JOURNAL OF APPLIED POLYMER SCIENCE
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2012
·Vol. 127
·期 1
·402-409
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IF 1.289
Haohua Ye,Zhanxiong Li,Guoqiang Chen,Dan Fan
Bis (1H, 1H, 2H, 2H-perfluoro-octyl)methylenesuccinate (FOM)/ethyl acrylate (EA)/methyl methacrylate (MMA) copolymer (FOME) latexes, FOM/butyl acrylate (BA)/MMA copolymer (FOMB) latexes, and FOM/octyl acrylate (OA)/MMA copolymer (FOMO) latexes were synthesized by continuous emulsion polymerization. Solution polymerization was also carried out to prepare FOMB. The influences of fluorine content and curing conditions on the surface properties of polymer films were discussed. The water and oil repellency of cotton fabrics treated with the FOM copolymers was better than that of conventional poly(fluoroalkyl acrylate)s containing the same fluorinated chain. The polymer films or the treated fabrics were characterized by Fourier transform infrared, scanning electron microscope, atomic force microscopy, thermogravimetric analysis, x-ray photoelectron spectrometry, and wide angle x-ray diffraction. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci, 2013
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JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Yusen Chen,Jie Li,Chunshan Li,Yinglong Wang,Jianguang Qi,Zhaoyou Zhu
Trioxane (Tox) is an important source of anhydrous formaldehyde, which is used in large quantities in industrial production resulting in large quantities of low concentration Tox wastewater. Liquid-liquid extraction is one of the commonly used methods for wastewater resource recycling. This study presents a method on the separation of Tox from wastewater using hydrophobic deep eutectic solvents (HDES). Firstly, Thy-BA and Thy-DA were screened from 12 HDES by extraction performance and solubility in water. The effects of different molar ratios of HDES, extraction temperature and addition of acetic acid as impurity on the extraction performance were further investigated. For the measured ternary phase data of HDES-Tox-water, the reliability of the data was verified using the Othmer-Tobias and Hand equations, and the data were fitted using the NRTL model. Quantum chemistry was used to calculate the interaction energy of HDES with Tox and to establish a correlation with the extraction efficiency. Hydrogen bonding was found to be the main force for separating Tox by electrostatic potential and interaction region indicator analysis. Molecular dynamics computing found that Thy was a substance that plays a major role in Thy-BA and Thy-DA. Ultimately, it was discovered that the chosen HDES has great recycling and thermal stability characteristics. This work explores three aspects of phase equilibrium, thermodynamics and microscopic separation mechanism revelation to support the systematic recovery of Tox wastewater.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Jiang Meng,Zhang Qinghua,Zhang Siyuan,Liu Ming,Fu Yuntian,Zhang Zhiyuan,Ai Xin,Mortazavi Bohayra,Wang Lianjun,Zhang Qihao,Makarov Denys,Jiang Wan
Thermoelectric materials offer an exceptional opportunity to convert waste heat into electricity directly, yet their widespread application remains hindered by intrinsic brittleness and poor processability. Here, we introduce a graded ball milling strategy that fundamentally enhances the mechanical robustness and processability of YbZn 2 Sb 2 -based thermoelectrics. By refining grain microstructure, increasing dislocation density, and promoting intermediate-angle grain boundaries, this approach enables the fabrication of crack-free, large-size, disc-shaped, and microscale dices while maintaining excellent thermoelectric performance. Extending this strategy to a broader class of brittle Zintl compounds, including AZn 2 Sb 2 , AMg 2 Sb 2 , and ACd 2 Sb 2 (A = Yb, Mg, Ca, Sr, Ba), we achieve a pre-formation cohesive energy of 9.1 eV atom − 1 and relatively low lattice thermal conductivity of 0.5 W m −1 K −1 in Yb 0.5 Mg 1.3 Zn 1.2 Sb 2 . Integrated with n-type Mg 3.1 Nb 0.1 Sb 1.5 Bi 0.49 Te 0.01 , the thermoelectric module achieves a conversion efficiency exceeding 10% under a 458 K temperature gradient, operating for more than 40 hours steadily. This work establishes a scalable and versatile strategy for reconciling mechanical durability with high thermoelectric performance, paving the way for next-generation thermoelectric devices with enhanced reliability and industrial viability.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Tingting Hu,Haimei Zeng,Hao Peng,Guanchao Yin,Jihong Zhang,Jun Xie,Yang Jiang
