Composites Part B: Engineering最新文献

{"title":"Unveiling the anisotropy and mechanism of magnetic alignment of graphene in polymer composites for efficient absorption of THz radiations (0.3–3.0 THz)","authors":"Premika Govindaraj ,&nbsp;Sleeba Varghese ,&nbsp;Anna Sokolova ,&nbsp;Molong Han ,&nbsp;Saulius Juodkazis ,&nbsp;Dominique Appadoo ,&nbsp;Franz Konstantin Fuss ,&nbsp;Nisa Salim ,&nbsp;Nishar Hameed","doi":"10.1016/j.compositesb.2025.112739","DOIUrl":"10.1016/j.compositesb.2025.112739","url":null,"abstract":"<div><div>Flexible polymer films containing highly aligned graphene flakes were designed using low magnetic field for Terahertz (THz) shielding applications. The alignment of graphene resulted in a unique dark-bright field macroscopic patterns on the cured composite films. On a microscopic scale, the alignment of graphene resulted in a distinctive chain-like structure that favour an effective electron flow path resulting in an electron mobility and optimal electrical conductivity of 7.2 cm²/Vs and 3.3 x 10⁻⁷ S/cm, respectively, which is extremely higher than the homogenous composite for the lowest graphene loading of 1 wt%. For the first time, an aligned composite film of 100 μm thickness was characterised using the synchrotron beam in the THz regime – 0.3 to 3.0 THz and exhibited an exceptionally high absorptance of 56.6 % of T-rays for 1 wt% graphene concentration. Simultaneously, the mechanism of orientation and the <em>in-situ</em> alignment of graphene in the magnetic field was characterised using the time-of-flight small angle neutron scattering technique and their probability of alignment, anisotropy factor were estimated. The <em>in-situ</em> neutron experiments indicate that when the applied magnetic field is perpendicular to the wave vector of the incoming neutron beam, a pronounced anisotropy is observed in the total unpolarized beam due to the alignment of graphene flakes. The exploration of magnetic alignment of graphene and determination of optical anisotropy lays foundation for further discovery of aligned graphene-based composite. The outstanding performance and high efficiency of aligned graphene composites present a huge potential in THz devices, polarization control and shielding solutions for T-rays.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112739"},"PeriodicalIF":12.7,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563045","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}

{"title":"Core-shell BN/SCF architecture with phonon-electronic dual conduction pathways for synergistic enhancement of thermal conductivity, EMI shielding and mechanical properties in CF/EP composites","authors":"Jiamei Luo ,&nbsp;Yi Xue ,&nbsp;Chenxi Yang ,&nbsp;Yong Liu ,&nbsp;Liying Zhang ,&nbsp;Hui Zhang ,&nbsp;Jianyong Yu","doi":"10.1016/j.compositesb.2025.112747","DOIUrl":"10.1016/j.compositesb.2025.112747","url":null,"abstract":"<div><div>The urgent demand for reliable thermal management, electromagnetic interference (EMI) shielding and mechanical properties in aerospace electronics operating under extreme conditions drives the development of advanced multifunctional composites. Herein, the core-shell boron nitride/short carbon fiber (BN/SCF), synthesized via diazonium coupling and electrostatic assembly, is strategically aligned onto CF felts using a high-voltage electric field. Subsequent lamination with CF cloth and vacuum-assisted resin infusion (VARI) molding to fabricate multifunctional carbon fiber/epoxy resin (CF/EP) composites. The three-dimensional CF felt establishes thermal conduction bridges within EP interlayers, effectively mitigating the intrinsic limitation of out-of-plane thermal conductive. Concurrently, the BN nanoplates coated onto SCF enhance EP phonon transport via architecturally ordered crystalline lattice alignment, while oriented SCFs extend phonon pathways, collectively establishing phonon-electron dual thermal channels. Consequently, the CF/EP composites achieved optimal out-of-plane and in-plane thermal conductivities of 1.20 and 14.08 W m⁻¹ K⁻¹. The unique core-shell BN/SCF promotes multiple reflections of electromagnetic waves (EMWs) through an energy band structure mismatch between the wide bandgap BN and conductive SCF, and BN dielectric polarization, achieving exceptional shielding effectiveness (SE) of 50.06 dB, which was a 63.33 % improvement over the original CF/EP composites (30.65 dB). Moreover, the core-shell BN/SCF acts as rivet-like reinforcements, suppressing crack propagation through synergistic mechanical interlocking and chemical bonding, achieving 35.50 % and 97.35 % enhancement in ILSS and mode II toughness compared to original CF/EP. This multiscale structural engineering strategy demonstrates a material-level solution to fulfill the multifunctional requirements of next-generation aerospace systems operating under extreme environment conditions.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112747"},"PeriodicalIF":12.7,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501746","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}

