Fabrics have attracted significant attention in the field of electromagnetic shielding due to their unique grid structure,high electrical conductivity,and flexibility.To enrich the research of textiles for microwave a...Fabrics have attracted significant attention in the field of electromagnetic shielding due to their unique grid structure,high electrical conductivity,and flexibility.To enrich the research of textiles for microwave absorption,two-dimensional transition metal carbide(MXene)-enhanced reduced graphene oxide-based fabrics(MXene/RGO fabrics)were synthesized in this paper by using wet spinning–ionic cross-linking–chemical reduction strategy.MXene/RGO fabrics achieve a minimum reflection loss of−58.3 dB at 17.6 GHz and a thickness of 2.4 mm,with an effective absorption bandwidth of 4.92 GHz.In addition,the combination of electromagnetic finite element simulation technology and test results was used to further elucidate the response mode and loss mechanism of MXene/RGO fabrics.The MXene/RGO composite fibers exhibit a tuned attenuation ability and impedance matching performance,which is attributed to the increased polarization relaxation loss caused by the large number of heterogeneous interfaces between RGO,MXene,and TiO2 particles,as well as the appropriate electrical conductivity(16.6 S/cm).MXene/RGO fibers exhibit excellent microwave absorption performance,mechanical strength(534 MPa),easy modification,and fatigue resistance,promising stable absorption of electromagnetic waves in complex environments,thereby expanding the application scenarios of fabrics in the field of microwave absorption.展开更多
Standardization is necessary for the early industrialization of the new materials and technology.It is achieved by having agreed practices for the measurement of properties and other characteristics.The promising use ...Standardization is necessary for the early industrialization of the new materials and technology.It is achieved by having agreed practices for the measurement of properties and other characteristics.The promising use of graphene-based materials in fields like electronics,energy,and composites has resulted in standards for their nomenclature,the measurement of key characteristics,and their specification,etc.Among these,standards for measuring the key characteristics are crucial.The critical parameters are the number of layers,the type and concentration of defects and functional groups,elemental composition,sheet resistance,and carrier mobility.Standards for characterizing these have been analyzed by the International Organization for Standardization Technical Committee in ISO/TC229 and the International Electrotechnical Commission Technical Committee in IEC/TC113.These give details of applicable or preferred samples,the fundamental principles of the techniques,specific precautions,and points for attention in the relevant standards.The pivotal role of the ISO/TC229 and IEC/TC113 standards is considered and challenges and future trends are outlined.展开更多
Today,self-healing graphene-and MXene-based composites have attracted researchers due to the increase in durability as well as the cost reduction in long-time applications.Different studies have focused on designing n...Today,self-healing graphene-and MXene-based composites have attracted researchers due to the increase in durability as well as the cost reduction in long-time applications.Different studies have focused on designing novel self-healing graphene-and MXenebased composites with enhanced sensitivity,stretchability,and flexibility as well as improved electrical conductivity,healing efficacy,mechanical properties,and energy conversion efficacy.These composites with self-healing properties can be employed in the field of wearable sensors,supercapacitors,anticorrosive coatings,electromagnetic interference shielding,electronic-skin,soft robotics,etc.However,it appears that more explorations are still needed to achieve composites with excellent arbitrary shape adaptability,suitable adhesiveness,ideal durability,high stretchability,immediate self-healing responsibility,and outstanding electromagnetic features.Besides,optimizing reaction/synthesis conditions and finding suitable strategies for functionalization/modification are crucial aspects that should be comprehensively investigated.MXenes and graphene exhibited superior electrochemical properties with abundant surface terminations and great surface area,which are important to evolve biomedical and sensing applications.However,flexibility and stretchability are important criteria that need to be improved for their future applications.Herein,the most recent advancements pertaining to the applications and properties of self-healing graphene-and MXene-based composites are deliberated,focusing on crucial challenges and future perspectives.展开更多
The rapid advancement of high-speed electronic devices has driven the need for new materials that can meet the demands for higher performance,miniaturization,and energy efficiency.Among these materials,graphene has ga...The rapid advancement of high-speed electronic devices has driven the need for new materials that can meet the demands for higher performance,miniaturization,and energy efficiency.Among these materials,graphene has garnered significant attention due to its exceptional electrical,thermal,and mechanical properties.This paper reviews the research progress on graphene-based composites and their application in high-speed electronics,focusing on the material's unique characteristics and its potential to enhance the performance of electronic devices.The paper examines various graphene-based composite materials,including graphene/polymer,graphene/metal,and graphene/ceramic composites,highlighting their fabrication methods,functionalization strategies,and integration with other materials.Moreover,the paper explores the critical challenges related to scalability,interface compatibility,and integration with existing semiconductor processes.In addition,performance evaluation methodologies and reliability assessments are discussed in the context of electrical,thermal,and mechanical properties.Despite the promising potential of graphene-based composites,challenges such as cost-effective large-scale production,material dispersion,and interface engineering remain.The review concludes by offering insights into future directions for graphene-based materials in high-speed electronic devices,emphasizing the need for further research into scalable manufacturing techniques and functionalization strategies to overcome these challenges.展开更多
基金financially supported by the National Natural Science Foundation of China(NSFC,no.52472305,no.52173265,no.52302087 and no.52403049)the Science and Technology Planning Project of Sichuan Province(no.2023NSFSC1952 and 2022ZYD0028)+1 种基金the Central Government Guides the Local Science and Technology Development Special Funds,Innovation and Technology Commission-Hong Kong(no.2021Szvup124)the Fundamental Research Funds for the Central Universities(nos.2682021GF004 and 2682022CG005)to freely explore basic research projects.
