CHINESE JOURNAL OF POLYMER SCIENCE
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2026
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IF 4.6
Liu Guan-Jun,Yan Mei-Ling,Tian Zhen,Wang Lu,Yang Fan,Wang Rong-Guo
Hot pressing is widely used to tailor the structures and properties of polymer composites. However, how it drives structural evolution and thereby affects barrier, mechanical, and thermal properties remains insufficiently understood. In this work, graphene oxide-grafted carbon nanotube/polyamide 6 (GO- g -CNT/PA6) composites were subjected to hot pressing at different radial expansion ratios ( ε =0, 2, and 4) to investigate the flow-induced structural evolution and the resulting property changes. Scanning electron microscopy and transmission electron microscopy observations revealed that hot pressing promoted the rearrangement and preferential alignment of the hybrid nanofillers, while two-dimensional wide-angle X-ray diffraction confirmed the enhanced crystalline orientation after hot pressing. Differential scanning calorimetry showed increased crystallinity in both the neat PA6 and GO- g -CNT/PA6 composites. Representative positron annihilation lifetime spectroscopy analysis further indicated a reduction in the fractional free volume, whereas the characteristic size of individual free-volume holes remained nearly unchanged. The results indicate that the optimal hot-pressing condition is property-dependent. A moderate deformation at ε =2 is more favorable for improving the hydrogen barrier and tensile properties, whereas a stronger deformation at ε =4 is more effective in promoting in-plane heat transport. These findings establish a correlation between the processing, structural evolution, and multifunctional properties of GO- g -CNT/PA6 composites, providing guidance for the design of PA6-based liner materials for Type IV hydrogen storage vessels.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Mojing Chen,Xiaoqiang Li,Yujiao Yan,Yanting Yang,Qunjie Xu,Haimei Liu,Yongyao Xia
Prussian blue analogues (PBAs) have been considered as promising cathodes for aqueous zinc-ion batteries because of their open framework for accommodating large ions, tunable valence state, and facile synthesis. Among PBAs, potassium manganese hexacyanoferrate (KMHCF) is favored due to its high working voltage, high specific capacity, and low cost. However, it suffers from severe capacity decay and poor rate capability, which are mainly a result of poor intrinsic conductivity, irreversible phase transition, transition metal dissolution, and structural collapse during charge/discharge cycling. These issues extremely limit its practical application. In order to solve these problems, conductive polypyrrole (PPy) was used to coat KMHCF microcubes to form KMHCF@PPy composites to achieve superior rate capability and prolonged cycle life. With the PPy coating, the KMHCF@PPy composite delivers a discharge capacity of 107.6 mA h g–1 after 100 cycles at 100 mA g–1, and even at 500 mA g–1 after 500 cycles, 64.2 mA h g–1 still remained. The excellent electrochemical performance can be attributed to the effects from PPy. On the one hand, PPy supplies an effective electronic transmission network for KMHCF to enhance the electronic conductivity. On the other hand, it plays the role of a protective layer to effectively inhibit the dissolution of Mn and the phase transition during the cycling.
研究领域:
材料科学
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电化学
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能源存储
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高影响因子
FUEL
·
2026
·
IF 7.5
Muhammad Kashif Majeed,Rashid Iqbal,M.Umar Majeed,Muhammad Akram,M.Zeeshan Ashfaq,Adil Saleem
Heterogeneous catalysis is highly desirable for the self-condensation of cyclohexanone, an important step in producing intermediates for fine chemicals and polymers. Conventional methods often rely on toxic reagents and long reaction times, limiting their industrial viability. In this study, Zr- and Hf-based metal–organic frameworks (UiO-66 and NUS-6) were developed as efficient, environmentally friendly catalysts for the self-condensation of cyclohexanone. Their high surface area and hierarchical porosity, combined with bifunctional Brønsted and Lewis acid sites introduced through partial linker substitution, enable excellent catalytic performance. UiO-66(Zr) achieved 81 % conversion in 6 h and 98 % in 48 h, while NUS-6(Zr) reached 85 % and 86 % under the same conditions, with high selectivity toward the desired dimer products. The catalysts also showed strong thermal stability and reusability, maintaining activity at elevated temperatures. This work demonstrates a sustainable catalytic pathway for cyclohexanone dimerization, avoiding corrosive chemicals while offering both efficiency and selectivity.
