This study introduces a novel approach by designing a flexible three-dimensional Covalent Organic Framework (COFs), specifically NH2-POSS-COF, which serves as a uniform cross-linking site within the EP system. This framework provides substantial internal free volume and mitigates stress concentrations by enabling effective energy dissipation during mechanical loading. The research demonstrates that the integration of NH2-POSS-COF significantly enhances the fracture toughness and tensile strength of EP at both RT and cryogenic. These findings open new avenues for optimizing EP performance in low-temperature applications, contributing to the development of high-performance composite materials for aerospace missions.
{"title":"New flexible 3D POSS-based COF simultaneously strengthens and toughens epoxy resin (EP) at extreme temperatures","authors":"Runze Jin , Yijie Zhang , Donghui Guo , Zhiliang Zhou , Lijie Qu , Baosheng Xu","doi":"10.1016/j.compositesa.2025.108846","DOIUrl":"10.1016/j.compositesa.2025.108846","url":null,"abstract":"<div><div>This study introduces a novel approach by designing a flexible three-dimensional Covalent Organic Framework (COFs), specifically NH<sub>2</sub>-POSS-COF, which serves as a uniform cross-linking site within the EP system. This framework provides substantial internal free volume and mitigates stress concentrations by enabling effective energy dissipation during mechanical loading. The research demonstrates that the integration of NH<sub>2</sub>-POSS-COF significantly enhances the fracture toughness and tensile strength of EP at both RT and cryogenic. These findings open new avenues for optimizing EP performance in low-temperature applications, contributing to the development of high-performance composite materials for aerospace missions.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108846"},"PeriodicalIF":8.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578127","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}
The development of thermal management approaches for composites manufacturing based on physics-based process simulation has become well-established in recent years. However, estimation of thermal boundary conditions, typically in the form of heat-transfer coefficients (HTCs) at the air-part and air-tool interfaces, during convective heat transfer-based curing processes (such as autoclaves and ovens) remains a challenge and a major source of uncertainty. Current deterministic process simulation methods are not suitable for capturing the effect of these HTC uncertainties and their consequential effects on the corresponding thermal histories of curing parts. This work develops and demonstrates the applicability of statistical inference-based models to estimate HTC distributions and the associated uncertainties using synthetic datasets generated from finite element simulations. An experimental case study with real data from the cooling of a heated tool is then presented on using the validated model for inferring, as well as quantifying the uncertainties in HTCs.
{"title":"A Bayesian framework for quantifying uncertainty in the thermal history of curing composite structures","authors":"Arghyanil Bhattacharjee , Kamyar Gordnian , Reza Vaziri , Trevor Campbell , Anoush Poursartip","doi":"10.1016/j.compositesa.2025.108843","DOIUrl":"10.1016/j.compositesa.2025.108843","url":null,"abstract":"<div><div>The development of thermal management approaches for composites manufacturing based on physics-based process simulation has become well-established in recent years. However, estimation of thermal boundary conditions, typically in the form of heat-transfer coefficients (HTCs) at the air-part and air-tool interfaces, during convective heat transfer-based curing processes (such as autoclaves and ovens) remains a challenge and a major source of uncertainty. Current deterministic process simulation methods are not suitable for capturing the effect of these HTC uncertainties and their consequential effects on the corresponding thermal histories of curing parts. This work develops and demonstrates the applicability of statistical inference-based models to estimate HTC distributions and the associated uncertainties using synthetic datasets generated from finite element simulations. An experimental case study with real data from the cooling of a heated tool is then presented on using the validated model for inferring, as well as quantifying the uncertainties in HTCs.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108843"},"PeriodicalIF":8.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-04DOI: 10.1016/j.compositesa.2025.108849
Yanyun Li , Tiancheng Wang , Junying Zhang , Jue Cheng , Qingsong Lian
In recent years, thermal management technology based on phase change materials (PCMs) has provided a new solution for the development of wearable thermal management systems. However, because the high enthalpy value, flexibility, and multi-functional integration of PCMs are mutually restricted, most of the reported wearable thermal management materials cannot achieve the synergic development of flexibility at room temperature, multi-functionality, and heat storage capacity of PCMs. In this paper, a new type of flexible PCMs was prepared by using bio-based modified eugenol epoxy resin and lauric acid. It is worth noting that due to the flexibility of the epoxy network itself and its excellent compatibility with La, the final PCMs exhibit high encapsulation rate (80 wt%) and high enthalpy value (163.3 J/g). Finally, the PCMs were combined with graphene paper to prepare a composite film, which has excellent thermal conductivity (3.28 Wm−1 K−1), electromagnetic interference shielding property (42 dB), solar-thermal (86.7 %, 1000 W/m2), and electro-thermal (89.3 %, 3.0 V) conversion and storage capabilities. Besides, the composite film not only has good flexibility at room temperature, but also shows excellent multi-mode shape memory performances. Last but not least, the composite film has great application potential in the field of wearable thermal therapy equipment.
