【新文速递】2025年3月11日固体力学SCI期刊最新文章

今日更新：Composite Structures 2 篇，Composites Part B: Engineering 10 篇，Composites Science and Technology 1 篇Composite StructuresBio-inspired hybrid composite fabrication 3D-printing approach for multifunctional flexible wearable sensors applicationsMuhammad Imran Farid, Wenzheng Wu, Guiwei Li, Yitong Sun, Zhibo Zhang, Fangyu Zhangdoi:10.1016/j.compstruct.2025.119046 多功能柔性可穿戴传感器的仿生混合复合材料制造3d打印方法A bio-inspired, hybrid, multifunctional flexible sensor is developed for wearable applications. The hybrid sensor is fabricated using Fused Deposition Modeling (FDM) 3D printing and incorporates significant technical innovations. This sensor integrates a thermoplastic polyurethane (TPU-base core body) filament, graphene, and Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) PEDOT: PSS made-composite, utilizing a novel dip-coating technique to create high-aspect-ratio channels. Critically, we have developed a new method to compensate for drooping in bridging layers during the FDM printing process, a significant challenge in achieving precise microstructures. Demonstrating its potential for strain, temperature, pressure, and health monitoring. Results exhibit a high gauge factor (GF) of ≈4033.2 at 30 % tensile strain, detect strains as low as 0.01 %, and achieve a stretchability of 250 %. Furthermore, it demonstrates sensitivity to pressures ranging (max 150 %, mini 10 Pa), dynamic stretching (at 2, 6, 9, 10, 18, 21 mm), and thermal performance (0–90 °C). Subsequently, we propose on-site monitoring; the sensor’s ability to detect subtle and vigorous human motions is highlighted, suggesting its suitability for bodily deformations including subtle movements. This approach, incorporating these key fabrication innovations, paves the way for advanced wearable sensors capable of detecting a wide range of human motions for diverse healthcare applications.一种生物启发，混合，多功能柔性传感器的开发可穿戴应用。该混合传感器采用熔融沉积建模（FDM） 3D打印制造，并结合了重要的技术创新。该传感器集成了热塑性聚氨酯（tpu基芯体）长丝、石墨烯和聚（3,4-乙烯二氧噻吩）-聚（苯乙烯磺酸盐）PEDOT: PSS制成的复合材料，利用新型浸涂技术创建高宽高比通道。关键的是，我们开发了一种新方法来补偿FDM打印过程中桥接层的下垂，这是实现精确微结构的重大挑战。展示了它在应变、温度、压力和健康监测方面的潜力。结果表明，在30 %的拉伸应变下，测量因子(GF)≈4033.2，检测应变低至0.01 %，拉伸性能达到250 %。此外，它还表现出对压力范围（最大150 %，最小10 Pa），动态拉伸（2,6,9,10,18,21 mm）和热性能（0-90 °C）的敏感性。随后，我们提出现场监测；该传感器能够检测细微而剧烈的人体运动，这表明它适合包括细微运动在内的身体变形。这种方法结合了这些关键的制造创新，为先进的可穿戴传感器铺平了道路，这些传感器能够检测各种医疗保健应用中的各种人体运动。Effects of shear connection methods on the performance of UHPFRC-NC hybrid beams with U-shaped GFRP stay-in-place formworksYaqi Li, Zihua Zhang, Zhenjun Yang, Muhirwa Fernand, Tao Jiangdoi:10.1016/j.compstruct.2025.119052剪切连接方式对u型GFRP模板UHPFRC-NC混合梁性能的影响This paper investigates the effects of shear connection methods on the performance of Ultra-high performance fiber reinforced concrete (UHPFRC)-normal concrete (NC) hybrid beams with U-shaped glass fiber-reinforced polymer (GFRP) stay-in-place (SIP) formworks. A total of 21 beams were tested under three-point bending to evaluate their load capacity, failure mechanisms, strain evolution, and cost performance. The specimens included 15 hybrid beams with various shear connection methods—resin-bonding, resin-bonding plus I-shaped GFRP profiles, and resin-bonding plus steel bolts at different spacings—as well as six control beams without SIP formworks for comparison. The complex microscale failure mechanisms were visualized through μXCT scanning. Results indicated that GFRP connectors demonstrated the highest bonding performance and load capacity among all connection methods, while steel bolt connectors provided the best post-failure ductility. The incorporation of SIP formworks significantly enhanced the structural performance of the hybrid beams, maximizing the utilization of UHPFRC’s high compressive strength. Compared to traditional reinforced UHPFRC beams, the hybrid beams achieved 22.7% higher peak loads while reducing UHPFRC usage by 63.2%. Cost effective analysis revealed that hybrid beams with GFRP connectors exhibit the best cost performance among different shear connection methods, with 68.2% higher than that of traditional reinforced UHPFRC beams.