Composites Part B: Engineering最新文献_第3页

Influence of strand size and morphology on the mechanical performance of recycled CF/PEKK composites: Harnessing waste for aerospace secondary load-bearing applications

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112232

Yağız Özbek , Abdulrahman Al-Nadhari , Volkan Eskizeybek , Mehmet Yıldız , Hatice Sinem Şaş

The flexibility and precision of automated fiber placement (AFP) have made it a standard methodology in the aviation industry. However, the use of continuous slit tapes along component lengths generates significant waste. This waste presents an opportunity for recycling into secondary load-bearing structures, particularly in applications where components are not subjected to extreme working conditions. In this study, carbon fiber-reinforced polyetherketoneketone (CF/PEKK) strands are recycled into randomly oriented strand (ROS) panels using a cost-effective, vacuum-assisted hot press process while maintaining aerospace-quality standards. Both long and short strand lengths, as well as shredded strands mimicking real-life industrial waste, are analyzed for their mechanical performance and geometric stability. Mechanical properties of the recycled CF/PEKK composites are evaluated through tensile, shear, compression, Izod impact, and dynamic mechanical analysis (DMA), using digital image correlation (DIC) for precise measurements. Additionally, topological 3D scanning is used to assess the geometric stability of the panels. Results indicate that short strands offer superior mechanical properties, while shredded strands perform comparably. This study makes a unique contribution by demonstrating the effective recycling of slit tape waste into high-performance composite materials, advancing sustainable practices in aerospace applications.

{"title":"Influence of strand size and morphology on the mechanical performance of recycled CF/PEKK composites: Harnessing waste for aerospace secondary load-bearing applications","authors":"Yağız Özbek , Abdulrahman Al-Nadhari , Volkan Eskizeybek , Mehmet Yıldız , Hatice Sinem Şaş","doi":"10.1016/j.compositesb.2025.112232","DOIUrl":"10.1016/j.compositesb.2025.112232","url":null,"abstract":"<div><div>The flexibility and precision of automated fiber placement (AFP) have made it a standard methodology in the aviation industry. However, the use of continuous slit tapes along component lengths generates significant waste. This waste presents an opportunity for recycling into secondary load-bearing structures, particularly in applications where components are not subjected to extreme working conditions. In this study, carbon fiber-reinforced polyetherketoneketone (CF/PEKK) strands are recycled into randomly oriented strand (ROS) panels using a cost-effective, vacuum-assisted hot press process while maintaining aerospace-quality standards. Both long and short strand lengths, as well as shredded strands mimicking real-life industrial waste, are analyzed for their mechanical performance and geometric stability. Mechanical properties of the recycled CF/PEKK composites are evaluated through tensile, shear, compression, Izod impact, and dynamic mechanical analysis (DMA), using digital image correlation (DIC) for precise measurements. Additionally, topological 3D scanning is used to assess the geometric stability of the panels. Results indicate that short strands offer superior mechanical properties, while shredded strands perform comparably. This study makes a unique contribution by demonstrating the effective recycling of slit tape waste into high-performance composite materials, advancing sustainable practices in aerospace applications.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112232"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427828","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

Hierarchical interfacial engineering of lyocell fiber/polybutylene succinate composites for robust biodegradable natural fiber–reinforced plastics

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112253

Seungoh Jung , Junsik Bang , Jungkyu Kim , Hyoseung Lim , Seojin Kim , In-Gyu Choi , Hyo Won Kwak

Natural fiber–reinforced plastics (NFRPs) are gaining attention due to increasing concerns about environmental pollution and energy efficiency. However, low-dimensional stability due to the high water absorption of natural fibers and poor interfacial bonding between natural fibers and the polymer matrix limit their use of NFRPs. In this study, nano/micro hierarchical structures and surface plasma treatment were introduced into NFRPs with a layer-by-layer (LbL) structure to address these drawbacks. A fibrous preform combining lyocell fiber (LF) and cellulose nanofibril (CNF) was fabricated, where CNF enhanced mechanical strength and moisture stability. Biodegradable polybutylene succinate (PBS) and the preform were hot pressed to fabricate LbL-structured PBS-LF/CNF NFRPs. The interfacial compatibility between PBS and the fibrous preforms was improved by hydrophilic plasma treatment of the PBS surface, and an increase in the moisture stability and tensile strength of the NFRP was observed. Ultimately, the NFRP with the CNF binder and hydrophilic plasma treatment showed improved mechanical properties, with a modulus of 980 %, tensile strength of 430 %, and toughness of 270 %, compared with neat PBS. In addition, PBS-LF/CNF NFRP biodegraded in a compost environment. These results suggest that PBS-LF/CNF NFRP can be used as a sustainable composite material in versatile industrial fields.

