Composites Science and Technology最新文献_第6页

Energy-efficient, highly robust anti-icing/de-icing composites and icing wind tunnel assessment

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

Composites Science and Technology

Pub Date : 2025-02-27 DOI: 10.1016/j.compscitech.2025.111121

Yunyun Meng , Nan Wu , Yanxin Zhang , Jinshui Yang , Song Wang , Suli Xing , Senyun Liu , Xian Yi

Superhydrophobic surfaces have been extensively developed as attractive anti-icing/de-icing candidate materials for fiber-reinforced polymer-based composites (FRPCs), thereby often being integrated with electrothermal effect to minimize its energy consumption. However, the structural incoordination between FRPC, superhydrophobic surfaces, and electric heating elements usually leads to high energy loss and low durability. Herein, a wet spraying method was proposed for the fabrication of robust superhydrophobic electrothermal films and that were subsequently endowed to the FRPC surfaces through pressure-assisted integrating molding. Our structural-functional integration strategy does not compromise the molding conditions and key components of FRPC, yielding a >95 % retention of the mechanical strength. Additionally, the electrothermal effect was proven well preserved, thereby enhancing the freezing-delaying effect of 1 + 1>2, reducing ice adhesion strength from 234 kPa to 5.4 kPa, and remaining unchanged superhydrophobicity after 100 cycles of icing/de-icing. The underlying mechanism can be attributed to thermal-governed heat and mass transfer at the interface facilitating synergistic regulation of phase transition and wettability of water/ice. Importantly, the practical value of multi-functionalized FRPC was assessed by icing wind tunnel, confirming the anti-icing effect at 0.3 W/cm² and 26 % reduction in de-icing energy consumption. The prepared energy-efficient and highly robust anti-icing/de-icing FRPC should satisfy the growing demands in the aviation and energy fields.

{"title":"Energy-efficient, highly robust anti-icing/de-icing composites and icing wind tunnel assessment","authors":"Yunyun Meng , Nan Wu , Yanxin Zhang , Jinshui Yang , Song Wang , Suli Xing , Senyun Liu , Xian Yi","doi":"10.1016/j.compscitech.2025.111121","DOIUrl":"10.1016/j.compscitech.2025.111121","url":null,"abstract":"<div><div>Superhydrophobic surfaces have been extensively developed as attractive anti-icing/de-icing candidate materials for fiber-reinforced polymer-based composites (FRPCs), thereby often being integrated with electrothermal effect to minimize its energy consumption. However, the structural incoordination between FRPC, superhydrophobic surfaces, and electric heating elements usually leads to high energy loss and low durability. Herein, a wet spraying method was proposed for the fabrication of robust superhydrophobic electrothermal films and that were subsequently endowed to the FRPC surfaces through pressure-assisted integrating molding. Our structural-functional integration strategy does not compromise the molding conditions and key components of FRPC, yielding a >95 % retention of the mechanical strength. Additionally, the electrothermal effect was proven well preserved, thereby enhancing the freezing-delaying effect of 1 + 1>2, reducing ice adhesion strength from 234 kPa to 5.4 kPa, and remaining unchanged superhydrophobicity after 100 cycles of icing/de-icing. The underlying mechanism can be attributed to thermal-governed heat and mass transfer at the interface facilitating synergistic regulation of phase transition and wettability of water/ice. Importantly, the practical value of multi-functionalized FRPC was assessed by icing wind tunnel, confirming the anti-icing effect at 0.3 W/cm<sup>2</sup> and 26 % reduction in de-icing energy consumption. The prepared energy-efficient and highly robust anti-icing/de-icing FRPC should satisfy the growing demands in the aviation and energy fields.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111121"},"PeriodicalIF":8.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534117","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

On the development of mode II interlaminar damage-tolerant additive manufactured continuous fiber-reinforced polymers: An interlaminar hybridization strategy

