Composites Part B: Engineering最新文献

{"title":"Near-infrared light-triggered smart response platform integrating CeO2@Black phosphorus for enhanced antimicrobial, anti-inflammatory, and osseointegration properties of titanium implants","authors":"Xin Wang ,&nbsp;Xuhong He ,&nbsp;Xuanyu Liu ,&nbsp;Mengjin Chen ,&nbsp;Yuhui Wang ,&nbsp;Chaiqiong Guo ,&nbsp;Jiapu Wang ,&nbsp;Hao Zhang ,&nbsp;Yanchao Hao ,&nbsp;Yan Wei ,&nbsp;Ziwei Liang ,&nbsp;Weimo Han ,&nbsp;Liqin Zhao ,&nbsp;Di Huang","doi":"10.1016/j.compositesb.2024.112044","DOIUrl":"10.1016/j.compositesb.2024.112044","url":null,"abstract":"<div><div>Titanium implants are extensively utilized in biomedical applications due to their exceptional physicochemical properties. However, bacterial infections and subsequent inflammatory reactions post-implantation can hinder the osseointegration. To address this challenge, we have developed a near-infrared (NIR) light-triggered smart response platform that integrates polydopamine-heterojunction nanomaterial CeO₂@black phosphorus (CeO₂@BP) onto the surface of alkali heat-treated titanium wafers. Under NIR laser intervention, the platform demonstrated efficient antimicrobial activity via a tripartite mechanism involving CeO₂@BP, photothermal therapy, and photodynamic therapy, achieving 99 % inhibition against <em>Pseudomonas aeruginosa</em> and <em>Staphylococcus aureus in vitro</em> antimicrobial assays. Results from live/dead staining, CCK8 assays, and scratch tests confirmed the platform's excellent biocompatibility and wound healing capabilities. After seven days of osteogenic induction of MC3T3-E1 cells <em>in vitro</em>, the platform significantly enhanced the expression of intracellular alkaline phosphatase, RUNX2, OCN, and HSP70, thereby facilitating calcium ion deposition. <em>In vivo</em>, the platform exhibited superior osseointegration and anti-inflammatory properties. Specifically, it suppressed the expression of the pro-inflammatory factor IL-6, enhanced the expression of the anti-inflammatory factor Arg-1, and promoted the phenotypic switch of macrophages from M1 to M2. These results suggest that this platform design contributes to the generation of a favorable bone immunomodulatory microenvironment, which enhances the antimicrobial, anti-inflammatory, and osseointegration capabilities of titanium implants, promising expanded clinical applications.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112044"},"PeriodicalIF":12.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758937","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}

{"title":"Polyethylene glycol modified polysiloxane and silver decorated expanded graphite composites with high thermal conductivity, EMI shielding, and leakage-free performance","authors":"Dexuan Lin ,&nbsp;Chi Yu ,&nbsp;Jianhua Guo ,&nbsp;Geng Li ,&nbsp;Xinghua Jiang ,&nbsp;Yuanwei Yao ,&nbsp;Xin Zhang","doi":"10.1016/j.compositesb.2024.112041","DOIUrl":"10.1016/j.compositesb.2024.112041","url":null,"abstract":"<div><div>Phase change thermal interface materials (PCTIMs) have attracted significant attention due to their dual capability in temperature control and thermal buffering. However, the widespread application of PCTIMs in electronic devices is hindered by critical drawbacks such as low thermal conductivity (к), absence of electromagnetic interference shielding effectiveness (EMI SE), poor flexibility, and susceptibility to leakage. In this study, leakage<strong>-</strong>free PCTIMs were successfully fabricated with ultra<strong>-</strong>high thermal conductivity (к_∥ = 23.4 W m⁻¹ K⁻¹, к_⊥ = 8.1 W m⁻¹ K⁻¹), outstanding phase change functionality, exceptional EMI SE (73.2 dB), and excellent flexibility. A polyethylene glycol-modified polydimethylsiloxane (pPDMS) was synthesized through chemical grafting, demonstrating its significant potential as substrates for PCTIMs. Moreover, a designed material called silver nanoparticles-decorated expanded graphite (Ag-EG), was prepared to facilitate multidimensional material collaboration and incorporated into the pPDMS matrix to obtain Ag<strong>-</strong>EG@pPDMS composites. This integration resulted in a three<strong>-</strong>dimensional (3D) multi<strong>-</strong>layer orientation structure that enabled superior thermal conductivity in both in<strong>-</strong>plane and through<strong>-</strong>plane directions. To investigate the influence of 3D multi<strong>-</strong>layer orientation structure on Ag<strong>-</strong>EG@pPDMS, theoretical analysis was conducted using Effective Medium Theory (EMT) and Foygel thermal conduction models, which were further simulated by finite element analysis confirming substantial enhancement in material properties attributed to the 3D multi<strong>-</strong>layer orientation structure. Thermal management and electromagnetic interference (EMI) shielding applications were conducted using computers, wireless bluetooth earphones, and other electronic devices, indicating the superior thermal conductivity and EMI shielding of Ag<strong>-</strong>EG@pPDMS composites.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112041"},"PeriodicalIF":12.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758939","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}

