Composites Science and Technology最新文献_第7页

Enhancing CAI strength via ultra-thin/thick ply gradient design: Inhibiting impact delamination and inducing damage competition 通过超薄/厚厚度梯度设计增强CAI强度：抑制冲击分层和诱导损伤竞争

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-03-01 Epub Date: 2025-12-10 DOI: 10.1016/j.compscitech.2025.111485

Xiaofang Zhang , Yanan Yuan

{"title":"Enhancing CAI strength via ultra-thin/thick ply gradient design: Inhibiting impact delamination and inducing damage competition","authors":"Xiaofang Zhang , Yanan Yuan","doi":"10.1016/j.compscitech.2025.111485","DOIUrl":"10.1016/j.compscitech.2025.111485","url":null,"abstract":"<div><div>Traditional thick-ply composites exhibit significant susceptibility to delamination under impact loading, presenting critical challenges to higher mechanical performance. Superior delamination resistance of ultra-thin-ply composites has been proven. We have attempted for the first time to conduct low-velocity impact (LVI) and compression-after-impact (CAI) test using ultra-thin-ply layer under thickness gradient and hybrid design, which is expected to inhibit impact delamination and induced damage competition mechanism, thereby improving CAI strength. Experimental results have proven that the gradient structure with ultra-thin-ply effectively reduces the delamination risk under LVI test and the energy dissipated mechanism transformation has been observed. Compared with thick-ply laminates dominated by delamination, the gradient structure exhibits increased energy distribution for fiber fracture and and the ultimate failure mode is the competition mode between delamination and fiber fracture. Notably, the gradient design imparts more comprehensive mechanical properties to FG-43211234 (a thickness gradient design incorporating four distinct ply thicknesses), manifested in smaller impact depths and superior CAI strength. Furthermore, this study elucidates the damage mechanism of CAI performance: uniform-ply composites exhibit single damage control, with thin-ply structure mainly experiences kink-band failure, while thick-ply structure is primarily characterized by delamination failure. The gradient structure exhibits a damage mechanism competition between kink-band and delamination. The thickness gradient design significantly improves damage tolerance by impeding through-thickness damage propagation, thereby offering enhanced design possibilities and approaches for applications demanding superior damage resistance.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111485"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Boosting high-temperature capacitive energy storage in PEI-based composite dielectric using dual-functional fluorinated graphene 利用双功能氟化石墨烯增强pei基复合电介质的高温电容储能

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.compscitech.2025.111495

Rui Yang , Zhongyao Chai , Yi Ru , Wenqi Zhang , Sidi Fan , Yaping Cui , Fangcheng Lv , Xiang Yu

{"title":"Boosting high-temperature capacitive energy storage in PEI-based composite dielectric using dual-functional fluorinated graphene","authors":"Rui Yang , Zhongyao Chai , Yi Ru , Wenqi Zhang , Sidi Fan , Yaping Cui , Fangcheng Lv , Xiang Yu","doi":"10.1016/j.compscitech.2025.111495","DOIUrl":"10.1016/j.compscitech.2025.111495","url":null,"abstract":"<div><div>Polymer-based thin-film capacitors have emerged as essential components in advanced energy generation and storage systems. For high-temperature applications, conventional polymers, such as polyetherimide (PEI), still face a critical challenge: a surge in leakage current at high temperatures, which degrades both discharge efficiency (<em>η</em>) and discharge energy density (<em>U</em><sub>d</sub>). Here, we report on the development of PEI-based composite dielectrics reinforced with fluorinated graphene (F-gr), exhibiting remarkable high-temperature energy storage performance. F-gr plays a dual-functional role: acting as a “chain binder” to form an electrostatic cross-linking network with the PEI chains, thereby restricting thermally activated segment motion and reducing leakage current; serving as an interfacial trapping center that further minimizes leakage current to levels one order of magnitude lower than that of the PEI film. At an optimized doping ratio of 0.3 wt%, the composite film achieves a maximum <em>U</em><sub>d</sub> of 6.31 J cm<sup>−3</sup> at 150 °C and 4.43 J cm<sup>−3</sup> at 200 °C. At an efficiency above 90 %, the 0.3 wt% film retains a <em>U</em><sub>d</sub> of 5.32 J cm<sup>−3</sup> at 150 °C and 3.18 J cm<sup>−3</sup> at 200 °C, representing 127.35 % and 825.29 % enhancements, respectively, compared to the PEI film. Furthermore, its excellent long-term operational stability and scalability potential highlight its feasibility for practical applications.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111495"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Processability, mechanical and high-temperature tribological properties of h-BN/PEEK self-lubricating composites manufactured via laser powder bed fusion 激光粉末床熔合制备的h-BN/PEEK自润滑复合材料的加工性能、力学性能和高温摩擦学性能

