IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-26 DOI: 10.1016/j.carbon.2024.119858

Tao Liu, Cheng Han, Shanshan Wang, Yucheng Ou, Xiaoshan Zhang, Songhe Zhang, Quzhi Song, Yiang Du, Fuwen Wang, Yingde Wang

{"title":"Embedding thermostable rGO/SiCxOy composite phase in SiC fibers for improved high temperature resistance","authors":"Tao Liu, Cheng Han, Shanshan Wang, Yucheng Ou, Xiaoshan Zhang, Songhe Zhang, Quzhi Song, Yiang Du, Fuwen Wang, Yingde Wang","doi":"10.1016/j.carbon.2024.119858","DOIUrl":"10.1016/j.carbon.2024.119858","url":null,"abstract":"<div><div>Silicon carbide (SiC) fibers exhibit exceptional potential in harsh environment applications such as aerospace and nuclear energy. However, the high temperature mechanical properties of SiC fibers are still limited by the unmanageable microstructure. Herein, we propose an amorphous phase stabilizing strategy by embedding thermostable reduced graphene oxide/silicon oxycarbide (rGO/SiC<sub><em>x</em></sub>O<sub><em>y</em></sub>) composite phase in SiC fibers via the polymer-derived ceramic (PDC) method. Homodisperse vinyl-bridged graphene oxide/polycarbosilane (PCS) precursor is designed to transform into rGO/SiC fibers, accompanied by the formation of a more stable rGO/SiC<sub><em>x</em></sub>O<sub><em>y</em></sub> composite structure that intersperses between SiC grains. Additionally, the rGO plays a role in suppressing the decomposition of SiC<sub><em>x</em></sub>O<sub><em>y</em></sub> and the rapid growth of SiC grains at elevated temperatures. As a result, the tensile strength of as-received 0.5%-rGO/SiC (2.64 GPa) and 1%-rGO/SiC (2.28 GPa) fibers are elevated by 40 % and 21 % respectively. Noteworthily, 1%-rGO/SiC fibers maintain a tensile strength of 0.57 GPa even after undergoing 1700 °C heat treatment, while the 0%-rGO/SiC fibers have nearly lost mechanical strength after annealing at 1600 °C. Consequently, the rGO exhibits significant potential for improving the high temperature resistance of ceramic fibers.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119858"},"PeriodicalIF":10.5,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723698","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

Modeling and mechanism of the mechanical interlocking for the carbon fiber/epoxy interphase

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-26 DOI: 10.1016/j.carbon.2024.119861

Zixi Li , Wenduo Chen , David Seveno , Dazhi Jiang

{"title":"Modeling and mechanism of the mechanical interlocking for the carbon fiber/epoxy interphase","authors":"Zixi Li , Wenduo Chen , David Seveno , Dazhi Jiang","doi":"10.1016/j.carbon.2024.119861","DOIUrl":"10.1016/j.carbon.2024.119861","url":null,"abstract":"<div><div>The intricate details governing the carbon fiber/epoxy interfacial characteristics at the molecular level have yet to be comprehensively unraveled. One of the reasons is that the effects of carbon fiber (CF) surface structures are oversimplified, leading to misconceptions regarding adhesion mechanisms. To advance knowledge of structure-property relationships, we employed molecular dynamics simulations to provide insights into the complexity of the CF surface and CF/epoxy interphase. A series of turbostratic surface models with different protrusion heights were built via crosslinking basic structural units inside hexagonal prism virtual energy walls to better model the physical and chemical features of a CF surface. Epoxy precursor and curing agent molecules were added and crosslinked to generate the CF/epoxy interphase models before loading the systems in tension and shear. It was found that the spatial variation of composition determines the longitudinal and transversal moduli distribution in the interphase. Moreover, higher protrusion increases the tensile strength and toughness in the transverse direction by transferring part of the tensile loading into the shear component. The mechanical interlocking between the polymer and the CF surface with microvoids and protrusions enhances both the interfacial shear strength and the effectiveness of load transmission.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119861"},"PeriodicalIF":10.5,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747233","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

