Composites Part B: Engineering最新文献

英文中文

Enhanced EMI shielding and mechanical stability via deformable MXene-rNGO conductive networks in superelastic PDMS composite

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112198

Yaqiang Duan, Yuchen Gu, Weijun Yang, Pengwu Xu, Yunpeng Huang, Piming Ma

Traditional conductive composites are often vulnerable during the deformation process, leading to decrease electromagnetic interference (EMI) shielding efficiency (SE). In this work, a deformable conductive network was innovatively constructed by assembling multiple flexible interfaces to stabilize the EMI SE. The reduced N-doped graphene oxide (rNGO) and exfoliated MXene with different surface charges were successively coated on the surface of thermal expansion microspheres (TEMs, diameter about 11 μm) to construct a conductive shell with flexible splicing interfaces. Further, the assembled functional microspheres (TM@rNG-MX) were hybridized with poly(dimethysiloxane) (PDMS) and then thermally expanded to obtain the multifunctional PDMS/TM@rNG-MX composite. The dynamic connection between rNGO and MXene on the expanded TEMs (diameter about 29 μm) was efficient for establishing 3D deformable conductive networks, which remained intact even after significantly deforming the PDMS composite (strain of 80 %). Surprisingly, the EMI SE (X band) of PDMS/TM@rNG-MX reached 48.8 dB under a low filling content of rNGO and MXene (2.6 wt%), which remained stable after being stretched. In addition, PDMS/TM@rNG-MX had excellent superelasticity and fatigue resistance properties, and the energy loss coefficient reached 72.03 % at 80 % compression, indicating the extraordinary ability on absorbing impact energy. Therefore, this study presents an innovative approach to effectively enhance the mechanical stabilities and EMI shielding performance of flexible and conductive composites.

{"title":"Enhanced EMI shielding and mechanical stability via deformable MXene-rNGO conductive networks in superelastic PDMS composite","authors":"Yaqiang Duan, Yuchen Gu, Weijun Yang, Pengwu Xu, Yunpeng Huang, Piming Ma","doi":"10.1016/j.compositesb.2025.112198","DOIUrl":"10.1016/j.compositesb.2025.112198","url":null,"abstract":"<div><div>Traditional conductive composites are often vulnerable during the deformation process, leading to decrease electromagnetic interference (EMI) shielding efficiency (SE). In this work, a deformable conductive network was innovatively constructed by assembling multiple flexible interfaces to stabilize the EMI SE. The reduced N-doped graphene oxide (rNGO) and exfoliated MXene with different surface charges were successively coated on the surface of thermal expansion microspheres (TEMs, diameter about 11 μm) to construct a conductive shell with flexible splicing interfaces. Further, the assembled functional microspheres (TM@rNG-MX) were hybridized with poly(dimethysiloxane) (PDMS) and then thermally expanded to obtain the multifunctional PDMS/TM@rNG-MX composite. The dynamic connection between rNGO and MXene on the expanded TEMs (diameter about 29 μm) was efficient for establishing 3D deformable conductive networks, which remained intact even after significantly deforming the PDMS composite (strain of 80 %). Surprisingly, the EMI SE (X band) of PDMS/TM@rNG-MX reached 48.8 dB under a low filling content of rNGO and MXene (2.6 wt%), which remained stable after being stretched. In addition, PDMS/TM@rNG-MX had excellent superelasticity and fatigue resistance properties, and the energy loss coefficient reached 72.03 % at 80 % compression, indicating the extraordinary ability on absorbing impact energy. Therefore, this study presents an innovative approach to effectively enhance the mechanical stabilities and EMI shielding performance of flexible and conductive composites.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112198"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318646","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

All-in-One layer-structured multi-functional conductive polypyrrole coated polyimide aerogel

