Composites Science and Technology最新文献

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One-step assembly of conductive coatings from polyphenol and Nanocarbon-PIL: A versatile approach for fabricating multifunctional sensors
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-28 DOI: 10.1016/j.compscitech.2025.111083
Zhongtao Xu , Yuhan Chen , Kaiyu Li , Yao Zhang , Yuan Liang , Hai Wan , Wenbin Jin , Shuohan Huang , Peng Wei , Yuwei Chen , Yanping Wang , Yong He , Yumin Xia
{"title":"One-step assembly of conductive coatings from polyphenol and Nanocarbon-PIL: A versatile approach for fabricating multifunctional sensors","authors":"Zhongtao Xu ,&nbsp;Yuhan Chen ,&nbsp;Kaiyu Li ,&nbsp;Yao Zhang ,&nbsp;Yuan Liang ,&nbsp;Hai Wan ,&nbsp;Wenbin Jin ,&nbsp;Shuohan Huang ,&nbsp;Peng Wei ,&nbsp;Yuwei Chen ,&nbsp;Yanping Wang ,&nbsp;Yong He ,&nbsp;Yumin Xia","doi":"10.1016/j.compscitech.2025.111083","DOIUrl":"10.1016/j.compscitech.2025.111083","url":null,"abstract":"<div><div>A highly conductive strategy for even coating carbon nanomaterials is in great demand for various applications. We introduce a conductive modification technique that is universally applicable to a range of substrates. It involves enhancing surface electronegativity by dip-coating various substrates with tannic acid (TA) and ferric chloride (FeCl<sub>3</sub>) solutions. The process was further refined by the ability of imidazolyl poly (ionic liquid) (PIL-Cl) to disperse carbon black (CB) in water. The conductive modification of various substrate surfaces was facilitated based on electrostatic interactions between the TA-Fe<sup>3+</sup> coating and the CB-(PIL-Cl) dispersion. Meanwhile, to demonstrate the potential of this approach in fabricating materials for wearable sensors, we have fabricated conductive PET fabrics (PTFA@CB). These PTFA@CB fabrics serve as strain sensors, capable of tracking human movement. Additionally, the multi-layer fabric stack design can function as a pressure sensor, providing feedback on pressure coordinates and detecting gripping motions. In addition, the TA-Fe<sup>3+</sup> coating makes PTFA@CB significantly hydrophilic, which improves their responsiveness to humidity. The method described in this paper can be extended to deposit carbon nanomaterials onto various substrates with diverse shapes and properties. The process we developed offers a simple, convenient, and environmentally friendly approach for preparing conductive substrates, with the potential for scalable production.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111083"},"PeriodicalIF":8.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093025","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
Organic-inorganic crosslinking PVDF composites for high storage densities
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-28 DOI: 10.1016/j.compscitech.2025.111082
Qianqian Yu , Haijun Wang , Yisha Ma , Shaojuan Wang , Jian Hu , Hao Zhang , Tong Wang , Leipeng Liu , Shouke Yan
{"title":"Organic-inorganic crosslinking PVDF composites for high storage densities","authors":"Qianqian Yu ,&nbsp;Haijun Wang ,&nbsp;Yisha Ma ,&nbsp;Shaojuan Wang ,&nbsp;Jian Hu ,&nbsp;Hao Zhang ,&nbsp;Tong Wang ,&nbsp;Leipeng Liu ,&nbsp;Shouke Yan","doi":"10.1016/j.compscitech.2025.111082","DOIUrl":"10.1016/j.compscitech.2025.111082","url":null,"abstract":"<div><div>The rapid development of modern electronic and electrical applications has attracted extensive attention to dielectric polymer matrix composites with high dielectric constant and energy density. In this study, an organic-inorganic homogeneous composite with improved phase interface was prepared by physically cross-linking amorphous calcium sulfate oligomers (CSOs) with PVDF chains. The dielectric properties and energy storage properties of the composite films were improved by controlling the microstructure of PVDF composite films by CSOs. The results show that the addition of CSOs has a strong inducing effect on the polarity of PVDF, while reducing the crystallinity and crystallite size of PVDF, thereby improving the breakdown performance of the composites. When the applied electric field is 324 kV/mm, the maximum energy storage density is 16.12 J/cm<sup>3</sup> and the energy storage efficiency is maintained at 87.17 %. Therefore, this work provides a new strategy for the preparation of high-performance polymer-based energy storage materials.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111082"},"PeriodicalIF":8.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093035","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
