PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Baolong Xue,Xuejing Liu,Yuying Liu,Qibin Xu,Junfeng Ke,Mengjin Jiang
Flexographic printing plates, which are typically composed of a metal substrate, an adhesive layer, and a poly(vinyl alcohol) (PVA) photosensitive layer, are essential for achieving high-resolution patterns in flexographic printing technology. The adhesive layer, serving as the bonding interface between the metal and PVA layers, must exhibit strong adhesion to both metal and polymer surfaces, along with high toughness, mechanical strength, solvent resistance, and durable adhesion to meet the mechanical and chemical requirements of flexographic printing technology. Herein, inspired by the structure of mussel foot silk protein, this study integrates carbon–carbon double bonds, catechol, alcohol hydroxyl, and amino ester groups into a single polymer chain via a two-step reaction. Benefits to its rigid-flexible cross-linked network, the obtained adhesive exhibits good strength, modulus, and toughness. Specifically, its tensile strength, tensile modulus, elongation at break, and impact strength are 1.70 MPa, 0.85 GPa, 19.3 %, and 2.97 kJ/m 2 , respectively. Furthermore, the adhesive achieves a 180° peel strength of 2.26 N/mm with tinplate and 3.89 N/mm with flexographic printing plates. Notably, after 7 days of immersion in water, ethanol, and dimethylformamide, the 180° peel strength retention rate was as high as 96.9 %, 96.2 %, and 93.9 %, respectively. After being stored at room temperature for 28 days, the 180° peel strength retention rate reaches up to 98.3 %, highlighting its long-lasting durability. This mussel-inspired group integration strategy provides a straightforward and efficient approach for developing high-performance multi-functional adhesives, with significant potential for advancing flexographic printing.
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MATERIALS LETTERS
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2025
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IF 2.7
Zhicheng Wu,Xiang Li,Zhiyong Lv,Bo Liu,Siyang Chen,Qiaogen Zhang
Real-time and accurate detection of moisture content in insulating oil is crucial for the safe operation of oil-filled electrical equipment. This study presents a method for preparing hydrophobic porous PI films for moisture sensing using supercritical CO 2 foaming (SCF) technology. The resulting porous PI films have a uniform and dense nanometer-scale microporous structure, with a water contact angle of 111.7°, indicating strong hydrophobicity and enabling the mitigation of hysteresis-induced measurement inaccuracies. Compared to sensors made using traditional methods such as non-solvent induced phase separation (NIPS), the moisture sensors fabricated using this method exhibit a response time of 10 s, with humidity hysteresis reduced from 9.1 %RH to 2.3 %RH, achieving both fast response and low humidity hysteresis. This method also holds broad application prospects in areas such as permeation membranes and energy.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Han-Chen Zeng,Peng-Fei Qiu,Zhuo Huang,Xiu-Niang Tan,Zai-Yin Huang,Yan Zhou
The poor electrical conductivity and pronounced structural instability of NiCo Layered Double Hydroxide are of major challenge in energy storage. Herein, three distinct morphological types of S doped nickel cobalt layered double hydroxides, S-LDH-x/NF (x = Ⅰ, Ⅱ and Ⅲ) electrodes are successfully prepared from thiol-functionalized conductive metal organic frameworks NiCo-MOF-x/NF (x = Ⅰ, Ⅱ, Ⅲ) precursors through the synergistic method of in situ interfacial synthesis via coordinated growth and etching. Among them, S-LDH-Ⅱ/NF with nanoflower morphology shows excellent electrochemical performances with high conductivity and remarkable cycling stability, and the surface capacitance is 2617 mF/cm 2 (1 mA/cm 2 ). What's more, the S-LDH-Ⅱ//AC ASC affords a density of energy of 99 Wh/kg (0.182 mWh/cm 2 ) at 415 W/kg (0.76 mW/cm 2 ). In addition, after 10,000 cycling cycles, the S-LDH-Ⅱ//AC ASC still maintains 74 % capacitance retention, indicating its exceptional cycling performance. This paper offers a new approach for designing novel energy storage materials based on thiol-functionalized bimetallic conductive metal organic framework templates through synergistic synthesis method and morphology engineering strategy.
