydroxylose units (AXU) in xylan were investigated. The physico-chemical properties of xylan-graft-poly(propylene carbonate) (xylan-g-PPC) copolymers were characterised by FT-IR, NMR, TGA/DTG, AFM and tensile analysis. The FT-IR and NMR results indicated the successful attachment of PPC onto xylan. TGA/DTG suggested the increased thermal stability of xylan after the attachment of PPC side chains. AFM analysis revealed details about the molecular aggregation of xylan-g-PPC films. The results also showed that with the increased DS of xylan-g-PPC copolymers, the tensile strength and Young’s modulus of the films decreased, while the elongation at break increased.
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CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Zongyuan Hu,Junnan Wang,Haifeng Dong,Shahid Hussain,Shaojuan Zeng,Yi Nie,Xiangping Zhang,Suojiang Zhang
With a series of advantages, falling film evaporator is potentially appropriate for the purification and regeneration of ionic liquids (ILs). Due to the unique molecular structure of ILs, the IL film in falling film evaporator exhibits special hydrodynamic behaviors compare with organic solvents. The Nusselt method exhibits large deviations in predicting the film thickness and film velocity of ILs, which can be ascribed to the neglect of surface tension. In consideration of surface tension and wall adhesion, a novel simulation model was developed for quantitatively predicting the hydrodynamics of falling film flow. With the proposed model, the film flow distribution, film velocity and thickness were investigated. The predicted film thickness data are in general agreement with the experimental results. A novel empirical film thickness correlation considering surface tension is proposed, with deviations less than ±10%. The hydrodynamic models will provide fundamentals for designing the falling film evaporator of IL systems.
研究领域:
化学工程
·
流体力学
·
分离过程
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2015
·Vol. 32
·期 12
·2369-2374
·
IF 1.166
Yang Xuzhao,Wang Jun,Zou Wenyuan,Wu Jinchao
A novel asymmetrical gemini ionic liquid (GIL), [1-(1-pyridinium-yl-hexyl)-6-methylpiperidinium] dihexafluorophosphate ([PyC 6 MPi][PF 6 ] 2 ) combined with pyridine, 1-methylpiperidine by 1,6-dibromohexane with PF
− 6
as anion, was synthesized and characterized by 1 H NMR and IR. The molar heat capacity of the GIL was measured via differential scanning calorimetry from 298.15 K to 448.15 K under atmospheric pressure. No phase transition or other thermal anomaly was observed in the solid-phase region (298.15 K to 358.15 K) and liquid-phase region (403.15 K to 448.15 K). The basic properties and thermodynamic functions of the GIL, such as melting point, molar enthalpy and entropy of fusion, heat capacity, enthalpy H
T
-H 298.15 K, and entropy S
T
-S 298.15 K, were also determined from the experimental data. Thermal decomposition kinetics of [PyC 6 MPi][PF 6 ] 2 were investigated by using non-isothermal thermogravimetric analysis in pure nitrogen atmosphere at various heating rates. Thermal decomposition data were, respectively, correlated with Friedman method, Ozawa-Flynn-Wall equation, and ASTM model. The activation energy (E) and pre-exponential factor (logA) values were obtained by using the above three methods.
研究领域:
物理化学
·
热力学
·
材料化学
·
离子液体
·
分析化学
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Materials Today Bio
·
2026
·
IF 11
Jiahui Song,Chenlong Liao,Runze Jin,Zhengchao Yuan,Xiao Yu,Jie Cui,Yangfan Ding,Hao Feng,Lu Han,Binbin Sun,Mohamed EL-Newehy,Meera Moydeen Abdulhameed,Jinglei Wu,Bingbing Sun,Xiaojing Li,Wenchuan Zhang,Shichao Jiang,Xiumei Mo
Conductive and anti-inflammatory microenvironments have been proven effective for peripheral nerve repair. Herein, a conductive chitosan-hydroxyethyl cellulose/ionic liquid (CS-HEC/IL) hydrogel was constructed, which was injected into a hollow anti-inflammatory poly(L-lactide-co-caprolactone)/luteolin (PLCL/Lut) nanofiber conduit. Such a PLCL/Lut-CS-HEC/IL conduit greatly enhanced the proliferation of Schwann and PC12 cells, andpromotedmacrophage transition to the M2 phenotype. Following implantation into a 10 mm sciatic nerve defect in a rat model, the scaffold was harvested 8 weeks post-surgery for histological and functional assessment. Histological analysis revealed that the conduit markedly enhanced nerve regeneration, as indicated by extensive myelination and axonal outgrowth, while functional assessments indicated improved motor recovery and nerve conduction, highlighting its therapeutic potential. Generally, the PLCL/Lut-CS-HEC/IL scaffold is a promising therapeutic strategy for peripheral nerve injuries.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Yanqing Chen,Jingke Wei,Chenglin Zheng,Wenjie Yang,Jinghui Li,Yuxuan Ye,Zhaoqing Su,Xiuhong Li,Xi Yao,Pingli Wang,Jingxia Wang,Lei Jiang
