Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 10
·3542-3552
·
IF 6.4
Yuqing Dong,Ka-Wai Yeung,Chak-Yin Tang,Chi Ho Wong,Wing-Cheung Law,Gary Chi-Pong Tsui,Xiaolin Xie
Transparent polymer electrolytes are important components in fabricating transparent ionic electroactive polymers (iEAPs). Ionic liquids (ILs) have been widely used as the ionic source for polymeric electrolytes due to their broad electrochemical window and non-volatility. ILs with long alkyl chains, such as 1-decyl-3-methylimidazolium chloride (C10MIMCl), may reduce the crystallinity and allow higher transparency of polymer electrolytes. However, it has been reported that the strong ionic interaction in C10MIMCl hinders the migration of ions and thus affects the electromechanical deformation of polymer/C10MIMCl electrolytes. In our work, iEAPs made of PVA/C10MIMCl electrolytes were fabricated with high optical transparency. The poor electromechanical deformation of the electrolyte containing the long alkyl chain IL has been overcome. The hydrogen bonding formed between the IL cations (C10MIM+) and the polymer chains enabled the Cl−-controlled deformation. In addition, the hygroscopicity of IL allows for a higher degree of ion dissociation while the absorbed water widens the migration channels for Cl−, and the combined effect has significantly improved the actuation performance of the iEAPs. We also found that the deformation of PVA/C10MIMCl iEAPs increases with higher water content in the electrolyte, achieving the highest average bending curvature of 40.53 ± 0.21 m−1 under 2 V DC. Compared with the iEAPs using the same IL reported in the literature, the actuation response of the iEAP containing C10MIMCl is improved.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20500-20512
·
IF 9.931
Xiongwei Li,Yuezhan Feng,Chao Chen,Yunsheng Ye,Hongxia Zeng,Hao Qu,Jingwei Liu,Xingping Zhou,Shijun Long,Xiaolin Xie
The low heat dissipation efficiency and serious security issues related to polymer-based thermal management materials (TMMs) have seriously limited their practical applications. However, simultaneously improving their thermal conductivity (TC) and flame retardancy is still a challenge due to performance limitations and complicated processing. Here, non-covalent ionic liquid flame retardant-functionalized boron nitride nanosheets (ILFR-fBNNSs) were used as a multifunctional nano-additive for fabricating epoxy (EP)-based nanocomposites with both superior TC and flame retardancy. Owing to its structural uniqueness and multifunctionality, the ILFR-fBNNS triggers resin crosslinking at a given temperature, while conferring significant improvements in dispersion and interfacial adhesion, thereby forming a thermally conductive network with reduced interfacial phonon scattering and a high-efficiency nano-barrier network acting synergistically with ILFR-induced char residues during thermal degradation. Therefore, the ILFR-fBNNS not only functions as a curing agent for fabricating the nanocomposites, but also acts as a thermal conductor and flame retardant for the nanocomposites. The optimal comprehensive performances of EP/ILFR-fBNNS nanocomposite are achieved with a 12.1 vol% ILFR-fBNNS content with TC enhancement of 478%, and reductions of up to 68.9% and 42.3% by microscale combustion calorimetry (42.4% and 37.7% by cone calorimeter) in peak heat release rate (PHRR) and total heat release (THR) respectively compared to neat EP.