{"title":"Insights into low-impurity activated carbon materials for supercapacitors with high-voltage and ultra-long cycle stability","authors":"Kye-yeol Lee ,&nbsp;Jae-Hyun Noh ,&nbsp;Keon-Ho Kong ,&nbsp;Sivaprakasam Radhakrishnan ,&nbsp;Dong Min Sung ,&nbsp;Taeuk Kim ,&nbsp;Kidon Nam ,&nbsp;Hye-Min Lee ,&nbsp;Byoung-Suhk Kim","doi":"10.1016/j.compositesb.2025.112750","DOIUrl":"10.1016/j.compositesb.2025.112750","url":null,"abstract":"<div><div>Ensuring the long-term cycling stability of energy storage devices requires rigorous purity control of active carbon (AC) materials, making it a critical aspect of the manufacturing process. However, despite the presence of naturally occurring impurities in biomass-derived ACs, limited research has focused on effective purification methods for ACs used in supercapacitor applications. In this study, we present a simple hydrothermal purification method using only deionized (DI) water to remove both metallic and non-metallic impurities. By utilizing the enhanced self-ionization and high fluidity of water molecules under elevated hydrothermal conditions, this process achieved a higher purification efficiency (∼94.5 %) than conventional chemical purification methods (∼92.1 %), with minimal textural changes of the ACs. Quantitative analysis of 17 impurity elements via ICP-OES, along with excellent capacitance retention of 86.7 % after 100,000 cycles in an acetonitrile-based electrolyte, demonstrates the effectiveness of this straightforward, environmentally friendly strategy for impurity control and long-term electrochemical stability.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112750"},"PeriodicalIF":12.7,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144511048","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}

{"title":"Synergistic radical-mediated algal inactivation via FeMoS2/ZnO-persulfate visible-light photocatalysis","authors":"Yingjian Ma ,&nbsp;Yuxuan Tian ,&nbsp;Ning Ding ,&nbsp;Hong Liu","doi":"10.1016/j.compositesb.2025.112740","DOIUrl":"10.1016/j.compositesb.2025.112740","url":null,"abstract":"<div><div>FeMoS₂/ZnO heterojunction photocatalysts were successfully prepared by hydrothermal synthesis. Scanning electron microscopy (SEM) study revealed that a 3-dimensional porous structure was formed by the uniform distribution of ZnO nanoparticles on the surface of FeMoS₂ nanosheets; the distinctive diffraction peaks of ZnO and FeMoS₂ were concurrently visible in X-ray diffraction (XRD) patterns, verifying that there were no notable alterations to the two crystal structures during the composite's creation procedure. The successful doping of Fe was validated by an examination using XPS. As demonstrated by UV–Vis DRS, the composite material's light absorption edge was red-shifted from 650 nm to 720 nm in pure FeMoS₂, and the band gap width decreased from 1.85 eV to 1.72 eV. These findings suggested that the addition of ZnO had greatly increased sensitivity of the material to the visible light spectrum. The variations in malondialdehyde (MDA), superoxide dismutase (SOD), zeta potential, phycobiliprotein and SEM physiological indexes during the catalytic process were detected, and the cell shape of Chlorella vulgaris was found to be significantly harmed by the FeMoS₂/ZnO/PDS/Vis system. Analysis using free radical trapping and EPR revealed that the primary active species in this system's algal inactivation mechanism were hydroxyl radicals (HO•). In light of these findings, a possible response mechanism for the FeMoS₂/ZnO/PDS/Vis inactivation of algae was put forth.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112740"},"PeriodicalIF":12.7,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501744","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}