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

Composites Science and Technology

Pub Date : 2025-02-26 DOI: 10.1016/j.compscitech.2025.111126

Ali Delbariani-Nejad , Lin Ye , Yi Xiong

Weak interlaminar bonding in 3D-printed continuous fiber-reinforced polymers (CFRP) results from inadequate interdiffusion during fabrication, leading to delamination, which is the most catastrophic failure mode. This poses a significant limitation in the application of 3D-printed CFRP. While recent studies have focused primarily on characterizing fracture toughness, a substantial gap remains in developing innovative interlaminar damage-tolerant designs. The main contribution of this study is to implement an interlaminar hybridization strategy using a co-extrusion process that integrates carbon fibers, known for their low toughness, with Kevlar, which offers superior fracture toughness, to improve resistance to mode II delamination propagation. End-notched flexure (ENF) tests are conducted to characterize the initiation and propagation fracture toughness at pure carbon (C//C), pure Kevlar (K//K), and hybrid (C//K) interfaces using the compliance calibration method (CCM), direct beam theory (DBT), and compliance-based beam theory (CBBM). The most significant finding is that hybridization results in a remarkable difference of 709% in propagation toughness at the C//K interface, demonstrating a rising R-curve compared to the unstable delamination growth observed at the C//C interface.Fractographic analysis indicates that extensive Kevlar bridging behind the crack tip is the primary toughening mechanism. Furthermore, hybridization creates an intrinsic fracture process zone ahead of the crack, significantly enhancing energy absorption. The interaction between carbon and Kevlar, which leads to carbon pull-out, is identified as a positive side effect of hybridization. These findings provide critical insights into interlaminar bonding mechanisms influenced by hybridization, highlighting the potential for next-generation 3D-printed composites in real applications employing a damage-tolerant design philosophy.

{"title":"On the development of mode II interlaminar damage-tolerant additive manufactured continuous fiber-reinforced polymers: An interlaminar hybridization strategy","authors":"Ali Delbariani-Nejad , Lin Ye , Yi Xiong","doi":"10.1016/j.compscitech.2025.111126","DOIUrl":"10.1016/j.compscitech.2025.111126","url":null,"abstract":"<div><div>Weak interlaminar bonding in 3D-printed continuous fiber-reinforced polymers (CFRP) results from inadequate interdiffusion during fabrication, leading to delamination, which is the most catastrophic failure mode. This poses a significant limitation in the application of 3D-printed CFRP. While recent studies have focused primarily on characterizing fracture toughness, a substantial gap remains in developing innovative interlaminar damage-tolerant designs. The main contribution of this study is to implement an interlaminar hybridization strategy using a co-extrusion process that integrates carbon fibers, known for their low toughness, with Kevlar, which offers superior fracture toughness, to improve resistance to mode II delamination propagation. End-notched flexure (ENF) tests are conducted to characterize the initiation and propagation fracture toughness at pure carbon (C//C), pure Kevlar (K//K), and hybrid (C//K) interfaces using the compliance calibration method (CCM), direct beam theory (DBT), and compliance-based beam theory (CBBM). The most significant finding is that hybridization results in a remarkable difference of 709% in propagation toughness at the C//K interface, demonstrating a rising R-curve compared to the unstable delamination growth observed at the C//C interface.Fractographic analysis indicates that extensive Kevlar bridging behind the crack tip is the primary toughening mechanism. Furthermore, hybridization creates an intrinsic fracture process zone ahead of the crack, significantly enhancing energy absorption. The interaction between carbon and Kevlar, which leads to carbon pull-out, is identified as a positive side effect of hybridization. These findings provide critical insights into interlaminar bonding mechanisms influenced by hybridization, highlighting the potential for next-generation 3D-printed composites in real applications employing a damage-tolerant design philosophy.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111126"},"PeriodicalIF":8.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529268","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

Conformal Al2O3 coating layer improves electrical insulation of the oriented carbon fibers arrays for highly thermally conductive interface materials

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

Composites Science and Technology

Pub Date : 2025-02-26 DOI: 10.1016/j.compscitech.2025.111128

Min Huang , Ruibang Xie , Zhiqian Wang , Chiyu Wen , Nizao Kong , Chenming Feng , Kaiwen Hou , Zongyun Shao , Fei Han

