Next Materials最新文献_第10页

Novel synthesis of industrial and agro waste-derived non-autoclaved aerated geopolymer composites 工业和农业废弃物衍生的非蒸压曝气地聚合物复合材料的新合成

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.nxmate.2026.101626

A. Sheik Farid, Revathy Jayaseelan, Gajalakshmi Pandulu

Resource conservation in construction materials remains a critical challenge, with the valorisation of industrial by-products and agricultural residues offering a sustainable waste-to-resource pathway. In this study, aerated geopolymer composites synthesised from ground granulated blast furnace slag (GGBS) and rice husk ash (RHA) provide a low-carbon, non-autoclaved alternative to Portland cement, combining lightweight features with enhanced durability. Precursors combined with other constituent materials were mixed with aluminum powder as an aerating agent and activated using Na₂SiO₃/NaOH solutions of varying alkalinity (6–10 M). The mixture was then cured under ambient conditions, avoiding energy-intensive autoclaving. Results demonstrate that alkali concentration critically governs gel chemistry, pore refinement, and durability indices. The optimum mix (8 M) achieved balanced performance, with a compressive strength of 17.4 MPa, reduced density, refined porosity, low water absorption, and superior resistance against acid, sulphate, and seawater exposure. It also exhibited a thermal conductivity of 0.483 W/m.K, confirming the synergy of mechanical strength and thermal insulation. Microstructural and thermal analyses validated the formation of a dense C–A–S–H/N–A–S–H network with high thermal stability. Cost–carbon benchmarking further revealed substantial reductions in embodied CO₂ emissions (up to 80 %) and production costs (up to 50 %) compared to OPC, establishing ambient-cured aerated geopolymer composite mortars as a scalable and eco-efficient solution for sustainable infrastructure.

建筑材料的资源保护仍然是一项重大挑战，工业副产品和农业残留物的增值提供了一条可持续的废物转化为资源的途径。在这项研究中，由磨碎的粒状高炉矿渣（GGBS）和稻壳灰（RHA）合成的加气地聚合物复合材料提供了一种低碳、无需蒸压的波特兰水泥替代品，将轻质特性与增强的耐久性结合在一起。前驱体与其他组成材料混合，以铝粉为曝气剂，用不同碱度（6-10 M）的Na₂SiO₃/NaOH溶液进行活化。然后在环境条件下固化混合物，避免了能源密集型高压灭菌。结果表明，碱浓度对凝胶化学、孔隙细化和耐久性指标有重要影响。最佳配比（8 M）达到了平衡的性能，抗压强度为17.4 MPa，密度降低，孔隙度精细，吸水率低，抗酸、硫酸盐和海水暴露性能优越。其导热系数为0.483 W/m。K，确认机械强度和保温的协同作用。显微组织和热分析证实形成了致密的C-A-S-H / N-A-S-H网络，具有较高的热稳定性。成本-碳基准进一步显示，与OPC相比，隐含二氧化碳排放量（高达80% %）和生产成本（高达50% %）大幅减少，将环境固化充气地聚合物复合砂浆作为可持续基础设施的可扩展和生态高效解决方案。

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引用次数: 0

A multiscale computational approach to the thermoelectric of β-Cu2Se: Combining DFT+U and molecular dynamics β-Cu2Se热电的多尺度计算方法：结合DFT+U和分子动力学

