Composites Science and Technology最新文献_第9页

Biomimetic all-fiber hierarchical multiscale composite aerogels for multifunctional thermal, acoustic, and oil absorption applications 仿生全纤维分层多尺度复合气凝胶，用于多功能热、声学和吸油应用

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-08 DOI: 10.1016/j.compscitech.2025.111445

Yanyan Wang , Xiaoqing Yin , Nan Pang , Xiaomin Yuan , Quan Han , Meijie Yu , Chengguo Wang , Chuanjian Zhou

As modern industry develops, the demand for multifunctional and structurally robust organic composite aerogels has grown, but conventional counterparts remain mechanically fragile and functionally limited. Inspired by the hierarchical multiscale structure of bird nests, this work proposes a structurally stable and multifunctional all-fiber multiscale composite aerogel (MCA) design strategy. By tuning the dissociation degree of aramid fibers (AF), multiscale aramid fibers (MAF) with an ultrabroad diameter distribution were innovatively obtained and co-assembled with electrospun polyimide nanofibers (PINF) into a nest-like composite network with fiber diameters spanning nanometers to micrometers. The self-assembly of aramid nanofibers (ANF) and the interweaving of multiscale fibers significantly enhance mechanical robustness, achieving synergistic improvements in compression, flexibility, and stretchability. The open hierarchical porous structure enabled low thermal conductivity (28.3–32.6 mW m⁻¹ K⁻¹), broad-frequency high-efficiency sound absorption (coefficient > 0.9 from 1920 to 6400 Hz), and exceptional oil absorption (over 107 times its weight), outperforming most reported aerogels. Moreover, the MCA remains stable from −196 to 500 °C and enables tunable infrared camouflage through low-emissivity coatings. The MCA developed in this work combines excellent mechanical performance with multifunctionality, providing a structurally stable, facile, and high-performance design approach for advanced aerogels.

随着现代工业的发展，对多功能和结构坚固的有机复合气凝胶的需求不断增长，但传统的气凝胶仍然是机械脆弱和功能有限的。受燕窝分层多尺度结构的启发，本文提出了一种结构稳定、多功能的全纤维多尺度复合气凝胶（MCA）设计策略。通过调整芳纶纤维（AF）的解离度，创新地获得了具有超宽直径分布的多尺度芳纶纤维（MAF），并与静电纺聚酰亚胺纳米纤维（PINF）共组装成纤维直径跨越纳米至微米的巢状复合网络。芳纶纳米纤维（ANF）的自组装和多尺度纤维的交织显著增强了机械稳健性，实现了压缩、柔韧性和拉伸性的协同改善。开放的分层多孔结构具有低导热系数（28.3-32.6 mW m−1 K−1），高频高效吸声（系数>； 0.9，从1920到6400 Hz）和出色的吸油性（超过其重量的107倍），优于大多数报道的气凝胶。此外，MCA在- 196至500°C范围内保持稳定，并通过低发射率涂层实现可调红外伪装。在这项工作中开发的MCA结合了优异的机械性能和多功能，为先进的气凝胶提供了结构稳定、方便和高性能的设计方法。

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引用次数: 0

Process–structure–property relation for elastoplastic behavior of polymer nanocomposites with agglomerates and interfacial gradients 具有团聚体和界面梯度的聚合物纳米复合材料弹塑性行为的工艺-结构-性能关系

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-06 DOI: 10.1016/j.compscitech.2025.111435

Prajakta Prabhune , Anlan Chen , Yigitcan Comlek , Wei Chen , L. Catherine Brinson

