Composites Science and Technology最新文献_第2页

Investigation on compressive damage mechanisms of 3DWCs by a novel AE damage identification method based on modal energy analysis 基于模态能量分析的声发射损伤识别方法研究三维dwcs压缩损伤机理

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

Composites Science and Technology

Pub Date : 2026-05-03 Epub Date: 2026-02-10 DOI: 10.1016/j.compscitech.2026.111570

Yan Wang , Kai Huang , Zhen-Xin Wang , Fang Xu , Zhengda Lou , Jinyuan Zhang , Yunpeng Gao , Licheng Guo

In recent years, acoustic emission (AE)-based damage identification methods have made some progress in the field of three-dimensional woven composites (3DWCs). However, conventional AE feature-based methods may lose critical time-frequency information, while many waveform-based approaches lack a clear physical linkage between frequency characteristics and damage modes. Motivated by these limitations, this study aims to propose a novel damage identification method based on AE modal energy analysis to investigate the influence of structural variations on the compressive performance and damage mechanisms of 3DWCs. Specifically, three representative frequency bands are defined based on global frequency-domain analysis, and AE signals are decomposed into a set of frequency components using variational mode decomposition (VMD). Based on experiments designed to isolate specific damage mechanisms, correlations are established between specific frequency components and distinct damage modes. Compared with conventional AE-based approaches, this method exploits more comprehensive frequency-domain information of AE signals and provides improved physical interpretability. The damage mechanisms of 3DWCs under compressive loading are further examined through a combined analysis of AE, digital image correlation (DIC), and microscopic observations. The results reveal that the waviness of load-bearing yarns alters the relative contributions of damage modes and accelerates the onset of explosive damage development.

近年来，基于声发射（AE）的损伤识别方法在三维编织复合材料领域取得了一定进展。然而，传统的基于声发射特征的方法可能会丢失关键的时频信息，而许多基于波形的方法在频率特征和损伤模式之间缺乏明确的物理联系。基于这些局限性，本研究旨在提出一种基于声发射模态能量分析的损伤识别新方法，研究结构变化对3DWCs压缩性能和损伤机制的影响。具体而言，基于全局频域分析定义了三个代表性频带，并利用变分模态分解（VMD）将声发射信号分解为一组频率分量。基于分离特定损伤机制的实验，建立了特定频率分量与不同损伤模式之间的相关性。与传统的声发射方法相比，该方法利用了更全面的声发射信号频域信息，提高了声发射信号的物理可解释性。通过声发射、数字图像相关（DIC）和微观观察的联合分析，进一步研究了压缩载荷下3DWCs的损伤机制。结果表明，承载纱的波纹度改变了损伤模式的相对贡献，加速了爆炸损伤发展的发生。

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引用次数: 0

Catalyst-free recyclable and flame-retardant epoxy resins towards sustainable polymer composites 无催化剂可回收和阻燃环氧树脂可持续聚合物复合材料

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-23 DOI: 10.1016/j.compscitech.2026.111536

Yongfeng Xu , Qingbing Fan , Haonan Li , Zhuang Hao , Yue Hao , Qiuyu Zhang , Chunmei Li

Epoxy resins and their fiber reinforced composites are widely used for low density, high strength, easy processing and superior mechanical performance. However, their inherent flammability and cross-linked structure hinder fire safety and recyclability. This work presents a novel approach by incorporating reactive flame retardants-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and a cyclotriphosphazene derivative-along with dual dynamic covalent bonds into the epoxy network. Specifically, a hexahydroxyl cyclotriphosphazene compound (HCCP–OH) bearing imine linkages is synthesized and employed as curing accelerator for epoxy resin, in combination with DOPO and methylhexahydrophthalic anhydride (MeHHPA). The resulting thermosetting epoxy resin contains reversible imine and ester bonds, exhibits a tensile strength of 87.1 MPa, a limiting oxygen index (LOI) of 34.0%, and a UL-94 V-0 rating. Moreover, the resin can be reprocessed from powders into sheets via hot-pressing at 180 °C and 5 MPa for 1 h without any catalyst and completely degraded in diethylenetriamine at 130 °C for 6 h. Additionally, carbon fiber reinforced polymer (CFRP) composites based on this matrix demonstrate superior mechanical and flame-retardant properties. They can retain about 60% of initial flexural strength after three healing cycles, while the fabrics are recovered intact through epoxy depolymerization. The strategy offers a practical route to sustainable, fire-safe composites.

