INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shaoping Ma,Changyong Cai,Xuhong Guo,Zhijian Tan
Membranes have been used as versatile tools for the separation of various natural products; however, the selective separation of structural analogs of natural products using membranes remains challenging. In this study, biocomposite membranes based on poly(ionic liquids) and different natural fibers (jute, cotton, or wool) were successfully prepared. Natural fibers can regulate the microstructure and improve the mechanical properties of membranes. Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, Brunauer-Emmett-Teller analysis, and thermo gravimetric analysis were used to characterize the membranes. The membranes were used to separate tanshinone homologs (tanshinone I, tanshinone IIA, cryptotanshinone, and dihydrotanshinone I), allowing cryptotanshinone to penetrate the membrane while rejecting tanshinone I. A maximal selectivity of 44.57 % was obtained for the tanshinone homologs using a one-step separation protocol. These poly(ionic liquids)/natural fiber membranes possess high water flux, good self-cleaning, and good antibacterial properties. The membranes were effective in separating tanshinone homologs and have the potential to separate other natural homologs.
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PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Xiangyu Zuo,Hongxiang Yu,Feng Zhou,Xia Zhang
Two-dimensional materials and ionic liquids are widely used as lubricating materials due to their excellent tribological properties. This study designed three water-based proton-ionic liquids (PILs) and synthesized molybdenum disulfide (MoS2) nanosheets for their combination as water-based lubricant additives. The composite lubrication system exhibits excellent tribological properties, with a friction coefficient as low as 0.024, reducing friction by 90.77% compared to water–glycol. Mechanism studies have shown that the excellent lubrication performance comes from the adsorption of ionic liquids at sliding interfaces, the interlayer slip of MoS2, and the generation of tribofilms at wear scars. This work provides theoretical support and technical guidance for the design and preparation of new water-based lubricating additives.
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高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2025
·
IF 3.4
Wei Shen,Zilong Yang,Xiaolin Guo,Hongxiao Jin,Wenxiang Chai,Hongliang Ge,Dingfeng Jin
Amino acid ionic liquids (AAILs) are potential green substitutes of aqueous amine solutions for carbon dioxide (CO 2 ) capture. In this study, we prepared three amino acid ionic liquids, constructed from tetrabutylphosphine hydroxide in combination with glycine, histidine, and arginine. We have conducted a comprehensive study on the CO 2 absorption capacity of structures containing single, double, and triple N–H groups. The solubility of CO 2 in [P 4444 ][Gly], [P 4444 ][His] and [P 4444 ][Arg] were measured experimentally over a temperature range of 30–110 °C and up to a pressure of 0.75 MPa. The results indicate that the solubility of carbon dioxide in amino acid ionic liquids decreases with increasing temperature, while it increases with increasing pressure. The optimal CO 2 absorption conditions of three amino acid ionic liquids were determined to be 50 °C, 0.75 MPa. Moreover, CO 2 absorption capacity of three amino acid ionic liquids followed the order: [P 4444 ][Arg] > [P 4444 ][His] > [P 4444 ][Gly]. Studies on the recycling and regeneration of amino acid ionic liquids verified their reusability in the process and confirmed that the reaction between AAILs and CO 2 could be reversed at 140 °C. Finally, the recycle capacity and CO 2 removal efficiency of [P 4444 ][Gly], [P 4444 ][His] and [P 4444 ][Arg] were evaluated.
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高影响因子
CHEMISTRY & BIODIVERSITY
·
2025
·
IF 2.5
Yuanyuan Zhang,Haixin Liu,Xiang Xu,Xin Shen,Haolong Qi,Yilin Xing,Mengyi You,Tao Sun,Zhiqiang Cai,Xiaoyan Zhang
Leaning pillar[6]arene (LP6A) is an expanded version of pillar[6]arene (P6A), possessing not only the nanometer-sized cavity of P6A but also a unique desymmetrized leaning tower-like structure, which offers better structural flexibility and cavity adaptability. Here we report the first example of the utilization of imidazolium ionic liquid (IMIL) functionalized LP6A (LP6A-C10-IM-C8[NTf 2 ]) as a stationary phase in capillary gas chromatography (GC). The LP6A-C10-IM-C8[NTf 2 ] capillary column was prepared by the static coating method, showing medium polarity (average polarity 155) and high column efficiency (3758 plates/m). Using long alkyl chains modified LP6A (LP6A-C10) as a reference column, its retention behaviour and resolving performance were elucidated by a mixture of 30 analytes. Importantly, the LP6A-C10-IM-C8[NTf 2 ] column exhibited advantageous separation performance for the challenging isomers of halogenated benzenes, benzaldehydes, phenols, and anilines over the LP6A-C10 and commercial HP-5, HP-35, and DB-17 columns. In addition, the LP6A-C10-IM-C8[NTf 2 ] column has been used to determine the purity of isomer impurities in actual samples, demonstrating good potential in GC separations. Graphical This work reported the first example of utilization of imidazolium ionic liquid (IMIL) functionalized leaning pillar[6]arene (LP6A-C10-IM-C8[NTf 2 ]) as a stationary phase in capillary gas chromatography separations and obtained a high resolution performance for multiple anayltes.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Yue Wang,Wenxiu Li,Saisai Wang,Pengfei Wang,Tao Zhang