Candle soot nanoparticles covered femtosecond laser-induced graphene toward multifunctional wooden houses

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-26 DOI: 10.1016/j.carbon.2024.119853

Haonan Yu , Kai Yin , Lingxiao Wang , Xinghao Song , Pengyu Yang , Tingni Wu , Yin Huang , Xun Li , Christopher J. Arnusch

{"title":"Candle soot nanoparticles covered femtosecond laser-induced graphene toward multifunctional wooden houses","authors":"Haonan Yu , Kai Yin , Lingxiao Wang , Xinghao Song , Pengyu Yang , Tingni Wu , Yin Huang , Xun Li , Christopher J. Arnusch","doi":"10.1016/j.carbon.2024.119853","DOIUrl":"10.1016/j.carbon.2024.119853","url":null,"abstract":"<div><div>Laser-induced graphene (LIG) is an innovative material that can be used in the construction of smart wood houses due to its high electrical and thermal conductivity. However, potential practical challenges such as fire hazards, and the complexity of daily cleaning are limitations in such an application. In this study, we utilized femtosecond laser direct writing technology to create femtosecond laser-induced graphene (FLIG) on flame retardant cork. The FLIG surface was then coated with multi-scale candle soot particles to incorporate carbon black (CB-FLIG) superhydrophobic surface properties. Here we demonstrate CB-FLIG as a raw material for electronic components in multifunctional wooden houses. The infrared emissivity of the CB-FLIG surface was as high as 97.2 % and the electric heating performance was good. As such, it can be used as an electric heater in the winter, and we achieved room temperature control at a comfortable 24.9 °C with 4 V voltage in a model house. Also, the water contact angle was 151.2°, giving CB-FLIG self-cleaning properties. Ultimately, we demonstrate the application of CB-FLIG in the field of smart home components such as electrical wiring, electric heaters, fire protection, and self-cleaning, increasing functionality while reducing the need for routine maintenance. This study lays a robust foundation for state-of-the-art devices within smart timber houses and significantly propels the development of versatile, interconnected wooden dwellings.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119853"},"PeriodicalIF":10.5,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747234","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

Facile fabrication of lightweight and three-dimensional porous Dy2O3 decorated single-walled carbon nanotubes/reduced graphene oxide composite aerogels for broadband microwave absorption

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-25 DOI: 10.1016/j.carbon.2024.119860

Xuejiao Liu, Qi Wang, Jian Cui, Yehai Yan

{"title":"Facile fabrication of lightweight and three-dimensional porous Dy2O3 decorated single-walled carbon nanotubes/reduced graphene oxide composite aerogels for broadband microwave absorption","authors":"Xuejiao Liu, Qi Wang, Jian Cui, Yehai Yan","doi":"10.1016/j.carbon.2024.119860","DOIUrl":"10.1016/j.carbon.2024.119860","url":null,"abstract":"<div><div>Reduced graphene oxide aerogel (GA) has emerged as a promising microwave absorbing (MA) material. However, it remains a challenge for pure GA to achieve excellent MA performance owing to the limitation of loss model and impedance mismatching. Herein, a 0D@1D/2D construction of Dy<sub>2</sub>O<sub>3</sub> decorated single-walled carbon nanotubes/reduced graphene oxide (Dy<sub>2</sub>O<sub>3</sub>@SWCNT/rGO) composite aerogel (DCGA) with high-performance electromagnetic wave (EMW) absorption was successfully obtained using a simple reduction self-assembly process. The DCGA features a distinctive 3D porous network formed by the stacking of lamellar rGO and has a low bulk density. As expected, the microwave attenuation performance of the DCGA exhibits a level of tunability that can be achieved by varying the mass ratio of GO along with Dy<sub>2</sub>O<sub>3</sub>@SWCNT. Benefiting from synergistic effect, the resulted ultralight DCGA-3 (4.6 mg/cm<sup>−3</sup>) exhibits a strong reflection loss (RL) of −57.6 dB (3 mm) at 13 GHz and a low filler loading ratio of ca. 1.4 wt%. Further, the maximal effective absorption bandwidth (EAB) (RL < −10 dB) of DCGA-1 can reach 7.8 GHz (10.2–18 GHz) with a thickness of 2.8 mm. Notably, the EAB of DCGA can completely cover X band and Ku band by adjusting the thickness. The excellent EMW absorbing ability was originated from the combined influence of optimized impedance matching, a distinctive multidimensional porous structure, a leaf-like conductive network and the presence of numerous defects and interfaces. Consequently, this research may aid in the development of graphene-infused hybrid composites featuring a 3D porous architecture, serving as lightweight and efficient absorbers of EMWs.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119860"},"PeriodicalIF":10.5,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757082","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 enhancement of structure and function in carbonaceous SiC aerogels for improved microwave absorption 协同增强碳质碳化硅气凝胶的结构和功能以提高微波吸收能力

