Composites Science and Technology最新文献

Multiscale synergistic enhancement of hydrothermal durability in NBR through graphene-carbon nanotube architectures 石墨烯-碳纳米管结构对丁腈橡胶热液耐久性的多尺度协同增强

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-11 DOI: 10.1016/j.compscitech.2025.111268

Ruijie Han , Pengfei Zhao , Jiaxin Zhang , Yingyuan Zhan , Yuanrui Shao , Jin Peng

{"title":"Multiscale synergistic enhancement of hydrothermal durability in NBR through graphene-carbon nanotube architectures","authors":"Ruijie Han , Pengfei Zhao , Jiaxin Zhang , Yingyuan Zhan , Yuanrui Shao , Jin Peng","doi":"10.1016/j.compscitech.2025.111268","DOIUrl":"10.1016/j.compscitech.2025.111268","url":null,"abstract":"<div><div>The hydrothermal failure of nitrile rubber (NBR) in geothermal sealing systems remains a critical challenge. This study fabricates graphene (GN)/carbon nanotubes (CNTs) reinforced NBR composites (GN/CNTs-NBR) via solution blending process. Through integrated analysis of water diffusion kinetics, molecular dynamics simulations, and multiscale structural characterization, we elucidate the inhibition mechanism of filler synergistic effects on hydrothermal aging behavior in rubber matrices. Experimental results demonstrate that the GN/CNTs-NBR maintains 21.7 MPa tensile strength after 170 °C/48 h aging, with a 19.3 % improvement over pristine NBR, while reducing the swelling ratio to 13.0 % (19.8 % decrease). Adsorption isotherm analysis reveals that the filler network reduces the Langmuir equilibrium constant (K<sub>L</sub>) by 17.6 % (0.14) with superior model fit (R<sup>2</sup> = 0.98). Molecular dynamics simulations confirm a 32.4 % decrease in water molecular diffusion coefficient (0.69 × 10<sup>−7</sup> cm<sup>2</sup>/s) and 26.3 % enhancement in Van der Waals energy compared to pristine NBR. The restricted molecular chain mobility (34.2 % MSD reduction) and hysteresis behavior analysis (28.5 % energy dissipation decrease) collectively validate the multiscale suppression mechanism of hydrothermal degradation. This work provides new insights for designing extreme-environment rubber seals.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111268"},"PeriodicalIF":8.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271508","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

Mesoscopic damage evolution and rate-dependent porosity prediction model of a composite propellant by in situ X-ray tomography 复合推进剂的细观损伤演化及速率相关孔隙率的原位x射线层析预测模型

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-09 DOI: 10.1016/j.compscitech.2025.111267

Zhelin Dong , Chunguang Wang , Kaining Zhang , Chongpu Zhai , Hanlin Wang , Feifei Zhu , Xiaoying Wang

{"title":"Mesoscopic damage evolution and rate-dependent porosity prediction model of a composite propellant by in situ X-ray tomography","authors":"Zhelin Dong , Chunguang Wang , Kaining Zhang , Chongpu Zhai , Hanlin Wang , Feifei Zhu , Xiaoying Wang","doi":"10.1016/j.compscitech.2025.111267","DOIUrl":"10.1016/j.compscitech.2025.111267","url":null,"abstract":"<div><div>Nitrate ester plasticized polyether (NEPE) composite propellant is widely used in solid rocket motors, serving as the power source of the launch vehicles. The propellant is always subjected to complex mechanical loads during the service, which could induce mesoscopic damage represented by cracks and pores, then eventually reduces carrying capacity of the composite. To illustrate the internal damage evolution mechanisms of NEPE propellant under uniaxial tension, this study developed an <em>in situ</em> X-ray tomography to extract the changing of mesosturctures at different strain rates, then reconstruction of components and pores was conducted to track the damage morphologies’ evolution. As the interfacial debonding preferred to initiate at the large particles, the debonded interfaces would grow into pores with extension of strain, then formed different damage morphologies depending on mesostructures. In addition, the porosity evolution was analyzed at different strain rates, which presented distinct rate-dependent characteristics. By introducing critical debonding stress criteria with a pore evolution model, a rate-dependent porosity prediction model was proposed, and this model provided an excellent agreement with experiment results, which is valuable to damage assessment and integrity analysis of the composite propellant.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111267"},"PeriodicalIF":8.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296950","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