环氧树脂及其纤维增强复合材料具有密度低、强度高、易加工、机械性能优越等优点，应用广泛。然而，它们固有的可燃性和交联结构阻碍了防火安全性和可回收性。这项工作提出了一种新的方法，通过将反应性阻燃剂-9,10-二氢-9-氧-10-磷酸菲-10-氧化物（DOPO）和环三磷腈衍生物-以及双动态共价键结合到环氧网络中。具体而言，合成了一种带有亚胺键的六羟基环三磷腈化合物（HCCP-OH），并与DOPO和甲基六氢邻苯二酸酐（MeHHPA）结合，作为环氧树脂的固化促进剂。所得热固性环氧树脂含有可逆的亚胺和酯键，抗拉强度为87.1 MPa，极限氧指数（LOI）为34.0%，UL-94 V-0等级。此外，该树脂可以在180°C和5 MPa下无任何催化剂的情况下通过热压1小时将粉末再加工成片状，并在130°C的二乙烯三胺中完全降解6小时。此外，基于该基体的碳纤维增强聚合物（CFRP）复合材料具有优异的机械和阻燃性能。经过三次修复循环后，织物仍能保持60%左右的初始抗弯强度，而通过环氧树脂解聚，织物恢复完整。该策略为可持续的防火复合材料提供了一条实用的途径。

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引用次数: 0

Dual-enhanced hydrogel actuators enabled by tuning the polymer network through synergistic CNT-dynamic covalent bonds 通过协同碳纳米管动态共价键调整聚合物网络，实现双增强水凝胶致动器

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-24 DOI: 10.1016/j.compscitech.2026.111539

Wenjing Yang, Jinhan Zhou, Qin Yang, Tianrui Qiu, Sha Yu

Hydrogel actuators hold significant potential for applications particularly in soft robots. However, designing hydrogel actuators that simultaneously exhibit both excellent mechanical properties and high actuation speeds remains challenging due to the inherent trade-off between these two characteristics. Herein, we propose a strategy to enhance a dual-network hydrogel by incorporating carboxylated carbon nanotubes (CNTs). This design is rooted in a synergistically enhanced network of CNTs and dynamic disulfide bonds to achieve both robustness and rapid actuation, which distinguishes it from conventional systems. The hydrogel matrix is composed of N,N-diethylacrylamide (DEMA) and poly (vinylalcohol) (PVA), crosslinked by disulfide bonds, with CNTs embedded within. The PDEMA/PVA/CNT hydrogel actuator was fabricated via a simple one-pot synthesis method combined with freeze-thaw cycles. The actuator exhibits a tensile strength of 60 kPa and a fracture elongation of 648.5 %, which are attributed to its reinforced network structure. It also demonstrates rapid photothermal actuation mediated by dynamic disulfide bond exchange, initiated by the photothermal conversion of CNTs under near-infrared light irradiation. Furthermore, the integrated strain-sensing functionality enables its application in human motion monitoring. This work presents a promising strategy to develop hydrogel actuators with excellent mechanical and actuation performance for soft robots and wearable sensors.

水凝胶致动器尤其在软机器人中具有巨大的应用潜力。然而，设计同时具有优异机械性能和高驱动速度的水凝胶执行器仍然具有挑战性，因为这两种特性之间存在固有的权衡。在此，我们提出了一种通过加入羧化碳纳米管（CNTs）来增强双网络水凝胶的策略。这种设计植根于协同增强的碳纳米管和动态二硫键网络，以实现鲁棒性和快速驱动，这与传统系统不同。水凝胶基质由N，N-二乙基丙烯酰胺（DEMA）和聚乙烯醇（PVA）组成，通过二硫键交联，并嵌入碳纳米管。采用简单的一锅法结合冻融循环制备了PDEMA/PVA/CNT水凝胶致动器。该驱动器的抗拉强度为60 kPa，断裂伸长率为648.5%，这主要归功于其增强的网状结构。它还证明了由近红外光照射下碳纳米管的光热转换引发的动态二硫键交换介导的快速光热驱动。此外，集成的应变传感功能使其能够应用于人体运动监测。这项工作为开发具有优异机械性能和驱动性能的水凝胶致动器提供了一种有前途的策略。