Synergistic interlaminar strengthening of high-content continuous fiber reinforced composites via ultrasound and plasma-assisted 3D printing
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-28 DOI: 10.1016/j.compscitech.2025.111079
Weijun Zhu, Long Fu, Quan Zhi, Zhikun Zhang, Ning Wang, Yingying Zhang, Dongsheng Li
{"title":"Synergistic interlaminar strengthening of high-content continuous fiber reinforced composites via ultrasound and plasma-assisted 3D printing","authors":"Weijun Zhu,&nbsp;Long Fu,&nbsp;Quan Zhi,&nbsp;Zhikun Zhang,&nbsp;Ning Wang,&nbsp;Yingying Zhang,&nbsp;Dongsheng Li","doi":"10.1016/j.compscitech.2025.111079","DOIUrl":"10.1016/j.compscitech.2025.111079","url":null,"abstract":"<div><div>Poor interlaminar performance is still the major problem for 3D printing of continuous fiber-reinforced thermoplastic composites, especially when the fiber content is over 50 %. In this work, an ultrasound and plasma-assisted 3D printing method was proposed towards the synergistic interlaminar strengthening. Fiber-matrix interface defects at the interlaminar zone were identified by a comparison study, which are the causes behind the poor interlaminar properties for high fiber content composites. Experimental and modeling approaches were used to study the effects of printing and strengthening parameters on interlaminar properties. The physical and chemical effects of ultrasound and plasma on material microstructure was investigated and a synergistic effect model was presented. The proposed synergistic strengthening method can greatly reduce the porosity, from 14 % to 3 %, enhance interlayer bonding strength, and result in a 54.17 % increase in interlaminar shear strength. Better interlaminar properties have positive implications for other mechanical properties, e.g. the tensile strength and modulus can reach approximately 1254 MPa and 89 GPa, respectively.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111079"},"PeriodicalIF":8.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372193","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
Triple-network structured phase change composite based on “rod-brush” CNTs-CFs with high thermal conductivity
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-27 DOI: 10.1016/j.compscitech.2025.111080
Xiaoling He , Wenjian Zhang , Yuanjun Yang , Guannan Yang , Yu Zhang , Guanghan Huang , Jiye Luo , Chengqiang Cui , Xinxin Sheng
{"title":"Triple-network structured phase change composite based on “rod-brush” CNTs-CFs with high thermal conductivity","authors":"Xiaoling He ,&nbsp;Wenjian Zhang ,&nbsp;Yuanjun Yang ,&nbsp;Guannan Yang ,&nbsp;Yu Zhang ,&nbsp;Guanghan Huang ,&nbsp;Jiye Luo ,&nbsp;Chengqiang Cui ,&nbsp;Xinxin Sheng","doi":"10.1016/j.compscitech.2025.111080","DOIUrl":"10.1016/j.compscitech.2025.111080","url":null,"abstract":"<div><div>The thermal management challenge in microelectronic products is a critical issue that must be addressed in the future era of intelligent technology. In this study, a phase change composite (CNCC-10), featuring a triple-encapsulated phase change material network and dual thermal conductive channels, was developed by compounding custom “rod-brush” structured CFs-CNTs (carbon nanotubes were grown on the surface of carbon fiber) filler with n-Docosane, ethylene propylene diene monomer, and metal foam via vacuum impregnation and hot pressing. The resulting material demonstrates remarkable shape stability alongside a high thermal conductivity of 3.15 W⋅m<sup>−1</sup>⋅K<sup>−1</sup>. In simulated chip operation tests, CNCC-10 not only delayed the rise in chip operating temperature but also steadily and consistently reduced the chip's working temperature by 12 °C. Under conditions of intense heat release and transient high-energy thermal shocks, CNCC-10 decreased the chip's working temperature by 23.15 °C and 50.1 °C, respectively, addressing the heating challenges under varying conditions. The integration of high thermal conductivity with phase change driven intelligent temperature control enables CNCC-10 to deliver exceptional chip thermal management performance and multi-source drive thermal management capabilities. This study provides a valuable reference for designing multifunctional thermal management materials for applications such as microelectronic devices, and artificial intelligence systems.