MACROMOLECULES
·
2025
·
IF 5.2
Haodong Huang,Ziqi Wang,Zhen Zhang,Chongyang Wang,Yanping Liu,Chuntai Liu,Chunguang Shao,Zhen Wang
Exploring milder high-pressure processing conditions is essential for developing heat-resistant electroactive poly(vinylidene fluoride) (PVDF) materials based on polar extended-chain crystals (ECCs). Herein, we introduced a typical imidazole ionic liquid (IL), 1-ethyl-3-methylimidazolium tetrafluoroborate, to manipulate the melt crystallization of PVDF under high pressure. Our findings reveal a dual role of IL in ECCs formation through various structural and morphological characterizations. First, it increases the free energy of growing nuclei by raising the end surface free energy σe, making ECCs formation thermodynamically unfavorable. Second, it facilitates chain sliding diffusion and lowers the diffusion activation energy during nuclei growth, which promotes ECCs generation in kinetics. These two effects compete with each other, influenced by crystallization conditions and IL content. Kinetic promotion prevails at low crystallization temperatures (Tp) and low IL fractions, while thermodynamic inhibition dominates at high Tp and/or high IL fractions. This interplay is illustrated by high-pressure phase diagrams of PVDF/IL blends. A low IL fraction (e.g., 0.2%) significantly expands the ECCs growth region into lower Tp and pressure conditions, while a higher IL fraction has the opposite effect. This knowledge enables the rapid preparation of abundant ECCs with minimal IL addition at milder low temperatures, thereby minimizing sample degradation. Furthermore, the IL-induced ECCs primarily consist of the polar β-phase and maintain a high melting point. This study elucidates the high-pressure crystallization mechanism of PVDF/IL blends and proposes an effective strategy for enhancing the production of polar ECCs in PVDF homopolymer.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 9
·3667-3676
·
IF 3.269
Hanbing Rao,Zhaoyi Zhang,Hongwei Ge,Xin Liu,Ping Zou,Xianxiang Wang,Yanying Wang
In our work, a NiCo2O4/nitrogen-doped reduced graphene oxide/ionic liquid (NiCo2O4/N-rGO/IL) nanocomposite was prepared using hydrothermal treatment and calcination followed by a facile reaction with stirring. The composite material was characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), FTIR spectra and thermogravimetric analysis (TGA). The biosensing properties of NiCo2O4/N-rGO/IL, NiCo2O4/N-rGO and NiCo2O4 towards glucose were studied based on a glassy carbon electrode. The NiCo2O4/N-rGO/IL nanocomposite exhibits excellent electrocatalytic activity towards glucose, with a sensitivity of 3.76 mA mM−1 cm−2 and a good linear response from 0.001 mM to 4.555 mM at a potential of +0.5 V. The limit of detection can reach 0.18 μM. It also shows significant electrochemical sensitivity, reproducibility and long-term stability. The good electrocatalytic activity is attributed to the synergistic effect of the metal oxides, graphene oxide and the IL. The N-doping of rGO accelerates the electron transfer of the IL further and enhances its electrochemical properties. In addition, the sensor is effectively applied to the determination of glucose in a human blood serum sample.
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高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 6
·1-8
·
IF 5.705
Huang Huayu,Wang Mingxia,Wang Yang,Li Xinli,Niu Zhiying,Wang Xingyu,Song Jinxi
Molybdenum disulfide (MoS 2 ) was used as an electrically conductive skeleton and functionalized with an ionic liquid and gold/silver nanorods. The resulting composite was characterized by scanning electron microscopy, transmission electron microscopy and UV–vis spectroscopy. The composites were used to modify a glassy carbon electrode (GCE) to obtain a sensor for 2,4-dichlorophenol (2,4-DCP). The results show that the oxidation power and electrocatalytic activity of the modified GCE towards 2,4-DCP are enhanced compared to a bare GCE and other modified GCEs. Response is linear in the 0.01 to 50 μM 2,4-DCP concentration range, with a 2.6 nM detection limit. The sensor is highly sensitive and long-term stable. It was successfully applied to the determination of 2,4-DCP in spiked water samples and gave satisfactory recoveries.
Schematic of an electrochemical sensor for the differential pulse voltammetric (DPV) determination of 2,4-dichlorophenol. It is based on the use of an MoS 2 -ionic liquid-Au/Ag nanorod composite.