Mesophase pitch-based carbon fiber is highly sought after in electronic packaging applications due to its excellent thermal conductivity and mechanical properties. However, its poor electrical insulation limits its usage in certain electronic packaging applications. Herein, the carbon fiber is coated with insulating alumina (Al₂O₃) ceramic to improve the insulation properties of the thermal interface materials. The Al₂O₃ coating is formed directly onto the surface of carbon fiber using the sol-gel method and subsequent heat treatment, which substantially improves the insulation of the carbon fiber with an increased powder resistivity of nearly 42 times. Subsequently, the thermally conductive carbon fiber fillers are neatly aligned in the silicone rubber matrix along the vertical direction of heat transfer, which results in excellent properties of the prepared thermally conductive pads. The carbon fiber-filled pads exhibit a high thermal conductivity of 14.17 W m⁻¹ K⁻¹, a high resistivity of 1.12 × 10¹⁰ Ω cm, a medium breakdown voltage of 2.4 kV mm⁻¹, and a favorable compression ratio (@45 psi) of 54.7 %. This work offers a feasible approach for the development of carbon fiber fillers with integrated thermal conductivity and electrical insulation, leading to the expanded application of carbon fiber in electronic packaging.

介相沥青基碳纤维具有出色的导热性和机械性能，在电子封装应用中备受青睐。然而，其较差的电绝缘性限制了它在某些电子封装应用中的使用。在这里，碳纤维上涂有绝缘氧化铝（Al2O3）陶瓷，以改善热界面材料的绝缘性能。Al2O3 涂层采用溶胶-凝胶法直接形成于碳纤维表面，随后进行热处理，从而大幅提高了碳纤维的绝缘性能，粉末电阻率提高了近 42 倍。随后，导热碳纤维填料沿着热传导的垂直方向整齐地排列在硅橡胶基体中，从而使制备的导热垫具有优异的性能。碳纤维填充的导热垫具有 14.17 W m-1 K-1 的高热导率、1.12 × 1010 Ω cm 的高电阻率、2.4 kV mm-1 的中等击穿电压和 54.7 % 的良好压缩比（@45 psi）。这项工作为开发具有综合导热性和电绝缘性的碳纤维填料提供了一种可行的方法，从而扩大了碳纤维在电子封装中的应用。

{"title":"Conformal Al2O3 coating layer improves electrical insulation of the oriented carbon fibers arrays for highly thermally conductive interface materials","authors":"Min Huang , Ruibang Xie , Zhiqian Wang , Chiyu Wen , Nizao Kong , Chenming Feng , Kaiwen Hou , Zongyun Shao , Fei Han","doi":"10.1016/j.compscitech.2025.111128","DOIUrl":"10.1016/j.compscitech.2025.111128","url":null,"abstract":"<div><div>Mesophase pitch-based carbon fiber is highly sought after in electronic packaging applications due to its excellent thermal conductivity and mechanical properties. However, its poor electrical insulation limits its usage in certain electronic packaging applications. Herein, the carbon fiber is coated with insulating alumina (Al<sub>2</sub>O<sub>3</sub>) ceramic to improve the insulation properties of the thermal interface materials. The Al<sub>2</sub>O<sub>3</sub> coating is formed directly onto the surface of carbon fiber using the sol-gel method and subsequent heat treatment, which substantially improves the insulation of the carbon fiber with an increased powder resistivity of nearly 42 times. Subsequently, the thermally conductive carbon fiber fillers are neatly aligned in the silicone rubber matrix along the vertical direction of heat transfer, which results in excellent properties of the prepared thermally conductive pads. The carbon fiber-filled pads exhibit a high thermal conductivity of 14.17 W m<sup>−1</sup> K<sup>−1</sup>, a high resistivity of 1.12 × 10<sup>10</sup> Ω cm, a medium breakdown voltage of 2.4 kV mm<sup>−1</sup>, and a favorable compression ratio (@45 psi) of 54.7 %. This work offers a feasible approach for the development of carbon fiber fillers with integrated thermal conductivity and electrical insulation, leading to the expanded application of carbon fiber in electronic packaging.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111128"},"PeriodicalIF":8.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A triple action mechanism synergistic interface based on tannic acid/poly (ethylene glycol)/Fe3+ formation for improving the properties of short bamboo fiber/PBSA biocomposites

