Coatings最新文献_第3页

Surface-Anchored Zirconium Phosphate via Polydopamine Coating on Ion-Exchange Resin for Rapid, High-Capacity Cs+ Capture 离子交换树脂上聚多巴胺涂层表面锚定磷酸锆的快速、高容量Cs+捕获

3区材料科学

Coatings Pub Date : 2025-12-05 DOI: 10.3390/coatings15121430

Yu Gao, Zhao Xu, Yilin Xie, Shiyu Yan, Lichun Xiao, Kairong Ding, Jing Cai, Qina Sun

{"title":"Surface-Anchored Zirconium Phosphate via Polydopamine Coating on Ion-Exchange Resin for Rapid, High-Capacity Cs+ Capture","authors":"Yu Gao, Zhao Xu, Yilin Xie, Shiyu Yan, Lichun Xiao, Kairong Ding, Jing Cai, Qina Sun","doi":"10.3390/coatings15121430","DOIUrl":"https://doi.org/10.3390/coatings15121430","url":null,"abstract":"In this study, a novel hybrid adsorbent polydopamine-based nano-zirconium phosphate coated resin (DPZrP) was successfully synthesized, where zirconium phosphate (ZrP) was surface-anchored onto a polystyrene ion-exchange resin (D001) via polydopamine (PDA) mediation. Characterization results indicated that PDA, acting as an interfacial bridge, not only achieved the stable loading of ZrP but also exerted a spatial confinement effect on ZrP through its polymeric cross-linked structure, thereby effectively suppressing the agglomeration of nanoparticles. Compared with pristine D001 and pure ZrP, the hybrid material DPZrP exhibited superior adsorption performance for Cs+. The adsorption capacity of DPZrP for Cs+ reached a theoretical maximum of 921.99 mg/g at 333 K. Adsorption kinetic studies indicated that adsorption equilibrium was reached within 120 min, and the reaction rate constant was 1.55 times that of DZrP. The pH effect experiment showed that DPZrP maintained Cs+ removal rates of 73.4% and 58.1% under strongly acidic (pH = 2) and strongly alkaline (pH = 12) conditions, respectively. When the molar ratio of Ca2+ to Cs+ was as high as 64, the Cs+ removal rate of DPZrP was 19.3% and 30.4% higher than those of DZrP and D001, respectively. Dynamic column experiments revealed that after treating 2000 bed volumes of simulated wastewater ([Cs+]0 = 2.5 mg/L), the Cs+ concentration in the effluent remained below 0.5 μg/L, with breakthrough occurring at 3000 BV. After five consecutive adsorption–desorption cycles, the Cs+ removal rate of DPZrP remained at 88.4%. These studies confirmed the dispersion effect of PDA on ZrP, and the synthesized DPZrP possessed both rapid capture ability and high adsorption capacity for Cs+. Thus, it provides an efficient adsorbent for the safe purification of nuclear waste liquids.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 12","pages":"1430-1430"},"PeriodicalIF":0.0,"publicationDate":"2025-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147909807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional MXene/GO/rGO-Textile Flexible Sensor with Outstanding Electrothermal and Strain-Sensing Performance for Wearable Applications 多功能MXene/GO/rGO-Textile柔性传感器，具有出色的电热和应变传感性能，可穿戴应用

3区材料科学

Coatings Pub Date : 2025-11-26 DOI: 10.3390/coatings15121381

Rong Zeng, Han Zhang, Jiaqing Huang, Hao Rui, Yuxin Wei, Yige Liu, Xinyue Liao, Birong Pi, Xinghua Hong

