Pub Date : 2025-02-18DOI: 10.1016/j.compositesb.2025.112301
Keita Sato , Taketoshi Koita , Manabu Inutsuka , Koji Yamaguchi , Masao Kimura , Chiharu Tokoro
To promote the sustainable use of carbon fiber-reinforced polymers (CFRPs), the efficient recovery and recycling of carbon fibers (CFs) from used CFRP products is required. In this study, a direct pulsed discharge with high voltage was applied to CFRP samples for quick, low-cost dismantling and CF separation. It was found that direct pulsed discharge results in the effective destruction of CFRP, particularly in regions where the CFs are aligned parallel to the applied current. This implies that pulsed discharge is a promising method for the coarse dismantling of laminated CFRP. High-speed video camera observations, X-ray computed tomography, and electric field simulations revealed that Joule heat generated from the large current through the CFs rapidly gasifies the surrounding resin, resulting in the destruction of the CFRP.
{"title":"Disassembly of laminated CFRP using direct pulsed discharge","authors":"Keita Sato , Taketoshi Koita , Manabu Inutsuka , Koji Yamaguchi , Masao Kimura , Chiharu Tokoro","doi":"10.1016/j.compositesb.2025.112301","DOIUrl":"10.1016/j.compositesb.2025.112301","url":null,"abstract":"<div><div>To promote the sustainable use of carbon fiber-reinforced polymers (CFRPs), the efficient recovery and recycling of carbon fibers (CFs) from used CFRP products is required. In this study, a direct pulsed discharge with high voltage was applied to CFRP samples for quick, low-cost dismantling and CF separation. It was found that direct pulsed discharge results in the effective destruction of CFRP, particularly in regions where the CFs are aligned parallel to the applied current. This implies that pulsed discharge is a promising method for the coarse dismantling of laminated CFRP. High-speed video camera observations, X-ray computed tomography, and electric field simulations revealed that Joule heat generated from the large current through the CFs rapidly gasifies the surrounding resin, resulting in the destruction of the CFRP.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112301"},"PeriodicalIF":12.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471731","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}
Pub Date : 2025-02-18DOI: 10.1016/j.compositesb.2025.112313
Aiguo Wang , Zhijie Xu , Yingjie Chu , Jian-Guo Dai , Qiong Xu , Kaiwei Liu , Yi Ding , Daosheng Sun
High porosity and complex morphological characteristics of coral coarse aggregates typically lead to low strength, poor durability, and significant variability in coral concrete properties. This study examined the diverse properties of coral sand produced by jaw crushing and mechanical ball milling respectively. The geometric characteristics of the coral sand were quantitatively analyzed, and the effects of two processing methods on the morphology and porosity of coral sand were explored. Coral sands produced by each method were combined into coral fine aggregates with varying gradations, and the intrinsic relationship between the characteristics of coral fine aggregate and its concrete properties and porosity was explored. The results demonstrated that jaw crushing or ball milling significantly improved particle morphology and reduced porosity of the coral aggregates. Jaw crushing coral sand predominantly exhibited transverse fractures, while mechanical ball milling coral sand often exhibited longitudinal fractures. Under equivalent grading conditions, ball-milled coral sand achieved higher packing density and apparent density, alongside lower void ratios and water absorption rates. The study further demonstrated that the porosity, morphology, and gradation of the fine aggregates are crucial determinants of coral concrete's performance. B-II2.7 coral fine aggregate was tightly packed and the morphology of coral sand was good. The fluidity and 7-day compressive strength of CB-II2.7 had increased by 24.2 % and 27.7 % respectively compared to these of CJ-I3.4, and its porosity had decreased by 29.8 %.
