Materials Chemistry and Physics最新文献

英文中文

Needle-type and spherical-shaped hydroxyapatite nanoparticles modified with graphene nanoplatelets and silver nanoparticles blended cementitious composites

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-11 DOI: 10.1016/j.matchemphys.2025.130534

Barış Şimşek , Tayfun Uygunoğlu , Özge Bildi Ceran , Ugur Fidan

Biocompatible hydroxyapatite nanoparticles (HPs) could be an important candidate for designing sustainable building materials due to the availability of abundant natural resources. HPs modified with conductive nanoparticles could be promising sustainable construction materials for smart buildings. This study investigated the mechanical and electromechanical properties of needle-type and spherical-shaped HPs modified with graphene nanoplatelets (NGP) and silver nanoparticles (AgNPs)-cement pastes. The results show that the HP concentration was a key factor in the increase of mechanical properties, while the hybridization of NGP and AgNPs with HPs plays a key role in improving the electromechanical properties of cement pastes. The success of the needle-type structure under flexural loading was attributed to the better adhesion of the 1D shape to the cement mortar. Remarkable average stress sensitivity of −4.55 % MPa⁻¹ and −8.78 % MPa⁻¹ were obtained by the samples of pH10G01Ag01 and nH10G01Ag01, respectively, with a linearity error below 0.1 %. A stress sensitivity of −4.12 % MPa⁻¹ was achieved with nH10G01Ag01, while the linear error of 0.25 % was still relatively high. It is concluded that the needle-type HPs behave as an adsorption center for NGP and AGNPs and provide an effective conductive path and overlapping nanoparticles to improve the sensing properties of cement mortars. The main effect plots show a significant effect of AgNPs support on the increase in mechanical and electromechanical properties of HPs-cement pastes by gap-filling and molecular interaction ability of AGNPs.

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引用次数: 0

High-voltage pulse electropolishing of niobium and 3.9 GHz SRF cavity in ionic liquid electrolytes without hydrofluoric acid

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130506

Kaixin Li , Zhenjun Peng , Shengxue Zhang , Lu Li , Qingwei Chu , Teng Tan , Yuan He , Cheng Lu , Xiaoyu Zhao

Superconducting radio frequency (SRF) cavities' inner surfaces must be buffer chemical polished (BCP) or electropolished (EP) to remove the damaged layer. The better smoothness of the SRF cavity's inner surface can improve its performance. This paper is the first to use ionic liquids and high-voltage pulse electropolishing (hp-EP) for niobium and 3.9 GHz cavity, breaking through the limitations of traditional BCP and EP which must use HF and other concentrated acids, and significantly improving polishing efficiency. It systematically studies the main parameters of hp-EP, such as voltage, duty cycle, and ammonium fluoride concentration, on the effects of current density, polishing rate, and surface roughness. By summarizing hp-EP rules, it achieves controllable electropolishing of niobium. Surface analysis of Nb samples after hp-EP shows a reduction in surface roughness, resulting in a uniform, mirror-like niobium surface. Niobium samples achieve a rapid electropolishing rate under the combined action of electrochemical mechanisms and mechanical mechanisms. To observe the surface state of the 3.9 cavity after hp-EP, the tube and the cell part are treated separately. The electric field of the cell part is simulated by COMSOL Multiphysics, and different cathode electrodes were designed. The results demonstrate that the cathode electrode shape significantly affects the hp-EP effect. Finally, the inner surface of the tube and cell is polished to achieve a bright surface. This work provides a new perspective in the SRF field.

超导射频（SRF）腔体的内表面必须进行缓冲化学抛光（BCP）或电抛光（EP），以去除受损层。SRF 腔内表面的光滑度越高，其性能就越好。本文首次将离子液体和高压脉冲电抛光（hp-EP）用于铌和 3.9 GHz 腔体，突破了传统 BCP 和 EP 必须使用 HF 和其他浓酸的限制，显著提高了抛光效率。它系统研究了 hp-EP 的主要参数，如电压、占空比和氟化铵浓度，对电流密度、抛光速率和表面粗糙度的影响。通过总结 hp-EP 规律，实现了铌的可控电抛光。对经过 hp-EP 处理的铌样品进行的表面分析表明，表面粗糙度有所降低，从而形成了均匀的镜面铌表面。在电化学机制和机械机制的共同作用下，铌样品实现了快速电抛光。为了观察 3.9 腔体在 hp-EP 之后的表面状态，管子和电池部分被分开处理。利用 COMSOL Multiphysics 对电池部分的电场进行了模拟，并设计了不同的阴极电极。结果表明，阴极电极形状对 hp-EP 效果有显著影响。最后，对电子管和电池的内表面进行抛光，以获得光亮的表面。这项工作为 SRF 领域提供了一个新的视角。

