CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Yuhui Ci,Yunqian Ma,Tianying Chen,Feiyun Li,Yanjun Tang
Dissolving cellulose at low temperatures is a key step in its efficient utilization as a renewable resource to produce high-value-added platform chemicals and high-performance materials. Here, the potential of four aprotic organic solvents was investigated for use as co-solvents with a sustainable DBU-derived ionic liquid (SIL) for the low-temperature dissolution and regeneration of cellulose . Combined experiments, density functional theory calculations, and molecular dynamic simulations were performed. The type and amount of co-solvent were found to have a significant impact on the solubility of cellulose, the dissolution process, and the structure of regenerated cellulose. The addition of organic solvents can significantly reduce the cellulose dissolution temperature and increase the solubility. Among the solvents assessed, 40 wt% DMSO exhibited the most effective synergistic interaction with SIL , where the solubility of cellulose was 14.6 wt% at 75 °C. Subsequently, the effects of the different types and amounts of co-solvents on the microscopic morphology and chemical structure of regenerated cellulose were thoroughly explored. The results showed that different types of organic solvents had different effects on the microstructure of regenerated cellulose. The results may guide the manufacturing specifications of high-performance regenerated fiber materials.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yu Wan,Libing Zhang,Ting Wu,Chengli Tang,Haijun Song,Qianqian Cao
Conductive hydrogels with high performance and frost resistance are essential for flexible electronics, electronic skin, and soft robots. Nonetheless, the preparation of hydrogel-based flexible strain sensors with rapid response, wide strain detection range, and high sensitivity remains a considerable challenge. Furthermore, the inevitable freezing and evaporation of water in sub-zero temperatures and dry environments lead to the loss of flexibility and conductivity in hydrogels, which seriously limits their practical application. In this work, ionic liquids (ILs) and MXene are introduced into gelatin/polyacrylamide (PAM) precursor solution, and a PAM/gelatin/ILs/MXene/glycerol (PGIMG) hydrogel-based flexible strain sensor with MXene co-ILs ion–electron composite conductive network is prepared by combining the electrohydrodynamic (EHD) printing method and in-situ photopolymerization. The introduction of ILs provides an ionic conductive channel for the hydrogel. The introduction of MXene nanosheets forms an interpenetrating network with gelatin and PAM, which not only provides a conductive channel, but also improves the mechanical and sensing properties of the hydrogel-based flexible strain sensor. The prepared PGIMG hydrogel with the MXene co-ILs ion–electron composite conductive network demonstrates a tensile strength of 0.21 MPa at 602.82 % strain, the conductivity of 1.636 × 10 −3 S/cm, high sensitivity (Gauge Factor, GF = 4.17), a wide strain detection range (1–600 %), and the response/recovery times (73 ms and 74 ms). In addition, glycerol endows the hydrogel with excellent freezing (−60 °C) and water retention properties. The application of the hydrogel-based flexible strain sensor in the field of human motion detection and information transmission shows the great potential of wearable devices, electronic skin, and information encryption transmission.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Shu He,Hongli Fang,Jia Liu,Xing Wu,Zeng Liu,Wen Gu,Wei Shao
As classical soft materials, conductive hydrogels have attracted wide attention in the field of strain sensors due to their unique flexibility and conductivity. However, there are still challenges in developing conductive hydrogels with comprehensive mechanical strength, self-healing ability and sensitive sensing properties. In this paper, a novel PAV/CMGG hydrogel was prepared by a simple one-pot method through the introduction of 1-vinyl-3-butylimidazolium bromide (VBIMBr), acrylic acid (AA), carboxymethyl guar gum (CMGG) and AlCl 3 . The coordination bond between Al 3+ and –COO − groups on PAA and CMGG, the hydrogen bond between PAA and CMGG, and the electrostatic interaction between [VBIM] + and –COO − endow the hydrogel with good mechanical properties, self-recovery ability, fatigue resistance and great self-healing properties. PAV/CMGG hydrogel had good conductivity of 2.31 S/m which could successfully light up the bulb. The hydrogel as the strain sensor had not only a wide strain sensing capability (strain ranging from 0 to 800 %), but also a high strain sensitivity (gauge factor (GF) = 28.50 for the strain ranging from 600 to 800 %). This study can provide inspiration for the construction of new high-performance flexible sensors.