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.nxmate.2026.101613

Faiza Baghida, Mourad Boughrara, Mohamed Kerouad

Thermoelectric materials offer a direct pathway for mitigating the global energy crisis by converting waste heat into usable electricity; however, their efficiency must be improved for largescale applications. To this end, we evaluate the high-potential material β-Cu₂Se through an integrated multiscale computational approach combining first-principles DFT+U calculations and molecular dynamics (MD) simulations. Our results reveal that β-Cu₂Se exhibits semiconducting behavior with a direct band gap of approximately 1.3 eV. The lattice thermal conductivity, κ_l, calculated via non-equilibrium molecular dynamics, decreases from 0.905 Wm⁻¹ K⁻¹ at 300 K to 0.410 Wm⁻¹ K⁻¹ at 800 K due to the superionic transition and enhanced phonon scattering. Over the temperature range of 300–800 K, the thermoelectric figure of merit, ZT, increases from 0.184 to 0.747, with peak performance at elevated temperatures driven by a high Seebeck coefficient and suppressed thermal conductivity. This study provides the first integrated DFT+U and MD assessment of both electronic and lattice thermal transport in β-Cu₂Se, offering a comprehensive evaluation of ZT that bridges the gap between electronic structure calculations and lattice dynamics simulations. Our findings demonstrate that β-Cu₂Se possesses favorable thermoelectric performance, making it a strong candidate for mid- to high-temperature energy conversion applications.

热电材料通过将废热转化为可用的电力，为缓解全球能源危机提供了一条直接途径；然而，为了大规模应用，它们的效率必须得到提高。为此，我们通过结合第一性原理DFT+U计算和分子动力学（MD）模拟的集成多尺度计算方法来评估高势材料β-Cu2Se。结果表明，β-Cu2Se具有半导体性质，其直接带隙约为1.3 eV。通过非平衡分子动力学计算，晶格热导率κl在300 K时从0.905 Wm−1 K−1下降到800 K时的0.410 Wm−1 K−1，这是由于超电子跃迁和声子散射增强所致。在300-800 K的温度范围内，热电优值ZT从0.184增加到0.747，由于高塞贝克系数和抑制热导率，在高温下性能达到峰值。本研究首次对β-Cu2Se的电子和晶格热输运进行了DFT+U和MD综合评估，为ZT提供了一个全面的评估，弥补了电子结构计算和晶格动力学模拟之间的差距。我们的研究结果表明，β-Cu2Se具有良好的热电性能，使其成为中高温能量转换应用的有力候选者。

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引用次数: 0

Stochastic dynamic analysis of FGSW plates resting on a Pasternak foundation under a moving mass considering parameter uncertainties 考虑参数不确定性的运动质量下帕斯捷尔纳克地基上FGSW板的随机动力分析

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-02-04 DOI: 10.1016/j.nxmate.2026.101687

Ngoc-Tu Do , Trung Thanh Tran

The main objective of this article is to investigate the stochastic dynamic response of functionally graded sandwich (FGSW) plates composed of a hard core and two functionally graded (FG) face sheets, resting on a Pasternak foundation (PF) and subjected to a moving mass (MM), while explicitly accounting for uncertainties in material properties and moving mass density. The uncertain parameters are modeled as random variables following normal probability distributions. A finite element formulation based on four-node (Q4) elements is developed within the framework of the refined first-order shear deformation theory (RFSDT), ensuring an accurate representation of transverse shear effects with high computational efficiency. The Pasternak foundation is incorporated through both spring and shear layer stiffness components. The accuracy and validity of the proposed formulation are rigorously verified through comparisons with available benchmark solutions, demonstrating excellent agreement. A comprehensive parametric investigation is then conducted to examine the effects of geometric dimensions, material properties, and foundation stiffness on the dynamic response. The results indicate that both geometric parameters and material properties have a significant influence on the dynamic behavior of the plate under deterministic as well as stochastic conditions. These findings provide valuable theoretical guidance and practical insights for the robust design and reliability assessment of advanced sandwich structures in transportation, aerospace, and defense engineering.

本文的主要目的是研究由一个硬核和两个功能梯度（FG）面板组成的功能梯度夹层（FGSW）板的随机动态响应，这些板位于帕斯捷尔纳克基础（PF）上，并受到移动质量（MM）的影响，同时明确考虑材料特性和移动质量密度的不确定性。将不确定参数建模为服从正态概率分布的随机变量。在精细化一阶剪切变形理论（RFSDT）框架下，建立了基于四节点（Q4）单元的有限元公式，保证了横向剪切效应的准确表达和较高的计算效率。帕斯捷尔纳克地基是通过弹簧和剪切层刚度组成的。通过与现有基准解决方案的比较，严格验证了所提出公式的准确性和有效性，证明了良好的一致性。然后进行了全面的参数调查，以检查几何尺寸，材料特性和基础刚度对动态响应的影响。结果表明，几何参数和材料性能对板在确定性和随机条件下的动力行为都有显著影响。这些发现为交通运输、航空航天和国防工程中先进夹层结构的稳健设计和可靠性评估提供了有价值的理论指导和实践见解。