{"title":"Multi-mode triggered bio-based epoxy resin/lauric acid/graphene paper flexible phase change materials with high enthalpy value, multi-functionality, and personal thermal management ability","authors":"Yanyun Li , Tiancheng Wang , Junying Zhang , Jue Cheng , Qingsong Lian","doi":"10.1016/j.compositesa.2025.108849","DOIUrl":"10.1016/j.compositesa.2025.108849","url":null,"abstract":"<div><div>In recent years, thermal management technology based on phase change materials (PCMs) has provided a new solution for the development of wearable thermal management systems. However, because the high enthalpy value, flexibility, and multi-functional integration of PCMs are mutually restricted, most of the reported wearable thermal management materials cannot achieve the synergic development of flexibility at room temperature, multi-functionality, and heat storage capacity of PCMs. In this paper, a new type of flexible PCMs was prepared by using bio-based modified eugenol epoxy resin and lauric acid. It is worth noting that due to the flexibility of the epoxy network itself and its excellent compatibility with La, the final PCMs exhibit high encapsulation rate (80 wt%) and high enthalpy value (163.3 J/g). Finally, the PCMs were combined with graphene paper to prepare a composite film, which has excellent thermal conductivity (3.28 Wm<sup>−1</sup> K<sup>−1</sup>), electromagnetic interference shielding property (42 dB), solar-thermal (86.7 %, 1000 W/m<sup>2</sup>), and electro-thermal (89.3 %, 3.0 V) conversion and storage capabilities. Besides, the composite film not only has good flexibility at room temperature, but also shows excellent multi-mode shape memory performances. Last but not least, the composite film has great application potential in the field of wearable thermal therapy equipment.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108849"},"PeriodicalIF":8.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628649","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}
Pub Date : 2025-03-04DOI: 10.1016/j.compositesa.2025.108848
Xinglin Gao, Jun Li, Zhang Liu, Qianying Guo, Yuan Huang, Zumin Wang
Copper matrix composites, known for their high strength, derive their desirable mechanical properties from strengthening effects of reinforcement. However, a single reinforcement provides a limitation of improvement in strength at the expense of plasticity. A strategy of synergistic improvement of strength and plasticity has been developed by incorporating two reinforcements with different aspect ratios. To this end, WC nanoparticles and SiC whiskers-reinforced copper matrix composites (WCp-SiCw/Cu) were prepared by intermittent pulsed electrodeposition and spark plasma sintering. These composites are designed with a unique core-shell structure, and thereby the agglomeration of reinforcements can be effectively avoided during sintering. As a result, the yield strength (323 MPa) of the WCp-SiCw/Cu is about double that of pure copper, while maintaining a high uniform elongation (15.3 %). The synergistic strengthening of the composites arises from the complementary advantages of the SiCw(s) and WCp(s). The results provide a promising route to preparing composites with comprehensive mechanical properties.
