IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-25 DOI: 10.1016/j.carbon.2025.120866

Yanbin Zhang, Jian Wei, Xueting Li, Jiayi Hou, Zhuang Miao, Peng Wang, Yi Yao, Enhao Lv

{"title":"Ultra-high hardness and enhanced toughness of lightweight high-purity B4C ceramics with impact-resistance via Ketjen Black additive","authors":"Yanbin Zhang, Jian Wei, Xueting Li, Jiayi Hou, Zhuang Miao, Peng Wang, Yi Yao, Enhao Lv","doi":"10.1016/j.carbon.2025.120866","DOIUrl":"10.1016/j.carbon.2025.120866","url":null,"abstract":"<div><div>In the field of high-performance ceramic materials, boron carbide (B<sub>4</sub>C) is regarded as an ideal choice for protective armor and military applications due to its exceptional hardness, wear resistance, and lowest density. Nevertheless, the difficulty in sintering B<sub>4</sub>C, along with the trade-off between hardness and toughness, greatly limits its applications. To improve the performance of B<sub>4</sub>C ceramics, this study utilizes Ketjen black (KB) with ultrahigh conductivity and specific surface area as an additive. The KB-derived conductive network enhances spark plasma sintering (SPS) efficiency while maintaining the ultrahigh hardness and lightweight nature of high-purity B<sub>4</sub>C ceramics. Experimental results demonstrate that the resulting B<sub>4</sub>C ceramics contain only a small amount of residual carbon, without forming any secondary phases. Notably, with the addition of 4 wt% KB, the ceramic density remains at a low level of 2.48 g/cm<sup>3</sup>, while the mechanical properties show significant improvement. The Vickers hardness reaches 36.81 GPa, and the fracture toughness is 4.05 MPa·m<sup>1/2</sup>. These combined properties represent one of the best performance levels currently achieved in high-purity B<sub>4</sub>C ceramics. Additionally, the improved sintering performance enables the KB/B<sub>4</sub>C ceramic to fully manifest its superior impact-resistance and anti-fragmentation capabilities. These findings provide valuable insights for the preparation and application of lightweight, high-performance B<sub>4</sub>C ceramics.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120866"},"PeriodicalIF":11.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic on-demand lubrication and corrosion inhibition: A pH/mechanical dual responsive MXene/MIL-100(Fe)-based epoxy coating for long-term tribocorrosion protection 协同按需润滑和缓蚀：一种pH/机械双响应MXene/MIL-100（Fe）基环氧涂层，用于长期摩擦腐蚀保护

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-25 DOI: 10.1016/j.carbon.2025.120889

Han Yan, Changyou Wang, Bo Ling, Leifeng Shi, Bo Hu, Dezhi Zeng, Lin Zhang

{"title":"Synergistic on-demand lubrication and corrosion inhibition: A pH/mechanical dual responsive MXene/MIL-100(Fe)-based epoxy coating for long-term tribocorrosion protection","authors":"Han Yan, Changyou Wang, Bo Ling, Leifeng Shi, Bo Hu, Dezhi Zeng, Lin Zhang","doi":"10.1016/j.carbon.2025.120889","DOIUrl":"10.1016/j.carbon.2025.120889","url":null,"abstract":"<div><div>Critical moving components frequently encounter significant tribocorrosion challenges during service. Nevertheless, conventional protective coatings typically perform inadequately under wear-corrosion coupling conditions, exhibiting rapid degradation and concealed failure. Here, a high-performance filler (AR-FM) is synthesized by <em>in-situ</em> growth of MIL-100(Fe) nanocontainers on 2D transition metal carbides Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanosheets, with the simultaneously encapsulating 5-amino-1,3,4-thiadiazole-2-thiol (AMT) and Rhodamine B (RhB). Subsequently, AR-FM is incorporated into an epoxy matrix to fabricate a smart protective coating (FMP). The tribocorrosion resistance of FMP with pH/mechanical dual-stimulus response and the relevant protective mechanisms are investigated through the combined use of experiments and molecular dynamics simulations. Under the tribocorrosion conditions, the wear rate of FMP (8.29 × 10<sup>−6</sup> mm<sup>3</sup>/N·m) is one order of magnitude lower than that of the epoxy coating (EP), and its open-circuit potential remains a high level with minimal fluctuations (ΔV<sub>OCP</sub> < 0.005 V). When exposed to corrosive conditions, the complexation of released RhB with Fe<sup>3+</sup> causes fluorescence quenching for self-warning, while the released AMT forms a passivation film at the damaged site, leading to the self-healing efficiency of 99.9 ± 0.05 %. The excellent tribocorrosion resistance is attributed to the synergistic effect of enduring MXene-based lubricating film, enhanced deformation resistance, strong interfacial bond strength, and efficient corrosion resistance with dual pH/mechanical stimulus response.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120889"},"PeriodicalIF":11.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dramatic integrated enhancement of electromagnetic wave absorption and delamination resistance via 3D interlayer network architecture in composites 复合材料三维层间网络结构对电磁波吸收和抗脱层性能的显著集成增强

