Highly conductive calcium ion-reinforced MXene/sodium alginate aerogel meshes by direct ink writing for electromagnetic interference shielding and Joule heating  

作　　者：Cheng-Zhang Qi Xinyu Wu Ji Liu Xin-Jie Luo Hao-Bin Zhang Zhong-Zhen Yu 

机构地区：[1]Beijing Key Laboratory of Advanced Functional Polymer Composites,Beijing University of Chemical Technology,Beijing 100029,China [2]State Key Laboratory of Organic-Inorganic Composites,College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [3]School of Chemistry,CRANN and AMBER,Trinity College Dublin,D2,Dublin,Ireland

出　　处：《Journal of Materials Science & Technology》2023年第4期213-220,共8页材料科学技术（英文版）

基　　金：Financial support from the National Natural Science Foundation of China(Nos.51922020 and 52090034);the open Foundation of State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology(No.OIC-202201001)are gratefully acknowledged.

摘　　要：Although MXene sheets possess high electrical conductivity and rich surface chemistry and are well suit-able for fabricating electrically conductive nanocomposites for electromagnetic interference(EMI)shield-ing applications,it remains challenging for MXene nanocomposites to achieve tunable EMI shielding per-formances and customized geometries.Herein,an aqueous MXene/sodium alginate ink is developed to print aerogel meshes with customized geometries using a direct ink writing approach.An ion-enhanced strategy is proposed to reinforce the printed aerogel meshes by multi-level cross-linking.The resultant 3D printed aerogel mesh exhibits an ultrahigh electrical conductivity of 2.85×10^(3)S m^(−1),outstanding mechanical properties,and excellent structural stability in wet environment.More importantly,a wide range of tunable EMI shielding efficiencies from 45 to 100 dB is achieved by the structural design of the 3D printed ion-enhanced MXene/sodium alginate aerogel meshes.As a Joule heater,in addition,the printed aerogel meshes can achieve a wide temperature range of 40-135℃at low driving voltages.This work demonstrates a direct ink writing approach for the fabrication of ion-enhanced MXene/sodium al-ginate aerogel meshes with tunable EMI shielding properties and multi-functionalities for applications in many scenarios.

关 键 词：MXene inks AEROGELS Electromagnetic interference shielding Direct ink writing Joule heating 

分 类 号：TB332[一般工业技术—材料科学与工程] TN03[电子电信—物理电子学]