{"title":"Numerical characterization of the geometric shape of coral sand by particle shaping and study on the properties of graded composite coral fine aggregate","authors":"Aiguo Wang , Zhijie Xu , Yingjie Chu , Jian-Guo Dai , Qiong Xu , Kaiwei Liu , Yi Ding , Daosheng Sun","doi":"10.1016/j.compositesb.2025.112313","DOIUrl":"10.1016/j.compositesb.2025.112313","url":null,"abstract":"<div><div>High porosity and complex morphological characteristics of coral coarse aggregates typically lead to low strength, poor durability, and significant variability in coral concrete properties. This study examined the diverse properties of coral sand produced by jaw crushing and mechanical ball milling respectively. The geometric characteristics of the coral sand were quantitatively analyzed, and the effects of two processing methods on the morphology and porosity of coral sand were explored. Coral sands produced by each method were combined into coral fine aggregates with varying gradations, and the intrinsic relationship between the characteristics of coral fine aggregate and its concrete properties and porosity was explored. The results demonstrated that jaw crushing or ball milling significantly improved particle morphology and reduced porosity of the coral aggregates. Jaw crushing coral sand predominantly exhibited transverse fractures, while mechanical ball milling coral sand often exhibited longitudinal fractures. Under equivalent grading conditions, ball-milled coral sand achieved higher packing density and apparent density, alongside lower void ratios and water absorption rates. The study further demonstrated that the porosity, morphology, and gradation of the fine aggregates are crucial determinants of coral concrete's performance. B-II<sub>2.7</sub> coral fine aggregate was tightly packed and the morphology of coral sand was good. The fluidity and 7-day compressive strength of CB-II<sub>2.7</sub> had increased by 24.2 % and 27.7 % respectively compared to these of CJ-I<sub>3.4</sub>, and its porosity had decreased by 29.8 %.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112313"},"PeriodicalIF":12.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487471","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}
Pub Date : 2025-02-18DOI: 10.1016/j.compositesb.2025.112296
Jie Li , Bin Liu , Qingtan Ren , Jingjie Cheng , Jinhao Tan , Jie Sheng , Changsheng Xing , Yunzhong Wu , Lidong Wang , Weidong Fei
The sintering and densification of graphene/ceramic composites pose significant challenges owing to the high melting point of graphene and ceramic phases. Here we address these challenges by using boron, silicon, and graphene as raw materials to prepare graphene/ceramic composites via spark plasma sintering (SPS) at 1600 °C. Boron and silicon significantly reduce the sintering temperature and improve the relative density of the composites. The abundant Y-type carbon structures effectively inhibit the sliding between graphene layers, improving the shear strength of few-layer graphene. Additionally, the strong Si–C and B–C interfacial bonding synergistically reinforce the composites, leading to exceptional mechanical strength, with the flexural strength of 561 MPa, the compressive strength up to 2.17 GPa, and the microscale compressive strength reaching 11.3 GPa (700 nm in diameter). Meanwhile, the composite exhibits impressive fracture toughness of 7.5 MPa·m1/2. Molecular dynamics simulations indicate that Y-type carbon structures allow for plastic deformation. The graphene/ceramic composites not only demonstrate superior strengths but are also easy to prepare, making them particularly advantageous for wear-resistant components, ballistic armor and aerospace materials.
{"title":"Nanoarchitected graphene/ceramic composites","authors":"Jie Li , Bin Liu , Qingtan Ren , Jingjie Cheng , Jinhao Tan , Jie Sheng , Changsheng Xing , Yunzhong Wu , Lidong Wang , Weidong Fei","doi":"10.1016/j.compositesb.2025.112296","DOIUrl":"10.1016/j.compositesb.2025.112296","url":null,"abstract":"<div><div>The sintering and densification of graphene/ceramic composites pose significant challenges owing to the high melting point of graphene and ceramic phases. Here we address these challenges by using boron, silicon, and graphene as raw materials to prepare graphene/ceramic composites via spark plasma sintering (SPS) at 1600 °C. Boron and silicon significantly reduce the sintering temperature and improve the relative density of the composites. The abundant Y-type carbon structures effectively inhibit the sliding between graphene layers, improving the shear strength of few-layer graphene. Additionally, the strong Si–C and B–C interfacial bonding synergistically reinforce the composites, leading to exceptional mechanical strength, with the flexural strength of 561 MPa, the compressive strength up to 2.17 GPa, and the microscale compressive strength reaching 11.3 GPa (700 nm in diameter). Meanwhile, the composite exhibits impressive fracture toughness of 7.5 MPa·m<sup>1/2</sup>. Molecular dynamics simulations indicate that Y-type carbon structures allow for plastic deformation. The graphene/ceramic composites not only demonstrate superior strengths but are also easy to prepare, making them particularly advantageous for wear-resistant components, ballistic armor and aerospace materials.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112296"},"PeriodicalIF":12.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453781","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}