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-25 DOI: 10.1016/j.carbon.2025.120872

Xiaomei Du, Yaqing Liu, Xiaogang Su, Chaobo Liang, Shaoliang Huang, Kai Wen, Qihui Chen, Guizhe Zhao

{"title":"Dramatic integrated enhancement of electromagnetic wave absorption and delamination resistance via 3D interlayer network architecture in composites","authors":"Xiaomei Du, Yaqing Liu, Xiaogang Su, Chaobo Liang, Shaoliang Huang, Kai Wen, Qihui Chen, Guizhe Zhao","doi":"10.1016/j.carbon.2025.120872","DOIUrl":"10.1016/j.carbon.2025.120872","url":null,"abstract":"<div><div>The key technical challenge for electromagnetic wave (EMW) absorbing materials in engineering applications is the integrated optimization of EMW absorption and mechanical properties, which directly impacts composite reliability and multifunctional integration in complex environments. In this paper, the graphene oxide (GO)/carboxymethyl cellulose sodium (CMC) aerogel (GCA) with a 3D network structure is incorporated into carbon fiber cloth (CFC) interlayers, and a multi-scale collaborative strategy is proposed for preparing carbon fiber/epoxy composites (CFC/GCA/EP) that possess EMW absorption and delamination resistance properties. The low dielectric properties of GO improve the impedance matching of CFC/GCA/EP, while the 3D network structure increases the interfacial polarization and EMW transmission paths. This is synergistic with the excellent conductive loss of CFC, allowing CFC/GCA/EP-3 to exhibit excellent EMW absorption with a broadband bandwidth of 8.92 GHz and reflection loss of −19.59 dB at a thickness of 2 mm. In addition, GO sheets also improve interlaminar toughness and impact resistance by enhancing fiber-resin adhesion, dispersing stress, deflecting cracks, and increasing fracture area. CFC/GCA/EP-3, which has the best absorption performance, shows increases of 11.16 % and 32.56 % respectively in the Type I and Type II critical strain energy release rates compared to CFC/EP, along with a 21.36 % increase in peak impact force. The combination of EMW absorption performance and mechanical properties offers a new approach to the preparation of structurally and functionally integrated composites.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120872"},"PeriodicalIF":11.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation and manipulation of grain boundary corrugations in polycrystalline graphene supported by van der Waals and metallic substrates 由范德华和金属衬底支撑的多晶石墨烯中晶界波纹的观察和操纵

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-25 DOI: 10.1016/j.carbon.2025.120890

Xueyan Li , Jiaqi Yang , Yuang Li, Yi Pan

{"title":"Observation and manipulation of grain boundary corrugations in polycrystalline graphene supported by van der Waals and metallic substrates","authors":"Xueyan Li , Jiaqi Yang , Yuang Li, Yi Pan","doi":"10.1016/j.carbon.2025.120890","DOIUrl":"10.1016/j.carbon.2025.120890","url":null,"abstract":"<div><div>The nanoscale corrugations, which endow atomically thin two-dimensional materials with unique physical and chemical properties, universally exist in the grain boundary (GB) of polycrystalline graphene, but their structural tunability and the influence of substrate interaction require further investigation. Here, we report the atomically resolved scanning tunneling microscope (STM) observation and manipulation of GB corrugations in polycrystalline graphene with different substrate interactions. On the van der Waals (vdW) substrate graphite, the structure of the GB corrugation is dominated by intralayer interaction arising from the misorientation between neighboring grains. It evolves from periodic bubble-like corrugations to continuous wrinkles as the misorientation angle increases. The buckling polarity of the surface and subsurface bubble-like GB corrugations on vdW substrates can be reversibly manipulated by applying an electric field through the STM tip. While on the metallic substrate Pt(111), the GB wrinkles show asymmetric cross-sectional profiles due to combined intralayer interactions from neighboring grains and interlayer interactions from the substrate. The metallic substrate also provides the pinning effect prohibiting the buckling polarity manipulation. Additionally, an asymmetric strain distribution mechanism was proposed to explain the influence of the key factors. These findings shed light on the strain engineering of graphene corrugations, which might find applications in electronic devices.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120890"},"PeriodicalIF":11.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbon composites for electromagnetic interference shielding: Progress, challenges and perspective 电磁干扰屏蔽用碳复合材料：进展、挑战与展望

