PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Haoyuan Fan,Jie Cheng,Ru Bai,Ning Li,Li Wang
Conventional self-healing anti-corrosion coatings face limitations in corrosion inhibitor release kinetics, triggering conditions, and inhibition efficiency, which compromise their protective effectiveness for magnesium alloys. In this study, we developed a novel dual-functional PEO/EP@PIN composite coating with salt-responsive self-healing properties. The coating system innovatively combines a plasma electrolytic oxidation (PEO) interlayer with an epoxy (EP) topcoat embedded with polyaniline (PANI) microcapsules containing 1-decyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (IN) ionic liquid corrosion inhibitor. The PANI microcapsules enable rapid Na + -triggered inhibitor release in high-salinity environments, while the PEO layer ensures robust interfacial adhesion to the Mg substrate. Electrochemical tests demonstrated that the coating achieves an ultralow corrosion current density of 6.26 × 10 −11 A·cm −2 , representing a 7-order-of-magnitude reduction compared to bare Mg alloy, while maintaining a high impedance modulus of 8.97 Ω·cm 2 after 30 days of immersion in 5.0 wt% NaCl solution. Scratch-healing experiments and XPS analysis revealed that the released IN inhibitor forms Mg-N/S chemical bonds with the substrate and generates hydrolyzed Mg(OH)₂ barrier phases, effectively blocking corrosive media penetration. This work elucidates the salt-responsive and self-healing mechanisms of the coating, providing new insights for developing smart anti-corrosion coatings for magnesium alloys.
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PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Wei Zhang,Lianfeng Wu,Shuxue Zhou
MXenes have attracted significant attention due to their unique properties, including antibacterial property and electrical conductivity. However, the antibacterial performance of MXenes-based coatings strongly depends on their superficial distribution. In this study, Ti 3 C 2 nanosheets were modified with dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium (QAS) and further incorporated into waterborne epoxy coatings. Influence of modifier ratio on the distribution of QAS-modified Ti 3 C 2 nanosheets (Q-Ti 3 C 2 ) in coatings as well as on the antibacterial/antistatic performance of coatings was investigated. Appropriate amount of QAS (i.e., 10 %) for modification was critical to achieve high antibacterial performance at low content of Ti 3 C 2 nanosheets. The Q-Ti 3 C 2 embedded coating could get 99.4 % inhibition against E. coil and 100 % against S. aureus at 0.5 wt% loading. In contrast, the coating with unmodified Ti 3 C 2 only exhibited antibacterial rate of 85.3 % and 87.4 % for E. coil and S. aureus , respectively. The prominent antibacterial performance of Q-Ti 3 C 2 based coatings mainly results from the enriched residence of Ti 3 C 2 nanosheets at the upper layer of coatings and partially from the intrinsic antibacterial property of QAS. Additionally, the superficial distribution of Ti 3 C 2 nanosheets endowed the coatings with low surface resistance of 1.8 × 10 9 Ω, thereby conferring antistatic properties, and hence, facilitating antibacterial durability, even if the coating contains as low as 1 wt% Q-Ti 3 C 2 nanosheets. The nanocomposite coatings also exhibited better adhesion and high pencil hardness.
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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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2025
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IF 5.8
Dahao Ji,Abdulaziz Alasiri,Yuefeng Zhang,Xiong Zheng
To overcome the critical limitations of conventional phase change composites (PCCs)—including low thermal anisotropy, phase change material (PCM) leakage, and inefficient photo-thermal conversion—we develop a hierarchically engineered PCC by integrating chitosan (CS) aerogel, unidirectionally aligned carbon fibers (CFs), and polyethylene glycol (PEG2000). The CS aerogel matrix suppresses PEG leakage via hydrogen-bonding networks while enabling directional CF alignment, achieving record axial thermal conductivity (6.61 W·m⁻¹·K⁻¹) and exceptional anisotropy (ratio: 11.9). Despite reduced PEG loading with CF content, the composites retain high latent heat (136.6 kJ·kg⁻¹ at 15 wt% CFs) and mechanical robustness. The aligned CF network synergistically enhances broadband solar absorption and directional heat transfer, enabling ultrahigh solar-thermal efficiency (98.5 % at 3.0 sun irradiation). Remarkably, the system exhibits excellent cyclic stability and outdoor operational reliability. This work establishes a scalable paradigm for sustainable thermal energy storage by concurrently resolving the trade-offs among PCM encapsulation, anisotropic thermal management, and photo-thermal conversion.
