Key Words:CARBIDE; COMPOSITE; ULTRATHIN; CLAY

Abstract:The simultaneous realization of high mechanical properties and excellent multifunctional performance for nanocomposite films is still a key challenge for practical applications. In this work, a dilute MXene (Al-Ti3C2Tx)/aramid nanofiber (ANF) dispersion (0.013 wt%) containing large-sized, long-term stable Al-Ti3C2Tx nanosheets (5.58 /- 1.68 mu m) and branched ANFs was filtered under vacuum pressure to obtain highly ordered layered Al-Ti3C2Tx/ANF nanocomposite films with different Al-Ti3C2Tx contents (orientation factor: 0.91). Among them, the 40 wt% Al-Ti3C2Tx/ANF film offers the benefits of excellent mechanical properties (strength: 200.79 /- 1.32 MPa, strain-to-failure: 8.05 /- 0.65 %, toughness: 9.96 /- 0.84 MJ/m(3)), high electrical conductivity (201.6 /- 5.5 S/cm), superior EMI shielding effectiveness of up to 15 264 dB cm(2) g(-1) in accordance with the theoretical calculation and high electrothermal conversion temperature up to approximate to 120.7 degrees C with a rapid response time of 4 s. In addition, the nanocomposite film also boasts a superhydrophobic property with a water contact angle of 162.0 /- 1.6 degrees along with flame retardancy. The inherent properties of 2D materials and their highly ordered arrangement in the polymer matrix are expected to provide a feasible design proposal for preparing all-in-one multifunctional films.

Volume:50

Issue:7

Translation or Not:no