INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Kuiyuan Cao,Fang Yang,He Wan,Xixin Duan,Junyou Shi,Zhong Sun
Ethyl vanillate (EV) is an important component of flavors and fragrances and has been widely used in the food, pharmaceutical, and cosmetic industries. The highly selective preparation of EV from lignin, the most abundant monophenolic compound in nature, is a great challenge in the field of lignin depolymerization. In this study, the multi-active catalysts from alkaline ionic liquid and polyoxometalates were constructed, which were characterized by acidity, alkaline and oxidizing ability. They can efficiently cleave the C C and C O bonds of larch lignin in an ethanol/water system at 160 °C for 10 h with H 2 O 2 as an oxidizing agent. Vanillin and EV were main products with the phenolic yield of 10.14 wt% and the selectivity of EV was up to 83.63 %. The depolymerization of phenolic and non-phenolic lignin model compounds demonstrated that the cleavage of β -O-4 and C α -C β bonds contributed to the selective preparation of EV in the catalytic system. The catalyst can be recycled up to 4 times with excellent stability and recoverability. This study provides a new approach for the production of EV, which is promising in the high-valued utilization of larch waste.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wei Liu,Shilong Cai,Hefeng Zhang,Yifu Huang
The presence of well-conductive polydimethylsiloxane (PDMS)-based ionogel has changed the stereotype of PDMS of being an insulator, owing to continuous ionic liquid (IL) phase with superior ionic conductivity. However, the sacrifice on the transparency of ionogel often occurs if increasing IL content, and to overcome the immiscibility between nonpolar PDMS and polar IL is still regarded as a considerable challenge today. Herein a new strategy to prepare a transparent, highly conductive PDMS-based ionogel with high IL content is proposed, using a “composite” surfactant of KF-6017 and LiTFSI. Benefited from unique microphase separation during gel formation, the optimal ionogel of IG 70%–1%–1% can possess excellent transparency (>95%, ~200 μm) with IL content of 70%, while owning ionic conductivity of 3.28 mS/cm and tensile property of 100 kPa. A new mechanism on the conductivity of ionogel is proposed by the molecular simulation. The ionogel can be suitable for applying as electrolyte (B) and a polymer binder for active carbon powders (as electrode A). As a result, the assembled electrochemical double-layer capacitor (A/B/A) can be flexible accompanied with excellent electrochemical performance, which exhibits a promising future for flexible electronics and wearable devices.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jingqi Yang,Ying Lu,Jun Geng,Shuping Xue,Yixuan Zhang,Jingyi Teng,Maochun Zhu,Xue Bai,Shuxia Liu
The design and preparation of proton exchange membranes (PEMs) with wide working temperature ranges play a crucial role in expanding their application, but most of the reported PEMs are difficult to meet the demand for operating at subzero temperatures. Herein, a series of composite membranes have been successfully fabricated by functionalizing a sulfonated poly(ether ether ketone) (SPEEK) membrane with phosphotungstic acid-ionic liquid (HPW-IL) and mesoporous graphite phase carbon nitride (mpg-C3N4). Notably, the optimal composite membrane SPEEK/HPW-IL/mpg-C3N4-1.0 exhibits attractive antifreeze property (<−75 °C) and great proton conductivity ranging from −40 °C (7.2 × 10–4 S cm–1, ambient humidity) to 85 °C (2.2 × 10–1 S cm–1, 95% RH) attributing to the formation of continuous proton transport channels induced by the double acid–base pairs (one is HPW and IL, the other is SPEEK and mpg-C3N4) and abundant hydrogen-bonding interactions among various components. Meanwhile, its antiswelling property has been greatly improved compared to the SPEEK membrane, thanks to the incorporation of mpg-C3N4. Given its excellent proton conductivity, a full-cell performance test was performed, achieving a maximum output power density of up to 230.3 mW cm–2, an open-circuit voltage of up to 0.85 V, and a long-term stability for 25 h at 80 °C, 100% RH. This work provides broad vision into the design of PEMs with remarkable performances that can be used in a wide temperature range.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ye-Ting Wang,Qing-Ping Zheng,Yu Chai,Yu-Cang Zhang,Yan-Zhen Zheng