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PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2012
·Vol. 18
·期 19
·5954-5969
·
IF 5.925
Meng He,Peng Huang,Chunlei Zhang,Jiebing Ma,Rong He,Daxiang Cui
Graphical Two-phase synthesis : A facile, user- and environmentally friendly ( n -octanol-induced) oleic acid (OA)/ionic liquid (IL) two-phase system for the phase- and size-controllable synthesis of small (<50 nm) water-soluble hexagonal rare earth (La, Gd, and Y) fluoride nanocrystals with uniform morphologies is described (see figure). Herein, we introduce a facile, user- and environmentally friendly ( n -octanol-induced) oleic acid (OA)/ionic liquid (IL) two-phase system for the phase- and size-controllable synthesis of water-soluble hexagonal rare earth (RE=La, Gd, and Y) fluoride nanocrystals with uniform morphologies (mainly spheres and elongated particles) and small sizes (<50 nm). The unique role of the IL 1-butyl-3-methylimidazolium hexafluorophosphate (BmimPF 6 ) and n -octanol in modulating the phase structure and particle size are discussed in detail. More importantly, the mechanism of the ( n -octanol-induced) OA/IL two-phase system, the formation of the RE fluoride nanocrystals, and the distinctive size- and morphology-controlling capacity of the system are presented. BmimPF 6 is versatile in term of crystal-phase manipulation, size and shape maintenance, and providing water solubility in a one-step reaction. The luminescent properties of Er 3+ -, Ho 3+ -, and Tm 3+ -doped LaF 3 , NaGdF 4 , and NaYF 4 nanocrystals were also studied. It is worth noting that the as-prepared products can be directly dispersed in water due to the hydrophilic property of Bmim + (cationic part of the IL) as a capping agent. This advantageous feature has made the IL-capped products favorable in facile surface modifications, such as the classic Stober method. Finally, the cytotoxicity evaluation of NaYF 4 :Yb,Er nanocrystals before and after silica coating was conducted for further biological applications.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Yingyuan Wei,Sandile Fakudze,Yu Zhang,Min Song,Tianjiao Xue,Ruiyan Xie,Jianqiang Chen
Ionic liquid loaded ZSM-5 with high stability and catalytic performance was used for hydrothermal liquefaction (HTL) of pomelo peel for the first time. Bio-oil obtained at 200 °C had the highest yield (29.21 wt%) and high heating value (21.41 MJ/kg), with main constituents of 5-hydroxymethylfurfural (5-HMF, 50.10%), 3-Pyridinol (19.8%) and pentanoic acid (5.35%). The higher 5-hydroxymethylfurfural yield obtained using ionic liquid loaded ZSM-5 was further compared to other studies (0–50%). In comparison to high-temperature HTL, catalytic HTL with ionic liquid loaded ZSM-5 led to lower activation energy requirements (31.93 kJ·mol −1 ) for the conversion of glucose into 5-HMF. Additionally, the catalysts showed excellent recyclability, with 19.68 wt% of bio-oil containing 59.6% of light oil obtained after 5 cycles. Hence, this study presents a novel approach for the catalytic conversion of lignocellulosic biomass into 5-HMF-rich bio-oil for energy and green chemistry applications.
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PubMed
高影响因子
IONICS
·
2018
·Vol. 25
·期 6
·2781-2789
·
IF 2.347
Chen Yujuan,Sun Li,Lu Zhiwei,Liu Zhaoen,Jiang Yuyang,Zhuo Kelei
In this paper, nitrogen and sulfur co-doped graphene aerogel (NS-GA) was successfully prepared using ionic liquid 1-(4-mercaptobutyl)-3-methylimidazolium bromide (HS-BMIMBr) as both reductant and dopant by a one-step hydrothermal method. The results of X-ray diffraction indicate that the doping of heteroatoms into graphene increases its degree of defects. In addition, scanning electron microscopy measurements and nitrogen adsorption–desorption analysis reveal that the as-prepared NS-GA has unique hierarchical porous nanostructures, which supply efficient networks for ionic transports and electron transfer. The symmetric electrical double-layer capacitors (EDLCs) based on the NS-GA with ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, EMIMBF 4 ) as the electrolyte show excellent capacitive performance. And the NS-GA has a high specific capacitance of 182.3 F g −1 at a current density of 1 A g −1 . Moreover, there is a high energy density of 101 Wh kg −1 at a power density of 1 kW kg −1 . Therefore, the NS-GA can be considered as a favorable electrode material for high-performance energy storage devices.