Notch nonlinearities in pseudo-ductile composite laminates: A novel LE/HE sublaminate design 伪延性复合材料层合板的缺口非线性：一种新的LE/HE亚层合板设计

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-09 DOI: 10.1016/j.compscitech.2025.111250

A. Subramani , P. Maimí , J. Cugnoni , R. Amacher , J. Costa

{"title":"Notch nonlinearities in pseudo-ductile composite laminates: A novel LE/HE sublaminate design","authors":"A. Subramani , P. Maimí , J. Cugnoni , R. Amacher , J. Costa","doi":"10.1016/j.compscitech.2025.111250","DOIUrl":"10.1016/j.compscitech.2025.111250","url":null,"abstract":"<div><div>Attempts to achieve pseudo-ductility in quasi-isotropic (QI) thin-ply laminates have traditionally relied on stacking [LE/HE/LE] sublaminates, with LE representing low-elongation and HE high-elongation. However, the increase in effective ply thickness led to reduced unnotched strength. Alternatively, in this study, we define a new sublaminate configuration ([LE/HE]) to minimise the increase in ply-block thickness and compare experimentally such hybrid QI thin-ply laminate with a conventional thin-ply QI (<span><math><mrow><mi>Π</mi><mo>/</mo><mn>4</mn></mrow></math></span>) laminate. The hybrid specimens demonstrated consistent but modest pseudo-ductile properties (ultimate-to-pseudo-yield strength ratio, <span><math><mrow><msub><mrow><mi>σ</mi></mrow><mrow><mi>f</mi></mrow></msub><mo>/</mo><msub><mrow><mi>σ</mi></mrow><mrow><mi>y</mi></mrow></msub></mrow></math></span>=1.1; pseudo-ductile strain, <span><math><msub><mrow><mi>ɛ</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span>=0.3%). Using Digital Image Correlation (DIC) and advanced dark-field X-ray imaging, we detected earlier and more pronounced deviations from linear strain fields in hybrids compared to the reference laminates. The hybrid laminates showed an 11.7% reduction in unnotched strength but a 4% increase in notched strength in Open-Hole Tension (OHT) specimens. Thus, the proposed hybridisation introduces new damage mechanisms facilitating stress redistribution, thereby recovering more nominal strength with a reduced impact on the unnotched strength. Our findings suggest viable approaches to integrate pseudo-ductility into thin-ply laminates whilst preserving the inherent advantages of ply thinness.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111250"},"PeriodicalIF":8.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271509","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

Influence of machining on the bonding strength of CFRP and its enhancement by resin precoating with nanoparticles 加工对CFRP粘接强度的影响及纳米颗粒树脂预涂增强

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-08 DOI: 10.1016/j.compscitech.2025.111265

Ye Yang , Xusheng Chen , Lina Si , Hongjuan Yan , Zhaoliang Dou , Fengbin Liu , Huanxiong Xia

{"title":"Influence of machining on the bonding strength of CFRP and its enhancement by resin precoating with nanoparticles","authors":"Ye Yang , Xusheng Chen , Lina Si , Hongjuan Yan , Zhaoliang Dou , Fengbin Liu , Huanxiong Xia","doi":"10.1016/j.compscitech.2025.111265","DOIUrl":"10.1016/j.compscitech.2025.111265","url":null,"abstract":"<div><div>Carbon fiber-reinforced polymer (CFRP) has been widely used in industry due to its outstanding properties, such as a high strength-to-weight ratio. However, the machined CFRP typically exhibits low bonding strength when joined to metals such as titanium alloys. This paper investigated the influence of machining on the shear strength of CFRP/Ti–6Al–4V joint through single-lap shear (SLS) tests. The microstructures of the machined surfaces were observed, and the failure mechanism was further analyzed. It was found that the tearing and delamination of fibers from the milled CFRP substrate led to the failure under shear stress. The strong cutting force during the milling process caused significant damage to the CFRP fibers in the skin layer, which were more susceptible to delamination under shear. To address this issue, an enhancement method by resin pre-coating (RPC) treatment with MWCNT nanoparticles was proposed, improving the shear strength up to 76 %. Regarding the mechanism, the broken fibers were reinforced by the diluted resin, and the long MWCNT served as a bridge, enhancing the mechanical interlocking.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111265"},"PeriodicalIF":8.3,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242529","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