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111080"},"PeriodicalIF":8.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092889","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
Assembly of PAN/Gr@MWCNTs/CoFe2O4 multilayer composite films for high-efficiency electromagnetic shielding and Joule heating
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-27 DOI: 10.1016/j.compscitech.2025.111081
Siwen Deng , Mingyao Dai , Bodu Fang , Yanqin Huang , Shulong Zeng , Zhunan Huang , Jiahui Xue , Xiaodong Li , Shaohong Shi , Fangchao Cheng
{"title":"Assembly of PAN/Gr@MWCNTs/CoFe2O4 multilayer composite films for high-efficiency electromagnetic shielding and Joule heating","authors":"Siwen Deng ,&nbsp;Mingyao Dai ,&nbsp;Bodu Fang ,&nbsp;Yanqin Huang ,&nbsp;Shulong Zeng ,&nbsp;Zhunan Huang ,&nbsp;Jiahui Xue ,&nbsp;Xiaodong Li ,&nbsp;Shaohong Shi ,&nbsp;Fangchao Cheng","doi":"10.1016/j.compscitech.2025.111081","DOIUrl":"10.1016/j.compscitech.2025.111081","url":null,"abstract":"<div><div>Creating novel, high-efficiency and multi-functional electromagnetic interference (EMI) shielding materials with high absorption attenuation is crucially important for integrated electronic devices. Herein, heterogeneous polyacrylonitrile (PAN)/graphene (Gr)@multi-walled carbon nanotubes (MWCNTs)/CoFe<sub>2</sub>O<sub>4</sub> multilayer films featuring electric-magnetic coupling were fabricated through a facile vacuum filtration method. The asymmetric layered architecture was composed of a flexible PAN electrospun nanofiber mat, an electrically conductive hybrid of Gr@MWCNTs, and a layer of insulating CoFe<sub>2</sub>O<sub>4</sub> particles. The nanosized magnetic CoFe<sub>2</sub>O<sub>4</sub> particles with unique magnetic hysteresis loss and natural resonance were synthesized by hydrothermal method and deposited on the conductive layer, to improve the impedance matching and reduce the electromagnetic wave (EMW) reflection. As a consequence, after incorporating the CoFe<sub>2</sub>O<sub>4</sub> layer, the EMW absorption loss (SE<sub>A</sub>) was improved from 21.7 to 25.7 dB. Furthermore, the hybrid conductive network was regulated by altering the ratio of two-dimensional (2D) Gr to one-dimensional (1D) MWCNTs, to endow the well-designed multilayer films with a high EMI shielding effectiveness (SE) of 40.1 dB and a superior specific shielding effectiveness (SSE) of 326.3 dB/mm. By virtue of the fine-tuned Gr@MWCNTs conductive network, the PAN/Gr@MWCNTs/CoFe<sub>2</sub>O<sub>4</sub> multilayer films exhibited excellent Joule heating performance, with high sensitivity, low driving voltage, rapid response, superior cycling stability and long-term durability. The multilayer films could be controllably heated to 114.1 °C within 5 s under a low input voltage of 3.00 V. This work presents a viable strategy for exploiting functional materials that exhibit excellent EMI shielding and thermal management performance, suitable for applications in electronics operating at extremely low temperatures.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111081"},"PeriodicalIF":8.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092887","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
Advanced Meta-Modeling framework combining Machine Learning and Model Order Reduction towards real-time virtual testing of woven composite laminates in nonlinear regime
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-25 DOI: 10.1016/j.compscitech.2025.111055
M. El Fallaki Idrissi , A. Pasquale , F. Meraghni , F. Praud , F. Chinesta