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Energy Conversion and Management-X
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2024
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IF 7.1
Furui Ma,Yuxiang Liu,Tao Huang,Xuanru Du,Qingqing Lu,Kamel Kid
The rational one-step design of poly(ionic liquid) solid polymer electrolyte (PIL-SPE) with outstanding ionic conductivity and inferior interfacial resistance with Li-electrode to preclude the Li-dendrite growth and interfacial instability of solid-state lithium metal batteries (ASLMBs) remains a grand challenge. Herein, we provide a s facile, one-step, and productive approach for the synthesis of PIL-SPE via the in situ polymerization of 1-vinyl-3-butylimidazolium bis(trifluoromethanesulfony)imide ([VBIm][TFSI]) in the presence of bis(trifluoromethane) sulfonamide lithium salt (LiTFSI) using azodiisobutyronitrile (AIBN) as initiator. This approach endows a compact and compatible interface between Li-electrode and PIL-SPE with an excellent ionic conductivity that depends on the Li-salt concentration. Thereby, in situ polymerization of monomer with 40 wt% LiTFSI (PIL-SPE-LiTFSI-40) revealed the highest ionic conductivity of 1.35 × 10 -3 S cm −1 at 303 K and 6.16 × 10 -3 S cm −1 at 353 K, besides excellent lithium transference number (0.54), oxidative stability up to 5.3 V, and constant current plating/stripping cycles for 1000 h at 0.15 mA cm −2 . Meanwhile, ASLMBs composed of PIL-SPE with LiFePO 4 and LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes delivered discharge capacities of 164.3 mA h g −1 and 155.3 mA h g −1 at 0.1 C, respectively, along with 92 % capacity retention after 100 cycles. This study may revolutionize the synthesis of PIL-SPE electrolytes for the next generation of efficient and durable ASLMBs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
De Bai,Haowei Chen,Nanxi Xiang,Chunqiao Zhang,Zhenyuan Wang,Jichuan Zhang,Chengyu Wu,Fang Wang,Jiaheng Zhang
Suppressing allele-specific genes using small interfering RNAs (siRNAs) can effectively whiten skin by influencing cellular gene and protein expression. Topical delivery of siRNA is a promising alternative to injections for RNA interference. However, the barrier function of the skin hinders the effective penetration of siRNA. Here, we report, a novel approach to achieve the transdermal delivery of effective siRNA doses using a complementary synergistic strategy of an ionic liquid (IL) and cationic liposome (CL). Microphthalmia-associated transcription factor (MITF) siRNA molecules were formed through electrostatic adsorption of the IL and CL to form positively charged nanocomposites, which were named IL-CL/p-siM. IL-CL/p-siM has a particle size of 171.47 nm, ζ-potential of 29.94 mV, high encapsulation rate of 92.11 %, and pH-sensitive release properties. In vitro studies on porcine skin confirmed the additive/synergistic effect of this strategy in enhancing epidermal and dermal penetration. This combination enabled superior transfection efficiency and cell viability while inhibiting melanin synthesis in skin melanocytes by downregulating the expression of genes downstream of MITF, namely tyrosinase-related protein-1, tyrosinase, and tyrosinase-related protein-2, which are associated with the melanocortin 1 receptor. We also conducted clinical studies that demonstrated its potential in treating melasma and its anti-melanotic efficacy. To summarize, IL-CL/p-siM represents a simple, personalized, and scalable platform for effective local delivery of siRNA to treat skin complications.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Shengcheng Wu,Tong Yun,Chunqiu Zheng,Xinyi Luo,Peng Qiu,Hongyang Yu,Qiwei Wang,Jinwei Gao,Xubing Lu,Xingsen Gao,Lingling Shui,Sujuan Wu,Jun-Ming Liu
