ChemSusChem
·
2020
·Vol. 13
·期 7
·1906-1914
·
IF 7.962
Yuqi Ke,Jingzhu Zhang,Yuanbang Xie,Qiwei Yang,Qilong Ren,Huabin Xing
Graphical Flex those ABSs : Aqueous biphasic systems (ABSs) based on poly(ionic liquid)s (PILs) were designed and used for the extraction of bioactive compounds. Extraordinary partition coefficients were achieved by customizing the structure of the PILs. The performance of the PIL-based ABSs was tuned by changing the molecular weight and anionic character of the PIL. Ionic liquid (IL)-based aqueous biphasic systems (ABSs) provide a sustainable and efficient alternative to conventional liquid–liquid extraction techniques and can be used for the extraction, recovery, and purification of diverse solutes. However, the construction of a high-performance ABS that has both excellent phase separation ability and extraction performance remains challenging. This study concerns the preparation of a family of novel ABSs based on poly(ionic liquid)s (PILs) with customized structure and controllable molecular weight for the extraction of bioactive compounds. Several tailor-made PILs consisting of a hydrophobic backbone, hydrophilic imidazolium pendant groups and strong hydrogen bonding basic counteranions are prepared by reversible addition fragmentation chain-transfer polymerization. The PILs have a perfect balance of hydrophobicity/hydrophilicity and functionality, affording outstanding phase separation, which was better than with either the IL monomer poly(1-butyl-3-vinylimidazolium bromide ([BVIm]Br) or the normal free-radical polymer P[BVIm]Br*. More importantly, PIL-based ABSs exhibited unprecedented high partition coefficients for six bioactive compounds including tryptophan, phenylalanine, and caffeine, as well as high extraction yields. The performance of the PIL-based ABSs could also be tuned by changing the molecular weight and anionic character of the PILs. This work shows that tailor-made PIL-based ABSs are a promising platform for bioactive compound extraction and provides significant clues for the design of new ABSs for various applications.
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Journal of Energy Storage
·
2025
·
IF 9.8
Jingdi Shang,Libo Wang,Ying Gao,Ji’a Yang,Qixun Xia,Qianku Hu,Aiguo Zhou,Bo Wang
Due to its unique structure and performance, Ti 3 C 2 T x has been widely investigated as an electrode material for flexible energy storage devices using hydrogel as a solid electrolyte. The composition and structure of hydrogels determine their poor performance at high temperatures and there is little research on MXene flexible devices at high temperature. In this work, we designed a method for preparing capacitors with Ti 3 C 2 T x as the electrode material and ionic liquid as the electrolyte. By leveraging the high permeability of ionic polymer solution, a seamless electrode-electrolyte interface is constructed. The device can achieve a maximum capacitance of 173.8 mF cm −2 at a 5 mV s −1 scan rate, with a maximum specific energy density and power density of 96.57 μWh cm −2 and 1.74 mW cm −2 , respectively. The capacitor retains 89.5 % of its initial capacitance after 20,000 cycles, demonstrating excellent cycle stability. Importantly, the supercapacitor can operate at 100 °C with a specific capacitance of 278.66 mF cm −2 . In addition, the designed device can retains 100 % or more of its capacitance even after 1000 cycles of 180° bending，demonstrating robust mechanical performance. This work provides a reference for studying the application of MXene in high-temperature flexible supercapacitor.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shuohan Huang,Wenwen Zhang,Yuan Liang,Yao Zhang,Hai Wan,Yong He,Yanping Wang,Yumin Xia
The current methods of plastic production and disposal are unsustainable, presenting significant environmental risks. Although eco-friendly processing holds promise for mitigating these challenges, overcoming the associated technological obstacles remains a critical issue. Herein, we developed a hydroplastic material, PIL-Alg plastic, synthesized through the interaction of polyionic liquids (PILs) and sodium alginate. This material combines the inherent cation cross-linking of alginate with the anion-exchange properties of PILs, resulting in a highly adaptable plastic with excellent reshaping, recycling, and flame-retardant properties. PIL-Alg plastic demonstrates superior thermal stability, with a limiting oxygen index (LOI) of 28.5 and no melting behavior at elevated temperatures. Mechanical testing shows a tensile strength of 62.1 MPa, indicating robust performance. Unlike traditional biodegradable plastics, PIL-Alg does not require industrial composting and can be recycled without degradation. This work demonstrates the potential of PIL-Alg plastic as a sustainable, high-performance alternative to conventional plastics, aligning with circular economy principles.
