JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Yingying Zhang,Yuxin Zhang,Anlei Yi,Jie Wei,Dawei Fang
Ether-group functionalized ionic liquid N-(2-methoxyethyl)-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide, [C1OC2pyrr][NTf2], was synthesized and characterized by 1H NMR, 13C NMR, and TGA. The density and surface tension of binary mixtures including [C1OC2pyrr][NTf2] and monohydric alcohols were measured over the entire range of mole fractions in different temperatures. Based on the experimental data of density and surface tension, the volumetric and surface properties of [C1OC2pyrr][NTf2] and its binary mixtures were obtained, and Vm, αp, and VE were explored. The effects of temperature and composition on these properties were investigated, and the excess molar volume of two binary mixtures was well fitted by the Redlick-Kister equation. The molar surface Gibbs energy (gs) of [C1OC2pyrr][NTf2] and its binary mixtures was calculated, and the traditional Eötvös equation was modified; moreover, all parameters had a clear physical meaning. Finally, based on gs, the surface tension of [C1OC2pyrr][NTf2] and its binary mixtures was estimated, and it is in good agreement with experimental values.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Dong Fu,Guoqing Huang,Yang Xie,Mingming Zheng,Ji Feng,Kan Kan,Jun Shen
Conductive hydrogel-based ionic skins have attracted immense attention due to their great application prospects in wearable electronic devices. However, simultaneously achieving a combination of a single hydrogel system and excellent comprehensive performance (i.e., mechanical durability, electrical sensitivity, broad-spectrum antibacterial activity, and biocompatibility) remains a challenge. Thus, a novel poly(ionic liquid) hydrogel consisting of poly(acrylamide-co-lauryl methacrylate-co-methyl-uracil-imidazolium chloride-co-2-acryloylamino-2-methyl-1-propane sulfonic acid) (AAm-LMA-MUI-AMPS) was prepared by a micellar copolymerization method. Herein, MUI serves as a supramolecular crosslinker and conductive and bacteriostatic components. Owing to the multiple supramolecular crosslinks and hydrophobic association in the network, the hydrogel exhibits excellent mechanical properties (624 kPa of breaking stress and 1243 kPa of compression stress), skin-like modulus (46.2 kPa), stretchability (1803%), and mechanical durability (200 cycles under 500% strain can be completely recovered). Moreover, with the coordinated combination of each monomer, the hydrogel exhibits the unique advantage of high conductivity (up to 59.34 mS/cm). Hence, the hydrogel was further assembled as an ionic skin sensor, which exhibited a gauge factor (GF) of 10.74 and 7.27 with and without LiCl over a broad strain range (1–1000%), respectively. Furthermore, the hydrogel sensor could monitor human movement in different strain ranges, including body movement and vocal cord vibration. In addition, the antibacterial activity and biocompatibility of the hydrogel sensor were investigated. These findings present a new strategy for the design of new-generation wearable devices with multiple functions.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiahe Li,Weihong Wu,Rui Duan,Xue Bi,Weihua Meng,Jianzhong Xu,Hongqiang Qu
A molybdenum-based metal organic framework (Mo-MOF) and graphene oxide (GO) hybrid functionalized with boron-containing ionic liquid ([BMIM]BF 4 ) (GMB) was reported to effectively improve the fire safety and mechanical property of epoxy resin (EP). When 3 wt% GMB was added, the CO production rate, peak heat release rate and peak smoke release rate of EP composites decreased by 55.88%, 52.10% and 40.12%, respectively. The flame retardant mechanism was the combination of catalytic carbonization ([BMIM]BF 4 and Mo-MOF), physical barrier effect (GO) and gas phase dilution (H 2 O and NH 3 in gas production). Meanwhile, the incorporation of [BMIM]BF 4 endowed EP composites with excellent mechanical properties.
