REACTIVE & FUNCTIONAL POLYMERS
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2025
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IF 5.1
Zhengtao Wu,Tianhao Chen,Ruiqi Song,Yayun Liu,Bingbin Zhang,Li Jiang,Haitao Wu,Yanmao Dong,Hui Miao,Yan Yuan
Imidazolium ion-based ionic liquids (ILs) have been employed to enhance the dispersion stability of graphene in composite materials, leveraging their π-π conjugation and cation-π interactions with graphene. In this study, a UV-curable ionic liquid monomer (UV-IL monomer), 1-[(6-methacryloyloxy)-hexyl]-3-methylimidazolium chloride, was successfully synthesized and characterized using 1 H NMR and FT-IR spectroscopy. To improve the dispersion stability and electrical conductivity of reduced graphene oxide (rGO), graphene oxide (GO) was chemically modified by grafting with an amino-functionalized ionic liquid, yielding reduced modified graphene oxide (RMGO) through covalent and non-covalent interactions. The resulting RMGO was incorporated into a UV-cured coating to fabricate a conductive sensing material. The conductive mechanism and sensing properties of the coating were systematically investigated. Results demonstrate that the conductivity of the coating arises from the synergistic effect between RMGO and the ionic liquid. The sensing coating exhibited excellent temperature responsiveness, with its response curve following a combined function derived from the Vogel-Tammann-Fulcher (VTF) equation for ionic liquids and the linear resistance-temperature relationship of graphene. These findings highlight the promising potential of this composite for temperature-sensing applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Meilin Yin,Lipeng Wang,Rui Li,Jingwei Hou,Shaokun Tang
The ecofriendly conversion of captured CO 2 is crucial for global sustainable development. However, direct conversion of CO 2 into value-added chemical feedstocks at atmospheric pressure remains challenging due to its thermodynamic stability and kinetic inertness. Herein, we report a new type of catalyst with low catalytic energy barrier, synthesized by post-modifying supercritical CO 2 -activated imine-linked triazine-based covalent organic framework (TAPT-COF) through the covalent attachment of ionic liquid (IL) and coordination of Zn ion within its pores. The resulting catalyst, referred to as IL-Zn-COF, exhibits CO 2 adsorption capacity of 31.2 mg g −1 at 298 K, enabling CO 2 enrichment near active sites and supporting direct CO 2 conversion. Consequently, IL-Zn-COF achieves a high cyclochloroallyl carbonate yield of 99.0 % at 1 bar and 60 °C without co-catalysts. Experimental results and density functional theory (DFT) calculations confirm that the cooperation of Zn 2+ and Brˉ dramatically expedites the rate-limiting step of cycloaddition, outperforming the individual catalytic components of ZnCl 2 and ILs. Compared with the physically impregnated system (a mixture of IL and Zn-coordinated COF), IL-Zn-COF demonstrates an 16.1 % increase in catalytic activity for cycloaddition. Importantly, the catalyst maintains its activity over ten cycles. Additionally, IL-M-COFs (M = Mn, Co, Ni) are also synthesized to further evaluate the effects of different metal ions on CO 2 capture and conversion performance.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 9
·1-11
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IF 2.8
Liu Xiang,Deng Yuxin,Wang Ping,Tang Hongyu,Li Shuangqing,Xing Zheng
The utilization of hydrogels in the domain of flexible capacitors (FCs) and multifunctional sensors (MSs) has attained considerable prevalence. However, balancing the various properties of such versatile hydrogels remains a major challenge. In the present study, a novel xIL/PAM/SA dual-network hydrogel composed of polyacrylamide/sodium alginate (PAM/SA) and an ionic liquid (IL) 1-Butyl-3-methylimidazolium hydroxide ([BMIM][OH]) is proposed. The OH − in the IL inhibits the protonation of -NH 2 groups on the polymer chain and avoids the reduction of the number of hydrogen bonds in the system due to the formation of -NH 3+ , thus enhancing the strength of the network. The results showed that the series of tough hydrogels had high tensile strength (386.64 kPa), elongation at break (338.16%), and toughness (670.83 kJ/m 3 ). Moreover, the rich functionality such as capacitive performance (198.5 mF/cm 2 ), water retention performance (LR = 25.4%), temperature sensitivity (GF = 2.12), and strain sensitivity (GF = 4.56), make it have broad application potential. This work improves the traditional dual-network hydrogels by ionic liquids (ILs) and provides a feasible idea for the design of multi-functional tough conductive hydrogels.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Zongmin Hu,Chen Sun,Yimin Xuan