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引用次数: 0

Correlation of structural and electrical properties of gadolinium-substituted cobalt ferrites for data storage applications 数据存储用钆取代钴铁氧体结构与电学性能的相关性

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-02-04 DOI: 10.1016/j.nxmate.2026.101654

Marjan Asif, Maryum Aftab, M. Anis-ur-Rehman

Gadolinium-substituted cobalt ferrite (CoFe_2-xGd_xO₄) nanoparticles with varying gadolinium concentrations (x = 0.0, 0.1, 0.2) were successfully synthesized via a sol-gel method to investigate their structural and electrical properties. The addition of gadolinium, a rare-earth element, is expected to enhance the material's structural and electrical properties, making it suitable for a wide range of applications, including data storage e.g.: ReRAM (Resistive Random Access Memory). X-ray diffraction (XRD) analysis confirmed the formation of a single-phase (∼100 % based on XRD analysis) spinel structure for all compositions, showing alterations such as a decrease in lattice parameter, volume, and crystallite size due to gadolinium substitution. The frequency-dependent dielectric constant, AC electrical conductivity, dielectric loss, dielectric loss tangent, and impedance were investigated in the frequency range of 100 Hz to 3 MHz. In AC analysis, AC electrical conductivity increases but dielectric constant and dielectric tangent loss decrease. In impedance, the contributions of grains and grain boundaries, as well as their effects within the spinel ferrite structure, are analyzed under ambient temperature conditions (∼25°C) to understand their impact on the material's overall electrical behavior. In DC analysis, DC resistivity and activation energy increase with increases in gadolinium concentration. The I-V measurements indicated the presence of resistive switching behavior with hysteresis loops present in all curves of Gd substituted CoFe nanoparticles. Our study offers a deep understanding of how gadolinium doping enhances the properties of cobalt ferrite, making it more suitable to be used in advanced technology applications like data storage. To the best of our knowledge, this work is the first to establish the direct correlation between Gd³⁺ substitution in CoFe₂O₄ and its resistive switching behavior governed by the space charge limited conduction (SCLC) mechanism, extending its potential toward ReRAM applications beyond conventional structure and dielectric studies.

采用溶胶-凝胶法制备了不同钆浓度（x = 0.0,0.1,0.2）的钆取代钴铁氧体（CoFe2-xGdxO4）纳米粒子，并对其结构和电学性能进行了研究。钆（一种稀土元素）的添加有望增强材料的结构和电性能，使其适用于广泛的应用，包括数据存储，例如：ReRAM（电阻式随机存取存储器）。x射线衍射（XRD）分析证实，所有成分都形成了单相尖晶石结构（根据XRD分析，为~ 100 %），由于钆取代，晶格参数、体积和晶粒尺寸都有所减少。在100 Hz至3 MHz的频率范围内，研究了频率相关的介电常数、交流电导率、介电损耗、介电损耗正切和阻抗。在交流分析中，交流电导率增大，但介电常数和介电正切损耗减小。在阻抗中，晶粒和晶界的贡献，以及它们在尖晶石铁素体结构中的影响，在环境温度条件下（~ 25°C）进行分析，以了解它们对材料整体电行为的影响。在直流分析中，直流电阻率和活化能随钆浓度的增加而增加。I-V测量结果表明，Gd取代的CoFe纳米颗粒存在电阻开关行为，且在所有曲线中都存在磁滞回线。我们的研究深入了解了钆掺杂如何增强钴铁氧体的性能，使其更适合用于数据存储等先进技术应用。据我们所知，这项工作首次建立了CoFe2O4中Gd3+取代与其由空间电荷限制传导（SCLC）机制控制的电阻开关行为之间的直接关系，将其应用于ReRAM的潜力扩展到传统结构和介电研究之外。