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JOURNAL OF MEDICINAL FOOD
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2024
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IF 1.7
Nannan Zhi,Xiangwei Chang,Xinrui Wang,Xiaobo Zhang,Jutao Wang,Liangping Zha,Shuangying Gui
Obesity is a threat to public health and effective new medications are required. Platycodonis Radix (PR) is a traditional medicinal/dietary plant with activities against obesity. Using mice given a diet rich in fat, the antiobesity components of PR were identified and their molecular mechanisms were clarified further in this investigation. Initially, the impacts of PR fractions on liver histology and biochemical markers were assessed. Subsequently, the degrees of lipogenic and lipolytic gene and protein expressions were determined. Oral administration of PR polysaccharides (PG) (0.80 g/kg body weight) improved liver function (alanine aminotransferase and aspartate aminotransferase) and its antioxidant activities (total superoxide dismutase, glutathione peroxidase, and malondialdehyde), as well as alleviated blood lipid (total cholesterol, total triglyceride, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol) values, inflammatory systemic (TNF-α and IL-1β), and histological abnormalities within the liver. Furthermore, PG administration downregulated the expression for lipogenic genes (ACC and FAS) and upregulated the expression for the lipolytic gene (PPARα, LPL, CPT1, and HSL). Importantly, PG raised AMPK phosphorylation and decreased SREBP-1c protein synthesis. Thus, it is possible that PG stimulates the AMPK-LPL/HSL path (lipolytic route) plus the AMPK-ACC/PPARα-CPT1 path (associated to β-oxidation of fatty acids), while inhibiting the AMPK/(SREBP-1c)-ACC/FAS path (lipogenic route). In summary, PG has the ability to regulate lipid metabolism, and it may be useful to pharmacologically activate AMPK with PG to prevent and cure obesity.
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高影响因子
ACS Applied Energy Materials
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2024
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IF 5.4
Gang Ni,Mengmeng Sun,Ning Wang,Zhiqiu Pan,Fuhu Cao,Peng Cui,Chenggang Zhou
As promising candidates for large-scale energy storage applications, aqueous zinc ion batteries (AZIBs) face challenges due to the electrochemical instability of cathode materials and Zn anodes. Introducing additives into the electrolyte is an effective approach to improving the compatibility of electrodes. In this work, trace amounts of poly(acrylic acid) (PAA) are utilized as electrolyte additives in 1.0 M ZnSO4 to enhance the cycle performance of the Zn3[Fe(CN)6]2/Zn battery. PAA demonstrates strong interfacial engineering ability on both the cathode and anode. PAA directly reacts with the Zn anode, leading to the formation of PAA–Zn films growing on the anode surface. The interfacial film inhibits the parasitic hydrogen evolution reactions, reducing the generation of byproducts. Regulating the anode’s interfacial structure promotes the uniform deposition of Zn. The electrolyte with 0.8 wt % PAA additives enables a long cycle life exceeding 300 h at 5 mA·cm–2 and 2.5 mAh·cm–2 in Zn/Zn symmetric cells, along with a high Coulombic efficiency of 98.07% in Cu/Zn asymmetric cells. Meanwhile, PAA preferentially adsorbs on the surface of the Zn3[Fe(CN)6]2 cathode, inhibiting the dissolution of ferricyanide anions in aqueous solution and reducing the self-discharge behavior. Thanks to the interfacial regulation of PAA on both the cathode and anode, the cycle performance of the Zn3[Fe(CN)6]2/Zn full cell is significantly enhanced to nearly six times that without PAA additives. This work lays the groundwork for the development of electrolyte additives that can improve the electrochemical performance of both the cathode and anode of AZIBs.