Thermoelectric technologies (TEs) offer immense potential for waste heat recovery and energy storage. However, the practical application of current TEs has been severely hampered by potential performance degradation in extreme environments, particularly at high temperatures, due to electrolyte flammability or poor carrier mobility. The development of high-temperature, high-performance TEs is crucial for broadening their operational range and enabling diverse applications. Here, practical high-temperature high-voltage thermal charging cells (HHTCCs) are reported, facilitated by a heat-resistant trifluoromethanesulfonate-based Ca–Li dual-cationic ionic liquid electrolyte containing functionalized AmimCl solvent, together with a thermotolerant composite membrane, PEN(polyphenylene-ether-nitrile)@ZrBDC-F-4%. The dual-cation mechanism enables high thermal voltage through cooperative energy storage, while the functionalized AmimCl accelerates the mobility of Ca 2+ and Li + ions by weakening the surrounding shielding effect. Additionally, the anionophilic ZrBDC-F-4% nanoparticles in the composite membrane enhance carrier migration. As a result, the HHTCCs exhibit an impressive thermal voltage of 1.138 V, a remarkable thermopower of 15.3 mV K −1 , and an outstanding Carnot-relative efficiency of 9.56% over an unprecedented temperature range from 328.15 to 393.15 K, demonstrating the excellent safety and feasibility of HHTCCs. This work expands the service-temperature range of i-TEs, holding significant promise for high-temperature, high-performance waste heat harvesting.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Shuyu Zhang,Yu Luo,Di Yu,Xianfeng Guan,Wanzhen Wu,Cuicui Li,Guangpeng Ma,Xinpu Zhou,Shuang Wang
Quaternary ammonium (QA) group is widely used in high-temperature proton exchange membranes (HT-PEMs) because of its own strong basicity and ability to form QA–diphosphate ion pairs with phosphoric acid (PA). In this work, compared with other introductions of QA groups in membranes, by adding QA sites to the polybenzimidazole (PBI) main chains, not only PA retention is improved but also the imidazole N–H sites are conserved, which allow them to participate in proton transfer and further improve proton conductivity. QMPBI was prepared by introducing QA groups into the main chains of methyl-containing polybenzimidazole (MPBI) through a series of modifications in order to improve PA uptake and retention. Then, QMPBI and presynthesized polymeric ionic liquid (PIL) containing two nitrogen-positive ion pairs undergo cross-linking to generate composite membranes with different quaternization ratios-QMPBI-X-PIL (where X = 30, 50, 70%). It is experimentally verified that the QMPBI-70%-PIL membrane at a quaternization ratio of 70% has the best proton conductivity and PA retention rate. The QMPBI-70%-PIL membrane had a proton conductivity of 126.22 mS cm–1 at 180 °C and a maximum residual mass of 85.71% at 160 °C/0% RH after a 240 h PA retention test. At 160 °C without humidity, the peak power density of the QMPBI-70%-PIL membrane could reach 454.89 mW cm–2. In conclusion, QMPBI-70%-PIL membranes are expected to be widely used in HT-PEMs.
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CORROSION SCIENCE
·
2025
·
IF 8.5
Fengting Li,Wentao Qu,Yunchao Peng,Liqiang Yang,Li Wang,Huiling Su,Miantuo Li,Zhikun Wang,Jingyue Wang,Yu Fu,Songqing Hu
In this study, we developed ionic liquid-modified nitrogen-doped carbon dots (IL-NCDs) with enhanced π-π interactions, effectively addressing the aggregation issue of conventional carbon dots in strong acidic conditions. The synthesized IL-NCDs demonstrated superior dispersibility and long-term protective performance in 1 M HCl, achieving a corrosion inhibition efficiency of 97.34 % at 60 mg/L and maintaining protection for over 20 days. The optimized surface charge and increased active sites facilitated the formation of a dense protective film, offering an efficient and eco-friendly solution for metal corrosion protection in acidic environments, with significant potential for industrial applications.
