Waste cotton Fabric/MXene composite aerogel with heat generation and insulation for efficient electromagnetic interference shielding

Electromagnetic interference (EMI) shielding materials have become more and more indispensable due to serious electromagnetic-radiation pollution. Herein, waste cotton cellulose aerogels were prepared by dissolving waste cotton fabrics (WCF) in NaOH/urea aqueous solution, and MXene nanosheets were subsequently deposited on the cellulose aerogels by a facile dip coating method to obtain WCF/MXene composite aerogels. The WCF/MXene composite aerogels with highly porous network structure show remarkable electrical conductivity (8.2 omega/sq of surface resistance), high EMI shielding effectiveness (EMI SE) in the range of 2-18 GHz (39.3-48.1 dB). The WCF/MXene aerogel possesses high SSE and SSE/t of 677.94-829.74 dB cm(3) g(-1) and 3512.62-4299.17 dB cm(2) g(-1)& nbsp;199 & nbsp;C when 3 V positive voltage is applied on them. The WCF/MXene composite aerogels possess excellent electromagnetic shielding effectiveness, heat generation property and insulation, which can be potentially used as multifunctional materials for EMI shielding, electrical-heating and high temperature protection. , respectively (2-18 GHz). In addition, the heating temperature of WCF/MXene composite aerogels reaches

Automated summary

This study prepared waste cotton cellulose aerogels and deposited MXene nanosheets on their surface to obtain WCF/MXene composite aerogels. The composite aerogels exhibited excellent electromagnetic shielding effectiveness and heat generation property, which can be used for electromagnetic shielding, electrical heating, and high temperature protection.