Abstract
Electromagnetic interference (EMI) shielding fabric is widely used to deal with radiation pollution. However, the traditional EMI shielding fabrics are limited by their reflection-dominated shielding mechanism, large loading and poor shielding performance. Herein, Ti3C2Tx coated cotton fabrics with low Ti3C2Tx loading (1.5–2.6 mg/cm2) were prepared through a facile vacuum filtration process. Ti3C2Tx coated cotton fabric exhibits excellent electrical conductivity (up to 1570 S/cm), EMI SE (up to 48.9 dB) and superior shielding efficiency (up to 2969 dB cm2/g) with a low Ti3C2Tx loading (2.6 mg/cm2) in the frequency of 2–18 GHz. Especially, Ti3C2Tx coated cotton fabric shows high ratio of absorption shielding efficiency (SEA)/reflection shielding efficiency (SER) (> 9) in the frequency of 2–13.5 GHz, indicating that the dominant shielding mechanism of Ti3C2Tx coated cotton fabrics is microwave absorption of EM radiation. Additionally, the Ti3C2Tx coated cotton fabric exhibits a high tensile strength (up to 70 N) and fracture elongation (up to 18.3%). The result suggests that the Ti3C2Tx coated cotton fabric is a superior absorption-dominated EMI shielding material. The Ti3C2Tx coated cotton fabric with low loading, robust, and highly conductive properties can be regarded as an alternative electromagnetic wave absorbing material.
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