研究领域:
电化学
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能源存储
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材料科学
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JOURNAL OF MATERIALS RESEARCH
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2023
·Vol. 38
·期 11
·2943-2957
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IF 2.7
Sun Xiaoqin,Wang Tianyu,Yun Sining
Aurivillius phases with narrow band gaps have attracted extensive interest in the field of photocatalysis, however, they exhibit poor activity due to the low utilization of photogenerated carriers. Herein, a series of S-scheme C3N4@Bi m+1 Fe m-3 Ti 3 O 3m+3 (m = 4, 5, 6) heterojunctions with two-dimensional structures were synthesized by simple two-step method. Compared with single materials, the composites exhibit excellent photocatalytic tetracycline degradation under visible light, and 91.8% of tetracycline can be degraded accompanied with 81.2% of TOC removal within 120 min over C 3 N 4 @Bi 5 FeTi 3 O 15 . The enhanced photocatalytic performance is due to strong interface interaction, high conductivity, and efficient charge separation ability. The mechanism analysis indicates that the C 3 N 4 @Bi 5 FeTi 3 O 15 heterojunction follows an S-scheme heterojunction mechanism with a strong interfacial internal electric field directed from C 3 N 4 to Bi 5 FeTi 3 O 15 , thus, the photogenerated electrons in Bi 5 FeTi 3 O 15 move toward C 3 N 4 , which retains high oxidation ability of Bi 5 FeTi 3 O 15 and high reduction ability of C 3 N 4 to efficiently produce the reactive species, such as O 2 − · and ·OH.
Graphical Abstract
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SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Xin Hua,Xiao Feng,Geyu Liang,Jie Chao,Dayong Wang
2-((4-Methylpentan-2-yl)amino)-5-(phenylamino)cyclohexa-2,5-diene-1,4-dione (6-PPDQ) is the ozonation product of 6-PPD, a commonly used tire preservative. Although the 6-PPDQ has been frequently detected in different environmental ecosystems, its long-term effects on organisms remain still largely unknown. We here used Caenorhabditis elegans as an experimental animal to investigate the toxic effect of prolonged exposure to 6-PPDQ (0.1–100 μg/L). After the exposure, we found that 100 μg/L 6-PPDQ caused the lethality . We further selected concentrations of 0.1–10 μg/L to examine the possible intestinal toxicity induced by 6-PPDQ. Although 0.1–10 μg/L 6-PPDQ could not influence intestinal morphology, the intestinal permeability was significantly enhanced by 1–10 μg/L 6-PPDQ as indicated by erioglaucine disodium staining. In addition, the expression of intestinal fatty acid transporter ACS-22 governing functional state of intestinal barrier was decreased by exposure to 1–10 μg/L 6-PPDQ. Meanwhile, intestinal reactive oxygen species (ROS) production was induced by 0.1–10 μg/L 6-PPDQ and lipofuscin accumulation reflected by intestinal autofluorescence was activated by 1–10 μg/L 6-PPDQ. Accompanied with activation of intestinal oxidative stress , expressions of some anti-oxidation related genes ( ctl-2 , sod-2 , sod-3 , and sod-4 ) were significantly increased by 0.1–10 μg/L 6-PPDQ. Moreover, intestinal RNAi of acs-22 strengthened the susceptibility of nematodes to intestinal toxicity of 6-PPDQ. Therefore, considering that the environmentally relevant concentrations of 6-PPDQ were ≤10 μg/L, our data suggested that long-term exposure to 6-PPDQ at environmentally relevant concentrations potentially results in intestinal toxicity by disrupting functional state of intestinal barrier in organisms.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 34
·e54327
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IF 3
Wei Zhang,Hui Li,Weihong Cao,Zhenghong Guo,Zhengping Fang,Juan Li,Peng Chen
In this work, an organophosphorus flame retardant (BHD) was synthesized using 4-formylphenylboronic acid and 1,6-hexanediamine; a charring-coupling agent containing epoxy (DE) was synthesized using daidzein and epichlorohydrin. The BHD and DE were reacted and coated on the surface of aluminum diethylphosphinate (ADP) and the product is identified as BD-ADP. PA6 with 12 wt% BD-ADP achieves a UL-94 V-0 rating and a limiting oxygen index (LOI) value of 30.0 vol%. Substitute 1.0 wt% DE for BD-ADP, PA6-1.0E not only achieves a UL-94 V-0 rating, but also goes out before dripping. The time to ignition of PA6-1.0E is 19 s longer than that of PA6. The flame-retardant mode is the combination of the gas-phase effect of ADP and the condensed-phase effect of DE. In addition, the tensile strength and impact strength of PA6-1.0E are 103.9 MPa and 6.6 kJ/m 2 which are 35.6% and 43.5% more than that of PA6-12A. Both BD coating and DE contribute to a strong interfacial adhesion between ADP and PA6 which improves the mechanical properties. The DE plays a key role in the flame retardancy and mechanical properties of PA6 blends.