With the increasing discharge of pollutants into air, water, and soil, the rapid and sensitive detection and treatment of chemical pollutants, including toxic organic dyes and heavy metal ions, have become critical for minimizing potential threats to the ecological cycle and human health. In the current research, an in-situ degradation approach for toxic substances is proposed, combined with surface-enhanced Raman scattering (SERS). Fiber probes based on a silver nanoparticles/ silver phosphate tetrapod (Ag/ Ag 3 PO 4 ) composite were fabricated using a sequence of ion exchange, chemical reduction, and subsequent coating processes. The fiber probes were deployed for ultra-sensitive SERS detection and in situ photocatalytic degradation of dyes (specifically crystal violet (CV)) and heavy metal ions (particularly Hg 2+ ). The probes were functionalized with 4-mercaptopyridine (4-MPY) to facilitate the detection of Hg 2+ . Notably, the probes demonstrated detection limits as low as 10 −14 M for crystal violet (CV) and 4-aminothiophenol (PATP), and 10 −12 M of Hg 2+ . Under light exposure, the substrate degraded 93.2 % of CV and 98.0 % of PATP within 60 min, and 82.3 % of Hg 2+ within 30 min, as monitored in situs. Finite element method analysis suggested that the high electromagnetic field intensity generated by Ag/ Ag 3 PO 4 resulted from the close packing of Ag nanoparticles. Furthermore, the SERS fiber probes exhibited outstanding stability, selectivity, and reusability. This research suggest that the recyclable Ag/ Ag 3 PO 4 fiber probes hold significant potential for the detection and in situ monitoring of the degradation of trace environmental contaminants.
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CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Zhipeng Zhang,Yao Yin,Kai Liang,Ranzhao Shen,Xu Fan,Bihe Yuan
The high flammability and severe dripping behavior of ethylene-vinyl acetate (EVA) limit its widespread application. It remains a persistent challenge to enhance the flame retardancy and smoke suppression performance of EVA composites while maintaining their tensile properties. In this study, a microencapsulated P/N/B-based flame retardant, referred to as MBPAPP, was synthesized via a one-pot method. The flame retardant consists of a melamine-boric acid composite (MA-BA, shell) and piperazine pyrophosphate (PAPP, core). At a loading of 20 wt% MBPAPP, EVA/MBPAPP composite achieves a UL-94 V-0 rating without dripping. In the cone calorimetry test, compared with EVA/PAPP, EVA/MBPAPP exhibits reductions in the peak heat release rate (50.5 %), total heat release (16.9 %), total smoke production (17.1 %), and the peak of CO content (52.5 %). This is attributed to the fact that EVA/MBPAPP forms a boron-containing char layer composed of B-O and B-N structures, contributing to the enhancement of compactness and thermal stability. Moreover, compared with PAPP, microencapsulation enhances the compatibility between modified MBPAPP and EVA, mitigating the deterioration of tensile properties in the composite.
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American Journal of Translational Research
·
2025
·Vol. 17
·期 3
·2178
·
IF 1.6
Yu Zhang,Fang-Mei Liu,Cun-Yu Li,Xue-Jiao Leng,Yun-Feng Zheng,Guo-Ping Peng
Objective: Qingkailing Injection (QKLI) is a traditional Chinese medicine injection mainly used for sedation, heat clearing, and other treatments. However, recent clinical studies have shown a risk of pseudo-allergic reactions. The purpose of this study is to elucidate the underlying mechanism of QKLI-induced mast cell degranulation in Laboratory of Allergic Diseases 2 (LAD2) and to validate QKLI-induced activation of guinea pig IgE-independent allergic responses. Methods: Levels of β-hexosaminidase (β-Hex), histamine (His), and complement pathway-related indicators in guinea pigs and LAD2 cells were assayed using the Enzyme-linked Immunosorbent Assay (ELISA). The release rates of β-Hex and His from LAD2 cells were measured using the o-phthalaldehyde (OPA) fluorimetric method. The antagonist for complement component 3a (C3a) receptors, SB290157 and siRNAs were used to inhibit the C3a pathway and the Mas-related G-protein-coupled receptor X2 (MRGPRX2) pathway. The MRGPRX2 pathway and its downstream proteins were detected by Western Blot (WB). Results: The results show that QKLI significantly increased levels of β-Hex, His, C3a, complement component 5a (C5a), and terminal complement complex C5b-9 (SC5b-9) in guinea pigs, while levels of interleukin 4 (IL-4), interleukin 13 (IL-13), and interleukin 6 (IL-6) were unaffected. The C3a receptor inhibitor SB290157 significantly reduced levels of β-Hex and His. In LAD2 cells, QKLI increased the release rates of β-Hex and His in a time-dependent manner and decreased the phosphorylation of Extracellular Signal-regulated Kinase 1/2 (ERK1/2) proteins downstream of the MRGPRX2 pathway. The effective components of QKL, baicalin (BA) and geniposide (GE), individually enhance the allergic responses of LAD2 cells to some extent. However, the use of QKL is significantly superior to the individual use of its components. Conclusions: We found that QKLI induced pseudoanaphylaxis via an IgE-independent response in guinea pigs and through the MRGPRX2 pathway in human LAD2 cells. Among these, the main ingredients causing pseudoallergic reactions in QKLI were BA and GE. Our research contributes to a better understanding of the mechanisms underlying drug hypersensitivity reactions (DHRs).
