Composites Science and Technology最新文献_第5页

Unravelling the role of inter CNT yarn–yarn interactions in governing the failure behavior in a unidirectional CNT yarn-reinforced plastic composite

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-07 DOI: 10.1016/j.compscitech.2025.111137

Go Yamamoto , Sojun Nakano , Haruki Oyamada , Redha Akbar Ramadhan , Shugo Okamoto , Akihisa Takeuchi , Masayuki Uesugi , Akira Kunitomo , Nozomu Shigemitsu , Takuma Abe , Yoshinobu Shimamura , Haruto Kurono , Sota Goto , Yoku Inoue , Yasuhiko Hayashi , Hiroyuki Kawada

Recent rapid advancements related to enhancing the material properties of carbon nanotube (CNT) yarns, which are composed of twisted nanoscale CNTs, have opened new possibilities for their application as reinforcing agents in composite materials. In this study, the failure behaviors of CNT yarns were examined in a polymer matrix environment under tensile loading using synchrotron radiation X-ray computed tomography (CT) and polarized light microscopy. Double-yarn fragmentation specimens, composed of two closely positioned CNT yarns embedded in parallel, were employed to examine the failure interactions between the CNT yarns. X-ray CT observations revealed that the fracture surfaces of the CNT yarns exhibited a high degree of irregularity, with cracks propagating into the surrounding matrix and some extending into the yarn bodies, thereby suggesting that the failure of CNT yarns involves both breakage and slippage of the CNTs. The investigation of yarn–yarn failure interactions revealed that ∼70 % of the fractures observed in the CNT yarns occurred as coordinated fractures, which was clearly higher than the ∼20 % observed without such interactions. This finding demonstrates that the failure behaviors of CNT yarns in the polymer matrix environment are governed by yarn–yarn interactions rather than by the statistical strength distributions of the yarns. These results provide valuable insights for researchers in the field of composite materials, ultimately promoting further advancements in the development of strength prediction models based on the actual failure behaviors of CNT yarns in the polymer matrix environment.

{"title":"Unravelling the role of inter CNT yarn–yarn interactions in governing the failure behavior in a unidirectional CNT yarn-reinforced plastic composite","authors":"Go Yamamoto , Sojun Nakano , Haruki Oyamada , Redha Akbar Ramadhan , Shugo Okamoto , Akihisa Takeuchi , Masayuki Uesugi , Akira Kunitomo , Nozomu Shigemitsu , Takuma Abe , Yoshinobu Shimamura , Haruto Kurono , Sota Goto , Yoku Inoue , Yasuhiko Hayashi , Hiroyuki Kawada","doi":"10.1016/j.compscitech.2025.111137","DOIUrl":"10.1016/j.compscitech.2025.111137","url":null,"abstract":"<div><div>Recent rapid advancements related to enhancing the material properties of carbon nanotube (CNT) yarns, which are composed of twisted nanoscale CNTs, have opened new possibilities for their application as reinforcing agents in composite materials. In this study, the failure behaviors of CNT yarns were examined in a polymer matrix environment under tensile loading using synchrotron radiation X-ray computed tomography (CT) and polarized light microscopy. Double-yarn fragmentation specimens, composed of two closely positioned CNT yarns embedded in parallel, were employed to examine the failure interactions between the CNT yarns. X-ray CT observations revealed that the fracture surfaces of the CNT yarns exhibited a high degree of irregularity, with cracks propagating into the surrounding matrix and some extending into the yarn bodies, thereby suggesting that the failure of CNT yarns involves both breakage and slippage of the CNTs. The investigation of yarn–yarn failure interactions revealed that ∼70 % of the fractures observed in the CNT yarns occurred as coordinated fractures, which was clearly higher than the ∼20 % observed without such interactions. This finding demonstrates that the failure behaviors of CNT yarns in the polymer matrix environment are governed by yarn–yarn interactions rather than by the statistical strength distributions of the yarns. These results provide valuable insights for researchers in the field of composite materials, ultimately promoting further advancements in the development of strength prediction models based on the actual failure behaviors of CNT yarns in the polymer matrix environment.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111137"},"PeriodicalIF":8.3,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep learning accelerates reverse design of Magnetorheological elastomer

