Composites Part A: Applied Science and Manufacturing最新文献

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Sizing of discontinuous natural fibers: Effect of sizing approach and sizing concentration on composite properties 不连续天然纤维的施胶:施胶方式和施胶浓度对复合材料性能的影响
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-15 DOI: 10.1016/j.compositesa.2025.109029
Sanjita Wasti , Caitlyn Clarkson , Eric Johnston , Yunqiao Pu , Samarthya Bhagia , Halil Tekinalp , Soydan Ozcan , Uday Vaidya
{"title":"Sizing of discontinuous natural fibers: Effect of sizing approach and sizing concentration on composite properties","authors":"Sanjita Wasti ,&nbsp;Caitlyn Clarkson ,&nbsp;Eric Johnston ,&nbsp;Yunqiao Pu ,&nbsp;Samarthya Bhagia ,&nbsp;Halil Tekinalp ,&nbsp;Soydan Ozcan ,&nbsp;Uday Vaidya","doi":"10.1016/j.compositesa.2025.109029","DOIUrl":"10.1016/j.compositesa.2025.109029","url":null,"abstract":"<div><div>Natural fiber reinforced composites (NFRCs) are gaining attention in automotive applications as an alternative to glass fiber composites due to their lightweight and renewable sourcing. However, the inherent hydrophilicity of natural fibers leads to poor compatibility with hydrophobic polymers which adversely affects the mechanical properties of the composites and can limit their application to non-structural parts. Sizing is a common approach used for synthetic fibers to improve the interface between fiber and matrix. However, there is limited study on the sizing of natural fibers, and hence the focus of this work. In this study, two different approaches to sizing discontinuous coir fibers were investigated, namely; (1) ex-situ sizing and (2) in-situ sizing. A commercial polypropylene (PP) based sizing agent was used and the effects of varying sizing solution concentrations (1.5, 2.5, and 3.5 wt%) on the properties of the composites was studied. Results showed that composites prepared via the in-situ sizing process had better fiber–matrix adhesion and improved tensile properties compared to ex-situ sized composites. On studying the effect of different sizing concentrations on composite properties, we found that the tensile strength of the composites increased (by ∼ 42 %) up to 2.5 wt% sizing concentration (in solution) and then decreased. However, the impact strength decreased significantly on increasing the sizing content beyond 1.5 wt% (by ∼ 40 %). Additionally, the study was further extended to investigate the effect of sizing on different NFRCs (coir, banana, and cottonized hemp fiber) where effectiveness of sizing was found to be influenced by the fiber surface morphology.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"197 ","pages":"Article 109029"},"PeriodicalIF":8.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microporous nitrogen-boron compound for epoxy-based composites with improved flame retardancy, toughness, dielectric properties, transparency, and UV shielding 用于环氧基复合材料的微孔氮硼化合物,具有改进的阻燃性,韧性,介电性能,透明度和紫外线屏蔽
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-15 DOI: 10.1016/j.compositesa.2025.109033
Jingjing Yang, Yifang Hua, Jingyu Zhang, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang
{"title":"Microporous nitrogen-boron compound for epoxy-based composites with improved flame retardancy, toughness, dielectric properties, transparency, and UV shielding","authors":"Jingjing Yang,&nbsp;Yifang Hua,&nbsp;Jingyu Zhang,&nbsp;Jun Sun,&nbsp;Hongfei Li,&nbsp;Xiaoyu Gu,&nbsp;Sheng Zhang","doi":"10.1016/j.compositesa.2025.109033","DOIUrl":"10.1016/j.compositesa.2025.109033","url":null,"abstract":"<div><div>Epoxy-based composites (EP composites) have long been essential in a range of thermoset applications. However, the increasing demands of emerging technologies call for multifunctional EP composites with enhanced properties. In this study, we prepared a highly effective microporous compound, BPT, containing nitrogen and boron to endow EP composites with multifunctionalities. The incorporation of 8 wt% BPT into EP composite increases the limiting oxygen index to 28.8 % and upgrades the UL-94 rating to V-0, due to the formation of a protective char layer that inhibits heat and oxygen transfer. Cone calorimeter tests demonstrate a remarkable reduction in peak heat release rate and total heat release by 55 % and 33 %, respectively. Moreover, the EP/BPT composite exhibits a 38 % reduction in total smoke production, a 45 % decrease in smoke production rate compared to the control EP. Mechanical properties are also significantly improved, with impact strength increasing from 9 kJ/m<sup>2</sup> to 12.4 kJ/m<sup>2</sup>. Additionally, the EP/BPT composite maintains high transparency, effective UV shielding, and reduced dielectric constant and loss. This multifunctional additive, synthesized through an efficient and practical method, offers a promising solution to fabricate advanced multifunctional EP composites.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"197 ","pages":"Article 109033"},"PeriodicalIF":8.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advanced continuous tow shearing process utilising in-line tow width control in fibre steering