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112201

Chuming Ye , Yang Cheng , Mingxin Ye , Jianfeng Shen

Lacking remarkable electromagnetic interference (EMI) shielding materials has been one of the bottlenecks in developing modern electronic devices. Elicited by multifunctional applications in harsh environment, a compromise between high EMI shielding performance and good thermal insulation should be further achieved. However, promoting EMI shielding performance leads to unavoidable thermal insulation increase and mechanical property diminishing. Thus, besides the modification for inherent properties, structure design further unlocks the potential for enhancing applications, offering greater flexibility in optimizing physical properties. Confronting the challenges, the in-situ oxidation polymerized polypyrrole (PPy) coated channel-structured polyimide (PI) composite aerogel material (PIPY) was fabricated through directional freeze-drying. The in-situ oxidation polymerization ensures the formation of a thin and uniform film with both physical and chemical crosslinking, surpassing conventional methods. The ordered structure exhibits commendable electrical conductivity and remarkable anisotropic thermal insulation properties, with the electrical conductivity reaching up to 101.7 S/cm and the heat conductivity at 46 mW m⁻¹ K⁻¹ with 34.1 wt% PPy. The EMI shielding effectiveness of PIPY in the X band (8.2–12.5 GHz) and Ku band (11.9–18.0 GHz) reaches an impressive value of 81.6 dB. The thin PPy film ensures piezoresistive sensing, particularly in perceiving subtle pressure, such as "writing record", "signal transmission" and "motion monitoring", among others.

{"title":"All-in-One layer-structured multi-functional conductive polypyrrole coated polyimide aerogel","authors":"Chuming Ye , Yang Cheng , Mingxin Ye , Jianfeng Shen","doi":"10.1016/j.compositesb.2025.112201","DOIUrl":"10.1016/j.compositesb.2025.112201","url":null,"abstract":"<div><div>Lacking remarkable electromagnetic interference (EMI) shielding materials has been one of the bottlenecks in developing modern electronic devices. Elicited by multifunctional applications in harsh environment, a compromise between high EMI shielding performance and good thermal insulation should be further achieved. However, promoting EMI shielding performance leads to unavoidable thermal insulation increase and mechanical property diminishing. Thus, besides the modification for inherent properties, structure design further unlocks the potential for enhancing applications, offering greater flexibility in optimizing physical properties. Confronting the challenges, the in-situ oxidation polymerized polypyrrole (PPy) coated channel-structured polyimide (PI) composite aerogel material (PIPY) was fabricated through directional freeze-drying. The in-situ oxidation polymerization ensures the formation of a thin and uniform film with both physical and chemical crosslinking, surpassing conventional methods. The ordered structure exhibits commendable electrical conductivity and remarkable anisotropic thermal insulation properties, with the electrical conductivity reaching up to 101.7 S/cm and the heat conductivity at 46 mW m<sup>−1</sup> K<sup>−1</sup> with 34.1 wt% PPy. The EMI shielding effectiveness of PIPY in the X band (8.2–12.5 GHz) and Ku band (11.9–18.0 GHz) reaches an impressive value of 81.6 dB. The thin PPy film ensures piezoresistive sensing, particularly in perceiving subtle pressure, such as \"writing record\", \"signal transmission\" and \"motion monitoring\", among others.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112201"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318648","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

Mechanical performance of novel curved sandwich structures featuring 3D printed continuous carbon fiber/polyamide 6 composite corrugated core with rail interlocking

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112222

Hui-Jin Um , Hyun-Ji Rho , Na-Hyun Jeon , Ji-Hwan Shin , Hak-Sung Kim

The integration method of skin and core components in sandwich structures significantly influences their overall performance and functionality. This study introduces an innovative design for curved sandwich structures incorporating a rail interlocking mechanism, which demonstrates superior weight-specific mechanical properties compared to conventional joining techniques. The sandwich skins were fabricated using carbon fiber/epoxy composites prepregs via vacuum bagging, while the rail interlocking core structure was manufactured using 3D printing technology with continuous carbon fiber/polyamide filament. Mechanical performance was evaluated through three-point bending tests and compared with alternative joint configurations, including contact, adhesive, and bolt joints. Theoretical analysis was also conducted to derive failure strengths for various failure modes, and failure maps were constructed based on core and skin thickness. The results indicate that the rail interlocking structure exhibited superior mechanical performance, demonstrating an 18.8 % increase in specific strength and up to 22.9 % higher energy absorption capacity compared to adhesive model. The developed theoretical models accurately predicted failure loads across different failure mechanisms, demonstrating excellent agreement with experimental results, notably achieving a deviation of only 4.7 % for the adhesive model. It was noteworthy that the novel rail interlocking sandwich structure showed effectiveness in achieving lightweight design, superior mechanical performance, and practical advantages for curved and large-scale applications is particularly noteworthy.