Polymer nanocomposites, inherently tailorable materials, are potentially capable of providing higher strength to weight ratio than conventional hard metals. However, their disordered nature makes processing control and hence tailoring properties to desired target values a challenge. Additionally, the interfacial region, also called the interphase, is a critical material phase in these heterogeneous materials and its extent depends on variety of microstructure features like particle loading and dispersion or inter-particle distances. Understanding process–structure–property (PSP) relation can provide guidelines for process and constituents’ design. Our work explores nuances of PSP relation for polymer nanocomposites with attractive pairing between particles and the bulk polymer. Past works have shown that particle functionalization can help tweak these interactions in attractive or repulsive type and can cause slow or fast decay of stiffness properties in polymer nanocomposites. In this work, we develop a material model that can represent decay for small strain elastoplastic (Young’s modulus and yield strength) properties in interfacial regions and simulate representative or statistical volume element behavior. The interfacial elastoplastic material model is devised by combining local stiffness and glass transition measurements from atomic force microscopy and fluorescence microscopy. This model is combined with a microstructural design of experiments for agglomerated nanocomposite systems. Agglomerations are particle aggregations arising from processing artifacts. Twin screw extrusion process can reduce extent of aggregation in hot pressed samples via erosion or rupture depending on screw rpms and torque. We connect this process–structure relation to structure–property relation that emerges from our study. We discover that balancing between local stress concentration zones (SCZ) and interfacial property decay governs how fast yield stress can improve by breaking down agglomeration via erosion. Erosion is relatively more effective in helping improve nanocomposite yield strength. We also observe saturation in properties where incremental increase brought on by erosion is slowed due to increasing SCZ and saturation in interphase percolation.

聚合物纳米复合材料是一种固有的可定制材料，具有比传统硬金属提供更高强度重量比的潜力。然而，它们的无序性使得处理控制和裁剪属性到期望的目标值成为一项挑战。此外，界面区域，也称为界面相，是这些非均质材料中的关键材料相，其程度取决于各种微观结构特征，如颗粒负载和分散或颗粒间距离。理解工艺-结构-性能（PSP）关系可以为工艺和部件的设计提供指导。我们的工作探讨了聚合物纳米复合材料的PSP关系的细微差别，粒子和体聚合物之间有吸引力的配对。过去的研究表明，粒子功能化可以帮助将这些相互作用调整为吸引或排斥类型，并可能导致聚合物纳米复合材料的刚度性能缓慢或快速衰减。在这项工作中，我们开发了一个材料模型，可以表示界面区域的小应变弹塑性（杨氏模量和屈服强度）特性的衰减，并模拟代表性或统计体积元行为。结合原子力显微镜和荧光显微镜的局部刚度和玻璃化转变测量，设计了界面弹塑性材料模型。该模型结合了团聚纳米复合材料体系的微观结构实验设计。聚集是由加工工件产生的粒子聚集。双螺杆挤压工艺可以减少热压样品中因螺杆转速和扭矩不同而产生的侵蚀或破裂的聚集程度。我们将这种过程-结构关系与我们研究中出现的结构-性质关系联系起来。我们发现，局部应力集中区（SCZ）和界面性能衰减之间的平衡决定了通过侵蚀破坏团聚体来提高屈服应力的速度。在提高纳米复合材料屈服强度方面，侵蚀作用相对更有效。我们还观察到，由于侵蚀带来的增量增加由于增加的SCZ和相间渗透的饱和度而减慢了性质的饱和。

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引用次数: 0

Janus particles stabilized waterborne epoxy coatings for switchable electromagnetic manipulation 用于可切换电磁操作的Janus颗粒稳定水性环氧涂料

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-07 DOI: 10.1016/j.compscitech.2025.111443

Chao Jiang , Pei-Zhu Jiang , Hao-Bin Zhang , Xiaoqing Liu , Fuxin Liang

Modern electronic communication requires ideal electromagnetic manipulation materials urgently to guarantee the high quality of communication and the stable function of electronic devices. Thin epoxy-based composite coatings are potential candidates that are still limited by the efficiency and convenience of building functional filler networks inside. Sustainable development also calls for new techniques to prepare the waterborne epoxy coatings, especially those with multiple functions. Here, an efficient and general method was developed to fabricate multifunctional waterborne epoxy coatings based on the amphiphilic Janus particles (JPs) stabilized Pickering emulsion. JPs were used to stabilize the oil-in-water epoxy emulsions and were anchored at the interface. Thereafter, JPs remained at the interface and resulted in a characteristic bilayer JPs network. This JP's network acts as the platform for functions or assistance to build a conductive MXene nanosheet network. The conductive network is in the morphology of a coverage-adjustable cage by varying the content of fillers. Electromagnetic manipulation performance of the coatings is thus switchable between wave absorbing and interference shielding as the conductive network shifts between a defective-cage and a closed-cage structure. The minimum reflection loss at 1.8 mm reached −25 dB in the absorbing on state and the total electromagnetic interference shielding effectiveness reached 23 dB in the shielding on state.