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-11 DOI: 10.1016/j.compositesa.2025.109025
Michelle Rautmann, Edwin Rosario Gabriel, Byung Chul Kim
{"title":"Advanced continuous tow shearing process utilising in-line tow width control in fibre steering","authors":"Michelle Rautmann,&nbsp;Edwin Rosario Gabriel,&nbsp;Byung Chul Kim","doi":"10.1016/j.compositesa.2025.109025","DOIUrl":"10.1016/j.compositesa.2025.109025","url":null,"abstract":"<div><div>Although automated fibre placement (AFP) is one of the most advanced composite manufacturing technologies in the aerospace industry, it has critical limitations in fibre steering due to its principle of utilising the in-plane bending deformation of the tow. The Continuous Tow Shearing (CTS) process has effectively addressed fibre-steering defects by utilising the in-plane shear deformation of the tow. However, particularly when producing layups over a tool with complex geometry, both the AFP and CTS processes can generate geometry-induced defects, as the tool surface cannot be perfectly tessellated using finite-width tapes. These defects may significantly reduce the structural performance of the composite.</div><div>To eliminate both steering- and geometry-induced defects, a novel Tow Width Control (TWiC) mechanism was developed in this work. This mechanism allows for on-the-fly control of the tow’s cross-sectional aspect ratio without cutting fibres while maintaining a constant fibre volume fraction. The TWiC device was integrated into the Continuous Tow Shearing (CTS) process and its feasibility was experimentally investigated. To assess the steering quality and accuracy of this Advanced CTS (ACTS) process, the same fibre paths were laid using AFP and CTS processes and compared through optical and laser scanning methods. It was shown that the ACTS layup produces significantly less layup defects compared to AFP and CTS.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 109025"},"PeriodicalIF":8.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A model to describe transient transverse deformation during prepreg consolidation 描述预浸料固结过程中瞬态横向变形的模型
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-10 DOI: 10.1016/j.compositesa.2025.109021
Pavel Simacek , Shu Minakuchi , Suresh G. Advani
{"title":"A model to describe transient transverse deformation during prepreg consolidation","authors":"Pavel Simacek ,&nbsp;Shu Minakuchi ,&nbsp;Suresh G. Advani","doi":"10.1016/j.compositesa.2025.109021","DOIUrl":"10.1016/j.compositesa.2025.109021","url":null,"abstract":"<div><div>In automated tape placement or other prepreg layup methods, one of the manufacturing flaws manifests when the gap between adjacent tapes or prepreg sheets cause concave deformation on top of the gap during the consolidation step. Our previous model addressed the development of the gap as applied to tape placement process and predicted final deformation state was compared with experimental measurements after tape consolidation was complete. The transient deformation behavior could not be verified as it was not possible to measure at that time. Since then, a unique fiber optic shape sensor was developed that measures the in-situ deformation of a cross-ply thermosetting composite laminate containing gaps of various widths in the middle layer during the entire consolidation process. The related experimental work showed that our previous model assumption of elastic behavior of prepreg plies bridging the gap are invalid. To address this shortcoming, elastic stress relaxation was introduced into the model. To address wider gaps, it also proved necessary to add the contact between the bridging layers and substrate under the gap. In addition, transient viscosity model was also implemented as the necessary data for its characterization was also available.</div><div>The extended model parameters were found by successfully fitting the transient deformation to one experimental result. The transient results were then compared to the fiber optic in-situ sensor data obtained in additional cases. The comparison of model predictions with experimental data proved favorable.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"197 ","pages":"Article 109021"},"PeriodicalIF":8.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of the Ni transition layer on the SiCp/Fe-Cu sandwich structure: Promoting interfacial bonding and synergistically enhancing strength and ductility Ni过渡层对SiCp/Fe-Cu夹层结构的影响:促进界面结合,协同提高强度和延展性
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-09 DOI: 10.1016/j.compositesa.2025.109020