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引用次数: 0

Effect of pyrolysis degree on residual mechanical properties of low-density polymeric nanocomposites 热解程度对低密度聚合物纳米复合材料残余力学性能的影响

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-26 DOI: 10.1016/j.compscitech.2026.111544

Jie Xiao , Xiaoqiang Qin , Guodong Fang

Low-density polymeric nanocomposites are promising thermal protection materials due to their low density and low thermal conductivity, whereas their mechanical responses are affected by the high porosity and the pyrolysis state of the nanocomposites. The effect of the pyrolysis degree on the compressive mechanical properties of polymeric nanocomposites was investigated in this study. The specimens with different pyrolysis degrees were prepared based on the pyrolysis characteristics of the nanocomposites. The uniaxial compressive tests were conducted to analyze the compressive mechanical behavior and failure modes of the specimens with different pyrolysis degrees. It was found that with the increase of the pyrolysis degree, the elastic modulus and residual compressive strength of the low-density polymeric nanocomposites decrease, the porosity increases significantly, the interfacial strength between fibers and polymer matrix decreases, and the toughening mechanism of fibers in the nanocomposites declines as well. As pyrolysis progresses, the failure model transitions from unstable failure to compressive failure, reflecting the continuous deterioration of the nanocomposite microstructure.

低密度聚合物纳米复合材料因其低密度和低导热系数而成为一种很有前途的热防护材料，但其力学响应受纳米复合材料的高孔隙率和热解状态的影响。研究了热解程度对高分子纳米复合材料压缩力学性能的影响。根据纳米复合材料的热解特性，制备了不同热解程度的样品。通过单轴压缩试验，分析不同热解程度试样的压缩力学行为和破坏模式。研究发现，随着热解程度的增加，低密度聚合物纳米复合材料的弹性模量和残余抗压强度降低，孔隙率显著增加，纤维与聚合物基体之间的界面强度降低，纤维在纳米复合材料中的增韧机制减弱。随着热解过程的进行，破坏模式由不稳定破坏转变为压缩破坏，反映了纳米复合材料微观结构的不断劣化。

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引用次数: 0

Enhancing dynamic thermomechanical and conductivity performance of carbon fiber composites with different interface frameworks 增强不同界面框架碳纤维复合材料的动态热力学和导电性能

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-24 DOI: 10.1016/j.compscitech.2026.111537

Md Newaz Sharif, Pengfei Wang, Kassaw D. Jibrel, Wajahat Raza, Xiaoman Zhang, Junlan Zhan, Songlin Xu

Carbon fiber-reinforced polymers (CFRPs) have become indispensable in the aerospace and automotive industries owing to their superior strength-to-weight ratio and fatigue resistance. However, their structural integrity under combined extreme thermal conditions and high velocity impact remains a critical challenge in deep space exploration. Here, we developed a novel surface coating method incorporating Gold–Palladium (Au/Pd) and DLUX (Si

O_{2}

) to improve the dynamic stability of carbon fiber composites under high strain rates (∼3000s⁻¹) and elevated temperatures (25–225 °C). Dynamic compression tests reveal substantial improvements in strength, including a 133.0 % increase at 225 °C for the hybrid-coated laminate compared to the as-prepared composite. Additionally, strain energy analysis shows a 225.8 % increase in peak energy absorption and a 55.4 % gain in total energy density, indicating improved damage tolerance under extreme conditions. Microstructural analyses demonstrate enhanced fiber–matrix bonding, suppressed delamination, reduced thermal expansion, and excellent thermal conductivity, collectively sustaining structural integrity under coupled loading. Finite element simulations provide numerical validation of experimental results, capturing interfacial debonding and failure evolution under high strain-rate loading. These combined gains in strength retention, energy absorption, and thermal stability under simultaneous high strain-rate and elevated-temperature loading establish a hybrid interfacial design framework that directly addresses the long-standing vulnerability of carbon fiber composites in extreme environments, enabling next-generation thermal protection systems for aerospace, defense, and extreme-environment applications.