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-03-01 Epub Date: 2025-12-27 DOI: 10.1016/j.compscitech.2025.111501

Yazhou Li, Lingyun Jian, Hanfei Dai, Hengrui Zhao, Boyu Chen, Qiang Yang, Fu Wang, Dichen Li

{"title":"Processability, mechanical and high-temperature tribological properties of h-BN/PEEK self-lubricating composites manufactured via laser powder bed fusion","authors":"Yazhou Li, Lingyun Jian, Hanfei Dai, Hengrui Zhao, Boyu Chen, Qiang Yang, Fu Wang, Dichen Li","doi":"10.1016/j.compscitech.2025.111501","DOIUrl":"10.1016/j.compscitech.2025.111501","url":null,"abstract":"<div><div>Polyether-ether-ketone (PEEK) motion components face significant challenges related to complex structural fabrication and high-temperature lubrication in aerospace and automotive engineering. Additive manufacturing of PEEK-based self-lubricating composites provides an effective solution to these issues. In this study, hexagonal boron nitride (h-BN) was incorporated into PEEK and fabricated via laser powder bed fusion (LPBF) to enhance its mechanical and high-temperature tribological performance. The incorporation of h-BN improves the powder flowability and packing efficiency and promotes the crystallization, thermal conductivity, and mechanical reinforcement of PEEK. The 10 wt% h-BN/PEEK self-lubricating composite exhibits the best overall performance, achieving a compressive strength of 190 MPa, a tensile strength of 90.5 MPa, and a hardness improvement of 11 % compared with pure PEEK. Moreover, the same formulation demonstrated exceptionally low coefficients of friction and wear rates across both ambient and elevated temperatures (100–200 °C), with reductions exceeding 65 % relative to pure PEEK. It is attributed to the easy-shear nature of the layered h-BN and the formation of a continuous transfer film, while molecular dynamics simulations confirm that h-BN promotes interfacial slip, structural stability, and efficient heat dissipation in the composite. This work provides new insights into the design and LPBF fabrication of high-performance polymer-based self-lubricating composites for high-temperature applications in extreme environments.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111501"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Development of ultra-strong and high barrier polymer membrane with nacre-mimetic structure via sequential pulse cold rolling rheological strategy 采用序贯脉冲冷轧流变策略开发具有纳米结构的超高强度高阻隔聚合物膜

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.compscitech.2025.111487

Senhao Zhang, Tongkun Wang, Cong Ye, Jincai Cheng, Huanhuan Zhang, Jin-Ping Qu

{"title":"Development of ultra-strong and high barrier polymer membrane with nacre-mimetic structure via sequential pulse cold rolling rheological strategy","authors":"Senhao Zhang, Tongkun Wang, Cong Ye, Jincai Cheng, Huanhuan Zhang, Jin-Ping Qu","doi":"10.1016/j.compscitech.2025.111487","DOIUrl":"10.1016/j.compscitech.2025.111487","url":null,"abstract":"<div><div>Following the COVID-19 pandemic, the demand for materials with superior barrier and mechanical properties has surged. Mechanical processing techniques have been proven effective in facilitating the self-assembly of the nacre-mimetic structure, significantly enhancing the properties of polymer materials. However, these methods often lead to non-uniform strain, which limits the potential reinforcement effects. This study proposes a sequential pulse cold rolling rheological strategy. By applying multiple small-amplitude loads, the relaxation behavior of molecular chains is effectively regulated to minimize non-uniform strain during mechanical processing, thereby enabling the formation of a more uniform nacre-mimetic structure under cold solid-state. The optimized cold-rolled membrane demonstrated an oxygen improvement factor (BIF) of 5.8 and a tensile strength of 59.0 MPa, representing enhancements of 480 % and 470.3 %, respectively, compared to that of the control. The membranes also showed excellent biocompatibility and achieved a 60.24 % inhibition rate against <em>Candida albicans</em>, compared to 24.09 % for the control. In vivo studies demonstrated that by 14 days, the cr-2 achieved a healing rate of 93.05 %, significantly higher than that of the control (83.10 %) and blank (58.34 %). This approach provides a general strategy for mitigating non-uniform strain during machining processes, offering broad applicability in material design and processing.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"275 ","pages":"Article 111487"},"PeriodicalIF":9.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Acoustic emission analysis of the interlaminar resistance increase during Mode I delamination with fibre bridging in composite laminates 复合材料层合板纤维桥接I型分层时层间阻力增加的声发射分析