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-23 DOI: 10.1016/j.carbon.2024.119854

Fuhao Xu , Yixian Wang , Fangchen Tang , Xiaolei Dai , Zhiyang Zhao , Yong Kong , Xiaodong Shen , Gaofeng Shao

{"title":"Synergistic enhancement of structure and function in carbonaceous SiC aerogels for improved microwave absorption","authors":"Fuhao Xu , Yixian Wang , Fangchen Tang , Xiaolei Dai , Zhiyang Zhao , Yong Kong , Xiaodong Shen , Gaofeng Shao","doi":"10.1016/j.carbon.2024.119854","DOIUrl":"10.1016/j.carbon.2024.119854","url":null,"abstract":"<div><div>As space science and technology rapidly advance, spacecraft are increasingly subjected to severe thermal and electromagnetic environments. This has created an urgent demand for materials that offer both microwave absorption and thermal insulation. Herein, we present one-dimensional (1D) carbon nanotube (CNT)/SiC nanostructure-reinforced SiC-based aerogels via carbothermal reduction of resorcinol-formaldehyde/silica composite aerogels containing CNTs. These composite aerogels were presynthesized using a straightforward one-pot sol-gel method, subsequently undergoing supercritical CO<sub>2</sub> drying. Conduction loss and mechanical strength are both simultaneously improved by the in-situ formation of 1D CNT@SiC core-shell nanostructures within granular SiC aerogels. The optimized SiC-based aerogel demonstrates exceptional performance, achieving a minimum reflection loss of −66.01 dB and the effective absorption bandwidth reaching 6.76 GHz. Additionally, it maintains a thermal conductivity of 0.0582 W/(m·K) at 25 °C, alongside a Young's modulus of 45.2 MPa at a density of 0.242 g/cm<sup>3</sup>. This design seamlessly combines various functionalities within the SiC-based aerogel system, offering significant guidance towards the development of cutting-edge functional aerogels designed to withstand extreme environmental challenges.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119854"},"PeriodicalIF":10.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702316","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

Combustion synthesis of SiC/graphene nanocomposites with strong microwave absorption

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-23 DOI: 10.1016/j.carbon.2024.119849

Bohan Wang , Fei Li , Shuo Zhao , Binbin Fan , Dengke Zhao , Shijia Zhang , Yiyao Ge , Jie Zhang , Wenbin Cao , Kexin Chen , Guanghua Liu

{"title":"Combustion synthesis of SiC/graphene nanocomposites with strong microwave absorption","authors":"Bohan Wang , Fei Li , Shuo Zhao , Binbin Fan , Dengke Zhao , Shijia Zhang , Yiyao Ge , Jie Zhang , Wenbin Cao , Kexin Chen , Guanghua Liu","doi":"10.1016/j.carbon.2024.119849","DOIUrl":"10.1016/j.carbon.2024.119849","url":null,"abstract":"<div><div>Economical and green preparation of SiC composites with tunable microwave-absorbing properties is crucial for industrial applications. In this study, SiC/graphene nanocomposites were synthesized via combustion synthesis technology by using CO<sub>2</sub>, a greenhouse gas, as the carbon source. The phase composition, microstructure and microwave-absorbing performance of the SiC/graphene nanocomposites were characterized. Dielectric properties and impedance matching can be precisely controlled simultaneously by changing the composition of the SiC/graphene nanocomposites. The characteristic microstructure of the SiC/graphene nanocomposites with networks of multilayer graphene sheets has a significant contribution to the improved microwave attenuation capability. The SiC/graphene nanocomposite sample with optimized composition and microstructure showed excellent microwave-absorbing performance, with a reflection loss (RL) of −63.94 dB at 6.15 GHz, and effective absorption bandwidth (EAB) of 4.05 GHz for RL < −10 dB. The SiC/graphene nanocomposites with strong microwave absorption have great potential for applications prospects in various fields.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119849"},"PeriodicalIF":10.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747349","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

