CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Zhentao Zhang,Min Sang,Yucheng Pan,Zimu Li,Shuai Liu,Jianpeng Wu,Xinyi Wang,Shilong Duan,Xinglong Gong
Traditional conductive hydrogels face challenges in environmental stability and mechanical limitations, constraining their applications in wearable devices. Here, we present a novel organic ionic gel by the construction of PVA/EG double polymer network and ionic liquid, named POIG. It showcases outstanding tensile strength (3.01 MPa) and extensibility (820 %). POIG excels in both low and high-speed impacts, dissipating over 90 % of energy in low-speed impacts and outperforming commercial foam five times in high-speed impacts (1.4 kJ/m). The addition of an ionic liquid in POIG creates a stable, uniform, and highly ordered internal conductive structure, leading to ultra-low strain responsiveness (0.2 %), ultra-fast response times (≈10 ms), high linearity (R 2 = 0.999), and excellent sensing performance. High stability is also confirmed through 4000 cycles of both tensile and compression testing. Additionally, we developed a real-time sign language recognition system using deep learning, accurately identifying ten gestures with 98.5 % accuracy. This research offers a durable and innovative organic material for future wearable technology and smart devices.
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MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Mengyi Ba,Yanli Song,Wen Li,Yuanyuan Zhang,Haixin Liu,Xiang Xu,Zhiqiang Cai,Shaoqiang Hu,Tao Sun
In this work, a novel pillar[6]arene bonded with octyl-imidazolium ionic liquids (IMP6A-C4) as a stationary phase for gas chromatographic (GC) separations was designed, synthesized, and characterized. The IMP6A-C4 capillary column, prepared by the static coating method, had medium polarity (1 3 3) and relatively high column efficiency of 4982 plates/m determined by n-dodecane at 120 ℃. As demonstrated, through the separation of the mixture of 17 aliphatic analytes and the mixture of 20 analytes with different polarities, the IMP6A-C4 column exhibited privileged retention and high resolving capacity for H-bonded and aromatic analytes, suggesting advantages over the P6A-C4 column and common polysiloxane HP-5 and HP-35 columns. Strikingly, it implemented high resolutions with good peak shapes for isomer mixtures of phenols , anilines, and benzaldehydes . These findings demonstrated that the excellent resolving performance of the IMP6A-C4 column can be attributed to the comprehensive interactions of its rigid 3D aromatic cavities and polar imidazolium ionic liquids, including π-π, ion-π, H-bonding, dipole–dipole interactions. On the other hand, the IMP6A-C4 capillary column exhibited good repeatability and reproducibility with the RSD% values in the range of 0.01–0.03% for run-to-run, 0.09–0.32% for day-to-day, and 2.72–5.23% for column-to-column. The satisfactory separation performance reveals the promising prospects of the IMP6A-C4 stationary phase in separation science .
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Catalysis Science & Technology
·
2025
·
IF 4.2
Hanyu Guo,Wei-Wei Lu,Peng Xu,Jie Luo,Kaisheng Yao,Haoyan Cheng,Hao Hu,Kunpeng Sun
Metal e Metal halide perovskites (MHPs) have stand out as a photocatalyst because of their excellent optical property. However, the main drawbacks of MHPs are their instability resulted from their ionic nature, and the toxicity of Pb in popular lead halide perovskite. To solve these problems, in this work, we choose Cs3Bi2Br9 as a typical lead-free MHPs, and prepared Cs3Bi2Br9 using ionic liquids 1-decyl-3-methylimidazolium bromide ([Dmim]Br) as the surface ligands and bromine source through ligand-assisted reprecipitation method. The prepared Cs3Bi2Br9 NCs remained stable under light, heat and moisture, which is attributed to the anchoring of ionic liquid [Dmim]Br on the nanocrystalline surface to passivates the harmful defects. Then, we select oxidation of benzyl alcohol as a representative model reaction and investigated the photocatalytic performance of Cs3Bi2Br9 NCs. Under the illumination of visible light, benzyl alcohols can be transformed at the presence of Cs3Bi2Br9 NCs into corresponding aldehydes with near 100% selectivity and 99.64% conversion in 1 h. The radical scavenging experiments, spectroscopic analysis, and EPR measurements confirmed that the main active species responsible for highly selective oxidation were singlet oxygen 1O2, which were proved to be generated from the transformation of superoxide radicals •O2−. This work is expected to provide insights for extending the design and photocatalytic applications of lead-free MHPs NCs.
