Composites Part A: Applied Science and Manufacturing最新文献_第10页

Size effect of natural fibre reinforcement on mechanical performance for the development of thin bio-composite laminates: do fibre bundles represent a limitation? 天然纤维增强对薄生物复合材料层压板机械性能的尺寸效应：纤维束是否代表一种限制？

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-13 DOI: 10.1016/j.compositesa.2025.109245

Wilfried Troalen , Antoine Le Duigou , Christophe Baley

{"title":"Size effect of natural fibre reinforcement on mechanical performance for the development of thin bio-composite laminates: do fibre bundles represent a limitation?","authors":"Wilfried Troalen , Antoine Le Duigou , Christophe Baley","doi":"10.1016/j.compositesa.2025.109245","DOIUrl":"10.1016/j.compositesa.2025.109245","url":null,"abstract":"<div><div>As a consequence of the scale effect, thinner laminates generally exhibit fewer defects than thicker ones. However, the use of natural fibres in thinner composites (approximately 500 µm), such as composite membranes, remains limited due to the inherent geometric and mechanical variability of natural fibres, which significantly affect properties at reduced thicknesses.</div><div>This study investigates the effect of laminate thickness on the longitudinal tensile properties of unidirectional flax/PPMA biocomposites, with thicknesses ranging from 220 µm to 1778 µm.</div><div>Cross-sectional analyses examine changes in reinforcement distribution and the degree of flax fibre individualisation, specifically, whether fibres are dispersed as elementary fibres or retained in bundles. Strain fields are analysed using Digital Image Correlation (DIC) during tensile tests to localise high-strain regions.</div><div>Results show that when flax fibre bundles dominate the microstructure, mechanical performance decline. In contrast to conventional expectations of the scale effect, there appears to be a critical thickness threshold (approximately 550 µm), below which tensile properties decline. At the lowest tested thickness, tensile performance decreased by up to 20 % relative to the maximum. Back-calculated laminate properties closely match those of the bundles, indicating that conventional scale effect theory does not adequately reflect the heterogeneous structure of flax fibre bundles, and must be reconsidered for natural fibre-reinforced biocomposites. This study highlights the relevance of mechanical characterisation at the final object scale rather than at the norm scale as it exhibits a different behaviour. Undermined by the increased heterogeneity in reinforcement structure mainly dependant on bundles for their mechanical behaviour.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109245"},"PeriodicalIF":8.1,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144879527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation for squeeze flow behaviour of carbon fibre sheet moulding compound 碳纤维薄板成型复合材料挤压流动特性的数值模拟

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-13 DOI: 10.1016/j.compositesa.2025.109241

Hao Yuan , Michael Auinger , Muhammad Khan , Connie Qian

{"title":"Numerical simulation for squeeze flow behaviour of carbon fibre sheet moulding compound","authors":"Hao Yuan , Michael Auinger , Muhammad Khan , Connie Qian","doi":"10.1016/j.compositesa.2025.109241","DOIUrl":"10.1016/j.compositesa.2025.109241","url":null,"abstract":"<div><div>Squeeze flow is one of the main deformation mechanisms in SMC compression moulding. This paper presents the development of a rate-dependent plasticity model for simulating the squeeze flow behaviour of a carbon fibre SMC under typical compression moulding conditions. The proposed model focused on the compressive stress–strain response of the SMC, taking into account the coefficient of friction at the SMC/mould interface, the apparent compressibility and the strain rate dependency of the SMC. The model was verified using a single-ply SMC squeeze flow simulation, where the predicted results of compressive force–displacement, the volume change of the SMC, and the in-cavity pressure distributions were compared with the experimental data. The simulation with combined compressibility and pressure-dependent friction gives better prediction in both compressive forces and pressure distribution. Furthermore, a multi-ply squeeze flow simulation was performed to validate the proposed model, and it was found that a more realistic representation of the SMC charge and a more accurate prediction of compressive forces were achieved by modelling the multi-ply charge as separated plies with varying thickness.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109241"},"PeriodicalIF":8.1,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A prepreg-tool slipping model for unidirectional CF/PPS prepreg during hot-stamping process 单向CF/PPS预浸料在热冲压过程中的预浸料-工具滑动模型

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-13 DOI: 10.1016/j.compositesa.2025.109239