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引用次数: 0

A green approach to uric acid detection using reduced graphene oxide-decorated with medium entropy alloy electrodes 用中熵合金电极修饰还原氧化石墨烯的绿色尿酸检测方法

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-02-11 DOI: 10.1016/j.nxmate.2026.101656

Bapan Dhara, Piyush Vishwakarma, Chandan Srivastava

In this study, a medium entropy alloy (MEA) composed of nickel, chromium, iron, and copper was synthesized and investigated as an efficient electrochemical sensor for uric acid detection. To further improve sensing performance, MEA particles were decorated over reduced graphene oxide (rGO), forming a composite with improved electrochemical activity. The composite was synthesized via a green approach involving mechanical milling of graphite with metal powders followed by sonication-based exfoliation of the milled mixture. Electrochemical sensing performance was evaluated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). An optimized 50:50 wt ratio of MEA to rGO demonstrated the most effective sensing response. The optimized MEA-rGO composite sensor exhibited a linear current response across a wide uric acid concentration range (100–1000 µM) with a high sensitivity of 27 µA·µM⁻¹ ·cm⁻². These findings highlight the potential of MEA-rGO composites as robust and sensitive electrochemical sensors for biomedical applications.

本研究合成了一种由镍、铬、铁和铜组成的中熵合金（MEA），并对其作为一种高效的尿酸电化学传感器进行了研究。为了进一步提高传感性能，MEA颗粒被修饰在还原氧化石墨烯（rGO）上，形成具有提高电化学活性的复合材料。该复合材料是通过一种绿色的方法合成的，包括用金属粉末对石墨进行机械研磨，然后对研磨后的混合物进行基于声波的剥落。采用循环伏安法（CV）和差分脉冲伏安法（DPV）评价电化学传感性能。优化的MEA与rGO的50:50 wt比显示出最有效的传感响应。优化后的MEA-rGO复合传感器在很宽的尿酸浓度范围（100-1000µM）内具有线性电流响应，灵敏度为27µa·µM⁻¹ ·cm⁻²。这些发现突出了MEA-rGO复合材料作为生物医学应用中坚固和敏感的电化学传感器的潜力。

引用次数: 0

Microstructure and mechanical properties of low-cost Nb521 alloy fabricated by hot isostatic pressing 热等静压制备低成本Nb521合金的组织与力学性能

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1016/j.nxmate.2026.101678

S.Y. Tang , N.B. Zhang , Z.Z. Cui , L.M. Chen , L.R. Xiao , X.J. Zhao , T.Q. Deng , Y.X. Jiang

Low-cost Nb521 alloy (Nb-5W-2Mo-1Zr) was fabricated by hot isostatic pressing (HIP) at four temperatures (1220°C, 1300°C, 1380°C, and 1460°C) using waste niobium alloys as raw materials. The specific source of waste niobium alloy is niobium alloy scraps produced by machining NbW5–2 alloy. Microstructure and mechanical properties of the low-cost Nb521 alloy were investigated. The results demonstrated that the matrix of Nb521 alloy is mainly composed of α-Nb, and a small number of precipitates such as ZrO and ZrO₂ can be observed. The bimodal grain size phenomenon was observed in the low-cost Nb521 alloy, which played a major role in the strengthening of the alloy. As the HIP temperature increased from 1220°C to 1460°C, the average grain size of low-cost Nb521 alloy coarsened from 5.1 μm to 9.6 μm. Low-grade prior particle boundaries (PPBs), enriched in Zr and O, were identified, which significantly reduces plasticity, leading to a brittle fracture mode. The room-temperature tensile strength and elongation of low-cost Nb521 alloy exceed 510 MPa and 15 %, respectively. The mechanical properties of low-cost Nb521 alloy reach the requirements of use, which means the purpose of recycling niobium resources has been successfully achieved.