{"title":"Research progress in chemical vapor deposition for high-temperature anti-oxidation/ablation coatings on thermal structural composites","authors":"Jian Zhang ,&nbsp;Yulei Zhang ,&nbsp;Yanqin Fu ,&nbsp;Ruicong Chen ,&nbsp;Tao Li ,&nbsp;Xianghui Hou ,&nbsp;Hejun Li","doi":"10.1016/j.compositesb.2024.112015","DOIUrl":"10.1016/j.compositesb.2024.112015","url":null,"abstract":"<div><div>Carbon/carbon(C/C) and carbon/silicon carbide (C/SiC) composites reinforced with carbon fiber have become a promising thermal structural material in aerospace field due to their excellent properties. However, their highly susceptible to destructive oxidation and ablation at high temperatures, causing the rapid failure and compromising their distinctive structural advantages. To address these challenges, the implementation of high-temperature anti-oxidation/ablation (HTA) coating is considered as primary solution to mitigate the chemical and physical degradation of high strength thermal structural composites in high temperature environments. Moreover, chemical vapor deposition (CVD) has become one of the most important technologies for the preparation of HTA coating due to its capability to synthesize compact microstructures and uniformly coat intricate components. Herein, the study begins with the CVD process for the various types of HTA coating, the latest development of Si-based ceramic coatings and UHTC coatings (carbides, borides and partial nitrides) were outlined, including their preparation procedures and anti-oxidation/ablation properties. Furthermore, the current composition and structural design strategies for improving the mechanical and anti-oxidation/ablation performance of the coating were summarized, including constructing multi-phase/solid solution coatings, toughening coatings by nanowires and designing multi-layer structure. Finally, the current challenges and future development directions of CVD technology in the field of coating preparation were proposed. This review aims to offer valuable insights for researchers and engineers working in the fields of HTA coating and CVD technology.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112015"},"PeriodicalIF":12.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758941","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}

{"title":"Breathable sandwich laminates with dynamic infrared camouflage for all-weather scenarios","authors":"Mengyue Hu ,&nbsp;Chao Xiao ,&nbsp;Xiaofei Li ,&nbsp;Xiaoshuan Pan ,&nbsp;Xian Zhang ,&nbsp;Xianglan Liu ,&nbsp;Xin Ding ,&nbsp;Meng Xue ,&nbsp;Xingyou Tian ,&nbsp;Kang Zheng","doi":"10.1016/j.compositesb.2024.112014","DOIUrl":"10.1016/j.compositesb.2024.112014","url":null,"abstract":"<div><div>Infrared stealth technology played an important role in military, aerospace and other fields. However, it was currently a great challenge for all-weather infrared camouflage as well as infrared camouflage for military breathable clothing. In this paper, a three-layer structured polyimide film was prepared by laser etching and vacuum evaporation, which could be used for infrared camouflage in low and high temperature environments. The film had impressive waterproof and breathable properties. The main body of the film consisted of microporous polyimide (PIF). Forest-like vertical graphene arrays were constructed on the dense side of the PIF by adjusting the laser parameters. A layer of gold was then coated on the other side of the PIF to provide low emissivity properties. This three-layer structured composite film allowed the target to exhibit infrared radiation properties like the ambient background at both high and low temperatures. Waterproof and breathable properties could be applied to military infrared camouflage clothing fabrics. This work provided a promising solution strategy for the development of functional composite films in new military equipment.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112014"},"PeriodicalIF":12.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758938","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}