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xingzhe Shao,Ruiling Wu,Jinyu Zhou,Jun Zhang,Jinghui Wang,Songbo Jiao,Yating Zhang,Zhibing Wang,Zhen Wang,Fengqing Zhang
The illegal addition of drugs to health foods posed significant risks to consumer safety, prompting an urgent need for reliable monitoring methods. A simple, green, efficient dual-surfactant supramolecular solvent dispersion liquid-liquid microextraction coupled with high performance liquid chromatography (SUPRAS-DLLME-HPLC) method was developed to determine four sulfonylurea hypoglycemic drugs (glibenclamide, gliclazide, glimepiride, gliquidone) in health food. A low-viscosity, high-density supramolecular solvent (SUPRAS) was prepared from 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([BMIM][TFSI]) and sodium dodecyl sulfate (SDS) by vortex-assisted two-step self-assembly. The incorporation of SDS into [BMIM][TFSI] significantly enhanced the SUPRAS extraction efficiency, and the surface morphology, microstructure, and physicochemical properties of SUPRAS were subsequently characterized. The four analytes showed good linearity (R 2 > 0.9994) in the range of 7.8–2000 μg kg −1 , with limits of detection and limits of quantification of 1.14–2.40 μg kg −1 and 3.82–8.03 μg kg −1 , respectively. The present method provided a practical and green solution for identifying illegal additives in health food.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Pengpeng Fan,Junfeng She,Dongao Zhu,Jing He,Jing Zhang,Chunyan Dai,Wenshuai Zhu,Wei Jiang
The development of high-performance oxidative desulfurization (ODS) catalysts is often hindered by inefficient mass transfer across oil-water-solid interfaces and a reliance on complex multi-step syntheses. While surface hydrophobization is a recognized solution, existing methods lack simplicity and precision. This study introduces a fundamental advance: a one-pot in-situ strategy to precisely engineer the wettability of bismuth molybdate (BMO) by forming a protic ionic liquid (PIL) coating from oleic acid (OA) and oleylamine (OLA). The water contact angle of hydrophobic BMO could be controllably tuned from 27.8° to 104.9° by increasing the content of OA and OLA. Comprehensive characterizations confirm the successful formation and incorporation of PIL without altering the crystal structure. The optimized hydrophobic BMO achieved complete removal of dibenzothiophene within 30 min under mild ODS conditions, and also exhibited high selectivity and good recyclability. Mechanistic studies indicated that peroxomolybdate species rather than free radicals are the active intermediates. This work provides a promising strategy for the hydrophobic modification of hydrophilic metal oxides and the construction of efficient heterogeneous catalytic systems.
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高影响因子
POLYMER
·
2022
·
IF 4.432
Yu Li,Yuchi Liu,Lingyu Liu,Xiaopeng Zhao,Jianbo Yin
Solvent-free double network elastomers have excellent mechanical properties and stability. However, there are few studies on ion transport in solvent-free double network elastomers. In this paper, we prepared a kind of poly(ionic liquid) (PIL)-based solvent-free elastomer with double network structure by using crosslinked poly[2-(methacryloyloxy)ethyl] trimethyl ammonium bis(trifluoromethanesulfonyl) imine (P[VBTMA][TFSI]) network as brittle network and crosslinked poly(ethyl acrylate) (PEA) as stretchable network. The mechanical properties and the ion transport of samples as a function of elongation strain were investigated by stress-strain curves and broadband dielectric spectroscopy , respectively. The results show the double network elastomer has medium elastic modulus of 0.4–0.9 MPa, high elongation strain of 1700–2300% and ionic conductivity of 1.04 × 10 −7 S·m −1 at room temperature . When the sample does not yield, stretching almost does not affect the ion transport in the network. As the strain exceeds the yield point, the conductivity relaxation time of the samples with low crosslinking degree of PIL network increases little, while the conductivity relaxation time of the samples with high crosslinking degree increases significantly. This is because the former network breaks uniformly, while the latter appears phase separation when yielding. The result improves the understanding of ion transport in double network polyelectrolyte elastomers.