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Nano Energy
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2025
·
IF 17.1
Peng Bai,Jiafa Chen,Yicheng Zhao,Yongdan Li
CO 2 formylation of amines provides a promising route to convert CO 2 into value-added chemicals. That process is usually performed through a thermo-catalytic approach with additional reducing agents, which increases the energy consumption and the complexity of the system. Herein, we report photocatalytic CO 2 formylation of benzylamine over Pt 1 In-ZnO x single-atom-alloy catalyst at room temperature in N , N -dimethylformamide (DMF) solvent. The anchoring of Pt single atoms onto In nanoparticles through Pt-In bonds accompanied with electron transfer from In to Pt improves the absorption capacity for visible light and the separation efficiency of photogenerated charge carriers. Furthermore, the adsorption and activation of CO 2 and benzylamine are promoted on the surface of Pt 1 In single-atom-alloy. After 6 h reaction under visible-light, the yield of N -benzylformamide reaches 48.6 mmol g −1 with a 95.3 % selectivity. A possible reaction mechanism is proposed based on a series of in situ characterizations and theoretical calculations. A decomposition-regeneration cycle of DMF is involved in the photocatalytic process, which extends the reaction region and thus facilitates the formylation of benzylamine. The photocatalytic system exhibits good cycling stability and universality. This work provides new insights for the rational design of single-atom-alloy catalyst and an efficient approach for the sustainable utilization of CO 2 .
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ANALYTICAL CHEMISTRY
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2025
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IF 6.7
Jingyuan Guo,Guo Wang,Yunfan She,Kai Li,Yujia Liu,Zhiyi Sun,Zhengbo Chen
Single-atom nanozymes have made important progress in the field of sensors, but their catalytic performance as natural enzyme substitutes is far from satisfactory. We describe here a FeFe dual single-atom nanozyme (Fe2N6/CN) with a Fe loading of 0.89 wt %, and it shows a synergistic effect and a peroxidase (POD)-like activity. Especially, the Fe2N6/CN nanozyme shows an excellent specific activity (315.4 U μmol–1). The values of catalytic rate constant (kcat) and catalytic efficiency (kcat/Km) for the Fe2N6/CN with 3,3′,5,5′-tetramethylbenzidine (TMB) are 23.8 s–1 and 8.24 × 104 M–1 s–1, respectively, and with H2O2, they are 30.8 s–1 and 0.919 × 103 M–1 s–1, respectively. Density functional theory calculations reveal that Fe2N6/CN possesses excellent POD-like activity. Based on the POD-like activity of Fe2N6/CN, we design a Fe2N6/CN nanozyme chemical tongue for the colorimetric recognition of aromatic amines using three wavelengths as array’s channels. The data interpretation using linear discriminant analysis, clustering heat map, etc., shows excellent clustering separation and classification of aromatic amines. Furthermore, this chemical tongue can simultaneously recognize mixtures of different molar ratios, quantitatively determine different concentrations of individual aromatic amines, and even identify unknown samples. This preparation strategy not only provides a promising pathway for the utilization of nanozymes but also highlights the potential of dual single atoms as an attractive platform for design of sensor arrays.
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