碳纤维增强聚合物（CFRPs）由于其优越的强度重量比和抗疲劳性，在航空航天和汽车工业中已成为不可或缺的材料。然而，它们在极端热条件和高速撞击下的结构完整性仍然是深空探测的关键挑战。在这里，我们开发了一种含有金钯（Au/Pd）和lux （Si O2）的新型表面涂层方法，以提高碳纤维复合材料在高应变率（~ 3000−1）和高温（25-225°C）下的动态稳定性。动态压缩测试表明，与制备的复合材料相比，混合涂层层压板在225℃下的强度提高了133.0%。此外，应变能分析表明，峰值能量吸收增加了225.8%，总能量密度增加了55.4%，表明在极端条件下的损伤容忍度有所提高。微观结构分析表明，增强纤维-基质结合，抑制分层，减少热膨胀，以及优异的导热性，在耦合载荷下共同保持结构完整性。有限元模拟为实验结果提供了数值验证，捕捉了高应变率载荷下界面的剥离和破坏演化过程。高应变率和高温载荷下的强度保持、能量吸收和热稳定性方面的综合优势，建立了一种混合界面设计框架，直接解决了碳纤维复合材料在极端环境下长期存在的脆弱性，为航空航天、国防和极端环境应用提供了下一代热保护系统。

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引用次数: 0

Functional Z-pins reinforced 3D printed lattice with large angular electromagnetic wave absorption 功能z针增强3D打印晶格，具有大角度电磁波吸收

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-19 DOI: 10.1016/j.compscitech.2026.111526

Zhikun Zhang, Weijun Zhu, Ning Wang, Zhaoyu Ti, Tianjia Huang, Dongsheng Li

To enhance both the mechanical properties and electromagnetic wave absorption performance of lightweight lattice structures, this study proposes a functional Z-pins reinforcement approach. Carbon fiber reinforced composite prepreg filaments are arranged in a pyramidal configuration and embedded within the interior of a 3D-printed lattice structure, thereby activating the spoof surface plasmon polariton (SSPP) mode inherent to the design. Simulation and experimental findings indicate that, when the incident angles reach up to 70°, the absorption performance is significantly improved, and the absorptivity remains above 80 % within the frequency range of 12.5–18 GHz. Furthermore, by incorporating carbon fiber composite filaments in the vertical direction, the compressive strength of the lattice structure increases by approximately 14 % compared to a pure resin-based counterpart. Owing to its superior mechanical integrity and electromagnetic absorption capabilities, the proposed lightweight lattice structure exhibits strong potential for multifunctional applications intelattice load-bearing and wave-absorbing functionalities.

为了提高轻质点阵结构的力学性能和电磁波吸收性能，本研究提出了一种功能z针增强方法。碳纤维增强复合材料预浸长丝以锥体结构排列并嵌入3d打印晶格结构的内部，从而激活该设计固有的欺骗表面等离子体激元（SSPP）模式。仿真和实验结果表明，当入射角达到70°时，吸收性能得到明显改善，在12.5 ~ 18 GHz频率范围内，吸收率保持在80%以上。此外，通过在垂直方向上加入碳纤维复合材料长丝，晶格结构的抗压强度比纯树脂基材料增加了约14%。由于其优异的机械完整性和电磁吸收能力，所提出的轻质晶格结构在多功能应用中表现出强大的潜力，如承载和吸波功能。

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引用次数: 0

Magnetically assisted vertical alignment of boron nitride nanosheets via viscosity modulation for thermal interface materials with low thermal resistance 低热阻热界面材料粘度调节磁辅助氮化硼纳米片垂直排列

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-12 DOI: 10.1016/j.compscitech.2026.111524

Qi Huang , Xiaohui Sun , Shiyi Wen , Fang Wang , Peiying Ma , Bingxin Liu , Wensheng Gao , Yongxiao Bai

The rapid advancement of the electronics industry has intensified the demand for high-performance thermal interface materials (TIMs). Leveraging the ultrahigh in plane thermal conductivity of boron nitride nanosheets (BNNS) as ideal fillers, external magnetic alignment techniques can induce their vertical arrangement in polymer matrices to establish efficient thermal pathways for high-performance TIMs. However, the sharp increase in viscosity of the composite system at high filler loadings severely restricts the directional alignment of BNNS within flexible substrates. In this study, we proposed a novel viscosity-modulation strategy for magnetic alignment that balances the magnetic driving force and viscous resistance, achieving highly precise orientation of BNNS in a silicone elastic (SE) matrix even at high filler content. The resulting composites exhibit a significantly enhanced through-plane thermal conductivity of 1.97 W m⁻¹· K⁻¹ and ultralow thermal contact resistance of 0.011 in²·K ⁻¹ W^-1. Concurrently, the composite demonstrates excellent electrical insulation, high thermal stability, and resistance to atomic oxygen irradiation, indicating promising potential for intelligent thermal management applications in high-power electronic devices.