In this study, an efficient and environmentally friendly pretreatment system was developed by combining the biocompatible ionic liquid choline levulinate (ChLA) with monoethanolamine (MEA) to enhance the fractionation and valorization of tea stems (TS). Under optimized conditions (140 °C, 2 h, 20 % water content, ChLA:MEA molar ratio of 1:2), the system achieved high retention of cellulose (89.2 ± 1.4 %) and hemicellulose (76.6 ± 1.4 %), alongside substantial lignin removal (76.9 ± 0.7 %). Spectroscopic and morphological analyses (FTIR, XRD, SEM) confirmed effective disruption of the lignin-carbohydrate complex, a reduction in cellulose crystallinity, and enhanced substrate accessibility. Consequently, enzymatic hydrolysis of the pretreated biomass yielded glucose and xylose at 93.7 ± 0.6 % and 85.7 ± 0.7 %, respectively, representing a more than 212 % improvement in saccharification efficiency compared to untreated TS. Furthermore, the pretreatment selectively cleaved lignin-carbohydrate ester linkages, enabling the recovery of lignin nanoparticles (LNPs) characterized by a high β-O-4 linkage content, low condensation degree, and low molecular weight. These LNPs were incorporated into polyvinyl alcohol (PVA)-based nanocomposite films, which exhibited improved mechanical properties, hydrophobicity, and UV-shielding performance. Overall, this work presented a sustainable and integrated strategy for the comprehensive utilization of lignocellulosic biomass into high-value multifunctional materials.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jingna Li,Wei Zhang,Yaming Sun,Chenchen Song,Hailiang Zhao,Yangyong Lv,Yuansen Hu,Shusheng Zhang,Lijun He
Early warning detection based on aflatoxin B 1 (AFB 1 ) biosynthesis precursors is an effective strategy for the prevention of AFB 1 contamination. However, the development of effective methods for accurately tracking the dynamic changes of AFB 1 and its precursors presents a major challenge. This difficulty is due to the continual variations in precursor species and concentrations, structural differences of AFB 1 and its precursors, as well as the complexity of the dynamically changed sample matrix. Herein, an ionic liquid-impregnated covalent triazine polymer composite (IL@CTP) was fabricated, which exhibited excellent extraction performance for structurally different AFB 1 and its three typical precursors in moldy grains. The high performance was attributed to the multiple interactions between the prepared composite and analytes, as well as a mesopore filling effect. The combined use of IL@CTP with dispersive solid-phase extraction and ultra high-performance liquid chromatography-mass spectrometry achieved negligible matrix effects, with low limits of detection (0.01–0.03 ng/g), wide linearity (0.06–200 ng/g) and satisfactory relative recoveries of 85.3 %-113.0 %. Therefore, the developed method can accurately track the dynamic changes of AFB 1 and its precursors in stored maize inoculated with Aspergillus flavus . Correlation analysis between AFB 1 and its precursors showed that it was necessary to simultaneously serve averantin, O-methylsterigmatocystin and sterigmatocystin as early warning molecules, allowing the accurate identification of AFB 1 contamination risks up to 5 days in advance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Xiongwei Luo,Xijun Xu,Fangkun Li,Shaomin Ji,Weizhen Fan,Jingwei Zhao,Jun Liu,Yanping Huo
Polyethylene oxide (PEO) electrolytes have been extensively researched in solid-state batteries due to their excellent interface compatibility, high flexibility, and ease of machining. However, its practical application is still hindered by low ionic conductivity (∼10 −6 S cm −1 at room temperature) and a narrow electrochemical stability window. To settle these shortcomings, a PEO-based composite electrolyte enabled by active LiGaO 2 filler and 1-allyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide (AMIm-TFSI) ionic liquid is constructed for lithium metal batteries (LMBs). Benefiting from the synergistic effect of LiGaO 2 filler and AMIm-TFSI ionic liquid, this composite electrolyte not only enhances the ionic conductivity (2.08 × 10 −3 S cm −1 ) and electrochemical window (5.2 V vs. Li + /Li) but also reduce the interfacial impedance. Furthermore, the Li//Li symmetric cells achieved an ultralong lithium deposition/stripping cycle over 1000 h at 0.1 mA cm −2 . The assembled solid-state LiFePO 4 //Li cell exhibit superior rate capability (164.2, 158.5, 154.8, 148.6, 119.4 mAh g −1 at 0.1, 0.2, 0.5, 1, and 2 C, respectively) and excellent cycling stability (147.3 mAh g −1 after 300 cycles at 0.2C). The X-ray photoelectron spectroscopy (XPS) analysis reveals that the composite electrolytes in situ form an inorganic-rich solid electrolyte interface layer. This work provides guidance on designing superior organic-inorganic composite electrolytes for LMBs.