Wen-quan Li , Zheng-yu Zhong , Ying Guo , Shuo Yin , Chao Zhang
{"title":"Influence of the Ni transition layer on the SiCp/Fe-Cu sandwich structure: Promoting interfacial bonding and synergistically enhancing strength and ductility","authors":"Wen-quan Li ,&nbsp;Zheng-yu Zhong ,&nbsp;Ying Guo ,&nbsp;Shuo Yin ,&nbsp;Chao Zhang","doi":"10.1016/j.compositesa.2025.109020","DOIUrl":"10.1016/j.compositesa.2025.109020","url":null,"abstract":"<div><div>To obtain the material with excellent comprehensive properties, SiCp-reinforced iron-copper (SiCp/Fe-Cu) sandwich-structured composites were fabricated by spark plasma sintering. A Ni transition layer was added into the sandwich structure to enhance interfacial bonding. The results indicated that the Ni transition layer formed an amorphous interfacial product with Fe layer, resulting in tighter interfacial bonding. The introduced Cu layer significantly improved material’s thermal conductivity, with the sintered SiCp/Fe-Cu sandwich structure achieving 211.20% of the thermal conductivity of SiCp/Fe, and the SiCp/Fe-Ni-Cu sandwich structure reaching 232.32% of SiCp/Fe. The Ni transition layer brought the SiCp/Fe-Ni-Cu structure exceptional ductility, surpassing the SiCp/Fe-Cu structure by 180%. In both sandwich structures, phenomena of non-coordinated plastic deformation were observed; while the Cu layer exhibited through-cracks, the SiCp/Fe layer experienced local cracking. Each layer in the sandwich structures displayed different failure mechanisms: the Cu layer underwent shear fracture, while the SiCp/Fe layer experienced tensile fracture.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 109020"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Boosted high-temperature capacitive energy storage in D-A-D type semiconductor/polymer composite via constructing physical cross-linking and electronic trapping
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-09 DOI: 10.1016/j.compositesa.2025.109019
Xiwen Yang , Hang Luo , Sheng Chen , Jiajun Peng , Guanghu He , Ru Guo , Dou Zhang
{"title":"Boosted high-temperature capacitive energy storage in D-A-D type semiconductor/polymer composite via constructing physical cross-linking and electronic trapping","authors":"Xiwen Yang ,&nbsp;Hang Luo ,&nbsp;Sheng Chen ,&nbsp;Jiajun Peng ,&nbsp;Guanghu He ,&nbsp;Ru Guo ,&nbsp;Dou Zhang","doi":"10.1016/j.compositesa.2025.109019","DOIUrl":"10.1016/j.compositesa.2025.109019","url":null,"abstract":"<div><div>Nowadays, with the development of hybrid electric vehicles, aerospace, underground oil and gas exploration, and other fields, the demand for high-temperature dielectric energy storage equipment has rapidly increased. Although engineering aromatic polymers with high glass transition temperatures (<em>T</em><sub>g</sub>) have been developed, it is extremely urgent to solve the problem of the sharp decline in energy storage performance caused by the exponentially increased leakage current under high temperatures and electric fields. This work incorporates a semiconductor molecule with donor–acceptor-donor configuration (DPP-S) into the PEI matrix to achieve significantly enhanced high-temperature capacitive performance. The dense physical cross-linking networks are formed by the electrostatic interaction between the positively charged phenyl group in PEI and the electron-donating thiophene group in DPP-S, as well as the hydrogen bonding interaction between the amide group in DPP-S and the −C=O group in the PEI chain. This molecular interface effect improves mechanical strength to boost the breakdown strength and introduces trap sites capturing charge carriers to suppress leakage current. Consequently, excellent energy storage performance is achieved in PEI-DPP-S-0.2 wt%, e.g., discharge energy density of 4.87 J cm<sup>−3</sup> at 150 °C and 3.45 J cm<sup>−3</sup> at 200 °C with high discharge efficiency of 90 %, surpassing lots of high-temperature energy storage polymers. Finally, PEI-DPP-S-0.2 wt% exhibits stable performances during ultralong 10<sup>5</sup> charge–discharge cycles in harsh environments (200 MV m<sup>−1</sup> and 200 °C) and prospects for large-scale preparation. This work further deepens the insight of high-temperature dielectric energy storage enhanced by molecular interface engineering.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 109019"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual-engineered heat transfer pathways via ice-templating and hot-pressing for enhanced anisotropic thermal conductivity 双工程传热途径通过冰模板和热压增强各向异性导热性
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-09 DOI: 10.1016/j.compositesa.2025.109023
ZhiWei Ling , Qiuchen Wang , Bin Wu, Ru Xia, Jiasheng Qian