{"title":"Advanced Meta-Modeling framework combining Machine Learning and Model Order Reduction towards real-time virtual testing of woven composite laminates in nonlinear regime","authors":"M. El Fallaki Idrissi ,&nbsp;A. Pasquale ,&nbsp;F. Meraghni ,&nbsp;F. Praud ,&nbsp;F. Chinesta","doi":"10.1016/j.compscitech.2025.111055","DOIUrl":"10.1016/j.compscitech.2025.111055","url":null,"abstract":"<div><div>This paper presents an advanced meta-modeling framework that efficiently combines Machine Learning and Model Order Reduction (MOR) techniques for real-time virtual testing of woven composite materials. The framework is specifically designed to develop a multiparametric solution capable of accurately predicting the macroscopic nonlinear stress–strain curves of woven composite laminates submitted to loading–unloading paths. It takes into account five key microstructural parameters: yarn weft width, yarn warp width, yarn spacing, fabric thickness as well as the reinforcement orientation. The methodology employs the Proper Orthogonal Decomposition (POD) technique to decompose the stress–strain curves, extracting principal features that effectively characterize the overall composite’s response. Subsequently, a Random Forest machine learning model is applied to interpolate these features across the microstructural parameter space, allowing for rapid retrieval of corresponding features for any new laminate configuration in the nonlinear regime. A key advantages of this approach is its capacity to dynamically generate extensive virtual test databases, in real-time, across a wide range of composite laminate configurations. This capability provides a comprehensive and efficient tool for analyzing and optimizing composite performance while substantially reducing both experimental and computational costs. Furthermore, to enhance usability for engineers and researchers, this multiparametric solution has been integrated into a user-friendly Graphical User Interface (GUI) application. This GUI empowers users to easily explore various laminate configurations, visualize results, and conduct virtual testing, establishing the framework as a powerful tool for real-time virtual testing and in-depth analysis of microstructural effects on composite materials.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111055"},"PeriodicalIF":8.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092891","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
Numerical simulation of heat transfer of highly filled composites with spherical alumina fillers
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-25 DOI: 10.1016/j.compscitech.2025.111064
Ruoyu Zong , Bin Liu , Shijun Wang , Xiao Jia , Shikun Li , Xiulan Huai
{"title":"Numerical simulation of heat transfer of highly filled composites with spherical alumina fillers","authors":"Ruoyu Zong ,&nbsp;Bin Liu ,&nbsp;Shijun Wang ,&nbsp;Xiao Jia ,&nbsp;Shikun Li ,&nbsp;Xiulan Huai","doi":"10.1016/j.compscitech.2025.111064","DOIUrl":"10.1016/j.compscitech.2025.111064","url":null,"abstract":"<div><div>By employing the molecular dynamics based Modified Sequential Absorption (MSA) algorithm, the 3D models containing high volume fraction spherical <span><math><mrow><msub><mrow><mi>Al</mi></mrow><mrow><mi>2</mi></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mi>3</mi></mrow></msub><mo>/</mo><mi>SR</mi></mrow></math></span> fillers (up to 62.41 vol%) were established for simulating the thermal performances of the composites. The formation probability of thermal conductive pathway inside the material was quantitatively characterized by the particle contact probability, where the effective contact was determined by a dimensionless comprehensive influencing parameter. Then, the effects of volume fraction, contact situation between fillers, interfacial thermal resistance, and the binary filling scheme on thermal conductivity of the composite material were investigated. Increasing the volume fraction can remarkably improve the thermal conductivity of composite materials. However, improvement of filler-filler contact and the filler-matrix contact shows less profit. The optimal proportion of small particles in the binary mixtures shows consistency at different volume fractions and the thermal conductivity of the composites steadily increases with the increase of the diameter ratio of two-sized fillers. This work is beneficial to understand the thermal conductive mechanism and guide the performance optimization of composites.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"263 ","pages":"Article 111064"},"PeriodicalIF":8.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158611","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
