【新文速递】2024年12月25日复合材料SCI期刊最新文章

今日更新：Composite Structures 1 篇，Composites Part A: Applied Science and Manufacturing 3 篇，Composites Part B: Engineering 1 篇Composite StructuresVibration analysis and optimal design of multiscale hybrid flax Fiber/Graphene nanoplatelets reinforced laminates using Modified Differential Evolution algorithmOzan Ayakdaş, H. Seçil Artem, Melih Savran, Levent Aydin, Sarp Adalidoi:10.1016/j.compstruct.2024.118804基于改进差分进化算法的亚麻纤维/石墨烯纳米片复合材料振动分析及优化设计One of the relatively recent developments in composites is using different material combinations and nano-scale reinforcements such as Graphene Nanoplatelets (GNPs) to develop hybrid fiber composites. A further development is the use of natural fibers such as flax in composites in response to a growing demand over the past few decades for affordable, lightweight, and environmentally-friendly materials. In order to meet this growing demand, in the present study composites based on graphene nanoplatelets and flax fibers are investigated considering their weight, cost, and natural frequency implications. Furthermore, the Differential Evolution (DE) algorithm is implemented for the optimum design problems involving the stacking sequences and weight fractions of GPLs in each layer. For the optimal design problems, natural frequency is defined as the objective function with the design variables specified as the orientations of flax fibers and the weight contents of GPLs in each layer. The effective material properties are computed based on Halpin-Tsai and the rule of mixture formulations. Navier solution approach is implemented to solve the eigenvalue problems with the stiffness matrix based on the First-order Shear Deformation Theory (FSDT). Optimal designs based on flax fibers, optimal GPL contents, and stacking sequences lead to efficient and environmentally-friendly composite plates. Optimum Plate designs include high natural frequency, light weight, and cost-effectiveness compared to conventional carbon fiber reinforced equivalents.复合材料的最新发展之一是使用不同的材料组合和纳米级增强材料，如石墨烯纳米片（GNPs）来开发混合纤维复合材料。进一步的发展是在复合材料中使用天然纤维，如亚麻，以响应过去几十年对经济、轻质和环保材料不断增长的需求。为了满足这一日益增长的需求，在目前的研究中，考虑到它们的重量、成本和固有频率影响，研究了基于石墨烯纳米片和亚麻纤维的复合材料。在此基础上，采用差分进化（DE）算法对各层gpl的叠加顺序和权重进行优化设计。对于优化设计问题，将固有频率定义为目标函数，设计变量为亚麻纤维的取向和每层gpl的重量含量。基于Halpin-Tsai和混合配方规则计算了有效材料的性能。基于一阶剪切变形理论（FSDT），采用Navier解法求解刚度矩阵的特征值问题。基于亚麻纤维的优化设计，最佳GPL含量和堆叠顺序导致高效和环保的复合板。最佳板设计包括高固有频率，重量轻，与传统的碳纤维增强等效物相比，成本效益高。Composites Part A: Applied Science and ManufacturingGlass-blowing-inspired constructing a novel ceramizable intumescent flame retardant for realizing superior flame retardancy, smoke suppression and water resistance of polyethylene compositesRuiping Wang, Shuo Zhang, Shuai Du, Miaojun Xu, Zhiliang Wang, Pingan Song, Xin Zhao, Bin Lidoi:10.1016/j.compositesa.2024.108687 以玻璃吹制为灵感构建一种新型的可陶化膨胀阻燃剂，实现聚乙烯复合材料优异的阻燃性、抑烟性和耐水性The development of linear low density polyethylene (LLDPE) composites with high flame retardancy, low smoke release and water resistance is of great significance to expand their application fields. Herein, inspired by glass-blowing, a synergy strategy is proposed to prepare a novel ceramizable intumescent flame retardant (C-IFR) by piperazine pyrophosphate, melamine pyrophosphate and polycarbosilane (PCS). Because the blowing expansion effect of C-IFR facilitates the formation of a high-quality ceramization char layer with high expansion rate during combustion, the LLDPE/C-IFR3 achieved UL-94 V-0 rating during vertical burning tests with a limiting oxygen index (LOI) of 31.8 % at only 21 wt% addition. Its peak heat release rate and peak smoke production rate were 79.7 % and 75.0 % lower than LLDPE, respectively. Meanwhile, LLDPE/C-IFR3 exhibited good water resistance due to the surface migration effect of hydrophobic PCS. The LLDPE composite still passed UL-94 V-0 rating with a LOI of 30.1 % after 168 h water treatment, which is slightly lower than that of before water treatment. This work provides an optional way to prepare high efficiency and long-lasting flame retardant LLDPE composites with good water resistance, which is expected to break through the limitations of its application in many fields.开发具有高阻燃性、低放烟性和耐水性的线性低密度聚乙烯（LLDPE）复合材料对拓展其应用领域具有重要意义。本文以玻璃吹制为灵感，提出了一种协同策略，以焦磷酸哌嗪、焦磷酸三聚氰胺和聚碳硅烷（PCS）为原料制备新型可陶化膨胀阻燃剂（C-IFR）。由于C-IFR的吹胀效应有助于在燃烧过程中形成具有高膨胀率的高质量陶化炭层，LLDPE/C-IFR3在垂直燃烧试验中达到UL-94 V-0等级，极限氧指数（LOI）为31.8% %，添加量仅为21 wt%。其峰值放热率和峰值产烟率分别比LLDPE低79.7% %和75.0% %。同时，由于疏水性PCS的表面迁移效应，LLDPE/C-IFR3具有良好的耐水性。经168 h水处理后，LLDPE复合材料仍通过UL-94 V-0等级，LOI为30.1 %，略低于水处理前。本工作为制备具有良好耐水性的高效长效阻燃LLDPE复合材料提供了可选途径，有望突破其在诸多领域应用的局限性。Thermal-oxidative aging mechanism of carbon fiber reinforced self-catalytic phthalonitrile resin matrix composite laminates at 450 ℃ ∼ 500 ℃Zongqi Yang, Yizhuo Gu, Yuwei Liu, Maoyuan Li, Shaokai Wang, Min Lidoi:10.1016/j.compositesa.2024.108689碳纤维增强自催化邻苯二腈树脂基复合材料层合板450℃~ 500℃热氧化老化机理研究For advancing heat-resistant of carbon fiber reinforced phthalonitrile composites as load-bearing materials, a kind of self-catalytic phthalonitrile resin serving at 450 ℃ ∼ 500 ℃ has been developed and was used to fabricate carbon fiber reinforced phthalonitrile composite laminates. Combined with pyrolysis kinetic equation, mass loss rate and micromechanical behaviors, this paper systematically investigated thermal-oxidative aging mechanism of composite laminates at 450 ℃ and 500 ℃ from three components: phthalonitrile resin, carbon fiber and interface. The pyrolysis mechanism of phthalonitrile resin was explored by a combination of thermogravimetric analysis and pyrolysis–gas chromatography-mass spectrometry. The results illustrate that phthalonitrile resin possesses good thermal stability with the formation of aromatic heterocyclic structures. The pyrolysis kinetic model of phthalonitrile resin at 450 ℃ ∼ 500 ℃ is attributed to two-dimensional diffusion mechanism. The thermal-oxidative aging behavior of composite laminate strongly depends on pyrolysis of phthalonitrile resin and the degradation of interface. Compared with the properties of composite laminate at room temperature, high retention rates of flexural property and interlaminar shear strength under elevated temperatures are obtained after 450 and 500 °C thermal-oxidative aging. It suggests the great potential of phthalonitrile composites to be used as light-weight load-bearing materials serving at 450 °C ∼ 500 °C.为提高碳纤维增强邻苯二腈复合材料作为承载材料的耐热性，研制了一种450℃~ 500℃自催化邻苯二腈树脂，并将其用于碳纤维增强邻苯二腈复合材料层压板的制备。结合热解动力学方程、质量损失率和微观力学行为，系统研究了由邻苯二腈树脂、碳纤维和界面三组分组成的复合层压板在450℃和500℃下的热氧化老化机理。采用热重分析和热解-气相色谱-质谱联用技术对邻苯二腈树脂的热解机理进行了探讨。结果表明，邻苯二腈树脂具有良好的热稳定性，可形成芳香族杂环结构。邻苯二腈树脂在450℃~ 500℃的热解动力学模型属于二维扩散机制。复合层压板的热氧化老化行为在很大程度上取决于邻苯二腈树脂的热解和界面的降解。与室温下的复合层压板性能相比，450℃和500 ℃热氧化老化后，复合层压板在高温下的弯曲性能和层间剪切强度保持率较高。这表明邻苯二腈复合材料在450 °C ~ 500 °C下作为轻质承重材料的巨大潜力。