文摘Fabrics have attracted significant attention in the field of electromagnetic shielding due to their unique grid structure,high electrical conductivity,and flexibility.To enrich the research of textiles for microwave absorption,two-dimensional transition metal carbide(MXene)-enhanced reduced graphene oxide-based fabrics(MXene/RGO fabrics)were synthesized in this paper by using wet spinning–ionic cross-linking–chemical reduction strategy.MXene/RGO fabrics achieve a minimum reflection loss of−58.3 dB at 17.6 GHz and a thickness of 2.4 mm,with an effective absorption bandwidth of 4.92 GHz.In addition,the combination of electromagnetic finite element simulation technology and test results was used to further elucidate the response mode and loss mechanism of MXene/RGO fabrics.The MXene/RGO composite fibers exhibit a tuned attenuation ability and impedance matching performance,which is attributed to the increased polarization relaxation loss caused by the large number of heterogeneous interfaces between RGO,MXene,and TiO2 particles,as well as the appropriate electrical conductivity(16.6 S/cm).MXene/RGO fibers exhibit excellent microwave absorption performance,mechanical strength(534 MPa),easy modification,and fatigue resistance,promising stable absorption of electromagnetic waves in complex environments,thereby expanding the application scenarios of fabrics in the field of microwave absorption.
文摘Standardization is necessary for the early industrialization of the new materials and technology.It is achieved by having agreed practices for the measurement of properties and other characteristics.The promising use of graphene-based materials in fields like electronics,energy,and composites has resulted in standards for their nomenclature,the measurement of key characteristics,and their specification,etc.Among these,standards for measuring the key characteristics are crucial.The critical parameters are the number of layers,the type and concentration of defects and functional groups,elemental composition,sheet resistance,and carrier mobility.Standards for characterizing these have been analyzed by the International Organization for Standardization Technical Committee in ISO/TC229 and the International Electrotechnical Commission Technical Committee in IEC/TC113.These give details of applicable or preferred samples,the fundamental principles of the techniques,specific precautions,and points for attention in the relevant standards.The pivotal role of the ISO/TC229 and IEC/TC113 standards is considered and challenges and future trends are outlined.
文摘Today,self-healing graphene-and MXene-based composites have attracted researchers due to the increase in durability as well as the cost reduction in long-time applications.Different studies have focused on designing novel self-healing graphene-and MXenebased composites with enhanced sensitivity,stretchability,and flexibility as well as improved electrical conductivity,healing efficacy,mechanical properties,and energy conversion efficacy.These composites with self-healing properties can be employed in the field of wearable sensors,supercapacitors,anticorrosive coatings,electromagnetic interference shielding,electronic-skin,soft robotics,etc.However,it appears that more explorations are still needed to achieve composites with excellent arbitrary shape adaptability,suitable adhesiveness,ideal durability,high stretchability,immediate self-healing responsibility,and outstanding electromagnetic features.Besides,optimizing reaction/synthesis conditions and finding suitable strategies for functionalization/modification are crucial aspects that should be comprehensively investigated.MXenes and graphene exhibited superior electrochemical properties with abundant surface terminations and great surface area,which are important to evolve biomedical and sensing applications.However,flexibility and stretchability are important criteria that need to be improved for their future applications.Herein,the most recent advancements pertaining to the applications and properties of self-healing graphene-and MXene-based composites are deliberated,focusing on crucial challenges and future perspectives.
文摘The rapid advancement of high-speed electronic devices has driven the need for new materials that can meet the demands for higher performance,miniaturization,and energy efficiency.Among these materials,graphene has garnered significant attention due to its exceptional electrical,thermal,and mechanical properties.This paper reviews the research progress on graphene-based composites and their application in high-speed electronics,focusing on the material's unique characteristics and its potential to enhance the performance of electronic devices.The paper examines various graphene-based composite materials,including graphene/polymer,graphene/metal,and graphene/ceramic composites,highlighting their fabrication methods,functionalization strategies,and integration with other materials.Moreover,the paper explores the critical challenges related to scalability,interface compatibility,and integration with existing semiconductor processes.In addition,performance evaluation methodologies and reliability assessments are discussed in the context of electrical,thermal,and mechanical properties.Despite the promising potential of graphene-based composites,challenges such as cost-effective large-scale production,material dispersion,and interface engineering remain.The review concludes by offering insights into future directions for graphene-based materials in high-speed electronic devices,emphasizing the need for further research into scalable manufacturing techniques and functionalization strategies to overcome these challenges.