Blue phase liquid crystal elastomers (BPLCEs) have significant advantages in the field of flexible optoelectronics due to their inherent flexibility and 3D optical property structure. However, there is currently insufficient research on the functional properties of BPLCEs, particularly regarding their electro-responsive characteristics. Herein, electro-responsive BPLCE was fabricated by introducing ionic liquid (IL) into the BPLC. It was systematically investigated for the influence of IL doping concentration on the self-assembly behavior and electro-responsive performance of BPLCEs. It was found that low concentrations (<2 mg(IL)/100 mg(BPLCE)) facilitated the achievement of the BPII → BPI transition; 2–3.5 mg(IL)/100 mg(BPLCE) doping is beneficial for directly generating uniform BPI phase in the system; excessive doping (>3.5 mg(IL)/100 mg(BPLCE)) disrupts the 3D orderliness. The optimal system (2 mg(IL)/100 mg(BPLCE)) contributes to the excellent optical quality of the sample. Its glass transition temperature (Tg) is as low as −28.78 °C, with a fracture elongation of 97.6%, allowing it to flexibly deform in cryogenic environments and overcome the limitations of low-temperature applications. Under an alternating current electric field, the as-prepared sample exhibits a lower response voltage and distinct response characteristics compared to the undoped sample, showing a trend of red shift followed by a blue shift in reflection wavelength at increased voltage, which provides novel design concepts for flexible optoelectronic materials.
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JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Bingbing Yang,Dawei Shang,Wenhui Tu,Shaojuan Zeng,Lu Bai,Hong Wang,Xiangping Zhang
Using protic ionic liquids (PILs) to treat ammonia (NH 3 )-containing exhausted gases is a potential method to mitigate the air pollution and realize the ammonia recovery in industries. In order to design a new process to absorb and recover NH 3 , the understanding of variations in physical properties of PILs during NH 3 absorption is important for process design. In this work, the density and viscosity variations of PIL of 1-butylimidazolium bis(trifluoromethylsulfonyl)imide ([Bim][NTf 2 ]) with different NH 3 concentrations were measured. The results showed that the density of [Bim][NTf 2 ]-NH 3 system decreased linearly as NH 3 concentrations increased, while the viscosity exhibited a turning trend, i.e., the viscosity first increased about 15% and then decreased sharply to a lower value. It is confirmed by the NMR spectra of d-[Bim][NTf 2 ] (the proton was replaced with deuterium) that the hydrogen bond interaction exists in NH 3 and the imidazole ring. Quantum chemistry calculations further indicated that properties variations of the PIL during NH 3 absorption come from the changes of ionic interaction between the cation and anion and hydrogen bonding between PIL and NH 3 .
研究领域:
化学工程
·
环境科学
·
物理化学
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CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 22
·e202203546
·
IF 4.3
Zhaohui Yang,Meilin Guo,Pengyu Meng,Min Jiang,Xiangyun Qiu,Jiao Zhang,Chaopeng Fu
Graphical The suitability of aqueous binders for aluminum ion batteries (AIBs), especially the compatibility with ionic liquids and the distribution on the cathode surface, is systematically investigated. Typically, AIBs with sodium alginate (Na−Alg) as binder exhibit outstanding electrochemical performance in terms of specific capacity, rate capability, and cycling stability. The incompatibility of poly(vinylidene difluoride) (PVDF) with acidic ionic liquid electrolytes and the use of toxic and high-cost N-methyl pyrrolidone (NMP) solvents hinder the wide application of aluminum-ion batteries (AIBs). In this work, sodium alginate (Na−Alg) is developed as an aqueous binder for the fabrication of graphite positive electrodes in AIBs. The compatibility of various binders with the ionic liquid electrolyte is evaluated, and interaction between various binders and graphite particles before and after cycling is compared and discussed. The results demonstrate that the well compatibility of Na−Alg in ionic liquids and its reasonable distribution on the graphite surface facilitate fast charge transfer and ion diffusion, reduce electrode polarization, and thus contributing to significantly improved cycling stability and rate capability of AIBs. This work provides a new insight into the development of low-cost, eco-friendly, and high-performance binders for AIBs.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Zhixin Xiao,Min Liu,Wentao Bi,David Da Yong Chen