研究了不同剪切连接方式对u型玻璃纤维增强聚合物（GFRP）静置模板下超高性能纤维增强混凝土(UHPFRC)-普通混凝土（NC）混合梁性能的影响。共有21根梁在三点弯曲下进行了测试，以评估其承载能力、破坏机制、应变演化和性价比。试件包括15根采用不同剪切连接方式的混合梁——树脂粘接、树脂粘接+ i型GFRP型材、树脂粘接+不同间距钢螺栓——以及6根不采用SIP模板的对照梁进行比较。通过μXCT扫描显示了复杂的微尺度失效机制。结果表明，GFRP连接件的连接性能和承载能力最高，而钢栓连接件的破坏后延性最好。SIP模板的结合显著提高了混合梁的结构性能，最大限度地利用了UHPFRC的高抗压强度。与传统的UHPFRC增强梁相比，混合梁的峰值荷载提高了22.7%，同时UHPFRC的使用量减少了63.2%。成本效益分析表明，GFRP连接组合梁在不同剪切连接方式中性价比最佳，比传统UHPFRC加固组合梁的成本效益高68.2%。Composites Part B: EngineeringFrom nanoscale to printed products: Multiscale modeling and experimental characterization of graphene-enhanced polylactic acid composites for 3D printingAtta Muhammad, Clara Valero, Paolo De Angelis, Nikolaos Koutroumanis, Dionisis Semitekolos, Bárbara Jiménez, Rubén Rivera, Carlos Sáenz Ezquerro, Rajat Srivastava, Panagiotis-Nektarios Pappas, Costas Galiotis, Costas A. Charitidis, Eliodoro Chiavazzo, Pietro Asinari, Manuel Laspalas, Agustín Chiminelli, Matteo Fasanodoi:10.1016/j.compositesb.2025.112354 从纳米级到打印产品：3D打印石墨烯增强聚乳酸复合材料的多尺度建模和实验表征Carbon-based nanoparticles can significantly enhance the specific characteristics of polymers, impacting mechanical, thermal, electrical, and magnetic properties. However, incorporating these enhancements into final products can be challenging due to the influences of subsequent processing steps required to transform the material into components. This is the case of nano-modifications of 3D printing thermoplastic filaments. The filament characteristics and the printing process’s resulting material microstructure affect the final properties of the material produced. The resulting material exhibits a hierarchical multiscale structure, necessitating a combination of various simulation approaches and methods to capture the relevant effects and influences across different scales, ultimately allowing for accurate prediction of the final material response in the product. This study focuses on predicting key thermal and mechanical properties of polymer nanocomposites and 3D printing materials. The analysis is based on coarse-grained molecular dynamics and continuum models across different scales, complemented by experimental characterization of the base material (filament) and micrographic analysis of the printed material. The findings demonstrate the potential of modeling to predict various material responses. The multiscale model reveals that with a modest addition of nanofiller (up to 2 wt%), the Young’s modulus and thermal conductivity show up to 11% enhancement. These predictions closely align with the experiments, exhibiting a maximum deviation of 2.3%. In conclusion, this study demonstrates that the combination of diverse modeling techniques and experimental validation provides valuable guidance for materials development and engineering, as well as a deeper understanding of the process/structure/properties relationships.碳基纳米颗粒可以显著增强聚合物的特定特性，影响其机械、热学、电学和磁性能。然而，由于将材料转化为组件所需的后续加工步骤的影响，将这些增强功能整合到最终产品中可能具有挑战性。这是3D打印热塑性长丝的纳米改性的情况。长丝特性和打印过程中产生的材料微观结构影响所生产材料的最终性能。由此产生的材料呈现出分层的多尺度结构，需要结合各种模拟方法和方法来捕获不同尺度的相关效应和影响，最终允许准确预测产品中的最终材料响应。本研究的重点是预测聚合物纳米复合材料和3D打印材料的关键热性能和力学性能。