以废铌合金为原料，在1220℃、1300℃、1380℃、1460℃4种温度下，采用热等静压（HIP）法制备了低成本Nb521合金（Nb-5W-2Mo-1Zr）。废铌合金的具体来源是加工NbW5-2合金产生的铌合金边角料。研究了低成本Nb521合金的显微组织和力学性能。结果表明：Nb521合金基体主要由α-Nb组成，并有少量ZrO、ZrO2等析出相；在低成本的Nb521合金中发现了双峰晶粒现象，这对合金的强化起主要作用。随着加热温度从1220℃升高到1460℃，低成本Nb521合金的平均晶粒尺寸从5.1 μm粗化到9.6 μm。发现了富含Zr和O的低品位先验颗粒边界（PPBs），这显著降低了塑性，导致脆性断裂模式。低成本Nb521合金的室温抗拉强度和延伸率分别超过510 MPa和15 %。低成本Nb521合金的力学性能达到了使用要求，成功实现了铌资源循环利用的目的。

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引用次数: 0

Synergistic approaches to alleviate issues of Li and S electrodes in solid-state polymer-based lithium-sulfur batteries 缓解固态聚合物基锂硫电池中Li和S电极问题的协同方法

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1016/j.nxmate.2026.101681

Mahshid Mohammadifar , Hongyi Gao , Jitti Kasemchainan

Lithium-sulfur batteries (LSBs) have garnered significant attention as a promising alternative to lithium-ion batteries, particularly for stationary energy storage applications, due to their high theoretical specific capacity of 1675 mAh.g⁻¹ and energy density of 2600 Wh.kg⁻¹ . However, the commercialization of LSBs is impeded by critical challenges, including rapid capacity fading, short cycle life, and low-rate capability, primarily attributed to the polysulfide shuttle effect and lithium dendrite growth. To overcome these obstacles, extensive research has been conducted on various strategies, such as the utilization of solid-state electrolytes to prevent polysulfide dissolution and dendrite formation, cathode modifications to enhance polysulfide retention and reaction kinetics, and the development of advanced separators to selectively block polysulfides. Despite these efforts, a comprehensive review focusing on the simultaneous mitigation of both the polysulfide shuttle effect and lithium dendrite growth within the framework of solid-state polymer-based electrolytes is notably absent. This review addresses this gap by providing a thorough analysis of the challenges in LSBs and presenting an integrated approach that combines advanced electrolyte and cathode materials. Specifically, we highlight the use of polyethylene oxide (PEO) electrolytes reinforced with biodegradable cellulose fillers, which demonstrate enhanced mechanical properties, effective dendrite suppression, and reduced polysulfide diffusion. Furthermore, we discuss emerging cathode designs that incorporate catalytic materials, Lewis acid-base sites and polar adsorbents to accelerate redox reactions and immobilize polysulfides. By integrating insights from recent studies, this work offers a comprehensive overview of the current advancements in LSB technology and identifies key research directions for achieving high-performance, safe, and sustainable lithium-sulfur batteries.

锂硫电池（lsb）由于其高达1675毫安时的理论比容量，作为锂离子电池的一种有前景的替代品，特别是在固定式储能应用中，已经引起了广泛的关注。g⁻¹ ，能量密度2600 Wh.kg⁻¹ 。然而，LSBs的商业化受到一些关键挑战的阻碍，包括容量衰减快、循环寿命短和低倍率能力，主要归因于多硫化物穿梭效应和锂枝晶生长。为了克服这些障碍，人们对各种策略进行了广泛的研究，例如利用固态电解质来防止多硫化物溶解和枝晶形成，阴极改性来增强多硫化物的保留和反应动力学，以及开发先进的分离器来选择性地阻挡多硫化物。尽管做出了这些努力，但在固态聚合物电解质的框架内，对同时缓解多硫化物穿梭效应和锂枝晶生长的全面审查显然是缺乏的。本综述通过对lsb面临的挑战进行全面分析，并提出一种结合先进电解质和阴极材料的综合方法，解决了这一差距。具体来说，我们强调使用可生物降解纤维素填料增强的聚氧化物（PEO）电解质，其具有增强的机械性能，有效抑制枝晶，减少多硫化物扩散。此外，我们讨论了新兴的阴极设计，包括催化材料，刘易斯酸碱位点和极性吸附剂，以加速氧化还原反应和固定多硫化物。通过整合最新研究的见解，本工作全面概述了LSB技术的当前进展，并确定了实现高性能、安全和可持续锂硫电池的关键研究方向。

