JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 2
·1-12
·
IF 2.5
Zhang Yige,Song Honghong,Dai Zhifeng,Xiong Yubing
In this
study, nitrogen and sulfur-codoped porous carbon material (ZC) was prepared via carbonization of the complex of hydrophobic poly(ionic liquid) (PIL) and zein through electrostatic interaction. The structure and morphology of ZCs were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and Raman spectroscopy. In addition, nitrogen adsorption–desorption analysis showed that ZCs were mainly mesoporous, and the pore size was in a narrow dispersity. The surface area of ZC-10 could be as high as 764 m 2 g −1 , and the total pore volume was 0.41 cm 3 g −1 . Remarkably, the specific capacitance of the electrode prepared by ZC-10 was 338 F g −1 in 2.0 M KOH at a current density of 0.1 A g −1 and presented excellent cycle stability. After 5000 cycles, the specific capacitance still remained stable. Therefore, our finding suggested a facile strategy for the fabrication of porous carbon materials with high capacitance performance through PIL and biomacromolecule composites. Considering their easy preparation and biomass source, ZCs are of great potential in the future applications of electronic devices and systems.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Xueting Li,Shiqing Zhang,Xiaonan Li,Lu Lu,Bo Cui,Chao Yuan,Li Guo,Bin Yu,Qingqing Chai
With ever-growing demand for eco-friendly materials for wearable electronics, biopolymer-based hydrogels have drawn significant attention. As one of the most abundant and biodegradable biopolymers, starch-based hydrogels have a great potential for wearable electronics. However, mechanical fragility, low conductivity and subzero freeze restrict their applications. Here, a multifunctional hydrogel was facilely fabricated by integrating ionic liquid and graphene oxide into potato starch/polyvinyl alcohol skeleton via a green physical-crosslinking method. The abundant hydrogen-bond and electrostatic interactions endowed the hydrogel with excellent stretchability (657.5 %), strength (0.64 MPa), high conductivity (1.98 S·m −1 ) and good anti-freezing property (< −20 °C). Multiple characterizations and theoretical simulation (DFT) were combined to understand and confirm the interactions among different components. Taking advantage of these properties, multimodal wearable sensors were constructed for sensing tension (gauge factor: 6.04), compression (gauge factor: 3.27) and temperature (sensitivity: 0.71 %/°C), which are applied for monitoring human motion, daily-life pressure and body temperature. The sensor had a good anti-fatigue property with stable signals during 2000 cycles. Moreover, the sensor can effectively recognize handwriting and perform human-computer interaction. This work provides a promising route to develop sustainable and multifunctional biopolymer hydrogels for wearable sensors with versatile applications in human health, exercise monitors and soft robots.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Wenqi Song,Tiantian Xu,Liwei Qian,Sufeng Zhang,Chaoli Wang,Yuzhen Zhao,Zemin He,Valentin Nica,Zongcheng Miao
With the trend of sustainable development and the complex medical environment, there is a strong demand for multimodal antibacterial cellulose wound dressing (MACD) with photothermal therapy (PTT). Herein, a novel MACD fabrication strategy with PTT was proposed and implemented through graft polymerization of an imidazolium ionic liquid monomer containing iron complex anion structure. The fabricated hydrogels exhibited excellent antibacterial properties because of the efficient photothermal conversion ability (68.67 %) of ionic liquids and the intrinsic structural characteristic of quaternary ammonium salts. The antibacterial ratio of cellulosic hydrogel dressings to S. aureus and E. coli could reach 99.57 % and 99.16 %, respectively. Additionally, the fabricated hydrogels demonstrated extremely low hemolysis rates (<5 %) and excellent cell viability (~>85 %). Furthermore, in vivo antibacterial experimental results proved that the fabricated antibacterial dressings could significantly accelerate wound healing. Therefore, the proposed strategy would provide a new method of designing and preparing high-performance cellulose wound dressings.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 21