{"title":"Multifunctional MXene/GO/rGO-Textile Flexible Sensor with Outstanding Electrothermal and Strain-Sensing Performance for Wearable Applications","authors":"Rong Zeng, Han Zhang, Jiaqing Huang, Hao Rui, Yuxin Wei, Yige Liu, Xinyue Liao, Birong Pi, Xinghua Hong","doi":"10.3390/coatings15121381","DOIUrl":"https://doi.org/10.3390/coatings15121381","url":null,"abstract":"To address the inherent limitations of easy oxidation and unstable electrical properties in two-dimensional MXene-based flexible sensors, this study developed a MXene/GO/rGO (reduced graphene oxide) textile-based flexible sensor using a lamination method and in situ steam reduction technology. The sensor was constructed on a high-elasticity knitted polyester fabric, with MXene as the primary conductive layer, graphene oxide (GO) as the adhesive layer, and reduced graphene oxide (rGO) as the protective encapsulation surface layer. The tensile strain-sensing and electrothermal properties of the resulting e-textile were systematically characterized. The MXene/GO/rGO textile demonstrated outstanding electrical and mechanical performance, achieving a conductivity of 39.7 S·m−1, a gauge factors ranging from –3 to –1.6, and a controllable electrothermal heating range from 43 °C to 85 °C under currents of 0.02–0.05 A. Experimental results demonstrated that under applied currents of 0.02, 0.03, 0.04, and 0.05 A, the fabric reached temperatures of 43, 56, 73, and 85 °C, respectively, and remained constant over extended periods. In terms of strain sensing, the sensor exhibited a short response time (65 ms), high discriminability for different strain levels and stretching rates, and a consistent relative resistance change (ΔR/R0) under various stretching speeds (0.5, 1, 2, 4, and 6 mm/s). Compared with sensors based on a single conductive material, the MXene/GO/rGO polyester fabric sensor shows superior electrothermal and strain-sensing performance, indicating promising potential for applications in intelligent wearable textiles such as medical thermal therapy, sports monitoring, and health management.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 12","pages":"1381-1381"},"PeriodicalIF":0.0,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synergistic Effects of MXene and Carbon Nanotubes in Multi-Stimuli-Responsive Chitosan Materials: Combining Shape Memory and Electromagnetic Shielding Functions MXene和碳纳米管在多刺激响应壳聚糖材料中的协同效应：结合形状记忆和电磁屏蔽功能

3区材料科学

Coatings Pub Date : 2025-11-15 DOI: 10.3390/coatings15111332

Ziyun Li, Shuai Yang, Sitong Wang, Jiaying Liu, Ning Guo, Zhichao He, Zijian Song, Yingchun Li

{"title":"Synergistic Effects of MXene and Carbon Nanotubes in Multi-Stimuli-Responsive Chitosan Materials: Combining Shape Memory and Electromagnetic Shielding Functions","authors":"Ziyun Li, Shuai Yang, Sitong Wang, Jiaying Liu, Ning Guo, Zhichao He, Zijian Song, Yingchun Li","doi":"10.3390/coatings15111332","DOIUrl":"https://doi.org/10.3390/coatings15111332","url":null,"abstract":"Shape memory polymers (SMPs) are a class of smart materials that exhibit unique shape-fixing and recovery abilities, attracting wide attention for applications in electronics, aerospace, and biomedical engineering. Chitosan (CS) as a renewable biopolymer, possessing good biocompatibility, biodegradability, and antimicrobial properties; its use as a matrix enhances the environmental compatibility and bio-adaptability of SMPs. MXene, as a novel two-dimensional material, is characterized by high electrical conductivity, abundant surface functional groups and good hydrophilicity, showing potential in energy storage, electromagnetic shielding and sensing. In this work, CS and poly (vinyl alcohol) (PVA) were used as the polymer matrix, and carbon nanotubes (CNTs) together with MXene were introduced as co-fillers to construct multifunctional composites. The effect of the CNTs/MXene hybrid fillers on mechanical properties, electromagnetic shielding and multi-stimuli-responsive shape memory behavior was systematically investigated. After ratio optimization, the composites showed excellent comprehensive performance: tensile strength reached up to 20.0 MPa, Young’s modulus up to 292.2 MPa, and maximum elongation at break of 23.2%; electromagnetic interference shielding effectiveness (SET) in the X-band (8.2–12.4 GHz) reached a maximum of 10.6 dB; shape fixation rates exceeded 90%; under thermal stimulation, a shape recovery ratio of 98.3% was achieved within 41.7 s; light-driven recovery rate reached 86.5% with a minimal recovery time of 82.3 s; under electrical stimulation the highest recovery rate was 94.1% with a shortest recovery time of 30 s. This study successfully prepared functional multi-stimuli-responsive shape memory composite films and provided a new strategy for the design of green smart materials.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 11","pages":"1332-1332"},"PeriodicalIF":0.0,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/11/1332/pdf?version=1763191753","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147889430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Environmentally Friendly Silk Fibroin/Polyethyleneimine High-Performance Triboelectric Nanogenerator for Energy Harvesting and Self-Powered Sensing 环保丝素/聚乙烯亚胺高性能摩擦电纳米发电机，用于能量收集和自供电传感