现代电子通信迫切需要理想的电磁操纵材料，以保证高质量的通信和电子设备的稳定功能。薄环氧基复合涂料是潜在的候选者，但仍然受到内部构建功能性填料网络的效率和便利性的限制。可持续发展对水性环氧涂料特别是多功能水性环氧涂料的制备提出了新的要求。本文研究了一种基于两亲性Janus颗粒（JPs）稳定皮克林乳液制备多功能水性环氧涂料的方法。JPs用于稳定水包油环氧乳液，并锚定在界面处。此后，jp一直停留在界面上，形成了具有特征的双层jp网络。该JP的网络作为功能平台或辅助平台来构建导电的MXene纳米片网络。通过改变填充物的含量，导电网络呈覆盖可调笼状。因此，当导电网络在缺陷笼和封闭笼结构之间转换时，涂层的电磁操纵性能可以在吸波和屏蔽干扰之间切换。在吸收导通状态下，1.8 mm处的最小反射损耗达到−25 dB，在屏蔽导通状态下，总电磁干扰屏蔽效能达到23 dB。

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引用次数: 0

Achieving high temperature energy storage performance in PVDF through synergizing cross-linking and BNNs doping strategies 通过协同交联和bnn掺杂策略实现PVDF的高温储能性能

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-17 DOI: 10.1016/j.compscitech.2025.111455

Qiuying Zhao , Jiachen Shi , Lu Yang , Ming Zhang , Hongli Ji , Jinhao Qiu

The growing demand for electrostatic capacitors in extreme conditions highlights the urgent need for polymer dielectric films with high breakdown strength (E_b), high discharge energy density (U_e), and outstanding high-temperature stability. Herein, a high-temperature stable capacitive composite film based on poly(vinylidene fluoride-co-chlorotrifluoroethylene) (P(VDF-CTFE)) is proposed by synergizing cross-linking and doping strategies. Specifically, P(VDF-CTFE) is engineered to form a cross-linking network and subsequently doped with surface-modified BNNs (BNNs-OH). By harnessing the synergistic effect between cross-linking and BNNs-OH doping, one can effectively restrict molecular mobility, disrupt the growth of crystalline domains, and inhibit the propagation of electrical trees and defects. This dual modification not only enhances the structural integrity of the polymer matrix but also improves its breakdown strength, high-temperature stability, and energy storage capabilities. The resultant composite film delivers a high discharge energy density up to 14.1 Jcm⁻³ at 25 °C and 13.59 Jcm⁻³ at 150 °C, validating its distinguished temperature stability over a wide temperature range. This study presents a facile strategy to develop advanced polymer dielectric films for harsh operating environments where both performance and durability are crucial.

在极端条件下对静电电容器的需求日益增长，迫切需要具有高击穿强度（Eb）、高放电能量密度（Ue）和出色的高温稳定性的聚合物介电膜。本文采用交联和掺杂的协同策略，制备了一种基于聚偏氟乙烯-共氯三氟乙烯（P(VDF-CTFE)）的高温稳定电容性复合薄膜。具体来说，P（VDF-CTFE）被设计成形成交联网络，随后掺杂表面修饰的BNNs （BNNs- oh）。通过利用交联和BNNs-OH掺杂之间的协同效应，可以有效地限制分子迁移率，破坏晶体结构域的生长，抑制电树和缺陷的传播。这种双重改性不仅增强了聚合物基体的结构完整性，而且提高了其击穿强度、高温稳定性和储能能力。合成的复合薄膜在25°C和150°C下的放电能量密度分别高达14.1 Jcm−3和13.59 Jcm−3，证明了其在宽温度范围内的优异温度稳定性。这项研究提出了一种简单的策略来开发先进的聚合物介电薄膜，用于性能和耐用性都至关重要的恶劣操作环境。

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引用次数: 0

Bioinspired Hoya carnosa-structured Al2O3/Soybean oil epoxy nanocomposites for high performance thermal interface materials 高性能热界面材料的仿生山芋结构Al2O3/大豆油环氧纳米复合材料