分析是基于粗粒度的分子动力学和不同尺度的连续模型，辅以基础材料（长丝）的实验表征和印刷材料的显微分析。这些发现证明了建模预测各种材料响应的潜力。多尺度模型显示，适量添加纳米填料（高达2 wt%），杨氏模量和导热系数可提高11%。这些预测与实验结果非常吻合，最大偏差为2.3%。总之，本研究表明，多种建模技术和实验验证的结合为材料开发和工程提供了有价值的指导，以及对过程/结构/性能关系的更深入理解。INFLUENCE OF FIBER/MATRIX INTERFACE ON GAS PERMEABILITY PROPERTIES OF CF/TP COMPOSITESGautier Allusse, Olivier De Almeida, Quentin Govignon, Monica Pucci, Fabrice Schmidtdoi:10.1016/j.compositesb.2025.112358纤维/基体界面对cf / tp复合材料透气性的影响For hydrogen application, one of the most important material property required is low gas permeability. In composite materials, this property depends on the materials but also on the processing parameters. In particular the residual porosity, but also the quality of the fiber/matrix interface, play a crucial role. This is particularly the case in composites involving a thermoplastic matrix with carbon fibers as the lack of reactive groups on the fiber surface can limit the level of interfacial interactions between the reinforcement and the matrix. In this study, the role of the interface is analyzed through the investigation of the hydrogen permeability of carbon fiber reinforced thermoplastics (CF/PVDF and CF/PPS) using different polymers and carbon fibers. The hydrogen permeability of the composites was measured, and a correlation with the crystallization behavior of the matrix on the fiber surface was identified. Hydrogen permeability decreases when the fiber favors matrix nucleation. Nucleation is improved by increasing the surface roughness of the carbon fiber.对于氢气的应用，最重要的材料特性之一是低透气性。在复合材料中，这种性能不仅取决于材料本身，还取决于加工参数。特别是残余孔隙率，以及纤维/基体界面的质量，起着至关重要的作用。这在含有碳纤维的热塑性基体的复合材料中尤其如此，因为纤维表面缺乏活性基团会限制增强材料和基体之间的界面相互作用水平。本研究通过对不同聚合物和碳纤维的碳纤维增强热塑性塑料（CF/PVDF和CF/PPS）的渗氢性能的研究，分析了界面的作用。测定了复合材料的氢渗透性能，并确定了复合材料的氢渗透性能与纤维表面基体的结晶行为之间的关系。当纤维有利于基体成核时，氢渗透性降低。增加碳纤维的表面粗糙度可以改善成核。Multi-material 3D printing of continuous carbon fibre reinforced thermoset composites with tailored fibre paths and bespoke conforming thermoplastic mouldsHaoqi Zhang, Aonan Li, Jiang Wu, Dongmin Yangdoi:10.1016/j.compositesb.2025.112373 多材料3D打印连续碳纤维增强热固性复合材料，具有定制的纤维路径和定制的符合热塑性塑料模具This paper proposes a novel additive manufacturing approach for rapid, integrated fabrication of complex structures made from 3D-printed composites with low porosity and a high continuous fibre content. Continuous carbon fibre reinforced epoxy composites with >50% fibre volume fraction were printed in parallel with short carbon fibre reinforced polyamide-6 (PA6) conforming moulds which have a melt temperature higher than the curing temperature of epoxy. The research further optimised the continuous fibre paths through experiments and as-manufactured finite element simulations, using 3D-printed truss structures under three-points bending as a case study. Additionally, the incorporation of polylactic acid (PLA) with a lower melting temperature, enhanced compatibility and bonding between the epoxy and PA6. The approach was applied and demonstrated for a lightweight composite wing box using tailored material interface and customised reinforcement alongside varying infill densities. This approach also opens up possibilities for assembling lightweight, large-scale composite structures using 3D-printed high-performance continuous carbon fibre units.本文提出了一种新的增材制造方法，用于快速集成制造具有低孔隙率和高连续纤维含量的3d打印复合材料制成的复杂结构。采用熔体温度高于环氧树脂固化温度的短碳纤维增强聚酰胺-6 （PA6）成型模具并联打印纤维体积分数为> ~ 50%的连续型碳纤维增强环氧复合材料。该研究以三点弯曲下的3d打印桁架结构为例，通过实验和制造的有限元模拟进一步优化了连续纤维路径。此外，聚乳酸（PLA）的掺入具有较低的熔融温度，增强了环氧树脂与PA6之间的相容性和粘合性。该方法被应用于轻型复合材料翼盒中，该翼盒采用了定制的材料界面和定制的增强材料以及不同的填充密度。这种方法也为使用3d打印高性能连续碳纤维单元组装轻质大规模复合结构提供了可能性。