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-07 DOI: 10.1016/j.compscitech.2025.111148

Hang Ren , Dan Zhao , Liqiang Dong , Shaogang Liu , Jinshui Yang , Tianyi Zhao , Yongle Fan

Magnetorheological elastomers (MREs) are intelligent materials with tunable properties under magnetic fields, offering broad applications. Our previous work [1] finely designed artificial intelligence model to characterize the magnetic-induced storage modulus of MRE accurately but relied on manual expertise for reverse design. A deep learning framework that integrates generators and predictors was developed to provide a fast and accurate material proportioning solution for MRE synthesis. First, 16 types of MREs were prepared and their storage moduli were tested. The results indicate that an increase in iron powder content enhances the modulus of MRE, while silicone oil acts as a slack agent, making MRE softer. Second, a predictor generator framework was developed to achieve the modulus prediction and reverse design of the MRE. The predictor utilized the magnetic dipole theory as a physical constraint to accurately predict the storage modulus of MREs (R² = 0.9967). The generator quickly generated material ratios that matched the required storage modulus within 0.02 s while achieving high precision (R² = 0.9882). Finally, the challenge of generating unstable solutions in the reverse design was addressed by optimizing the loss function. As an innovative tool, the proposed framework holds potential for applications in industrial fields such as vibration control and soft machinery. Moreover, this framework has brought unprecedented convenience to non-professional researchers, enabling them to apply it to industrial production and accelerate the commercialization of MREs.

{"title":"Deep learning accelerates reverse design of Magnetorheological elastomer","authors":"Hang Ren , Dan Zhao , Liqiang Dong , Shaogang Liu , Jinshui Yang , Tianyi Zhao , Yongle Fan","doi":"10.1016/j.compscitech.2025.111148","DOIUrl":"10.1016/j.compscitech.2025.111148","url":null,"abstract":"<div><div>Magnetorheological elastomers (MREs) are intelligent materials with tunable properties under magnetic fields, offering broad applications. Our previous work [1] finely designed artificial intelligence model to characterize the magnetic-induced storage modulus of MRE accurately but relied on manual expertise for reverse design. A deep learning framework that integrates generators and predictors was developed to provide a fast and accurate material proportioning solution for MRE synthesis. First, 16 types of MREs were prepared and their storage moduli were tested. The results indicate that an increase in iron powder content enhances the modulus of MRE, while silicone oil acts as a slack agent, making MRE softer. Second, a predictor generator framework was developed to achieve the modulus prediction and reverse design of the MRE. The predictor utilized the magnetic dipole theory as a physical constraint to accurately predict the storage modulus of MREs (R<sup>2</sup> = 0.9967). The generator quickly generated material ratios that matched the required storage modulus within 0.02 s while achieving high precision (R<sup>2</sup> = 0.9882). Finally, the challenge of generating unstable solutions in the reverse design was addressed by optimizing the loss function. As an innovative tool, the proposed framework holds potential for applications in industrial fields such as vibration control and soft machinery. Moreover, this framework has brought unprecedented convenience to non-professional researchers, enabling them to apply it to industrial production and accelerate the commercialization of MREs.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111148"},"PeriodicalIF":8.3,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591371","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

Measurement of interfacial bonding strength between the micro-spherical filler and the matrix in microcapsule/epoxy composites

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-06 DOI: 10.1016/j.compscitech.2025.111134

Guijing Dou , Lei Zhao , Weihai Xia , Hanyang Jiang , Zhongyu Piao , Guangjian Peng

Interfacial bonding strength between fillers and matrices is crucial to the mechanical performance of composites. However, quantitatively measuring this strength remains challenging due to the complex geometries and microscale dimensions of fillers. This study presents a novel experimental method to measure the interfacial bonding strength between microparticles and the matrix in microcapsule/epoxy composites. A stepped microchannel structure was fabricated by assembling glass capillaries with inner diameters of 100 μm and 400 μm. This structure facilitated the formation of fiber specimens where a single microcapsule was embedded at the junction of two epoxy fibers with different diameters. After the matrix cured, the external glass capillaries were removed, yielding specimens designed to fail precisely at the interface between the microcapsule and the 100 μm epoxy fiber. The critical debonding load and contact area were meticulously measured to calculate the interfacial bonding strength. The effects of surface modification of microcapsules using three silane coupling agents were systematically investigated. All coupling agents significantly enhanced interfacial bonding strength, with the highest improvement reaching 90.2 %. This innovative method offers a reliable and quantitative means of assessing interfacial bonding strength in composite materials. It holds potential to accelerate the development of high-performance composites and deepen our understanding of their interfacial behaviors.