Serious open-circuit voltage (Voc) loss originating from nonradiative recombination and mismatch energy level at TiO2/perovskite buried interface dramatically limits the photovoltaic performance of all-inorganic CsPbIxBr3–x (x = 1, 2) perovskite solar cells (PSCs) fabricated through low-temperature methods. Here, an ionic liquid (IL) bridge is constructed by introducing 1-butyl-3-methylimidazolium acetate (BMIMAc) IL to treat the TiO2/perovskite buried interface, bilaterally passivate defects and modulate energy alignment. Therefore, the Voc of all-inorganic CsPbIBr2 PSCs modified by BMIMAc (Target-1) significantly increases by 148 mV (from 1.213 to 1.361 V), resulting in the efficiency increasing to 10.30% from 7.87%. Unsealed Target-1 PSCs show outstanding long-term and thermal stability. During the accelerated degradation process (85 °C, RH: 50∼60%), the Target-1 PSCs achieve a champion PCE of 11.94% with a remarkable Voc of 1.403 V, while the control PSC yields a promising PCE of 10.18% with a Voc of 1.319 V. In particular, the Voc of 1.403 V is the highest Voc reported so far in carbon-electrode-based CsPbIBr2 PSCs. Moreover, this strategy enables the modified all-inorganic CsPbI2Br PSCs to achieve a Voc of 1.295 V and a champion efficiency of 15.20%, which is close to the reported highest PCE of 15.48% for all-inorganic CsPbI2Br PSCs prepared by a low-temperature process. This study provides a simple BMIMAc IL bridge to assist bifacial defect passivation and elevate the photovoltaic performance of all-inorganic CsPbIxBr3–x (x = 1, 2) PSCs.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Chenxi Gao,Xiaoqing Qu,Lei Fu,Jia Chen,Yuefeng Chu,Hongdeng Qiu
Bacterial resistance to antibiotics has rendered bacterial infections an escalating threat to public health, prompting numerous researchers to strive towards the development of novel antimicrobial agents. Designable ionic liquids (ILs) have gained increasing prominence in the field of antibacterials. However, certain ILs exhibit suboptimal antimicrobial activity. In this study, we synthesized ionic liquid-derived carbon dots (IL-CDs: VOIMBr-CD) through vinyl and epoxy group reactions, resulting in enhanced antimicrobial efficacy. The VOIMBr-CD retains the antibacterial structure characteristic of ILs, including a positively charged imidazolium group and long alkyl chain. Moreover, VOIMBr-CD demonstrates selective antibacterial action against Staphylococcus aureus ( S. aureus ) while effectively inhibiting S. aureus biofilm growth. Notably, the antibacterial efficacy of VOIMBr-CD against methicillin-resistant Staphylococcus aureus ( MRSA ), surpasses vancomycin (Van). We conducted comprehensive investigations into the selective antibacterial mechanism of VOIMBr-CD which primarily involves electrostatic interactions, hydrophobic interactions, as well as generation of reactive oxygen species (ROS) within bacteria cells. In vivo experiments demonstrated that VOIMBr-CD significantly alleviate inflammation, facilitated collagen deposition and angiogenesis, and effectively expedited wound healing in MRSA -infected mice models; thus, highlighting their potential as therapeutic candidates for diseases resembling MRSA infection-like conditions. Importantly, this work presents a novel approach utilizing IL-based materials for developing effective antibacterials thereby offering new insights into the application prospects of IL-derived materials.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Zongkai Liu,Haofan Zhao,Bingquan Hua,Yan Wang,Tianyou Lu,Meng Guo,Guanying Dong,Junyong Zhu,Yatao Zhang
Defective MOFs have been identified as promising candidates for efficient membrane-based separation applications. However, the utilization of defective MOFs in membrane gas separation is still in its infancy due primarily to the inefficient molecular differentiation induced by structural defects. Herein, we report a strategic combination of ionic liquid (IL) and defective UiO-66-NH2 MOF to ameliorate the CO2/N2 selectivity within the highly permeable PIM-1 polymer. Characterizations and analysis have shown that postmodification of defective UiO-66-NH2 with IL greatly improved its dispersion and compatibility within PIM-1. Meanwhile, the CO2-philic nature of IL facilitated increased adsorption of CO2 molecules, enabling them to pass rapidly through the transport channels in defective MOF. As a result, the optimal membranes demonstrated a concurrent enhancement in both the CO2 permeability and the CO2/N2 ideal selectivity, which were 197.1% and 24.9% greater than those of PIM-1, respectively. Additionally, the complex Lewis acid/base and hydrogen bonding interactions among IL/defective MOF/PIM-1 have ensured that the resulting membranes possess long-term operational durability and significant antiaging behavior. This deliberate matching between IL and defective MOFs has well circumvented the potential limitation of defective MOFs for carbon capture, with potential applications in other areas.