Breathable and highly sensitive self-powered pressure sensors for wearable electronics and human-machine interaction
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-23 DOI: 10.1016/j.compscitech.2025.111078
Lijun Wu , Jinrong Huang , Yiqun Chen , Tong Wang , Jianwen Chen , Xiaohua Chang , Zenghe Liu , Zunfeng Liu , Yutian Zhu
{"title":"Breathable and highly sensitive self-powered pressure sensors for wearable electronics and human-machine interaction","authors":"Lijun Wu ,&nbsp;Jinrong Huang ,&nbsp;Yiqun Chen ,&nbsp;Tong Wang ,&nbsp;Jianwen Chen ,&nbsp;Xiaohua Chang ,&nbsp;Zenghe Liu ,&nbsp;Zunfeng Liu ,&nbsp;Yutian Zhu","doi":"10.1016/j.compscitech.2025.111078","DOIUrl":"10.1016/j.compscitech.2025.111078","url":null,"abstract":"<div><div>Self-powered pressure sensors have gained significant attention for their transformative potential in wearable electronics, Internet of Things (IoT) devices, and artificial e-skins. However, attaining high sensitivity while maintaining good breathability has proven to be a formidable challenge. In this study, we design a hierarchically structured all-nanofiber self-powered pressure sensor utilizing the triboelectric and electrostatic induction principles. The sensor is fabricated via an electrospinning process and consists of a multi-layered architecture comprising nanofiber membranes (NMs): a polyvinylidene fluoride/graphene NM as the negative friction layer, an ethyl cellulose/polyvinyl polypyrrolidone NM as the positive friction layer, and silver nanowire-loaded polyurethane NMs as the electrode layers. This innovative all-nanofiber design not only ensures remarkable breathability but also achieves outstanding sensitivity (15.91 V/kPa) and low detection limits (0.0044 N and 1°), attributed to the enhanced surface roughness and amplified surface charge potential of the friction layer. The sensor demonstrates its versatility by accurately monitoring various human motions and performing dual-language character recognition (Chinese and English), highlighting its vast potential for applications in wearable electronics, human-machine interaction, and next-generation e-skins.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111078"},"PeriodicalIF":8.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093036","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
Inspired by adipose tissue, mechanically robust and reprocessable LM-based composites for ultra-sensitive flexible pressure sensors
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-21 DOI: 10.1016/j.compscitech.2025.111061
Zequan Li , Fangyan Ou , Zhichao Zhang , Chuang Ning , Fuqi Wang , Ting Xie , Wenyu Pan , Zhuan zhang , Qihua Liang , Shuangliang Zhao , Wei Gao
{"title":"Inspired by adipose tissue, mechanically robust and reprocessable LM-based composites for ultra-sensitive flexible pressure sensors","authors":"Zequan Li ,&nbsp;Fangyan Ou ,&nbsp;Zhichao Zhang ,&nbsp;Chuang Ning ,&nbsp;Fuqi Wang ,&nbsp;Ting Xie ,&nbsp;Wenyu Pan ,&nbsp;Zhuan zhang ,&nbsp;Qihua Liang ,&nbsp;Shuangliang Zhao ,&nbsp;Wei Gao","doi":"10.1016/j.compscitech.2025.111061","DOIUrl":"10.1016/j.compscitech.2025.111061","url":null,"abstract":"<div><div>The self-healing conductive elastomers can self-healing when subjected to external damage, making them popular candidate for flexible electronic device materials. However, their insufficient mechanical and self-healing properties limit practical applications. Therefore, it is urgent to develop self-healing conductive elastomer materials with mechanical stability. In this word, inspired by the two-phase structure of adipose tissue, a