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FUEL
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2025
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IF 7.5
Wenji Liang,Junwei Shi,Zhenhua Qin,Jinguang Cai,Yun He,Jianfen Li
Exploring efficient and durable non-noble metal catalysts toward oxygen reduction/evolution reaction (ORR/OER) is of practical significance in advancing Zn-air batteries. Herein, we introduce a three-dimensional (3D) bifunctional electrocatalyst (Fe/Ni@NSC) consisting of N, S-dual doped mesoporous carbon nanosheets/carbon nanotubes embedded with abundant FeS/FeNi nanoparticles and Fe/Ni-N x sites by integrating rod-like ZIF-L@S-g-C 3 N 4 with Fe/Ni-phen complex and subsequent pyrolysis. The 3D structure not only offers a high surface area for active sites but also accelerates O 2 transport/charge transfer. Leveraging the synergistic effect of the 3D porous carbon network and multiple active sites, Fe/Ni@NSC exhibited outstanding activities in both ORR (half-wave potential, 0.868 V) and OER (overpotential, 317 mV at 10 mA cm −2 ), indicating a low potential gap of 0.679 V, outperforming the Pt/C + RuO 2 benchmarks (0.695 V). The Zn-air batteries based on Fe/Ni@NSC achieved a promising open circuit voltage (1.47 V), peak power density (172.59 mW cm −2 ), as well as long-term cycling stability (370 h). Furthermore, density functional theory (DFT) calculations also demonstrated that the interfacial electronic interaction between FeS and FeNi effectively boosted the bifunctional catalytic performance for ORR/OER. This study lays the foundation for designing low-cost and efficient 3D structure non-noble metal catalysts for more energy conversion and storage devices.
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FUEL
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2025
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IF 7.5
Yang Zheng,Wei Su,Hualong Zhou,Jiaqing Wang,Wenbo Zhang,Yi Xing
To address the problems of difficult degradation of Chlorinated volatile organic compounds (CVOCs) and easy deactivation of catalysts by chlorine poisoning, o-Dichlorobenzene ( o- DCB) was used as a model pollutant, and a shape size-tunable CeCoOx catalyst was designed by Prussian blue analogue (PBA) derivatization, and the nucleation rate of the precursor was controlled by regulating the amount of Polyvinyl pyrrolidone (PVP) added (0–15 g), so that the CC-PVP y catalysts with hexagonal bipyramidal to lamellar gradient structures were successfully prepared, and their structure-efficacy relationship and mechanism were systematically elucidated. The results showed that the appropriate amount of PVP could optimize the crystallinity and size uniformity of the precursor, and the resulting CC-PVP 1 catalyst showed a complete hexagonal bipyramidal structure with maximum specific surface area and pore volume, and the surface was enriched with highly active Co 3+ species and adsorbed oxygen. Mechanistic studies have shown that chlorine poisoning mainly occurs through Cl - occupying the oxygen vacancies, leading to a decrease in the crystallinity of the catalyst, a collapse of the pore structure, a weakening of the redox capacity and a decrease in the number of acid sites. CC-PVP 1 significantly delayed the deactivation by reducing the amount of Cl deposited on the catalyst surface due to its high structural integrity. This study deepens the understanding of the catalytic combustion mechanism of CVOCs and provides a feasible strategy for the development of efficient chlorine-resistant catalysts.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Yichong Song,Yuheng Zhang,Zengkun Li,Junlei Wang,Zhonglin Du,Yao Wang,Qiao Wang,Jun Li,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Cyanate Ester Resins (CERs) are widely recognized for their excellent thermal stability and chemical resistance. However, their brittleness and high curing temperature limit their applications in key areas. To overcome these critical problems, this study investigates the enhancement of europium (Eu 3+ )-induced polystyrene- co -polyacrylic acid nano-aggregates (EIPAs) on the mechanical properties of EIPAs-doped bisphenol F dicyanate resin (EIPAs/F-CER). This modified F-CER exhibits significant improvements in tensile strength and flexural strength at the optimized concentration of 0.8 wt% EIPAs, corresponding to increases of 102.93 % and 121.72 %. At the same time, the thermal stability of this hybrid EIPAs/F-CER increases from 403.89 °C to 412.67 °C. Moreover, the photoluminescence property of the doped F-CER is optimally generated at 0.8 wt% EIPAs content, demonstrating excellent red emission at 612 nm. Therefore, the distinguished innovations of this work are (1) simultaneous enhancement of both mechanical properties and thermal stability, and (2) accompanying excellent red luminescence for potential temperature sensing. These achieved important results indicate that EIPAs are more effective in the mechanical enhancement of F-CER and capable of generating excellent luminescence and thermally stable flexible hybrid materials.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
Peng Gong,Xiangyu Xu,Weiguo Chen,Fei Liu,Pan Guo
This study reports a novel strategy to fabricate phase change composites (PCCs) by integrating polydopamine (PDA)-modified ultrafine silicon carbide (SiC) with copper nanosheets (CuNSs) in paraffin wax (PW). The PDA coating (10–20 nm) on SiC forms a conjugated aromatic layer for enhanced solar-light absorption, while two-dimensional CuNSs construct a continuous thermal-conductive network.” The results show that the thermal conductivity of the optimized PCCs reaches 3.9 W m −1 K −1 (16.3-fold improvement over pure PW), and the solar-thermal conversion efficiency achieves 88.9 % due to the synergistic effect of PDA's light absorption and CuNSs' localized surface plasmon resonance. Additionally, the mass retention rate of PCCs at 80 °C is 99.5 %, demonstrating excellent shape stability. This work provides a multi-functional strategy for improving energy storage performance, holding potential for applications in solar-integrated building systems and thermal management.