{"title":"Measurement of interfacial bonding strength between the micro-spherical filler and the matrix in microcapsule/epoxy composites","authors":"Guijing Dou , Lei Zhao , Weihai Xia , Hanyang Jiang , Zhongyu Piao , Guangjian Peng","doi":"10.1016/j.compscitech.2025.111134","DOIUrl":"10.1016/j.compscitech.2025.111134","url":null,"abstract":"<div><div>Interfacial bonding strength between fillers and matrices is crucial to the mechanical performance of composites. However, quantitatively measuring this strength remains challenging due to the complex geometries and microscale dimensions of fillers. This study presents a novel experimental method to measure the interfacial bonding strength between microparticles and the matrix in microcapsule/epoxy composites. A stepped microchannel structure was fabricated by assembling glass capillaries with inner diameters of 100 μm and 400 μm. This structure facilitated the formation of fiber specimens where a single microcapsule was embedded at the junction of two epoxy fibers with different diameters. After the matrix cured, the external glass capillaries were removed, yielding specimens designed to fail precisely at the interface between the microcapsule and the 100 μm epoxy fiber. The critical debonding load and contact area were meticulously measured to calculate the interfacial bonding strength. The effects of surface modification of microcapsules using three silane coupling agents were systematically investigated. All coupling agents significantly enhanced interfacial bonding strength, with the highest improvement reaching 90.2 %. This innovative method offers a reliable and quantitative means of assessing interfacial bonding strength in composite materials. It holds potential to accelerate the development of high-performance composites and deepen our understanding of their interfacial behaviors.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111134"},"PeriodicalIF":8.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579261","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

Interfacial enhancement mechanism of carbon fiber composites molded by electrothermal in-situ co-curing with CNT film

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-05 DOI: 10.1016/j.compscitech.2025.111141

Kuo Yang , Hongwei Li , Xiaolong Li , Pengfei Gao , Xin Zhang , Qingming Wang , Mei Zhan

The molding technology of composites through electrothermal in-situ co-curing with carbon nanotube (CNT) film, by comparing with the conventional curing processes, is an efficient and low-cost out-of-autoclave process. The most prominent feature of this technology lies in the introduction of CNT film and the application of electric current. However, they inevitably affect the interfacial bonding and molding properties of composites. So, the mechanism and law behind interfacial bonding is crucial for developing the high-performance curing process. To make them clear, three kinds of layup schemes of CNT film/carbon fiber prepreg were designed in this study, and then the composite unidirectional plates were prepared by using the electrothermal in-situ co-curing technology with CNT film. Compared with the same layup structure by conventional thermally cured, the mechanical properties of the composites by electrothermally cured were significantly higher. For the reason of which, the interfacial enhancement mechanism is revealed as follows: (1) the electrical treatment modifies the surface structure of the carbon fiber, thereby increasing the interfacial bonding strength between the carbon fiber and resin; (2) the pre-curing effect induced by electrothermal heating within the CNT film enhances the interfacial bonding strength between the CNT film and resin; (3) the combined effects of electrical treatment and pre-curing increase the thickness of the interfacial layer, reducing the modulus gradient and stress concentration at the interface, thereby enhancing the strength of composites. The above results lay a theoretical foundation for the property modulation of composites molded by the electrothermal in-situ co-curing process.