{"title":"Dual-engineered heat transfer pathways via ice-templating and hot-pressing for enhanced anisotropic thermal conductivity","authors":"ZhiWei Ling ,&nbsp;Qiuchen Wang ,&nbsp;Bin Wu,&nbsp;Ru Xia,&nbsp;Jiasheng Qian","doi":"10.1016/j.compositesa.2025.109023","DOIUrl":"10.1016/j.compositesa.2025.109023","url":null,"abstract":"<div><div>The ability to dissipate accumulated heat in integrated circuits determines the performance, safety, and service life of electronic devices. The regulation of orderly heat transfer pathways in composites is a breakthrough to improve the heat dissipation performance. Herein, the heat transfer property of PI-based composites along the horizontal direction was realized by twice regulation of ice-templating and hot-pressing on the transfer pathways composed of boron nitride-coated silver wires (AgNWs@BN-NH<sub>2</sub>). The in-plane thermal conductivity (4.14 W m<sup>−1</sup> K<sup>−1</sup>) of nearly 15 times greater than the through-plane thermal conductivity (0.28 W m<sup>−1</sup> K<sup>−1</sup>) manifested the anisotropic heat dissipation capacity of the AgNWs@BN-20/PI<sub>10</sub>. The heat transfer behavior of composites under pressure was further analyzed by finite element simulation. The change of the pressure value mapped in the model structure indicated that the secondary regulation achieved the optimal horizontal heat transfer effect. Due to the insulating and flame-retardant nature of BN-NH<sub>2</sub>, AgNWs@BN-20/PI<sub>10</sub> exhibited volume resistivity of over 10<sup>14</sup> Ω, limited oxygen index of ∼ 38 %, and peak heat release rate of less than 20 W g<sup>−1</sup>. This strategy offers a promising idea for the development of multifunctional polymer-based thermal management materials with directional heat transfer performance in the electronic applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 109023"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lightweight nano-metallized wood: Toward high-performance electromagnetic interference shielding with multifunctional attributes 轻质纳米金属化木材:向多功能高性能电磁干扰屏蔽方向发展
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-09 DOI: 10.1016/j.compositesa.2025.109012
Aizhen Wei, Chenchen Wang, Chuanshuang Hu, Xiuyi Lin, Yonghui Zhou, Xi Lin, Jiangtao Xu
{"title":"Lightweight nano-metallized wood: Toward high-performance electromagnetic interference shielding with multifunctional attributes","authors":"Aizhen Wei,&nbsp;Chenchen Wang,&nbsp;Chuanshuang Hu,&nbsp;Xiuyi Lin,&nbsp;Yonghui Zhou,&nbsp;Xi Lin,&nbsp;Jiangtao Xu","doi":"10.1016/j.compositesa.2025.109012","DOIUrl":"10.1016/j.compositesa.2025.109012","url":null,"abstract":"<div><div>The proliferation of electronic devices has heightened the demand for effective electromagnetic interference (EMI) shielding materials with lightweight and sustainable properties. This study presents the development of lightweight, nano-metallized wood with superior EMI shielding effectiveness, water repellency, and infrared shielding capabilities. <em>Balsa</em> wood was subjected to magnetron sputtering to deposit ultra-thin Cu and Ni metal films, achieving a total thickness of 100 nm. The Cu-Wood-Cu (Cu-W-Cu) structured material demonstrated the highest EMI shielding performance, with an average shielding effectiveness of 31.73 dB, surpassing commercial requirements. The material’s hydrophobicity was significantly enhanced, with water contact angles reaching up to 103.2°, attributed to the increased surface roughness. Infrared shielding performance was also notable, with the Cu-W-Cu material reflecting a majority of incident infrared radiation, reducing the surface temperature by 36.9 °C compared to the heating source. The study elucidates the material’s potential in practical EMI shielding applications, showcasing its effectiveness in blocking electromagnetic signals from a Tesla coil and mobile phone signals. The findings underscore the promise of these sustainable, lightweight wood-based materials in addressing multifaceted protection needs, including EMI shielding, water resistance, and thermal management.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 109012"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-cost multifunctional antimony-doped tin oxide/polyacrylamide-chitosan double-network hydrogels with good mechanical properties and excellent electromagnetic interference shielding performance in terahertz band 低成本多功能锑掺杂氧化锡/聚丙烯酰胺-壳聚糖双网水凝胶具有良好的力学性能和优异的太赫兹电磁干扰屏蔽性能
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-08 DOI: 10.1016/j.compositesa.2025.109018
Lin Mei , Wenchong Ouyang , Fan Zhou , Zhuochao Pan , Limin Xu , Yu Bai , Quanming Lu , Tianzhi Luo , Zhengwei Wu