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引用次数: 0

Electrolytic refinement of silver-enriched copper anodes for producing high-purity cathode copper utilizing ionic liquid additives

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130521

Yankun Li , Airong Xu , Haitao Liu , Chu Cheng , Chen Chen , Kexing Song , Jing Tian , Yingang Guo , Weiwei Lu

In the process of fabricating high-purity copper, the high silver (Ag) content in copper plates poses a significant impurity issue, adversely affecting the quality and appearance of cathode copper, such as purity and surface finish. Moreover, it diminishes the electrolytic efficiency during production and escalates costs. This study successfully reduced the silver content in cathode copper from 7 g/t to 4.5 g/t by employing 1-aminopropyl-3-methylimidazolium chloride ([C₃NH₂CIm][Cl]) as an single yet multifunctional additive to regulate the copper electrolytic refining process, thereby enhancing the purity of the cathode copper. The cathode copper products and anode slime prepared were characterized and analyzed using techniques such as SEM, XRD, and XPS. The findings indicated that [C₃NH₂CIm][Cl] exerts a flocculation effect on anode slime during electrolysis, mitigating the adhesion and inclusion of suspended anode slime in cathode copper. Furthermore, the silver decreasing efficacy of [C₃NH₂CIm][Cl] in the copper electrolytic refining process was investigated through electrochemical characterization. It was observed that [C₃NH₂CIm][Cl] can react with Ag⁺ to form precipitates, thereby reducing the concentration of Ag⁺ in the solution. Additionally, [C₃NH₂CIm][Cl] can complex with Ag⁺, elevating the electrode potential of Ag⁺ during the electrolytic refining process, making it less likely for Ag⁺ to be reduced at the cathode under comparable conditions. This research provides an effective additive strategy for improving the purity and production efficiency of copper.

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引用次数: 0

Preparation and properties of modified montmorillonite by zinc-phosphate for anticorrosion applications in protective coatings

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130537

Sergiy Korniy, Mariia-Olena Danyliak, Serhii Lavrys

Anticorrosion pigments based on natural montmorillonite modified with zinc cations and phosphate anions were obtained by liquid-phase two-stage ion exchange. They are the promising of being used as part of protective coatings on steel. The primary exchangeable calcium and sodium cations of montmorillonite were replaced by Zn²⁺ in its interlayer space, and bonds of PO₄⁻³ anions were formed on the edge surfaces of aluminium hydroxyl octahedra and silica tetrahedra of the montmorillonite structure by modification in the Na₃PO₄ solution with the addition of Zn(NO₃)₂ solution. The corrosion resistance of low-carbon steel increases in an acid rain environment with the addition of 2 g/l of modified Zn/P montmorillonites using potentiodynamic polarization, electrochemical impedance spectroscopy and weight loss test. The inhibitory efficiency of the montmorillonites depends on the concentration of the Na₃PO₄ solution. The Zn/P montmorillonite obtained from 0.05 M Na₃PO₄ solution had the highest inhibitory efficiency, which remained above 90 %. The protective effect of modified montmorillonites in an acid rain environment is based on the release of zinc cations from the interlayer space of the montmorillonite, which interact with OH⁻ anions to form metal hydroxides and the formation of iron phosphates with the stabilization of a protective film.