Wenwu Zhang , He Liao , Lidong Wang , Xiongqi Peng

{"title":"A prepreg-tool slipping model for unidirectional CF/PPS prepreg during hot-stamping process","authors":"Wenwu Zhang , He Liao , Lidong Wang , Xiongqi Peng","doi":"10.1016/j.compositesa.2025.109239","DOIUrl":"10.1016/j.compositesa.2025.109239","url":null,"abstract":"<div><div>Using a home-made pull-through testing system, the prepreg-tool slipping behavior of unidirectional carbon fiber/polyphenylene sulfide (UD CF/PPS) prepreg in hot-stamping process was investigated. The influences of metal surface, release agent and processing parameters (temperature, normal force and slipping velocity) were systematically studied. Experimental results indicated the presence of two predominant slipping modes: slip-yield and slip-relaxation. In addition, the after-slip residual stress and Stribeck analysis revealed a significant correlation of surface toughness and release agent with prepreg-tool slipping characteristics. Based on the experimental results, a simple phenomenological slipping model was proposed to characterize the prepreg-tool slipping behavior. The model was then integrated into Abaqus/Explicit as a user-defined VFRIC subroutine for the purpose of verification. This research provides theoretical insights and practical guidance for optimizing thermoplastic composite thermoforming processes through prepreg-tool slipping mechanism analysis.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109239"},"PeriodicalIF":8.1,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic interlaminar toughening and strengthening of CF/EP composites via migration-stable PES/CNTs films 迁移稳定的PES/CNTs膜对CF/EP复合材料层间增韧和强化的影响

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-13 DOI: 10.1016/j.compositesa.2025.109240

Yi Xue , Zhuang Huang , Zehao Yang , Jiamei Luo , Yong Liu , Minqiang Jiang , Hui Zhang , Jianyong Yu

{"title":"Synergistic interlaminar toughening and strengthening of CF/EP composites via migration-stable PES/CNTs films","authors":"Yi Xue , Zhuang Huang , Zehao Yang , Jiamei Luo , Yong Liu , Minqiang Jiang , Hui Zhang , Jianyong Yu","doi":"10.1016/j.compositesa.2025.109240","DOIUrl":"10.1016/j.compositesa.2025.109240","url":null,"abstract":"<div><div>In this study, through a targeted experimental approach, polyethersulfone/carbon nanotubes (PES/CNTs) films with variable carbon nanotubes (CNTs) contents were fabricated by the phase inversion approach and employed in carbon fiber/epoxy (CF/EP) composites prepared by the vacuum-assisted resin infusion process to upgrade the toughness of composites. The dissolution of the PES/CNTs films in the epoxy resin was revealed to be controllable, which guaranteed a gradient distribution of polyethersulfone and CNTs between the layers. As observed, the CF/EP composites with PES/CNTs films containing 0.5 phr CNTs provided the optimized mode I fracture toughness with a 120.4% increase in G<sub>IC</sub> compared to the reference. Whereas, the G<sub>IIC</sub> of the composites with PES/CNTs film containing 1.0 phr CNTs was increased by 92.5%. Additionally, observation of the fracture surfaces of mode I and mode II specimens by scanning electron microscopy revealed that PES/CNTs films toughened CF/EP composites via three mechanisms: i) crack deflection and secondary microcracks initiation caused by polyethersulfone microspheres, ii) cracks bridging effect and pull-out from the epoxy matrix of CNTs and iii) CNTs distributed between epoxy matrix and polyethersulfone microsphere led to more energy consumption, which had a synergistic effect. This method overcomes the trade-off between toughness and stiffness in traditional interleaving methods, providing a new approach for the manufacturing of high-performance CF/EP composites.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109240"},"PeriodicalIF":8.1,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One stone three birds: hydrophobic, self-healing and UV-resistant polyurethane composite coating based on FPANI@CeO2 for anti-corrosion applications 一石三鸟：疏水，自修复和抗紫外线聚氨酯复合涂料FPANI@CeO2防腐应用

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-12 DOI: 10.1016/j.compositesa.2025.109236

Yinjie Xu , Yulin Xue , Hongjuan Li , Bangjie Meng , Yingjun Liu , Liang Li , Wangru Wei , Haibo Wang , Shihua Dong