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MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Haixia Lyu,Kai Hu,Qinghua Chu,Zhiping Su,Zenghong Xie
In this paper, an ionic liquid mediated molecularly imprinted polymer (IL-MIP) was prepared, in which synthesis system 1-butyl-3-methylimidazolium tetrafluoroborate (IL) was introduced to improve its selectivity and adsorption for the target. The structures of the prepared materials were characterized by SEM, BET, 13 CNMR and FTIR, and the adsorption performance of the resultant IL-MIP for BPA and its analogues (phenol, 4-NP, 4-CAP and 1-naphthol) in strong polar media were investigated in detail. The experimental data showed that the adsorption capacities of IL-MIP and molecularly imprinted polymer (MIP) for Bisphenol A (BPA) were 116.16 mg/g and 87.30 mg/g, with imprinting factor of 3.77 and 2.72, respectively. In addition, several other competitive analogues with different polarities (phenol, 4-NP, 4-CAP and 1-naphthol) were chosen to evaluate the selectivity of IL-MIP and the experimental results demonstrated that the synthesized IL-MIP displayed selectivity toward BPA and against analogue molecules. This work provided a simple and effective method to selectively extract BPA from aqueous medium or strong polar organic solvent.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 23
·期 3
·2005-2014
·
IF 3.43
Haibin Gou,Xifei Ma,Qian Su,Lei Liu,Ting Ying,Wei Qian,Li Dong,Weiguo Cheng
The development of metal-free, high effective and recyclable catalysts plays a pivotal role in transforming CO2 into high value-added products such as cyclic carbonates. In this paper, we introduced the hydrogen bond donor (HBD) groups into poly(ionic liquid)s via free radical polymerization, which successfully combined the HBD and ionic liquids (ILs) into one heterogeneous catalyst. The HBD could synergistically activate epoxides with hydroxyl functionalized ionic liquids and efficiently catalyze the cycloaddition of CO2 into cyclic carbonates. The yield of propylene carbonate (PC) reached 94% (at 105 °C, 2 MPa CO2, 3 h), which far exceeded poly(ionic liquid)s without HBDs functionalization (PC yield 72%), and even approached bulk ionic liquids (PC yield 95%). Moreover, HBD-functionalized poly(ionic liquid)s (HPILs) exhibited excellent recyclability after five runs and afforded wide substrate scope. According to the experimental results, 1H NMR spectra and density functional theory (DFT) calculations showed 2-hydroxyethyl methacrylate (HEMA) and the hydroxyl of ILs would form strong H-bonds with epoxides contributing to the ring-opening process of epoxides, and a possible HBD and nucleophilic anion synergistically catalytic mechanism was proposed. The method herein paved a brand new way for green technology and utilization of poly(ionic liquid)s.
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
Yanqing Qu,Yuxin Zha,Xiaoyu Du,Shuangping Xu,Mingyu Zhang,Liang Xu,Hongge Jia
Covalent organic frameworks (COFs) are a promising candidate for advanced water treatment membranes due to their numerous benefits, such as adjustable pore diameters, high crystallinity, chemical stability, and a well-organized channel structure. Liquid–liquid interfacial polymerization is an effective method for COF membrane synthesis owing to its comparatively milder reaction conditions and efficient collection of products from the reaction system. However, the fabrication of continuous COF membranes at a non-alkane/water interface remains a formidable task due to membrane flaws caused by solvent evaporation and the restriction of water-soluble monomers. At the alkane/ionic liquid interface, we synthesized two self-standing, flexible, imine-linked COF membranes with different thicknesses and morphologies. The ionic liquid as a solvent can dissolve various amines, and polyamide nanofilms can be formed by the intermolecular reaction between amines and trimesoyl chloride. The freestanding ultrathin selective membrane is created with continuous, defect-free, and vast areas of up to 2 cm in diameter wafer-scale pore sizes as ultrafast molecular sieving. The membrane exhibited an extremely high water flow of 67.37 L m–2 h–1 bar–1 as well as an excellent rejection (98.7% for methylene blue). The resulting polyamide nanofilms displayed ultrahigh water permeability and good dye rejection selectivity.
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PROCESS BIOCHEMISTRY
·
2022
·
IF 4.885
Wenxue Zhang,Isaac Duah Boateng,Wenjing Zhang,Shifang Jia,Tingting Wang,Liurong Huang
The application of dual-frequency ultrasound-assisted ionic liquids (UA-IL) pretreatment on the development of compound modification and produce soy protein isolate (SPI) with excellent functional properties is limited. In this research, the effect of UA-IL on the structure and interfacial properties of SPI were evaluated. The results of UV spectrum and intrinsic fluorescence showed that combined ultrasound and ionic liquids pretreatment could loosen the protein structure and expose more hydrophobic groups that were initially hidden inside the molecules. The SDS-PAGE showed there was no significant change in the primary structure of SPI. Besides, the data from FTIR and DSC suggested that the UA-IL could destroy the hydrogen bond between protein molecules and promote its distribution more uniformly. Moreover, UA-IL (1-butyl-3-methyl imidazolium hexafluorate phosphate, [BMIM][PF 6 ]) pretreatment significantly increased the protein’s solubility, reaching 38.33% at the IL/protein ratio of 0.1. There was also an increasing trend for the emulsion activity, foaming capacity and foaming stability of SPI after the UA-IL pretreatment. The current findings indicated that combining ultrasound and ionic liquids pretreatment might be a promising method to change the SPI structure and interfacial properties.