{"title":"Synergistic strengthening of copper matrix composites with carbides of different aspect ratios","authors":"Xinglin Gao, Jun Li, Zhang Liu, Qianying Guo, Yuan Huang, Zumin Wang","doi":"10.1016/j.compositesa.2025.108848","DOIUrl":"10.1016/j.compositesa.2025.108848","url":null,"abstract":"<div><div>Copper matrix composites, known for their high strength, derive their desirable mechanical properties from strengthening effects of reinforcement. However, a single reinforcement provides a limitation of improvement in strength at the expense of plasticity. A strategy of synergistic improvement of strength and plasticity has been developed by incorporating two reinforcements with different aspect ratios. To this end, WC nanoparticles and SiC whiskers-reinforced copper matrix composites (WC<sub>p</sub>-SiC<sub>w</sub>/Cu) were prepared by intermittent pulsed electrodeposition and spark plasma sintering. These composites are designed with a unique core-shell structure, and thereby the agglomeration of reinforcements can be effectively avoided during sintering. As a result, the yield strength (323 MPa) of the WC<sub>p</sub>-SiC<sub>w</sub>/Cu is about double that of pure copper, while maintaining a high uniform elongation (15.3 %). The synergistic strengthening of the composites arises from the complementary advantages of the SiC<sub>w</sub>(s) and WC<sub>p</sub>(s). The results provide a promising route to preparing composites with comprehensive mechanical properties.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108848"},"PeriodicalIF":8.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578130","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}
Pub Date : 2025-03-03DOI: 10.1016/j.compositesa.2025.108845
Samuel Kim , Hyunsoo Hong , Jaemoon Jeong, Wonvin Kim, Wonki Kim, Gyumin Sim, Jieun Lee, Seong Su Kim
In this study, a truss-based metastructure is proposed that simultaneously considers structural and vibration attenuation performance. To enhance vibration characteristics, the unit cell is designed to induce local resonance and the inertial amplification effect. Finite element analysis (FEA) was conducted to evaluate the compression stiffness and transmissibility of the unit cell with respect to its shape, and the switchable vibration characteristics depending on the presence of water were analyzed through dispersion relation. In addition, an optimal vibration attenuation metastructure satisfying the target stiffness was derived using a genetic algorithm. To validate the FEA results of the optimal structure, the metastructure was fabricated using stereolithography 3D printing, followed by structural and vibration tests. The fabricated truss-based metastructure showed good agreement with the vibration analysis results and excellent vibration reduction characteristics.
{"title":"Optimization of 3D printed truss meta-structure for structural performance and switchable vibration attenuation","authors":"Samuel Kim , Hyunsoo Hong , Jaemoon Jeong, Wonvin Kim, Wonki Kim, Gyumin Sim, Jieun Lee, Seong Su Kim","doi":"10.1016/j.compositesa.2025.108845","DOIUrl":"10.1016/j.compositesa.2025.108845","url":null,"abstract":"<div><div>In this study, a truss-based metastructure is proposed that simultaneously considers structural and vibration attenuation performance. To enhance vibration characteristics, the unit cell is designed to induce local resonance and the inertial amplification effect. Finite element analysis (FEA) was conducted to evaluate the compression stiffness and transmissibility of the unit cell with respect to its shape, and the switchable vibration characteristics depending on the presence of water were analyzed through dispersion relation. In addition, an optimal vibration attenuation metastructure satisfying the target stiffness was derived using a genetic algorithm. To validate the FEA results of the optimal structure, the metastructure was fabricated using stereolithography 3D printing, followed by structural and vibration tests. The fabricated truss-based metastructure showed good agreement with the vibration analysis results and excellent vibration reduction characteristics.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108845"},"PeriodicalIF":8.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563291","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}
Pub Date : 2025-03-02DOI: 10.1016/j.compositesa.2025.108821
Imre Romsics , Róbert Várdai , Emese Pregi , Gábor Faludi , Nóra Hegyesi , János Móczó , Béla Pukánszky
A multilayered packaging film consisting of three polyamides (PA), a polyethylene (PE) and a maleated polyethylene (MAPE) component acting as adhesive layer was reprocessed into glass fiber reinforced composites by chopping the waste, compounding and injection molding. The polyamides are miscible or at least develop strong interactions with each other, and PE and MAPE also form a homogeneous phase. The mediocre properties of the blend could be upgraded by the addition of glass fibers. The fiber covered with a sizing optimized for commodity polymers is embedded in polyethylene, thus it develops weak interactions with the PA matrix. The fiber having a sizing optimized for PA adheres strongly to the PA matrix resulting in efficient stress transfer and large strength. The property profile of the reprocessed material is in the range of commercial fiber reinforced PA composites and its price is very competitive.