Pub Date : 2025-02-18DOI: 10.1016/j.compositesb.2025.112308
Jie Li, Boya Zhang, Xiao Yuan, Xuanjie Zhang, Yixuan Li, Weidong Cao, Xingwen Li
The increasing demand for high power density and compact size devices in modern electrical and electronic systems requires polymer materials with excellent high-temperature electrical properties. However, electrical properties and thermal stability are often mutually exclusive in current polymer dielectric materials. Here, we report a strategy to achieve a well balance between thermal and dielectric properties by tailoring the molecular structure of epoxy resin (EP) curing agents. With the rigid benzene ring providing high thermal stability, the carrier density is controlled by modulating the non-localized electron density through substitution with strong electron-withdrawing groups and aliphatic structures, while the intermolecular charge conjugation transport is blocked by altering the conformation between molecular chains through grafting of side chain groups. By synergistically combining the two strategies within the same curing agent, the resultant polymer exhibits a volume resistance of 3.76 × 1013 Ω m and a direct current breakdown strength of 243.23 kV mm−1 at 120 °C. It also demonstrates potential applications in DC transmission systems and power electronics packaging, providing a new direction for the development of next-generation insulating polymers for harsh environments.
{"title":"Benzene ring structural design strategy toward well-balanced thermal and electrical properties in epoxy dielectric polymers","authors":"Jie Li, Boya Zhang, Xiao Yuan, Xuanjie Zhang, Yixuan Li, Weidong Cao, Xingwen Li","doi":"10.1016/j.compositesb.2025.112308","DOIUrl":"10.1016/j.compositesb.2025.112308","url":null,"abstract":"<div><div>The increasing demand for high power density and compact size devices in modern electrical and electronic systems requires polymer materials with excellent high-temperature electrical properties. However, electrical properties and thermal stability are often mutually exclusive in current polymer dielectric materials. Here, we report a strategy to achieve a well balance between thermal and dielectric properties by tailoring the molecular structure of epoxy resin (EP) curing agents. With the rigid benzene ring providing high thermal stability, the carrier density is controlled by modulating the non-localized electron density through substitution with strong electron-withdrawing groups and aliphatic structures, while the intermolecular charge conjugation transport is blocked by altering the conformation between molecular chains through grafting of side chain groups. By synergistically combining the two strategies within the same curing agent, the resultant polymer exhibits a volume resistance of 3.76 × 10<sup>13</sup> Ω m and a direct current breakdown strength of 243.23 kV mm<sup>−1</sup> at 120 °C. It also demonstrates potential applications in DC transmission systems and power electronics packaging, providing a new direction for the development of next-generation insulating polymers for harsh environments.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112308"},"PeriodicalIF":12.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487479","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}
Pub Date : 2025-02-17DOI: 10.1016/j.compositesb.2025.112315
Jeongcheol Kim , Sukwon Kang , Il Seong , Jeong Woo Jeon , Donghyen Lee , Jong-Hyun Kim , Dong-Jun Kwon
This study investigates the enhancement of weather resistance in carbon fiber-reinforced plastic (CFRP) by controlling the polymer matrix, focusing on the effects of acrylic resin. As the application of CFRP expands across various industries, its durability in outdoor environments has become a critical factor for structural materials. The mechanical properties of the polymer matrix were evaluated through tensile and flexural tests, and it was found that acrylic resin exhibited approximately 15 % lower mechanical properties compared to epoxy resin. This difference was observed to result in reduced performance of acrylic-based composite materials under neat conditions. However, after UV exposure, acrylic-based CFRP was shown to resist yellowing and maintain its mechanical properties, whereas epoxy-based CFRP experienced a 16 % decrease. The surface of CFRP was analyzed using FE-SEM, and differences at the interface were identified: fiber exposure and damage were observed in epoxy-based CFRP, while only surface cracks occurred in acrylic-based CFRP. Surface energy analysis was conducted, and it was confirmed that UV degradation increased the dispersive component of epoxy-based CFRP due to exposed carbon fiber (CF). Surface analyses using XPS and FT-IR revealed changes in the chemical composition of the CFRP surfaces, with increased oxidation of epoxy-based CFRP after UV exposure, while the acrylic-based CFRP showed more stable surface chemistry. These findings suggest that acrylic-based CFRP can be utilized in applications requiring improved weather resistance and long-term stability.