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-02-08 Epub Date: 2025-11-10 DOI: 10.1016/j.compscitech.2025.111446

Liaojun Yao , Zelin Chen , Zixian He , Stepan V. Lomov , Valter Carvelli , Sergei B. Sapozhnikov , Yonglyu He , Wensong Zhou , Yu Feng , Liyong Jia

{"title":"Acoustic emission analysis of the interlaminar resistance increase during Mode I delamination with fibre bridging in composite laminates","authors":"Liaojun Yao , Zelin Chen , Zixian He , Stepan V. Lomov , Valter Carvelli , Sergei B. Sapozhnikov , Yonglyu He , Wensong Zhou , Yu Feng , Liyong Jia","doi":"10.1016/j.compscitech.2025.111446","DOIUrl":"10.1016/j.compscitech.2025.111446","url":null,"abstract":"<div><div>This study investigates the damage mechanisms and associated interlaminar toughness (<em>G</em><sub>IC</sub>) increase in Mode I delamination with large-scale fibre bridging for a carbon fibre/epoxy composite. Using Acoustic Emission (AE), Wavelet Packet Transform (WPT), and scanning electron microscopy, four damage modes were identified: matrix cracking, interface debonding, fibre pullout and fibre breakage. These modes are combined in the fibre bridging process. Cluster analysis of AE signals correlated each mode to a specific AE signature. The AE energy rate (AEER), defined as the cumulative AE energy per unit of crack propagation length, revealed that fibre pullout, with an AEER at least an order of magnitude higher than other modes, is the dominant toughening mechanism for <em>G</em><sub>IC</sub> increase. Matrix cracking and interface debonding have a moderate effect, whereas fibre breakage has little effect on the <em>G</em><sub>IC</sub> increase. The magnitude of <em>G</em><sub>IC</sub> during delamination propagation also correlates with the instantaneous cumulative absolute energy per AE counts (<em>d</em>(AEE)/<em>d</em>(Counts)), defined as the ratio of the differential of cumulative AE absolute energy to the differential of cumulative counts. This ratio increases with delamination growth and finally stabilizes. These correlations provide a basis for evaluating damage mechanisms and designing composite toughening strategies.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"274 ","pages":"Article 111446"},"PeriodicalIF":9.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

An improved and complete closed-form solution for the mixed mode bending test for delamination in composite laminates 复合材料层合板分层混合模弯曲试验的一种改进的完全封闭解

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-02-08 Epub Date: 2025-11-26 DOI: 10.1016/j.compscitech.2025.111463

Bo Wang, Zhenmin Zou

{"title":"An improved and complete closed-form solution for the mixed mode bending test for delamination in composite laminates","authors":"Bo Wang, Zhenmin Zou","doi":"10.1016/j.compscitech.2025.111463","DOIUrl":"10.1016/j.compscitech.2025.111463","url":null,"abstract":"<div><div>Most existing closed-form solutions for the Mixed-Mode Bending (MMB) test, used to investigate the delamination behaviour in laminated composites, are limited to cases where the delamination length <em>a</em> is less than the half-span <em>L</em> of the specimen. More critically, since these solutions are typically derived using beam theory, the predicted mode I and mode II energy release rates become increasingly inaccurate as the delamination approaches the specimen's mid-span. The few available solutions for delamination length <em>a</em> > <em>L</em> are either erroneous or significantly inaccurate. In this study, a complete closed-form solution is developed using a sub-laminated beam model based on first order shear deformation beam theory. The accuracy of the solution is validated through comparison with results obtained from the virtual crack closure technique and cohesive zone model simulations, using 2D finite element analysis. The proposed formulation enables accurate evaluation of energy release rates for a complete delamination length range (<em>a</em> < <em>L</em> and <em>a</em> ≥ <em>L</em>). The solution is also applicable to thick specimens with cross-ply layups. Potentially, this work may help pave the way for permitting delamination propagation beyond the mid-span in the MMB test—an approach that is currently not recommended by the ASTM standard.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"274 ","pages":"Article 111463"},"PeriodicalIF":9.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Unraveling the interfacial hydrogen bond network mechanism in carbon fiber/polyamide composites: A cross-scale investigation of carbon fiber with different roughness for interface optimization 揭示碳纤维/聚酰胺复合材料界面氢键网络机制：不同粗糙度碳纤维界面优化的跨尺度研究

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-02-08 Epub Date: 2025-11-20 DOI: 10.1016/j.compscitech.2025.111453

Rui Zhang , Jieying Zhi , Lijuan Cao , Liye Yuan , Xiaodong Wen , Xingchen Liu , Kuan Lu , Xiaoxuan Lyu , Yu Yang