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Nanoscale
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2025
·Vol. 17
·期 35
·20465-20475
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IF 5.1
Weiyi Li,Min Zhang,Shen Cai,Yan Xin,Huajun Tian
Alluaudite-type Na2+2xFe2−x(SO4)3 has been a promising cathode material for sodium-ion batteries (SIBs) due to its high operating voltage and stable structure. However, its actual electrochemical performance suffers from intrinsic sluggish kinetics and poor electronic conductivity. In this work, for the first time, we propose a Na2.48(Fe0.89Mg0.03Sn0.04)1.76(SO4)3 cathode material prepared via a Mg/Sn co-doping strategy. Inactive Mg2+ stabilizes the structure, while Sn4+ inhibits the decomposition of electrolytes under high voltage. The Mg/Sn co-doping strategy enhances the kinetics of sodium ion diffusion reactions, leading to improved electrochemical properties, especially at low temperatures. The optimal NFMS/C-Sn0.03 cathode exhibits a long-term capacity retention of 91.6% after 1500 cycles at 5C and outstanding reversible capacities of 74.3 and 58.3 mAh g−1 at 10C and even at 50C, respectively. Furthermore, the NFMS/C-Sn0.03 cathode demonstrates a high capacity retention of 95.5% at −5 °C and 88.4% at −15 °C, with a remarkable capacity retention of 93.9% after 1000 cycles at room temperature and 85.5% after 700 cycles at −15 °C, respectively. Electron paramagnetic resonance (EPR) and atomic force microscopy (AFM) techniques confirmed that the presence of unpaired electrons and enhanced electronic conductivity could be attributed to the Mg/Sn co-doping. This work provides a feasible approach for designing low-cost, durable, low-temperature, and high-performance cathode materials for SIBs.
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CHEMISTRY-A EUROPEAN JOURNAL
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2025
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IF 3.7
Yeheng Zhang,Tianwen Zheng,Hong Dai,Yinhua Jiang,Yuqiao Wang
Developing cost-effective oxygen evolution reaction (OER) catalysts for industrial current densities remains challenging, hindered by adsorbate evolution mechanism (AEM) scaling limitations and reconstruction instability. Here, we report a heterointerface-engineered Ni 3 S 2 /NiFeOOH catalyst formed via in-situ electrochemical reconstruction of Ni 3 S 2 /NiFe-LDH. Interfacial charge redistribution stabilizes high-valent Ni 3+ /Fe 3+ species and generates coordinatively unsaturated lattice oxygen sites, thereby activating the lattice oxygen mechanism (LOM). Combined operando spectroscopy, pH-dependent kinetics, and isotope labeling confirm LOM dominance. Further theoretical analyses reveal that the heterointerface downshifts the metal d -band center and upshifts the O 2p -band center, optimized intermediate adsorption free energy. Benefiting from the compatible multi-mechanism, the reconstructed catalyst demonstrates outstanding OER performance, only requires overpotentials of 196/305 mV to drive current densities of 10/1000 mA cm −2 in alkaline media, with robust stability for over 500 h. This work clarifies how interfacial electronic modulation connects pre-catalyst reconstruction to LOM activation, providing a scalable design strategy for high-current-density OER electrocatalysts. Graphical Upon electrochemical activation, Ni 3 S 2 /NiFe-LDH catalysts undergo transformation to Ni 3 S 2 /NiFeOOH. This structural reconstruction not only exposes additional catalytic active sites but also activates lattice oxygen species, thereby triggering the lattice oxygen reaction pathway. By circumventing the thermodynamic constraints inherent to the adsorbate mechanism, the reconstructed catalyst achieves a reduced overpotential, ultimately enhancing its oxygen evolution reaction (OER) catalytic performance.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Weihua Zou,Xinze Liu,Wenhui Wang,Naike Zou,Delin Sun
Thermochromic phase change material (TC) is a temperature-responsive heat storage material. However, few TCs are renewable. In the present study, a renewable TC (RTC) composed of alizarin , myristyl myristate , and 1-hexadecanol was synthesized, demonstrating a color shift between orange and orange-red during phase transitions. To maintain the shape stability, the RTC was encapsulated within a wood-based cellulose/sodium methylsilicate framework, termed thermochromic wood composite-smart material (TWC-SM). This framework altered the chemical structure of alizarin , resulting in a color shift between greyish-purple ( L : 26 ± 1, a : 4 ± 1, b : −6 ± 1) and deep-purple ( L : 14 ± 2, a : 1 ± 1, b : −3 ± 1) for TWC-SM during phase changes, indicating a distinct thermochromic mechanism compared to RTC. Specifically, TWC-SM appears greyish-purple below 52 °C, where the benzene ring of alizarin features two fixed O groups and an additional -OH group. At temperatures above 70 °C, it turns deep-purple as the -OH group loses a hydrogen ion. TWC-SM exerts a pronounced thermochromic effect, conferring temperature-responsive functionality. Moreover, the solid-liquid phase-changing enthalpy of RTC is 186.78 J/g, and the wood-based cellulose/sodium methylsilicate framework ensures the shape stability of RTC within TWC-SM. Consequently, the average temperature of TWC-SM is at least 5.56 °C higher than that of untreated wood over 60 min following identical thermal treatment. This finding shows the potential of the framework for practical applications in temperature-responsive heat storage materials. This study reveals the structure-activity relationship between RTC and the framework within TWC-SM, which is key to the development of practical applications of RTCs.