{"title":"Advancing CFRP durability: Interfacial and weathering performance of epoxy and acrylic matrices","authors":"Jeongcheol Kim , Sukwon Kang , Il Seong , Jeong Woo Jeon , Donghyen Lee , Jong-Hyun Kim , Dong-Jun Kwon","doi":"10.1016/j.compositesb.2025.112315","DOIUrl":"10.1016/j.compositesb.2025.112315","url":null,"abstract":"<div><div>This study investigates the enhancement of weather resistance in carbon fiber-reinforced plastic (CFRP) by controlling the polymer matrix, focusing on the effects of acrylic resin. As the application of CFRP expands across various industries, its durability in outdoor environments has become a critical factor for structural materials. The mechanical properties of the polymer matrix were evaluated through tensile and flexural tests, and it was found that acrylic resin exhibited approximately 15 % lower mechanical properties compared to epoxy resin. This difference was observed to result in reduced performance of acrylic-based composite materials under neat conditions. However, after UV exposure, acrylic-based CFRP was shown to resist yellowing and maintain its mechanical properties, whereas epoxy-based CFRP experienced a 16 % decrease. The surface of CFRP was analyzed using FE-SEM, and differences at the interface were identified: fiber exposure and damage were observed in epoxy-based CFRP, while only surface cracks occurred in acrylic-based CFRP. Surface energy analysis was conducted, and it was confirmed that UV degradation increased the dispersive component of epoxy-based CFRP due to exposed carbon fiber (CF). Surface analyses using XPS and FT-IR revealed changes in the chemical composition of the CFRP surfaces, with increased oxidation of epoxy-based CFRP after UV exposure, while the acrylic-based CFRP showed more stable surface chemistry. These findings suggest that acrylic-based CFRP can be utilized in applications requiring improved weather resistance and long-term stability.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112315"},"PeriodicalIF":12.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437334","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}
Pub Date : 2025-02-17DOI: 10.1016/j.compositesb.2025.112299
Dibyajyoti D. Pradhan , A.P. Chakraverty , T. Badapanda , R. Nayak , U.K. Mohanty , M.R. Das
Conventional FRP composite suffers various problems due to improper curing, interfacial residual stress and environmental degradation. Such problems can be compensated by adopting partial use of carbon fibre in glass fibre based FRP composite and exposing such composite to energetic radiation for post-curing strengthening. Keeping this in mind, FRP composite samples with alternative glass and carbon fibre layers were irradiated through glow discharge plasma up to 35 min with air and argon maintained with 10–50 Watt power. About 113 % and 135 % increase in inter laminar and flexural strengths, respectively, were found with respect to argon plasma ageing for 30 min at 50 Watt power. At this power, about 14.7 % and 35 % increase in Tg was observed for the modified FRP with 15 min of air plasma and 30 min of argon plasma exposure, respectively. Maximum thermal activation energy was obtained through argon plasma irradiation. FTIR test revealed additional peaks at 1721 cm−1 and 3060 cm−1 for maximum power of argon-plasma treated FRP sample. Air and argon plasma at their optimized power and duration resulted increase in wettability with improved surface roughness. The failure modes of SEM fractographs indicated improved thermo-mechanical properties in plasma cured modified FRP.