{"title":"Fiber reinforced structural material from the waste of a multilayer food packaging film: Interactions, structure, properties","authors":"Imre Romsics , Róbert Várdai , Emese Pregi , Gábor Faludi , Nóra Hegyesi , János Móczó , Béla Pukánszky","doi":"10.1016/j.compositesa.2025.108821","DOIUrl":"10.1016/j.compositesa.2025.108821","url":null,"abstract":"<div><div>A multilayered packaging film consisting of three polyamides (PA), a polyethylene (PE) and a maleated polyethylene (MAPE) component acting as adhesive layer was reprocessed into glass fiber reinforced composites by chopping the waste, compounding and injection molding. The polyamides are miscible or at least develop strong interactions with each other, and PE and MAPE also form a homogeneous phase. The mediocre properties of the blend could be upgraded by the addition of glass fibers. The fiber covered with a sizing optimized for commodity polymers is embedded in polyethylene, thus it develops weak interactions with the PA matrix. The fiber having a sizing optimized for PA adheres strongly to the PA matrix resulting in efficient stress transfer and large strength. The property profile of the reprocessed material is in the range of commercial fiber reinforced PA composites and its price is very competitive.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108821"},"PeriodicalIF":8.1,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-28DOI: 10.1016/j.compositesa.2025.108831
Milad Abolfazli , Milad Bazli , Sashidhar Regmi , Milad Shakiba , Caleb O. Ojo , Ali Rajabipour , Reza Hassanli , Ramin Shahbazi , Mehrdad Arashpour
Enhancing the fire resistance of fibre‐reinforced polymer (FRP) composites is vital for ensuring structural safety in fire‐prone infrastructures. This study investigates the thermal degradation and residual compressive strength of filament-wound hybrid fibre-reinforced polymer (HFRP) tubes exposed to temperatures ranging from 25 °C to 350 °C. The tubes, composed of 50 % carbon fibre and 50 % E-glass fibre, with a 60:40 fibre–resin ratio, were subjected to thermal conditioning to simulate real-world fire exposure. For uncoated tubes, a balance between resin post-curing and pyrolytic degradation preserves compressive strength up to 200 °C, but strength sharply decreases beyond this threshold due to intensified pyrolysis, with virtually no residual strength at 350 °C. Fire-retardant coatings, Nullifire SC902, activate above 200 °C, providing limited protection, and the samples retain 20–21 % of their original compressive strength at 350 °C. As revealed by complementary Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), and Fourier Transform Infrared Spectroscopy (FTIR) analyses, key degradation mechanisms include matrix degradation and cracking and fibre exposure. Overall, the fire-retardant coating offers some benefits at higher temperatures, but its effectiveness is limited by activation thresholds and prolonged exposure. The findings show the need for further optimisation of fire-resistant systems for HFRP composites to improve their safety and durability in fire-prone applications.
{"title":"Impact of Fire-Retardant coating on the residual compressive strength of hybrid Fibre-Reinforced polymer tubes exposed to elevated temperature","authors":"Milad Abolfazli , Milad Bazli , Sashidhar Regmi , Milad Shakiba , Caleb O. Ojo , Ali Rajabipour , Reza Hassanli , Ramin Shahbazi , Mehrdad Arashpour","doi":"10.1016/j.compositesa.2025.108831","DOIUrl":"10.1016/j.compositesa.2025.108831","url":null,"abstract":"<div><div>Enhancing the fire resistance of fibre‐reinforced polymer (FRP) composites is vital for ensuring structural safety in fire‐prone infrastructures. This study investigates the thermal degradation and residual compressive strength of filament-wound hybrid fibre-reinforced polymer (HFRP) tubes exposed to temperatures ranging from 25 °C to 350 °C. The tubes, composed of 50 % carbon fibre and 50 % E-glass fibre, with a 60:40 fibre–resin ratio, were subjected to thermal conditioning to simulate real-world fire exposure. For uncoated tubes, a balance between resin post-curing and pyrolytic degradation preserves compressive strength up to 200 °C, but strength sharply decreases beyond this threshold due to intensified pyrolysis, with virtually no residual strength at 350 °C. Fire-retardant coatings, Nullifire SC902, activate above 200 °C, providing limited protection, and the samples retain 20–21 % of their original compressive strength at 350 °C. As revealed by complementary Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), and Fourier Transform Infrared Spectroscopy (FTIR) analyses, key degradation mechanisms include matrix degradation and cracking and fibre exposure. Overall, the fire-retardant coating offers some benefits at higher temperatures, but its effectiveness is limited by activation thresholds and prolonged exposure. The findings show the need for further optimisation of fire-resistant systems for HFRP composites to improve their safety and durability in fire-prone applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108831"},"PeriodicalIF":8.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-28DOI: 10.1016/j.compositesa.2025.108830