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LANGMUIR
·
2025
·
IF 3.9
Jie Qi,Miaomiao Qing,Yang Yang,Siwei Chen,Yong Zhang,Na Wang,Hongsheng Lu,Zheng Zhang
To balance the stability and dissolution of polyacrylamide (PAM), emulsion drag reducers dominate the successful operation of volumetric fracturing. Herein, a pH-switchable four-tailed ionic liquid surfactant (OA/Cyclen) is synthesized by oleic acid (OA) and 1,4,7,10-tetraazacyclododecane (Cyclen). The four-tailed structure of OA/Cyclen enhances the stability of the emulsion polymerization reactor and supplies enough switchable sites for triggering the intensified release of the PAM emulsion. The surface activity of OA/Cyclen varied under different pH conditions due to the interionic proton transfer between OA and Cyclen. The OA/Cyclen-stabilized monomer emulsion thus posed controllable stability. A pH-switchable PAM emulsion is produced through polymerization of this monomer emulsion, which shows a storage stability for 60 days at a pH value of 7.5. It is completely released to the aqueous solution within 20 s at a pH value of 12.03, achieving a maximum viscosity of 63 mPa·s at a polymer concentration of 0.5 wt % and a drag reduction of 61.2% at a polymer concentration of 0.05 wt %. The construction of OA/Cyclen is expected to supply an alternative for the development of drag reducer products.
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Foods
·
2025
·Vol. 14
·期 6
·1058
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IF 5.1
Xingran Kou,Kangning Ma,Xin Huang,Hui Wang,Qinfei Ke
In the process of ginger deep processing, a lot of waste is generated which is rich in biopolymers and active ingredients such as cellulose, starch, gingerol, and gingerol, but its low utilization rate leads to waste of resources. In this study, ginger waste residue, cellulose, and bioactive substances were spun into fiber materials by wet electrospinning technology with 1-butyl-3-methylimidazole acetate ([Bmim]Ac) as solvent. Fiber plasticization and [Bmim]Ac removal were achieved by dynamic deionized water coagulation bath. Scanning electron microscopy (SEM) and tensile strength analysis showed that the obtained GC-1 and GC-2 films have a non-uniform diameter, with a clear fiber structure and strong tensile strength. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) confirmed that cellulose transforms from type I to type II crystal structure, and [Bmim]Ac is effectively removed. The inhibition rate of 6-Shogaol-impregnated GC film againstEscherichia coliandStaphylococcus aureuswas 99%. The experiment of strawberry preservation verified the potential of GC film in food preservation. In this study, the high-value utilization of ginger waste in food packaging was realized by preparing antibacterial electrospun fiber films.
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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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Nengjie Feng,Linyan Cheng,Yukun Zhang,Yujie Tao,Hui Wan,Chong Chen,Guofeng Guan
Cycloaddition, as a sound strategy for high-value utilization of carbon dioxide (CO 2 ), has been long pursued, wherein the challenging substrate activation process is a top priority for devising novel heterogeneous catalysts. In this study, a guanidine-based ionic liquid tethering –NH 2 groups was designed and integrated with chromium (III) terephthalate (MIL-101(Cr)) through the coordination with unsaturated Cr 3+ centers. The developed [NH 2 TMG]Br@MIL-101(Cr) (TMG represents tetramethylguanidine) decorated with plentiful basic functional groups created a fast channel for the capturing and binding of CO 2 , while the highly-accessible Lewis acidic sites (Cr 3+ ) and hydrogen bond donors (N + -H) embedded within the nanocomposite synergized to activate the epoxide, synchronously. Under the reaction conditions optimized by response surface methodology (RSM) (103.2 °C, 1.03 MPa, 1.85 h, and 2.53 wt% of catalyst), a satisfactory chloropropene carbonate (CPC) yield of 98.2 % with a selectivity of 99.2 % were achieved. We further demonstrated the heterogeneity and recyclability of [NH 2 TMG]Br@MIL-101(Cr), and ascertained the substrate expansibility. Moreover, the in-situ diffuse reflectance infrared Fourier-transform spectra (DRIFTS) and density functional theory (DFT) computations afforded deep insights into the proposed multiple-site activation mechanism for CO 2 coupling. This study highlighted an innovative pathway for constructing durable IL@MOFs nanocomposites and presented a tangible route to effectively converting CO 2 .