In-depth studies of the extraction mechanism using deep eutectic solvents (DES), especially extraction through the formation of a deep eutectic system (DESys), revealed commonalities between the DES- and ionic liquids (IL)-based extraction systems. New applications of ILs and DES for extraction of nutritional natural products were presented. In this study, the extraction behavior of choline chloride (ChCl) and 1-(2-hydroxyethyl)-3-methylimidazolium chloride ([HMIm][Cl]) in DES and IL, respectively, in mechanochemical extraction of target compounds from Moringa oleifera leaves was systematically studied. The results suggested that both extraction methods were based on the formation of a DESys, either a normal DESys or an IL DESys. Considering the DESys-based one-step extraction improves the extraction efficiency and reduces the preparation time, the same idea can be used in IL for performance improvement. By formation of a new IL deep eutectic system based on hydrogen bond interaction in extraction, similar improvement was obtained.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Danping Yuan,Fukui Xiao,Ning Zhao,Cunbao Deng,Xin Huang,Hao Zhang,Qianmin Yang,Yonggang Qiao
The catalytic conversion of the biomass platform compound sorbitol to isosorbide is an important reaction for the production of relevant renewable chemicals. The development of highly efficient heterogeneous catalyst materials offers promising perspectives for the sorbitol dehydration reaction. The complex competitive reactions, such as degradation and polymerization, are still a major challenge to obtain isosorbide in high yield. In this work, a series of ionic liquid functionalized polymer catalysts, P-[C 3/4 R]-SF, were successfully prepared by hydrothermal synthesis, which has a high surface area and strong acidity. And the catalysts were fully characterized by the N 2 sorption–desorption isotherms, elemental analysis, water adsorption isotherms, FT-IR, TGA and 31 P NMR, etc. As a result, the as-prepared P-[C 3/4 R]-SF catalysts exhibited excellent catalytic activity and stability under mild reaction condition (140 °C, 6 h). The yield of isosorbide is up to 75 %, and it still has good catalytic activity after five cycles. This work provides a synthesis method of ionic liquid functionalized polymer catalyst and its application in sorbitol dehydration reaction.
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INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Zeyu Zhang,Guiquan Jiang,Jiuyin Pang,Ling Su
In this paper, acrylate and glycidyl methacrylate (GMA) were grafted onto the main chain of soy protein isolate (SPI) in 1-butyl-2,3-dimethylimidazole chloride ionic liquid ([BDMIM][Cl]), to prepare a renewable soy protein graft copolymer via atom transfer radical polymerization (ATRP). The effect of unfolding degree of soy protein structure on pretreated SPI was studied via Fourier-transform infrared spectroscopy (FT-IR), hydrogen nuclear magnetic resonance spectroscopy (1 H NMR), surface tension (ST) and contact angle (CA) measurements. The results of FT-IR, 1 H NMR and energy dispersive spectrometry (EDS) indicated the successful synthesis of 2-bromoisobutyryl-functionalized SPI.The analysis of FT-IR and 1 H NMR spectra showed that the soybean protein graft copolymer was successfully synthesized. In addition, the grafting of acrylate onto soybean protein enhanced the hydrophobicity of the copolymer, and the static contact angle was above 90°. Differential scanning calorimetry (DSC) analysis revealed that the thermal stability of pretreated SPI was reduced. The new glass transition temperature in the copolymers also proved the successful synthesis of the copolymers. The tensile strength of the carbon fiber multifilament infiltrated with the copolymers was improved, indicating their potential application in the reinforcement of carbon fiber material.
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RSC Advances
·
2022
·Vol. 12
·期 7
·4408-4416
·
IF 4.036
Guanhao Liu,Jingyi Yang,Yibo Zhao,Xinru Xu
Novel modified MOF intercalated hydrotalcites was synthesized for catalyzing the conversion of glycerol into high value-added glycerol carbonate in this paper. [APmim]OH/ZIF-8 was prepared by encapsulating aminopropyl hydroxide imidazole ionic liquid in ZIF-8 and inserted in Ca–Mg–Al hydrotalcites with layered structures to prepare [APmim]OH/ZIF-8/LDH with strong basicity and high specific surface area. ZIF-8, [APmim]OH/ZIF-8 and [APmim]OH/ZIF-8/LDH were characterized by XRD, FT-IR, SEM and nitrogen adsorption–desorption. The results showed that the conversion rate of glycerol can reach 98.6% and the glycerol carbonate yield was 96.5% in the transesterification of glycerol with dimethyl carbonate catalyzed by [APmim]OH/ZIF-8/LDH when the molar ratio of DMC and glycerol was 3 : 1, the catalyst dosage was 3 wt%, the reaction temperature was 75 °C and the reaction time was 80 minutes. The glycerol conversion rate can still reach more than 90% after five reaction cycles.
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