{"title":"Hierarchical interfacial engineering of lyocell fiber/polybutylene succinate composites for robust biodegradable natural fiber–reinforced plastics","authors":"Seungoh Jung , Junsik Bang , Jungkyu Kim , Hyoseung Lim , Seojin Kim , In-Gyu Choi , Hyo Won Kwak","doi":"10.1016/j.compositesb.2025.112253","DOIUrl":"10.1016/j.compositesb.2025.112253","url":null,"abstract":"<div><div>Natural fiber–reinforced plastics (NFRPs) are gaining attention due to increasing concerns about environmental pollution and energy efficiency. However, low-dimensional stability due to the high water absorption of natural fibers and poor interfacial bonding between natural fibers and the polymer matrix limit their use of NFRPs. In this study, nano/micro hierarchical structures and surface plasma treatment were introduced into NFRPs with a layer-by-layer (LbL) structure to address these drawbacks. A fibrous preform combining lyocell fiber (LF) and cellulose nanofibril (CNF) was fabricated, where CNF enhanced mechanical strength and moisture stability. Biodegradable polybutylene succinate (PBS) and the preform were hot pressed to fabricate LbL-structured PBS-LF/CNF NFRPs. The interfacial compatibility between PBS and the fibrous preforms was improved by hydrophilic plasma treatment of the PBS surface, and an increase in the moisture stability and tensile strength of the NFRP was observed. Ultimately, the NFRP with the CNF binder and hydrophilic plasma treatment showed improved mechanical properties, with a modulus of 980 %, tensile strength of 430 %, and toughness of 270 %, compared with neat PBS. In addition, PBS-LF/CNF NFRP biodegraded in a compost environment. These results suggest that PBS-LF/CNF NFRP can be used as a sustainable composite material in versatile industrial fields.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112253"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419984","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

Ultrasonic welding of thermoplastic composites: A comparison between polyetheretherketone and low-melt polyaryletherketone as resin in the adherends and energy directors

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112264

C.B.G. Brito, J. Teuwen, C.A. Dransfeld, I.F. Villegas

Our aim with this work was to evaluate how the thermoplastic resin used in the composite adherends and on the energy director affected the static ultrasonic welding process in both parallel and misaligned configurations. Polyetheretherketone (PEEK) and low-melt polyaryletherketone (LMPAEK) were the resins used and their thermomechanical properties were characterized via dynamic-mechanical analysis and modulated differential scanning calorimetry. With parallel adherends, neither the welding time nor the through-thickness heating in the adherends vary significantly. This similarity was attributed to a larger heat capacity of the PEEK energy director counterbalancing its higher viscoelastic heating rate. With misaligned adherends, the welding time was larger for PEEK welds than for LMPAEK welds and LMPAEK adherends presented a larger though-thickness heating. These effects were attributed to the larger bulk viscoelastic heating rate of carbon fibre reinforced/LMPAEK adherends adding up to the lower heat capacity of LMPAEK.

{"title":"Ultrasonic welding of thermoplastic composites: A comparison between polyetheretherketone and low-melt polyaryletherketone as resin in the adherends and energy directors","authors":"C.B.G. Brito, J. Teuwen, C.A. Dransfeld, I.F. Villegas","doi":"10.1016/j.compositesb.2025.112264","DOIUrl":"10.1016/j.compositesb.2025.112264","url":null,"abstract":"<div><div>Our aim with this work was to evaluate how the thermoplastic resin used in the composite adherends and on the energy director affected the static ultrasonic welding process in both parallel and misaligned configurations. Polyetheretherketone (PEEK) and low-melt polyaryletherketone (LMPAEK) were the resins used and their thermomechanical properties were characterized via dynamic-mechanical analysis and modulated differential scanning calorimetry. With parallel adherends, neither the welding time nor the through-thickness heating in the adherends vary significantly. This similarity was attributed to a larger heat capacity of the PEEK energy director counterbalancing its higher viscoelastic heating rate. With misaligned adherends, the welding time was larger for PEEK welds than for LMPAEK welds and LMPAEK adherends presented a larger though-thickness heating. These effects were attributed to the larger bulk viscoelastic heating rate of carbon fibre reinforced/LMPAEK adherends adding up to the lower heat capacity of LMPAEK.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112264"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403603","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