{"title":"Mechanical performance of novel curved sandwich structures featuring 3D printed continuous carbon fiber/polyamide 6 composite corrugated core with rail interlocking","authors":"Hui-Jin Um , Hyun-Ji Rho , Na-Hyun Jeon , Ji-Hwan Shin , Hak-Sung Kim","doi":"10.1016/j.compositesb.2025.112222","DOIUrl":"10.1016/j.compositesb.2025.112222","url":null,"abstract":"<div><div>The integration method of skin and core components in sandwich structures significantly influences their overall performance and functionality. This study introduces an innovative design for curved sandwich structures incorporating a rail interlocking mechanism, which demonstrates superior weight-specific mechanical properties compared to conventional joining techniques. The sandwich skins were fabricated using carbon fiber/epoxy composites prepregs via vacuum bagging, while the rail interlocking core structure was manufactured using 3D printing technology with continuous carbon fiber/polyamide filament. Mechanical performance was evaluated through three-point bending tests and compared with alternative joint configurations, including contact, adhesive, and bolt joints. Theoretical analysis was also conducted to derive failure strengths for various failure modes, and failure maps were constructed based on core and skin thickness. The results indicate that the rail interlocking structure exhibited superior mechanical performance, demonstrating an 18.8 % increase in specific strength and up to 22.9 % higher energy absorption capacity compared to adhesive model. The developed theoretical models accurately predicted failure loads across different failure mechanisms, demonstrating excellent agreement with experimental results, notably achieving a deviation of only 4.7 % for the adhesive model. It was noteworthy that the novel rail interlocking sandwich structure showed effectiveness in achieving lightweight design, superior mechanical performance, and practical advantages for curved and large-scale applications is particularly noteworthy.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112222"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318660","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

Gallium containing high entropy alloy inhibits biofilm formation and enhances osseointegration

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112194

Xinchen Zhu , Junfeng Wang , Yun Du , Jian Zhang , Shubin Wang , Da Shu , Yihao Liu , Fupeng Li , Yixuan Lin , Yiqi Yang , Jiang Ju , Tao Yang , Jian He , Chunjie Liu , Kai Huang , Fengxiang Liu , Wentao Lin , Shengbing Yang

Prosthetic joint infections have gained tremendous attention in recent years due to their high treatment costs, severe personal consequences, and heavy social burdens. Antimicrobial high-entropy alloys (HEAs) are considered promising implant materials for PJI prevention because of their mechanical properties surpass those of conventional alloys. In this study, we developed a series of gallium (Ga)-containing HEAs and experimentally identified an appropriate addition ratio of Ga. These alloys not only demonstrated excellent mechanical properties and wear resistance but also exhibited strong antibiofilm activity against methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa (P.a), both common in orthopedic infections. Additionally, Ga-containing HEAs showed good biocompatibility and osteoblastic ability and significant antibacterial therapeutic effects in a dorsal subcutaneous implantation model. In conclusion, Ga-containing HEAs raw materials hold promise as ideal implant materials for orthopedic applications.

{"title":"Gallium containing high entropy alloy inhibits biofilm formation and enhances osseointegration","authors":"Xinchen Zhu , Junfeng Wang , Yun Du , Jian Zhang , Shubin Wang , Da Shu , Yihao Liu , Fupeng Li , Yixuan Lin , Yiqi Yang , Jiang Ju , Tao Yang , Jian He , Chunjie Liu , Kai Huang , Fengxiang Liu , Wentao Lin , Shengbing Yang","doi":"10.1016/j.compositesb.2025.112194","DOIUrl":"10.1016/j.compositesb.2025.112194","url":null,"abstract":"<div><div>Prosthetic joint infections have gained tremendous attention in recent years due to their high treatment costs, severe personal consequences, and heavy social burdens. Antimicrobial high-entropy alloys (HEAs) are considered promising implant materials for PJI prevention because of their mechanical properties surpass those of conventional alloys. In this study, we developed a series of gallium (Ga)-containing HEAs and experimentally identified an appropriate addition ratio of Ga. These alloys not only demonstrated excellent mechanical properties and wear resistance but also exhibited strong antibiofilm activity against methicillin-resistant <em>Staphylococcus aureus</em> (MRSA) and <em>Pseudomonas aeruginosa</em> (<em>P.a</em>), both common in orthopedic infections. Additionally, Ga-containing HEAs showed good biocompatibility and osteoblastic ability and significant antibacterial therapeutic effects in a dorsal subcutaneous implantation model. In conclusion, Ga-containing HEAs raw materials hold promise as ideal implant materials for orthopedic applications.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112194"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318663","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

Balancing mechanical properties in tungsten-alumina oxide alloys via coherent/semi-coherent interfaces