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引用次数: 0

Progress in solid-vapor adsorption technology for eco-friendly refrigeration: Emphasizing metal halide sorbent 环保制冷固气吸附技术研究进展：以金属卤化物吸附剂为重点

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-02-04 DOI: 10.1016/j.nxmate.2026.101652

Duryodhan Sahu , Jagannath Panda , Amit Patnaik , Asish Kumar Mohapatra

The urgent global shift toward sustainable refrigeration technologies has spurred the development of solid-vapor adsorption refrigeration (SVAR) systems, as gained attention for their potential to replace conventional systems that rely on harmful CFCs. This review explores use of metal halide (MH) sorbents particularly compounds like calcium chloride and strontium chloride for eco-friendly refrigeration using ammonia as refrigerant. These materials show strong adsorption capabilities but face challenges such as structural swelling, agglomeration, and low thermal conductivity. To address these issues, recent research has focused on forming composite materials by implanting MHs into porous supports like activated carbon and silica gel, improving stability and heat transfer. The review also connects advances in material development with system-level strategies, including thermal management, innovative system designs, and renewable energy integration. Looking ahead, it highlights opportunities in next-generation materials like Metal Organic Frameworks (MOFs) for cooling systems. This work presents MH-based SVAR as a promising, scalable approach to energy-efficient refrigeration.

全球向可持续制冷技术的迫切转变刺激了固体蒸汽吸附制冷（SVAR）系统的发展，因为它们有可能取代依赖有害氯氟烃的传统系统而受到关注。本文综述了金属卤化物（MH）吸附剂的使用，特别是氯化钙和氯化锶等化合物在以氨为制冷剂的环保制冷中的应用。这些材料表现出很强的吸附能力，但面临结构性膨胀、团聚和低导热性等挑战。为了解决这些问题，最近的研究重点是通过将mh植入活性炭和硅胶等多孔支架中来形成复合材料，以提高稳定性和传热能力。该综述还将材料开发的进展与系统级战略联系起来，包括热管理、创新系统设计和可再生能源集成。展望未来，它强调了下一代材料的机会，如用于冷却系统的金属有机框架（mof）。这项工作提出了基于mh的SVAR作为一种有前途的，可扩展的节能制冷方法。

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引用次数: 0

Numerical investigation on the laser impact welding process with dissimilar metallic joints 异种金属接头激光冲击焊接过程的数值研究

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.nxmate.2026.101677

Van-Thuc Nguyen , Vo Thi Thu Nhu , Xuan-Tien Vo , Tran Ngoc Thien

This report examines the laser impact welding (LIW) process of Ni-Al dissimilar metals, focusing on the formation mechanism of the joining via molecular dynamics (MD) simulation. The effects of impact depth, impact angle, and impact speed are examined. The results indicate that increasing the impact speed leads to better bonding quality, higher strain, stress, and structure transformation levels. At 1000 m/s to 2000 m/s, there are ejecting atoms that accumulate to form a cloud of particles and then become visible emission or jetting. The temperature evolution shows that some zone has a high temperature, leading to the local fusion welding state and facilitate the jetting effects. The displacement vector reveals the twisting atoms or vortex formation at the interface. The quality of the welding is significantly impacted by altering the impact angle. The atoms are well-intruded when impacting at 5°10°, which leads to good interface bonding. To improve findings, additional research should be undertaken using different simulation methods or experiments in the future.