{"title":"Interfacial enhancement mechanism of carbon fiber composites molded by electrothermal in-situ co-curing with CNT film","authors":"Kuo Yang , Hongwei Li , Xiaolong Li , Pengfei Gao , Xin Zhang , Qingming Wang , Mei Zhan","doi":"10.1016/j.compscitech.2025.111141","DOIUrl":"10.1016/j.compscitech.2025.111141","url":null,"abstract":"<div><div>The molding technology of composites through electrothermal in-situ co-curing with carbon nanotube (CNT) film, by comparing with the conventional curing processes, is an efficient and low-cost out-of-autoclave process. The most prominent feature of this technology lies in the introduction of CNT film and the application of electric current. However, they inevitably affect the interfacial bonding and molding properties of composites. So, the mechanism and law behind interfacial bonding is crucial for developing the high-performance curing process. To make them clear, three kinds of layup schemes of CNT film/carbon fiber prepreg were designed in this study, and then the composite unidirectional plates were prepared by using the electrothermal in-situ co-curing technology with CNT film. Compared with the same layup structure by conventional thermally cured, the mechanical properties of the composites by electrothermally cured were significantly higher. For the reason of which, the interfacial enhancement mechanism is revealed as follows: (1) the electrical treatment modifies the surface structure of the carbon fiber, thereby increasing the interfacial bonding strength between the carbon fiber and resin; (2) the pre-curing effect induced by electrothermal heating within the CNT film enhances the interfacial bonding strength between the CNT film and resin; (3) the combined effects of electrical treatment and pre-curing increase the thickness of the interfacial layer, reducing the modulus gradient and stress concentration at the interface, thereby enhancing the strength of composites. The above results lay a theoretical foundation for the property modulation of composites molded by the electrothermal in-situ co-curing process.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111141"},"PeriodicalIF":8.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579260","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

Construction of multifunctional composite hydrogels via zwitterionic osmosis, the Hofmeister effect, and metal complexation for flexible sensors

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-05 DOI: 10.1016/j.compscitech.2025.111138

Qiuyan Luo, Siyu Yang, Zewen Wu, Juguo Dai, Meng Wang, Yiting Xu, Lizong Dai

Hydrogel-based flexible sensors have emerged as a prominent research focus within the scientific research. However, effectively balancing the electrical conductivity and mechanical properties of hydrogels presents significant challenges. In this study, a polyacrylamide/gelatin/cellulose composite hydrogel (PGC) scaffold was initially synthesized, followed by immersion in a solution of betaine and zinc sulfate, and a multifunctional composite hydrogel (PGC-BZn) with excellent mechanical properties and electrical conductivity was successfully prepared through multi-scale synergistic interactions. The results indicate that the Hofmeister effect induced by sulfate ions, the metal complexation effect introduced by zinc ions, and the synergistic interactions of hydrogen bonding and electrostatic forces stemming from betaine penetration collectively confer notable characteristics to the composite hydrogel, including high transparency (70 %), remarkable stretchability (∼411 %), good conductivity (43.1 mS/m), outstanding freeze resistance (−27.9 °C), excellent antibacterial activity, and superior moisture retention. The strain sensors constructed from the PGC-BZn composite hydrogel demonstrated high sensitivity (GF = 5.891), a broad sensing detection range (0 %–450 %), as well as rapid response times and good cyclic stability. This research presents a simple and versatile method for the preparation of multifunctional composite hydrogels, with potential applicability to other salts, zwitterions, and polymer systems. This innovative approach offers new perspectives for the construction of multifunctional composite hydrogels, contributing to the advancement of flexible sensor technology.