3区材料科学

Coatings Pub Date : 2025-11-12 DOI: 10.3390/coatings15111323

Ziyi Guo, Xinrong Xu, Yue Shen, Menglong Wang, Y. ZHAI, Haiyan Zheng, Jiqiang Cao

{"title":"Environmentally Friendly Silk Fibroin/Polyethyleneimine High-Performance Triboelectric Nanogenerator for Energy Harvesting and Self-Powered Sensing","authors":"Ziyi Guo, Xinrong Xu, Yue Shen, Menglong Wang, Y. ZHAI, Haiyan Zheng, Jiqiang Cao","doi":"10.3390/coatings15111323","DOIUrl":"https://doi.org/10.3390/coatings15111323","url":null,"abstract":"Due to the large emissions of greenhouse gases from the burning of fossil fuels and people’s demand for green materials and energy, the development of environmentally friendly triboelectric nanogenerators (TENGs) is becoming increasingly significant. Silk fibroin (SF) is considered an ideal biopolymer candidate for fabricating green TENGs due to its biodegradability and renewability. However, its intrinsic brittleness and relatively weak triboelectric performance severely limit its practical applications. In this study, SF was physically blended with poly(ethylenimine) (PEI), a polymer rich in amino groups, to fabricate SF/PEI composite films. The resulting films were employed as tribopositive layers and paired with a poly(tetrafluoroethylene) (PTFE) tribonegative layer to assemble high-performance TENGs. Experimental results revealed that the incorporation of PEI markedly enhanced the flexibility and electron-donating capability of composite films. By optimizing the material composition, the SF/PEI-based TENG achieved an open-circuit voltage as high as 275 V and a short-circuit current of 850 nA, with a maximum output power density of 13.68 μW/cm2. Application tests demonstrated that the device could serve as an efficient self-powered energy source, capable of lighting up 66 LEDs effortlessly through simple hand tapping and driving small electronic components such as timers. In addition, the device can function as a highly sensitive self-powered sensor, capable of generating rapid and distinguishable electrical responses to various human motions. This work not only provides an effective strategy to overcome the intrinsic limitations of SF-based materials but also opens up new avenues for the development of high-performance and environmentally friendly technologies for energy harvesting and sensing.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 11","pages":"1323-1323"},"PeriodicalIF":0.0,"publicationDate":"2025-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/11/1323/pdf?version=1762949512","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel Omniphobic Teflon/PAI Composite Membrane Prepared by Vacuum-Assisted Dip-Coating Strategy for Dissolved Gases Separation from Transformer Oil 真空辅助浸涂法制备变压器油中溶解气体分离用全疏聚四氟乙烯/PAI复合膜

3区材料科学

Coatings Pub Date : 2025-11-11 DOI: 10.3390/coatings15111319

Wei Zhang, Qiwei Yang, Yuanyuan Jin, Yuebo Meng, Leyu Shen, Xuran Zhu, Haifeng Gao, Chuan Chen