{"title":"Multi-dimensional evaluation of phosphorus oxidation state and loading effects on the fire safety of carbon fiber reinforced aviation epoxy resin via control variables experiment","authors":"Bin Zou ,&nbsp;Xiaochuan Li ,&nbsp;Xiaodong Qian ,&nbsp;Xiangliang Tian ,&nbsp;Shuilai Qiu ,&nbsp;Yifan Zhou ,&nbsp;Siyu Zhu ,&nbsp;Jiajun Li ,&nbsp;Yuan Hu","doi":"10.1016/j.compositesb.2025.112743","DOIUrl":"10.1016/j.compositesb.2025.112743","url":null,"abstract":"<div><div>Understanding how multiple variables of flame retardants affect the fire hazards of their composites is essential for quantifying fire risks of cabin materials and aircraft overall. Incorporating flame retardants is typically required to meet stringent fire safety standards of booming epoxy resin carbon fiber composites (EP/CF) for aviation applications. This work synthesizes a new flame retardant PDDO through a substitution reaction between anhydrous piperazine and diphenylphosphoryl chloride, which has an overlapping pyrolysis characteristic with a deviation of 7.42 % in peak pyrolysis temperature, and that of corresponding EP/CF composites is 6.02 %. Incorporating only 5 wt% PDDO into EP/CF reaches a V-0 rating in the UL-94 and 54 % of LOI, exceeding that of introducing 11 wt% RDP. In comparison to neat EP at 25 kW/m², the peak heat release and total heat release of EP/CF-RDP are separately reduced by 74.38 % and 72.41 %, while EP/CF-PDDO shows reductions of 77.78 % and 73.93 %, respectively. The smoke density of EP/CF-RDP and EP/CF-PDDO is lower than that of neat EP, but they are separately increased by 59.36 % and 15.50 % compared to EP/CF due to the additional gas-phase effects caused by the flame retardants. A multi-dimensional and subject-objective combined model is established, the evaluation of fire hazard value of EP/CF-RDP and EP/CF-PDDO separately decreases by 60.66 % and 63.17 % compared to neat EP. This study elucidates the combined impact of phosphorus valence state, additive content and thermal stability of flame retardant on the fire hazard of composites, providing a foundation for flame retardant selection and fire hazard assessment for aircraft materials.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112743"},"PeriodicalIF":12.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501751","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}

{"title":"Numerical study addressing the CER effect on microscopic chip removal mechanisms of CFRPs via the orthogonal cutting","authors":"Jinyang Xu ,&nbsp;Jiaxin Shen ,&nbsp;Norbert Geier ,&nbsp;J. Paulo Davim ,&nbsp;Ming Chen","doi":"10.1016/j.compositesb.2025.112745","DOIUrl":"10.1016/j.compositesb.2025.112745","url":null,"abstract":"<div><div>Understanding the microscopic mechanisms of fiber fracture and removal plays a vital role in optimizing the cutting process and tool wear progression of carbon fiber reinforced polymers (CFRPs). Cutting edge radius (CER) is a critical parameter determining the surface formation of CFRPs as chip removal takes place by the action of cutting edge. In this study, micro-mechanical finite element (FE) models based on the maximum stress criteria were developed to reveal the influences of CER on fiber removal mechanisms governing the orthogonal cutting of UD-CFRPs. The results show that the CER significantly impacts both the transition of fiber removal modes and subsurface damage formation in CFRP cutting. At the 0° fiber orientation, increasing the CER tends to intensify the compression-induced fracture for fiber layers interacting with the tool. While for 45° and 90° fiber orientations, the key fiber separation mode changes from shear-induced fracture to bending-induced fracture as the CER rises. For the 135° fiber orientation, chip removal faces the greatest difficulty, with significant compressing and squeezing effects occurring, leading to poor fiber breakage and severe subsurface damage. Moreover, a smaller CER benefits the reduction of subsurface damage but increases the risk of edge chipping due to higher stresses concentrating at the cutting edge.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112745"},"PeriodicalIF":12.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631210","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}