{"title":"Construction of multifunctional composite hydrogels via zwitterionic osmosis, the Hofmeister effect, and metal complexation for flexible sensors","authors":"Qiuyan Luo, Siyu Yang, Zewen Wu, Juguo Dai, Meng Wang, Yiting Xu, Lizong Dai","doi":"10.1016/j.compscitech.2025.111138","DOIUrl":"10.1016/j.compscitech.2025.111138","url":null,"abstract":"<div><div>Hydrogel-based flexible sensors have emerged as a prominent research focus within the scientific research. However, effectively balancing the electrical conductivity and mechanical properties of hydrogels presents significant challenges. In this study, a polyacrylamide/gelatin/cellulose composite hydrogel (PGC) scaffold was initially synthesized, followed by immersion in a solution of betaine and zinc sulfate, and a multifunctional composite hydrogel (PGC-BZn) with excellent mechanical properties and electrical conductivity was successfully prepared through multi-scale synergistic interactions. The results indicate that the Hofmeister effect induced by sulfate ions, the metal complexation effect introduced by zinc ions, and the synergistic interactions of hydrogen bonding and electrostatic forces stemming from betaine penetration collectively confer notable characteristics to the composite hydrogel, including high transparency (70 %), remarkable stretchability (∼411 %), good conductivity (43.1 mS/m), outstanding freeze resistance (−27.9 °C), excellent antibacterial activity, and superior moisture retention. The strain sensors constructed from the PGC-BZn composite hydrogel demonstrated high sensitivity (GF = 5.891), a broad sensing detection range (0 %–450 %), as well as rapid response times and good cyclic stability. This research presents a simple and versatile method for the preparation of multifunctional composite hydrogels, with potential applicability to other salts, zwitterions, and polymer systems. This innovative approach offers new perspectives for the construction of multifunctional composite hydrogels, contributing to the advancement of flexible sensor technology.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111138"},"PeriodicalIF":8.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591370","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

Hierarchical mxene/Fe3O4/cellulose nanofiber composites with layer-by-layer architecture for high-performance electromagnetic interference shielding

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-05 DOI: 10.1016/j.compscitech.2025.111136

Xiaoxuan Tan , Yang He , Chunhong Wang , Yu Zhang , Wenshu Wang , Hanyu Li , Rongrong Yu

The proliferation of electronic devices has made electromagnetic interference (EMI) shielding increasingly critical for both device performance and human health protection. Here, we demonstrate a hierarchical composite film that achieves exceptional EMI shielding through the synergistic integration of magnetic nanofibers and MXene nanosheets. By combining electrospinning and layer-by-layer assembly, we fabricate a composite structure where Fe₃O₄-loaded cellulose/PAN nanofibers alternate with Ti₃C₂T_x MXene layers, creating multiple heterogeneous interfaces for enhanced electromagnetic wave attenuation. The engineered architecture promotes multiple electromagnetic loss mechanisms through interface polarization, magnetic losses, and multiple internal reflections. The optimized composite exhibits remarkable performance metrics: achieving a thickness-specific shielding efficiency of 118 dB/mm at just 0.18 mm thickness, significantly surpassing current commercial standards. At 0.64 mm thickness, the electromagnetic shielding effectiveness reaches 33.2 dB, effectively blocking over 99.9 % of electromagnetic radiation. Notably, the composite demonstrates exceptional mechanical durability, retaining 96.8 % of its shielding effectiveness after 300 bending cycles. The integration of renewable cellulose and magnetic components with highly conductive MXene not only enhances electromagnetic wave attenuation but also promotes environmental sustainability. This combination of ultra-thin profile, superior shielding performance, and mechanical flexibility, coupled with eco-friendly material selection, provides a promising pathway for EMI protection.

{"title":"Hierarchical mxene/Fe3O4/cellulose nanofiber composites with layer-by-layer architecture for high-performance electromagnetic interference shielding","authors":"Xiaoxuan Tan , Yang He , Chunhong Wang , Yu Zhang , Wenshu Wang , Hanyu Li , Rongrong Yu","doi":"10.1016/j.compscitech.2025.111136","DOIUrl":"10.1016/j.compscitech.2025.111136","url":null,"abstract":"<div><div>The proliferation of electronic devices has made electromagnetic interference (EMI) shielding increasingly critical for both device performance and human health protection. Here, we demonstrate a hierarchical composite film that achieves exceptional EMI shielding through the synergistic integration of magnetic nanofibers and MXene nanosheets. By combining electrospinning and layer-by-layer assembly, we fabricate a composite structure where Fe<sub>3</sub>O<sub>4</sub>-loaded cellulose/PAN nanofibers alternate with Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene layers, creating multiple heterogeneous interfaces for enhanced electromagnetic wave attenuation. The engineered architecture promotes multiple electromagnetic loss mechanisms through interface polarization, magnetic losses, and multiple internal reflections. The optimized composite exhibits remarkable performance metrics: achieving a thickness-specific shielding efficiency of 118 dB/mm at just 0.18 mm thickness, significantly surpassing current commercial standards. At 0.64 mm thickness, the electromagnetic shielding effectiveness reaches 33.2 dB, effectively blocking over 99.9 % of electromagnetic radiation. Notably, the composite demonstrates exceptional mechanical durability, retaining 96.8 % of its shielding effectiveness after 300 bending cycles. The integration of renewable cellulose and magnetic components with highly conductive MXene not only enhances electromagnetic wave attenuation but also promotes environmental sustainability. This combination of ultra-thin profile, superior shielding performance, and mechanical flexibility, coupled with eco-friendly material selection, provides a promising pathway for EMI protection.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111136"},"PeriodicalIF":8.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609376","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