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-25 DOI: 10.1016/j.compscitech.2025.111462

Maoping Lyu , Hebo Shi , Qian Zhang , Yingchun Liu , Hui Zhang

Developing thermally conductive and dielectric polymeric composites is one of the critical drivers in upgrading integrated electronic devices. Herein, polydopamine and silver nanoparticles functionalized Al₂O₃ (f-Al₂O₃) with a bionic “Hoya carnosa flower” structure were prepared, and bifunctional nanocomposites were fabricated by using the f-Al₂O₃ and soybean oil-based epoxy with a solvent-free method. Morphology and microstructure analyses of the nanocomposites suggested that not only the dispersion of fillers was promoted, but also the fillers/matrix interface compatibility was optimized significantly. In addition to the role as the “bridge” for enhancing thermal conduction and reducing interfacial thermal resistance, silver nanoparticles also inhibit electron migration and suppress the interfacial space charge accumulation. As-prepared nanocomposites thus exhibited a high TC of 0.73 W m⁻¹ K⁻¹, superior dielectric properties (dielectric constant and dielectric loss are ∼3.9 and 0.03, respectively), and outstanding tensile strength (8.45 ± 0.63 MPa) and elongation at break (∼40 %). Furthermore, interfacial adhesion experiments and theoretical simulation results demonstrated that as-prepared nanocomposites presented great potential in advanced thermal interface packaging. This work offers a versatile approach and provides a new paradigm for the design and fabrication of thermally conductive and dielectric polymer composites derived from vegetable oils.

开发导热和介电聚合物复合材料是集成电子器件升级的关键驱动因素之一。在此基础上，制备了聚多巴胺和纳米银纳米粒子功能化Al2O3 (f-Al2O3)，并将f-Al2O3与大豆油基环氧树脂采用无溶剂法制备了双功能纳米复合材料。对纳米复合材料的形貌和微观结构分析表明，复合材料不仅促进了填料的分散，而且显著优化了填料/基体界面相容性。除了起到增强热传导、降低界面热阻的“桥梁”作用外，银纳米颗粒还能抑制电子迁移，抑制界面空间电荷积累。因此，制备的纳米复合材料具有0.73 W m−1 K−1的高TC，优越的介电性能（介电常数和介电损耗分别为~ 3.9和0.03），以及出色的抗拉强度（8.45±0.63 MPa）和断裂伸长率（~ 40%）。此外，界面粘附实验和理论模拟结果表明，所制备的纳米复合材料在先进的热界面封装中具有很大的潜力。这项工作提供了一个通用的方法，并为设计和制造来自植物油的导热和介电聚合物复合材料提供了一个新的范例。

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引用次数: 0

A micromechanics-based numerical study on the viscoelastic damping in carbon nanotube/polymer nanocomposites 基于微力学的碳纳米管/聚合物纳米复合材料粘弹性阻尼数值研究

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-11 DOI: 10.1016/j.compscitech.2025.111449

Kasra Abedi , Hasan Seraj , Reza Ansari , Mohammad Kazem Hassanzadeh-Aghdam , Jamaloddin Jamali , Saeid Sahmani

The viscoelastic damping behavior of carbon nanotube (CNT)/polymer nanocomposites is investigated using a 3D numerical micromechanical model based on the finite element method (FEM) and a complex modulus approach. This model uniquely considers the collective behavior and interactions of multiple, randomly or directionally aligned CNTs within a representative volume element (RVE). To account for the frictional energy dissipation at the interface, a thin, weakened, and lossy interphase is simulated around the CNTs. The computational framework is validated by comparing its predictions for the elastic, viscoelastic creep, and damping properties with existing experimental data. Furthermore, the model is used to perform a sensitivity analysis, exploring the influence of key nanostructural parameters on the effective loss factor of the nanocomposite. The results show that the effective loss factor is significantly enhanced by increasing the CNT volume fraction, a finding directly linked to the greater presence of the lossy interphase. Damping also increases with a thicker interphase and a higher relative loss factor of the interphase. The CNT aspect ratio is shown to have a notable effect, influencing the maximum damping achievable at a specific volume fraction. Finally, for aligned nanofillers, the study reveals a strong dependency of the directional loss factors on the CNT off-axis angle.