{"title":"Regulating interface structure and shear performance of extruded NiTi fiber reinforced Al-based composites via heat treatments","authors":"Zhen Zhang ,&nbsp;Cunsheng Zhang ,&nbsp;Liang Chen ,&nbsp;Sujuan Zhong ,&nbsp;Guoqun Zhao","doi":"10.1016/j.compositesb.2025.112741","DOIUrl":"10.1016/j.compositesb.2025.112741","url":null,"abstract":"<div><div>Superior interfacial bonding is necessary to improve the performance of aluminum matrix composites. In this work, the Al/NiTi composite plate was fabricated by a novel composite extrusion technique, and the effects of heat treatment parameters on the interfacial structure and shear failure behavior of the composite plates were systematically investigated. The results indicate that different heat treatment processes induce the formation of interface structures with significant differences in Al/NiTi composites. The annealed composite plate forms an inhomogeneous multilayer transition interface: Ti–O layer, Ti₂Ni and TiNi mixed layer, and discontinuous Al₃Ti layer. The discontinuous brittle intermetallic compounds weaken the interfacial bonding, resulting in mainly interface debonding. However, the failure mechanism of the directly aged composite becomes primarily matrix failure, accompanied by severe sliding friction and mechanical interlocking, attributed to the formation of aluminum-side fine grain zone and nanocrystalline/amorphous transition zone at the interface. The aged composite exhibits superior interfacial shear properties compared to extruded and annealed composites. <u>The structure-performance-mechanism correlation was established between interfacial structure and shear behavior in composite extruded plates, thus providing a strategy for obtaining Al/NiTi composites with excellent properties.</u></div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112741"},"PeriodicalIF":12.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519168","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}

{"title":"Enhancing mechanical properties of 2D carbon/carbon composites via ZIF-67@CNTs-modified interfacial Layers: Mechanisms and performance optimization","authors":"Zhaofan Zhou,&nbsp;Ruoxi Zhang,&nbsp;Yi Cao,&nbsp;Wenqi Liu,&nbsp;Dongfang Xu,&nbsp;Jinhua Lu,&nbsp;Xiyuan Yao","doi":"10.1016/j.compositesb.2025.112742","DOIUrl":"10.1016/j.compositesb.2025.112742","url":null,"abstract":"<div><div>The interfacial bonding condition significantly governs the mechanical properties and performance of carbon/carbon (C/C) composites. This study presents a novel approach for constructing an interfacial layer modified by carbon nanotubes (CNTs) on the surface of carbon fibers (CFs), utilizing cobalt 2-methylimidazole (ZIF-67) as a catalyst precursor. Subsequently, the morphology of the interfacial layer within the cloth-laminated C/C composites was characterized, and the macroscopic and microscopic mechanical properties of CNTs-modified C/C (CNTs-C/C) composites were investigated. The out-of-plane compressive strength (OCS) and the interlaminar shear strength (ILSS) of the CNTs-C/C composites increased to 380 ± 19 MPa and 30.96 ± 1.43 MPa, respectively. These values represent remarkable increases of 85.4 % and 91.2 % compared to the C/C composites. The nanoindentation and fiber push-in tests revealed substantial improvements in both the interfacial layer strength and interfacial shear strength (IFSS) of the CNTs-C/C composites. The reinforced interfacial layer not only enhances crack propagation resistance but also strengthens the fiber-matrix bonding, thereby promoting CFs pull-out behavior. Furthermore, the high-strength interfacial layer exhibits enhanced load transfer efficiency to the CFs, thereby improve the overall load-bearing capacity of the composites. Consequently, the CNTs-C/C composites demonstrate superior comprehensive mechanical properties, achieving a flexural strength of 315 ± 14 MPa, representing a 57.5 % enhancement compared to the C/C composites.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112742"},"PeriodicalIF":12.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490786","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}