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PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Siyu Liu,Chuanpeng Li,Xuanlin Qiu,Qiangliang Yu,Chufeng Sun,Yu Liu,Shuang Sun,Shuangshuang Yang,Xingwei Wang,Chen Zhao,Bo Yu,Meirong Cai,Feng Zhou
MXene's excellent corrosion resistance and self-lubricating properties allow it to be used as a filler in organic coatings to improve the protective properties of organic coatings. However, the random distribution of MXene (MX) in the coating can result in coating defects that make it impossible to meet higher protection requirements. To overcome this deficiency, this study builds upon previous research by employing a simple and environmentally friendly electrophoretic deposition technique. MX functionalised by ionic liquids (BTA-P 4444 -Lig) and protonated by HCl (f + -MX-P) is made to align in parallel in waterborne acrylic coatings (WAA) under the action of electric field force. This meets the higher protection requirements of organic coatings. Electrochemical tests show that the |Z| f=0.01 of f + -MX-P/WAA is 3 to 4 orders of magnitude greater than WAA. Parallel distribution of f + -MX-P in WAA is utilized to forma more continuous, uniform physical barrier and “inverse nacre effect”, which greatly extends the diffusion pathway for corrosive medium. Meanwhile, XPS testing showed that BTA-P 4444 -Lig loaded on the f + -MX-P surface could form a adsorbed layer on the metal surface. The “inverse nacre effect” formed by MX in WAA and the synergistic effect of BTA-P 4444 -Lig enhanced the corrosion resistance of the f + -MX-P/WAA. The outcomes of the friction testing indicate that the coefficient of friction for the f + -MX-P/WAA is lower at 0.103. This value is notably lower than that of WEP, which has a friction coefficient of 0.843. This is due to the fact that the parallel distribution of f + -MX in the coating has a certain inclination to the direction of crack propagation which effectively hinders crack propagation during friction. This reduces coating damage caused by crack propagation during friction, resulting in excellent wear resistance of f + - MX-P/WAA.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2017
·Vol. 410
·期 2
·573-584
·
IF 3.431
Liu Jiawei,Liang Yixun,Shen Jiwei,Bai Quan
Polymeric ionic liquids (PILs) with 1-vinyl-3-ethylimidazolium cations and two different anions of Br − and PF 6
− were assembled onto the surface of graphene (G) nanosheets. The derived two composites, i.e., PIL(Br)-G and PIL(PF 6 )-G, were further efficiently immobilized onto the surface of silica nanoparticles via self-assembly technique. The obtained two PIL-G/SiO 2 nanocomposites exhibited diverse adsorption performances toward proteins through adjusting the anions of PILs. Electrostatic attractions between proteins and the nanocomposites dominated protein adsorption, while the presence of PF 6
− anions weakened electrostatic interactions and deteriorated the selective adsorption of target protein, i.e., bovine serum albumin (BSA) in this case. Specifically, PIL(Br)-G/SiO 2 nanocomposite displayed high selectivity toward BSA and a high adsorption efficiency of ca. 98% was achieved for 100 mg L −1 BSA in a Britton-Robinson (B-R) buffer at pH 5. HPLC analysis demonstrated the selectivity of PIL(Br)-G/SiO 2 nanocomposite toward BSA in the presence of abundant hemoglobin and cytochrome c. The practical applicability was verified by performing selective isolation of human serum albumin (HSA) from human whole blood.