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Journal of CO2 Utilization
·
2024
·
IF 7.2
Xinjuan Li,Yan Liu,Ao Li,Xuening Ma,Xianbin Jia,Yahao Dong
Constructing stable nanochannels and nanoconfined environments for ionic liquids holds significant application value in gas separation, ion channels, and related fields. The functional polyionic liquid synthesized in this study exhibits a controllable assembly structure and demonstrates liquid crystal properties. Through heating and water treatment, the polyionic liquids crosslink to form multi-hierarchical nanopores, including sub-nanochannels with pore sizes similar to CO 2 , without the need for a catalyst. The specific surface area and pore size of the polyionic liquid network (PILC) were adjusted by regulating the self-assembly of polyionic liquids in water. The unique PILC, combining ionic liquid nanopores and liquid crystal structure properties, shows high CO 2 adsorption performance and excellent CO 2 /N 2 selectivities, surpassing commonly reported ionic liquid porous materials. Furthermore, PILC-2 exhibits good catalytic performance for CO 2 cycloaddition, and its catalytic activity and selectivity did not significantly decrease after five cycles. This study successfully introduces hierarchical ionic liquid nanochannels into porous networks without involving any inorganic ordered nanomaterials. This provides a simple and effective approach for the highly selective adsorption and separation of CO 2 , as well as for the preparation of catalytic materials.
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ANALYST
·
2015
·Vol. 140
·期 16
·5585-5592
·
IF 4.107
Tingting Wang,Yihui Chen,Junfeng Ma,Xiaodan Zhang,Lihua Zhang,Yukui Zhang
In the current study, a novel ionic liquid-based zwitterionic organic polymer monolithic column was developed by copolymerizing 1-vinyl-3-(butyl-4-sulfonate) imidazolium, acrylamide and N,N′-methylenebisacrylamide in a quaternary porogenic solvent consisting of formamide, dimethyl sulphoxide, polyethylene glycol 8000 and polyethylene glycol 10 000 for capillary hydrophilic interaction chromatography. The monolithic stationary phase was optimized by adjusting the amount of monomer in the polymerization solution along with the composition of porogenic solvent. The optimized monolith exhibited excellent selectivity and favorable retention for nucleosides and benzoic acid derivatives. The primary factors affecting the separation efficiency of the monolithic column (including acetonitrile content, pH, and buffer salt concentration in the mobile phase) have been thoroughly evaluated. Excellent reproducibility of the retention times for five nucleosides was achieved, with relative standard deviations of run-to-run (n = 3), column-to-column (n = 3) and batch-to-batch (n = 3) in the range of 0.18–0.48%, 2.33–4.20% and 3.07–6.50%, respectively.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhi Qian,Zhao-Dong Qiu,Rui-Qing Wang,Mei-Tong Wei,An-Min Fei,Zhi-Yi Hu,Hemdan S.H. Mohamed,Li-Hua Chen,Yu Li,Bao-Lian Su
All-solid-state batteries (ASSBs) have obtained much attention due to the high energy density and security. At present, PEO-based solid-state batteries are considered to be one of the most promising candidates for high-performance ASSBs due to the excellent processability and good interfacial stability. However, low ionic conductivity and Li + transference number seriously hinder their progress in practical applications. Here, a novel filler is developed by embedding ionic liquid (IL) grafted onto the surface of MXene to improve the electrochemical performance of PEO-based solid composite polymer electrolyte (MXene-IL-SPE) for ASSBs. The 2D MXene can significantly reduce the crystallinity of PEO, and the presence of IL not only enhances the dispersion of MXene in the polymer matrix, but also promotes the dissociation of lithium salts and anchors anions. As a result, the MXene-IL-SPE possesses high ionic conductivity (7.19 × 10 −4 S cm −1 ) and Li + transference number (0.51), together with wide electrochemical window (5.2 V) at 60 °C. The assembled LiFePO 4 |MXene-IL-SPE|Li full cell exhibits remarkable rate capability and exceptional capacity of 154.8 mAh g −1 over 120 cycles with an impressive 95.3 % capacity retention at 0.5 C. This design opens up a new way to prepare high performance CPEs for ASSBs.
