Sequentially bridged MXene platelets for strong high‐temperature EM‐IR bi‐stealth sheets  

作　　者：Yushan Yang Kaicong Chen Yipeng Chen Chao Wang Baokang Dang Yingying Li Ming Liu Qingfeng Sun 

机构地区：[1]College of Chemistry and Materials Engineering,Zhejiang A&F University,Hangzhou,China [2]Guangxi Fenglin Wood Industry Group Co.Ltd,Nanning,China

出　　处：《SmartMat》2024年第1期121-134,共14页智能材料（英文）

基　　金：supported by the Nanning Innovation and Entrepreneurship Leading Talents“Yongjiang Plan”Project of Guangxi Province,China(No.2021016);Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars of China(No.LR19C160001);the Scientific Research Foundation of Zhejiang A&F University(No.2019FR009).

摘　　要：Combination of flexible multifunctional stealth technology properties such as electromagnetic(EM)and infrared(IR)stealth is crucial to the development of aerospace,military,and electronic fields,but the synthesis technology still has a significant challenge.Herein,we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion(MXCB)sheets with strong high‐temperature EM‐IR bi‐stealth through sequential bridging of hydrogen and covalent bonds.The resultant MXCB sheets display high conductivity and good mechanical features such as flexibility,stretchability,fatigue resistance,and ultrasonic damage.MXCB sheets have a high tensile strength of 795 MPa.Furthermore,MXCB sheets with different thicknesses indicate exceptional high‐temperature thermal‐camouflage characteristics.This reduces the radiation temperature of the target object(>300°C)to 100°C.The conductivity of MXCB sheet with 3μm thickness is 6108 S/cm and the EM interference(EMI)shielding value is 39.74 dB.The normalized surface‐specific EMI SE absolute shielding effectiveness(SSE/t)is as high as 39312.78 dB·cm2/g,which remained 99.39%even after 10,000 times repeated folding.These multifunctional ultrathin MXCB sheets can be arranged by vacuum‐assisted induction to develop EM‐IR bi‐stealth sheet.

关 键 词：cellulose lamellae EM‐IR bi‐stealth mechanically strong MXene platelets transition metal carbides 

分 类 号：TB381[一般工业技术—材料科学与工程]