Thermoelectrically coupled investigation on the sensing capacities of CNT-based nanocomposite temperature sensor across the glass-transition range 基于碳纳米管的纳米复合温度传感器在玻璃化转变范围内传感能力的热电耦合研究

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-07 DOI: 10.1016/j.compscitech.2025.111266

Xiaodong Xia , Jianchen Tang , Juanjuan Zhang , Shen Gong , George J. Weng

{"title":"Thermoelectrically coupled investigation on the sensing capacities of CNT-based nanocomposite temperature sensor across the glass-transition range","authors":"Xiaodong Xia , Jianchen Tang , Juanjuan Zhang , Shen Gong , George J. Weng","doi":"10.1016/j.compscitech.2025.111266","DOIUrl":"10.1016/j.compscitech.2025.111266","url":null,"abstract":"<div><div>Unlike the room-temperature sensing performance, the sensing capacities over a wide temperature measuring range tend to encounter the glass transition temperature. This remains a critical issue for the lightweight CNT-based nanocomposite temperature sensors (CNCTS). In this research, a novel thermoelectrically coupled homogenization theory is developed to investigate this phenomenon. First, an equivalent scheme is adopted for the wavy and bending CNTs. The temperature-dependent electric constitutive relations are obtained with consideration of thermal expansion and variable range hopping. Then, the tunneling effect at the interphase is derived under the temperature-dependent tunneling distance and electron mobility. The progressive evolution of glass-transition process is also determined based on the irreversible thermodynamics. Next, a hierarchical homogenization scheme is utilized to evaluate the temperature-dependent conductivity and sensing capacities of the composite. A temperature-dependent percolation threshold is derived across the glass-transition range. On this basis, the predicted temperature sensing capacities are calibrated with experiments under various CNT volume fractions. It is disclosed that the high absolute values of temperature sensing capacities can be obtained at a low CNT volume fraction. It is also demonstrated that the temperature sensing capacities of CNCTS can be tuned by the microstructural parameters, including CNT aspect ratio, waviness configuration and thermal expansion. This research can provide guidance for optimizing the microstructure of extremely sensitive temperature sensor across the glass-transition range.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111266"},"PeriodicalIF":8.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262614","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

Effective thermal conductivity and elastic modulus of elastomer composites with liquid metal and solid inclusions 含液态金属和固体夹杂物的弹性体复合材料的有效导热系数和弹性模量

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-06 DOI: 10.1016/j.compscitech.2025.111258

Lijun Zhou , Sebastian Bustos-Nuño , Krithika Manohar , Mohammad H. Malakooti

{"title":"Effective thermal conductivity and elastic modulus of elastomer composites with liquid metal and solid inclusions","authors":"Lijun Zhou , Sebastian Bustos-Nuño , Krithika Manohar , Mohammad H. Malakooti","doi":"10.1016/j.compscitech.2025.111258","DOIUrl":"10.1016/j.compscitech.2025.111258","url":null,"abstract":"<div><div>Embedding a secondary filler phase into liquid metal polymer composites is a promising strategy to enhance the effective properties of these composites and introduce additional functionalities. This study presents a physics-based model, validated through experiments, to predict the thermal conductivity and elastic modulus of elastomers with liquid and solid inclusions. Given the high filler-to-matrix volume ratios typical in these multifunctional composites, the model's accuracy is first confirmed for liquid metal elastomer composites with filler volume fractions exceeding 50 %. It is then extended to composites containing both liquid and solid particles. To investigate the effects of filler phase, size, and volume fraction, we synthesized and characterized three composite types: one with only liquid eutectic gallium-indium droplets, one with only solid zinc oxide particles, and one with both. This comprehensive study of modeling and experimental results, alongside failure strain analysis, provides new insights into the elasticity of functional elastomer composites with mixed filler types.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111258"},"PeriodicalIF":8.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242530","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

A self-cross-linked core-shell Fe3O4/polyimide composite aerogel: High-mechanical, intelligent fire protection and electromagnetic wave absorption performance 一种自交联核壳Fe3O4/聚酰亚胺复合气凝胶：具有高机械、智能防火和电磁波吸收性能

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-04 DOI: 10.1016/j.compscitech.2025.111256