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 24
·5341-5346
·
IF 4.857
Jing Yang,Rou Tan,Di Li,Jianmin Ma,Xiaochuan Duan
Graphical Cathode materials : Porous LiFe 0.4 Mn 0.6 PO 4 /CNF free-standing electrodes have been successfully prepared through a facile ionic liquid assisted electrospinning method. Owing to the hierarchical porosity and N-doped carbon layer derived from ionic liquid, the resulting electrodes exhibit superior electrochemical performances with the improvement of conductivity and pseudocapacitive contribution (see figure). In pursuit of high-performance cathode materials for lithium-ion batteries with high energy and power densities, porous LiFe 0.4 Mn 0.6 PO 4 /CNF free-standing electrodes have been successfully prepared through a facile ionic liquid (IL) assisted electrospinning method. Owing to the hierarchical porosity and N-doped carbon layer derived from the ionic liquid, the resulting electrodes exhibited superior electrochemical performances with an improvement of conductivity and pseudocapacitive contribution, delivering a discharge capability of 162.7, 133.5, 114.5, and 102.6 mAh g −1 at the current rates of 0.1, 1, 5, and 10 C, respectively. It is highly expected that this facile IL-assisted electrospinning method will lead to further developments for other phosphate-based free-standing electrodes, which offers a new route in designing polyanionic cathodes for high-performance Li-ion batteries.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2018
·Vol. 29
·期 7
·1455-1463
·
IF 1.444
Yang Aihong,Zhang Shun,Zhang Lei,Zhong Jingjing,Kou Xiaodi
Both Shuang-Huang-Lian and Xue-Bi-Jing injections are clinically proven efficient and low cost medicines. However, the studies of their chromatographic separation are limited. In this study, a column based on ionic liquid stationary phase was applied for the first time for the analysis of these two injections. For Shuang-Huang-Lian injection, U-shaped plots of retention factors vs. mobile phase constitutions were obtained. This unique kind of separation behavior allowed a flexible adjustment of retention by tuning the mobile phase constituents. Then acids group was analyzed with hydrophilic chromatography mode, while glycosides group was analyzed with reversed phase chromatography mode. Similarly, constituents in Xue-Bi-Jing injection were analyzed with mixed mode high performance liquid chromatography (HPLC). Higher, medium and lower polarity groups were analyzed with hydrophilic interaction, reversed phase and normal phase liquid chromatography modes, respectively. Results from this work provided valuable information for the separation of complicated systems such as traditional Chinese medicine injections.
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2017
·Vol. 19
·期 20
·4838-4848
·
IF 9.125
Gang Wang,Yiming Xu,Suojiang Zhang,Zengxi Li,Chunshan Li
A one-pot synthesis of α,β-unsaturated esters from unactivated esters and aldehydes using strong bases, such as sodium alkoxide and potassium tert-butoxide, was reported. However, the ionic liquid (IL) catalyzed probase method for producing α,β-unsaturated esters was not reported until now. In this work, a series of ILs with fluoride anions were firstly prepared and used as catalysts in combination with the probase N,O-bis(trimethylsilyl) acetamide (BSA) for the α,β-unsaturated esters synthesis. This process could also be promoted through the introduction of another IL with Lewis acid sites. The yield and selectivity of the product could reach up to 84.2% and 95.0%, respectively, when [Bmim]F was used in combination with [Bmim]Cl/AlCl3 (the molar fraction of AlCl3 is 0.67). The mechanism investigation through GC-MS indicates that BSA would convert into onium amide, which acted as a strong base for α-H abstraction, with the catalysis of [Bmim]F. Meanwhile, [Bmim]Cl/AlCl3 played an important role in the condensation step between enolates and aldehydes. On the basis of mechanism insights, kinetic and thermodynamic studies were also carried out for a better understanding of this new route.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Zhen Jiao,Mengnan Zhang,Lixia Yang,Yuxuan Wang,Jiajie Fu
To evaluate the feasibility of extraction of 1-methylimidazole from its low-concentration aqueous solution by ionic liquids, the liquid–liquid equilibrium of the ternary system of water + 1-methylimidazole + ionic liquid ([Hmim][PF6], [Omim][PF6], or [Omim][BF4]) was determined at 303.15 K and atmospheric pressure. The distribution coefficient and selectivity were calculated in accordance with the experimental results. The effects of the anion and cation of ionic liquids on the separation ability were discussed. The results indicated that the extraction capacity increased with increasing cationic carbon chain length, and the change of anions significantly affected the distribution coefficient and selectivity. As expected, the three ionic liquids were feasible as extractants for separating 1-methylimidazole from water. It also indicated that [Omim][PF6] was a more suitable extractant than [Hmim][PF6] and [Omim][BF4] for the extraction. The highest distribution coefficient and selectivity of [Omim][PF6] could reach 1.71 and 111.92, respectively, indicating [Omim][PF6] as a good choice for extracting 1-methylimidazole from water. In addition, the non-random two-liquid model was employed to successfully correlate the experimental data with a root-mean-square deviation of less than 0.0188. Moreover, a GUI-MATLAB tool was used to verify the consistency of the correlated parameters.