Engineered Advanced Light-weight Sustainable Composites from Surface Modified Recycled Carbon Fiber Reinforced Polyamide 6,6 for Metallic Part Alternative in AutomotivesKehinde Olonisakin, Arturo Rodriguez-Uribe, Tao Wang, Amar K. Mohanty, Mahendra Thimmanagari, Manjusri Misradoi:10.1016/j.compositesb.2025.112375 由表面改性再生碳纤维增强聚酰胺6,6制成的先进轻质可持续复合材料，用于汽车金属部件的替代The study focuses on utilizing recycled carbon fiber (rCF) as a reinforcement material in high-performance polyamide 6,6 (PA 6,6) advanced composites for lightweight automotive applications. Two types of rCF were used: untreated and polyurethane treated (pu-rCF). The composite materials were prepared through melt-extrusion followed by injection molding, with varying rCF weight percentages (20 and 25%). The pu-rCF demonstrated improved fiber-matrix adhesion, leading to enhanced mechanical performances than untreated rCF. The highest tensile strength and modulus achieved were 180 MPa and 16 GPa, respectively. The flexural strength and flexural modulus showed maximum values of 274 MPa and 13 GPa, respectively. The heat deflection temperature reached 246°C for the 25 wt.% pu-rCF composites. Fourier-transform infrared spectroscopy suggests chemical interactions between the fibers and PA 6,6, which was confirmed by the fiber-matrix adhesion study from dynamic mechanical analyses. Flammability testing indicated that the composites reinforced with rCF and 20wt.% pu-rCF achieved a V2 rating in the UL-94 vertical test. Rheological analysis revealed that pu-rCF increases the stiffness of the composite due to improved fiber-matrix interaction. These advanced composites offer high-strength, lightweight sustainable alternatives to metallic components currently used in door frames, bumpers, seat frames in automotive structures.该研究的重点是利用再生碳纤维（rCF）作为增强材料，制成高性能聚酰胺6,6 （pa6,6）高级复合材料，用于汽车轻量化应用。使用两种类型的rCF：未经处理和聚氨酯处理（pu-rCF）。复合材料通过熔融挤压和注射成型制备，rCF重量百分比分别为20%和25%。与未经处理的rCF相比，pu-rCF具有更好的纤维基质粘附性，从而提高了机械性能。最高抗拉强度和模量分别为180 MPa和16 GPa。抗弯强度和抗弯模量的最大值分别为274 MPa和13 GPa。25wt % pu-rCF复合材料的热变形温度达到246℃。傅里叶红外光谱分析表明，纤维与pa6,6之间存在化学相互作用，这一结果得到了动态力学分析中纤维-基质粘附研究的证实。可燃性试验表明，用rCF和20wt增强复合材料。% pu-rCF在UL-94垂直测试中达到V2等级。流变分析表明，pu-rCF增加了复合材料的刚度，因为改善了纤维-基质的相互作用。这些先进的复合材料为目前汽车结构中门框、保险杠、座椅框架中使用的金属部件提供了高强度、轻量化的可持续替代品。A promising high-temperature oxygen barrier of ZrB2-HfSi2-TaSi2 coating for 1500 °C based on HfSi2-TaSi2 dual-transition-metal silicide alloying enhancementYuexing Chen, Xiang Ji, Peipei Wang, Zhichao Shang, Chengshan Ji, Zhengang Zhang, Philipp V. Kiryukhantsev-Korneev, Evgeny A. Levashov, Xuanru Ren, Peizhong Fengdoi:10.1016/j.compositesb.2025.112384基于HfSi2-TaSi2双过渡金属硅化物合金化强化的ZrB2-HfSi2-TaSi2涂层的1500℃高温氧障研究To enhance the self-healing capability and high-temperature oxidation resistance of ZrB2-silicon-based coatings, HfSi2-TaSi2 dual-transition metal silicide alloying reinforcement was used in ZrB2-HfSi2-TaSi2 coatings, and the oxygen barrier reinforcement effect on different ratios of HfSi2-TaSi2 alloying compositions was investigated. The results demonstrate that the synergistic strengthening effect of HfSi2-TaSi2 dual silicide alloying significantly enhances the stability at high temperatures and the oxygen barrier performance of the coatings. Notably, the coating containing 30 vol.% TaSi2 exhibited optimal oxidation resistance, with a mass change rate reduction of 79.32% and an oxygen permeability decrease of 93.75%. This observed improvement in performance is attributed to the stabilization of the glassy structure through the action of TaSi2 via a "network compensation" mechanism, which effectively inhibits the aggregation of oxide particles. However, an excess of TaSi2 resulted in the depolymerization of the glassy film, diminishing its defect-healing capacity and leading to an increase in oxygen permeability to 0.53%. This research provides new insights for the development of efficient oxidation-resistant coatings.