采用基于有限元法和复模量法的三维数值细观力学模型，研究了碳纳米管/聚合物纳米复合材料的粘弹性阻尼行为。该模型独特地考虑了代表性体积单元（RVE）内多个随机或定向排列的碳纳米管的集体行为和相互作用。为了考虑界面处的摩擦能量耗散，在CNTs周围模拟了一个薄的、减弱的、有损的界面相。通过将其对弹性、粘弹性蠕变和阻尼特性的预测与现有实验数据进行比较，验证了计算框架的有效性。此外，利用该模型进行了灵敏度分析，探讨了关键纳米结构参数对纳米复合材料有效损耗因子的影响。结果表明，通过增加碳纳米管体积分数，有效损耗因子显着增强，这一发现与损耗间相的存在直接相关。阻尼也随着间相厚度的增加和间相相对损耗因子的增加而增加。碳纳米管长径比具有显著的影响，影响在特定体积分数下可实现的最大阻尼。最后，对于定向纳米填料，研究揭示了碳纳米管离轴角对定向损失因子的强烈依赖性。

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引用次数: 0

Recoverable, impact-resistant composites by encapsulating shear-stiffening gel into 3D-printed superelastic silicone rubber skeletons via in-situ polymerization 通过原位聚合将剪切硬化凝胶封装到3d打印的超弹性硅橡胶骨架中，制成可回收的抗冲击复合材料

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-28 DOI: 10.1016/j.compscitech.2025.111467

Xingwei Feng , Jie Wang , Yongqian Chen , Jinpeng Wen , Tao Xing , Hong Shao , Yangguang Xu , Jian Li , Xicheng Huang , Changyu Tang

This study reports a compressive deformation-recoverable and high impact-resistant flexible composite fabricated by encapsulating shear-stiffening polyborosiloxane (PBS) gel into 3D-printed superelastic silicone rubber (SE) skeletons through in-situ polymerization approach, addressing critical limitations of conventional PBS, such as cold-flow and poor resilience. The approach achieves a homogeneous and high filling of PBS in the composites without leakage. Synergistic interactions between the resilient SE skeleton and strain-rate-sensitive PBS enable exceptional energy dissipation efficiency (83.6 %) and high recoverability (96.7 %) at low strain rate due to the synergistic effect of SE skeleton and PBS. The composite demonstrates superior impact-resistance, reducing peak forces by 69.1–80.6 % under high-energy impacts and exhibiting strain-rate-dependent energy absorption enhancement (79-fold increase at 5153 s⁻¹), outperforming commercial materials like EVA foam. Besides, the composite retains structural integrity after high-speed impacts due to PBS's self-healing capability via cold-flow behavior. Our approach provides a way for designing a composite with good elastic recovery, high impact resistance, and reusable energy dissipation properties for applications in wearable systems, precision equipment, and advanced armor.

本研究报告了一种压缩变形可恢复的高抗冲击柔性复合材料，通过原位聚合方法将剪切增强聚硼硅氧烷（PBS）凝胶封装到3d打印的超弹性硅橡胶（SE）骨架中，解决了传统PBS的冷流动和回弹性差等关键局限性。该方法实现了PBS在复合材料中的均匀和高填充，无泄漏。弹性SE骨架和应变率敏感的PBS之间的协同作用使得SE骨架和PBS在低应变率下具有出色的能量耗散效率（83.6%）和高的可恢复性（96.7%）。该复合材料表现出优异的抗冲击性，在高能冲击下峰值力降低69.1 - 80.6%，并表现出应变率相关的能量吸收增强（5153 s−1时增加79倍），优于EVA泡沫等商用材料。此外，由于PBS通过冷流行为的自愈能力，复合材料在高速撞击后仍能保持结构完整性。我们的方法为设计具有良好弹性恢复，高抗冲击性和可重复使用能量耗散特性的复合材料提供了一种方法，可用于可穿戴系统，精密设备和先进装甲。

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引用次数: 0

A novel PEO-based composite solid-state electrolyte modified by ion conducting Cr3C2 for lithium metal batteries 锂金属电池用离子导电Cr3C2改性peo基复合固态电解质

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-07 DOI: 10.1016/j.compscitech.2025.111432