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-24 DOI: 10.1016/j.carbon.2025.120874

Govind Kumar Sharma , Raji S , Reshna Suresh , Mohammed Rahees , Srikanth Pilla , Nirmala Rachel James , K. Prabhakaran

{"title":"Carbon composites for electromagnetic interference shielding: Progress, challenges and perspective","authors":"Govind Kumar Sharma , Raji S , Reshna Suresh , Mohammed Rahees , Srikanth Pilla , Nirmala Rachel James , K. Prabhakaran","doi":"10.1016/j.carbon.2025.120874","DOIUrl":"10.1016/j.carbon.2025.120874","url":null,"abstract":"<div><div>The exponential growth of electronic devices, satellite technology, and wireless communication has significantly increased electromagnetic (EM) pollution, leading to widespread electromagnetic interference (EMI). Therefore, there is an urgent need for high-performance, environmentally friendly EMI shielding materials to protect both electronic systems and human well-being. This article highlights the importance of developing high-performance EMI shielding materials through intelligent micro- and nano-structural engineering and careful compositional tuning, with a focus on the innovative strategies enabled by carbon composites. It provides an in-depth discussion of the preparation methods for carbon foams and carbon fiber composites aiming to achieve high EMI shielding performance. This article aims to provide valuable insights and inspiration to researchers in related fields, promoting the collective advancement of research and practical applications of carbon composites for EMI shielding across a broad frequency range. The multifunctionality of carbon composites such as carbon foams and carbon fiber composites has strong potential in the field of aerospace, electronics, defense, and stealth technologies due to their high electrical conductivity, lightweight nature, heat dissipation ability, fire resistance, moisture insensitivity, and tunable mechanical properties.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120874"},"PeriodicalIF":11.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional electrospinning and catalytic graphitization directly prepared high flexibility, elasticity and graphitization interwoven crimp micro/nano-carbon-fibrous aerogels 三维静电纺丝和催化石墨化直接制备了高柔韧性、弹性和石墨化卷曲交织的微/纳米碳纤维气凝胶

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-24 DOI: 10.1016/j.carbon.2025.120871

Weiting Tian, Jingwen Tang, Minghui Zhang, Ming Chang, Xiaoyan Chen, Jiangman Sun, Kai Pan

{"title":"Three-dimensional electrospinning and catalytic graphitization directly prepared high flexibility, elasticity and graphitization interwoven crimp micro/nano-carbon-fibrous aerogels","authors":"Weiting Tian, Jingwen Tang, Minghui Zhang, Ming Chang, Xiaoyan Chen, Jiangman Sun, Kai Pan","doi":"10.1016/j.carbon.2025.120871","DOIUrl":"10.1016/j.carbon.2025.120871","url":null,"abstract":"<div><div>This study presents a effective approach for fabricating highly graphitized, flexible micro/nano-carbon-fibrous aerogels (MNCFAs) using an integrated sol humidity-regulated electrospinning technique combined with an iron-catalyzed graphitization. Through coordinating polyacrylonitrile (PAN) with Fe<sup>3+</sup> ions, a template-free, one-step 3D electrospinning process to directly produce self-supporting PAN aerogel precursors is achieved. After pre-oxidation and iron-catalyzed carbonization, the MNCFAs exhibit remarkable properties, including an ultra-low density of about 8.0–15.9 mg cm<sup>−3</sup>, superior flexibility, superelasticity retaining 87 % stress after 1000 cycles, excellent thermal insulation with a conductivity of about 0.039 W m<sup>−1</sup> K<sup>−1</sup>, and outstanding electrical conductivity exceeding 1.42 S cm<sup>−1</sup>. Importantly, the iron catalyst enables high graphitization at a moderate temperature of 1200 °C, overcoming the low conductivity typical of electrospun carbon aerogels. The MNCFAs also demonstrate a stable piezoresistive response with high sensitivity over a wide operational range from −196 °C to 300 °C, 163.5 kPa<sup>−1</sup> at low pressure and 83.2 kPa<sup>−1</sup> at high pressure, making them ideal for flexible piezoresistive sensors. This synthesis method enhances production efficiency and opens new possibilities for designing multifunctional aerogels for next-generation intelligent robotics and extreme-environment sensing applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120871"},"PeriodicalIF":11.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbon nitride incorporated nanoporous carbon nanoarchitectonics derived from Victorian brown coal for supercapacitor and oxygen reduction reaction 从维多利亚褐煤中提取的纳米多孔碳纳米结构用于超级电容器和氧还原反应