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高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 19
·7875-7882
·
IF 1.938
Jing Jia,Shujuan Liu,Yong Guo,Shuai Wang,Xia Liu
In this work, a nanoporous array anodic titanium was selected as a fiber substrate because of its high surface-to-volume ratio, easy preparation, mechanical stability, and rich titanol groups on its surface that can anchor other active groups. Then, a polymerizable ionic liquid monomer pair, (1-vinyl-3-hexadecylimidzolium)-(p-styrenesulfonate) ([C16VIm]+SS−), was synthesized and used for the chemical modification of the mercaptopropyl-functionalized nanoporous anodic titania support using a surface radical chain-transfer addition. A homogeneous and porous coating with a thickness of about 7 μm was achieved. The main advantage of this copolymerization method over the conventional single-ion polymerization is its high stability under harsh conditions, like high temperatures, as well as acidic, alkaline and high ionic strength solutions. Combined with gas chromatography-a flame ionization detection (GC-FID), the poly[C16VIm]+SS− was used as a sorbent material for the direct immersion SPME of four types of compounds, including polycyclic aromatic hydrocarbons, hydrophobic phenols, non-volatile phthalate esters and parabens, in an aqueous solution. The analytical performance of the proposed method was investigated under the optimum extraction conditions (content of NaCl, 20% (w/v); extraction temperature, 70 °C; and extraction time, 55 min). Calibration ranges were 0.1–400 μg L−1 for four hydrophobic phenols, anthracene (Ant) and fluoranthene (Flt), 0.15–600 μg L−1 for dibutyl phthalate (DBP) and di-(2-ethyl-hexyl) phthalate (DEHP), and 0.5–2000 μg L−1 for ethylparaben (EPN) and propylparaben (PPN). The as-established method showed good linearity with good correlation coefficients (R = 0.993–0.999) and low detection limits in the range of 0.003 to 0.156 ng mL−1 (S/N = 3). In addition, the poly[C16VIm]+SS−-SPME fiber showed good precision (3.2–13.5%) and repeatability between fiber and fiber (9.1–19.6%). Finally, soil extract sample were analyzed and satisfactory results were obtained.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Huizhen Chen,Xiaodong Huang,Zhanyi Jin,Yang Li
Covalent organic frameworks (COFs) are novel two dimensional materials with wide application potential in gas adsorption and separation, energy storage and conversion, chemical and biosensors, etc. Herein, COF loaded with poly(ionic liquid) (PIL) was prepared and employed to fabricate a humidity sensor. Specifically, the COF was obtained by interfacial polymerization of tris(4-formylphenyl) amine with 1,3,5-triformylbenzene, and loaded with the PIL via in-situ polymerization of 1-butyl-3-vinylimidazolium tetrafluoroborate under UV irradiation. The PIL@COF sensor exhibited very quick response (t 90% of 2 s for both adsorption and desorption), small hysteresis (relative humidity (RH) of 2%), relatively high sensitivity (impedance change for over one order of magnitude between 11% and 98%RH), high repeatability and good long-term stability. Large specific area of the COF with few polar groups and high content of ionic groups of PIL contributed to the high performance of the sensor. The PIL@COF sensor successfully realized contactless sensing of breath rate and speech recognition, non-contact generation of Morse code and contactless human-machine interactions. The work provides references for the application of COFs in advanced sensors.
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高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Xiaoqian Chang,Yunpeng Xu,Chun-Liang Hou,Ruihan Wang,Xiaoyang Chang
Upgrading plastic waste into high-value chemicals and achieving recycling is of great significance for sustainable development. Herein, we report a green, mild, solvent- and metal-free catalytic approach that uses hydroxyl-functionalized ionic liquids to induce the cleavage of C-O and O-H bonds in polyethylene glycol (PEG), successfully converting PEG into ethylene glycol diester. Through experiments, NMR analysis and DFT calculations, we find that the anion and cation of [HO-EtMIm][OTf] can respectively act as hydrogen bond acceptors and donors to activate the O-H and C-O bonds in PEG, as well as the C=O double bond in benzoic anhydride. Subsequently, the activated hydroxyl O atom in PEG can attack the carbonyl C atom in benzoic anhydride through nucleophilic action, and the activated O atom in benzoic anhydride can also attack the C atom in PEG through nucleophilic action, thereby undergoing depolymerization and forming new C-O bonds, ultimately generating the target product. This mechanism clearly demonstrates the importance of unique confinement effect of ionic liquids, which is achieved through spatial confinement, electrostatic stabilization, directional activation, and hydrogen bonding synergy, providing corresponding innovative support for future research.
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高影响因子
危险品化学品经营许可证（带存储）