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FEBS Open Bio
·
2023
·
IF 2.6
Yu Zhu,Longmei Wang,Rui Liu,Xiurong Ding,Song Yin,Yuankun Chen,Chuanlong Zhu,Zheng Wang,Wenting Li
Sepsis-induced acute kidney injury (SI-AKI) causes renal dysfunction and has a high mortality rate. Protein arginine methyltransferase-1 (PRMT1) is a key regulator of renal insufficiency. In this study, we explored the potential involvement of PRMT1 in SI-AKI. A murine model of SI-AKI was induced by cecal ligation and perforation (CLP). The expression and localization of PRMT1 and molecules involved in the TGF-β1/Smad3 and IL-6/STAT3 signaling pathways were detected in mouse kidney tissues by western blot, immunofluorescence, and immunohistochemistry. The association of PRMT1 with downstream molecules of the TGF-β1/Smad3 and IL-6/STAT3 signaling pathways were further verified in vitro in mouse renal tubular epithelial cells (mRTECs). CLP caused epithelial-mesenchymal transition (EMT), apoptosis, and inflammation in renal tissues, and this was alleviated by inhibition of PRMT1. Inhibition of PRMT1 in SI-AKI mice decreased the expression of TGF-β1 and phosphorylation of Smad3 in the renal cortex, and downregulated the expression of sIL-6R and phosphorylation of STAT3 in the medulla. Knockdown of PRMT1 in mRTECs restricted the expression of Cox-2, E-cad, Pro-caspase3 and p-Smad3 (involved in the TGF-β1-mediated signaling pathway), and blocked IL-6/sIL-6R, inducing the expression of Cox-2 and p-STAT3. In conclusion, our findings suggest inhibition of PRMT1 mitigates SI-AKI by inactivating the TGF-β1/Smad3 pathway in the cortex and IL-6/STAT3 pathway in the medulla. Our findings may aid in the identification of potential therapeutic target molecules for SI-AKI.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Bo Li,Yanli Sun,Jinbo Yao,Yanqin Shen,Hailiang Wu,Jiaying Li,Meihui Yang
The complex chemical structure of polypeptide and the imperfection of processing technology cause the mechanical properties of regenerated keratin to be hard and brittle. This defect seriously affects the application prospects of keratin materials. To solve the above problems, α-lipoic acid modified keratin (KER) was blended with Polyamide 6 (PA6) and prepared into composite fibers via the wet-spinning method in this work. The spinnability and spinning conditions of the KER/PA6 blend solution were analyzed by rheological theory. The results illustrated that keratin solution will easily form a gel state under certain temperatures and concentrations, which was not conducive to the preparation of regenerated fiber. When the temperature was 45 °C and the mass fraction was 10 %, the viscosity and rheology of the solution were appropriate. The rheological properties of the blend solution showed that too much keratin would make the solution easy to gel, which was not conducive to the preparation of regenerated fibers and may affect the fiber properties. On this basis, the prepared composite fibers were characterized to explore the macromolecular aggregation state of keratin and PA6 in fibers. FT-IR and XRD results proved that there was no chemical reaction between keratin and PA6 in the composite fibers, which belonged to physical blending. At the same time, the two polymers had good compatibility and can be blended at the molecular level. SEM, DSC , and tensile strength test results indicated that when the proportion of keratin was too high, the structure and properties of the composite fibers will have obvious defects, which was consistent with the rheological analysis. Therefore, the blend ratio of keratin/PA6 was determined to be 3:7. Under this condition, the fibers exhibited a homogeneous structure and good thermal properties, especially its mechanical properties were close to wool fibers. The KER/PA6 composite fibers show important research value and can also provide technical reference for the development of regenerated biomass materials.