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JOURNAL OF MOLECULAR STRUCTURE
·
2020
·
IF 2.463
Lifang Hu,Hong Peng,Qi Xia,Yu Zhang,Roger Ruan,Wenguang Zhou
Ionic liquid (IL) pretreatment of lignocellulosic biomass has been the focus of attention due to its numerous advantages compared with conventional methods. The change in the physicochemical properties of the three main components of this biomass during IL pretreatment is the key factor for their further utilization and conversion. In this study, hemicellulose extracted from bamboo was dissolved in three ILs with different imidazolium cations and the same anion of acetate, including 1-ethyl-3-methylimidazolium acetate (EmimAc), 1-butyl-3-methylimidazolium acetate (BmimAc), and 1-allyl-3-methylimidazolium acetate (AmimAc). The solubility of hemicellulose in the ILs was measured as a function of temperature from 120 °C to 150 °C. Hemicelluloses regenerated from the saturated IL solutions were characterized by using Fourier transform infrared spectroscopy , gel permeation chromatography , gas chromatography–mass spectrometry, 13C–1H heteronuclear single-quantum correlation nuclear magnetic resonance, and thermogravimetry . The solubility of hemicellulose in the three ILs was greatly affected by temperature, and the solubility increased with increasing temperature. The highest solubilities per 100 g of IL were 15.56, 15.09, and 6.73 g in BmimAc, EmimAc, and AmimAc, respectively. Hemicelluloses regenerated from saturated IL solutions showed similar physicochemical features with that of the original hemicellulose before being pretreated with ILs. These features included molecular weight , relative neutral sugar composition , structural feature, and thermal stability . Hence, hemicellulose was litter degraded during IL solving. In addition, the recovered EmimAc was analyzed after dissolving hemicellulose to a saturated state at 150 °C by using 13C and 1H NMR. The recovered IL contained minimal amounts of ethanol and other impurities.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Guoqiang Xing,Guoqiang Kuang,Yijie Tao,Yi Wang,Yue Kang,Yafei Guo,Shiguo Zhang
Polymer electrolytes are the key composite for all-solid electrochromic devices due to their unique properties including high ionic conductivity , good flexibility, etc. However, such applications are still impeded by the poor mechanical strength . In this study, novel quasi-solid polymer/ionic liquid composite electrolyte is constructed and the tensile strength is greatly enhanced by coupling epoxy composite with glass fibers (GFs) as the reinforcement. The tensile strength of the composite electrolyte is tripled and reaches 7.6 MPa after optimizing the content of GFs with the ionic conductivity of 1.75 × 10 −5 S cm −1 . Then, a dual-coloring electrochromic device fabricated with the composite electrolyte presents excellent switching stability (18000 cycles, >180000 s), fast response (˂2 s), ultra-high coloring efficiency (η = 451 cm 2 /C) and low driving voltage (±1 V). In addition, a substrate-free and flexible electrochromic device based on the composite electrolyte is successfully assembled, which demonstrates remarkable electrochromic behaviors, unique flexibility and mechanical stability. This work may promote the development of low-cost, easily-assembled, ultrahigh-flexible and high-performance electrochromic devices.
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高影响因子
NORDIC PULP & PAPER RESEARCH JOURNAL
·
2019
·Vol. 34
·期 4
·495-506
·
IF 0.929
Mingfu Li,Douyong Min,Xing Long,Qiyuan Tu,Kelei Zhang,Shuangfei Wang,Lianxin Luo
Ionic liquids (IL) of 1-butyl-3-methylimidazolium chloride (BmimCl) homogeneously mixed with bleached kraft pulp (BKP) were used to investigate the change of paper properties and refining performance under the general conditions. Fiber morphology and paper strength were determined by fiber analyzer and paper physical property tester. The surface morphology and chemical properties of fiber was also performed by scanning electron microscope (SEM), X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results indicated the optimized conditions of BmimCl pretreatment were BmimCl dosage of 1.5 mL/g, the time and temperature of 30 min and 80 °C, respectively. The physical properties of paper and internal bond strength of fiber was improved by BmimCl pretreatment. BmimCl pretreatment facilitated swelling and fibrillation of fiber, increased the crystalline index of fiber and decreased the lignin and extractives on the surface of fiber, which leading to improve fiber strength and tensile strength. For the same refining energy input, saving the maximum refining energy consumption was 14.0 % after BmimCl pretreatment, which is beneficial to improve the application of ionic liquid in pulp and papermaking.