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引用次数: 0

First-principles investigation of physical, mechanical, thermodynamics and transport properties of tetragonal double perovskite Sr2MnSbO6: A DFT+U+SOC study

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130520

Lakhdar Benahmedi, Anissa Besbes, Radouan Djelti

In this study, we investigate the structural, electronic, elastic, and thermoelectric properties of the tetragonal Sr₂MnSbO₆ double perovskite using the full-potential linearized augmented plane wave (FP-LAPW) method within the WIEN2k code. The calculations were performed using the generalized gradient approximation (GGA-PBE), GGA-PBE + U, and the Tran-Blaha modified Becke-Johnson (TB-mBJ) potential to correct the exchange-correlation functional. Spin-orbit coupling (SOC) was applied to account for relativistic effects. The results confirm the stability of the ferromagnetic (FM) state, as evidenced by energy optimization. Notably, the compound exhibits robust half-metallicity, characterized by a semiconductor nature in the spin-down channel and metallic behavior in the spin-up channel, which is a key feature for efficient spintronic applications such as spin filters and magnetic sensors. Thermodynamic stability is affirmed by the negative formation energy and the absence of imaginary modes in the phonon dispersion curve. Mechanical analysis indicates that Sr₂MnSbO₆ is mechanically stable, with significant anisotropy, mechanical strength, and ductility. Furthermore, the thermoelectric performance shows a high Seebeck coefficient and favorable power factor, underscoring its promising potential for high-efficiency energy conversion devices. These findings not only validate Sr₂MnSbO₆ as a stable material but also highlight its groundbreaking potential in next-generation spintronic and thermoelectric technologies.

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引用次数: 0

Fabrication of RGO-based aerogel decorated with Core-shelled Ag@Fe3O4 nanospheres for High-performance electromagnetic wave absorption

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130531

Yulin Niu , Rui Xing

The limitations of single dielectric-loss materials have driven extensive research into designing electromagnetic wave (EMW) absorbers that achieve a balance between dielectric and magnetic losses. In this study, a lightweight, porous Ag@Fe₃O₄ modulated Reduced graphene oxide (RGO) aerogel was synthesized via a simple hydrothermal method to address this challenge. It can be seen that the Ag@Fe₃O₄-RGO composite demonstrates superior EMW absorption compared to pure RGO, achieving a minimum reflection loss (RL) of −50.6 dB at 8.64 GHz with an effective absorption bandwidth (EAB) of 7.5 GHz. The enhanced absorption performance is attributed to synergistic effects between impedance matching, interfacial polarization, and optimized attenuation constants. These results indicate that Ag@Fe₃O₄-RGO aerogel is expected to be a candidate material for EMW absorption.

引用次数: 0

Construction and characterization of 5,6-O-Isopropylidene-L-Ascorbic acid-loaded silver and manganese dioxide nanoparticles: Cytotoxicity study, antibacterial, and antioxidant activities

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130517

Mouhaned Y. Al-darwesh , Layth L. Hamid , Sattar S. Ibrahim , Mohammed A. Mohammed

Nanomaterials are increasingly recognized for their potential in biomedical applications due to their unique properties. This study introduces a novel approach to synthesizing and characterizing multifunctional silver (Ag) and manganese dioxide (MnO₂) nanoparticles (NPs) coated with 5,6-O-Isopropylidene-l-Ascorbic Acid (IAA), a vitamin C derivative. The primary objective was to evaluate their potential for antibacterial, antioxidant, antibiofilm, and anticancer applications. The nanocomposites were synthesized using chemical methods and characterized using FTIR, ¹H NMR, Mass spectroscopy, UV–vis, XRD, SEM, and TEM. Results demonstrated enhanced antibacterial activity, with inhibition zones ranging from 30 to 40 mm for Ag NPs-IAA and 14–33 mm for MnO₂ NPs-IAA. The minimum inhibitory concentrations (MIC) were 4–32 μg/mL and 16–64 μg/mL for Ag NPs-IAA and MnO₂ NPs-IAA, respectively. Antibiofilm activity reached 89 % for Ag NPs-IAA and 82 % for MnO₂ NPs-IAA. Antioxidant activity, assessed via DPPH scavenging, showed significant enhancement upon IAA loading, achieving 86.31 % for Ag NPs-IAA and 81.35 % for MnO₂ NPs-IAA. Cytotoxicity studies against MCF-7 and PC-3 cell lines revealed that the nanocomposites inhibited cell proliferation and induced apoptosis. These findings highlight the significant potential of IAA-encapsulated Ag NPs and MnO₂ NPs in antibacterial, antibiofilm, antioxidant, and anticancer therapies, paving the way for advanced therapeutic nanomaterials.