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ACS Catalysis
·
2025
·
IF 13.1
Hanwen Yan,Xiaoyan Zheng,Jie Li,Feng Huo,Chunshan Li
Rational screening and design of homogeneous catalysts remain a core challenge in multistep reaction systems, particularly when multiple elementary steps exhibit comparable and elevated activation barriers. Inspired by the Sabatier principle and the degree of rate control theory, we propose a barrier-balancing machine learning framework that focuses on coordinating rather than minimizing individual energy barrier with density functional theory calculations and experimental validation, to identify efficient secondary amine ionic liquid catalysts. Taking the Mannich reaction to synthesize methylacrolein as a probe, we target two kinetically significant steps of nucleophilic attack on formaldehyde (ΔE1) and decomposition of the intermediate (ΔE2), and define the maximum of the two as the model’s training target. A physically interpretable multidimensional descriptor library is constructed, integrating physicochemical-based properties, Morgan fingerprints, volume-based steric parameters, and quantum chemical features. The trained random forest model, interpreted via SHapley Additive exPlanations (SHAP), identifies key descriptors that govern barrier heights. A barrier-based scoring metric derived from model predictions shows strong correlation with experimental selectivity, validating its physical relevance and predictive power. This framework not only differentiates aryl- and alkyl-substituted amines by their electronic environments, but also offers an interpretable and generalizable tool for catalyst screening in complex homogeneous systems.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Fangfang Li,Xiaofang Hou,Wei Fu,Jinjin Wang,Ying-Hua Zhou
The efficient transformation of CO 2 into high-value chemicals remains a significant challenge, particularly in the design of heterocatalysts capable of simultaneous multi-site activation towards the substrate. In this work, we develop the novel Zr-MOF catalysts incorporating both cobalt(II) meso-tetra(4-carboxyphenyl)porphine (CoTCPP) complex and the imidazolium bromide-based ionic liquid (IL) containing different alkyl chain (RImBr), where R = Et, Pr, Bu, and Pe), denoted as CoTCPP-UiO-66-IL(RImBr). The catalysts were synthesized through a solvothermal method followed by a post-synthetic modification. Among the prepared catalysts, CoTCPP-UiO-66-IL(BuImBr) demonstrated exceptional performance on the solventless and cocatalyst-free conversion of epichlorohydrin into chloropropene carbonate, achieving a remarkable 99% yield under mild conditions (90 °C and 1.0 bar CO 2 ). This outstanding catalytic efficiency was attributed to the synergistic effects of the dual Lewis-acid active sites offered by Zr-MOF node and the integrated CoTCPP complex, the strong nucleophilicity resulting from the incorporated imidazolium bromide-type IL, and the improved CO 2 adsorption capacity. Additionally, the CoTCPP-UiO-66-IL(BuImBr) catalyst exhibited excellent recyclability and broad substrate versatility in epoxide cycloaddition. These findings provide valuable insights into the development of multifunctional MOF-based heterogeneous catalysts with high activity and sustainability for CO 2 conversion applications.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yanan Xu,shiyue Zhang,Yu Zhang,Qing Hu,Hao Li,wenkai Wang,Hongbin Du
Silicon is utilized as a functional material in various fields such as semiconductors, bio-medicine, and solar energy. To prepare Si materials, researchers have proposed methods including carbothermal reduction, hydrothermal reduction, and magnesiothermal reduction, but these strategies often involve high temperatures or unwanted by-products. Herein, we present a room-temperature ionic liquid reduction system to prepare Si nanospheres based on 1-butyl-3-methylimidazolium chloride-aluminum chloride ([Bmim]Cl-AlCl3). In this room-temperature solution system, AlCl3 not only absorbs the heat generated in the reaction, but also can be reduced by metallic Mg to active intermediates, which participates in the reduction of the SiO2. Furthermore, spherical SiO2 can be gently reduced to spherical nano-Si with preserved morphology in the [Bmim]Cl-AlCl3 system. When the prepared Si nanosphere electrode is employed as the anode in lithium-ion batteries, it demonstrates an initial Coulombic efficiency of 82.9% and capacity retention of 94.2% after 100 cycles at 0.5 A g-1. Moreover, the SVC electrode, obtained by reducing SiO2@C, exhibits almost no capacity decay after 100 cycles and retains a specific capacity of 914 mA h g-1 after 600 cycles at 2 A g-1. This study provides an alternative, mild preparative route to Si-based functional materials with preserved morphology and components of the Si-precursors.