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112204

Fengsong Fan , Jie Wang , Haifeng Xu , Sijia Liu , Huihuang Song , Qiang Chen , Haoyang Wu , Gang Chen , Baorui Jia , Xuanhui Qu , Mingli Qin

The trade-off between strength and toughness has always presented a challenging issue in the development of high-performance metallic structural materials. Introducing hard, non-deforming particles in W metal can effectively enhance strength; however, the severe stress concentration at heterogeneous phasal interfaces often cause strain incompatibility, thereby deteriorating toughness. Here, we constructed robust coherent/semi-coherent W/Al₂O₃ interfaces to achieve a balance between strength and deformability of W/Al₂O₃ materials. Under 15 % compression deformation, our material exhibits a strength exceeding 2200 MPa and an impressive hardness of HV_0.2 = 637.4, among the best sintered dispersion-strengthened W alloys reported. The strong coherent/semi-coherent interfaces between W and Al₂O₃, as confirmed by TEM observations and DFT calculations, effectively hinder crack propagation along the phase boundaries, and instead, the cracks tear the Al₂O₃ particles dispersed at the W grain boundaries, considered responsible for the high ductility. This study provides new insights into the synergistic strengthening of dispersion-strengthened W alloys.

{"title":"Balancing mechanical properties in tungsten-alumina oxide alloys via coherent/semi-coherent interfaces","authors":"Fengsong Fan , Jie Wang , Haifeng Xu , Sijia Liu , Huihuang Song , Qiang Chen , Haoyang Wu , Gang Chen , Baorui Jia , Xuanhui Qu , Mingli Qin","doi":"10.1016/j.compositesb.2025.112204","DOIUrl":"10.1016/j.compositesb.2025.112204","url":null,"abstract":"<div><div>The trade-off between strength and toughness has always presented a challenging issue in the development of high-performance metallic structural materials. Introducing hard, non-deforming particles in W metal can effectively enhance strength; however, the severe stress concentration at heterogeneous phasal interfaces often cause strain incompatibility, thereby deteriorating toughness. Here, we constructed robust coherent/semi-coherent W/Al<sub>2</sub>O<sub>3</sub> interfaces to achieve a balance between strength and deformability of W/Al<sub>2</sub>O<sub>3</sub> materials. Under 15 % compression deformation, our material exhibits a strength exceeding 2200 MPa and an impressive hardness of HV<sub>0.2</sub> = 637.4, among the best sintered dispersion-strengthened W alloys reported. The strong coherent/semi-coherent interfaces between W and Al<sub>2</sub>O<sub>3</sub>, as confirmed by TEM observations and DFT calculations, effectively hinder crack propagation along the phase boundaries, and instead, the cracks tear the Al<sub>2</sub>O<sub>3</sub> particles dispersed at the W grain boundaries, considered responsible for the high ductility. This study provides new insights into the synergistic strengthening of dispersion-strengthened W alloys.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112204"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101782","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

Multistep crystallization pathways of a new carbonation-hardened Ternesite binder

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112215

Yangrui Li , Yanfei Yue , Xueping Peng , Jueshi Qian

Developing low-carbon clinkers and binding materials is a promising way to achieve net zero in cement industry. Ternesite is a low-carbon clinker mineral in terms of reduced CaO content and sintering temperature. More importantly, its hydration inertness can be compensated by carbonation curing to develop high strength rapidly. This investigation hence aims at disclosing the mechanisms and kinetics associated with carbonation hardening of ternesite. The X-ray diffraction, thermogravimetry, Raman spectroscopy and ²⁹Si nuclear magnetic resonance were used to determine the phase assemblage evolution of carbonated ternesite at different periods, while back-scattered electron microscopy and scanning electron microscopy with energy dispersive spectroscopy were employed to illustrate the microstructure characteristics. The calcium carbonates formed in carbonated ternesite were calcite, aragonite and more interestingly amorphous phase and monohydrocalcite, with the crystallization degree increased with carbonation time. Si transferred into highly polymerized Q³ and Q⁴ units, with content increased with time. This unique carbonation behavior of ternesite should be governed by the competition on “capturing” Ca between C, Si and S. The Ca²⁺ is partially combined with SO₄²⁻ to form gypsum, which leads to decreased Ca/C ratio of calcium carbonate and thus weak crystallization, also lower Ca/Si ratio of silica gel hence higher polymerization degree.