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

Composites Science and Technology

Pub Date : 2025-02-25 DOI: 10.1016/j.compscitech.2025.111124

Jian Gao , Yanbin Bi , Yi Zhang , Jixing Su , Yida Wang , Shuangbao Zhang

Bamboo fibers (BFs) reinforced polymer composites face significant challenges in enhancing composite properties due to poor interfacial compatibility. This study is based on the coordination and molecular cross-linking reactions between tannic acid (TA), Fe³⁺, and polyethylene glycol (PEG). A triple-action mechanism interface integrating rigid-flexible balanced, molecular cross-linking and mechanical interlocking was obtained in BFs/PBSA composites by a simple one-pot water reaction and hot pressing process. The interface significantly improved the performance of the composites. Specifically, the tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength of the composites were increased by 20 %, 13 %, 38 %, 14 %, and 54 %, respectively, while the maximum energy storage modulus was enhanced by 71 %. Additionally, the initial and maximum degradation temperatures increased by 17.1 °C and 19.2 °C, respectively, and water absorption decreased by 34 %. These results demonstrate the promising potential of the interface for preparing high-performance plant fiber-reinforced polymer composites.

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引用次数: 0

Investigation on the in situ interfacial Mode II fracture toughness of the 3D woven composites

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

Composites Science and Technology

Pub Date : 2025-02-24 DOI: 10.1016/j.compscitech.2025.111125

Qingsong Zong , Jinzhao Huang , Junfeng Ding , Licheng Guo

The interfacial mode II fracture toughness G_IIC is an important parameter that significantly affects the damage evolution of the composite materials under shear load. Traditional interlaminar fracture toughness test methods are no longer suitable for the measurement of interfacial fracture toughness within the 3D woven composites (3DWCs) because these methods cause yarn breakage, which could overestimate the fracture toughness by more than ten times. To this end, this paper proposes a new method to obtain the in situ interfacial G_IIC of the 3DWCs. The stable propagation of the mode II crack along the interface was achieved by the unique specimen design. A highly restored finite element (FE) model of the specimen was established, and the virtual crack closure technique (VCCT) was adopted to calculate the interfacial G_IIC. The rationality of the experiments and the validation of the simulation have been carefully demonstrated. The values of G_IIC obtained from three different off-axis angles are consistent, which proves the effectiveness of the proposed method.

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引用次数: 0

Comparative analysis of NOL-ring tensile strength in towpreg and slit-tape for filament winding: Influence of resin viscosity, tack, and consolidation

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

Composites Science and Technology

Pub Date : 2025-02-22 DOI: 10.1016/j.compscitech.2025.111123

Eduardo Szpoganicz , Fabian Hübner , Marius Luik , Jeremias Thomas , Florian Max , Andreas Scherer , Tobias Dickhut , Holger Ruckdäschel

This study investigates the tensile strength of carbon-fiber reinforced polymer (CFRP) specimens manufactured via filament winding with varying winding parameters. NOL-rings (Naval Ordnance Laboratories) were processed using unidirectional CFRP material, and the performance of towpregs was compared to slit-tapes of different widths and temperature settings. To establish a benchmark, autoclave-cured prepregs were laminated into flat rectangular samples. The manufacturing process revealed significant variations in laminate strength and ply consolidation, analyzed through optical micrographs and profile analysis. Tensile strengths of the NOL-rings ranged from 1430 MPa to 1800 MPa, with towpregs performing better due to higher tackiness and improved consolidation, compared to slit-tapes with no applied temperature. However, both were still bellow the 2100 MPa strength of autoclave-cured reference samples. Finite element analysis showed that the NOL-ring geometry induces bending stresses, even in an idealized part, reducing the theoretical tensile strength to 1900 MPa. Additionally, in-situ cryogenic testing using liquid nitrogen was reported for the first time for NOL-ring specimens, revealed a significant increase in strength to 2200 MPa, attributed to the stiffening effect at low temperatures. This work introduces a novel approach by correlating ply consolidation with slit-tapes, towpregs, and winding parameters, linking prepreg tackiness to tensile performance, and presenting additionally testing of NOL-rings at 77 K, thus providing understanding of their behavior in cryogenic environments.