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Polymers
·
2024
·Vol. 16
·期 4
·540
·
IF 4.7
Haiyang Liao,Yeqi Xiao,Tiemin Xiao,Hongjin Kuang,Xiaolong Feng,Xiao Sun,Guixin Cui,Xiaofei Duan,Pu Shi
The emergence of novel e-textile materials that combine the inherent qualities of the textile substrate (lightweight, soft, breathable, durable, etc.) with the functionality of micro/nano-electronic materials (conductive, dielectric, sensing, etc.) has resulted in a trend toward miniaturization, integration, and intelligence in new electronic devices. However, the formation of a conductive network by micro/nano-conductive materials on textiles necessitates high-temperature sintering, which inevitably causes substrate aging and component damage. Herein, a bis-hydroxy-imidazolium chloride salt as a hard segment to synthesize a waterborne polyurethane (WPU) adhesive is designed and prepared. When used in nano-silver-based printing coatings, it offers strong adherence for coatings, reaching 16 N cm−1; on the other hand, the introduction of chloride ions enables low-temperature (60 °C) chemical sintering to address the challenge of secondary treatment and high-temperature sintering (>150 °C). Printed into flexible circuits, the resistivity can be controlled by the content of imidazolium salts anchored in the molecular chain of the WPU from a maximum resistivity of 3.1 × 107down to 5.8 × 10−5Ω m, and it can conduct a Bluetooth-type finger pulse detector with such low resistivity. As a flexible circuit, it also offers high stability against washing and adhesion, which the resistivity only reduces less than 20% after washing 10 times and adhesion. Owing to the adjustability of the resistivity, we fabricated an all-textile flexible pressure sensor that accurately differentiates different external pressures (min. 10 g, ~29 Pa), recognizes forms, and detects joint motions (finger bending and wrist flexion).
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ELECTROCHIMICA ACTA
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2012
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IF 3.832
Xiuhui Liu,Zhihan Nan,Yu Qiu,Lichun Zheng,Xiaoquan Lu
A novel cholesterol biosensor was fabricated on hydrophobic ionic liquid (IL)/aqueous solution interface. The hydrophobic IL thin film played a signal amplification role because it not only enriched the cholesterol from the aqueous solution, but also immobilized matrix for cholesterol oxidase (ChOx). Prussian blue (PB) as advanced sensing materials was used as effective low-potential electron transfer mediation toward hydrogen peroxide (H 2 O 2 ) . The fabricated IL-ChOx/PB/Glassy carbon electrode (GCE) was characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammogram (CV), respectively. And it exhibited a linear response to cholesterol in the range of 0.01–0.40 mM with a detection limit of 4.4 μM. In addition, the kinetics behavior of cholesterol at IL-Chox/PB/GCE electrode was examined, and the electrocatalytic mechanism was proposed as shown in first scheme. ChOx immobilized in hydrophobic IL thin film was used as the first electrocatalyst for the cholesterol into H 2 O 2 , and the PB film onto the GCE was used as the second electrocatalyst for the 2e − reduction of the produced H 2 O 2 into H 2 O.
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INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 11
·16603-16617
·
IF 5.164
Jiuqing Liu,Cheng Wang,Qihou Li,Jie Li,Ya Chen,Feifei Song,Zikun Hong,Meng Liu,Lishun Bai,Fanli Zeng
Summary Due to its advantages in specific capacity, lithium-oxygen batteries are expected to increase the recharge mileage of electric vehicles. However, the safety and cycle stability problems of lithium-oxygen batteries have not been completely resolved. Herein, through the non-solvent-induced phase separation method combined with the in-situ hydrolysis modification strategy of tetrabutyl titanate, a type of polyetherimide (PEI) separator with typical finger-shaped pores and honeycomb-shaped supporting layer pore structure was prepared. After being infiltrated by EMIM-BF 4 ionic liquid electrolyte, the ionic conductivity of the separator can reach 0.75 mS cm −1 . Due to the low crystallinity, high thermal stability, and stable ion transport pore structure of the separators, the assembled lithium-oxygen batteries can stably cycle for more than 75 cycles under the condition of a limit of 1000 mAh g −1 . In addition, under the strategy of high-performance cathode catalysts and electrolyte additives, the application of the porous PEI separators in lithium-oxygen batteries will be further expanded.