{"title":"Property enhancement of alternating glass/carbon fibre laminated FRP composite by glow discharge post-plasma irradiation","authors":"Dibyajyoti D. Pradhan , A.P. Chakraverty , T. Badapanda , R. Nayak , U.K. Mohanty , M.R. Das","doi":"10.1016/j.compositesb.2025.112299","DOIUrl":"10.1016/j.compositesb.2025.112299","url":null,"abstract":"<div><div>Conventional FRP composite suffers various problems due to improper curing, interfacial residual stress and environmental degradation. Such problems can be compensated by adopting partial use of carbon fibre in glass fibre based FRP composite and exposing such composite to energetic radiation for post-curing strengthening. Keeping this in mind, FRP composite samples with alternative glass and carbon fibre layers were irradiated through glow discharge plasma up to 35 min with air and argon maintained with 10–50 Watt power. About 113 % and 135 % increase in inter laminar and flexural strengths, respectively, were found with respect to argon plasma ageing for 30 min at 50 Watt power. At this power, about 14.7 % and 35 % increase in T<sub>g</sub> was observed for the modified FRP with 15 min of air plasma and 30 min of argon plasma exposure, respectively. Maximum thermal activation energy was obtained through argon plasma irradiation. FTIR test revealed additional peaks at 1721 cm<sup>−1</sup> and 3060 cm<sup>−1</sup> for maximum power of argon-plasma treated FRP sample. Air and argon plasma at their optimized power and duration resulted increase in wettability with improved surface roughness. The failure modes of SEM fractographs indicated improved thermo-mechanical properties in plasma cured modified FRP.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112299"},"PeriodicalIF":12.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444505","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}
Pub Date : 2025-02-17DOI: 10.1016/j.compositesb.2025.112295
Yiping Li , Shaozhuo Ding , Zhimin An , Tengteng Xu , Rubing Zhang
High-temperature radar-infrared compatible stealth technology is one of the most feasible ways for military equipment to counter multi-band detection. Given the inherent contradiction between radar and infrared stealth mechanisms, current state-of-the-art compatible stealth solutions (composites, metastructures, and coatings) encounter three main challenges: significant thickness, single-function and poor high-temperature stability. In this context, an ultra-thin, compatible, and high-temperature-resistant stealth metacoating is realized by combining graded-control structure and self-synthesized high-temperature-resistant pastes. The metacoating is optimized based on a multi-objective optimization design method, which enhances overall impedance matching and facilitates graded control of the absorption and reflection in both radar and infrared bands. The tailored metacoating, with a thickness of only 110 μm and an area density of 0.011 g/cm2, demonstrates a long-term stable effective absorption bandwidth of 11.9 GHz (with reflection loss ≤ −8 dB) and an infrared emissivity of 0.46 at 800 °C. This research provides a valuable strategy for the development of "thin, light, wide-band, and compatible" high-temperature stealth coatings, highlighting its engineering significance.
{"title":"Ultra-thin compatible stealth metacoating: Graded control of radar and infrared waves under long-term high temperatures","authors":"Yiping Li , Shaozhuo Ding , Zhimin An , Tengteng Xu , Rubing Zhang","doi":"10.1016/j.compositesb.2025.112295","DOIUrl":"10.1016/j.compositesb.2025.112295","url":null,"abstract":"<div><div>High-temperature radar-infrared compatible stealth technology is one of the most feasible ways for military equipment to counter multi-band detection. Given the inherent contradiction between radar and infrared stealth mechanisms, current state-of-the-art compatible stealth solutions (composites, metastructures, and coatings) encounter three main challenges: significant thickness, single-function and poor high-temperature stability. In this context, an ultra-thin, compatible, and high-temperature-resistant stealth metacoating is realized by combining graded-control structure and self-synthesized high-temperature-resistant pastes. The metacoating is optimized based on a multi-objective optimization design method, which enhances overall impedance matching and facilitates graded control of the absorption and reflection in both radar and infrared bands. The tailored metacoating, with a thickness of only 110 μm and an area density of 0.011 g/cm<sup>2</sup>, demonstrates a long-term stable effective absorption bandwidth of 11.9 GHz (with reflection loss ≤ −8 dB) and an infrared emissivity of 0.46 at 800 °C. This research provides a valuable strategy for the development of \"thin, light, wide-band, and compatible\" high-temperature stealth coatings, highlighting its engineering significance.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112295"},"PeriodicalIF":12.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464907","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}
Pub Date : 2025-02-17DOI: 10.1016/j.compositesb.2025.112289