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JOURNAL OF CHEMICAL THERMODYNAMICS
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2025
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IF 2.2
Xianming Zhang,Yanping Li,Yongli Wu,Yunfei Wang,Panpan Yan,Zhilei Zheng,Hongyu Peng,Yuexin Chu
Liquid–liquid equilibrium (LLE) for the binary systems of 1-octene +1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]), 1-octene +1-butyl-3-methylimidazolium acetate ([BMIM][Ac]), 1-octene +1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]), 2-hexanone + [EMIM][Ac], and 2-hexanone + [BMIM][Ac], and the ternary systems of 1-octene +2-hexanone + [EMIM][Ac], 1-octene +2-hexanone + [BMIM][Ac], and 1-octene +2-hexanone + [BMIM][BF 4 ] were measured at 298.15 K, 303.15 K and 313.15 K under 101.3 kPa. The solute distribution coefficient ( D ) and selectivity ( S ) were calculated to investigate the efficiencies of [EMIM][Ac], [BMIM][Ac], and [BMIM][BF 4 ] as solvents. Moreover, the temperature dependencies of D and S were investigated in this study. NRTL and UNIQUAC models were applied to correlate the experimental LLE data.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Meng Cheng,Xingtai Yan,Wenjing Liu,Ruihua Li,Gangfu Song
Designing and synthesizing sustainable adsorbents for the separation and recovery of gold from waste resources has significant importance to alleviate the problems of the scarcity of resource and environmental pollution. Herein, a cyanide-functionalized ionic liquid-modified polymer (CPR-CN) was prepared by a simple one-step process for gold (Au(III)) recovery. The introduction of cyan group and cationic imidazolium ring gives CPR-CN significant adsorption ability with 1450.41 mg/g. Kinetics study suggested that the uptake of Au(III) onto CPR-CN could be commendably matched by the pseudo-second order kinetic model and it took only 10 min to reach adsorption equilibrium. The CPR-CN had a remarkable selectivity towards Au(III) for it presented much overwhelming affinity for Au(III) than that for other base metal ions such as K(I), Co(II), Cu(II), Ca(II), Mg(II), Al(III) and Fe(III), thus it was successfully applied to recover Au(III) from e-waste leaching solution. Besides, the CPR-CN displayed preferable reusability, and the possible mechanism of CPR-CN for Au(III) was investigated with the aid of several characterization techniques. These performance of CPR-CN indicates it can serve as an attractive adsorbent to efficiently and selectively separate and recover Au(III) from waste.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Mengqian Fu,WeiLu Ding,Qianmeng Zhao,Zhenyang Xu,Wei Hua,Yunong Li,Zifeng Yang,Li Dong,Qian Su,Weiguo Cheng
CO 2 capture and conversion to high-value-added products is critical for the purposes of environmental preservation and carbon resource utilization. In this study, a novel class of porous poly(ionic liquid)s has been synthesized, incorporating dual hydrogen bond donors (amide and hydroxyl groups) and nucleophiles (Br - ) as multiple effective active sites for the cycloaddition reaction between CO 2 and epoxides. The presence of dual hydrogen bond donors not only provides two active sites for synergistic catalysis with epoxides but also enhances the capacity for CO 2 adsorption. Comprehensive characterization has been conducted to elucidate the structural features and properties of these innovative materials. By regulating the ratio between ionic liquid monomer and divinylbenzene, a hierarchical porous structure favorable for the reaction was constructed, resulting in optimized catalytic activity comparable to that of bulk ionic liquid monomers. Furthermore, this catalyst exhibits remarkable structural stability with minimal activity loss even after five consecutive use cycles. Combining density functional theory calculations with in-situ Fourier transform infrared spectroscopy analysis, the catalytic mechanism was proposed that the dual hydrogen bond donors and Br - synergistically promote ring-opening reactions of epoxides, while amide groups serve as basic sites to enhance CO 2 adsorption during the reaction process.
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Food and Bioprocess Technology
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2024
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IF 5.3
Peng Lincai,Zhou Gaojin,Jiang Wanhang,Chen Yu,Wu Tong,Yuan Ke,Ali Ahmad,Yao Shun
In the context of potential applications in food field, a new glucose biosensor was constructed by combining the advantages of tropine-amino acid based ionic liquids (TABILs), glucose oxidase (GOx), silver nanoparticles and multi-walled carbon nanotubes (MWCNTs). The effect of various ILs on GOx and their intermolecular interactions were systematically discovered, and then the different modified electrodes were fabricated and evaluated. As the result, the TABIL formed by the cation of butyl substituted tropinol and anion of serine ([BuTr][Ser]) was found to be the most ideal; the [BuTr][Ser]/Ag/MWCNTs fabricated electrode exhibited the largest active area, which was 1.68 times larger than that of the bare electrode. After further optimization, the electrode was modified with 5 mg/mL of GOx to detect glucose in phosphate-buffered saline (PBS, pH = 7), at a working potential of −0.45 V and 25°C. The GOx coverage was 2.16×10 −9 mol/cm 2 , the electron transfer rate ( ks ) was 0.91 s −1 , and the Michaelis-Menten constant ( \({\text{K}}_{\text{m}}^{\text{app}}\) ) was 5.10 mM. The test results were satisfied for actual honey samples, indicating that it had the good performance for glucose detection in potential foods. Graphical
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