Ionic liquids (ILs) exhibited enhanced extraction performance compared with traditional organic solvents in azeotropic separation processes. In this paper, three kinds of ILs: 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), 1-butyl-3-methylimidazolium diethylphosphate ([BMIM][DEP]), and 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF6]) were considered as extractants for separate n-heptane and acetone. The effect of temperature (298.15, 303.15, and 308.15 K) on the selectivity and distribution coefficients was then investigated. Liquid–liquid equilibrium (LLE) experiments demonstrated that three ILs proved the separation efficiency for acetone. The experimental data were then regressed and validated using the Othmer–Tobias equation and the Hand equation. In addition, the NRTL (nonrandom two liquids) model was used to correlate the LLE experimental data, and the NRTL parameters are verified through the “GMcal_TieLinesLL” tool. Finally, molecular interaction mechanisms were further elucidated through surface electrostatic potential mapping (ESP) and an independent gradient model based on Hirshfeld partition analysis (IGMH) analysis. This research establishes a theoretical framework for industrial-scale separation of ketone/alkane mixtures while providing valuable insights into structure–property relationships of ILs in separation processes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jin Liu,Siyu Gan,Daixuan Yang,Qilin Yue,Shijie Sun,Min Wu,Xiuyun Li,Guanjun Chang,Yong Wei
Ionoadhesives hold great potentials for detachment and replacement of bonding components by virtue of the interfacial electrochemistry reactions of ion carriers, but previous ionoadhesives suffer from liquid leakage and conflict between mechanical properties and ionic conductivity . Here, a liquid-free and nanophase separated poly(ionic liquids) ionoadhesive (PIA) is designed through establishing multiple non-covalent interactions (NCIs) including weak ion–dipole interactions, moderate lithium bonds and strong electrostatic interactions. As a result, the physical crosslinked networks in PIAs are effectively strengthened that ensures the mechanical performances under static state; the breaking-reforming events of the multiple NCIs are beneficial for dissipating energy to resist external deformations that endows the PIAs with outstanding dynamic stability; the multiple NCIs also induce the orientation of nanophases that enables the PIAs to be reinforced via cyclic mechanical training. Benefiting from the high ionic conductivity , the PIAs exhibit extraordinary electrically detaching behavior under DC voltages since the occurrence of rapid interfacial electrochemistry reactions that facilitates the formation of gases and nanoparticles at the bonding interfaces. This work proposes a new rational design of electrically detachable ionoadhesives with excellent comprehensive performances that demonstrate great potentials in recycle and reuse of the bonding components and reduce the waste of industrial resources.
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高影响因子
CARBON
·
2025
·
IF 11.6
Meng-meng Xu,Qi-guang Huang,Tian-li Hui,Tao Zheng,Hai-yan Liu,Rui Zhang,Xiang-hai Meng,Zhi-chang Liu
Mesophase pitch is a crucial compound platform for the production of various advanced carbon materials, with its quality significantly influenced by the composition and structure of precursor materials. Here, we present a novel method for preparing naphthalene oligomers (NOs), which serve as precursors for the preparation of mesophase pitch (MP) via naphthalene polymerization catalyzed by chloroaluminate ionic liquids (Al-ILs). Different from those obtained via AlCl 3 -catalyzed method, the NOs synthesized by Al-ILs possess a narrow molecular weight distribution (MWD, 200–600 Da) and a well-defined molecular composition (di-, tri-, and tetra-polymers of naphthalene). When the prepared NOs were used as precursors, the resulting MP exhibited a shorter polycondensation time (4 h), higher yield (68%), lower ash content (0.005%), more concentrated MWD, and easier carbonization. These improvements are attributed to the tunable structure and acidity of Al-ILs, which facilitate naphthalene polymerization at low reaction temperatures and appropriate acidity, thereby improving its controllability. This work provides a flexible and efficient pathway for the custom production of NOs that potentially enable broader industrial applications of MP.
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高影响因子
Energetic Materials Frontiers
·
2025
·
IF 3.9
Rui-lei Guo,Shuai-jie Jiang,Ya-qi Qin,Ming Lu,Peng-cheng Wang
s Hypergolic ionic liquids (HILs) have been investigated to replace traditional toxic hydrazine fuels. Among numerous HILs, borohydride ionic liquids have demonstrated excellent ignition performance and have the potential to be used as a new generation of propellants. In this work, a series of HILs were synthesized for the first time utilizing the octahydrotriborate (B 3 H 8 – ) anion, paired with cations featuring nitrogen-rich functional groups derived from imidazole, triazole, and pyridine. Comprehensive characterization of all resulting ionic liquids was performed using 1 H and 13 C NMR, IR spectroscopy, and high-resolution mass spectrum. Key properties including melting points (-17.8∼131.9 o C), decomposition temperatures (95.4∼196.1 o C), thermal kinetic parameters, and heats of formation were measured or calculated. Consistent with expectations, these HILs demonstrated ultra-fast ignition delay (ID) times upon contact with white fuming nitric acid (WFNA), accompanied by significantly high specific impulse ( I sp ). Furthermore, the [B 3 H 8 ] – anion also exhibited superior decomposition efficiency compared to the boron cage structure.