Yingying Zhao, Shengchang Zhang, Qibin Xu, Kaixiang Wang, Zhao Xu, Tingyu Long, Tao Jin, Mengjin Jiang, Pengqing Liu
Functionalizing carbon nanotubes and graphene in fiber-reinforced composites can enhance interfacial bonding while compromising the nanoparticles’ intrinsic thermal conductivity. Herein, a multi-scale simulation approach is introduced to design an interface structure, achieving synergistic improvement in both interfacial strength and thermal conductivity. The interface structure employs a combination of (3-Ureidopropyl)trimethoxysilane (SCA6) modified carbon nanotubes (CNT) and graphene (GR) overlap. Molecular dynamic simulations elucidate the formation of heat transfer pathways through SCA6-modified CNT and GR networks, facilitating multidirectional thermal transport. SCA6 modification not only optimizes phonon coupling between nanofilers and PA66 but also refines interfacial interactions, mitigating interfacial phonon scattering and fortifying resin-nanoparticle bonding. Interfacial traction-separation simulation (Mode-I, II, and mixed modes) demonstrates substantial improvements in BF-PA66 adhesion, with Mode-I separation stress exhibiting a transition from 0.25 MPa to 0.32 MPa. Electrostatic interactions emerge as the primary driver of interfacial enhancement. Finite element analysis confirms improved heat transfer and structural integrity of the composite, evidenced by a von Mises stress reduction from 3.75 × 102 MPa to 3.47 × 102 MPa in the BF-SCA6/CNT-GR/PA66. Experimental validation shows a 4.1-fold increase in thermal conductivity accompanied by mechanical property improvements, corroborating the effectiveness of the multi-scale simulation design.
{"title":"Synergistic enhancement of mechanical and thermal properties in basalt fiber reinforced composites through nanotube and graphene bridging structure: A multi-scale simulation","authors":"Yingying Zhao, Shengchang Zhang, Qibin Xu, Kaixiang Wang, Zhao Xu, Tingyu Long, Tao Jin, Mengjin Jiang, Pengqing Liu","doi":"10.1016/j.compositesb.2025.112289","DOIUrl":"10.1016/j.compositesb.2025.112289","url":null,"abstract":"<div><div>Functionalizing carbon nanotubes and graphene in fiber-reinforced composites can enhance interfacial bonding while compromising the nanoparticles’ intrinsic thermal conductivity. Herein, a multi-scale simulation approach is introduced to design an interface structure, achieving synergistic improvement in both interfacial strength and thermal conductivity. The interface structure employs a combination of (3-Ureidopropyl)trimethoxysilane (SCA6) modified carbon nanotubes (CNT) and graphene (GR) overlap. Molecular dynamic simulations elucidate the formation of heat transfer pathways through SCA6-modified CNT and GR networks, facilitating multidirectional thermal transport. SCA6 modification not only optimizes phonon coupling between nanofilers and PA66 but also refines interfacial interactions, mitigating interfacial phonon scattering and fortifying resin-nanoparticle bonding. Interfacial traction-separation simulation (Mode-I, II, and mixed modes) demonstrates substantial improvements in BF-PA66 adhesion, with Mode-I separation stress exhibiting a transition from 0.25 MPa to 0.32 MPa. Electrostatic interactions emerge as the primary driver of interfacial enhancement. Finite element analysis confirms improved heat transfer and structural integrity of the composite, evidenced by a von Mises stress reduction from 3.75 × 10<sup>2</sup> MPa to 3.47 × 10<sup>2</sup> MPa in the BF-SCA6/CNT-GR/PA66. Experimental validation shows a 4.1-fold increase in thermal conductivity accompanied by mechanical property improvements, corroborating the effectiveness of the multi-scale simulation design.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112289"},"PeriodicalIF":12.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453769","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}
Pub Date : 2025-02-17DOI: 10.1016/j.compositesb.2025.112317
Lucas Schraa , Carol Rodricks , Gerhard Kalinka , Karl Roetsch , Christina Scheffler , Anna Sambale , Kai Uhlig , Markus Stommel , Volker Trappe
This study investigates the suitability of the single fibre push-out (SFPO) test for the determination of the interfacial shear strength (IFSS) of injection moulded short fibre reinforced thermoplastics. It includes a detailed description of the required sample preparation steps and the boundary conditions of the SFPO setup. Experimental SFPO tests were carried out on PA66 GF, PPA GF35 and PA6 GF50 materials. Furthermore, a finite element model was set up to simulate the behaviour of these materials during this test. The numerical results showed that the inhomogeneous stress distribution in the fibre-matrix interphase during the test causes the measured apparent IFSS to underestimate the true strength of the interphase. The simulations put the experimental results into perspective and provide valuable information for the further development of the test setup. This study therefore not only provides new insights into the interphase strength of injection moulded short fibre reinforced thermoplastics, but also an insight into local load conditions during testing and thus an indication of the true IFSS.