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-24 DOI: 10.1016/j.carbon.2025.120857

Nithya S. George , Rohan Bahadur , Mohammed Fawaz , Sara Tahery , Paul Munroe , Arun Aravind , D. Sajan , Gurwinder Singh , Ajayan Vinu

{"title":"Carbon nitride incorporated nanoporous carbon nanoarchitectonics derived from Victorian brown coal for supercapacitor and oxygen reduction reaction","authors":"Nithya S. George , Rohan Bahadur , Mohammed Fawaz , Sara Tahery , Paul Munroe , Arun Aravind , D. Sajan , Gurwinder Singh , Ajayan Vinu","doi":"10.1016/j.carbon.2025.120857","DOIUrl":"10.1016/j.carbon.2025.120857","url":null,"abstract":"<div><div>Nanoporous carbon is a highly promising material for energy storage and conversion due to its high specific surface area, large pore volume, and tunable porosity. Herein, we report carbon nitride (CN) incorporated nanoporous carbon derived from largely available and low-cost Victorian brown coal through the KOH solid-state activation followed by the carbonization of aminoguanidine at low temperatures under inert conditions. The prepared materials have high specific surface areas (>3100 m<sup>2</sup> g<sup>-1</sup>), large pore volumes (>1.7 cm<sup>3</sup> g<sup>-1</sup>), and a hierarchical nanoporous structure. At a current density of 0.5 A g<sup>−1</sup>, the optimized material exhibited a high specific capacitance of 226.5 F g<sup>-1</sup>. The symmetric supercapacitor device demonstrated an energy density of 18 Wh kg<sup>−1</sup> at a power density of 582 Wkg<sup>-1</sup>. Furthermore, a quasi-solid KOH/PVA gel-based supercapacitor exhibited a specific capacitance of 119.3 F g<sup>-1</sup> at 0.1 A g<sup>-1</sup>. The AG10 material also demonstrated an excellent limiting current density of 5.31 mA cm<sup>−2</sup> at 0.2 V in the oxygen reduction reaction, significantly higher than the nanoporous carbon without CN (0.94 mA cm<sup>−2</sup>). While the nanoporous carbon plays a key role in ion transfer and providing electrical conductivity, CN is beneficial for providing abundant electrochemical active sites for improving capacitive and catalytic performance. The work demonstrates the advantage of optimal incorporation of CN in imparting N functionalities while retaining high surface area and porosity for improved energy storage and oxygen reduction reaction performance.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120857"},"PeriodicalIF":11.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hollow carbon nanoboxes with FeSe2/CoSe2 heterojunctions via MOF-on-MOF engineering for efficient energy conversion 通过MOF-on-MOF工程实现FeSe2/CoSe2异质结的空心碳纳米盒高效能量转换

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-24 DOI: 10.1016/j.carbon.2025.120858

Tianxiang Yang , Qing Pang , Guangping Yang , Ruoming Wang , Jiaoe Dang , Haijiang Yang , Zhiguo Wang , Rou Feng , Asim Arshad , Xiaorong Xu , Sining Yun