本文研究了Ni-Al异种金属的激光冲击焊接过程，并通过分子动力学（MD）模拟研究了焊接过程的形成机理。考察了冲击深度、冲击角度和冲击速度对冲击效果的影响。结果表明，随着冲击速度的增加，合金的结合质量提高，应变、应力和组织转变水平提高。在1000 米/秒到2000 米/秒之间，有喷射的原子聚集形成粒子云，然后变成可见的发射或喷射。温度演化表明，部分区域温度较高，导致局部熔焊状态，有利于喷射效果。位移矢量揭示了界面处的扭曲原子或涡旋的形成。冲击角的改变对焊接质量有显著影响。在5°10°碰撞时，原子被很好地侵入，形成了良好的界面键合。为了改进研究结果，未来应使用不同的模拟方法或实验进行进一步的研究。

引用次数: 0

Development of natural fiber-epoxy and vinyl ester biocomposites for sustainable fabrication of hydrokinetic turbines 用于水力涡轮机可持续制造的天然纤维环氧树脂和乙烯基酯生物复合材料的开发

Next Materials

Pub Date : 2026-04-01 Epub Date: 2026-01-29 DOI: 10.1016/j.nxmate.2026.101651

Juan C. Lopez-Mercado , Daniela Mahecha-Rivas , Juan P. Correa-Aguirre , Juan P. Casas-Rodriguez , Miguel A. Hidalgo-Salazar

Energy access fundamentally drives community development. Powering essential services and infrastructure, reliable electricity facilitates social, economic, health, and educational progress. This study investigates the fabrication and characterization of epoxy (EP) and vinyl ester (VE)-natural fibers biocomposites for use in sustainable energy systems. The novelty of this research is based on an integrated approach that combines the characterization of biocomposites from fique and coir fibers with their application in the production of a functional vertical axis hydrokinetic turbine (VAHT) prototype. Characterization included tensile tests complemented by Digital Image Correlation (DIC) and Izod impact testing. The thermal properties were studied using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM) was utilized to examine the adhesion and dispersion of fibers within the matrix. Viscoelastic properties were assessed using Dynamic Mechanical Analysis (DMA). Non-woven composites displayed a substantial stiffening effect, with improvements in tensile modulus reaching up to 33 % over neat resin. Non-woven fique fiber biocomposites showed the highest impact energy absorption (4.5 J), whereas EP-woven fique fiber specimens demonstrated superior tensile strength (35 MPa). Thermal degradation onset for VE-NWFF was observed at 397 ° Celsius. The results of the ANOVA test showed that fiber and fabric type have statistically significant impacts on mechanical performance (p ≤ 0.05). Research findings indicate that developed biocomposites can meet the necessary performance standards for hydrokinetic turbines production, providing a sustainable and cost-efficient alternative for distributed power networks in isolated areas.

能源获取从根本上推动社区发展。可靠的电力为基本服务和基础设施提供动力，促进社会、经济、卫生和教育进步。本研究探讨了用于可持续能源系统的环氧树脂（EP）和乙烯基酯(VE)-天然纤维生物复合材料的制备和表征。这项研究的新颖性是基于一种综合方法，该方法将纤维和椰子纤维的生物复合材料的特性与它们在功能性垂直轴水动力涡轮机（VAHT）原型生产中的应用相结合。表征包括拉伸试验，辅以数字图像相关（DIC）和Izod冲击试验。利用差示扫描量热法（DSC）和热重分析法（TGA）研究了其热性能，并利用扫描电镜（SEM）研究了纤维在基体中的粘附和分散。粘弹性性能采用动态力学分析（DMA）进行评估。无纺布复合材料表现出明显的加筋效果，与纯树脂相比，拉伸模量提高了33 %。无纺布纤维生物复合材料具有最高的冲击能量吸收（4.5 J），而ep编织纤维生物复合材料具有更高的抗拉强度（35 MPa）。VE-NWFF的热降解开始于397℃。方差分析结果表明，纤维和织物类型对机械性能的影响有统计学意义（p ≤ 0.05）。研究结果表明，开发的生物复合材料可以满足水动力涡轮机生产所需的性能标准，为偏远地区的分布式电网提供可持续和经济的替代方案。

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引用次数: 0