为了提高zrb2 -硅基涂层的自愈能力和高温抗氧化性，在ZrB2-HfSi2-TaSi2涂层中加入了双过渡金属硅化物合金化增强剂，并研究了不同比例的HfSi2-TaSi2合金化成分对氧障增强效果的影响。结果表明：HfSi2-TaSi2双硅化物合金的协同强化作用显著提高了涂层的高温稳定性和氧阻隔性能。值得注意的是，含有30 vol.% TaSi2的涂层具有最佳的抗氧化性能，质量变化率降低了79.32%，氧渗透率降低了93.75%。这种观察到的性能改善归因于TaSi2通过“网络补偿”机制的作用使玻璃结构稳定，该机制有效地抑制了氧化物颗粒的聚集。然而，过量的TaSi2导致玻璃膜的解聚，降低了其缺陷愈合能力，导致氧通透性增加到0.53%。该研究为高效抗氧化涂料的开发提供了新的思路。Microstructure and Mechanical Properties of Nano TiB Whisker-Reinforced Titanium Matrix Composites using Atomized Ti-TiB Composite Powder as Raw MaterialsLei Liu, Shufeng Li, Shaolong Li, Huiying Liu, Shaodi Wang, Dongxu Hui, Xin Zhang, Shota Kariya, Ammarueda Issariyapat, Junko Umeda, Katsuyoshi Kondoh, Bolv Xiao, Zongyi Madoi:10.1016/j.compositesb.2025.112392以雾化Ti-TiB复合粉末为原料制备纳米TiB晶须增强钛基复合材料的组织与力学性能In situ formed TiB-reinforced titanium matrix composites (TMCs) have gained significant attention for their high specific modulus and strength. However, the high sintering temperatures required for in situ reactions and densification can cause rapid coarsening of TiB whiskers, limiting the improvements in mechanical properties. This study proposes a "low-temperature sintering + hot extrusion" method to prepare nano TiB-reinforced Ti-TiB composites. The process involves low-temperature sintering at 800 °C—below the HCP-Ti phase transformation temperature—followed by hot extrusion for densification. The resulting Ti-TiB composites feature TiB with diameters of approximately 123 nm. The yield strength (YS) and ultimate tensile strength (UTS) of the nano TiB-reinforced Ti-TiB composites reach 632 MPa and 833 MPa, respectively, reflecting increases of 70% and 51% compared to microscale TiB-reinforced Ti-TiB composites, while maintaining an elongation (El) of 13.97%. The size evolution of TiB in the composites follows a temperature-dependent progression. Below 800 °C, TiB remains nanoscale, while temperatures above 800 °C, TiB grows to the microscale. The failure mode also shifts with TiB size, from interfacial debonding at the microscale to load-bearing fracture at the nanoscale. Additionally, the refinement of matrix grains and the obstruction of dislocations by nanoscale TiB further improve mechanical properties. This work opens a new controllable and facile route for preparing nano TiB-reinforced titanium matrix composites with promising properties.原位成形tib增强钛基复合材料（TMCs）因其高比模量和强度而受到广泛关注。然而，原位反应和致密化所需的高烧结温度会导致TiB晶须迅速粗化，限制了机械性能的提高。本研究提出了“低温烧结+热挤压”制备纳米tib增强Ti-TiB复合材料的方法。该工艺包括800°c的低温烧结-低于HCP-Ti相变温度-然后是热挤压致密化。所得Ti-TiB复合材料的TiB直径约为123 nm。纳米tib增强Ti-TiB复合材料的屈服强度（YS）和极限抗拉强度（UTS）分别达到632 MPa和833 MPa，与微尺度tib增强Ti-TiB复合材料相比，分别提高了70%和51%，伸长率（El）保持在13.97%。复合材料中TiB的尺寸演变遵循温度依赖的过程。在800°C以下，TiB保持纳米级，而在800°C以上，TiB生长到微米级。破坏模式也随着TiB尺寸的变化而变化，从微观尺度的界面脱粘到纳米尺度的承载断裂。此外，纳米TiB对基体晶粒的细化和位错的抑制进一步改善了材料的力学性能。本工作为制备具有良好性能的纳米tib增强钛基复合材料开辟了一条可控、简便的新途径。