{"title":"Unraveling the interfacial hydrogen bond network mechanism in carbon fiber/polyamide composites: A cross-scale investigation of carbon fiber with different roughness for interface optimization","authors":"Rui Zhang , Jieying Zhi , Lijuan Cao , Liye Yuan , Xiaodong Wen , Xingchen Liu , Kuan Lu , Xiaoxuan Lyu , Yu Yang","doi":"10.1016/j.compscitech.2025.111453","DOIUrl":"10.1016/j.compscitech.2025.111453","url":null,"abstract":"<div><div>The interfacial properties of carbon fiber-reinforced thermoplastics are governed by carbon fiber surface characteristics. While the interfacial mechanisms in thermoset composites have been extensively investigated, their thermoplastic counterparts have received comparatively less attention. This research implements a cross-scale methodology integrating macroscopic experiments and molecular dynamics (MD) simulations to elucidate interfacial mechanisms between polyamide 6 (PA6) and two types of carbon fibers with distinct surface states: dry-jet wet-spun carbon fiber (DSCF) and wet-spun carbon fiber (WSCF). Experimental results revealed a notably 55.74 % higher interfacial shear strength (IFSS) in DSCF/PA6 composites (63.20 MPa) compared with WSCF/PA6 systems (40.58 MPa). Through comprehensive microscopic analysis and computational modeling, we found that the enhanced interfacial performance of DSCF stems from its higher concentration of oxygen-containing functional groups, which promote the formation of a more robust hydrogen bond network with PA6 molecules. Building upon this fundamental understanding, we proposed a mesoscale optimization strategy focused on hydrogen bond network regulation. Implementing controlled cooling during composite molding enhanced PA6 crystallinity, leading to a 26.74 % increase in the IFSS of DSCF/PA6 to 80.10 MPa. This work not only clarifies the critical role of hydrogen bonding in interfacial reinforcement but also presents a practical multiscale design framework for DSCF/PA6 composites. The findings offer valuable insights for carbon fiber selection and interface engineering, contributing significantly to the development of advanced carbon fiber-reinforced thermoplastic materials.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"274 ","pages":"Article 111453"},"PeriodicalIF":9.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Development of shear-thickening-gel applied carbon fiber reinforced polymer (SACFRP) with enhanced low-velocity impact resistance 碳纤维增强聚合物（SACFRP）抗剪切增稠凝胶的研制

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-02-08 Epub Date: 2025-11-29 DOI: 10.1016/j.compscitech.2025.111464

Jianchao Zou , Wanrui Zhang , Zhenhao Liao , Yan Shen , Zhibin Han , Lei Yang , Jinglei Yang , Weizhao Zhang

{"title":"Development of shear-thickening-gel applied carbon fiber reinforced polymer (SACFRP) with enhanced low-velocity impact resistance","authors":"Jianchao Zou , Wanrui Zhang , Zhenhao Liao , Yan Shen , Zhibin Han , Lei Yang , Jinglei Yang , Weizhao Zhang","doi":"10.1016/j.compscitech.2025.111464","DOIUrl":"10.1016/j.compscitech.2025.111464","url":null,"abstract":"<div><div>Conventional carbon fiber-reinforced polymers (CFRPs) are highly susceptible to low-velocity impact (LVI) from sharp objects due to their inherent brittleness. To address this critical limitation, an innovative shear thickening gel (STG) was incorporated into CFRP through a bespoke fabrication process, resulting in the STG-applied CFRP (SACFRP). LVI tests revealed that specific impact strength of the SACFRP increased significantly by 267 % compared to the reference CFRP fabricated with the same carbon fibers and epoxy resin but without STG. Moreover, the SACFRP achieved the specific impact strength of 202 J m/kg, substantially exceeding that of other representative carbon or glass fiber-reinforced polymers. Damage analysis and Timoshenko's theoretical study highlighted distinct failure mechanisms between the SACFRP that exhibited thin-plate elastic flexure and the CFRP that experienced brittle impact failure under LVI. Additionally, ultrasonic C-scan results demonstrated enlarged effective impact-resistant area in the SACFRP due to the viscoelasticity and shear-thickening behavior of the integrated STG, facilitating energy dissipation and reducing brittleness of the composite. In summary, this work presents the manufacturing method of an innovative SACFRP composite and demonstrates its outstanding impact resistance, marking the significant advancement in development of high-performance composites.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"274 ","pages":"Article 111464"},"PeriodicalIF":9.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Microscopic mechanism of interfacial effects on mechanical properties of polymer nanocomposites 界面效应对聚合物纳米复合材料力学性能影响的微观机理