{"title":"Characterisation and modelling of the fibre-matrix interface of short fibre reinforced thermoplastics using the push-out technique","authors":"Lucas Schraa , Carol Rodricks , Gerhard Kalinka , Karl Roetsch , Christina Scheffler , Anna Sambale , Kai Uhlig , Markus Stommel , Volker Trappe","doi":"10.1016/j.compositesb.2025.112317","DOIUrl":"10.1016/j.compositesb.2025.112317","url":null,"abstract":"<div><div>This study investigates the suitability of the single fibre push-out (SFPO) test for the determination of the interfacial shear strength (IFSS) of injection moulded short fibre reinforced thermoplastics. It includes a detailed description of the required sample preparation steps and the boundary conditions of the SFPO setup. Experimental SFPO tests were carried out on PA66 GF, PPA GF35 and PA6 GF50 materials. Furthermore, a finite element model was set up to simulate the behaviour of these materials during this test. The numerical results showed that the inhomogeneous stress distribution in the fibre-matrix interphase during the test causes the measured apparent IFSS to underestimate the true strength of the interphase. The simulations put the experimental results into perspective and provide valuable information for the further development of the test setup. This study therefore not only provides new insights into the interphase strength of injection moulded short fibre reinforced thermoplastics, but also an insight into local load conditions during testing and thus an indication of the true IFSS.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"297 ","pages":"Article 112317"},"PeriodicalIF":12.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453775","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}
Pub Date : 2025-02-17DOI: 10.1016/j.compositesb.2025.112300
Peijin Yang , Yugen Shi , Hesheng Hu , Yu Wang , Ye Wang , Xinran Li , Lu Zhang , Yiping Wang , Lei Yu , Huitang Xia , Yan Li , Jie Yin
Inflammation-dominated sympathetic innervation adjacent to the infarcted region plays a pivotal role in the pathogenesis of severe ventricular arrhythmias (VAs) following myocardial infarction (MI). Thus, targeting inflammation process and sympathetic innervation represents a promising therapeutic approach to prevent VAs in clinical settings. Herein, we developed intelligent injectable hydrogels using boronic ester dynamic crosslinking as a pH- and reactive oxygen species (ROS)-responsive mechanism. We synthesized fluorophenylboronic acid-modified gelatin (GelPB) and combined it with polyvinyl alcohol (PVA) to create GelPB/PVA hydrogels (GP-gel) loaded with c-type natriuretic peptide (CNP) and Sema3A. The efficacy of this smart hydrogel was evaluated in an MI model induced by left anterior descending coronary artery ligation. The drug-loaded hydrogel demonstrated the excellent anti-inflammatory, pro-angiogenic, and anti-nerve sprouting effects. Specifically, it reduced macrophages infiltration, promoted M2 macrophage polarization in the early post-MI phase, and enhanced the expression of CD31 and a-SMA. As a result, sympathetic hyperinnervation was suppressed, arrhythmia susceptibility was reduced, and electrical conduction velocity was improved. Additionally, a notable improvement in cardiac function was observed. In conclusion, hydrogel co-loaded with CNP and Sema3A offers a promising therapeutic strategy for addressing both malignant arrhythmia and heart failure post-MI.
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