{"title":"Integration of MOF/COF core-shell composite material with wrinkled supramolecular hydrogel: A portable electrochemical sensing platform for noradrenaline bitartrate detection","authors":"Wang Sun,&nbsp;Guorong Sun,&nbsp;Junyan Liu,&nbsp;Xiang Huang,&nbsp;Yang Wang","doi":"10.1016/j.compositesb.2024.112029","DOIUrl":"10.1016/j.compositesb.2024.112029","url":null,"abstract":"<div><div>Predictably integration of rigid powder nanocrystals with flexible soft materials for rapid, accurate and portable detection of biological small molecules is an ongoing goal of researchers. In this research, the MOF/COF core-shell composite material (MIL-88B(FeCu)/COF) was constructed via monomer-mediated solvothermal approach. Subsequently, the MIL-88B(FeCu)/COF was effectively combined with chitosan-acrylamide based wrinkled supramolecular hydrogel to form a unique rigid-flexible composite material (MIL(FeCu)/COF@Hy). Next, the noradrenaline bitartrate (NB) was selected as a target molecule for electrochemical behavioral assessment. Of note, the portable electrochemical sensing platform constructed in this study does not require the use of solutions (chitosan or Nafion) to seal the electrode materials, and the portable device provides sufficient convenience for NB detection. And the excellent linear window (0.06–10 and 10–1600 μmol/L), sensitivity (0.0645 and 0.0729 μA μM cm⁻²), detection limit (0.02 μmol/L) and anti-interference stability can be achieved. The outstanding electrochemical behaviors may be ascribed to: 1) hydrogel matrix significantly improves the dispersion of MOF/COF composite materials and avoids its agglomeration; 2) there are abundant diffusion paths in the hydrogel nanocomposite; 3) the synergistic catalytic effect of MOF/COF and hydrogel. In short, the combination of this heterostructured MOF/COF composite materials and hydrogel soft materials will provide a valuable reference for the rapid detection of biomolecules.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112029"},"PeriodicalIF":12.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743579","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}

{"title":"Anisotropic structural carbon nanotube aerogels for piezoresistive strain sensors with multidirectional sensitivity","authors":"Dong Li ,&nbsp;Haomin Wang ,&nbsp;Zhaoyang Han ,&nbsp;Qianru Wu ,&nbsp;Xuan Lv ,&nbsp;Yingying Zhang ,&nbsp;Mengyu Wang ,&nbsp;Zhibo Li ,&nbsp;Maoshuai He","doi":"10.1016/j.compositesb.2024.112028","DOIUrl":"10.1016/j.compositesb.2024.112028","url":null,"abstract":"<div><div>Piezoresistive-type flexible strain sensors that accurately translate strain into resistance variation are gaining significant attention for their potential applications in healthcare, sports monitoring, and human-machine interfaces. However, most reported sensors can only respond to strain in specific directions. Multidirectional or even omnidirectional strain sensing is highly desirable but remains a challenge. In this work, we develop high-performance multidirectional piezoresistive strain sensors based on an anisotropic structural carbon nanotube aerogel (CNTA) infilled with polydimethylsiloxane (PDMS). The resulting CNTA/PDMS composites inherit the electrically conductive and deformation-sensitive network of the anisotropic CNTA, leading to high and anisotropic sensitivity to mechanical deformation. In the perpendicular microchannel direction, the gauge factor of CNTA/PDMS is as high as 30 upon 2 % compressive strain. These properties make the CNTA/PDMS composite a high-performance piezoresistive sensor for monitoring human body motion in a multidirectional sensing manner.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112028"},"PeriodicalIF":12.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743576","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}