Enhancing bond properties between epoxy resins and cementitious materials through entropy-driven hydrophobic interaction

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112251

Zonglin Xie , Yi Tian , Fuwen Zhong , Gongkun Xiang , Suning Li , Qiang Yuan

The application of epoxy resin in coatings and grouting with cementitious materials significantly enhances structural durability by providing reinforcement and facilitating long-term maintenance. However, interface degradation between epoxy resin and cementitious materials remains a major challenge, especially in aggressive conditions. Drawing on the entropy-driven thermodynamic adhesion mechanism, this study introduces a novel approach to enhance bond strength via hydrophobic surface modification of the substrate. The treatment resulted in a 34.7 % increase in flexural bond strength, with the contact angle of the substrate rising from 17.2° to 101.4°. The primary driving force behind enhanced adhesion is the hydrophobic interaction between the benzene rings in the epoxy resin and the low surface free energy of alkyl groups on the cement surface. Furthermore, this improvement demonstrated long-term effectiveness under conditions of water immersion, thermo-oxidative aging, and ultraviolet exposure.

{"title":"Enhancing bond properties between epoxy resins and cementitious materials through entropy-driven hydrophobic interaction","authors":"Zonglin Xie , Yi Tian , Fuwen Zhong , Gongkun Xiang , Suning Li , Qiang Yuan","doi":"10.1016/j.compositesb.2025.112251","DOIUrl":"10.1016/j.compositesb.2025.112251","url":null,"abstract":"<div><div>The application of epoxy resin in coatings and grouting with cementitious materials significantly enhances structural durability by providing reinforcement and facilitating long-term maintenance. However, interface degradation between epoxy resin and cementitious materials remains a major challenge, especially in aggressive conditions. Drawing on the entropy-driven thermodynamic adhesion mechanism, this study introduces a novel approach to enhance bond strength via hydrophobic surface modification of the substrate. The treatment resulted in a 34.7 % increase in flexural bond strength, with the contact angle of the substrate rising from 17.2° to 101.4°. The primary driving force behind enhanced adhesion is the hydrophobic interaction between the benzene rings in the epoxy resin and the low surface free energy of alkyl groups on the cement surface. Furthermore, this improvement demonstrated long-term effectiveness under conditions of water immersion, thermo-oxidative aging, and ultraviolet exposure.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112251"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427829","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

Microstructure optimization of in-situ porous Ti particles reinforced Mg–Cu–Y metallic glass matrix composites via dealloying in metallic melt

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112263

Yuman Shao , Dijia Zhao , Wei Guo , Shulin Lü , Shusen Wu

The fabrication of bulk metallic glass matrix composites (BMGCs) reinforced with in-situ ductile particles is an effective way to enhance the mechanical properties of bulk metallic glasses (BMGs). Nevertheless, the formation of brittle crystalline phases tends to degrade the ductility of the BMGCs. In the present study, the in-situ porous Ti particles reinforced Mg–Cu–Y BMGCs have been successfully fabricated via dealloying in the metallic melt, and the brittle crystalline phases are eliminated by tailoring the composition of the amorphous matrix. (Mg_0.65Cu_0.25Y_0.10)₈₀Ti₂₀ (at. %) BMGCs reinforced solely with porous Ti particles show a high fracture strength (∼1131.8 MPa) and excellent plasticity (∼6.01 %). The in-situ porous Ti particles inhibit the rapid propagation of shear bands and promote their multiplication, thus significantly improving the plastic deformability. The results not only contribute to the development of Mg-based amorphous alloys with plasticity but also provide new ideas for the composition design and mechanical strengthening in BMGCs.

{"title":"Microstructure optimization of in-situ porous Ti particles reinforced Mg–Cu–Y metallic glass matrix composites via dealloying in metallic melt","authors":"Yuman Shao , Dijia Zhao , Wei Guo , Shulin Lü , Shusen Wu","doi":"10.1016/j.compositesb.2025.112263","DOIUrl":"10.1016/j.compositesb.2025.112263","url":null,"abstract":"<div><div>The fabrication of bulk metallic glass matrix composites (BMGCs) reinforced with <em>in-situ</em> ductile particles is an effective way to enhance the mechanical properties of bulk metallic glasses (BMGs). Nevertheless, the formation of brittle crystalline phases tends to degrade the ductility of the BMGCs. In the present study, the <em>in-situ</em> porous Ti particles reinforced Mg–Cu–Y BMGCs have been successfully fabricated via dealloying in the metallic melt, and the brittle crystalline phases are eliminated by tailoring the composition of the amorphous matrix. (Mg<sub>0.65</sub>Cu<sub>0.25</sub>Y<sub>0.10</sub>)<sub>80</sub>Ti<sub>20</sub> (at. %) BMGCs reinforced solely with porous Ti particles show a high fracture strength (∼1131.8 MPa) and excellent plasticity (∼6.01 %). The <em>in-situ</em> porous Ti particles inhibit the rapid propagation of shear bands and promote their multiplication, thus significantly improving the plastic deformability. The results not only contribute to the development of Mg-based amorphous alloys with plasticity but also provide new ideas for the composition design and mechanical strengthening in BMGCs.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112263"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403596","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