{"title":"Novel Omniphobic Teflon/PAI Composite Membrane Prepared by Vacuum-Assisted Dip-Coating Strategy for Dissolved Gases Separation from Transformer Oil","authors":"Wei Zhang, Qiwei Yang, Yuanyuan Jin, Yuebo Meng, Leyu Shen, Xuran Zhu, Haifeng Gao, Chuan Chen","doi":"10.3390/coatings15111319","DOIUrl":"https://doi.org/10.3390/coatings15111319","url":null,"abstract":"Omniphobic membranes have gained extensive attention for mitigating membrane wetting in robust membrane separation owing to the super-repulsion toward water and oil. In this study, a Teflon/PAI composite membrane with omniphobic characteristics was prepared by a vacuum-assisted dip-coating strategy on the PAI hollow fiber membrane. A series of characterizations on morphological structure, surface chemical composition, wettability, permeability, mechanical properties, and stability were systematically investigated for pristine PAI and Teflon/PAI composite membranes. Subsequently, the experiment was conducted to explore the oil–gas separation performance of membranes, with standard transformer oil containing dissolved gas as the feed. The results showed that the Teflon AF2400 functional layer was modified, and C-F covalent bonds were introduced on the composite membrane surface. The Teflon/PAI composite membrane exhibited excellent contact angles of 156.3 ± 1.8° and 123.0 ± 2.5° toward DI water and mineral insulating oil, respectively, indicating omniphobicity. After modification, the membrane tensile stress at break increased by 23.0% and the mechanical performance of the composite membrane was significantly improved. In addition, the Teflon/PAI composite membrane presented satisfactory thermal and ultrasonic stability. Compared to the previous membranes, the Teflon/PAI composite membrane presented a thinner Teflon AF2400 separation layer. Furthermore, the omniphobic membrane demonstrated anti-wetting performance by reaching the dynamic equilibrium within 2 h for the dissolved gases separated from the insulating oil. This suggests an omniphobic membrane as a promising alternative for oil–gas separation in monitoring the operating condition of oil-filled electrical equipment online.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 11","pages":"1319-1319"},"PeriodicalIF":0.0,"publicationDate":"2025-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/11/1319/pdf?version=1762861553","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Properties of Composite Cementitious Material Based on Steel Slag, Coal-Fired Slag, and Desulfurization Gypsum 钢渣、煤渣、脱硫石膏复合胶凝材料的制备及性能研究

3区材料科学

Coatings Pub Date : 2025-11-03 DOI: 10.3390/coatings15111280

Zhihao Li, Yunchun Zhang, Xuejuan Cao, Jue Li, Ying Yuan

{"title":"Preparation and Properties of Composite Cementitious Material Based on Steel Slag, Coal-Fired Slag, and Desulfurization Gypsum","authors":"Zhihao Li, Yunchun Zhang, Xuejuan Cao, Jue Li, Ying Yuan","doi":"10.3390/coatings15111280","DOIUrl":"https://doi.org/10.3390/coatings15111280","url":null,"abstract":"To enhance the efficient utilization of industrial solid waste and support the low-carbon transition of cementitious materials, this study used steel slag, coal-fired slag, and desulfurization gypsum as the primary raw materials. A high-performance composite cementitious material system was developed based on the synergistic effects of physical activation (mechanical grinding) and chemical activation (alkali stimulation). This study systematically investigates the raw material characteristics, mix proportion optimization, mechanical behavior, and durability of composite cementitious materials through the integration of response surface optimization design and multi-scale analysis methods. The results indicate that the optimal mix proportions of the composite cementitious material are: 37.2% steel slag, 33.2% coal-fired slag, 9.6% desulfurized gypsum, 20% cement, 4% sodium silicate, and 0.1% superplasticizer. At this mix proportion, the measured 28-day average compressive strength of the composite cementitious material was 40.8 MPa, which closely matched the predicted value of 41.2 MPa from the response surface regression model, thereby confirming the model’s accuracy and applicability. The composite cementitious material demonstrated superior volume stability compared to ordinary cement under both water-curing and drying conditions. However, its freeze–thaw resistance and carbonation resistance were lower than those of cement. Therefore, considering these factors comprehensively, the composite cementitious material is recommended for application in road base and subbase layers.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 11","pages":"1280-1280"},"PeriodicalIF":0.0,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/11/1280/pdf?version=1762154670","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147915936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple Spray Preparation of Multifunctional Organic–Inorganic Hybrid Coatings for Surface Strengthening of Flat Thin-Sheet Materials 平面薄板材料表面强化用多功能有机-无机杂化涂层的简单喷涂制备

3区材料科学

Coatings Pub Date : 2025-11-02 DOI: 10.3390/coatings15111267

Xianbo Yu, Huaxin Li, Hu Chen, Shuao Xie, Wei Han, Xiaoxue Xi, Zhongbo Hu, Xian Yue, Junhui Xiang