3D printing of heat-resistant thermosetting polyimide composite with high dimensional accuracy and mechanical propertyXinyu Du, Yi Liu, Wei Zhao, Lin Fan, Song Mo, Lei Zhai, Minhui He, Dan Peng, Qiuhong Mou, Gong Wangdoi:10.1016/j.compositesb.2025.1123943D打印具有高尺寸精度和机械性能的耐热热固性聚酰亚胺复合材料3D printing of polyimide parts with high heat resistance, dimensional accuracy and mechanical property is quite challenging because the manufacturing requirements restrict molecular structural design. Hence, combination of molecular design of thermosetting polyimide oligomer and a two-step reactive 3D printing strategy is conducted. Siloxane-containing phenylethynyl-terminated polyimide oligomer powders with milled carbon fibers are developed, which can be precured with laser scanning in a selective laser sintering (SLS) equipment, forming self-standing green parts with complex geometries. These green parts can be thermally postcured to polyimide parts with high dimensional stability. The linear shrinkage in Z axis is less than 4.74%. Oligomers experience crosslinking of phenylethynyl groups and oxidation crosslinking of siloxane units during SLS and postcuring. Therefore, the printed polyimide parts give a tensile strength of 82 MPa and a glass transition temperature of 419 oC. Honeycombs fabricated by this strategy give higher specific compression strength and can withstand temperature as high as 400 oC. The wear-resistant self-lubricating materials prepared by this approach exhibit a reliable tribological property after atomic oxygen and ultraviolet irradiations. These findings will provide useful insight for designing and fabricating structural components with complex shapes that might be applied in aerospace extreme environment.3D打印具有高耐热性、尺寸精度和机械性能的聚酰亚胺部件是相当具有挑战性的，因为制造要求限制了分子结构设计。因此，将热固性聚酰亚胺低聚物的分子设计与两步反应性3D打印策略相结合。研究了含硅氧烷的端部苯基乙基聚酰亚胺低聚物粉末，并采用选择性激光烧结（SLS）设备对其进行了激光扫描预处理，形成了具有复杂几何形状的独立绿色部件。这些绿色部件可以热固化成具有高尺寸稳定性的聚酰亚胺部件。Z轴线收缩率小于4.74%。低聚物在SLS和固化后经历了苯乙基的交联和硅氧烷单元的氧化交联。因此，打印的聚酰亚胺部件的抗拉强度为82 MPa，玻璃化转变温度为419℃。通过这种策略制造的蜂窝具有更高的比压缩强度，并且可以承受高达400℃的温度。该方法制备的耐磨自润滑材料经原子氧和紫外线辐照后具有可靠的摩擦学性能。这些发现将为设计和制造可能应用于航空航天极端环境的复杂形状结构部件提供有用的见解。Integrated hydrogel of fucoidan and rhCol III for bioprosthetic heart valves to promote the antithrombosis, anti-inflammatory, and anti-calcification propertiesKaiyang Huang, Cheng Zheng, Xueyu Huang, Bangquan Wei, Lepeng Chen, Gaocan Li, Li Yang, Yunbing Wangdoi:10.1016/j.compositesb.2025.112396岩藻糖聚糖和rhCol III集成水凝胶用于生物人工心脏瓣膜，促进抗血栓形成，抗炎和抗钙化性能Glutaraldehyde cross-linked bioprosthetic heart valves (BHVs) have been widely used in clinical practice for its superior hemodynamic properties and significantly reduced requirement on anticoagulant therapy. However, the lifespan and biocompatibility of BHVs remain limited due to thrombus accumulation, poor endothelialization, inflammation, and progressive calcification. In this study, we introduced heparin-like fucoidan and recombinant humanized type III collagen (rhCol III) into glutaraldehyde cross-linked BHVs (GLUT) through photoinduced polymerization, thereby preparing an integrated hydrogel functionalized BHV (Fu-rhCol III). This multifunctional hydrogel formed a biocompatible barrier, providing robust protection for internal valve fibers and exhibiting strong resistance to platelet adhesion and thrombus formation in vitro. The Fu-rhCol III effectively reduced the cytotoxicity of GLUT, accelerating the endothelialization process. Fu-rhCol III maintained the structural stability and mechanical properties brought by glutaraldehyde cross-linking. This composite hydrogel demonstrated the significant suppression of acute inflammatory responses and satisfactory anti-calcification effect in subcutaneous implantation test. 60-day implantation results indicated that calcium deposition of Fu-rhCol III decreased by 96% compared with GLUT. In summary, this integrated hydrogel modification provides a promising strategy for future design of BHVs.戊二醛交联生物人工心脏瓣膜（bhv）因其优越的血流动力学特性和显著降低抗凝治疗需求而广泛应用于临床。然而，由于血栓积聚、内皮化不良、炎症和进行性钙化，bhv的寿命和生物相容性仍然有限。在本研究中，我们通过光诱导聚合，将类肝素岩藻聚糖和重组人源化III型胶原（rhCol III）引入戊二醛交联BHV （GLUT）中，从而制备了一种集成水凝胶功能化BHV （Fu-rhCol III）。