Enhancement of notched impact strength and flame retardancy in polycarbonate via micro-crosslinked polysiloxane

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112256

Yangming Zou, Jingfan Zhang, Xiaorong Guo, Yujie Kang, Xin Tong, Wei Liu, Xinqi Di, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang

Polycarbonate (PC) is a crucial engineering thermoplastic, but its impact strength is highly sensitive to notches, with even minor ones leading to significant reductions in mechanical performance. In this work, a crosslinked polysiloxane (VMQ) was synthesized and incorporated into PC to enhance both its toughness and flame retardancy. The introduction of VMQ greatly improved the notched impact strength and flame retardancy of PC. The addition of 5 wt% VMQ significantly enhanced the notched impact strength from 8.8 to 75.4 kJ/m², representing an improvement of 756.8 %. Furthermore, the elongation at break and tensile toughness increased by 61.2 % and 46.5 %, respectively. Notably, even at −10 °C, the enhanced notched impact strength was almost fully retained. Additionally, the PC/5%VMQ composite achieved a UL-94 V-0 rating, with a limiting oxygen index (LOI) of 28.7 %, a 38.2 % reduction in peak heat release rate (PHRR), and a 13.9 % decrease in total smoke production (TSP). The toughening and flame-retardant mechanisms of VMQ were thoroughly investigated. This work provides an innovative approach to simultaneously improve the flame retardancy and toughness of PC.

{"title":"Enhancement of notched impact strength and flame retardancy in polycarbonate via micro-crosslinked polysiloxane","authors":"Yangming Zou, Jingfan Zhang, Xiaorong Guo, Yujie Kang, Xin Tong, Wei Liu, Xinqi Di, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang","doi":"10.1016/j.compositesb.2025.112256","DOIUrl":"10.1016/j.compositesb.2025.112256","url":null,"abstract":"<div><div>Polycarbonate (PC) is a crucial engineering thermoplastic, but its impact strength is highly sensitive to notches, with even minor ones leading to significant reductions in mechanical performance. In this work, a crosslinked polysiloxane (VMQ) was synthesized and incorporated into PC to enhance both its toughness and flame retardancy. The introduction of VMQ greatly improved the notched impact strength and flame retardancy of PC. The addition of 5 wt% VMQ significantly enhanced the notched impact strength from 8.8 to 75.4 kJ/m<sup>2</sup>, representing an improvement of 756.8 %. Furthermore, the elongation at break and tensile toughness increased by 61.2 % and 46.5 %, respectively. Notably, even at −10 °C, the enhanced notched impact strength was almost fully retained. Additionally, the PC/5%VMQ composite achieved a UL-94 V-0 rating, with a limiting oxygen index (LOI) of 28.7 %, a 38.2 % reduction in peak heat release rate (PHRR), and a 13.9 % decrease in total smoke production (TSP). The toughening and flame-retardant mechanisms of VMQ were thoroughly investigated. This work provides an innovative approach to simultaneously improve the flame retardancy and toughness of PC.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112256"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419987","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

Simultaneously improving strength and ductility of carbon nanotube (CNT)-reinforced aluminum matrix composites by embedding CNTs inside matrix grains

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112240

Lin Cao , Biao Chen , Jie Wan , Jianghua Shen , Katsuyoshi Kondoh , Shufeng Li , Jinshan Li

The inadequate ductility of high-strength aluminum (Al) matrix composites (AMCs) reinforced with carbon nanotubes (CNTs) greatly limits their engineering applications. Here, we report a strategy to improve the ductility of CNTs/Al composites with increased tensile strength by embedding CNTs into matrix grains. Through a modified-ball-milling-involved powder metallurgy process, two kinds of AMCs were fabricated, one with most CNTs dispersed inside grains (IG) and the other one with most CNTs at boundaries between grains (BG). A reference composite with more randomly dispersed CNTs was also fabricated by conventional ball milling. Results showed that the IG-structured composites with different CNT contents had both higher tensile strength and ductility compared with the BG composites and the reference composite. This phenomenon was associated to the different interaction behaviors between matrix dislocations and the CNTs with IG or BG distribution as revealed by transmission electron microscopy. Molecular dynamic simulation clarified the microscopic interaction mechanisms between dislocations and CNTs in IG and BG structures during deformation. This study provides a new strategy for fabricating high-strength and ductile CNT-reinforced metal matrix composites.