Yaru Sun , Yanyan Zou , Yan Liu , Bo Cheng , Ying Hou , Fenglei Huang

{"title":"A self-cross-linked core-shell Fe3O4/polyimide composite aerogel: High-mechanical, intelligent fire protection and electromagnetic wave absorption performance","authors":"Yaru Sun , Yanyan Zou , Yan Liu , Bo Cheng , Ying Hou , Fenglei Huang","doi":"10.1016/j.compscitech.2025.111256","DOIUrl":"10.1016/j.compscitech.2025.111256","url":null,"abstract":"<div><div>Multifunctionality is a key direction for future protection, but effectively integrating multiple functions remains a significant challenge. Here, a self-cross-linked composite aerogel (PI/20Fe<sub>3</sub>O<sub>4</sub>@TS-Fe), core-shell Fe<sub>3</sub>O<sub>4</sub> (Fe<sub>3</sub>O<sub>4</sub>@TS-Fe) with amino groups can interact with acidic sites in polyimide (PI), is designed to achieve intelligent fire protection, radar stealth, and highly efficient heat-insulated performance. The PI/20Fe<sub>3</sub>O<sub>4</sub>@TS-Fe aerogel exhibits superior fire protection properties compared to neat PI aerogel. It achieves a 44.3 % lower peak heat release rate and a 57.8 % lower total heat release. Additionally, the enhanced thermoelectric properties of PI/Fe<sub>3</sub>O<sub>4</sub>@TS-Fe/GO enable accurate temperature sensing and stable fire-warning performance, with clear warnings lasting over 20 min. Furthermore, the synergistic effect of the structure and components endows the aerogel composite with dielectric loss capability for effective electromagnetic wave (EMW) absorption. The minimum reflection loss (<em>RL</em><sub>min</sub>) is −25.6 dB, and the effective absorption bandwidth (<em>EAB</em>) is 2.5 GHz. The radar cross section (<em>RCS</em>) simulations also further confirmed that the self-cross-linked Fe<sub>3</sub>O<sub>4</sub>/PI composite aerogel possess potential for radar stealth in practical applications. This work provides a novel pathway to fabricate multifunctional aerogel via designing a self-cross-linked structure.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111256"},"PeriodicalIF":8.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231823","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 boron nitride epoxy composites via dendritic amino surface modification for advanced packaging applications 高性能氮化硼环氧复合材料通过枝晶氨基表面改性的先进包装应用

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-04 DOI: 10.1016/j.compscitech.2025.111257

Zihao Lin , Alexandar King , Ju Won Lim , Kaushik Godbole , Kyoung-Sik Moon , Wen-Hsi Lee , Ching-Ping Wong

{"title":"High-performance boron nitride epoxy composites via dendritic amino surface modification for advanced packaging applications","authors":"Zihao Lin , Alexandar King , Ju Won Lim , Kaushik Godbole , Kyoung-Sik Moon , Wen-Hsi Lee , Ching-Ping Wong","doi":"10.1016/j.compscitech.2025.111257","DOIUrl":"10.1016/j.compscitech.2025.111257","url":null,"abstract":"<div><div>In this study, a rapid and scalable surface functionalization strategy is developed to enhance the interfacial thermal transport between hexagonal boron nitride (h-BN) fillers and epoxy matrices for high-performance thermal interface materials (TIMs). The modification process was employed: initial grafting of glycine onto BN surfaces, followed by Aza-Michael addition reactions to generate a hyperbranched polyacrylate/polyamine network. The optimized BN@G21-PA filler, when incorporated into an epoxy matrix at 30 wt%, achieved a thermal conductivity of 1.05 W/m·K, representing a 452.6 % increase over neat epoxy. Compared to unmodified BN, the interfacial thermal resistance was reduced by over 50 %, as estimated via effective medium theory. The composites also exhibited largely enhanced thermomechanical properties, including lower coefficient of thermal expansion (CTE), higher storage modulus, improved glass transition temperature, and superior rheological characteristics. Both experimentation and simulation further validated the superior cooling performance and system-level thermal management capability of BN@G21-PA composites in the performance tests on the TIMs. This work demonstrates an effective route toward next-generation polymer composites for advanced electronic packaging applications.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111257"},"PeriodicalIF":8.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271507","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

Elegant design of biobased carbon/polyaniline metacomposites for tunable epsilon-negative and epsilon-near-zero responses 优雅设计的生物基碳/聚苯胺超复合材料可调的负和近零响应

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-06-02 DOI: 10.1016/j.compscitech.2025.111255