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FOOD CHEMISTRY
·
2021
·
IF 7.514
Qing He,Zhangxing Guo,Yu Cao,Min Yang,Shun Yao
For selective adsorption of main flavonoids from crude Tartary buckwheat extract (rutin, 0.021 mg/mL; quercetin, 0.030 mg/mL; and kaempferol, 0.011 mg/mL), new ionic liquid-based sorbents were successfully prepared by encapsulating [Bmim]Br and [Bmim]Pro in regular spherical non-magnetic and magnetic microcapsules with polysulfone content of 8%, respectively. After appropriate loading process, the microcapsules were comprehensively characterized by infrared spectroscopy, thermogravimetry analysis and scanning electron microscopy. Then the separation strategy was designed to separate rutin and quercetin from kaempferol by combinational use of two kinds of IL-loaded microcapsules (ILLMs). The effects of solid–liquid ratio of ILLMs and extract, pH, time and adsorption temperature were all investigated. The experimental data fit well with the quasi-second-order kinetics model and Langmuir model. After desorption, target flavonoids were well recovered and the ILLMs showed good stability. As the result, a new IL-based separation technology for main flavonoids from food crop was developed for the first time.
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JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Liyun Kong,Jiaqi Wang,Qingpeng Gao,Xiaoqian Li,Wenbin Zhang,Ping Wang,Le Ma,Langchong He
The determination of fat-soluble vitamins and carotenoids in human serum provides reliable information for diagnosing malnutrition and for establishing appropriate intervention programs. Due to the complex composition of the biological samples, the efficient sample preparation is the key to the analysis. We report here a surface active ionic liquid (SAIL)-based dispersive liquid-liquid microextraction (DLLME) method coupled with a high performance liquid chromatography (HPLC) to determine four fat-soluble vitamins and six carotenoids in human serum simultaneously. Liquid crystal structures were formed in the extract phase. And the enrichment factor of the analytes treated by DLLME was 4 to 26 times of the traditional LLE method except lycopene. The limit of determination for these compounds was determined to be between 0.002 and 0.076 µg/mL. The accuracy was validated by the standard addition method with recoveries ranging from 82.4 to 114.1%. The intra-day and inter-day relative standard deviations were 2.76–12.63% and 4.01–13.54%, respectively. The proposed DLLME coupled with the HPLC method was successfully applied in the determination of fat-soluble micronutrients in human serum.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Ce-Ce Hu,Qiang Gao,Li-Li Chang,Dan Luo,Bo Han,Kai-Sheng Xia,Cheng-Gang Zhou
Expanding the availability of hydrophobic small-molecule probes in pure aqueous environments is an important issue likely to significantly impact their application prospects in sensing detections. The present work demonstrates for the first time that poly(ionic liquid) (PIL) can serve as a superior carrier, which not only enables hydrophobic small-molecule probes to readily disperse in pure water and but helps maximize their sensing performances. As a proof-of-concept, a hydrophobic rhodamine derivative carried by PIL, P(RhBHSA-co-META), was designed and applied for the colorimetric determination of Cu 2+ and further for CN − in fully aqueous solutions. Due to the positively charged nature of polymeric backbone, the P(RhBHSA-co-META) was highly water-soluble and could avoid non-specific bonding. Moreover, the strong inter- and intra-chain electrostatic repulsions made the P(RhBHSA-co-META) possible to be fully free and highly stretched in water, facilitating the accessibility of receptor binding sites. Excellent sensing performance of P(RhBHSA-co-META) toward Cu 2+ was achieved in terms of high sensitivity, ultrafast color/absorption response, and excellent anti-disturbance ability. Furthermore, the pre-formed P(RhBHSA-co-META)–Cu 2+ complex was also verified to be highly efficient for colorimetric determination of CN − , exhibiting high sensitivity and selectivity. This study provides a simple, effective, and extendable approach for designing water-soluble chemosensors for ion detections and other sensing applications.
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