·6416-6426
·
IF 6.177
Binxiong Guang,Wei Zhang,Yiwei Zhang,Yahui Xiao,Yong Liu
A novel, efficient and economical process of cyclohexanol (CHOL) production based on cyclohexene esterification–hydrogenation has become a research hotspot in recent years. Wherein, hydrogenation of cyclohexyl acetate (CHA) derived from the esterification of cyclohexene with acetic acid is a crucial step. Combining the advantages of metal complexes and heterogeneous catalysts, the robust Cu(I) coordinated amino-functionalized poly(ionic liquid)s (PILs-Cu(I)) were, in this research, synthesized for use in the mild and highly selective hydrogenation of CHA to CHOL. The results of FT-IR, UV-vis, BET, XPS and SEM-EDS confirmed that the Cu(I) was dominant in the PILs-Cu(I), and was homogeneously and stably coordinated on the amino-functionalized poly(ionic liquid)s. Benefiting from that, the PILs-Cu(I) was endowed with an unprecedented performance in the mild and highly selective hydrogenation of CHA to CHOL. Specifically, 95.6% CHA conversion with 96.6% selectivity of CHOL, and 97.0% selectivity of ethanol was obtained under extremely mild conditions of 80 °C and 2 MPa H2. Furthermore, no significant activity loss was observed over the PILs-Cu(I) after recycling for at least five times, delivering excellent stability and reusability.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xinzhu Gao,Wei Yuan,Yang Yang,Yaopeng Wu,Chun Wang,Xuyang Wu,Xiaoqing Zhang,Yuhang Yuan,Yong Tang,Yu Chen,Chenghao Yang,Bote Zhao
Utilizing ionic liquids (ILs) with low flammability as the precursor component for a gel polymer electrolyte is a smart strategy out of safety concerns. Solvate ionic liquids (SILs) consist of equimolar lithium bis(trifluoromethylsulfonyl)imide and tetraglyme, alleviating the main problems of high viscosity and low Li+ conductivity of conventional ILs. In this study, within a very short time of 30 s, a SIL turns immobile using efficient and controllable UV-curing with an ethoxylated trimethylolpropane triacrylate (ETPTA) network, forming a homogeneous SIL-based gel polymer electrolyte (SGPE) with enhanced thermal stability (216 °C), robust mechanical strength (compression modulus: 1.701 MPa), and high ionic conductivity (0.63 mS cm–1 at room temperature). A Li|SGPE|LiFePO4 cell demonstrates high charge/discharge reversibility and cycling stability with a capacity retention rate of 99.7% after 750 cycles and an average Coulombic efficiency of 99.7%, owing to its excellent electrochemical compatibility with Li-metal. A close-contact electrode/electrolyte interface is formed by in situ curing of the electrolyte on the electrode surface, which enables the pouch full cell to work stably under the conditions of cutting/bending. In view of the excellent mechanical, thermal, and electrochemical performances of SGPE, it is believed to be a promising gel polymer electrolyte for constructing high-safety lithium-ion batteries (LIBs).
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Fangxian Wang,Juanxuan Guo,Shihao Li,Yuwei Wang,Yang Cai,Zhuo Li,Yongming Shen,Changping Li
As a typical latent functionally thermal fluid with large energy storage capacity and good liquidity, phase change material emulsion (PCME) plays a broad and important role in solar energy utilization. However, the high-temperature instability and supercooling problems of PCME limit its practical application. The ionic liquid (IL)-based PCME allows for the possibility of being used as a heat transfer fluid (HTF) under more extreme temperature conditions. In this work, stearic acid (SA)/IL PCME, prepared by one-step self-assembly of MXene nanosheets at the SA/IL interface, can effectively absorb and convert solar energy into thermal energy. Furthermore, MXene-decorated SA/IL PCMEs have good high-temperature stability, little supercooling degree (0.9–3.1 °C), and large energy storage capacity. The maximum apparent specific heat capacity and average absorbance of the MXene-decorated SA/IL PCME are 4.5 and 303.1 times higher than those of IL, respectively. Under 2 sun irradiation, the 0.05–20 wt% MXene-decorated SA/IL PCME achieves high photo-thermal conversion efficiencies (91.3% at 68.9 °C, 39.4% at 115.1 °C) due to its large energy storage capacity and excellent optical absorption property. The simple interfacial self-assembly provides a promising strategy to prepare high-performance SA/IL PCME used as a novel HTF for medium-temperature solar energy utilization systems.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2022