随着电子工业的快速发展，对高性能热界面材料（TIMs）的需求不断增加。利用氮化硼纳米片（BNNS）超高的平面热导率作为理想的填料，外磁定向技术可以诱导其在聚合物基质中的垂直排列，为高性能TIMs建立有效的热通道。然而，在高填料负载下，复合体系粘度的急剧增加严重限制了BNNS在柔性基板中的定向对准。在这项研究中，我们提出了一种新的粘度调制策略来平衡磁性驱动力和粘性阻力，即使在高填料含量的硅酮弹性（SE）基质中也能实现BNNS的高精度定向。复合材料的通平面导热系数为1.97 W m−1·K−1，接触热阻为0.011 in2·K−1 W-1。同时，该复合材料具有优异的电绝缘性、高热稳定性和耐原子氧辐照性，在大功率电子器件的智能热管理应用中具有广阔的潜力。

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引用次数: 0

Image-driven analysis of tensile mechanical properties of 2.5D woven composites 2.5D编织复合材料拉伸力学性能的图像驱动分析

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-24 DOI: 10.1016/j.compscitech.2026.111538

Yong Liao , Zhangwen Wang , Bing Wang , Guodong Fang , Songhe Meng

2.5D woven composites have the complex meso-structures owing to the mutual compaction between fiber bundles, where the fiber bundles have the significant variations in local fiber distribution and fiber volume fraction along the fiber bundle paths. These complex microstructures directly affect the mechanical performances of the composites. An image-driven surrogate modeling approach is developed to construct meso-scale finite element (FE) models analyzing transverse tensile failure of fiber bundles. The transverse stress distributions in fiber bundles are rapidly predicted by the surrogate model, which are further used to correct the matrix stress concentration factor. The internal fiber bundle states of the 2.5D woven composites are studied by Micro-CT characterization, which can be recognized as the input to rapidly determine the transverse mechanical properties of the local fiber bundles. A refined FE model of the 2.5D woven composites combining the local variation mechanical properties of the fiber bundles can successfully reproduce the progressive damage evolution, identifying the main damage localized in bundle interlacing and bending regions, which are also validated by the tensile experiment.

2.5D机织复合材料由于纤维束之间的相互压实而具有复杂的细观结构，其中纤维束在纤维束路径上的局部纤维分布和纤维体积分数有显著的变化。这些复杂的微观结构直接影响复合材料的力学性能。提出了一种图像驱动的替代建模方法，用于构建分析纤维束横向拉伸破坏的细观尺度有限元模型。利用替代模型快速预测了纤维束的横向应力分布，并对基体应力集中系数进行了修正。通过Micro-CT表征研究了2.5D编织复合材料内部纤维束状态，并将其识别为快速确定局部纤维束横向力学性能的输入。结合纤维束局部力学性能变化的2.5D编织复合材料精细化有限元模型能够成功重现纤维束的渐进损伤演化过程，识别出主要损伤集中在纤维束交织区和弯曲区，并通过拉伸实验验证了这一结论。

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引用次数: 0

Numerical and experimental investigation of silk/carbon hybrid composites: Mechanical properties and progressive damage 丝/碳复合材料的数值和实验研究：力学性能和渐进损伤

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-17 DOI: 10.1016/j.compscitech.2026.111523

Zheng Zhang , Tianchao Huang , Wenjie Ding , Quanren Zeng , Min Sun , Guang Zhang , Dongyi Li , Helong Wu , Shaofei Jiang

The limited toughness, fracture energy, and elongation of carbon fiber-reinforced composites restrict their broader application. In contrast, silk fiber exhibit high toughness and ductility, making them attractive candidate for hybrid reinforcement. In this work, silk/carbon hybrid fiber reinforced composite were fabricated using continuous natural fiber 3D printing followed by vacuum-assisted hot pressing. Mechanical tests combined with scanning electron microscopy was employed to evaluate the effect of silk fiber content on the mechanical properties and damage mechanisms of hybrid fiber reinforced composite. The incorporation of silk fiber enhanced the Mode I interlaminar fracture toughness by 62.32 %. With higher silk fiber fractions, tensile fracture energy and flexural ultimate strain improved by 153 % and 182 %, respectively. A finite element model based on the Hashin failure criterion was developed to accurately predicted the progressive damage, and the numerical simulation showed good agreement with experimental results. These findings demonstrate that hybridizing carbon with silk fibers provides a viable pathway to tailor toughness, ductility and other mechanical properties in composite systems.