Constructing short carbon fiber/carbon nanotubes multiscale reinforcement by a non-destructive rare-earth modification method for improving the thermal, mechanical, and tribological properties of epoxy-based compositesWei Li, Zhinan Zhangdoi:10.1016/j.compositesa.2024.108690采用非破坏性稀土改性法构建短碳纤维/碳纳米管多尺度增强材料，改善环氧基复合材料的热、力学和摩擦学性能In order to improve the thermal, mechanical, and tribological properties of epoxy-based (EP) composites, short carbon fiber/carbon nanotubes (CF/CNTs) multiscale reinforcement was constructed by a non-destructive rare-earth modification method. The results of SEM, AFM, FTIR, XPS, and Raman of CF/CNTs multiscale reinforcement showed that this method successfully achieved high-density grafting of CNTs on the CF surface through coordination bonding without damaging its surface structure, which increased the surface roughness of CF from 18.43 nm to 61.31 nm. The results of XRD, TGA, tensile, and reciprocating sliding tribological experiments showed that CF/CNTs multiscale reinforcement has excellent effects on enhancing the range of short-range order structure, thermal, mechanical, and tribological properties of the EP matrix. In summary, this novel chemical grafting method for constructing CF/CNTs multiscale reinforcement offers several advantages, including non-destructiveness, easy operationality, low cost, and environmental friendliness.为了提高环氧基（EP）复合材料的热、力学和摩擦学性能，采用非破坏性稀土改性方法构建了短碳纤维/碳纳米管（CF/CNTs）多尺度增强材料。CF/CNTs多尺度增强的SEM、AFM、FTIR、XPS和Raman结果表明，该方法在不破坏CF表面结构的情况下，通过配位键成功实现了CNTs在CF表面的高密度接枝，使CF的表面粗糙度从18.43 nm提高到61.31 nm。XRD、TGA、拉伸和往复滑动摩擦学实验结果表明，CF/CNTs多尺度增强对EP基体的近程有序结构范围、热性能、力学性能和摩擦学性能都有很好的增强效果。总之，这种构建CF/CNTs多尺度增强材料的新型化学接枝方法具有无损、易于操作、成本低和环境友好等优点。Composites Part B: EngineeringCombining Molten Glass with High-Melting-Point Ceramics for Ultra-High Temperature Protection in SensorsXiong Zhou, Xianwei Qian, Muhan Wu, Yong Huang, Chenbu Zhou, Lantian Tang, Lida Xu, Lingyun Wang, Chao Wudoi:10.1016/j.compositesb.2024.112102 熔融玻璃与高熔点陶瓷相结合用于传感器的超高温保护Inhibiting sublimation, oxidation, and loss of film material at high temperature above 1000 °C is a key challenge for ultra-high temperature thin-film sensor applications. Lava flows in the mantle are often encapsulated by harder mineral layers. This alternating structure of soft and hard materials inspired us to design a novel sandwich protective layer for thin-film sensors. The middle layer of this design uses a glassy material capable of self-healing microcracks and damage through melting, filling and covering in high-temperature environments. The top and bottom layers, made of high-temperature resistant ceramic, provide essential structural support and thermal stability. Based on the above configuration, four key challenges associated with high-temperature In2O3-based sensors using resistance-type mechanisms have been addressed: instability above 1100 °C, inconsistent resistance across varying temperatures, non-monotonic resistance-temperature behavior, and sensitivity to environmental atmospheres. The printed-in-place In2O3/SiCNO thermistor demonstrates stable operation at temperatures up to 1300 °C with a resistance drift rate as low as 0.18%/h, making it the best-reported In2O3-based thin-film sensor in terms of operating temperature and high-temperature resistance stability. Demonstrations on high-temperature components have also shown more precise in-situ temperature measurements compared to traditional thermocouples.在1000°C以上的高温下抑制薄膜材料的升华、氧化和损耗是超高温薄膜传感器应用的关键挑战。地幔中的熔岩流通常被较硬的矿物层包裹。这种软硬材料的交替结构启发我们设计了一种新型的薄膜传感器夹层保护层。该设计的中间层使用了一种玻璃材料，能够在高温环境中通过熔化、填充和覆盖自愈微裂缝和损伤。顶部和底部由耐高温陶瓷制成，提供必要的结构支撑和热稳定性。基于上述配置，采用电阻型机制的高温in2o3传感器的四个关键挑战已经得到解决：1100°C以上的不稳定性，不同温度下的不一致电阻，非单调电阻-温度行为以及对环境气氛的敏感性。原位印刷的In2O3/SiCNO热敏电阻在高达1300°C的温度下稳定工作，电阻漂移率低至0.18%/h，使其成为在工作温度和高温电阻稳定性方面报道最好的In2O3薄膜传感器。与传统热电偶相比，高温组件的演示也显示出更精确的原位温度测量。来源：复合材料力学仿真Composites FEM