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MINERALS ENGINEERING
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2025
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IF 5
Ying Zhang,Yuhua Wang,Ning Sun,Man Cui
Efficient flotation of spodumene at low temperatures remains a major challenge in lithium resource recovery. This study explores the flotation performance and interfacial behavior of combined collectors comprising sodium oleate (NaOL) with dodecyl amine (DDA) or dodecyl trimethylammonium chloride (1231) across temperatures from 5 °C to 35 °C. Flotation results show that collector performance generally declines at lower temperatures, particularly at low concentrations. However, the NaOL/1231 system maintained high spodumene recovery (>80 %) at 5 °C using only half the concentration required by the NaOL/DDA system, highlighting its superior low-temperature adaptability and economic advantage. Surface tension and critical micelle concentration (CMC) analyses indicate that NaOL/1231 has stronger surface activity and forms a more compact and stable interfacial adsorption layer under cold conditions. Molecular dynamics simulations further confirm that the 1231 cation enhances water molecule orientation, disrupts hydrogen bonding, reduces molecular diffusivity, and stabilizes interfacial structure at low temperatures. These findings elucidate how temperature affects flotation behavior and interfacial dynamics, emphasizing the excellent interfacial stability and cold-resistance of the NaOL/1231 system. This work offers both theoretical understanding and practical guidance for designing flotation reagents with enhanced performance in cold-region lithium mineral processing.
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高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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2025
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IF 5.8
Guanqiu Hao,Feifan Liu,Tong Shen,Yaran Chang,Cheng Yu,Xiangdong Liu
Infrared (IR) camouflage materials are essential for next generation stealth and information security technologies, yet most existing approaches, such as surface coating modifications or emissivity tunable thin films, lack programmability, adaptability, or long-term stability. Here, we report a programmable infrared thermally encodable film (ITEF), realized by microfluidic encapsulation of solid-liquid phase change materials (PCMs) into highly uniform microcapsules with precisely engineered core to shell ratios. Each capsule is regarded as a minimal thermal pixel and densely embedded within a flexible polydimethylsiloxane (PDMS) matrix, enabling the thin film to write, erase, and reconfigure infrared patterns in real time. Through a systematic investigation of multiple key parameters including capsule spacing, capsule diameter, core to shell ratio, phase transition temperature of the PCMs, and heating conditions, we demonstrate that the onset time, duration, and complexity of encoded signals can be rationally tailored according to demand. By integrating PCMs with distinct phase transition temperatures, the ITEFs generate both static and sequentially evolving infrared images, thereby achieving dynamic thermal encryption and adaptive camouflage. This study establishes a versatile strategy for tunable and programmable IR materials, transforming individual capsules into functional thermal pixels and opening new opportunities in stealth technologies, thermal encryption, and intelligent thermal management.