{"title":"One stone three birds: hydrophobic, self-healing and UV-resistant polyurethane composite coating based on FPANI@CeO2 for anti-corrosion applications","authors":"Yinjie Xu , Yulin Xue , Hongjuan Li , Bangjie Meng , Yingjun Liu , Liang Li , Wangru Wei , Haibo Wang , Shihua Dong","doi":"10.1016/j.compositesa.2025.109236","DOIUrl":"10.1016/j.compositesa.2025.109236","url":null,"abstract":"<div><div>In practical applications, the UV resistance of polyurethane coatings is extremely important in addition to the corrosion protection. Fluorinated polyaniline (FPANI) was generated in situ on the surface of F-d@CeO<sub>2</sub> in an acidic environment using phytic acid (PA) as a dopant, and FT-IR, Raman, TG, XRD, and XPS tests showed that the fluorinated polyaniline was chemically bonded to polydopamine. Anti-corrosion experiments showed that the composite coating (PFC5) with the best anti-corrosion properties was when the filler content (FPANI<sub>PA</sub>/F-d@CeO<sub>2</sub>) was 5 wt%. The |Z|0.01 Hz of the PFC5 composite coating remained above 10<sup>8</sup> Ω·cm<sup>2</sup> after 120 d of immersion. Cerium oxide, on the other hand, has the ability to absorb and protect from UV light, and fluorinated polyaniline and polydopamine’s free radical scavenging capabilities can trap the free radicals generated by UV-aging polyurethane and inhibit or block the photo-oxidation reaction of the coating. Therefore, the PFC5 composite coating shows excellent UV resistance, with the lowest photo-oxidation index and carbonyl index after UV aging for 300 h, and maintains excellent corrosion resistance and mechanical properties. At the same time, the tests of POM, EIS and mechanical properties show that the PFC5 composite coating exhibits excellent photothermal self-healing performance, and the coating still maintains good mechanical properties as well as anticorrosion properties before and after self-healing, with a self-healing efficiency of more than 90 %.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109236"},"PeriodicalIF":8.1,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Repeated impact behavior of multifunctional carbon fiber reinforced plastic composites sandwich structures with 3D printed novel rail interlocking core 3D打印新型钢轨联锁芯多功能碳纤维增强塑料复合材料夹层结构的重复冲击行为

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-11 DOI: 10.1016/j.compositesa.2025.109235

Hyun-Ji Rho , Hui-Jin Um , Ji-Hwan Shin , Hak-Sung Kim

{"title":"Repeated impact behavior of multifunctional carbon fiber reinforced plastic composites sandwich structures with 3D printed novel rail interlocking core","authors":"Hyun-Ji Rho , Hui-Jin Um , Ji-Hwan Shin , Hak-Sung Kim","doi":"10.1016/j.compositesa.2025.109235","DOIUrl":"10.1016/j.compositesa.2025.109235","url":null,"abstract":"<div><div>The integration of energy storage function into structural components demands reliable mechanical protection while maintaining consistent electrical performance. This study aims to develop and evaluate multifunctional sandwich structures that can effectively protect batteries while maintaining structural integrity under impact conditions. A novel rail interlocking assembly method was introduced in this study that enables the interchangeability of sandwich structures considering energy storage functions and improved impact resistance. Multifunctional sandwich structures were implemented using 3D-printed corrugated cores with continuous carbon fiber filament, where the complex geometry includes a rail interlocking assembly designed for modular integration. Three different assembly methods (adhesive bonding, mechanical bolting, and an innovative rail system) were applied to fabricate sandwich structures consisting of carbon fiber-reinforced polymer skins and corrugated cores. The drop weight test was conducted on core supported (S) and non-supported (NS) cases to analyze the repeated impact behavior. The rail model exhibited superior mechanical uniformity between S and NS cases, showing only 3.6 % reduction in impact bending stiffness compared to significant degradations of 59.6 % and 36.3 % in adhesive and bolt models, respectively. While the adhesive model showed higher initial strength in supported conditions, its performance was drastically decreased under non-supported conditions, with a 63.1 % reduction in maximum load capacity. In terms of battery protection, the rail model maintained consistent charge–discharge capacity across all impact locations, with variations remaining within 2 %, whereas the bolt model showed 16.5 % greater capacity degradation despite experiencing lower peak loads.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109235"},"PeriodicalIF":8.1,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144879526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constructing multi-scale microstructure via hot rolling treatments of achieving ultra-high strength-ductility synergy of discontinuously reinforced titanium matrix composites 通过热轧处理构建多尺度显微组织，实现非连续增强钛基复合材料的超高强度-延展性协同

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-11 DOI: 10.1016/j.compositesa.2025.109238

