Layer‐by‐Layer Assembly of Multifunctional NR/MXene/CNTs Composite Films with Exceptional Electromagnetic Interference Shielding Performances and Excellent Mechanical Properties

Abstract

With the rapid advance of electronics, the light, flexible, and multifunctional composite films with high electromagnetic interference (EMI) shielding effectiveness and excellent thermal management are highly desirable for next‐generation portable and wearable electronic devices. Herein, a series of flexible and ultrathin natural rubber/MXene/carbon nanotubes (NR/MXene/CNTs) composite films with sandwich structure are constructed layer by layer through a facile vacuum‐assisted filtration method for EMI shielding and Joule heating application. The fabricated NR/MXene/CNTs‐50 composite film, with NR/MXene as inner layer and NR/CNTs as out layers, not only has high EMI shielding efficiency, but also has excellent comprehensive mechanical properties at the thickness of only 200 µm. In addition, the superior environmental durability, high electrothermal conversion efficiency, hydrophobicity, and fine performance stability after periodic cyclic bending make the film possess more value in practical application.

Engineering asymmetric multifunctional phase change composites for improved electromagnetic interference shielding and wireless personal thermal therapy

“…As the MXene is prone to be oxidized, the PDA was combined with MXene to enhance the structural and chemical stability of MXene. 28 The MXene–PDA dispersion was successfully produced and proved by FTIR characterization (Fig. S1†), then MXene@PDA was co-vacuum filtered to produce a thin film which was observed to have a continuous and smooth surface by SEM observation (Fig.…”

Rapid synthesis of MXenes and their potential risk to bacterial communities in the tomato rhizosphere

“…52,53 The peak observed at 1625 cm −1 was assigned to the stretching vibration of the CO bonds, while the peak at approximately 1125 cm −1 was attributed to the stretching vibration of the C-O bonds. 54 The band at 1386 cm −1 can be ascribed to the deformation vibrations of the O-H bonds, whereas the band at 559 cm −1 is assigned to the Ti-O bonds. 55,56 The E-Ti 3 C 2 nanosheets also exhibited excellent hydrophilicity, and the contact angle, as measured by vacuum filtration of E-Ti 3 C 2 onto a nylon substrate, was found to be 54.06°, as shown in Fig.…”

Structure Design and Processing Strategies of MXene‐Based Materials for Electromagnetic Interference Shielding

“…[ 49 ] With the same method but using natural rubber (NR), a composite can reach an EMI SE of 53.6 dB, with a similar electrical conductivity of 14.00 S cm −1 , but at a thickness of 251 µm. [ 50 ] Even with the inclusion of CNT in a sandwich structure NR/MXene/CNT, [ 51 ] the performance did not improve if compared to the last mentioned composite as it revealed an EMI SE of 49.9 dB and an electrical conductivity of 417 S cm −1 at a thickness of 200 µm. The agglomeration of CNT and MXene led to this lower performance, which is a recurring problem in the preparation of polymer composites.…”