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高影响因子
Journal of Advanced Research
·
2022
·
IF 12.822
Xiaodong Ge,Xiaoyu He,Junwei Liu,Feng Zeng,Ligen Chen,Wei Xu,Rong Shao,Ying Huang,Mohamed A. Farag,Esra Capanoglu,Hesham R. El-Seedi,Chao Zhao,Bin Liu
Introduction Luteolin is a plant-derived flavonoid that exhibits a broad range of pharmacological activities. Studies on luteolin have mainly focused on its use for hyperlipidaemia prevention, whereas the capacity of the flavonoid to hinder hyperglycaemia development remains underexplored. Objectives To probe the anti-hyperglycemic mechanism of 6,8-guanidyl luteolin quinone-chromium coordination (GLQ.Cr), and to assess its regulatory effect on intestinal microbiota in type 2 diabetes mellitus (T2DM) mice. Methods High-sucrose/high-fat diet-induced and intraperitoneal injection of streptozotocin was used to develop a T2DM model. Glycometabolism related indicators, histopathology, and gut microbiota composition in caecum samples were evaluated, and RNA sequencing (RNA-seq) of liver samples was conducted. Faecal microbiota transplantation (FMT) was further used to verify the anti-hyperglycemic activity of intestinal microbiota. Results The administration of GLQ.Cr alleviated hyperglycaemia symptoms by improving liver and pancreatic functions and modulating gut microbe communities ( Lactobacillus, Alistipes , Parabacteroides , Lachnoclostridium , and Desulfovibrio ). RNA-seq analysis showed that GLQ.Cr mainly affected the peroxisome proliferative activated receptor (PPAR) signalling pathway in order to regulate abnormal glucose metabolism. FMT significantly modulated the abundance of Lactobacillus , Alloprevotella , Alistipes , Bacteroides, Ruminiclostridium, Brevundimonas and Pseudomonas in the caecum to balance blood glucose levels and counteract T2DM mice inflammation. Conclusion GLQ.Cr improved the abnormal glucose metabolism in T2DM mice by regulating the PPAR signalling pathway and modulating intestinal microbial composition. FMT can improve the intestinal microecology of the recipient and in turn ameliorate the symptoms of T2DM-induced hyperglycaemia.
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高影响因子
CIENCIA RURAL
·
2022
·
IF 0.901
Liu Zhenyi,Wang Jing,Yin Meijuan,Liu Mengsheng,Gao Weijuan
The Eucalyptus plant releases allelopathic chemicals into the environment mostly through the essential oils volatilized from the leaves. This study discussed the composition of the leaf oils of few seven-year-old varieties like Eucalyptus pellita (E. pel), Eucalyptus camaldulensis (E. cama), Eucalyptus grandis (E. gra), Eucalyptus dunni (E. dun), Eucalyptus saligna (E. sal), and E. grandis × E. urophylla (E. gra×E. uro) and three-year-old E. grandis × E. urophylla (E. gra × E. uro (three)). It determined the allelopathic mechanism and the types of chemical components playing the leading role. Essential oil was obtained by hydrodistillation and analyzed by the Gas Chromatography-Mass Spectrometry (GC-MS) method. In order to determine the effect of allelopathy, seed germination experiments were carried out at different concentrations (10-100 mL/L) of the E. Gra × E. uro leaf oil (EO) and the major components. The wheat seeds germinated by adding 1,8-cineole were used to determine the activity of α-amylase. Moreover, the mRNA expression of α-amylase in seeds was studied. The major chemical class in the essential oil was oxygenated monoterpene; 1,8-cineole (20.2-67.5%) displayed the highest content. Other substances that were high in content and ubiquitous included α-pinene (0.3-21.8%), α-terpineol (0.44-19.24%), and borneol (0.81-3.05%). The four chemical constituents and EO influenced the germination and growth of the three plants. Among them, 1,8-cineole exhibited the strongest inhibitory effect. The α-amylase activity of the 1,8-cineole-treated wheat seeds had decreased significantly. Molecular evidence suggested that 1,8-cineole decreased the α-amylase gene (AMY) expression.
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危险品化学品经营许可证（带存储）