self-healing elastomer (SBS-TA-7%) with excellent mechanical properties was prepared by simple grafting modification of styrene-butadiene-styrene block copolymer (SBS). The synergistic effect of hydrogen bonding, imine bonding and π-π stacking enhances the interactions of the polymer network, enabling rapid repair after damage and improving the self-healing ability and mechanical properties of the material. The SBS-TA-7% elastomers exhibit excellent self-healing capabilities, reaching a self-healing efficiency of 97.38 %. Compared to unmodified SBS, the strength and toughness of SBS-TA-7% were increased by 42 times (4.19 MPa) and 13.5 times (20.65 MJ/m<sup>3</sup>), respectively. On this basis, self-healing conductive elastomers (SBS-TA-7%/LM) with excellent mechanical and conductive properties were further prepared by introducing liquid metal (LM) into SBS-TA-7%. The SBS-TA-7%/LM based self-healing pressure sensors offer high response values (536), fast response/recovery speeds (60/130 ms) and low pressure detection (0.03 kPa).The SBS-TA-7%/LM-based pressure sensing array monitors the pressure distribution of objects and plantar pressure distribution in different postures. The 8 different walking postures were identified by machine learning, and the recognition rate was as high as 98.1 %. This study provides valuable insights into the design of self-healing elastomers and expands the application field of self-healing conductive elastomers in green pressure sensors.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111061"},"PeriodicalIF":8.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092894","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
Characterizing strain-rate dependent longitudinal compressive property of carbon fiber composite tows using a novel test method
IF 8.3 1区 材料科学
Composites Science and Technology Pub Date : 2025-01-21 DOI: 10.1016/j.compscitech.2025.111077
Jiahui Gu , Yang Bai , Hang Wu , Zhenqiang Zhao , Chao Zhang
{"title":"Characterizing strain-rate dependent longitudinal compressive property of carbon fiber composite tows using a novel test method","authors":"Jiahui Gu ,&nbsp;Yang Bai ,&nbsp;Hang Wu ,&nbsp;Zhenqiang Zhao ,&nbsp;Chao Zhang","doi":"10.1016/j.compscitech.2025.111077","DOIUrl":"10.1016/j.compscitech.2025.111077","url":null,"abstract":"<div><div>The dynamic mechanical properties of composite tows, which bear the primary external loads and absorb a significant portion of energy, directly influence the impact resistance of textile composites. To the best of our understanding, this is the first exploratory study introducing a dynamic longitudinal compression test method for composite tows, based on a Split Hopkinson Pressure Bar (SHPB) system. The optimal fabrication method for composite tows has been ascertained through comparative analysis and characterization. Following experimental and numerical analyses, a dumbbell-shaped configuration has been validated for compression specimens, as it not only facilitates effective compression failure modes and stress equilibrium but also satisfies the other fundamental requirements of SHPB tests. Additionally, the percent bending of composite tows under compression was assessed utilizing an innovative dual-reflector method. Experimental results indicate that the dynamic compressive strength and failure strain at 700 s<sup>−1</sup> exhibit a significant increase of approximately 116% and 110%, respectively, in comparison to the quasi-static condition at 1.5 × 10<sup>−5</sup> s<sup>−1</sup>. Furthermore, a series of morphological examinations and analyses were performed to comprehend the rationale behind their disparities at diverse strain rates. The results reveal that kink bands and longitudinal splitting constitute the primary failure modes in dynamic compression, while fiber kinking emerges as the predominant mode under quasi-static loadings.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"262 ","pages":"Article 111077"},"PeriodicalIF":8.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143127847","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
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