{"title":"Simple Spray Preparation of Multifunctional Organic–Inorganic Hybrid Coatings for Surface Strengthening of Flat Thin-Sheet Materials","authors":"Xianbo Yu, Huaxin Li, Hu Chen, Shuao Xie, Wei Han, Xiaoxue Xi, Zhongbo Hu, Xian Yue, Junhui Xiang","doi":"10.3390/coatings15111267","DOIUrl":"https://doi.org/10.3390/coatings15111267","url":null,"abstract":"To enhance the mechanical performance and surface hydrophobicity of flat thin-sheet materials, we have developed a facile, environmentally benign, and low-cost synthesis strategy for fabricating a robust waterborne superhydrophobic coating with excellent mechanical reinforcement, via simple spray coating using a non-fluorinated material system (waterborne silicone–acrylic copolymer and silica sol). The functional coating exhibited excellent hydrophobicity (water contact angle: 150°) regardless of the compound of the substrates, which is primarily ascribed to the presence of abundant low-surface-energy methyl groups on the coating’s surface, along with the three-dimensional hierarchical network structure formed via the cross-linked silica network. Owing to the stable cross-linked structure and strong interfacial bonding between the acrylic polymer and silica network, the composite coating exhibited exceptional mechanical reinforcement, coupled with ultrahigh mechanical and chemical stability. Specifically, the maximum flexural fracture load of the modified materials increased from 119 N to 192 N, representing a 62.7% enhancement; similarly, the moisture-induced deflection of the samples had a significant increase from −14.5 mm to −3.01 mm, which confirmed that the mechanical properties of the modified sample and its deformation resistance under high humidity conditions have been significantly enhanced. Notably, the coating retained superior hydrophobicity and mechanical performance even after 50 abrasion cycles, as well as exposure to high-intensity UV radiation and corrosive acidic/alkaline environments. Furthermore, the composite functional coating demonstrated excellent self-cleaning and anti-fouling properties. This functional composite coating offers significant potential for large-scale industrial application.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 11","pages":"1267-1267"},"PeriodicalIF":0.0,"publicationDate":"2025-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrodeposition of Fine-Grained Tungsten Coatings on CuCrZr Alloy Substrates from Relatively Low Temperature KF-KCl-WO3 Molten Salt System 低温KF-KCl-WO3熔盐体系在CuCrZr合金基体上电沉积细晶钨涂层

3区材料科学

Coatings Pub Date : 2025-10-17 DOI: 10.3390/coatings15101219

Xiaoxu Dong, Wenqi Liu, Yusha Li, Zeyu Gao, Yingchun Zhang

{"title":"Electrodeposition of Fine-Grained Tungsten Coatings on CuCrZr Alloy Substrates from Relatively Low Temperature KF-KCl-WO3 Molten Salt System","authors":"Xiaoxu Dong, Wenqi Liu, Yusha Li, Zeyu Gao, Yingchun Zhang","doi":"10.3390/coatings15101219","DOIUrl":"https://doi.org/10.3390/coatings15101219","url":null,"abstract":"To address the issue in the pure oxide molten salt system Na2WO4-WO3, where the relatively high melting temperature often causes thermal corrosion of the base material and reduces electrodeposition efficiency. A new molten salt system for electrodeposition tungsten coatings on CuCrZr substrates at relatively low temperatures was investigated. The crystal structure and microstructure of the tungsten coatings were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The results indicate that the power supply mode, current density, and duty cycle significantly affect the microstructure, crystalline characteristics, and overall performance of the tungsten coating. Pure tungsten coatings were successfully fabricated on CuCrZr substrates at 943 K. The best electrodeposition parameters were determined to be a current density of 40 mA/cm2 and a duty cycle of 40%. Moreover, after prolonged electrodeposition (60 h), the tungsten coatings retained fine grains, with sizes ranging from 2 μm to 6 μm.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 10","pages":"1219-1219"},"PeriodicalIF":0.0,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/10/1219/pdf?version=1760686286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influences of SiO2 Additions on the Structures and Thermal Properties of AlTaO4 Ceramics as EBC Materials SiO2添加量对铝陶陶瓷EBC材料结构和热性能的影响