{"title":"Inflammation-regulated and nutrient-supplied scaffolds promote bone regeneration in diabetic microenvironment in vivo","authors":"Zhaoyi Wang ,&nbsp;Qifeng Jiang ,&nbsp;Yue Xi ,&nbsp;Zhijian Yang ,&nbsp;Shifen Li ,&nbsp;Tong Zhou ,&nbsp;Shuqin Wang ,&nbsp;Guoli Yang ,&nbsp;Ying Wang ,&nbsp;Changyou Gao","doi":"10.1016/j.compositesb.2024.112003","DOIUrl":"10.1016/j.compositesb.2024.112003","url":null,"abstract":"<div><div>The harsh microenvironment of persistent inflammation and insufficient nutrient supply in diabetic organism impedes severely the osteogenic differentiation. Current management on diabetic microenvironment regulation has been focused on glycemic control and eliminating reactive oxygen species (ROS), which is inefficient to modulate the harsh diabetic microenvironment to promote bone regeneration. Herein, a surface-functionalized black phosphorus nanosheets (BPNSs)-coated ROS-scavenging scaffold was designed for the bone healing in type-2 diabetic rats by contributing to nutrient provision, osteogenesis, and anti-inflammation. The BPNSs/tannic acid (TA) were surface coated with cyclodextrin loaded with simvastatin (SIM)/4-carboxy-2-fluorobenzeneboronic acid (FPBA)-grafted hyperbranched poly-<span>l</span>-lysine (HBPL), which were further modified onto the pore walls of poly(lactide-co-glycolide) (PLGA) scaffold. The BPNSs gradually degraded to release phosphate, which served as an important component of bone, and together with the released SIM, synergistically promoted osteogenesis differentiation of MC3T3-E1 cells in a β-glycerophosphate-free medium. The TA and FPBA on the scaffold alleviated the inflammatory environment by ROS depletion and downregulating inflammatory factors, resulting in better bone regeneration in skull defects of diabetic rats <em>in vivo</em>. The remarkable outcomes <em>in vivo</em> verify that the scaffold containing functionalized BPNSs provides an effective strategy for diabetic bone regeneration.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112003"},"PeriodicalIF":12.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757121","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}

{"title":"Exploring properties and hydration mechanisms in clinker-free cement formulated from steel industry solid waste using the extreme vertices method","authors":"Jie Liu ,&nbsp;Jihui Zhao ,&nbsp;Jiankai Liang","doi":"10.1016/j.compositesb.2024.112018","DOIUrl":"10.1016/j.compositesb.2024.112018","url":null,"abstract":"<div><div>The development of clinker-free cementitious binders (CFCB) using industrial solid waste has attracted widespread attention due to their environmental and cost benefits. This study developed a CFCB using ground blast furnace slag (GBFS), steel slag (SS), and flue gas desulfurization gypsum (FGDG) as raw materials, utilizing an extreme vertex design method. The study systematically assessed the effects of each component on the CFCB's properties, hydration behavior, and microstructure, and based on these findings, further elucidated its hydration mechanism using thermodynamic simulations. Results indicated that FGDG played a critical role in regulating the fluidity of the fresh pastes and the compressive strength of the hardened pastes. GBFS enhanced the development of compressive strength, while the high-activity aluminates in SS enhanced the early-stage compressive strength. Thermodynamic simulations and experimental results confirmed that reactive aluminates and sulfates led to the formation of expansive hydration products AFt and AFm, with volume expansion peaking around 10 d. As the hydration reaction progressed, the number of aluminates participating in the reaction gradually increased, promoting the formation of C-A-S-H, hydrogarnet, and hydrotalcite, as well as the transformation of AFt into AFm. Comprehensive analysis suggested that within the GBFS–SS–FGDG system, the proportion of FGDG should not be less than 10 %, the content of GBFS should be controlled between 50 and 57.5 %, and the content of SS should not exceed 37.5 %. This study revealed the hydration mechanisms within the GBFS–SS–FGDG system, emphasizing the critical roles of each component.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112018"},"PeriodicalIF":12.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743577","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}

