There is an urgent demand for flexible,lightweight,mechanically robust,excellent electromagnetic interference(EMI)shielding materials.Two-dimensional(2D)transition metal carbides/nitrides(MXenes)have been potential ca...There is an urgent demand for flexible,lightweight,mechanically robust,excellent electromagnetic interference(EMI)shielding materials.Two-dimensional(2D)transition metal carbides/nitrides(MXenes)have been potential candidates for the construction of excellent EMI shielding materials due to their great electrical electroconductibility,favorable mechanical nature such as flexibility,large aspect ratios,and simple processability in aqueous media.The applicability of MXenes for EMI shielding has been intensively explored;thus,reviewing the relevant research is beneficial for advancing the design of high-performance MXene-based EMI shields.Herein,recent progress in MXene-based macrostructure development is reviewed,including the associated EMI shielding mechanisms.In particular,various structural design strategies for MXene-based EMI shielding materials are highlighted and explored.In the end,the difficulties and views for the future growth of MXene-based EMI shields are proposed.This review aims to drive the growth of high-performance MXene-based EMI shielding macrostructures on basis of rational structural design and the future high-efficiency utilization of MXene.展开更多
The rapid development of communication technology and electronic industry has brought unprecedented serious electromagnetic interference(EMI)and electromagnetic wave(EMW)pollution.Although EMI shields and EMW absorber...The rapid development of communication technology and electronic industry has brought unprecedented serious electromagnetic interference(EMI)and electromagnetic wave(EMW)pollution.Although EMI shields and EMW absorbers based on metal or magnetic materials were used to solve these problems,they have long been criticized for their high price,high density and easy corrosion.In order to achieve low density and efficient dissipation of electromagnetic energy,aerogels stand out among manifold materials.However,constructing aerogels with good EMI shielding or EMW absorption performance and acceptable mechanical properties is not an easy task.Burgeoning biopolymers,such as cellulose,lignin,chitin/chitosan and alginate,breathe new life into aerogels for high-efficiency EMW shielding and absorbing.Here,we reviewed the contributions of biopolymers in the fields of aerogels for EMW shielding and absorbing.At the same time,some challenges and outlook were also pointed out,aiming to promote the advance of aerogel-based EMI shields and EMW absorbers as well as the rational utilization of biopolymers.展开更多
With the rapid development of the electronic industry and wireless communication technology,electromagnetic interference(EMI)or pollution has been increasingly serious.This not only severely endangers the normal opera...With the rapid development of the electronic industry and wireless communication technology,electromagnetic interference(EMI)or pollution has been increasingly serious.This not only severely endangers the normal operation of electronic equipment but also threatens human health.Therefore,it is urgent to develop high-performance EMI shielding materials.The advent of hydrogel-based materials has given EMI shields a novel option.Hydrogels combined with conductive functional materials have good mechanical flexibility,fatigue durability,and even high stretchability,which are beneficial for a wide range of applications,especially in EMI shielding and some flexible functional devices.Herein,the current progress of hydrogel-based EMI shields was reviewed,in the meanwhile,some novel studies about pore structure design that we believe will help advance the development of hydrogel-based EMI shielding materials were also included.In the outlook,we suggested some promising development directions for the hydrogel-based EMI shields,by which we hope to provide a reference for designing hydrogels with excellent EMI shielding performance and multifunctionalities.展开更多
With the increasingly serious electromagnetic wave(EMW)pollution,the development of high-performance EMW absorbing materials(EWAMs)has become a hot topic.Carbon-based EWAMs have excellent chemical stability,high elect...With the increasingly serious electromagnetic wave(EMW)pollution,the development of high-performance EMW absorbing materials(EWAMs)has become a hot topic.Carbon-based EWAMs have excellent chemical stability,high electrical conductivity,and strong dielectric loss.In particular,three-dimensional(3D)porous carbon-based EWAMs have been widely developed in the EMW absorption field.The 3D porous structure not only reduces the materials’mass density,but also improves the multiple reflections of incident EMWs and impedance matching.The carbon-based EWAMs are thus expected to achieve the goals of low density,low thickness,wide absorption bandwidth,and strong absorption.Herein,we first restated the relevant theoretical basis and evaluation methods.Then,we summarized the recent research progress of 3D porous carbon-based EWAMs with the source of the materials as the main clue.Some unique and novel viewpoints were highlighted.Finally,the challenges and prospects of 3D porous carbon-based EWAMs were put forward,which is helpful for guiding a further development of high-performance EWAMs.展开更多
基金supported by the National Key R&D Program of China (No. 2021YFB3502500)National Natural Science Foundation of China (No. 22205131)+6 种基金Natural Science Foundation of Shandong Province (No. 2022HYYQ014, ZR2016BM16)Provincial Key Research and Development Program of Shandong (No. 2021ZLGX01)Discipline Construction Expenditure for Distinguished Young Scholars of Shandong University (31370089963141)“20 Clauses about Colleges and Universities (new)” (Independent Training of Innovation Team) Program (2021GXRC036)Shenzhen Municipal Special Fund for Guiding Local Scientific and Technological Development (China 2021Szvup071)Qilu Young Scholar Program of Shandong University (No. 31370082163127)the National Natural Science Foundation of China (No. 22375115)
文摘There is an urgent demand for flexible,lightweight,mechanically robust,excellent electromagnetic interference(EMI)shielding materials.Two-dimensional(2D)transition metal carbides/nitrides(MXenes)have been potential candidates for the construction of excellent EMI shielding materials due to their great electrical electroconductibility,favorable mechanical nature such as flexibility,large aspect ratios,and simple processability in aqueous media.The applicability of MXenes for EMI shielding has been intensively explored;thus,reviewing the relevant research is beneficial for advancing the design of high-performance MXene-based EMI shields.Herein,recent progress in MXene-based macrostructure development is reviewed,including the associated EMI shielding mechanisms.In particular,various structural design strategies for MXene-based EMI shielding materials are highlighted and explored.In the end,the difficulties and views for the future growth of MXene-based EMI shields are proposed.This review aims to drive the growth of high-performance MXene-based EMI shielding macrostructures on basis of rational structural design and the future high-efficiency utilization of MXene.