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Small
·
2025
·
IF 12.1
Yan Xin,Yunnian Ge,Huanhuan Xie,Shen Cai,Chen Zhao,Huai Zhang,Huajun Tian
Aqueous zinc-ion batteries (AZIBs) have emerged as a promising energy storage solution owing to their intrinsic safety, low cost, environmental friendliness, and high theoretical specific capacity. However, their practical application is hindered by uncontrollable dendrite growth and side reactions at the zinc metal anode. To address these challenges, a simple and cost-effective electrodeposition strategy is proposed to construct a quaternary Zn-Cu-Sn-Bi alloy artificial interface layer on zinc foil (ZCSB@Zn) as the anode of AZIBs. Density functional theory (DFT) calculations and in situ optical dendrite observation confirm that this dense alloy interface layer reduces the migration barrier and weakens hydrogen adsorption, facilitating uniform zinc deposition while effectively suppressing side reactions and dendrite formation. The symmetric ZCSB@Zn cell exhibits extraordinary cycle stability exceeding 8000 h. Furthermore, the assembled ZCSB@Zn//CSB-MnO 2 full cell demonstrates a high specific capacity of 199 mAh g −1 at 1 A g −1 , maintaining stability even under high loading of 10 mg cm −2 and high temperature conditions (50 °C). This study presents a scalable and cost-effective strategy for constructing quaternary artificial interface layers in zinc metal anodes, highlighting their potential for practical AZIB applications.
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APPLIED THERMAL ENGINEERING
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2025
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IF 6.9
Zeyang Kang,Shuo Qiu,Qingyu Lv,Jun Yang,Li Zhan,Yong Li,Xiangyang Liu,Maogang He
Managing thermal energy effectively in buildings is vital for sustainability, particularly in extremely cold climates. Herein, we present an innovative approach to building insulation by leveraging cellulose nanofiber (CNF)/black phosphorus (BP) aerogels with uniquely aligned xylem-like porous structures. This study posits that the synergistic interplay between CNF and BP significantly enhances thermal insulation, photothermal conversion, and flame-retardant capabilities, offering a cutting-edge solution for advanced thermal management. Using a strategic combination of polyethyleneimine and 3-glycidoxypropyltrimethoxysilane as co-additives, lightweight CNF sponge-like aerogels were fabricated via freeze-drying and post-crosslinking techniques. These aerogels achieved exceptional thermal insulation with a remarkably low thermal conductivity of 0.067 W/(m·K). Additionally, they demonstrated superior photothermal performance, reaching 84 °C within just 300 s under one-sun illumination, effectively maintaining a stable microclimate even at −5 °C by combining photothermal conversion and insulation effects. The flame-retardant properties of the CNF/BP aerogels were equally impressive, with total heat release reduced by 71 % compared to conventional crosslinked CNF aerogels. This is attributed to the robust porous char formed through phosphoric acid crosslinking with internal carbon chains. These multifunctional CNF/BP aerogels not only redefine the boundaries of thermal management but also establish a promising pathway for next-generation thermal protection materials.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Huanhuan Wang,Qi Qu,Qingbin Tian,Jin Wang,Jiming Gao,Yufeng Liu,Yan He,Jun Yang
The dispersion of carbon nanotubes (CNTs) remains a critical challenge for their application in nanocomposites and advanced functional materials. This study proposes a systematic surface modification strategy involving sequential acid oxidation, reduction, and silane coupling agent (SCA) grafting to enhance CNT dispersibility. The effects of oxidation time, reduction time, and SCA concentration on CNT surface chemistry, structure, and dispersion were comprehensively evaluated using XPS, FTIR, Raman, and TGA. Results indicated that an optimal oxidation time of 8 h maximized the introduction of oxygen-containing functional groups while maintaining CNT structural stability, whereas a 5 h reduction time effectively converted carbonyl and carboxyl groups (−C O, –COOH) into hydroxyl (–CH 2 OH), enhancing reactivity for subsequent functionalization. A grafting concentration of 5 wt% SCA achieved effective surface coverage and dispersion. The resulting functionalized CNTs exhibited superior dispersion stability in polar solvents, confirmed by SEM, sedimentation, contact angle, and zeta potential analyses. Improved surface polarity, electrostatic repulsion, and steric hindrance were identified as key contributors. This work provides a comprehensive approach to CNT surface modification, offering valuable insights into tailoring CNT dispersibility for improved interfacial compatibility in polymer nanocomposites, coatings, and functional materials.
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