{"title":"Comparative analysis of NOL-ring tensile strength in towpreg and slit-tape for filament winding: Influence of resin viscosity, tack, and consolidation","authors":"Eduardo Szpoganicz , Fabian Hübner , Marius Luik , Jeremias Thomas , Florian Max , Andreas Scherer , Tobias Dickhut , Holger Ruckdäschel","doi":"10.1016/j.compscitech.2025.111123","DOIUrl":"10.1016/j.compscitech.2025.111123","url":null,"abstract":"<div><div>This study investigates the tensile strength of carbon-fiber reinforced polymer (CFRP) specimens manufactured via filament winding with varying winding parameters. NOL-rings (Naval Ordnance Laboratories) were processed using unidirectional CFRP material, and the performance of towpregs was compared to slit-tapes of different widths and temperature settings. To establish a benchmark, autoclave-cured prepregs were laminated into flat rectangular samples. The manufacturing process revealed significant variations in laminate strength and ply consolidation, analyzed through optical micrographs and profile analysis. Tensile strengths of the NOL-rings ranged from 1430 MPa to 1800 MPa, with towpregs performing better due to higher tackiness and improved consolidation, compared to slit-tapes with no applied temperature. However, both were still bellow the 2100 MPa strength of autoclave-cured reference samples. Finite element analysis showed that the NOL-ring geometry induces bending stresses, even in an idealized part, reducing the theoretical tensile strength to 1900 MPa. Additionally, in-situ cryogenic testing using liquid nitrogen was reported for the first time for NOL-ring specimens, revealed a significant increase in strength to 2200 MPa, attributed to the stiffening effect at low temperatures. This work introduces a novel approach by correlating ply consolidation with slit-tapes, towpregs, and winding parameters, linking prepreg tackiness to tensile performance, and presenting additionally testing of NOL-rings at 77 K, thus providing understanding of their behavior in cryogenic environments.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111123"},"PeriodicalIF":8.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508826","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

Macro/micro synergistic thermal conductivity enhancement in liquid metal-based phase change composites for thermal management in electronic devices

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

Composites Science and Technology

Pub Date : 2025-02-21 DOI: 10.1016/j.compscitech.2025.111120

Guangyin Liu, Kaixun Shang, Shiqi Chen, Jun Shen

Liquid metals (LM) demonstrate significant potential in thermal management applications for electronic devices due to their high thermal conductivity and phase change heat absorption capabilities. However, when combined with organic flexible substrates to create composite materials, the advantages of high thermal conductivity can be substantially diminished. To address this challenge, this study proposes a macro/micro synergistic thermal conductivity enhancement method. By coating LM particles with carbon nanotubes (CNT), the LM@CNT particles that mimics a "neuron" structure was developed. LM@CNT was combined with silicone rubber (SR) to form the LM@CNT/SR, which exhibits micro-level thermal conductivity enhancement. The integration of LM@CNT in SR establishes a thermal conduction network, resulting in a thermal conductivity of 1.37 W/m/K for the LM@CNT/SR. Inspired by the growth rings in tree trunks, vertically aligned graphene films (VAGF) are ingeniously embedded in the composite material to enhance thermal conductivity at the macro-level. The results show that embedding 0.02 mm thick VAGF can increase thermal conductivity by 8.8 W/m/K, while 0.1 mm thick VAGF can achieve an increase of 24.7 W/m/K. The thermal conductivity of LM@CNT/SR/VAGF has obvious anisotropy. Furthermore, the LM@CNT/SR/VAGF demonstrates excellent stability, with negligible changes in thermal conductivity after nearly 2000 temperature cycles. The methodology proposed in this study for producing high thermal conductivity phase change composite materials employs simple and cost-effective processes, offering a novel framework for the mass production of such composites. This approach shows substantial potential for applications in thermal surge protection and thermal management within electronic devices.