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高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Qiang Li,Yulan Hu,Bingjian Zhang
ABSTRACT Historical monuments are increasingly being threatened by unexpected microbial colonizers, leading to their subsequent deterioration. Here, two tetraalkylphosphonium polyoxometalate ionic liquids (Q14-IL and Q16-IL) were successfully synthesized, which showed excellent antibacterial activity against four bacteria colonising wall paintings. Notably, Q14-IL exhibited superior antibacterial efficacy compared to longer alkyl Q16-IL. Additionally, polyvinyl alcohol/chitosan (PVA-CS) hydrogels containing two ILs were prepared, and the morphology, thermal stability, swelling ratio and antibacterial activity were systematically evaluated. The results suggest that higher CS content resulted in more uniform micropores and increased the swelling ratio. However, fewer antibacterial ILs were released and diffused over time from the matrix. Hydrogels with 5% CS content exhibited the highest antibacterial activity, which was mainly attributed to the synergetic antibacterial activity of positively charged ammonium (−NH 3 + ) groups of CS and quaternary phosphonium cation of ILs. This study may provide an alternative strategy for fighting against bacterial communities colonising ancient artworks.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Jingheng Zhu,Yanli Sun,Yongbo Chen,Niangeng Wu,Ruicheng Shi,Zhongqi Ren,Qunsheng Li,Hongkang Zhao
This study investigates the vapor–liquid phase equilibria for the binary system of methyl propionate and ethanol as well as for the ternary system with three ionic liquids, [BMIM][OAC], [EMIM][OAC], and [MMIM][DMP], as extractants. The nonrandom two-liquid (NRTL) model was employed to correlate the vapor–liquid phase equilibrium data. Results indicate that each ionic liquid increases the relative volatility of methyl propionate to ethanol and effectively breaks the azeotrope at a molar fraction of 0.08. The NRTL model exhibited an average relative deviation of 2.46% for binary systems and 3.73, 4.05, and 3.60% for ternary systems. Of the ionic liquids tested, [BMIM][OAC] achieved the highest separation efficiency in the methyl propionate-ethanol azeotropic system.
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高影响因子
RSC Sustainability
·
2024
·
IF 0
Lulu Wang,Hua Yuan,Xiaoli Ma,Zijin Li,Haowei Sun,Xiaoyan Zhang,Xiaoyu Huang,Qiaohong Peng,Yeqiang Tan
Ricinoleic acid, a natural hydroxy fatty acid, is a good candidate for preparing biodegradable polymer elastomers. Herein, high molecular weight poly(ricinoleic acid) (PRA) with a weight average molecular weight up to 122 kDa was successfully synthesized by solution polycondensation of methyl ricinoleate (MR) in hydrophobic ionic liquids, 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide. The influence of monomer concentration, polymerization temperature and time, catalyst and properties of the ionic liquids on the polycondensation was comprehensively studied. Compared with the melt polycondensation, the solution polycondensation of MR in the ionic liquids can achieve much higher molecular weights. The PRA polymerized in ionic liquids shows a 100% cis structure like the natural monomer.
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CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2016
·Vol. 29
·期 4
·497-507
·
IF 0.496
Ding Shan,Wei Li-gang,Li Kun-lan,Ma Ying-chong
Binary mixtures of 1,3-dialkylimidazolium based ionic liquids (ILs) and water were selected as solvent systems to investigate the solute-solvent and solvent-solvent interactions on the preferential solvation of solvatochromic indicators at 25 °C. Empirical solvatochromic parameters, dipolarity/polarizability ( π *), hydrogen-bond donor acidity ( α ), hydrogen-bond acceptor basicity ( β ), and Reichardt's polarity parameters ( E N T ) were measured from the ultraviolet-visible spectral shifts of 4-nitroaniline, 4-nitroanisole, and Reichardt's dye. The solvent properties of the IL-water mixtures were found to be influenced by IL type and IL mole fraction ( x IL ). All these studied systems showed the non-ideal behavior. The maximum deviation to ideality for the solvatochromic parameters can be obtained in the x IL range from 0.1 to 0.3. For most of the binary mixtures, the π * values showed the synergistic effects instead of the E N T , α and β values. The observed synergy extent was dependent on the studied systems, such as the dye indicator and IL type. A preferential solvation model was utilized to gather information on the molecular interactions in the mixtures. The dye indicator was preferentially solvated on the following trend: IL>IL-water complex>water.
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高影响因子
危险品化学品经营许可证（带存储）