{"title":"Multistep crystallization pathways of a new carbonation-hardened Ternesite binder","authors":"Yangrui Li , Yanfei Yue , Xueping Peng , Jueshi Qian","doi":"10.1016/j.compositesb.2025.112215","DOIUrl":"10.1016/j.compositesb.2025.112215","url":null,"abstract":"<div><div>Developing low-carbon clinkers and binding materials is a promising way to achieve net zero in cement industry. Ternesite is a low-carbon clinker mineral in terms of reduced CaO content and sintering temperature. More importantly, its hydration inertness can be compensated by carbonation curing to develop high strength rapidly. This investigation hence aims at disclosing the mechanisms and kinetics associated with carbonation hardening of ternesite. The X-ray diffraction, thermogravimetry, Raman spectroscopy and <sup>29</sup>Si nuclear magnetic resonance were used to determine the phase assemblage evolution of carbonated ternesite at different periods, while back-scattered electron microscopy and scanning electron microscopy with energy dispersive spectroscopy were employed to illustrate the microstructure characteristics. The calcium carbonates formed in carbonated ternesite were calcite, aragonite and more interestingly amorphous phase and monohydrocalcite, with the crystallization degree increased with carbonation time. Si transferred into highly polymerized Q<sup>3</sup> and Q<sup>4</sup> units, with content increased with time. This unique carbonation behavior of ternesite should be governed by the competition on “capturing” Ca between C, Si and S. The Ca<sup>2+</sup> is partially combined with SO<sub>4</sub><sup>2−</sup> to form gypsum, which leads to decreased Ca/C ratio of calcium carbonate and thus weak crystallization, also lower Ca/Si ratio of silica gel hence higher polymerization degree.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112215"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101831","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

Next-generation green intelligent self-sensing geopolymer composites for enhancing construction security and sustainability: A review

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112191

Dongyu Wang , Zuhua Zhang , Yingcan Zhu , Kequan Yu , Chaolie Ning , Xiaolong Jia , Yingxin Hui , Ying Li , Qing Chen , Nemkumar Banthia , Zhengwu Jiang

In the context of the construction and buildings driving towards security and sustainability, there is an increasing demand for smart and green building materials. Self-sensing cement composites (SSCCs) have emerged as a viable solution, proving continuous real-time and in-situ time structural health monitoring (SHM). By using geopolymer as a green binder, self-sensing geopolymer composites (SSGCs) are emerging as a promising alternative to SSCCs, which traditionally using ordinary Portland cement (OPC) as binder. SSGCs are advantaged in lower-carbon emission, significantly enhanced corrosion resistance, and comparable or superior mechanical strength compared to SSCCs. Their unique composition and microstructure, characterized by high alkali ions concentrations from activators and a large number of micropores, endow SSGCs with exceptional electrical conductivity and sensing properties. This paper presents an in-depth review of the latest research, focusing on the intrinsic characterizations, properties and mechanisms of SSGCs, with particular emphasis on the conductive and sensing mechanisms arising from the composition interaction and pore characteristics. It also discusses the challenges and future perspectives in terms of manufacture and application for SSGCs. Their development is pivotal for bolstering structural security, enhancing construction sustainability and minimizing maintenance costs, marking a substantial leap towards a next-generation green intelligent infrastructure.

{"title":"Next-generation green intelligent self-sensing geopolymer composites for enhancing construction security and sustainability: A review","authors":"Dongyu Wang , Zuhua Zhang , Yingcan Zhu , Kequan Yu , Chaolie Ning , Xiaolong Jia , Yingxin Hui , Ying Li , Qing Chen , Nemkumar Banthia , Zhengwu Jiang","doi":"10.1016/j.compositesb.2025.112191","DOIUrl":"10.1016/j.compositesb.2025.112191","url":null,"abstract":"<div><div>In the context of the construction and buildings driving towards security and sustainability, there is an increasing demand for smart and green building materials. Self-sensing cement composites (SSCCs) have emerged as a viable solution, proving continuous real-time and in-situ time structural health monitoring (SHM). By using geopolymer as a green binder, self-sensing geopolymer composites (SSGCs) are emerging as a promising alternative to SSCCs, which traditionally using ordinary Portland cement (OPC) as binder. SSGCs are advantaged in lower-carbon emission, significantly enhanced corrosion resistance, and comparable or superior mechanical strength compared to SSCCs. Their unique composition and microstructure, characterized by high alkali ions concentrations from activators and a large number of micropores, endow SSGCs with exceptional electrical conductivity and sensing properties. This paper presents an in-depth review of the latest research, focusing on the intrinsic characterizations, properties and mechanisms of SSGCs, with particular emphasis on the conductive and sensing mechanisms arising from the composition interaction and pore characteristics. It also discusses the challenges and future perspectives in terms of manufacture and application for SSGCs. Their development is pivotal for bolstering structural security, enhancing construction sustainability and minimizing maintenance costs, marking a substantial leap towards a next-generation green intelligent infrastructure.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"295 ","pages":"Article 112191"},"PeriodicalIF":12.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143318682","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