AI-driven residual strength diagnostics of composites using their electrical behavior under low-stress cyclic loading

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-04 DOI: 10.1016/j.compscitech.2025.111133

Ali Ebrahimi , Farjad Shadmehri , Suong Van Hoa

A novel non-destructive testing (NDT) method was developed to predict the residual strength of composites, with unknown histories of fatigue damage, using their electrical behavior during a low stress cyclic loading test. Ninety-five samples, representing a wide range of fatigue damage levels, were prepared and subjected to a low-stress cyclic loading test, as a diagnostic test, while their electrical behavior was monitored. The samples then underwent quasi-static loading until failure to measure their corresponding residual strengths. To establish a relationship between the electrical behavior of samples during the diagnostic test and their corresponding residual strengths, various machine learning techniques were implemented. K-nearest neighbor (KNN), Decision Tree (DT), Random Forest, Extreme Gradient Boosting, Support Vector Regressor (SVR), and Feedforward Artificial Neural Networks were employed in two different approaches: as standalone predictors, and in an ensemble learning approach. The analysis demonstrated that a KNN meta-model, incorporating DT, SVR, and KNN as base models, in an ensemble framework, achieved the best performance, with a mean absolute percentage error (MAPE) of 5.7 % in predicting residual strength. This significant performance underscores the potential of our low-stress diagnostic test for predicting the residual strength of composites, even when the fatigue damage history is unknown.

{"title":"AI-driven residual strength diagnostics of composites using their electrical behavior under low-stress cyclic loading","authors":"Ali Ebrahimi , Farjad Shadmehri , Suong Van Hoa","doi":"10.1016/j.compscitech.2025.111133","DOIUrl":"10.1016/j.compscitech.2025.111133","url":null,"abstract":"<div><div>A novel non-destructive testing (NDT) method was developed to predict the residual strength of composites, with unknown histories of fatigue damage, using their electrical behavior during a low stress cyclic loading test. Ninety-five samples, representing a wide range of fatigue damage levels, were prepared and subjected to a low-stress cyclic loading test, as a diagnostic test, while their electrical behavior was monitored. The samples then underwent quasi-static loading until failure to measure their corresponding residual strengths. To establish a relationship between the electrical behavior of samples during the diagnostic test and their corresponding residual strengths, various machine learning techniques were implemented. K-nearest neighbor (KNN), Decision Tree (DT), Random Forest, Extreme Gradient Boosting, Support Vector Regressor (SVR), and Feedforward Artificial Neural Networks were employed in two different approaches: as standalone predictors, and in an ensemble learning approach. The analysis demonstrated that a KNN meta-model, incorporating DT, SVR, and KNN as base models, in an ensemble framework, achieved the best performance, with a mean absolute percentage error (MAPE) of 5.7 % in predicting residual strength. This significant performance underscores the potential of our low-stress diagnostic test for predicting the residual strength of composites, even when the fatigue damage history is unknown.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111133"},"PeriodicalIF":8.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical and thermal conductive composites with thermal management and electromagnetic shielding enhanced by 3D network

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-03 DOI: 10.1016/j.compscitech.2025.111135

Chengwei Jiang , Changxiang Hao , Chunfang Zi , Jing Li , Weijun Liu , Yingman Bian , Fangyuan Sun , Yiqi Xu , Yuanxin Yan , Liyang Wang , Fengyu Su , Yanqing Tian