WS2/WN interface-triggered energetic triiodide reduction activity to enhance performance of solar cells

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-23 DOI: 10.1016/j.carbon.2024.119855

Jixin Yao , Liang Li , Xiaowei Tong , Xianwei Jiang , Shibing Lu , Ying Meng , Dongmeng Chen , Feng Du , Haifeng Xu , Guang Li

{"title":"WS2/WN interface-triggered energetic triiodide reduction activity to enhance performance of solar cells","authors":"Jixin Yao , Liang Li , Xiaowei Tong , Xianwei Jiang , Shibing Lu , Ying Meng , Dongmeng Chen , Feng Du , Haifeng Xu , Guang Li","doi":"10.1016/j.carbon.2024.119855","DOIUrl":"10.1016/j.carbon.2024.119855","url":null,"abstract":"<div><div>The sluggish triiodide reduction activity poses a significant challenge that hinders the acquisition of high efficiency in dye-sensitized solar cells (DSSCs). Herein, a one-step thermal reduction strategy is adopted to in situ construct a two-dimensional layered WS<sub>2</sub>/WN heterostructure and couple it onto N-doped carbon spheres (labeled as WS<sub>2</sub>/WN-NC). The constructed DSSC with WS<sub>2</sub>/WN-NC counter electrode (CE) reaches as high as power conversion efficiency (PCE) of 9.52 %, surpassing that of pure Pt (8.33 %). Theoretical calculations combined with X-ray photoelectron spectroscopy (XPS) analysis reveal that electrons can easily induce the transfer of electrons from WS<sub>2</sub> to WN and regulate the charge states of WS<sub>2</sub> and WN, concentrating abundant electrons at the WS<sub>2</sub>/WN interface, which is conducive to inhibiting the coupling of iodide ions. Electron microscopy reveals that the layered WS<sub>2</sub>/WN adheres to the N-doped carbon spheres, which can prevent stacking and thereby accelerate the electron transport rate. Additionally, due to the supporting role of the carbon spheres, the WS<sub>2</sub>/WN active substances can be fully utilized, thereby enhancing the triiodide catalytic activity. Therefore, the structure-activity relationship between the two can complement and enhance each other, thereby optimizing the DSSC reaction kinetics and enhancing the photoelectric conversion efficiency and stability.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119855"},"PeriodicalIF":10.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747350","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

High-performance carbonaceous absorbers: From heterogeneous absorbents to data-driven metamaterials

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-23 DOI: 10.1016/j.carbon.2024.119850

Diana Estevez , Faxiang Qin

{"title":"High-performance carbonaceous absorbers: From heterogeneous absorbents to data-driven metamaterials","authors":"Diana Estevez , Faxiang Qin","doi":"10.1016/j.carbon.2024.119850","DOIUrl":"10.1016/j.carbon.2024.119850","url":null,"abstract":"<div><div>Carbon-based materials are a key focus in the advancement of “on-demand” microwave absorbers due to their adjustable electrical conductivity and structure, as well as the presence of surface functional groups and defects that promote various loss mechanisms. Bottom-up strategies to optimize the carbon absorbent phase rely primarily on component hybridization, atomic doping, interface engineering, and the construction of hierarchical structures. However, while these strategies constitute important advancements, they do not extend beyond laboratory settings and remain restricted in scope. Compared to a composite absorber incorporating carbon inclusions within a matrix, greater flexibility in design and property control is achieved, as its adoption has triggered effective medium and homogenization theories for assessing structure-property relations. Metamaterial absorbers are rationally designed composites, resulting from meticulous adjustments in microarchitecture that have recently been accelerated by artificial intelligence (AI)-based algorithms replacing conventional trial-and-error and experimental-based strategies for optimization. These emerging technological routes could also be exploited to add multifunctionality to carbon composite absorbers in actual service environments and to develop the next generation of smart absorbers. This article presents an overview of the achievements, trends, and challenges in these areas from the perspective of composite structures rather than focusing on the individual absorbent phase, a subject that is currently underrepresented in existing literature.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119850"},"PeriodicalIF":10.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747347","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