{"title":"Ultrastrong and ductile Al–Mg alloy matrix composites via composition-modulated precipitation induced by intragranular ceramic nanoparticles","authors":"Zhiqi Guo,&nbsp;Kang Wang,&nbsp;Bo Cui,&nbsp;Zhanqiu Tan,&nbsp;Lei Zhao,&nbsp;Genlian Fan,&nbsp;Zan Li,&nbsp;Zhiqiang Li,&nbsp;Di Zhang","doi":"10.1016/j.compositesb.2024.112012","DOIUrl":"10.1016/j.compositesb.2024.112012","url":null,"abstract":"<div><div>Nano-precipitation is critical in achieving high yield strength and strain hardening capacity in aluminum alloys and their composites, while Al–Mg alloys and their composites are generally believed not to be strengthened significantly by precipitations. This study reveals that a coherent composition-modulated precipitate χ deviated from the conventional precipitation sequence forms near intragranular ceramic nanoparticles (ICNPs) in Al–Mg alloy matrix composites, providing precipitation strengthening of ∼120 MPa and activating early plastic relaxation around ICNPs. Thus, an Al–5Mg alloy (wt.%) reinforced with 1.5 wt.% carbon nanotubes containing χ exhibits ultrahigh tensile yield strength of 653.2 MPa with uniform elongation of 8.9 %. χ is composed of alternating domains with different content of Mg and derives from disordering decomposition of metastable partially ordered δ'', as revealed by the first-principles calculations. This study subverts the understanding on the weak precipitation strengthening in Al–Mg alloys and their composites, and enlightens exploiting superior strength and ductility via ICNPs induced exotic precipitation strengthening.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112012"},"PeriodicalIF":12.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743647","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}

{"title":"Interlaminar fracture toughness and impact resistance of carbon fiber reinforced composite with magnetic aligned CNTs","authors":"Jin Lai,&nbsp;Yifeng Yu,&nbsp;Xiaoyu Zhang,&nbsp;Wei Qiang,&nbsp;Xin Zhang","doi":"10.1016/j.compositesb.2024.112008","DOIUrl":"10.1016/j.compositesb.2024.112008","url":null,"abstract":"<div><div>This study draws inspiration from Z-pins employed in fiber composites. Carbon fiber reinforced polymer (CFRP) laminates modified with Z-oriented carbon nanotubes (Z-CNTs) were fabricated utilizing a magnetic field orientation technique. The interlaminar fracture toughness, impact resistance and damage tolerance of CFRP modified with Z-CNTs were evaluated through end-notched flexure (ENF), low-velocity impact (LVI) tests, and compression after impact (CAI) testing. The enhancement mechanisms were investigated using multiscale techniques, including digital image correlation (DIC), scanning electron microscopy (SEM), molecular dynamics (MD), and finite element (FE) simulations. CFRP modified with 0.3 wt% CNTs showed optimum interlaminar fracture toughness, which improved by 62.9 % in CNT-random samples compared to non-modified samples and further enhanced by 95.2 % in CNT-oriented samples. The DIC and SEM analysis revealed the enhancement mechanism of Z-CNTs in fracture toughness, including (1) enlarging the toughness deformation of resin; (2) broadening the fracture process zone to dissipate the energy; and (3) shifting the failure mode of CNTs from pull-out dominance to fracture dominance. Furthermore, MD simulations showed that the crack propagation location significantly influences the different enhancement mechanisms exhibited by CNTs, which was accord with SEM observations. LVI and CAI tests indicated that specimens modified with Z-CNTs exhibit greater impact resistance and damage tolerance. FE simulation revealed that the mode II interlaminar fracture toughness plays a dominant role in the impact resistance of the laminate. These findings provide an effective strategy and theoretical supports for the design of impact resistance of composite laminates.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"291 ","pages":"Article 112008"},"PeriodicalIF":12.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757122","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}