{"title":"Simultaneously improving strength and ductility of carbon nanotube (CNT)-reinforced aluminum matrix composites by embedding CNTs inside matrix grains","authors":"Lin Cao , Biao Chen , Jie Wan , Jianghua Shen , Katsuyoshi Kondoh , Shufeng Li , Jinshan Li","doi":"10.1016/j.compositesb.2025.112240","DOIUrl":"10.1016/j.compositesb.2025.112240","url":null,"abstract":"<div><div>The inadequate ductility of high-strength aluminum (Al) matrix composites (AMCs) reinforced with carbon nanotubes (CNTs) greatly limits their engineering applications. Here, we report a strategy to improve the ductility of CNTs/Al composites with increased tensile strength by embedding CNTs into matrix grains. Through a modified-ball-milling-involved powder metallurgy process, two kinds of AMCs were fabricated, one with most CNTs dispersed inside grains (IG) and the other one with most CNTs at boundaries between grains (BG). A reference composite with more randomly dispersed CNTs was also fabricated by conventional ball milling. Results showed that the IG-structured composites with different CNT contents had both higher tensile strength and ductility compared with the BG composites and the reference composite. This phenomenon was associated to the different interaction behaviors between matrix dislocations and the CNTs with IG or BG distribution as revealed by transmission electron microscopy. Molecular dynamic simulation clarified the microscopic interaction mechanisms between dislocations and CNTs in IG and BG structures during deformation. This study provides a new strategy for fabricating high-strength and ductile CNT-reinforced metal matrix composites.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"296 ","pages":"Article 112240"},"PeriodicalIF":12.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403598","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

Silk fibroin electrospun scaffolds with sustained dual release of growth factors enhance acute liver failure treatment

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112260

Xiaojiao Liu , Xiaonan Shi , Daxu Zhang , Shuo Zhao , Jingjing Hu , Qinjun Ouyang , Jiao Yin , Xiang Yao , Yaopeng Zhang , Li Yan

Acute liver failure (ALF) is a critical disease with a rapid onset and a high mortality rate despite its low occurrence. Therefore, it is urgent to seek an efficient treatment strategy for ALF. Recently, the liver tissue engineering (LTE) based method has become a promising and emerging technology for ALF treatment. For improving its repair effect, herein, the pure regenerated silk fibroin (RSF) scaffold or RSF scaffold loaded with the hepatocyte growth factor (HGF) and fibroblast growth factor-4 (FGF-4) (named RSF/HGF/FGF-4 scaffold) were constructed from RSF aqueous solution by electrospinning technique. The aqueous system effectively maintains the activity of growth factors. HGF and FGF-4 could be controlled and sustained released from RSF/HGF/FGF-4 scaffold. Compared with pure RSF scaffold, the hydrophilicity and cytocompatibility of RSF/HGF/FGF-4 scaffold were significantly improved. Furthermore, RSF/HGF/FGF-4 scaffold also significantly promoted the hepatogenic differentiation of adipose-derived mesenchymal stem cells (ADSCs), even better than the group with directly adding growth factors in culture medium. In addition, the RSF/HGF/FGF-4 scaffolds seeded with ADSCs achieved an optimal liver function repair effect after the complex was implanted onto the surface of the injured liver in the ALF mice model. The effect was also much better than that of the scaffold without sustained growth factor releasing function. The developed RSF electrospun scaffold with sustained dual release of growth factors showed great application potential for the treatment of ALF.