纳米材料因其独特的性能，在生物医学应用中的潜力日益得到认可。本研究介绍了一种合成和表征涂有 5,6-O-Isopropylidene-l-Ascorbic Acid（IAA）（一种维生素 C 衍生物）的多功能银（Ag）和二氧化锰（MnO₂）纳米粒子（NPs）的新方法。主要目的是评估它们在抗菌、抗氧化、抗生物膜和抗癌方面的应用潜力。纳米复合材料采用化学方法合成，并使用傅立叶变换红外光谱、1H NMR、质谱、紫外可见光、XRD、扫描电镜和 TEM 进行表征。结果表明，Ag NPs-IAA 和 MnO₂ NPs-IAA 的抑菌区分别为 30 至 40 毫米和 14 至 33 毫米。Ag NPs-IAA 和 MnO₂ NPs-IAA 的最小抑菌浓度（MIC）分别为 4-32 μg/mL 和 16-64 μg/mL。Ag NPs-IAA 和 MnO₂ NPs-IAA 的抗生物膜活性分别达到 89% 和 82%。通过 DPPH 清除率评估的抗氧化活性显示，添加 IAA 后抗氧化活性显著增强，Ag NPs-IAA 的抗氧化活性达到 86.31%，MnO₂ NPs-IAA 的抗氧化活性达到 81.35%。针对 MCF-7 和 PC-3 细胞系的细胞毒性研究表明，纳米复合材料可抑制细胞增殖并诱导细胞凋亡。这些研究结果突显了IAA封装的银纳米粒子和MnO₂纳米粒子在抗菌、抗生物膜、抗氧化和抗癌疗法方面的巨大潜力，为先进的治疗纳米材料铺平了道路。

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引用次数: 0

One-step synthesis of micron-sized silica particles by continuous dropwise addition: The effect of reaction parameters on particle size

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130525

ZhiCheng Zhao , ZhuoQun Han , XiaoLi Zhang , Walther Glaubitt , Jia Liu , QingXuan Zhou , Jian Li , Ying Xu , WeiRu Zhang , Yang Wang , Ling Li , FuTian Liu

In the modern electronic field, micron silicon dioxide has unique advantages in electronic packaging due to its low specific surface area, low light scattering, high stability, and low interface reactions. The conventional Stöber and Seed methods are limited by submicron sizes and secondary particles, respectively, hindering the production of micron-sized silica particles in a single step. The continuous drop addition method (CAM) overcomes this limitation by changing the growth state of the particles. In this paper, monodisperse and narrowly distributed silica particles with particle sizes ranging from 0.6 μm to 0.132 μm were obtained by the continuous drop addition method. The roles of tetraethyl orthosilicate (TEOS) addition rate, TEOS concentration and ammonia solution (NH₃·H₂O) volume on the final particle size of silica particles were discussed.

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引用次数: 0

Bio-based poly(hydroxyurethane)s of good thermal/mechanical properties upon insertion of polyamide segments

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130522

Yao Qin, Yanyan Wang, Yuanmeng Wang, Jingbo Zhao, Jue Cheng, Junying Zhang

Polyaddition of cyclic carbonates (CCs) and di- or polyamines to prepare polyhydroxyurethanes (PHUs) has been regarded as the most promising method to prepare non-isocyanate polyurethanes (NIPUs), granted it incorporates bio-based raw materials and achieves 100 % atom economy. However, low molar mass of bio-based linear PHUs leads to poor mechanical properties and heat resistance, greatly limiting their large-scale production and application as a substitute for conventional polyurethanes. In this study, a di(cyclic carbonate) with hexanediamide segments (HDADCC) was synthesized through a green transesterification of the di(1,2-diols) with dimethyl carbonate under mild reaction conditions. Furthermore, a series of bio-based diamino-terminated oligoamides (DAPADs) were prepared from bio-based dimer acid and decanediamine, effectively increasing the molecular weight of PHUs. Thermoplastic polyhydroxy(amide-urethane)s (PHAUs) were synthesized from the polyaddition of HDADCC with DAPADs. Notable polar difference between diamide segments and bulky alkyl groups resulted in nano-scale microphase separation and highly hydrophobic surfaces for PHAUs. The symmetrical diamide segments enhance the intermolecular forces of materials, while the flexible segments of DAPAD impart excellent toughness. As a result, the newly prepared PHAUs show excellent and tunable thermal and mechanical properties with the tensile strength and elongation at break reaching 19.4 MPa and 560.1 %, and a melting point of up to 100.7 °C. Essentially, this simple and efficient preparation method not only achieves green preparation of polyurethanes but also ensures good mechanical properties and heat resistance, providing a new perspective on the combination of excellent performance and environmental friendliness of polyurethane materials.