Rui Cao , Haihua Wang , Yong-Mook Kang , Chaoxian Chen

PEO-based polymer solid-state electrolytes have attracted significant traction in solid-state lithium metal batteries owing to their flexibility and preeminent lithium ions transfer capability. However, their progress has been constrained by limited ion conductivity, poor mechanical properties, and unstable interfaces. In this study, we incorporated the inorganic filler Cr₃C₂ into PEO and blended it with the plasticizer succinonitrile (SN), thereby developing PEO-based composite solid-state electrolytes (CSSEs) that exhibit superior electrochemical performance. The synergistic effect of Cr₃C₂ and PEO restricts the movement of lithium salt anions through chemical bonds, thereby creating more active space for efficient lithium-ion transport and improving the lithium transference number (t_Li+). The PCN5 CSSEs exhibits excellent room temperature lithium-ion migration of 0.96 and superior ionic conductivity over an extensive temperature range (25 °C–80 °C). Moreover, the LFP|PCN5|Li cell delivers discharge capacity of 165.3 mAh g⁻¹ and retains 70.6 % of its original capacity after 500 cycles when tested at 60 °C. Furthermore, the Li|PCN5|Li cell operates stably over 5000 h at a current density of 0.1 mA cm⁻² owing to the improved mechanical properties from hydrogen bonding between Cr₃C₂ and PEO along with lithium dendrites suppressing effect of SN, which ensures long-term cycling performance. These results may position the PCN5 CSSEs as a viable option for next-generation solid-state lithium metal batteries.

peo基聚合物固态电解质由于其灵活性和优异的锂离子传输能力，在固态锂金属电池中引起了很大的关注。然而，它们的进展受到离子电导率有限、机械性能差和界面不稳定的限制。在本研究中，我们将无机填料Cr3C2加入到PEO中，并与增塑剂丁二腈（SN）共混，从而开发出具有优异电化学性能的PEO基复合固态电解质（csse）。Cr3C2与PEO的协同作用限制了锂盐阴离子通过化学键的移动，从而为锂离子的高效传递创造了更活跃的空间，提高了锂离子转移数（tLi+）。PCN5 cses在室温下的锂离子迁移率为0.96，在广泛的温度范围内（25°C - 80°C）具有优异的离子电导率。此外，LFP|PCN5|锂电池在60°C下测试时，放电容量为165.3 mAh g - 1，在500次循环后保持其原始容量的70.6%。此外，由于Cr3C2和PEO之间的氢键作用以及SN对锂枝晶的抑制作用，Li|PCN5|锂电池在0.1 mA cm−2的电流密度下稳定运行了5000 h以上，从而保证了锂枝晶的长期循环性能。这些结果可能使PCN5 cses成为下一代固态锂金属电池的可行选择。

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引用次数: 0

Hydrothermal aging induced interfacial degradation behavior of 3D printed continuous glass fiber composites 水热老化诱导3D打印连续玻璃纤维复合材料界面降解行为

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-17 DOI: 10.1016/j.compscitech.2025.111452

Kui Wang , Gejin Zhao , Ying Chen , Bing Yang , Yong Peng , Yanni Rao

This study investigated the interfacial degradation behavior of continuous glass fiber-reinforced composites fabricated using the fused deposition manufacturing technique under accelerated hydrothermal aging. The accelerated aging was conducted at 60 °C and 100 % relative humidity for up to 30 days. The bonding strength of three interlayer structures, including the polyamide 6 (PA6) matrix layer/PA6 matrix layer (M/M), PA6 matrix layer/continuous glass fiber layer (M/G), and continuous glass fiber layer/continuous glass fiber layer (G/G), was evaluated through roller peeling tests. The results indicated that the M/M interlayer specimen (Inter-M/M) exhibited the highest peeling strength, while the G/G interlayer specimen (Inter-G/G) showed the lowest peeling strength for the as-prepared specimens. The primary failure mode in Inter-M/M was characterized by plastic deformation and ductile fracture of the matrix, while the main failure mode in Inter-G/G involved the debonding of continuous glass fibers from the matrix. After aging, the bonding strength of all three interlayer structures declined to varying degrees, with the M/G interlayer specimen (Inter-M/G) showing the greatest reduction. The effects of hydrothermal aging on interfacial degradation were primarily characterized by a change in the matrix failure mode, reduced crack initiation in adjacent layers, and weakened bonding between fibers and matrix.