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Journal of CO2 Utilization
·
2022
·
IF 8.321
Ye Qu,Yanglin Chen,Yifei Ye,Ping Xu,Jianmin Sun
Heterogenization of homogeneous catalysts without the loss of activity is still a huge challenge. Herein, homogeneous [HTMG][His][I] amino acid ionic liquid (IL), consisting of 1,1,3,3-tetramethylguanidine cation, histidine anion and iodine anion, were introduced into the pore channels of SBA-15 substrate with the assistance of supercritical CO 2 (scCO 2 ) media. Due to its low viscosity, high diffusivity and absence of surface tension, scCO 2 enabled [HTMG][His][I] to highly disperse in SBA-15 pore channels. Surprisingly, [HTMG][His][I]/SBA-15 heterogeneous catalyst displayed higher CO 2 cycloaddition activity (95% propylene carbonate yield) than equivalent molar pristine [HTMG][His][I] homogeneous catalyst (69% propylene carbonate yield) under the identical conditions. The significantly enhanced activity was resulted from the synergistic effect of [HTMG][His][I] and SBA-15 support. Moreover, [HTMG][His][I]/SBA-15 performed outstanding universality of various epoxides and reusability. This work developed a promising strategy to heterogenization of homogeneous IL catalyst assisted by scCO 2 as synthetic media and provided an efficient catalyst for CO 2 conversion.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 25
·13333-13344
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IF 14.511
Xiaoqian Li,Dechao Wang,Zhongjie He,Fangfang Su,Jing Zhang,Yudeng Wang,Yangyang Xin,Hongni Wang,Dongdong Yao,Mingtao Li,Yaping Zheng
The introduction of ionic liquids crystals (ILCs) into porous liquids (PLs) might be an effective way to overcome the problems associated with their processability, such as leakage, packaging, transportation, and long-term stability. Herein, a generalizable strategy to construct stimuli-responsive porous ionic liquids (SRPILs) based on the self-assembly of responsive ILCs and metal–organic frameworks (MOFs) has been demonstrated. The unique rapid reversible transition behaviors of the SRPILs induced by shearing and heating stimuli are verified. Furthermore, the SRPILs exhibited an approximately 3-fold increase in adsorption capacity for CO2 and C2H4 compared with that of the neat ILC solvent, confirming that the accessible porosity was retained in the SRPILs. Remarkably, the stimuli-responsiveness of the SRPILs can be demonstrated through changes in their phase, porosity, gas adsorption, and separation. Benefiting from their stimuli-responsive nature, SRPILs can be regarded as “smart porous liquids”, undoubtedly providing enormous inspiration for the development of new applications, including but not limited to gas capture/separation, sensing, catalysis, and electrochemical applications.
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
Ying Li,Hua-Xu Ling,Yu Gao,Shuo Zhang,Bing Yan
The application of the excellent luminescence properties of lanthanide β-diketonate complex in water systems is the focus of the research in this field. We introduced the lanthanide β-diketonate complex into the framework of polyionic liquid (PIL) and SiO2 to prepare a lanthanide complex hybrid material fluorescent probe SiO2@PIL-Eu(nta)4, which can be used for the detection of bovine hemoglobin in water. Hydrophilic polyionic liquid grafted with SiO2 nanoparticles was the template of the hybrid material. The lanthanide complex was introduced into the prepared spherical polyionic liquid brushes by ion exchange. The obtained products were characterized by Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), nuclear magnetic resonance (NMR), ultraviolet–visible (UV–vis) spectroscopy, and luminescence spectroscopy. The PIL matrix improved the fluorescence lifetime and quantum efficiencies of the lanthanide complex. The as-synthesized hybrid material was employed as a fluorescent probe for the bovine hemoglobin detection in an aqueous solution and the limit of detection is 0.0803 mg/mL. The addition of H2O2 can intensify the quenching of the fluorescent probe. In addition, we analyzed and discussed the quenching mechanism of the probe. The bovine hemoglobin can quench the fluorescence of the probe with the inner filter effect. In the presence of both H2O2 and bovine hemoglobin, the structure of the probe is oxidized by the superoxide anion in the system and the fluorescence of the probe is quenched by the mechanism of static quenching.