基金supported by the National Key R&D Program of China (No.2021YFB3502500)the Natural Science Foundation of Shandong Province (Nos.2022HYYQ-014,ZR2016BM16)+3 种基金the Pro-Vincial Key Research and Development Program of Shandong (Nos.2019JZZY010312,2021ZLGX01)"20 Clauses about Colleges and Universities (new)" (Independent Training of Innovation Team)Program (2021GXRC036)the Shenzhen Municipal Special Fund for Guiding Local Scientific and Technological Development (China 2021Szvup071)the Qilu Young Scholar Program of Shandong University (No.31370082163127)。
文摘The rapid development of communication technology and electronic industry has brought unprecedented serious electromagnetic interference(EMI)and electromagnetic wave(EMW)pollution.Although EMI shields and EMW absorbers based on metal or magnetic materials were used to solve these problems,they have long been criticized for their high price,high density and easy corrosion.In order to achieve low density and efficient dissipation of electromagnetic energy,aerogels stand out among manifold materials.However,constructing aerogels with good EMI shielding or EMW absorption performance and acceptable mechanical properties is not an easy task.Burgeoning biopolymers,such as cellulose,lignin,chitin/chitosan and alginate,breathe new life into aerogels for high-efficiency EMW shielding and absorbing.Here,we reviewed the contributions of biopolymers in the fields of aerogels for EMW shielding and absorbing.At the same time,some challenges and outlook were also pointed out,aiming to promote the advance of aerogel-based EMI shields and EMW absorbers as well as the rational utilization of biopolymers.
基金supported by the Provincial Key Research and Development Program of Shandong(Nos.2019JZZY010312 and 2021ZLGX01)New 20 Funded Programs for Universities of Jinan(No.2021GXRC036)Shenzhen municipal special fund for guiding local scientific and technological development(No.China2021Szvup071).
文摘With the rapid development of the electronic industry and wireless communication technology,electromagnetic interference(EMI)or pollution has been increasingly serious.This not only severely endangers the normal operation of electronic equipment but also threatens human health.Therefore,it is urgent to develop high-performance EMI shielding materials.The advent of hydrogel-based materials has given EMI shields a novel option.Hydrogels combined with conductive functional materials have good mechanical flexibility,fatigue durability,and even high stretchability,which are beneficial for a wide range of applications,especially in EMI shielding and some flexible functional devices.Herein,the current progress of hydrogel-based EMI shields was reviewed,in the meanwhile,some novel studies about pore structure design that we believe will help advance the development of hydrogel-based EMI shielding materials were also included.In the outlook,we suggested some promising development directions for the hydrogel-based EMI shields,by which we hope to provide a reference for designing hydrogels with excellent EMI shielding performance and multifunctionalities.
基金supported by the National Key R&D Program of China(2021YFB3502500)the Natural Science Foundation of Shandong Province(2022HYYQ-014 and ZR2016BM16)+4 种基金the Provincial Key Research and Development Program of Shandong(2019JZZY010312)the New 20 Funded Programs for University of Jinan(2021GXRC036)Shenzhen Municipal Special Fund for Guiding Local Scientific and Technological Development(China 2021Szvup071)the Joint Laboratory Project of Electromagnetic Structure Technology(637-2022-70-F-037)Qilu Young Scholar Program of Shandong University(31370082163127)。
文摘With the increasingly serious electromagnetic wave(EMW)pollution,the development of high-performance EMW absorbing materials(EWAMs)has become a hot topic.Carbon-based EWAMs have excellent chemical stability,high electrical conductivity,and strong dielectric loss.In particular,three-dimensional(3D)porous carbon-based EWAMs have been widely developed in the EMW absorption field.The 3D porous structure not only reduces the materials’mass density,but also improves the multiple reflections of incident EMWs and impedance matching.The carbon-based EWAMs are thus expected to achieve the goals of low density,low thickness,wide absorption bandwidth,and strong absorption.Herein,we first restated the relevant theoretical basis and evaluation methods.Then,we summarized the recent research progress of 3D porous carbon-based EWAMs with the source of the materials as the main clue.Some unique and novel viewpoints were highlighted.Finally,the challenges and prospects of 3D porous carbon-based EWAMs were put forward,which is helpful for guiding a further development of high-performance EWAMs.