The increasing integration and power density of electronic devices demands materials with superior thermal management and electromagnetic interference (EMI) shielding properties. Herein, we developed a three-dimensional conductive polymer composite by combining amino-silane modified graphene nanoplates (mGNPs) and carboxylated carbon nanotubes (CNT-COOHs) through salt template-assisted assembly and vacuum impregnation. The composite exhibited dramatically enhanced thermal conductivity from 0.154 W/m·K of pure polydimethylsiloxane (PDMS) to 9.86 W/m·K (In-plane) and 7.62 W/m·K (Out-plane), along with superior EMI shielding effectiveness from 3.1 dB to 78.6 dB at merely 9.78 wt% fillers (e.g. mGNPs and CNT-COOHs) loading. The remarkable improvement stems from the synergistic effects of the 3D network architecture and improved interfacial compatibility. Practical tests demonstrated excellent heat dissipation capabilities in LED devices, maintaining the device temperature at 34.3 °C compared to 127.3 °C with pure PDMS. The superior thermal and EMI shielding performances of these composites indicate great potential for both thermal management and electromagnetic protection in advanced electronic applications.

{"title":"Electrical and thermal conductive composites with thermal management and electromagnetic shielding enhanced by 3D network","authors":"Chengwei Jiang , Changxiang Hao , Chunfang Zi , Jing Li , Weijun Liu , Yingman Bian , Fangyuan Sun , Yiqi Xu , Yuanxin Yan , Liyang Wang , Fengyu Su , Yanqing Tian","doi":"10.1016/j.compscitech.2025.111135","DOIUrl":"10.1016/j.compscitech.2025.111135","url":null,"abstract":"<div><div>The increasing integration and power density of electronic devices demands materials with superior thermal management and electromagnetic interference (EMI) shielding properties. Herein, we developed a three-dimensional conductive polymer composite by combining amino-silane modified graphene nanoplates (mGNPs) and carboxylated carbon nanotubes (CNT-COOHs) through salt template-assisted assembly and vacuum impregnation. The composite exhibited dramatically enhanced thermal conductivity from 0.154 W/m·K of pure polydimethylsiloxane (PDMS) to 9.86 W/m·K (In-plane) and 7.62 W/m·K (Out-plane), along with superior EMI shielding effectiveness from 3.1 dB to 78.6 dB at merely 9.78 wt% fillers (e.g. mGNPs and CNT-COOHs) loading. The remarkable improvement stems from the synergistic effects of the 3D network architecture and improved interfacial compatibility. Practical tests demonstrated excellent heat dissipation capabilities in LED devices, maintaining the device temperature at 34.3 °C compared to 127.3 °C with pure PDMS. The superior thermal and EMI shielding performances of these composites indicate great potential for both thermal management and electromagnetic protection in advanced electronic applications.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111135"},"PeriodicalIF":8.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571500","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

Preparation and properties of thermally conductive and recyclable damping rubbers filled with lignin-graphene hybrid filler

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-03 DOI: 10.1016/j.compscitech.2025.111132

Huanhuan Dong , Yong Zhang

Thermally conductive and damping rubber materials could protect electronic components from the negative impact of vibration and heat built-up. Meanwhile, exploring a green and facile method to prepare and recycle the damping rubber materials is important. A hybrid filler was prepared by blending lignin, samarium chloride, and polyvinylpyrrolidone-modified graphene. Thermally conductive and damping carboxylated nitrile butadiene rubber (XNBR) composites with recyclable capability were prepared by compounding the hybrid filler with XNBR and bio-based epoxidized soybean oil was used instead of conventional curing agents. The addition of the hybrid filler significantly increased the thermal conductivity, curing rate, equilibrium torque, and crosslink density of XNBR, and enhanced the damping and mechanical properties of XNBR. With the hybrid filler content increasing, the thermal conductivity, and damping properties of XNBR improved. The end-of-life XNBR composites could be recycled and reprocessed. The recycled and reprocessed composites have good damping, mechanical properties, and thermal conductivity. The work provides a new insight into green preparation and recycling of thermally conductive and damping rubber materials.