·Vol. 147
·期 23
·13253-13259
·
IF 4.755
Chen Yiyang,Wu Weihong,Zhang Man,Cui Yumeng,Zhang Kailun,Qu Hongqiang
The thermal degradation and flame retardancy effect between ionic liquid-modified graphene and hexaphenoxy cyclotriphosphazene on epoxy resin (EP) was investigated using thermogravimetric analysis, differential thermogravimetric analysis, thermogravimetric analysis-infrared spectrometry (TGA-FTIR) and the char residue analysis. The carbonization and synergistic flame-retardant mechanism were obtained. The results showed that, compared with pure EP, the char residue amount of flame-retardant EP was increased, which was dense and continuous with fewer and smaller pores. This was due to the compatibilization of the ionic liquid to the matrix, resulting in the good dispersion of the flame retardant in EP matrix to promote the carbonization efficiency. The TGA-FTIR analysis showed that the PO·and HF free radicals produced by decomposition of flame retardants quenched the flame in the gas phase, and the produced water vapor and NH 3 diluted the concentrations of combustible gas and oxygen to inhibit the progress of combustion. Graphical abstract
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 9
·092522
·
IF 4.386
Jian-Ru Li,Cun-Ying Xu,Jing-Ling Lu,Shu-Xian Wang,Xiao Chen,Qin-Qin Xiang,Yi-Xin Hua
The electrodeposition behavior of Fe was studied in phenyltrimethylammonium chloride-ethylene glycol eutectic-based ionic liquids (TMPAC-EG EILs) containing FeCl2 through electrochemical measurement and the deposit characterization. Some kinetic parameters (standard rate constants, transfer coefficients and activation energy for standard rate constants) as well as transport properties were obtained and discussed as function of temperature. The values of transfer coefficient (0.32–0.39) are significantly lower than conventional value (0.5). Electrodeposition of Fe follows three-dimensional progressive nucleation and growth mode, which is unaffected by temperature. Besides, it is found that deposition temperature plays a central role in controlling surface morphology and structure of the resultant Fe coatings. At low temperature (333–353 K), smooth and dense iron coating can be obtained. The phase structure changes from a nanocrystalline α-Fe to amorphous phase (metallic glass) as the deposition temperature increases from 333 K to 353 K.
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FUEL
·
2022
·
IF 8.035
Baicheng Feng,Zichen Zhang,Jiaqiang Wang,Donglin Yang,Qun Li,Yaping Liu,Hengjun Gai,Tingting Huang,Hongbing Song
The catalytic hydrogenation of carbon dioxide (CO 2 ) into formic acid is among the most important reactions to alleviate global warming and realize the carbon cycle. How to achieve rapid activation of CO 2 remains a challenge. In this work, we designed two novel hydrophobic poly(ionic liquid)s (PILs) with a good affinity for CO 2 . Since the abundant N atoms in the PILs can anchor palladium (Pd) nanoparticles, the designed catalyst can rapidly activate CO 2 and H 2 simultaneously, thus efficiently catalyzing the hydrogenation of CO 2 to formic acid under mild conditions. Due to the synergy from the bis(trifluoromethanesulfonyl)amide anion ([Tf 2 N − ]) with strong hydrophobicity and CO 2 affinity and trimethylamine (NEt 3 ) as a low dissociation energy alkaline additive, the resultant Pd/PIL-bip-Tf 2 N exhibited the best catalytic performance on the hydrogenation of CO 2 to formic acid. The TOF value reached 1,190 h −1 in the aqueous solution of NEt 3 at 100 °C, 1 h, and a total pressure of 4 MPa. The activation energy and dissociation energy during the catalytic process were calculated by DFT, indicating that the synergistic effect of NEt 3 is better than that of other alkaline additives. In addition, the catalytic activity of the catalyst remained stable after several cycling experiments. Based on the obtained results, we proposed a possible reaction pathway. Therefore, PILs have great potential as catalyst carrier material for CO 2 hydrogenation.