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-02-08 Epub Date: 2025-11-21 DOI: 10.1016/j.compscitech.2025.111458

Xiaobin Liang , Toru Kobayashi , Tatsuya Endo , Makiko Ito , Ken Nakajima

{"title":"Microscopic mechanism of interfacial effects on mechanical properties of polymer nanocomposites","authors":"Xiaobin Liang , Toru Kobayashi , Tatsuya Endo , Makiko Ito , Ken Nakajima","doi":"10.1016/j.compscitech.2025.111458","DOIUrl":"10.1016/j.compscitech.2025.111458","url":null,"abstract":"<div><div>Interfaces play a crucial role in the mechanical properties and deformation behavior of polymer nanocomposites (PNCs). In this study, we successfully characterized the deformation behavior and stress distribution of the interface and polymer matrix at the nanoscale using the nanomechanical technique of atomic force microscopy (AFM), revealing the microscopic mechanism of the interface effects on the mechanical properties of PNCs. By comparing the interfaces of different fillers and styrene-butadiene rubber (SBR), we found that silane coupling agent-treated silica (SiO<sub>2</sub>) could greatly increase the interface thickness and strength. This enhancement was not limited to the interface itself but also restricted the movement of molecular chains nearby, thereby increasing the modulus of the surrounding matrix. When the material was deformed, the high-strength interface could bear a large amount of stress, while the stresses in composites with low interfacial strength were mainly borne by the polymer matrix. This microscopic stress visualization technique enabled a deeper understanding of the correlation between the micromechanical behavior and macroscopic mechanical properties of the interface and matrix. In addition, through the quantitative analysis of the stress distribution of each phase, we proposed a multiphase composite model to describe the deformation behavior of filled rubber. We used the parallel model and the series model to calculate the composite stress of different types of filler PNCs, further reveals the importance of the interface for the mechanical properties of PNCs. Our results provided new insights for guiding the design and development of PNCs and for the study of composite interfaces.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"274 ","pages":"Article 111458"},"PeriodicalIF":9.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

High-performance epoxy composites based on 3D interconnected hybrid filler network interface engineering: Synergistic enhancement of thermal and mechanical properties 基于三维互联杂化填料网络界面工程的高性能环氧复合材料：热性能和力学性能的协同增强

IF 9.8 1区材料科学

Composites Science and Technology Pub Date : 2026-02-08 Epub Date: 2025-11-12 DOI: 10.1016/j.compscitech.2025.111436

Shuaishuai Zhou , Peiwen Sun , Mingxin Zhong , Shaohua Li , Peng Zhang , Meihong Liao , Peng Ding , Jingjie Dai

{"title":"High-performance epoxy composites based on 3D interconnected hybrid filler network interface engineering: Synergistic enhancement of thermal and mechanical properties","authors":"Shuaishuai Zhou , Peiwen Sun , Mingxin Zhong , Shaohua Li , Peng Zhang , Meihong Liao , Peng Ding , Jingjie Dai","doi":"10.1016/j.compscitech.2025.111436","DOIUrl":"10.1016/j.compscitech.2025.111436","url":null,"abstract":"<div><div>The exponential advancement of artificial intelligence technologies has driven a corresponding surge in chip power density. Effective heat dissipation is the key factor restricting their safety and reliability thereby intensifying the demand for advanced thermal management materials. Nevertheless, persistent trade-offs in thermomechanical properties constitute a fundamental bottleneck in the development of high-performance thermal management materials. In this work, epoxy resin composites with three-dimensional (3D) interconnected hybrid filler networks were fabricated by a multiscale cooperative strategy of “freeze-drying, high-temperature carbonization, and in-situ impregnation”. Based on the interface engineering strategy, the morphology synergy between graphene nanosheets and hydroxylated boron nitride nanosheets was utilized to construct an interconnected 3D network. Combined with high-temperature carbonization to eliminate network defects, the synergistic optimization of thermal conductivity and mechanical properties of epoxy composites was successfully achieved. The prepared epoxy composite exhibits an exceptional through-plane thermal conductivity of 3.10 W m<sup>−1</sup> K<sup>−1</sup> at a low hybrid filler content of 4.65 wt%, achieving a remarkable 1326 % improvement over pristine epoxy. Notably, it retains excellent compressive strength (204 MPa), indicating balanced thermomechanical properties. This work successfully overcomes the long-standing thermomechanical trade-off limitation in composite materials, offering novel design guidelines for next-generation high-efficiency thermal management composites.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"274 ","pages":"Article 111436"},"PeriodicalIF":9.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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