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RSC Advances
·
2022
·Vol. 12
·期 16
·9744-9754
·
IF 4.036
Xuejing Liu,Xiaowei Chen,Hao Zhang,Shangde Sun
Caffeic acid (CA) is widely found in nature, and has a broad spectrum of biological activities. However, the low hydrophilicity and lipophilicity of CA limited its application. Dodecyl caffeate (DC) is the lipophilic ester of caffeic acid (CA), and also has high antioxidant activity. In this work, CA, used as a substrate, and three ionic liquids with different acidities and H2SO4 were used as economic catalysts for DC preparation. The effects of variables on DC yield were investigated and optimized by response surface methodology (RSM). And the kinetic and thermodynamic parameters of the esterification of CA and dodecanol were evaluated. Results showed that lipophilic DC was successfully synthesized using ionic liquid ([Hnmp]HSO4) as a catalyst. And the optimal conditions by RSM were substrate ratio of 10.2 : 1, IL dosage of 9.8% at 87 °C for 118 min. Under the optional conditions, the maximum DC yield was 94.67 ± 1.32%. The k0, Ea, ΔH, ΔS, and ΔG were 7.18 × 107 mol (L min)−1, 65.77 kJ mol−1, 63.10 kJ (mol K)−1, −103.80 J (mol K)−1, and 99.78 kJ mol−1 at 363 K, respectively. DC prepared in this work showed a good DPPH radical scavenging activity, which indicated that DC can be used as a potential antioxidant in food and cosmetics.
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
He Zhang,Jinde He,Ting Peng,Jinqing Qu
Multifunctional adhesive hydrogels have great potential in flexible wearable materials, smart wearable materials, and biomedical materials. However, the preparation of such hydrogels is still challenging. Here, a P(MArg-FHVI-AA) hydrogel was prepared by copolymerization of an arginine derivative monomer, ionic liquid imidazolium salt derivative monomer, and acrylic acid (AA). Based on multiple weak hydrogen bonds and electrostatic interactions, the hydrogel had the following characteristics: high transparency (>85%), ultra-stretchability (2613%), high elasticity (1000% strain cyclic for 10 times), fatigue resistance (200 cycles under 80% compressive strain), self-healing, good adhesion in air and water (37 and 32 kPa for porcine skin in air and water), and electrical conductivity. When metal ions were added to P(MArg-FHVI-AA) hydrogels, the mechanical properties of the hydrogels were enhanced (tensile strength of 109–352 kPa, stretchability of 1707–1942%), and the hydrogels exhibited stronger adhesion strength (68 kPa for porcine skin), good biocompatibility (99%), impressive antibacterial properties (100% antibacterial effect against Escherichia coli and Staphylococcus aureus), shape memory, fluorescent writing (its fluorescence intensity was 1099% of the initial), and information transfer functions. Furthermore, the P(MArg-FHVI-AA) hydrogel showed real-time performance in monitoring various motions. This work provided an idea for the construction of multifunctional and smart adhesive conductive hydrogel materials, and this hydrogel could be a promising candidate for smart wearable materials, health monitoring, and soft body materials.
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RESOURCES CONSERVATION AND RECYCLING
·
2022
·
IF 13.716
Shangqing Chen,Yanan Dong,Honghong Wang,Jingjing Sun,Junfeng Wang,Suojiang Zhang,Haifeng Dong
The selective and efficient cesium recovery from natural brines resources is a significant and challenging issue. Here we reported a green method for the facile construction of mesoporous Prussian blue analogs (PB) through an ionic liquid-assisted strategy and used for cesium recovery from salt lake brines and geothermal water. The unique nanostructures endowed this mesoporous PB with the improved cesium adsorption capacity (548.7 mg/g), which was 1.5-times as that of conventional PB (362.8 mg/g), placing it at the top level of cesium adsorbents. The adsorption experiments in salt lake brines and geothermal water were conducted and the adsorption efficiency of Cs + exceeded 90%, while those for other co-existing cations were <4.2%, demonstrating its favorable selectivity in cesium recovery from multicomponent aqueous solutions. The benign adsorption performance and adsorption-desorption stability make it a potential candidate for the sustainable recovery of cesium from different kinds of Cs-containing water resources.