{"title":"Bio-based poly(hydroxyurethane)s of good thermal/mechanical properties upon insertion of polyamide segments","authors":"Yao Qin, Yanyan Wang, Yuanmeng Wang, Jingbo Zhao, Jue Cheng, Junying Zhang","doi":"10.1016/j.matchemphys.2025.130522","DOIUrl":"10.1016/j.matchemphys.2025.130522","url":null,"abstract":"<div><div>Polyaddition of cyclic carbonates (CCs) and di- or polyamines to prepare polyhydroxyurethanes (PHUs) has been regarded as the most promising method to prepare non-isocyanate polyurethanes (NIPUs), granted it incorporates bio-based raw materials and achieves 100 % atom economy. However, low molar mass of bio-based linear PHUs leads to poor mechanical properties and heat resistance, greatly limiting their large-scale production and application as a substitute for conventional polyurethanes. In this study, a di(cyclic carbonate) with hexanediamide segments (HDADCC) was synthesized through a green transesterification of the di(1,2-diols) with dimethyl carbonate under mild reaction conditions. Furthermore, a series of bio-based diamino-terminated oligoamides (DAPADs) were prepared from bio-based dimer acid and decanediamine, effectively increasing the molecular weight of PHUs. Thermoplastic polyhydroxy(amide-urethane)s (PHAUs) were synthesized from the polyaddition of HDADCC with DAPADs. Notable polar difference between diamide segments and bulky alkyl groups resulted in nano-scale microphase separation and highly hydrophobic surfaces for PHAUs. The symmetrical diamide segments enhance the intermolecular forces of materials, while the flexible segments of DAPAD impart excellent toughness. As a result, the newly prepared PHAUs show excellent and tunable thermal and mechanical properties with the tensile strength and elongation at break reaching 19.4 MPa and 560.1 %, and a melting point of up to 100.7 °C. Essentially, this simple and efficient preparation method not only achieves green preparation of polyurethanes but also ensures good mechanical properties and heat resistance, providing a new perspective on the combination of excellent performance and environmental friendliness of polyurethane materials.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"335 ","pages":"Article 130522"},"PeriodicalIF":4.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural influence on corrosion behavior and the TiO2 nanostructured layer growth in the Ti–10Mo–3Sn alloy

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-02-10 DOI: 10.1016/j.matchemphys.2025.130529

G.D. Bueno , I.V. Alves , M.G. Mello , L.S. Silva , R. Caram , A. Cremasco

β-metastable titanium alloys have received special attention in prosthesis manufacturing due to their good mechanical behavior and superior biocompatibility. Nonetheless, the addition of self-organized titanium (IV) oxide (TiO₂) on the component surface has been needed to improve its bioactivity and osseointegration. In this investigation, the effect of the substrate microstructure on corrosion behavior and TiO₂ nanotube formation was studied in the β-metastable Ti–10Mo–3Sn (% wt.) alloy. Self-organized TiO₂ was prepared by anodization of Ti–10Mo–3Sn (% wt.) alloy after solution heat treatment at 1000 °C and aging treatments at 500 °C and 600 °C. Changes in surface nanotopography were verified as a function of the substrate microstructure and the electrolyte composition. The presence of finer precipitation leads to a thicker layer of TiO₂ nanotubes and an increase in their diameters was observed at higher aging temperatures.

引用次数: 0

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