Selective isolation of human serum albumin from blood by polymeric ionic liquid assembled graphene immobilized silica nanocomposite with tunable anions
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JOURNAL OF CHROMATOGRAPHY A
·
2017
·
IF 3.981
Guifen Zhu,Xia Gao,Xiaolong Wang,Jianji Wang,Jing Fan
To illuminate the influence mechanism of anionic structure of ionic liquids (ILs) on the adsorption performance of surface molecularly imprinted polymers (MIPs), in this work, six newly designed MIPs were prepared on the surface of amino-poly(styrene-divinylbenzene) particles by using imidazolium ILs with the same cation [C 4 mim] + but different anions (Cl, CH 3 SO 3 , PF 6 , BF 4 , C 4 F 7 O 2 , C 4 F 9 SO 3 ) as template molecules, methacrylic acid as functional monomer, and ethylene dimethacrylate as cross-linker. The resulting MIP materials were characterized by IR and SEM, and the influence of hydrogen bond accepting ability of anions on the adsorption performance of the MIPs for the ILs was investigated in acetonitrile. It was found that adsorption capacity of the MIPs towards the ILs decreased in the order MIP [C4mim][Cl] > MIP [C4mim][C4F7O2] ≥ MIP [C4mim][BF4] and MIP [C4mim][CH3SO3] > MIP [C4mim][C4F9SO3] > MIP [C4mim][PF6] , which is in good agreement with the ability of anions of the ILs to form hydrogen bonds. Ultraviolet, 1 H-NMR and 35 Cl-NMR spectroscopy was then used to study the interactions of anions of the ILs with the functional monomer. It was found that the hydrogen bond interaction between anions of the ILs and acidic proton of the functional monomer was the main driving force for the high adsorption selectivity of the imprinted polymers, and the stronger hydrogen bond interaction indicates higher binding capacity and higher selectivity of the polymers towards the ILs. It was also verified that the ILs with stronger hydrogen bond accepting ability of anions could be selectively extracted by the corresponding IL-MIPs. These results may provide new insight into the recognition mechanism of MIPs for ILs, and are also useful for the rational design of this new class of imprinting materials.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Shun Lu,Chaohu Xiao,Min Yin,Yang Jin,Shuqin Xu,Qi-Meige Hasi,Yuhan Zhang,Lihua Chen
Solar-driven interfacial evaporation (SIE) is a promising fresh water acquisition technology to address the global water resource shortage. Therefore, solar evaporators with efficient photothermal conversion efficiency and multifunctional purification capabilities are still in high demand. At present, a variety of photothermal conversion materials have been explored, however, there are few studies on integrating interfacial evaporation and photocatalytic capabilities into one solar steam generation system collaboratively. In this work, a new double-layered solar interfacial evaporator (MXene/PPy-ACA) was fabricated by using polymeric ionic liquid grafted attapulgite (ATP-PIL) as the matrix and modified the upper surface by MXene and polypyrrole (PPy). The evaporator can not only carry out seawater desalination efficiently, but also has good photocatalytic degradation effect on organic dyes. The MXene/PPy-ACA achieves an evaporation rate of 1.53 kg m −2 h −1 and corresponding to an efficiency of 92.17 % under irradiation of 1 sun. In addition, duing to the ionic repulsion effect of ATP-PIL, the MXene/PPy-ACA possesses good salt resistance. When tested in 20 wt% high brine, the evaporation rate is measured to be 1.40 kg m −2 h −1 . Moreover, owing to the superb photocatalytic properties of MXene and PPy, the MXene/PPy-ACA exhibits remarkable photocatalytic efficiency towards organic dyes, achieving degradation rates of 94.9 %, 67.49 %, and 65.11 % for methyl orange (MO), rhodamine B (RhB), and methylene blue (MB), respectively. The prepared interfacial evaporation system can also run stably in acid and alkali solution, and has a good practical application prospect. This study may offer an alternative approach in achieving clean water via SIE of seawater and complex wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Bowen Li,Shaojuan Zeng,Chongyang Jiang,Guilin Li,Lu Bai,Fei Xu,Xiangping Zhang
Low concentration carbon dioxide (CO 2 ) capture from air or confined spaces currently faces significant challenges, such as relatively poor dynamic adsorption breakthrough performance and cyclic stability. In our previous work, functionalized ionic liquid (IL) tetraethylammonium glycine ([N 2222 ][Gly]) and porous molecular sieve (SBA-15) were combined to synthesize porous amino acid IL composite 60 wt% [N 2222 ][Gly]@SBA-15 with microporous and ultra-microporous structures, which provide a new pathway for low concentration CO 2 capture. In order to further obtain the dynamic CO 2 adsorption breakthrough performance of this material under simulated actual working conditions, the effects of temperatures, relative humidity (RH) and CO 2 concentrations on CO 2 adsorption and desorption breakthrough performance of 60 wt% [N 2222 ][Gly]@SBA-15 in a fixed-bed column were systematically studied in this work. The results indicated that CO 2 adsorption capacity is up to 1.81 mmolCO 2 /g-adsorbent at 298.15 K, 1 bar and 0 % RH under 1 vol% CO 2 -containing gas mixture balanced with N 2 and reaches 2.44 mmolCO 2 /g-adsorbent at 15 % RH due to the mechanism change of CO 2 reaction with primary amine from 2: 1 under dry gas to 1: 1 stoichiometry in the presence of moisture. Moreover, the adsorbent maintains good cyclic adsorption-desorption performance. Further, CO 2 adsorption breakthrough behaviors were well fitted by Avrami kinetic model, and the CO 2 adsorption rate of 60 wt% [N 2222 ][Gly]@SBA-15 was controlled by intra-particle diffusion. This work implied that IL-modified adsorbents have great potentials for low concentration CO 2 capture applications.
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