导热阻尼橡胶材料可以保护电子元件免受振动和热量积聚的负面影响。同时，探索一种绿色、简便的方法来制备和回收阻尼橡胶材料非常重要。通过混合木质素、氯化钐和聚乙烯吡咯烷酮改性石墨烯，制备了一种混合填料。通过将混合填料与丁腈橡胶复合，制备出了具有可回收能力的导热阻尼羧基丁腈橡胶（XNBR）复合材料，并用生物基环氧大豆油代替了传统的固化剂。混合填料的加入显著提高了丁腈橡胶的热导率、固化速率、平衡扭矩和交联密度，并增强了丁腈橡胶的阻尼和力学性能。随着混合填料含量的增加，XNBR 的导热性和阻尼特性也得到了改善。报废的腈纶丁腈橡胶复合材料可回收再加工。回收和再加工后的复合材料具有良好的阻尼、机械性能和导热性能。这项研究为导热阻尼橡胶材料的绿色制备和回收利用提供了新的思路。

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引用次数: 0

Multifunctional meta-absorber based on CB-PLA composite and magnetic materials for electromagnetic absorption and load-bearing capacity

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-01 DOI: 10.1016/j.compscitech.2025.111131

Sen Zhang , Qing An , Dawei Li , Ke Chen , Junming Zhao , Tian Jiang , Ping Chen , Wenhe Liao , Tingting Liu , Yijun Feng

Low-profile electromagnetic (EM) absorbers with broadband absorption properties meet the stealth requirements of low-observable platforms. However, most studies of these EM absorbers rarely focus on mechanical properties. Based on carbon black (CB)-polylatic acid (PLA) composite and magnetic materials, this study offers a novel design recipe for meta-absorbers with excellent EM performance and mechanical properties. The three dimensional (3-D) printed lossy dielectric structure, with a thickness of 20.1 ± 0.1 mm and fabricated from the CB-PLA composite, and the 1.3 mm thick magnetic substrate are utilized as the principal frequency-dependent functional motifs. To validate the design, the optimized meta-absorber was manufactured, and the experimental findings demonstrate that its reflection coefficient remains below −10 dB within the frequency range of 1.36–40 GHz. The lossy dielectric structure exhibits a compressive strength of up to 3.75 MPa while maintaining a density of just 178.2 kg/m³, with an energy absorption capacity of 1.49 × 10³ kJ/m³ per unit volume. The overall thickness of the meta-absorber is 21.4 mm, equivalent to approximately 0.097 times the wavelength at 1.36 GHz. The proposal paves the way for the new paradigm of multifunctional meta-absorbers for both EM absorption and load bearing.

{"title":"Multifunctional meta-absorber based on CB-PLA composite and magnetic materials for electromagnetic absorption and load-bearing capacity","authors":"Sen Zhang , Qing An , Dawei Li , Ke Chen , Junming Zhao , Tian Jiang , Ping Chen , Wenhe Liao , Tingting Liu , Yijun Feng","doi":"10.1016/j.compscitech.2025.111131","DOIUrl":"10.1016/j.compscitech.2025.111131","url":null,"abstract":"<div><div>Low-profile electromagnetic (EM) absorbers with broadband absorption properties meet the stealth requirements of low-observable platforms. However, most studies of these EM absorbers rarely focus on mechanical properties. Based on carbon black (CB)-polylatic acid (PLA) composite and magnetic materials, this study offers a novel design recipe for meta-absorbers with excellent EM performance and mechanical properties. The three dimensional (3-D) printed lossy dielectric structure, with a thickness of 20.1 ± 0.1 mm and fabricated from the CB-PLA composite, and the 1.3 mm thick magnetic substrate are utilized as the principal frequency-dependent functional motifs. To validate the design, the optimized meta-absorber was manufactured, and the experimental findings demonstrate that its reflection coefficient remains below −10 dB within the frequency range of 1.36–40 GHz. The lossy dielectric structure exhibits a compressive strength of up to 3.75 MPa while maintaining a density of just 178.2 kg/m<sup>3</sup>, with an energy absorption capacity of 1.49 × 10<sup>3</sup> kJ/m<sup>3</sup> per unit volume. The overall thickness of the meta-absorber is 21.4 mm, equivalent to approximately 0.097 times the wavelength at 1.36 GHz. The proposal paves the way for the new paradigm of multifunctional meta-absorbers for both EM absorption and load bearing.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111131"},"PeriodicalIF":8.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534118","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