Stretch-induced tunability of electrical transport properties of three-dimensional graphene-based foam structures

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-23 DOI: 10.1016/j.carbon.2024.119832

Shu-Ting Guo, Fangxin Zou

{"title":"Stretch-induced tunability of electrical transport properties of three-dimensional graphene-based foam structures","authors":"Shu-Ting Guo, Fangxin Zou","doi":"10.1016/j.carbon.2024.119832","DOIUrl":"10.1016/j.carbon.2024.119832","url":null,"abstract":"<div><div>The fast electron transport and superior multidirectional flexibility of three-dimensional graphene-based foams (GFs) are pivotal in the realm of stretchable electronics. We observed pre-stretching induced modulation of the temperature-dependent electrical resistivity of GFs, where, as the pre-stretch strain level increased, the distinct temperature dependence of the resistivity of a GF sample would change and might even exhibit a notable transition from negative dependence to positive dependence. We attempted to interpret the phenomenon by proposing a new conduction network model that represents GF structures as interconnected polycrystalline graphene islands and island/island conduction junctions and incorporates three conduction mechanisms: thermally activated conduction across grain boundaries and phonon-limited conduction avoiding grain boundaries within a graphene island, and fluctuation-induced tunneling conduction across island/island conduction junctions. By fitting-assisted analysis, we found that the temperature dependence of the resistivity of a GF sample primarily relies on the discrete quantities of graphene islands and island/island conduction junctions, and the resistivity originating from each conduction mechanism. As pre-stretch strain level increases, these factors would change due to conduction network alteration, local strain-induced phonon hardening, and local strain-induced transport gap modulation, all resulting from pre-stretching. Our results offer valuable insights into the optimization of GFs-based stretchable electronic devices, such as performance enhancement through structural modifications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119832"},"PeriodicalIF":10.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747232","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

Reasonable design of supramolecular carbon dots with needle-like structures and regulation of tribological properties

IF 10.5 2区材料科学

Carbon Pub Date : 2024-11-23 DOI: 10.1016/j.carbon.2024.119829

Pai Yu, Chenchen Wang, Hualin Lin, Sheng Han, Yuze Mao

{"title":"Reasonable design of supramolecular carbon dots with needle-like structures and regulation of tribological properties","authors":"Pai Yu, Chenchen Wang, Hualin Lin, Sheng Han, Yuze Mao","doi":"10.1016/j.carbon.2024.119829","DOIUrl":"10.1016/j.carbon.2024.119829","url":null,"abstract":"<div><div>The investigation of nanocrystal self-assembly into superlattices or superstructures stands as a crucial endeavor within the realm of nanoscience. Carbon dots, emerging as a novel class of nanomaterials, exhibit broad potential across multifaceted fields. However, despite their burgeoning applications, the exploration of their self-assembly behavior remains relatively sparse, particularly in the frictional phenomena. Herein, a unique acicular aggregate of carbonized polymer dots (CPDs) was synthesized through the reflux of long alkyl chains in chlorobenzene, with a distinctive needle-like structure. As a lubricant additive, the tribological test results presented that a notable decrease of 26.4 % in the coefficient of friction (COF) and 78.6 % in the wear scar diameter (WSD) of PAO. Furthermore, through the computational methodologies calculating the friction chemistry and lubrication state of the wear surface, the lubrication mechanism was revealed that formation of a thicker oil film between the friction pairs, thereby mitigating wear loss. This study provides a novel insight for the application of supramolecular carbonized polymer points in the friction-related applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119829"},"PeriodicalIF":10.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757084","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

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