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Xue Lv,Song Tian,Chuang Liu,Li-Lin Luo,Zhu-Bao Shao,Shu-Lin Sun
Hydrogel wearable sensors with multifunctional characteristics are highly desirable in the development of the current environment. Besides the constant concern of high conductivity and good mechanical properties, antibacterial properties and self-healing capability are also essential to hydrogel strain sensors. Herein, inspired by the purslane, the multifunctional hydrogel sensors (p(AAm/DMLB)/IL-LPs/c-MWCNTs) were mainly constructed by the copolymerization of dimethylaminoethyl methacrylate (DMLB) and polyacrylamide p(AAm) without adding external antimicrobial agents in a facile strategy. The results exhibited DMLB could contribute not only the antimicrobial properties, but also interact with the carboxyl-functionalized multi-walled carbon nanotubes (c-MWCNTs) and ionic liquid (IL)-latex particles (LPs) by hydrogen bond cross-linking and physical entanglement, respectively, which significantly enhanced the mechanical strength and resilience of the hydrogel sensors. Notably, without adding inorganic salt, the obtained hydrogel sensors owned a wide spectrum of sensory properties and high strain sensitivity (gauge factor = 12.71 at 100–1100%, quick response = 500 ms) owing to the synergistic effect between IL and c-MWCNTs. Moreover, the hydrogel sensors exhibited anti-piercing for efficient energy dissipation, together with self-healing properties. Therefore, the integration of self-healing, conductive and antibacterial hydrogel-based strain sensors will display broad application in sophisticated intelligence, soft robotics, bionic prosthetics, personal health care, and other fields using inexpensive, green, and easily available biomass.
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2013
·Vol. 180
·期 13
·1325-1332
·
IF 3.434
Wu Ying,Feng Xun,Zhou Shenghai,Shi Hongyan,Wu Hongmin,Zhao Shujie,Song Wenbo
We report on a sensor for epinephrine (EP) that is based on an ITO electrode modified with multi-walled carbon nanotubes pre-coated with a polymerized ionic liquid (PIL-MWNTs). A chitosan film was then electrodeposited on the ITO electrode in the presence of EP (the template) and the PIL-MWNTs. This film acts as an excellent recognition matrix due to its excellent film-forming ability and the many functional groups that favor hydrogen bond formation with the target (EP). The PIL-MWNTs, in turn, can improve the sensing performance due to their good electrical conductivity, high dispersity, and large surface area. The imprinted films were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform IR spectroscopy, and thermogravimetric analysis. The electrochemistry of the imprinted electrode was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, differential pulse voltammetry and chronoamperometry. The response to EP is linear in the 0.2 μM to 0.67 mM concentration range, and the detection limit is as low as 60 nM (at an S/N of 3). The electrode is reusable and offers good reproducibility and stability.
An epinephrine imprinted electrode was facile achieved by electrodepositing chitosan on ITO surface in the presence of epinephrine and polymerized ionic liquid-functionalized carbon nanotubes, followed by removal of the epinephrine template molecule. Specific recognition of EP molecule and its determination were realized at this imprinted sensor.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）