{"title":"Macro/micro synergistic thermal conductivity enhancement in liquid metal-based phase change composites for thermal management in electronic devices","authors":"Guangyin Liu, Kaixun Shang, Shiqi Chen, Jun Shen","doi":"10.1016/j.compscitech.2025.111120","DOIUrl":"10.1016/j.compscitech.2025.111120","url":null,"abstract":"<div><div>Liquid metals (LM) demonstrate significant potential in thermal management applications for electronic devices due to their high thermal conductivity and phase change heat absorption capabilities. However, when combined with organic flexible substrates to create composite materials, the advantages of high thermal conductivity can be substantially diminished. To address this challenge, this study proposes a macro/micro synergistic thermal conductivity enhancement method. By coating LM particles with carbon nanotubes (CNT), the LM@CNT particles that mimics a \"neuron\" structure was developed. LM@CNT was combined with silicone rubber (SR) to form the LM@CNT/SR, which exhibits micro-level thermal conductivity enhancement. The integration of LM@CNT in SR establishes a thermal conduction network, resulting in a thermal conductivity of 1.37 W/m/K for the LM@CNT/SR. Inspired by the growth rings in tree trunks, vertically aligned graphene films (VAGF) are ingeniously embedded in the composite material to enhance thermal conductivity at the macro-level. The results show that embedding 0.02 mm thick VAGF can increase thermal conductivity by 8.8 W/m/K, while 0.1 mm thick VAGF can achieve an increase of 24.7 W/m/K. The thermal conductivity of LM@CNT/SR/VAGF has obvious anisotropy. Furthermore, the LM@CNT/SR/VAGF demonstrates excellent stability, with negligible changes in thermal conductivity after nearly 2000 temperature cycles. The methodology proposed in this study for producing high thermal conductivity phase change composite materials employs simple and cost-effective processes, offering a novel framework for the mass production of such composites. This approach shows substantial potential for applications in thermal surge protection and thermal management within electronic devices.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111120"},"PeriodicalIF":8.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479656","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

Dynamic polydisulfide-assisted in-situ reduction and encapsulation of nanosilver for fabricating robust photothermal antimicrobial composite textiles

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

Composites Science and Technology

Pub Date : 2025-02-21 DOI: 10.1016/j.compscitech.2025.111122

Leilei Wu, Yun Yuan, Xinyi Huang, Xiaoyan Liu, Bo Xu, Li Cui, Qiang Wang, Ping Wang

The development of textiles with efficient and long-lasting antimicrobial properties is critical for mitigating medical cross-infections and addressing the growing demands of public health. Herein, an effective approach was demonstrated to fabricate biocompatible composite textiles with robust antimicrobial properties, through dynamic polydisulfide assisted in-situ reduction and encapsulation of nanosilver. Specifically, a reductive platform was established on cotton surfaces by sequentially grafting γ-aminopropyl triethoxysilane and α-lipoic acid (ALA). Subsequently, the amino groups and the dynamically-generated sulfhydryl groups within ALA units were utilized to initiate the reduction of silver ions without the need for additional reductants, thereby forming a stable antibacterial matrix layer on the fiber surface. The resulting fabric exhibits durable antimicrobial properties, achieving a 99.99 % antibacterial and antifungal efficacy even after 50 cycles of standard laundering. Notably, the deposition of silver nanoparticles endows the cotton fabric with significant photothermal conversion ability, and facilitates the generation of multiple bactericidal free radicals. These properties enable the effective eradication of bacteria and fungi on the textile surface within 10 min of irradiation with an intensity of 100 mW/cm². Furthermore, the photothermal antimicrobial fabric retains satisfactory inherent wearability and biocompatibility. The present work provides an alternative for developing robust and durable antimicrobial textiles.