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EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Zichen Wang,Yao Dai,Yumeng Wang,Peilu Zhang,Lin Zhou,Yuan Jiang,Ruoke Liu,Sarah Elfadil Ali Adam,Chao Sun,Xiaochun Chen
Polyethylene glycol terephthalate (PET) is widely utilized in industrial applications and everyday life. However, its extensive use has led to substantial environmental challenges. This study presents a highly active and selective [DBU][m-cresol] proton-ionic liquid (PIL)-immobilized ZIF-8 catalyst for PET resource utilization. Using just 15 mg of the ZIF-8@[DBU][m-cresol]-2 catalyst, PET degradation reached 97.72 %, while BHET conversion achieved 86.95 % within 60 min. The Zn 2+ ions in the catalyst decrease the electron density of the m-cresol carbocation, thus improving the nucleophilic substitution capability of [DBU][m-cresol]. The influence of catalyst dosage, the ethylene glycol-to-PET ratio, and temperature on degradation and conversion was investigated. After five cycles, the catalyst retained a degradation efficiency of 77.71%. In practical applications, testing on three commercial PET materials demonstrated degradation efficiencies exceeding 90%. DFT calculations and LC-MS analysis indicate that hydrogen bonding among ethylene glycol (EG), PET, and ZIF-8@[DBU][m-cresol] enhances PET’s electrophilicity, while Zn 2+ decreases the electron density of carbocations, thereby facilitating PET degradation. This work highlights the potential of proton-based ionic liquid-supported catalysts for efficiently converting PET waste into valuable resources.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-13
·
IF 2.8
Tong Hongping,Li Shuangqing,Dong Xiuling,Xing Zheng,Li Haitao,Liu Xiang
Electrically conductive hydrogel matrices embedded with carbon-based nanomaterials have undergone comprehensive scientific examination, showing notable promise for implementation in next-generation flexible electronics tailored to wearable technologies. Nevertheless, the uneven dispersion of carbon nanoparticles is the key to hindering the stretchability, high elasticity, and electrical conductivity of the material. Herein, ionic liquid 1-vinyl- 3-butyl imidazole bromide ([VBlm]Br) and polyacrylamide/sodium alginate (PAM/SA) were selected to form a new copolymerized hydrogel to improve the dispersion of conductive graphite (KS- 6) in the hydrogel. Due to the existence of an electron–ion conducting network and spatial cross-linking, making the prepared KS- 6/1.0[VBlm]Br/PAM/SA hydrogelhas good conductivity (22.39 mS/cm), tensile strain (467%), mechanical strength (73.64 kPa), toughness (161.09 kJ m −3 ), and adhesion (67.861 kPa). In addition, the flexible sensor based on the KS- 6/1.0[VBlm]Br/PAM/SA hydrogel also showed excellent performance, demonstrating that ionic liquids and carbon materials can synergistically enhance mechanical properties and electrical conductivity. The high-temperature sensing performance and high sensitivity (GF = 4.01) make the KS- 6/1.0[VBlm]Br/PAM/SA hydrogel an ideal candidate for building the next generation of gel-based strain sensor platforms.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yujia liu,Lina Zhang,Qurat ul ain,Zhangfa Tong
Cellulose acetate (CA) has traditionally been synthesized through processes that require the activation of cellulose, the use of corrosive acid catalysts, and subsequent hydrolysis. These factors make the process complex, costly, and environmentally harmful. This study proposed a method for preparing cellulose acetate by coupling sodium acetate (a non-toxic metal salt) with 1-butyl-3-methylimidazole chloride (BmimCl) ionic liquid. Single-step synthesis of cellulose acetate with a degree of substitution (DS) ranging from 0.71 to 3.0 was achieved under varying reaction conditions. The experimental results demonstrated that adding sodium acetate significantly enhanced the acetylation efficiency of cellulose in an ionic liquid across a broad temperature range. In addition, the cellulose acetate film prepared by this method has 95 % transparency, a tensile strength of 64.5 ± 1.9 MPa, and a water vapor permeability of 34.48 ± 1.47 g/m 2 h −1 . These remarkable properties give the film significant potential to serve as a replacement for petroleum-based plastics. Overall, this study presents a novel and efficient strategy to boost cellulose acetylation in an ionic liquid, delivering a sustainable, cost-effective, and scalable solution for producing cellulose acetate with precise DS control in just one step.
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