这种多功能水凝胶形成了一种生物相容性屏障，为内部瓣膜纤维提供了强大的保护，并在体外表现出很强的抗血小板粘附和血栓形成的能力。Fu-rhCol III有效降低GLUT的细胞毒性，加速内皮化过程。Fu-rhCol III保持了戊二醛交联带来的结构稳定性和力学性能。该复合水凝胶在皮下植入试验中表现出明显的抑制急性炎症反应和良好的抗钙化效果。60 d的植入结果表明，与GLUT相比，Fu-rhCol III的钙沉积减少了96%。总之，这种综合水凝胶改性为未来bhv的设计提供了一种很有前途的策略。Collaborative Improvement of Interfacial Properties of Carbon Fiber/Epoxy Resin Composites Through Modulus/Toughness Matching and Gradient InterfaceYujie Yue, Guojun Song, Li Li, Jie Zhao, Xupeng Li, Guoqiang Cao, Xiang Luo, Bentao Yu, Min Fang, Yuankai Li, Guangshun Wu, Lichun Madoi:10.1016/j.compositesb.2025.112398基于模量/韧性匹配和梯度界面协同改善碳纤维/环氧树脂复合材料界面性能The interface is crucial for the mechanical properties of composite which is tightly linked to the microstructure of CF surface and resin matrix. However, the modulus mismatch between CF and resin leads to stress concentration and poor interfacial performance. This study proposes a bidirectional structural design strategy aimed at optimizing the interfacial performance of CF/epoxy composites from the perspective of interfacial construction and modulus matching. An organic-inorganic three-dimensional hybrid particle <PDI,GO> (the notation <PDI,GO> indicates a composite formed between PDI and GO through both chemical and physical interactions) was synthesized to enhance the modulus and toughness of resin, as well as the chemical bonding, mechanical entanglement and wettability with resin of CF surface. Compared to the original and single pathway (either the CF or resin), the transverse tensile strength of the bidirectionally modified composites increased by 68.4 %, 31.2 % and 18.0 %, and the interlaminar shear strength increased by 23.6 %, 8.5 %, 18.6 %, respectively. Furthermore, a comprehensive exploration of synergistic reinforcement mechanisms and stress dispersion patterns at the composites was conducted. This bidirectional structural design strategy provides a new avenue for the next-generation high-performance composites in the fields of aerospace, rail transit and so on.界面对复合材料的力学性能起着至关重要的作用，它与碳纤维表面和树脂基体的微观结构密切相关。然而，CF与树脂之间的模量不匹配导致应力集中和界面性能差。本研究提出了一种双向结构设计策略，旨在从界面结构和模量匹配的角度优化CF/环氧复合材料的界面性能。合成了一种有机-无机三维杂化颗粒<PDI，GO>（符号<PDI，GO>表示PDI与GO通过化学和物理相互作用形成的复合材料），以提高树脂的模量和韧性，以及CF表面与树脂的化学键合、机械缠结和润湿性。与原始路径和单一路径（CF或树脂）相比，双向改性复合材料的横向抗拉强度分别提高了68.4%、31.2%和18.0%，层间抗剪强度分别提高了23.6%、8.5%和18.6%。此外，还对复合材料的协同增强机制和应力分散模式进行了全面的探索。这种双向结构设计策略为下一代高性能复合材料在航空航天、轨道交通等领域的应用提供了新的途径。Unexpected Processing-Induced Particle/Matrix Interactions in Magnetic Composites Based on Thermoplastic MatrixAndrei Munteanu, Alenka Vesel, Arman Moini Jazani, Michal Sedlacik, Petra Drohsler, Martin Cvekdoi:10.1016/j.compositesb.2025.112399 基于热塑性基体的磁性复合材料中意外加工诱导的颗粒/基体相互作用Understanding processing-induced changes in the polymer composites is of the utmost necessity as it affects the final properties and the reliability of the products. Despite their importance, related investigations are frequently overlooked, especially in the case of magnetorheological elastomers (MREs). In this study, the processing-induced changes were investigated within an isotropic MRE based on a thermoplastic elastomer (TPE) matrix loaded with carbonyl iron (CI) microparticles. Systematic thermomechanical tests in the molten state were used to mimic the processing conditions, revealing the time evolution of the particle/matrix interactions. The interactions manifested as an increase in the viscoelastic properties, which was attributed to the development of a secondary network composed of the confined polymer chains in the vicinity of the CI particles. The