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Journal of CO2 Utilization
·
2022
·
IF 8.321
Yichao Wang,Yifan Liu,Qian Su,Yunong Li,Lili Deng,Li Dong,Mengqian Fu,Shuaifei Liu,Weiguo Cheng
Carbon dioxide (CO 2 ) is an important C1 resource, and the preparation of cyclocarbonate by catalyzing CO 2 and epoxides is a nature-friendly route to utilize. In this study, polymer ionic liquid materials (PILMs) were prepared by copolymerizing the vinylimidazole-based ionic liquids (ILs) as monomer with carbonyl-rich copolymer monomer methyl methacrylate (MMA) and crosslinking agent ethylene glycol dimethacrylate (EGDMA), to enhance the affinity of PILMs for CO 2 and PO . Then, epoxides and CO 2 were converted to cyclic carbonates using PILMs by the gas-liquid reaction (GLR) and the gas phase-conversion progress (GCP). Amongst those polymer ionic liquid materials, the PILM containing carboxypropyl group (PILM-VCPImBr) exhibited the performance with the propylene carbonate (PC) yield of 96.7% (at 130 °C, 3 MPa CO 2 , reaction time 3 h) by GLR. And the yield of PC reached 94.2% (at 130 °C, 2 MPa CO 2 , reaction time 3 h) by GCP, which was the same as that of GLR. The excellent catalytic activity can be attributed to the fact that the PILMs fully dispersed the active sites and were rich in pores, which could effectively catalyze propylene oxide (PO) and CO 2 to generate PC. Finally, 1 H NMR spectra showed that VCPImBr and PO formed strong hydrogen bonds to participate the ring-opening process of epoxides, and a possible catalytic mechanism of H-bond synergistic effect was proposed. This article provides a novel strategy for designing both stable and nature-friendly catalysts in the CO 2 transformation, and proposes a new method for cyclic carbonate conversion.
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高影响因子
FUEL
·
2022
·
IF 8.035
Wenqiang Liu,Yajuan Wang,Juan Zhang,Qingwen Shan
Large particle spherical poly-ionic liquid–solid base catalyst (PILs-FL) was synthesized by suspension polymerization. This catalyst was characterized by SEM-EDS, T.G., FT-IR and BET-BJH. The characterization results show that PILs-FL has a specific core structure, a certain size of surface area (168.7 m 2 /g), pore size(6.3 nm), and high alkalinity (2.6 mmol/g). The catalyst performance was evaluated by vinyl carbonate and methanol reaction to form dimethyl carbonate (DMC). The reaction conditions were optimized in detail. The optimal reaction conditions were that the molar ratio of methanol and ethylene carbonate 9:1, catalyst dosage 3 wt%, reaction time 5 h, and temperature 90 °C, The yield of DMC was up to 93.7% under the optimal reaction conditions. In addition, The catalyst is separated very easily by simple filtration. The catalyst activity hardly decreased after being reused five times, and the catalyst shape was not destroyed, which meant that the catalyst had a high mechanical strength.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chong Chen,Huijuan Wang,Nengjie Feng,Yunlong Wang,Hui Wan,Jun Ma,Guofeng Guan
A ternary copolymerized poly(ionic liquid) of bis-imidazolium-based ionic liquid and crosslinking agents (divinylbenzene (DVB), N, N′-methylene bisacrylamide (MBA)) was rationally designed as versatile precursor to synthesize nitrogen-doped porous carbons by self-templating method for efficient CO 2 separation. The ionic liquid monomer and MBA could serve as nitrogen sources to enhance the surface polarity through in-situ doping, while the self-decomposed functional groups (especially -CONH-) along with halogen anions could promote the formation of pores during carbonization . By adjusting the molar ratio of ionic liquid to DVB and MBA, carbonization temperature and activator dosage (KOH), the obtained CVDM 0.5 -700 (0.5:1:1, 700 °C, 2 mol/L) owned a considerable specific surface area (1835 m 2 /g), plentiful (ultra)micropores and moderate nitrogen content (3.05 wt%). The strong van der Waals force arising from ultra-micropores (d<0.7 nm) within a narrow distribution improved the ability to capture CO 2 and the abundant CO 2 -philic N species further strengthened the binding interactions. Consequently, CVDM 0.5 -700 was endowed with satisfactory CO 2 uptake capacity (4.11 mmol/g), desirable CO 2 /N 2 (15%/85%) adsorption selectivity (23.6) and excellent cyclic stability at 25 °C and normal pressure. This work provided a new pathway for the modulated fabrication of heteroatoms-doped porous carbon materials by precise design of poly(ionic liquid)-based precursors for appealing applications.
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