{"title":"Hollow carbon nanoboxes with FeSe2/CoSe2 heterojunctions via MOF-on-MOF engineering for efficient energy conversion","authors":"Tianxiang Yang , Qing Pang , Guangping Yang , Ruoming Wang , Jiaoe Dang , Haijiang Yang , Zhiguo Wang , Rou Feng , Asim Arshad , Xiaorong Xu , Sining Yun","doi":"10.1016/j.carbon.2025.120858","DOIUrl":"10.1016/j.carbon.2025.120858","url":null,"abstract":"<div><div>The simultaneous optimization of electronic structure and nanoscale architecture to boost interfacial electron transfer and tune active site electronic configuration remains pivotal for advancing high-efficiency carbon-based electrocatalysts. Herein, we propose a MOF-on-MOF interface engineering strategy to engineer 3D nitrogen-modified carbon nanoboxes embedded with FeSe<sub>2</sub>/CoSe<sub>2</sub> heterostructures (FeSe<sub>2</sub>/CoSe<sub>2</sub>@NMCN). The hierarchical architecture integrates hollow morphology with multi-level porosity, establishing efficient charge transport pathways. Crucially, heterointerface-induced built-in electric fields modulate d-band centers through interfacial charge redistribution, achieving optimized adsorption energy of the catalytic reaction intermediates. FeSe<sub>2</sub>/CoSe<sub>2</sub>@NMCN loaded on a nickel foam electrode demonstrates exceptional hydrogen evolution reaction (HER) performance with ultra-low overpotentials of 96 mV (10 mA cm<sup>−2</sup>) and 198 mV (100 mA cm<sup>−2</sup>). Assembled photovoltaic devices achieve remarkable 8.14 % (AM 1.5G) and 16.80 % (3000 lux indoor) power conversion efficiencies during triiodide reduction reaction (IRR). Density functional theory (DFT) calculations further revealed strong electronic interactions at the FeSe<sub>2</sub>/CoSe<sub>2</sub> heterointerface following optimization of the electronic structure of the catalyst, which can enhance adsorption capacities for reaction intermediates. This work establishes a morphology-electronic dual-regulation strategy through heterostructure and nano-confinement effects, providing data and theoretical support into novel catalyst design for sustainable energy systems.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120858"},"PeriodicalIF":11.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amino-ionic liquid functionalized graphene: A dual-purpose additive for lubrication and electrical erosion resistance 氨基离子液体功能化石墨烯：具有润滑和耐电侵蚀双重用途的添加剂

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-24 DOI: 10.1016/j.carbon.2025.120868

Bo Dai , Qian Jia , Bingbing Lai , Xiaoyu Wang , Lizan Wang , Haichao Liu , Wenjing Lou , Xiaobo Wang

{"title":"Amino-ionic liquid functionalized graphene: A dual-purpose additive for lubrication and electrical erosion resistance","authors":"Bo Dai , Qian Jia , Bingbing Lai , Xiaoyu Wang , Lizan Wang , Haichao Liu , Wenjing Lou , Xiaobo Wang","doi":"10.1016/j.carbon.2025.120868","DOIUrl":"10.1016/j.carbon.2025.120868","url":null,"abstract":"<div><div>To address electrical erosion in rolling bearings of the motor systems of electrical vehicles, this study presents an in situ functionalization of graphene oxide (GO) with an amino-functionalized ionic liquid, [Bmim]PF<sub>6</sub>, resulting in a reduced graphene oxide–ionic liquid composite (rGOIL) with excellent electrical conductivity and outstanding friction-reducing and anti-wear performances. A series of conductive urea-based greases are formulated by optimizing the rGOIL content. The structure and morphology of rGOIL are characterized by FTIR, XRD, Raman spectroscopy, SEM, TEM, and XPS. Tribological tests using an SRV tribometer and electrical erosion evaluation on a bearing test rig show that grease containing 0.5 wt% rGOIL maintains a low and stable friction coefficient (0.102) under a 200 N load at 50 °C, with a 93 % reduction in wear volume compared to conventional polyurea grease. In electrical erosion tests, the bearing vibration amplitude stabilizes at 1.1 mm/s<sup>2</sup>, only 15 % of that measured for the reference grease. XPS and TEM analyses reveal the formation of a tribochemical film consisting of graphene nanosheets, ionically bonded liquid layers, and metal fluorides and phosphates. This film forms a conductive lubrication layer through a synergistic \"lubrication–conductivity–lubrication\" mechanism, effectively mitigating electrical erosion and enhancing bearing durability.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120868"},"PeriodicalIF":11.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and fabrication of multiscale hierarchical structures of carbon-fiber-reinforced composites with ultrahigh specific damping performance 超高比阻尼碳纤维增强复合材料多尺度分层结构的设计与制造

IF 11.6 2区材料科学

Carbon Pub Date : 2025-09-24 DOI: 10.1016/j.carbon.2025.120873

Yuqin Zeng, Haibo Feng, Ling Ling, Li Li

引用次数: 0

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