{"title":"Dynamic polydisulfide-assisted in-situ reduction and encapsulation of nanosilver for fabricating robust photothermal antimicrobial composite textiles","authors":"Leilei Wu, Yun Yuan, Xinyi Huang, Xiaoyan Liu, Bo Xu, Li Cui, Qiang Wang, Ping Wang","doi":"10.1016/j.compscitech.2025.111122","DOIUrl":"10.1016/j.compscitech.2025.111122","url":null,"abstract":"<div><div>The development of textiles with efficient and long-lasting antimicrobial properties is critical for mitigating medical cross-infections and addressing the growing demands of public health. Herein, an effective approach was demonstrated to fabricate biocompatible composite textiles with robust antimicrobial properties, through dynamic polydisulfide assisted <em>in-situ</em> reduction and encapsulation of nanosilver. Specifically, a reductive platform was established on cotton surfaces by sequentially grafting γ-aminopropyl triethoxysilane and α-lipoic acid (ALA). Subsequently, the amino groups and the dynamically-generated sulfhydryl groups within ALA units were utilized to initiate the reduction of silver ions without the need for additional reductants, thereby forming a stable antibacterial matrix layer on the fiber surface. The resulting fabric exhibits durable antimicrobial properties, achieving a 99.99 % antibacterial and antifungal efficacy even after 50 cycles of standard laundering. Notably, the deposition of silver nanoparticles endows the cotton fabric with significant photothermal conversion ability, and facilitates the generation of multiple bactericidal free radicals. These properties enable the effective eradication of bacteria and fungi on the textile surface within 10 min of irradiation with an intensity of 100 mW/cm<sup>2</sup>. Furthermore, the photothermal antimicrobial fabric retains satisfactory inherent wearability and biocompatibility. The present work provides an alternative for developing robust and durable antimicrobial textiles.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111122"},"PeriodicalIF":8.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479655","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

Stabilizing free radical crosslinked dielectric polymers with metal-organic frameworks: An efficient approach to mitigating dielectric deterioration

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

Composites Science and Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.compscitech.2025.111109

Zeru Wang , Xie Wang , Hanxue Ren , Xiaotao Zhu , Zeming Fang , Qianfa Liu , Ke Wang

The rise of 5G and 6G technologies has heightened the demand for ultra-low dielectric loss thermosetting composites in advanced electronics. A significant challenge is dielectric degradation at elevated temperatures, primarily due to increased molecular polarizability from thermal aging. Traditional stabilization strategies are ineffective because of their incompatibility with free radical cross-linking reactions and their negative impact on dielectric performance. This study incorporates UiO-66, a metal-organic framework, into thermosetting polyphenylene oxide/1,2-polybutadiene systems, yielding composites with enhanced oxidation resistance and dielectric stability without impeding cross-linking. After 14 days of aging at 150 °C, the UiO-66-modified composite exhibited exceptional dielectric stability, with its dielectric loss increasing to only one-sixth compared to the unmodified system. Fourier-transform infrared and X-ray photoelectron spectroscopy analyses indicate that UiO-66 mitigates the oxidation of unreacted double bonds and delays the formation of C–O and CO groups. These improvements are attributed to UiO-66's exceptional oxygen/ozone adsorption capabilities, along with its free radical quenching abilities, facilitated by its high surface area, porous structure, and abundant open metal sites, confirmed by electron paramagnetic resonance and density functional theory analyses. Furthermore, UiO-66 reduces thermal expansion and increases modulus. This study opens a new avenue for designing and developing high-performance electronic materials with customizable structures and properties.