Yu Wang , Hongmei Zhang , Xingwang Cheng , Xiaonan Mu , Yufei Li

{"title":"Constructing multi-scale microstructure via hot rolling treatments of achieving ultra-high strength-ductility synergy of discontinuously reinforced titanium matrix composites","authors":"Yu Wang , Hongmei Zhang , Xingwang Cheng , Xiaonan Mu , Yufei Li","doi":"10.1016/j.compositesa.2025.109238","DOIUrl":"10.1016/j.compositesa.2025.109238","url":null,"abstract":"<div><div>Ti60-based composites had broad application prospects in the aerospace high-temperature field due to their excellent specific strength and high-temperature resistance. However, although this type of material demonstrated remarkable strength and plasticity at high temperatures, the synergistic effect between its room-temperature strength and ductility was inevitably disrupted. In this study, an <em>in-situ</em> multi-scale structure strategy, including TiB<sub>w</sub>, La<sub>2</sub>O<sub>3</sub>, and silicide particles was proposed to achieve enhanced room-temperature strength and ductility in Discontinuous reinforced titanium matrix composites (DRTiMCs). The approach involved preparing Ti60-based composites reinforced with 0.1 wt%, 0.2 wt%, 0.3 wt% LaB<sub>6</sub> and 0.02 wt% Si via Field-Assisted Sintering Technique (FAST) combined with Hot Rolling (HR). The results demonstrated that the DRTiMCs with 0.2 wt% LaB<sub>6</sub> exhibited a tensile strength of 1551 MPa and an elongation at break of 10.6 %. Notably, it has broken the traditional doubt that Si in materials would reduce the room-temperature ductility, indicating that a reasonable intergranular silicide design will not affect the comprehensive mechanical properties of DRTiMCs. These findings offered valuable strategies and insights for overcoming the existing challenges in the further development and engineering applications of DRTiMCs within a room-temperature operational environment.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109238"},"PeriodicalIF":8.1,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A stepwise parameter planning methodology for 3D printing of continuous fiber reinforced polymer composites 连续纤维增强聚合物复合材料3D打印的分步参数规划方法

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-10 DOI: 10.1016/j.compositesa.2025.109228

Aodi Yan , Ben Deng , Fangyu Peng , Jiale Yi , Zhijie Li , Jinguo Shen , Rong Yan , Xiaowei Tang

{"title":"A stepwise parameter planning methodology for 3D printing of continuous fiber reinforced polymer composites","authors":"Aodi Yan , Ben Deng , Fangyu Peng , Jiale Yi , Zhijie Li , Jinguo Shen , Rong Yan , Xiaowei Tang","doi":"10.1016/j.compositesa.2025.109228","DOIUrl":"10.1016/j.compositesa.2025.109228","url":null,"abstract":"<div><div>A theoretical framework for parameter planning remains lacking in the 3D printing of continuous fiber reinforced polymer (CFRP) composite. This study develops a stepwise parameter planning methodology for prepreg-resin co-extrusion processes, integrating morphological control with mechanical performance objectives. The relative extrusion coefficient, layer thickness and hatch spacing are taking into account and planned in steps. The relative extrusion coefficient is determined by the target fiber content. The relationship between layer thickness and relative extrusion coefficient was determined through cross-sectional morphological analysis. By introducing the hatch spacing factor, two methods for calculating hatch spacing based on free deposition filament width and multi-filament deposition filament width were proposed and experimentally validated. Furthermore, the influence of process parameters was comprehensively examined through surface and cross-sectional characterization, flexural testing, and interlaminar shear testing. The governing mechanisms were then interpreted by analyzing fiber content, porosity, and fiber bundle integrity. Using the optimized parameter framework, the fabricated specimens exhibited a flexural strength of 243.97 MPa, a flexural modulus of 17.45 GPa, as well as an interlaminar shear strength of 25.58 MPa. This work provides guidance on parameter configuration for high-performance composite 3D printing.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109228"},"PeriodicalIF":8.1,"publicationDate":"2025-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poly(Ionic Liquid) matrices embedded with liquid metal particles: A versatile solution for high-power density thermal management 嵌入液态金属颗粒的聚（离子液体）矩阵：高功率密度热管理的通用解决方案

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-09 DOI: 10.1016/j.compositesa.2025.109221

Jianhui Zeng , Taoying Rao , Ting Liang , Yimin Yao , Chaoyang Wang , Jian-Bin Xu , Liejun Li , Rong Sun