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EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Shuai Han,Ruoyu Zhang,Lijing Han,Chunjun Zhao,Xiaowen Yan,Mingzhi Dai
The developing trends of the traditional transistor include being synaptic and flexible, which could down low the energy cost and realize the daily application of flexible electronics, respectively. However, only bendable synaptic transistor has been developed, which is mainly restricted by the rigid components. Among which, the channel layer has not been replaced by any stretchable material yet. In this work, we synthesized an ionic polyurethane (iPU), and blend it with ionic liquid (IL) to construct a flexible channel layer with high transparency, stability, antifatigue and stretchability. The self-healing process can be completed at ambient and operating temperatures, and the self-healing speed was accelerated by the elevated temperature. The recovery ratio of the iPU/IL film was 95% after cyclic stretch to 50% strain for 100 cycles, which proved good antifatigue property. The stable combination between iPU and IL was verified by the two-dimensional Raman spectra, and the interconnected paths of IL around hard domains were discovered, which was probably due to the strong interaction between ions and hard segments. Spin coating technology was applied to construct the iPU/IL channel layer on a Si matrix, and an ionic conductive transistor was manufactured subsequently, in which the conductive mechanism is similar with a true synapse. The resulted transistor showed an on-off ratio of 2.1 × 10 2 , and its energy dissipation was only 64 nJ when simulating the signal transmission of a nerve synapse, which was close to the power cost in other synaptic transistors.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 12
·4302-4316
·
IF 3.348
Yaxuan Wang,Tingting Feng,Junxiu Piao,Jinyong Ren,Mingyu Ou,Yaofei Wang,Richeng Lian,Jiahui Cui,Haocun Guan,Chuanmei Jiao,Xilei Chen
In this article, flame-retardant cotton fabric was prepared by a step-by-step dip-coating method, in which flame retardants were introduced onto the surface of the cotton fabric by hydrogen bonding association and surface grafting reaction. First, the epichlorohydrin-modified aramid nanofibers (AEP) were accumulated onto the surface of cotton fabric (Cot/AEP) through hydrogen bond association. Subsequently, the ionic liquid (IL) was grafted onto the surface of AEP to obtain Cot/AEP/IL. The fire safe performance of cotton fabrics was investigated by the limiting oxygen index test (LOI), vertical flammability test (VFT), and cone calorimeter test (CCT), and so forth. The LOI value of Cot/AEP/IL was as high as 29.5%. The VFT results showed that Cot/AEP/IL was self-extinguishing rather than ignited, leaving a char length of 111 mm. The CCT results demonstrated that the peak heat release rate and total heat release of Cot/AEP/IL decreased by 42.5% and 58.8% compared with untreated cotton fabrics, respectively. The TG test showed that Cot/AEP/IL had more residues left than untreated cotton under both N 2 and air atmospheres. The presence of phosphorus enables the cotton fabric to generate an aromatic phosphor carbonaceous structure during the combustion process. In addition, the tensile strength of cotton fabric was tested. After the introduction of AEP/IL, the average tensile strength value of untreated cotton improved from 129 to 167 N in the warp direction and 125–155 N in the weft direction. In summary, the introduction of AEP/IL improved both the flame-retardant and mechanical properties of the cotton fabric significantly.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yangyang Wang,Shuwen Chen,Ronghao Liu,Lixin Zhang,Wenfeng Xue,Yanzhao Yang
The development of efficient ionic liquids (ILs) for disposable separation and recovery of various precious metals was of great importance, but still faced difficult challenges. A phase change temperature-controlled system composed of IL and HCl solution was developed for the extraction and separation of Au(III), Pd(II) and Pt(IV) from secondary resources. UCST (upper critical solution temperature)-type IL ([1,4,7-TMTA][Tf 2 N]) possessed outstanding selectivity of precious metals and the property of temperature-controlled phase transition. The ability of ILs to form solvated hydrogen bonds was confirmed by quantum-chemical calculation to be correlated with their corresponding UCST. Different experimental parameters were optimized to explore the extraction behavior of IL. It is noteworthy that homogeneous liquid-liquid extraction system (HLLE) constructed by UCST-type IL could significantly enhance the extraction kinetic of Au(III), Pd(II) and Pt(IV) by decreasing phase interface resistance. For Au(III), Pd(II) and Pt(IV), when the system temperatures were higher than 40 °C, 49 °C and 65 °C, the maximum values were 98.5%, 98.3% and 93.2% at the highest efficiency. In addition, the extraction mechanism of anion exchange was revealed by UV–vis, IR, NMR and LC-MS spectrometry. At last, Au(III), Pd(II) and Pt(IV) could be selectively separated from multi-metal solutions where impurity ions coexist by K 2 C 2 O 4 , NH 3 ·H 2 O and CS(NH 2 ) 2 /HCl, respectively. After 5 cycles, the extraction performance of [1,4,7-TMTA][Tf 2 N] maintained. In summary, this paper overcame the obstacle of slow kinetics of solvent extraction technology, and pointed out a way for polymetallic co-extraction and separation in HLLE system.
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危险品化学品经营许可证（带存储）