研究了熔融沉积法制备的连续玻璃纤维增强复合材料在加速水热老化条件下的界面降解行为。在60°C和100%相对湿度下进行加速老化，最长可达30天。通过滚剥试验，对聚酰胺6 （PA6）基层/PA6基层（M/M）、PA6基层/连续玻璃纤维层（M/G）、连续玻璃纤维层/连续玻璃纤维层（G/G）三种层间结构的结合强度进行了评价。结果表明：M/M夹层试样（Inter-M/M）的剥离强度最高，G/G夹层试样（Inter-G/G）的剥离强度最低；Inter-M/M的主要破坏模式是基体的塑性变形和韧性断裂，而Inter-G/G的主要破坏模式是连续玻璃纤维与基体的剥离。时效后，3种夹层组织的结合强度均有不同程度的下降，其中M/G夹层试样（Inter-M/G）的结合强度下降幅度最大。热液时效对界面降解的影响主要表现为基体破坏模式的改变、相邻层裂纹萌生的减少以及纤维与基体结合的减弱。

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引用次数: 0

Carbon nanotube-graphite felt reinforced composite phase change materials for synergistic energy conversion and thermal management 碳纳米管-石墨毡增强复合相变材料的协同能量转换和热管理

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2026-02-08 Epub Date: 2025-11-19 DOI: 10.1016/j.compscitech.2025.111454

Xuebing Dai , Liping Zeng , Qianyao Zhang , Su Huan , Xiaohua Li

Amid escalating global energy demands and the imperative transition toward sustainable energy systems, phase change materials (PCM) have emerged as pivotal enablers for enhancing energy efficiency. However, organic PCM face leakage susceptibility and inadequate thermal/electrical conductivity, which have critically constrained their practical deployment in renewable energy applications. This study innovatively engineered a carbon nanotube-reinforced graphite felt composite PCM (CNT/GF-MPP) through a rational structural hybridization strategy. By integrating a three-dimensional graphite felt scaffold with carbon nanotubes to adsorb ternary co-crystals (MPP), the composite achieved synergistic enhancement of capillary forces and crystallization kinetics, resulting in a remarkable loading factor of 91.42 % while suppressing leakage to 4.8 % at 70 °C. The architecture demonstrated exceptional thermal conductivity with 1.15 W/(m·K), 259 % improvement over pristine MPP and maintained a phase change enthalpy of 182.3 J/g at optimal CNT loading (0.1 %wt). It has dual-mode energy conversion capabilities: a photothermal efficiency of 90.0 % under 1-sun irradiation and an electrothermal conversion efficiency of 71.9 % at 2.5 V. The composite exhibited maintaining 98.8 % enthalpy retention over 100 thermal cycles. Practical verification of thermal management demonstrates precise regulation of body temperature (26.5–26.8 °C) during physical activity. This research provides technical support for multifunctional thermal management.

随着全球能源需求的不断增长和向可持续能源系统的迫切转变，相变材料（PCM）已成为提高能源效率的关键推动者。然而，有机PCM面临泄漏敏感性和导热/导电性不足，这严重限制了其在可再生能源应用中的实际部署。本研究通过合理的结构杂交策略，创新地设计了碳纳米管增强石墨毡复合材料PCM （CNT/GF-MPP）。通过将三维石墨毡支架与碳纳米管集成以吸附三元共晶（MPP），复合材料实现了毛细力和结晶动力学的协同增强，导致加载系数达到91.42%，同时在70°C时将泄漏抑制到4.8%。该结构的导热系数为1.15 W/(m·K)，比原始MPP提高了259%，在最佳碳纳米管负载（0.1% wt）下保持了182.3 J/g的相变焓。它具有双模能量转换能力：在1太阳照射下光热效率为90.0%，在2.5 V下电热转换效率为71.9%。该复合材料在100次热循环中保持了98.8%的焓保持。热管理的实际验证表明，在身体活动期间，体温（26.5-26.8°C）的精确调节。本研究为多功能热管理提供了技术支持。

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