restricted mobility improved the reinforcing effect and structural integrity but diminished the field-induced stiffening of the composite, i.e., the magnetorheological effect. The existence of the particle/matrix covalent bonding was postulated and explained based on the coupling reaction between the thermomechanically-induced radicals formed in the polymer chain and the alkoxyl radicals on the surface of the CI particles. The new findings are highly relevant for the further development of reprocessable and recyclable TPE-based MREs, while the robust measuring protocol is deemed to be implementable for studying particle/matrix interactions in diverse composite systems.了解加工引起的聚合物复合材料的变化是非常必要的，因为它会影响产品的最终性能和可靠性。尽管它们很重要，但相关研究经常被忽视，特别是在磁流变弹性体（MREs）的情况下。在这项研究中，研究了基于热塑性弹性体（TPE）基质加载羰基铁（CI）微粒的各向同性MRE中加工引起的变化。在熔融状态下进行了系统的热力学测试，模拟了加工条件，揭示了颗粒/基体相互作用的时间演变。这种相互作用表现为粘弹性的增加，这是由于在CI颗粒附近形成了由受限聚合物链组成的二级网络。受限的迁移率提高了复合材料的增强效果和结构完整性，但减弱了复合材料的场致硬化，即磁流变效应。基于热机械诱导的聚合物链自由基与CI颗粒表面的烷氧基自由基之间的偶联反应，假设并解释了颗粒/基体共价键的存在。这些新发现与进一步开发可再处理和可回收的tpe基MREs高度相关，而稳健的测量方案被认为可用于研究不同复合系统中的颗粒/基质相互作用。Composites Science and TechnologyA Multifunctional Flexible Sensor with Dual-Conductive Networks for Monitoring Human Motion Signals and Sweat pH/Lactic AcidHaoze Du, Yiwei Li, Ran Chen, Shichen Liang, Shuoqi Tian, Yuhao Cao, Ning Cui, Hui Yangdoi:10.1016/j.compscitech.2025.111130 用于监测人体运动信号和汗液pH/乳酸的双导电网络多功能柔性传感器Flexible wearable sensors have garnered significant attention for monitoring human motion signals and detecting sweat composition due to their high flexibility, consistency, and low cost. However, existing problems such as poor conductivity, inadequate flexibility, low sensitivity and unstable sensing performance present bottlenecks to their further development. This paper presents a novel highly-conductive, ultra-soft, and freeze-resistant poly(acrylamide-acrylic acid)/polyaniline/lithium bromide (PAMAAni/LiBr) hydrogel for monitoring human motion signal and detecting pH and lactic acid in sweat. The hydrogel establishes a dual conductive network by integrating the conjugated structure of polyaniline with the ionization principle of LiBr, which endows the hydrogel with excellent conductivity (4.6 S/m). Interactions between hydrogel networks, LiBr, and water molecules contribute to the hydrogel's low modulus (3.47 kPa) and remarkable freeze-resistant ability. Flexible sensors assembled from this hydrogel demonstrate a wide detection range (0.5%-200%), high sensitivity (strain range from 50% to 150%, gauge factor=3.24), and excellent fatigue resistance (exceeding 2000 cycles). This flexible sensor demonstrates high sensitivity in monitoring human activities in multiple scenarios, including joint movements, handwriting, and precise robotic hand control. Additionally, it exhibits excellent electrochemical performance for pH detection (pH 1-12) and lactic acid measurement with a wide detection range (0.25 mM-50 mM) and a low detection limit (1.98 μM), providing valuable insights for the development of innovative flexible wearable sensing devices.柔性可穿戴传感器由于其高灵活性、一致性和低成本，在监测人体运动信号和检测汗液成分方面受到了极大的关注。但目前存在电导率差、柔韧性不足、灵敏度低、传感性能不稳定等问题，是制约其进一步发展的瓶颈。本文介绍了一种新型的高导电性、超软性、抗冻性的聚（丙烯酰胺-丙烯酸）/聚苯胺/溴化锂（PAMAAni/LiBr）水凝胶，用于监测人体运动信号和检测汗液中的pH和乳酸。该水凝胶将聚苯胺的共轭结构与LiBr的电离原理相结合，建立了双导电网络，使水凝胶具有优异的电导率（4.6 S/m）。水凝胶网络、LiBr和水分子之间的相互作用使水凝胶具有低模量（3.47 kPa）和出色的抗冻能力。由该水凝胶组装的柔性传感器具有宽检测范围（0.5%-200%），高灵敏度（应变范围从50%到150%，测量因子=3.24）和优异的抗疲劳性（超过2000次循环）。这种柔性传感器在多种情况下监测人类活动具有高灵敏度，包括关节运动，手写和精确的机械手控制。此外，它在pH检测（pH 1-12）和乳酸检测中表现出优异的电化学性能，具有宽检测范围（0.25 mM-50 mM）和低检测限（1.98 μM），为创新柔性可穿戴传感设备的开发提供了宝贵的见解。 来源：复合材料力学仿真Composites FEM