Corrigendum to “A quick and effective modification method to improve the patency and endothelialization of cryopreserved allogenic blood vessels” [Compos B Eng, 2024: 283, 111628]

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112177

Jingai Zhang , Yamin Liu , Ye Wan , Shanshan Kang , Quhan Cheng , Xin Kong , Ting Wang , Lei Cao , Xiaofeng Li , Shafiq Muhammad , Xianhui Liang , Pei Wang , Deling Kong , Kai Wang

引用次数: 0

Novel repair of bolted composite joints using 3D printed continuous fibre patches with custom fibre paths

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112212

Aonan Li, Yahui Lyu, Bin Yang, Dongmin Yang

Extending the service life of composite structures often involves various repair techniques, particularly for thermoset composites, which require specialised approaches. Given the rising significance of bolted composite joints in assembling composite structures, evaluating their repairability has become increasingly important. This study presents a novel approach for repairing deformed bolt holes in mechanically fastened thermoset composite plates, which are commonly considered as non-reusable under service conditions. The approach involves utilizing 3D printing techniques to custom-fabricate bespoke continuous carbon fibre patches, with specifically tailored shapes, to restore bolt holes in thermoset material systems to their original dimensions and functionality. Two repair configurations were proposed to investigate the enhancement of mechanical performance. This customized solution not only recovers mechanical properties to a certain degree but also significantly enhances its resistance to initial damage, specifically increasing the initial strength by up to 60.79 % and the initial fracture energy absorption by up to 205.01 %, compared to the original specimen. A multi-scale finite element (FE) model was applied to illustrate post-repair failure mechanisms, incorporating the LaRC05 criterion for predicting intralaminar failure and a cohesive model for simulating interlaminar failure. Furthermore, comparative analysis through mechanical tests, X-ray micro-computed tomography (micro-CT) characterisation and finite element (FE) modelling demonstrates that the continuous fibre repair patch, designed based on finite element analysis, significantly outperforms simpler, geometrically based paths in overall repair efficacy. This improvement is achieved by strategically designing the fibre to endure varying stress conditions across different regions, resulting in an additional recovery of initial peak strength, ultimate strength, initial fracture energy and ultimate fracture energy absorption by 32.69 %, 11.11 %, 130.59 % and 25.09 % respectively, compared to simpler, geometrically based paths.

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引用次数: 0

An innovative fabrication method of heat sink achieving by selective-orienting co-continuous short fibers network composites

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesb.2025.112193

Cheng Yang , Lehua Qi , Xujiang Chao , Kang Yun , Haoteng Hu , Jiming Zhou , Hejun Li

For short fiber-reinforced composite heat dissipation components, designing the local fiber orientation and spatial structure according to heat dissipation principles is crucial for enhancing reinforcement efficiency and improving the performance of heat dissipation devices. In this work, based on the realizing of three-dimensional continuous networks of pyrolytic carbon-short carbon fiber (PyC-C_sf) with controllable orientations, we propose an innovative local-global designed and integrated preparation strategy for high-thermal conductive magnesium (Mg) composites heat sink. The tunable local thermal properties of the composites are achieved by adjusting the orientations of the short fibers, and the heat sink is near-net formed by the liquid-solid extrusion following vacuum infiltration technique. The fins and substrate of the heat sink exhibit a thermal conductivity of 101.6 W/m·K and 134.6 W/m·K, which increased by 111.5 % and 180.4 % compared to the Mg matrix, respectively. The TC enhancement is mainly caused by the quasi-alignment fibers in the substrate and planar isotropic orientation in the fins of the heat sink. This work describes a scalable fabrication method for developing metal matrix composite components with thermal conductive selective-orienting co-continuous short fibers network. It highlights the potential of C_sf/Mg composites for thermal management and provides an important step toward realizing their actual real-world applications.

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