{"title":"Stabilizing free radical crosslinked dielectric polymers with metal-organic frameworks: An efficient approach to mitigating dielectric deterioration","authors":"Zeru Wang , Xie Wang , Hanxue Ren , Xiaotao Zhu , Zeming Fang , Qianfa Liu , Ke Wang","doi":"10.1016/j.compscitech.2025.111109","DOIUrl":"10.1016/j.compscitech.2025.111109","url":null,"abstract":"<div><div>The rise of 5G and 6G technologies has heightened the demand for ultra-low dielectric loss thermosetting composites in advanced electronics. A significant challenge is dielectric degradation at elevated temperatures, primarily due to increased molecular polarizability from thermal aging. Traditional stabilization strategies are ineffective because of their incompatibility with free radical cross-linking reactions and their negative impact on dielectric performance. This study incorporates UiO-66, a metal-organic framework, into thermosetting polyphenylene oxide/1,2-polybutadiene systems, yielding composites with enhanced oxidation resistance and dielectric stability without impeding cross-linking. After 14 days of aging at 150 °C, the UiO-66-modified composite exhibited exceptional dielectric stability, with its dielectric loss increasing to only one-sixth compared to the unmodified system. Fourier-transform infrared and X-ray photoelectron spectroscopy analyses indicate that UiO-66 mitigates the oxidation of unreacted double bonds and delays the formation of C–O and C<img>O groups. These improvements are attributed to UiO-66's exceptional oxygen/ozone adsorption capabilities, along with its free radical quenching abilities, facilitated by its high surface area, porous structure, and abundant open metal sites, confirmed by electron paramagnetic resonance and density functional theory analyses. Furthermore, UiO-66 reduces thermal expansion and increases modulus. This study opens a new avenue for designing and developing high-performance electronic materials with customizable structures and properties.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111109"},"PeriodicalIF":8.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453267","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

Broadband strong absorption in lightweight metastructure via multiscale modulation

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

Composites Science and Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.compscitech.2025.111110

Kai Cui, Lei Zheng, Lili Wu, Tao Wang, Xian Wang, Rongzhou Gong

Designing and fabricating an advanced metastructure absorber (MA) with lightweight, broadband, and high absorption efficiency is a promising solution to the growing electromagnetic (EM) pollution issue. Herein, the nano-graphite (NG)/polyamide 12 (PA12) composite filaments were fabricated using hot-melting processing, with the dispersion of NG particles in PA12 controlled by varying machining times. Analytical results revealed that improved dispersion of NG particles in the PA12 matrix significantly enhances the EM loss capability of the composite filaments, primarily due to increased conductive paths and interfacial contact area. Subsequently, a multilayer honeycomb structure with a bi-gradient material-structure was developed to improve the impedance matching of carbon-based composites. Simulations revealed that the proposed MA achieved a reflection loss (RL) below −10 dB in the 2–18 GHz with a relative bandwidth of up to 160 %, and exhibited a strong RL below −20 dB in the 4.2–18 GHz range. Finally, the MA was fabricated using 3D printing technology and demonstrated excellent agreement between the experimental RL and simulation results. Importantly, this research offers new insights into the modulation of EM property in carbon-based composite filaments and the design of MA with integrated broadband and high efficiency.

{"title":"Broadband strong absorption in lightweight metastructure via multiscale modulation","authors":"Kai Cui, Lei Zheng, Lili Wu, Tao Wang, Xian Wang, Rongzhou Gong","doi":"10.1016/j.compscitech.2025.111110","DOIUrl":"10.1016/j.compscitech.2025.111110","url":null,"abstract":"<div><div>Designing and fabricating an advanced metastructure absorber (MA) with lightweight, broadband, and high absorption efficiency is a promising solution to the growing electromagnetic (EM) pollution issue. Herein, the nano-graphite (NG)/polyamide 12 (PA12) composite filaments were fabricated using hot-melting processing, with the dispersion of NG particles in PA12 controlled by varying machining times. Analytical results revealed that improved dispersion of NG particles in the PA12 matrix significantly enhances the EM loss capability of the composite filaments, primarily due to increased conductive paths and interfacial contact area. Subsequently, a multilayer honeycomb structure with a bi-gradient material-structure was developed to improve the impedance matching of carbon-based composites. Simulations revealed that the proposed MA achieved a reflection loss (RL) below −10 dB in the 2–18 GHz with a relative bandwidth of up to 160 %, and exhibited a strong RL below −20 dB in the 4.2–18 GHz range. Finally, the MA was fabricated using 3D printing technology and demonstrated excellent agreement between the experimental RL and simulation results. Importantly, this research offers new insights into the modulation of EM property in carbon-based composite filaments and the design of MA with integrated broadband and high efficiency.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"264 ","pages":"Article 111110"},"PeriodicalIF":8.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464670","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