{"title":"Low-cost multifunctional antimony-doped tin oxide/polyacrylamide-chitosan double-network hydrogels with good mechanical properties and excellent electromagnetic interference shielding performance in terahertz band","authors":"Lin Mei ,&nbsp;Wenchong Ouyang ,&nbsp;Fan Zhou ,&nbsp;Zhuochao Pan ,&nbsp;Limin Xu ,&nbsp;Yu Bai ,&nbsp;Quanming Lu ,&nbsp;Tianzhi Luo ,&nbsp;Zhengwei Wu","doi":"10.1016/j.compositesa.2025.109018","DOIUrl":"10.1016/j.compositesa.2025.109018","url":null,"abstract":"<div><div>Researchers have recently developed various methods to incorporate conductive fillers into hydrogel matrices, including metal-based fillers, carbon nanotubes, and two-dimensional materials like MXenes, significantly enhancing their electromagnetic interference (EMI) shielding properties. However, due to the high cost of these fillers, balancing the high EMI shielding (SE), excellent mechanical performance, and low production costs remains a significant challenge, hindering the widespread industrial application of such hydrogels. In this study, we fabricated antimony-doped tin oxide (ATO)/polyacrylamide (PAAm)-chitosan (CS) hydrogels using sodium citrate (Cit) for salting-out, forming double networks and molecular entanglement. The introduction of ATO and the salting-out effect of Cit not only endowed the hydrogel with excellent mechanical properties (strength &gt; 1.5 MPa) but also enhanced its conductivity and EMI shielding effectiveness while maintaining overall low production costs. The hydrogel achieved a 60.2 dB of EMI SE in the 0.1–1.0 THz range, with the price per milliliter of conductive filler being approximately 0.2 % of that in hydrogels incorporating MXenes or reduced graphene oxide. Notably, the hydrogel also demonstrated excellent strain-sensing capabilities. Combining the outstanding properties above, the gel presents a promising candidate for next-generation flexible electronic device shielding applications. It has significant potential for industrial adoption as a cost-effective EMI shielding material.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 109018"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Beyond layered limitations: A novel multi-thermal optimization framework of 3D-printed short carbon fiber-reinforced polyether-ether-ketone (SCF-PEEK) 超越分层限制:3d打印短碳纤维增强聚醚醚酮(SCF-PEEK)的新型多热优化框架
IF 8.1 2区 材料科学
Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-08 DOI: 10.1016/j.compositesa.2025.108948
Itamar Tulpan, Sahar Halevi, Amnon Shirizly, Galit Katarivas Levy
{"title":"Beyond layered limitations: A novel multi-thermal optimization framework of 3D-printed short carbon fiber-reinforced polyether-ether-ketone (SCF-PEEK)","authors":"Itamar Tulpan,&nbsp;Sahar Halevi,&nbsp;Amnon Shirizly,&nbsp;Galit Katarivas Levy","doi":"10.1016/j.compositesa.2025.108948","DOIUrl":"10.1016/j.compositesa.2025.108948","url":null,"abstract":"<div><div>Short carbon fiber-reinforced polyether-ether-ketone (SCF-PEEK) is a high-performance composite with excellent mechanical and thermal properties, making it a prime candidate for advanced applications in biomedical, aerospace, and automotive. However, fabricating 3D-printed SCF-PEEK using fused deposition modeling (FDM) is hindered by challenges such as poor interlayer adhesion, mechanical anisotropy, and suboptimal process parameters. This study introduces a novel multi-thermal parameter optimization framework leveraging an open-source FDM printer equipped with a direct annealing system (DAS). By systematically optimizing printing temperature, DAS temperature, and post-process heat treatment, the optimal parameters (printing: 440 °C, DAS: 440 °C, heat-treatment: 200 °C) yielded remarkable enhancements in interlayer adhesion and mechanical performance. Compression and tensile testing, along with density and differential scanning calorimetry analyses, confirmed consistent density (1.29–1.31 g⋅cm<sup>−3</sup>) and degree of crystallinity (26–36 %) across all fabrication conditions. DAS transformed the compression failure mechanism from a single shear fracture to a micro-buckling with interlayer and intralayer damage, while upright tensile fractures shifted from smooth to rough surfaces with thicker crystalline spherulites, indicating improved interlayer adhesion. Anisotropic mechanical behavior was evaluated in upright, 45°, and flat orientations under compression and tensile loads. Flat-oriented tensile samples exhibited the highest UTS and elastic modulus, while upright-oriented compressive samples had the highest UCS, and flat-oriented compressive samples showed the highest elastic modulus, attributed to fiber alignment. This study establishes a new benchmark for SCF-PEEK fabrication via FDM, highlighting the critical role of thermal optimization in enhancing mechanical durability and interlayer bonding while providing insights into the effects of orientation and fiber–matrix interactions on failure behavior.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"196 ","pages":"Article 108948"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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