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IONICS
·
2023
·Vol. 29
·期 4
·1381-1393
·
IF 2.8
Zeng Yong,Wang Keliang,Ke Xiang,Tan Xiaoqing,Jiang Bo,Zhu Weichen,Xiao Rengui
Compared with Li-ion batteries, dual-graphite batteries (DGBs) have low cost, easy handling, and renewable advantages. However, DGBs with pure ionic liquid as the electrolyte (LEDGBs) suffer from high self-discharge rate (SDR). Here, a gel polymer electrolyte (ILGPE) was prepared using polyvinylidene fluoride as the polymer matrix and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide as the electrolyte and assembled into a gel polymer double-graphite battery (IGDGB). The results show that the IGDGB has an initial discharge capacity of 34.9 mAh g -1 , and SDR is only 3.63%/h lower than the LEDGB (25.07%/h) after resting for 3 h. Notably, even after resting for 10 h, the IGDGB still has a discharge capacity of 27.5 mAh g -1 . Meanwhile, the electrochemical impedance spectroscopy analysis results indicate that the low SDR of IGDGB is due to the limiting effect of ILGPE on the carrier strength. This result provides an idea of self-discharge reduction strategy for other electrochemical energy storage systems with intercalation storage mechanism.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2014
·
IF 3.107
Changyan Wu,Wei Chen,Linxin Zhong,Xinwen Peng,Runcang Sun,Junjie Fang,Shaobo Zheng
Preparation of biopolymer-based catalysts for the conversion of carbohydrate polymers to new energies and chemicals is a hot topic nowadays. With the aim to develop an ecological method to convert xylose into furfural without the use of inorganic acids, a biopolymer-derived catalyst (lignosulfonic acid) was successfully used to catalyze xylose into furfural in ionic acid ([BMIM]Cl). The characteristics of lignosulfonic acid (LS) and effects of solvents, temperature, reaction time, and catalyst loading on the conversion of xylose were investigated in detail, and the reusability of the catalytic system was also studied. Results showed that 21.0% conversion could be achieved at 100 °C for 1.5 h. The method not only avoids pollution from conventional mineral acid catalysts and organic liquids but also maked full use of a byproduct (lignin) from the pulp and paper industry, thus demonstrating an environmentally benign process for the conversion of carbohydrates into furfural.
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Scientific Reports
·
2016
·Vol. 6
·期 1
·1-7
·
IF 5.228
Qu Yongshui,Li Li,Wei Quanyuan,Huang Chongpin,Oleskowicz-Popiel Piotr,Xu Jian
Conversion of carbohydrate into 5-hydroxymethylfurfural (5- HMF), a versatile, key renewable platform compound is regarded as an important transformation in biomass-derived carbohydrate chemistry. A variety of ILs, not only acidic but also alkaline ILs, were synthesized and used as catalyst in the production of 5-HMF from disaccharide. Several factors including reaction temperature, IL dosage, solvent and reaction time,were found to influence the yield of 5-HMF from cellobiose. Of the ILs tested, hydroxy-functionalized ionic liquid (IL), 1-hydroxyethyl-3-methylimidazolium tetrafluoroborate ([AEMIM]BF 4 ) showed the highest catalytic activity and selectivity. 5-HMF yield of 68.71% from sucrose was obtained after 6 hrs at 160 °C. At the same condition with cellobiose as substrate, 5-HMF yield was 24.73%. In addition, 5-HMF also exhibited good stablity in this reaction system. Moreover, a kinetic analysis was carried out in both acidic and alkaline IL-catalyzed system, suggesting main side reaction in the conversion of fructose catalyzed by acidic and alkaline IL was polymerization of fructose and 5-HMF degradation, respectively.
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