Junjie Xu , Xiaolong Hao , Shangkun Huang , Chuanfu Chen , Qi Fan , Lichao Sun , Rongxian Ou , Qingwen Wang
Enhancing the mechanical properties and dimensional stability of ultra-highly filled wood-plastic composites (UH-WPCs) presents significant challenges. This study developed UH-WPCs with 70–90 wt% loading using six binary alloy matrices with multimodal and unimodal distributions. FTIR spectroscopy and thermogravimetric analysis revealed an average MAPE esterification rate of 11.9% at 80 wt% loading. Density, morphology, and dynamic mechanical analysis revealed that multimodal high molecular weight alloys significantly improved uniformity and interfacial adhesion compared to unimodal alloys. This increased tensile, flexural, and impact strengths by 30.1%, 22.7%, and 61.8%, respectively, while reducing thermal expansion, creep, and water absorption by 14.0%, 17.1%, and 13.1%. The low molecular weight fraction of multimodal HDPE facilitated miscibility with MAPE, promoted esterification, and minimized fiber damage, while the high molecular weight fraction enhanced composite integrity and cohesiveness. Notably, chain entanglement within the alloy was more critical than esterification rate in improving the mechanical and dimensional stability of UH-WPCs.
{"title":"Synergistic Improvement of Mechanical, Creep, and Dimensional Stability in Ultra-Highly Filled Wood Fiber/Polyethylene Composites Using Multimodal Alloy Matrices","authors":"Junjie Xu , Xiaolong Hao , Shangkun Huang , Chuanfu Chen , Qi Fan , Lichao Sun , Rongxian Ou , Qingwen Wang","doi":"10.1016/j.compositesa.2025.108830","DOIUrl":"10.1016/j.compositesa.2025.108830","url":null,"abstract":"<div><div>Enhancing the mechanical properties and dimensional stability of ultra-highly filled wood-plastic composites (UH-WPCs) presents significant challenges. This study developed UH-WPCs with 70–90 wt% loading using six binary alloy matrices with multimodal and unimodal distributions. FTIR spectroscopy and thermogravimetric analysis revealed an average MAPE esterification rate of 11.9% at 80 wt% loading. Density, morphology, and dynamic mechanical analysis revealed that multimodal high molecular weight alloys significantly improved uniformity and interfacial adhesion compared to unimodal alloys. This increased tensile, flexural, and impact strengths by 30.1%, 22.7%, and 61.8%, respectively, while reducing thermal expansion, creep, and water absorption by 14.0%, 17.1%, and 13.1%. The low molecular weight fraction of multimodal HDPE facilitated miscibility with MAPE, promoted esterification, and minimized fiber damage, while the high molecular weight fraction enhanced composite integrity and cohesiveness. Notably, chain entanglement within the alloy was more critical than esterification rate in improving the mechanical and dimensional stability of UH-WPCs.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108830"},"PeriodicalIF":8.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520271","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}
Pub Date : 2025-02-27DOI: 10.1016/j.compositesa.2025.108832
Shuoxuan Ding , Xinyue Wang , Ashraf Ashour , Danna Wang , Tong Sun , Baoguo Han
Stainless steel wires (SSWs) with microscale diameter and high aspect ratio can form extensive electrically and thermally conductive networks within concrete at low contents. Combined with their high mechanical properties and corrosion resistance, SSWs enable concrete with self-heating capability and excellent thermal conductivity, as well as ultra-high mechanical properties and durability. Such SSWs enabled self-heating ultra-high performance concrete (SES-UHPC) can achieve active temperature control and on-site utilization of intermittent renewable energies, beneficial to reducing energy consumption and carbon emissions from building heating. Therefore, this study prepared SES-UHPC slabs embedded with Al2O3 tubes encapsulating either water or phase change material (PCM). The content levels of SSWs incorporated in test specimens were 0.5 vol%, 1.0 vol%, and 1.5 vol%. The electrical, self-heating, and thermal storage properties as well as the thermal storing-releasing model of these slabs were investigated. Furthermore, their building heating performances were verified in a simulated room. The results indicated that the SES-UHPC slab with 1.5 vol% of SSWs has an electrical conductivity as low as 2.0 Ω·cm, unaffected by temperature and thermal cycling. The slab with 1.5 vol% of SSWs can be heated from 20 °C to 80 °C with a power of 65 W in 6.8 h, and it continuously provides a total of 90.5 kJ heat supply for 14.4 h. The proposed thermal storing-releasing model based on Newton’s law of cooling can accurately describe the temperature of the slabs tested. In a simulated room, the SES-UHPC slabs with water/PCM kept the indoor temperature above 15 °C for 14.4 h to 10.3 h with outdoor temperatures of −5°C to −3°C and wind speed of up to 5.7 m/s.