Qiuyun Yang , Yunpeng Qu , Yunlei Zhou , Junfei Ding , Qiong Peng , Xiaosi Qi , Farid Manshaii , Yao Liu

{"title":"Elegant design of biobased carbon/polyaniline metacomposites for tunable epsilon-negative and epsilon-near-zero responses","authors":"Qiuyun Yang , Yunpeng Qu , Yunlei Zhou , Junfei Ding , Qiong Peng , Xiaosi Qi , Farid Manshaii , Yao Liu","doi":"10.1016/j.compscitech.2025.111255","DOIUrl":"10.1016/j.compscitech.2025.111255","url":null,"abstract":"<div><div>Characterized by the innovative random structure design of functional and matrix phases, metacomposites with <em>ε′</em>-negative (EN) and <em>ε′</em>-near-zero (ENZ) responses have emerged as a highly promising class of electromagnetic (EM) metamaterials. This work introduces novel biobased carbon/polyaniline (BC/PANI) metacomposites with a bilayer structure. The dual conductive network in these metacomposites consists of a three-dimensional, lignin-derived carbon porous network as the functional phase and a conductive polyaniline (PANI) network as the matrix, successfully achieving highly tunable ENZ (|<em>ε'|</em> < 1) and EN (<em>ε'</em> < 0) parameters within the radio-frequency band. Both electric dipole resonance and plasmonic oscillation contribute to the EN response in the 100 kHz-40 MHz region, as validated by the Lorentz-Drude model. The ENZ frequencies (190 kHz–418 kHz), as well as the magnitude and frequency dispersion of the EN response, are precisely regulated by the BC network and bilayer structure. The introduction of the porous BC network within the PANI matrix reduces the equivalent carrier concentration in the metacomposites, thereby lowering the absolute value of <em>ε'</em>. Furthermore, by leveraging the electric dipole competition mechanism at the BC/PANI-PANI bilayer interface, the frequency dispersion near the ENZ frequency is significantly minimized. The evolution of the electrical phase relationships in EN materials was elucidated using an equivalent circuit analysis method, revealing their inductive characteristics. This work enriches the category metacomposites through innovative microstructure design, providing a foundation for tunable ENZ and EN responses.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"270 ","pages":"Article 111255"},"PeriodicalIF":8.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231822","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

A comprehensive framework for modeling volatile transport and bubble dynamics in liquid composite molding processes 液体复合材料成型过程中挥发输运和气泡动力学建模的综合框架

IF 8.3 1区材料科学

Composites Science and Technology Pub Date : 2025-05-29 DOI: 10.1016/j.compscitech.2025.111254

Pavel Simacek, Navid Niknafs Kermani, Suresh G. Advani

{"title":"A comprehensive framework for modeling volatile transport and bubble dynamics in liquid composite molding processes","authors":"Pavel Simacek, Navid Niknafs Kermani, Suresh G. Advani","doi":"10.1016/j.compscitech.2025.111254","DOIUrl":"10.1016/j.compscitech.2025.111254","url":null,"abstract":"<div><div>In Liquid Composite Molding (LCM), the complete impregnation of fibrous preforms is essential to minimize porosity and achieve the desired mechanical performance. Voids may form when entrapped air, moisture, or resin-induced volatiles are not effectively removed prior to gelation. This work focuses on the transport and transformation of volatiles, either dissolved in the resin or present as nucleated bubbles, during the mold filling process. To accomplish this, it is necessary to predict the phenomena of nucleation, dissolution, and transport of both nucleated and dissolved volatiles. This paper presents a framework to model the dissolution, nucleation and tracking of nucleated bubbles during resin impregnation. The framework is integrated with the simulation of the resin impregnation process which provides the resin velocity and pressures during the filling. This integration enables the prediction of void locations and sizes at the end of the impregnation process as a function of the material properties, process parameters and part geometry.</div><div>The model is exercised to verify the patterns of volatile nucleation and dissolution and examine the effect of bubble mobility on bubble dynamics. The impact of bubble mobility, particularly its size dependence, is evaluated. Larger bubbles exhibit sufficient mobility to escape through the vents, facilitating passive degassing, while smaller bubbles tend to remain and may re-dissolve with pressure recovery. Finally, bubble entrapment near the location of merging flow fronts in the absence of a vent is demonstrated, highlighting the tendency for porosity accumulation around weld-lines as observed experimentally.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"269 ","pages":"Article 111254"},"PeriodicalIF":8.3,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213343","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