碳纤维增强复合材料的韧性、断裂能和伸长率有限，限制了其广泛应用。相比之下，丝纤维表现出高韧性和延展性，使其成为混杂增强材料的有吸引力的候选者。在本研究中，采用连续的天然纤维3D打印，然后真空辅助热压，制备了丝/碳混杂纤维增强复合材料。采用力学试验与扫描电镜相结合的方法，研究了丝纤维含量对混杂纤维增强复合材料力学性能和损伤机理的影响。丝纤维的掺入使I型层间断裂韧性提高了62.32%。随着丝纤维含量的增加，拉伸断裂能和弯曲极限应变分别提高了153%和182%。建立了基于Hashin破坏准则的有限元模型，准确预测了渐进性损伤，数值模拟结果与试验结果吻合较好。这些发现表明，碳与丝纤维的杂交为复合材料的韧性、延展性和其他机械性能提供了一条可行的途径。

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引用次数: 0

Water flow-driven piezo-catalysis of porous BTO-PVDF films: Balancing softness and piezoelectric response 水驱动的多孔BTO-PVDF膜的压电催化：平衡柔软性和压电响应

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

Composites Science and Technology

Pub Date : 2026-04-12 Epub Date: 2026-01-20 DOI: 10.1016/j.compscitech.2026.111527

Yarong Wang , Zhiyong Liu , Kun Guo , Bing Xie , Houyang Chen , Pu Mao , Xiaoping Zhou

To meet the urgent demand for efficient and flexible catalysts in water flow-driven environments such as pipelines and rivers, an inorganic/organic based porous composite piezoelectric film was designed and prepared. By introducing an internal porous structure, the flexible deformation ability of BaTiO₃-Polyvinylidene fluoride (BTO-PVDF) films was significantly improved while maintaining piezoelectric activity, effectively overcoming the bottleneck of traditional inorganic/organic composites that were difficult to balance piezoelectricity and softness. Guided by electromechanical coupling theory, the BTO volume fraction in the PVDF matrix was optimized to 10 %, achieving maximal synergy between piezoelectric response and softness. The porous BTO-PVDF thin-film catalyst exhibited dual-functional performance in both dye degradation and bacterial inactivation. Under ultrasonic irradiation, the degradation rate of Rhodamine B (RhB) dye wastewater was achieved for 97.5 %, accompanying by stable catalytic activity over repeated cycles. The antibacterial properties reached more than 96.6 % against Escherichia coli within 30 min. Particularly importantly, in a simulated water flow circulation device, the porous BTO-PVDF film maintained a degradation efficiency of 69.2 % for RhB over a 12 h period, fully demonstrating its ability to directly utilize natural water flow. Free radical trapping experiments clarified that the main active species were •O₂⁻ and •OH radicals in the catalytic process. This design strategy of synergistically optimizing piezoelectricity and softness through porous composites provides a new way to develop efficient water purification technologies based on water flow.

为了满足管道和河流等水流驱动环境对高效柔性催化剂的迫切需求，设计并制备了无机/有机基多孔复合压电薄膜。通过引入内部多孔结构，batio3 -聚偏氟乙烯（BTO-PVDF）薄膜在保持压电活性的同时，柔性变形能力得到显著提高，有效克服了传统无机/有机复合材料难以平衡压电性和柔软性的瓶颈。以机电耦合理论为指导，优化了PVDF基体中BTO体积分数为10%，实现了压电响应与柔软度的最大协同作用。多孔BTO-PVDF薄膜催化剂具有降解染料和灭活细菌的双重功能。超声辐照对罗丹明B （Rhodamine B, RhB）染料废水的降解率为97.5%，且在重复循环中具有稳定的催化活性。30 min内对大肠杆菌的抑菌率达96.6%以上。特别重要的是，在模拟水流循环装置中，多孔BTO-PVDF膜在12 h的时间内对RhB的降解效率保持在69.2%，充分证明了其直接利用自然水流的能力。自由基捕获实验表明，在催化过程中，活性自由基主要为•O2−和•OH自由基。这种通过多孔复合材料协同优化压电性和柔软性的设计策略为开发基于水流的高效水净化技术提供了新的途径。

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引用次数: 0