{"title":"Developing electrothermal energy storage system for building heating by using stainless steel wires reinforced ultra-high performance concrete","authors":"Shuoxuan Ding , Xinyue Wang , Ashraf Ashour , Danna Wang , Tong Sun , Baoguo Han","doi":"10.1016/j.compositesa.2025.108832","DOIUrl":"10.1016/j.compositesa.2025.108832","url":null,"abstract":"<div><div>Stainless steel wires (SSWs) with microscale diameter and high aspect ratio can form extensive electrically and thermally conductive networks within concrete at low contents. Combined with their high mechanical properties and corrosion resistance, SSWs enable concrete with self-heating capability and excellent thermal conductivity, as well as ultra-high mechanical properties and durability. Such SSWs enabled self-heating ultra-high performance concrete (SES-UHPC) can achieve active temperature control and on-site utilization of intermittent renewable energies, beneficial to reducing energy consumption and carbon emissions from building heating. Therefore, this study prepared SES-UHPC slabs embedded with Al<sub>2</sub>O<sub>3</sub> tubes encapsulating either water or phase change material (PCM). The content levels of SSWs incorporated in test specimens were 0.5 vol%, 1.0 vol%, and 1.5 vol%. The electrical, self-heating, and thermal storage properties as well as the thermal storing-releasing model of these slabs were investigated. Furthermore, their building heating performances were verified in a simulated room. The results indicated that the SES-UHPC slab with 1.5 vol% of SSWs has an electrical conductivity as low as 2.0 Ω·cm, unaffected by temperature and thermal cycling. The slab with 1.5 vol% of SSWs can be heated from 20 °C to 80 °C with a power of 65 W in 6.8 h, and it continuously provides a total of 90.5 kJ heat supply for 14.4 h. The proposed thermal storing-releasing model based on Newton’s law of cooling can accurately describe the temperature of the slabs tested. In a simulated room, the SES-UHPC slabs with water/PCM kept the indoor temperature above 15 °C for 14.4 h to 10.3 h with outdoor temperatures of −5°C to −3°C and wind speed of up to 5.7 m/s.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"193 ","pages":"Article 108832"},"PeriodicalIF":8.1,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529200","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}
Pub Date : 2025-02-26DOI: 10.1016/j.compositesa.2025.108829
Shiyanova Kseniya , Torkunov Mikhail , Gudkov Maksim , Gulin Alexander , Knyazeva Alina , Ryvkina Natalia , Khashirov Azamat , Rabchinskii Maxim , Chmutin Igor , Melnikov Valery
The development of approaches to the creation of new materials with functional properties is one of the main directions for progress of their application in various fields. This work proposes an approach to surface modification of polyamide-12 (PA) powder with single-walled carbon nanotubes (SWCNTs) to impart electrical conductivity and create a material suitable for selective laser sintering (SLS) 3D printing. A previously unknown transition in the conductivity character change with increasing SWCNTs content on the surface of polymer powder particles, demonstrating a change in the state of the electrically conductive network from quasi-planar to spatial, was discovered. The main parameters of the resulting powders were also studied, which determine the possibility of their use for the SLS method: flowability, compactability, transmittance and morphology. As a result, a simple method of new materials obtaining based on PA/SWCNTs with high electrical conductivity was proposed, which are suitable for application in 3D printing.
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