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CARBON
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2025
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IF 11.6
Hongsheng Liang,Tian Hou,Tiancheng Liu,Shengchong Hui,Zhaoyang Hou,Zhen Wang,Bin Shi,Limin Zhang,Hao Shen,Hongjing Wu
Comprehensively understanding the role of interfacial engineering in tailoring dielectric response is essential for the development of next-generation electromagnetic wave (EMW) absorbers. Rare-earth oxides, with their flexible valence states and localized 4f orbitals, hold great potential to mediate interfacial charge transfer and polarization, yet the electromagnetic loss mechanisms underlying such effects remain unclear. Here, we demonstrate a rare-earth oxide–regulated interfacial engineering strategy, where the incorporation of CeO 2 into NiCo 2 O 4 constructs abundant heterointerfaces with dynamic valence states. Such CeO 2 -induced interfacial polarization markedly strengthens dielectric response and facilitates impedance matching, thereby surpassing the limitations of single-phase components. Dielectric analysis reveals that polarization loss dominates (>88 %) within the absorption band, while conduction loss plays a secondary role. The results show that interfacial charge redistribution driven by Ce 3+ /Ce 4+ redox flexibility, which creates abundant interfacial polarization centers and enhances relaxation. As a result, the optimized NiCo 2 O 4 /CeO 2 –T3 delivers outstanding EMW absorption, achieving a broad effective absorption bandwidth of 6.37 GHz at 2.00 mm and reflection loss of −60.09 dB at 2.20 mm (>99.99 % attenuation). This study establishes rare-earth oxide–enabled interfacial engineering as a powerful paradigm for amplifying interfacial polarization and guides the rational design of high-performance, lightweight EMW absorbers.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Jiangnan Chen,Zhouchao Wang,Lin Xu,Huifang Wang,Xianghua Gao,Baolong Niu,Wenfeng Li
In the realm of glucose detection, nickel-based and copper-based nanocomposites have garnered significant attention due to their exceptional catalytic performance and high sensitivity. This study realized linear detection across dual concentration ranges in alkaline media by in situ growing Ni/Cu-BTC spherical nanocatalysts on reduced graphene oxide (rGO). From 350 μM to 2.95 mM, with a low detection limit (LOD L ) of 21.7 μM (S/N = 3) and a sensitivity (S L ) of 40 nA mM −1 cm −2 ; from 2.95 mM to 9.45 mM, the high-concentration detection limit (LOD H ) is 1.1 mM (S/N = 3), with an improved sensitivity (S H ) of 165.7 nA mM −1 cm −2 . The response time (t) is under 2 s. Additionally, the sensor demonstrated robust interference resistance, excellent stability (%RSD = 3.57 %), repeatability (%RSD = 2.27 %), and reproducibility (%RSD = 2.34 %). In real-world sample testing, this sensor measured glucose concentrations in plasma from healthy individuals both on an empty stomach and half an hour after eating, with a relative standard deviation range of 0.94 %–2.33 %. These results suggest that the rGO-Ni/Cu-BTC composite is a promising enzyme-free electrochemical sensing material for glucose detection
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APPLIED CLAY SCIENCE
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2025
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IF 5.8
Guixiang Wang,Qizi Wu,Maomao Guo,Shilong Zhang,Qiuyan Luo,Hao Yu,Xuyan Guo,Fuqiu Ma,Haining Feng,Ruizhi Wu,Boris Krit
In this study, a novel CoZnAl-LDH coating was synthesized in-situ on anodized aluminum through a hydrothermal method without introducing trivalent metal salts. Subsequently, a vanadate-intercalated LDH-VS coating was fabricated via ion exchange and hexadecyltrimethoxysilane (HDTMS) self-assembly, which integrated long-term corrosion resistance, friction reduction, and superhydrophobicity into a single coating. The morphology and structure of the coatings were investigated using SEM, EDS, XRD, FT-IR, and XPS. The coating performance was evaluated through scratch tests, contact angle, electrochemical, and friction wear tests. The results demonstrated that the contact angle of the LDH-VS increased from 26° to 154° and remained above 120° even after prolonged immersion, exhibiting outstanding self-cleaning and antifouling properties. After 28 days of immersion in 3.5 wt% NaCl solution, the corrosion current density of LDH-VS decreased by four orders of magnitude to 8.09 × 10 −9 A·cm −2 compared to bare aluminum alloy and the microstructure remained intact, indicating excellent long-term corrosion resistance. Friction tests confirmed the superior friction reduction of the modified coating, with the average friction coefficient of LDH-VS decreasing to 0.28, significantly lower than that of the aluminum alloy. Scratch tests also verified the coating's excellent adhesion strength. This study provides new insights into the development and application of LDH in superhydrophobicity, long-term corrosion protection, and wear resistance.
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