{"title":"Novel copper-based nanocomposite coatings achieving autonomous damage reporting and solar-triggered self-healing for marine corrosion protection","authors":"Lin Cao ,&nbsp;Tong Wang ,&nbsp;Wei Wang ,&nbsp;Huimeng Feng ,&nbsp;Ruzheng Wang ,&nbsp;Yue Zhang ,&nbsp;Wen Li ,&nbsp;Shougang Chen","doi":"10.1016/j.compositesb.2025.112748","DOIUrl":"10.1016/j.compositesb.2025.112748","url":null,"abstract":"<div><div>Developing efficient self-healing corrosion-resistant coatings remains a major challenge in metal protection. Herein, we propose a novel micron/nano-scale strategy to fabricate core-shell composite nanofibers (PVB-PVP-Cu₂(OH)₃NO₃@Phen) via a one-step coaxial electrospinning process. The in-situ growth photothermal agent Cu₂(OH)₃NO₃ (CON) and corrosion indicator phenanthroline (Phen) are simultaneously integrated, forming a multifunctional system. Remarkably, this work reports the first successful in situ synthesis of CON nanoparticles through one-step electrospinning, with the photothermal conversion mechanism corroborated through both experimental and simulation approaches. Integrated into a thermal-responsive epoxy resin, the composite nanofibers enable autonomous corrosion detection and photothermal-triggered self-healing, markedly enhancing both healing efficiency and corrosion protection. The BP-CON@Phen/EP coating rapidly heats to 61.0 °C under simulated sunlight within 200 s, promoting chain mobility and achieving a 95.04 % self-healing efficiency. After 140 days of immersion, the coating maintains strong protective properties with a stable impedance of 5.3 × 10⁸ Ω cm². Additionally, BP-CON@Phen enhances the resistance of the epoxy coating to temperature fluctuations and cathodic disbondment. Molecular dynamics simulations further indicate that BP-CON@Phen effectively obstructs corrosive media penetration, sustaining long-term corrosion resistance. This novel design strategy holds significant potential for advancing self-healing and corrosion-resistant coatings, offering high-performance solutions for diverse surface protection applications.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112748"},"PeriodicalIF":12.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490787","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}

{"title":"Hydroxyl-induced fluorine substitution in low dielectric all-inorganic silica composites for high fidelity communication cables under extreme environments","authors":"Siqing Tong ,&nbsp;Yashan Zhang ,&nbsp;Chengyi Hou ,&nbsp;Qinghong Zhang ,&nbsp;Kerui Li ,&nbsp;Zhijie Jin ,&nbsp;Yaogang Li ,&nbsp;Hongzhi Wang","doi":"10.1016/j.compositesb.2025.112744","DOIUrl":"10.1016/j.compositesb.2025.112744","url":null,"abstract":"<div><div>All-inorganic quartz fiber reinforced silica with high temperature stability is a promising low dielectric material for high-fidelity communication cables in extreme environments. However, its dielectric properties are constrained by the inherent polarizable -<em>Si</em>-<em>O</em>- and -<em>Si</em>-OH, driving the urgent exploration of silica-based low-dielectric materials that go beyond merely adjusting the porous structure. Herein, a fluorine-substituted silica/quartz fiber composite (FS–SiO₂) is generated by developing an <em>in situ</em> vapor fluorine substitution (termed VFS) strategy. During the substitution process, highly polarizable -<em>Si</em>-OH of fluorosilane-modified SiO₂ is replaced with low-polarizability -<em>Si</em>-F bonds through a simple thermal treatment at 600 °C. As a result, the dielectric constant and loss were highly reduced to be 1.74 and 1.00 × 10⁻² at 20 MHz. The communication cable with the FS-SiO₂ dielectric layer exhibited a significantly low attenuation of 0.74 dB/m at the frequency of 12 GHz, outperforming the cable using pure silica/quartz fiber composites with the attenuation of 1.55 dB/m. Furthermore, the cable's attenuation and VSWR remained nearly constant even after ten thermal cycles at 550 °C or 4 h of operation at 300 °C.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"305 ","pages":"Article 112744"},"PeriodicalIF":12.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472033","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}