急性肝衰竭（ALF）是一种危重疾病，虽然发病率低，但起病急、死亡率高。因此，寻求一种有效的治疗策略已迫在眉睫。近来，基于肝组织工程（LTE）的方法已成为治疗急性肝衰竭的一项前景广阔的新兴技术。为提高其修复效果，本文采用电纺丝技术，用RSF水溶液构建纯再生丝纤维蛋白（RSF）支架或负载肝细胞生长因子（HGF）和成纤维细胞生长因子-4（FGF-4）的RSF支架（命名为RSF/HGF/FGF-4支架）。该水溶液体系能有效保持生长因子的活性。HGF和FGF-4可以从RSF/HGF/FGF-4支架中得到控制和持续释放。与纯 RSF 支架相比，RSF/HGF/FGF-4 支架的亲水性和细胞相容性得到了显著改善。此外，RSF/HGF/FGF-4 支架还能显著促进脂肪间充质干细胞（ADSCs）的成肝分化，其效果甚至优于在培养基中直接添加生长因子的组别。此外，在 ALF 小鼠模型中，RSF/HGF/FGF-4 支架与 ADSCs 接种复合物植入损伤肝脏表面后，达到了最佳的肝功能修复效果。其效果也远远优于没有持续释放生长因子功能的支架。所开发的具有生长因子持续双重释放功能的RSF电纺支架在治疗ALF方面具有巨大的应用潜力。

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引用次数: 0

Incorporation of tantalum into PEEK and grafting of berbamine facilitate osteoblastogenesis for enhancing osseointegration and inhibit osteoclastogenesis for preventing aseptic loosening

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112242

Chongjing Zhang , En Xie , Zeyuan Zhong , Fan Wang , Shangyu Xie , Shaohui Huang , Dejian Li , Ping Sun , Baoqing Yu

Aseptic loosening resulting from periprosthetic osteolysis is still a common and serious complication of total joint arthroplasty, which represents the major cause of implant failure and revision surgery. Herein, a tantalum (Ta)/polyetheretherketone (PEEK) composite (TPK) was fabricated and berbamine was grafted on the TPK surface for enhancing osseointegration and preventing periprosthetic osteolysis. The surface properties (e.g., roughness, hydrophilicity) and mechanical properties (e.g., compressive strength, modulus of elasticity) of TPKB are remarkably improved owing to incorporation of tantalum into PEEK, whereas grafting of berbamine displays no obvious change. TPKB remarkably facilitated osteoblasts differentiation of mouse bone mesenchymal stem cells (BMSCs) in vitro and boosted osseointegration in vivo owing to the presence of tantalum, whereas berbamine exhibited no obvious influences. Moreover, TPKB obviously prevented osteoclast differentiation of mouse bone marrow-derived mononuclear macrophages (BMDMs) in vitro and significantly maintained osseointegration in vivo, even with polyethylene debris, and thereby effective alleviating debris-induced periprosthetic osteolysis owing to the sustained release of berbamine. Collectively, berbamine grafted on TPKB played the critical role in treatment of osteoclast-related periprosthetic osteolysis. This study provides a promising strategy to develop an implant that could address the problem of aseptic loosening in dual directions of enhancing osseointegration and treat debris-induced periprosthetic osteolysis.

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引用次数: 0

Heat transfer model for temperature-sensing polymer composite EV battery enclosure

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-02-10 DOI: 10.1016/j.compositesb.2025.112258

Tymon B. Nieduzak , Eleonora M. Tronci , Tianyi Zhou , Luke B. Demo , Maria Q. Feng , Venkat Aitharaju

Increased decarbonization efforts have led to greater Electric Vehicle (EV) adoption, with Lithium-Ion Batteries (LIBs) as the primary energy storage system. While generally safe, these batteries are susceptible to a catastrophic failure mode called thermal runaway, which can result in battery fires and explosions. To improve EV safety, a novel self-contained temperature-sensing LIB enclosure was proposed, functioning independently of other management systems. This study designed a Fiber Reinforced Polymer (FRP) composite enclosure to replace traditional metal ones, reducing weight while enabling temperature sensor embedment during manufacturing. Embedding sensors inside the composite mitigates space constraints and protects hardware but introduces a time lag in detecting internal temperature surges. This study characterizes that time lag through experiments and develops an accurate heat transfer model. A novel experimental setup was designed to replicate thermal runaway conditions, both thermal shock (fast surges) and thermal ramp-up (slow increases), on a temperature-sensing composite specimen. The experiments provided data for model calibration and validation. The 3D finite element heat transfer model was developed to study temperature propagation in composites with embedded sensors, considering anisotropic material complexities and transient boundary conditions. This model aligned well with experimental results, yielding mean absolute percentage errors below 0.065 %. It serves as a robust tool for simulating composite temperature responses under diverse thermal runaway scenarios. Additionally, the model was used to determine optimal sensor placement in a temperature-sensing composite enclosure. This study lays the groundwork for future research on inferencing and monitoring LIB enclosure interior temperatures for early thermal runaway warnings.

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引用次数: 0