{"title":"Poly(Ionic Liquid) matrices embedded with liquid metal particles: A versatile solution for high-power density thermal management","authors":"Jianhui Zeng , Taoying Rao , Ting Liang , Yimin Yao , Chaoyang Wang , Jian-Bin Xu , Liejun Li , Rong Sun","doi":"10.1016/j.compositesa.2025.109221","DOIUrl":"10.1016/j.compositesa.2025.109221","url":null,"abstract":"<div><div>Amid the global surge in generative AI and the resulting compute revolution, thermal management has emerged to be a pivotal determinant of its success. Innovation in thermal interface materials (TIMs) now represents a strategic frontier in shaping the trajectory of the Fourth Industrial Revolution. Conventional silicone-based TIMs face a performance dilemma comprising thermal cycling-induced interfacial delamination, aging-related increases in interfacial thermal resistance. Building on previous work that introduced poly(ionic liquid)s (PILs) as a novel alternative to silicones, this study further optimizes the molecular structure of PILs. Incorporation of ethoxy groups significantly enhances the mechanical compliance of PIL while maintaining high adhesion strength. Robust hydrogen bonding between ethoxy groups in PIL and liquid metal enables a high loading of 82 vol% without leakage, achieving a thermal conductivity of nearly 5 W m<sup>−1</sup> K<sup>−1</sup>. Meanwhile, strong interfacial adhesion yields a interface contact thermal resistance of 0.74 ± 0.12 × 10<sup>-6</sup> m<sup>2</sup>·K/W between the PIL/LM composite and Si, lower than that of silicone-based TIMs. The noncovalent self-healing of the PIL matrix effectively prevents crack formation in TIMs during aging. This work advances the application of PILs in TIMs and provides strategies for performance optimization, paving the way for their practical deployment as viable matrix alternatives.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109221"},"PeriodicalIF":8.1,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144827481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lamellar MOFs from phosphorus/nitrogen-functionalized ligands for enhanced fire safety and mechanical properties of epoxy resin 磷/氮功能化配体的层状mof增强环氧树脂的防火安全性和力学性能

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-08-08 DOI: 10.1016/j.compositesa.2025.109233

Lian Yin , Yaqin Wu , Yizhi Liu , Keqing Zhou , Jianjian Luo , Bin Yu , Sheng Zhang , Dehong Zhou

{"title":"Lamellar MOFs from phosphorus/nitrogen-functionalized ligands for enhanced fire safety and mechanical properties of epoxy resin","authors":"Lian Yin , Yaqin Wu , Yizhi Liu , Keqing Zhou , Jianjian Luo , Bin Yu , Sheng Zhang , Dehong Zhou","doi":"10.1016/j.compositesa.2025.109233","DOIUrl":"10.1016/j.compositesa.2025.109233","url":null,"abstract":"<div><div>The inherent flammability and brittleness of epoxy resins (EP) impose significant constraints on their application in advanced manufacturing. Herein, this work presented a novel approach to improving the fire protection and mechanical performance of EP by incorporating lamellar metal organic framework architectures (IM-HMOF) derived from phosphorus/nitrogen-based imidazole (IM-HCCP). The IM-HMOF provided dual crosslinking sites through imidazole groups and P=N- heterocyclic structure, which effectively regulated the interfacial interactions with the EP matrix and positively affected the mechanical and thermal properties of EP composites. Specifically, the tensile modulus, tensile strength and elongation at break of EP/IM-HMOF 2.0 were enhanced by 54.8 %, 102.5 % and 47.1 %, respectively, compared with pure EP. Additionally, the addition of IM-HMOF significantly reduced the thermal decomposition rate of the EP matrix and increased char yield, which conferred excellent thermal properties to the EP composites. Notably, the EP/IM-HMOF 2.0 had the lowest fire hazards, with a reduction of 42.4 %, 34.0 %, 40.6 % and 43.5 % in the peak heat release rate, peak smoke production rate, peak CO production rate and peak CO<sub>2</sub> production rate, respectively. This was associated with the barrier effect of lamellar MOFs, as well as the catalytic, radical trapping and combustible dilution effects exerted by the Co-P-N flame retardant system. The present work proposes an innovative strategy at the molecular level to endow EP with both flame retardant and toughening properties, which helps to break the limitations of polymer applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"199 ","pages":"Article 109233"},"PeriodicalIF":8.1,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144827479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0