3区材料科学

Coatings Pub Date : 2025-10-13 DOI: 10.3390/coatings15101204

Bingyan Wu, Luyang Zhang, Lin Chen, Jiankun Wang, Z. Gao, Jing Feng

{"title":"Influences of SiO2 Additions on the Structures and Thermal Properties of AlTaO4 Ceramics as EBC Materials","authors":"Bingyan Wu, Luyang Zhang, Lin Chen, Jiankun Wang, Z. Gao, Jing Feng","doi":"10.3390/coatings15101204","DOIUrl":"https://doi.org/10.3390/coatings15101204","url":null,"abstract":"Ceramic matrix composites (CMCs) are extensively utilized in aero engines due to their high-temperature stability; however, they are prone to environmental corrosion at high temperatures, and environmental barrier coatings (EBCs) are necessary to resist oxidation and corrosion. Among various EBC materials, AlTaO4 offers high cost-effectiveness and low thermal expansion coefficients (TECs), but its resistance to SiO2 erosion and high-temperature stability remain unclear. We investigated the influences of SiO2 additions on the structures and thermal properties of AlTaO4; and AlTaO4 mixtures containing 10 wt.% SiO2 were kept at 1400 °C for 30–120 h. AlTaO4 exhibited excellent high-temperature phase stability, and SiO2 dissolved into AlTaO4 to generate a solid solution. XRD Rietveld refinement was employed to confirm the position of Si in the lattices, while SEM and EDS characterizations demonstrated the homogeneous distribution of Si, Al, and Ta elements. At 1200 °C, the TECs of SiO2-AlTaO4 (4.65 × 10−6 K−1) were close to those of SiC (4.5–5.5 × 10−6 K−1). Additionally, the addition of SiO2 could reduce TECs of AlTaO4, a feature that helped alleviate the interface thermal stress between AlTaO4 and the Si bond coat in the EBC systems. At 900 °C, the thermal conductivity was reduced by 26.9% compared to that of AlTaO4, and the lowest value was 1.65 W·m−1·K−1. Accordingly, SiO2 will enter the lattices of AlTaO4 after heat treatments at 1400 °C, and SiO2 additions will reduce the thermal conductivity and TECs of AlTaO4, which is beneficial for its EBC applications.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 10","pages":"1204-1204"},"PeriodicalIF":0.0,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/10/1204/pdf?version=1760354181","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Aging Characteristics and Interfacial Adhesion Performance of Polyurethane-Modified Asphalt 聚氨酯改性沥青老化特性及界面粘接性能研究

3区材料科学

Coatings Pub Date : 2025-10-11 DOI: 10.3390/coatings15101194

Meng Wang, Jixian Li, Lu Chen, Changyun Shi, Jinguo Ge

{"title":"Research on Aging Characteristics and Interfacial Adhesion Performance of Polyurethane-Modified Asphalt","authors":"Meng Wang, Jixian Li, Lu Chen, Changyun Shi, Jinguo Ge","doi":"10.3390/coatings15101194","DOIUrl":"https://doi.org/10.3390/coatings15101194","url":null,"abstract":"Polyurethane (PU), owing to its superior physicochemical properties, is considered an ideal modifier for asphalt. To improve the mechanical performance and service durability of asphalt pavements, PU-modified asphalts with varying dosages were prepared and evaluated through laboratory experiments and molecular dynamics simulations. Rheological, thermodynamic, and mechanical tests, as well as asphalt–aggregate adhesion energy calculations, were conducted to elucidate the modification mechanism, aging resistance, and interfacial behavior. The results showed that PU incorporation significantly enhanced rutting resistance at high temperatures, flexibility at low temperatures, and overall load-bearing capacity. Under ultraviolet and long-term aging, PU-modified asphalts exhibited notably lower performance degradation than base asphalt. At the molecular level, PU absorbed light fractions and formed a cross-linked network, reducing the free volume fraction and strengthening resistance to deformation. Moreover, PU substantially improved asphalt–aggregate adhesion energy, thereby reinforcing interfacial bonding. These findings provide theoretical insights and practical guidance for the optimal design and engineering application of PU-modified asphalt.","PeriodicalId":10520,"journal":{"name":"Coatings","volume":"15 10","pages":"1194-1194"},"PeriodicalIF":0.0,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2079-6412/15/10/1194/pdf?version=1760164138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0