Super-Stretchable, Self-Healing 2D MXene-Based Composites for Thermal Management and Electromagnetic Shielding Applications

Abstract

MXene-based elastomeric electromagnetic radiation shielding composites are encouraging aspirants to ensure the secure performance of stretchable and wearable electronic gadgets. However, it is a tough challenge to construct effective stretchable elastomer/MXene composites with outstanding electromagnetic radiation shielding efficiency, healing capability, thermal management, and recyclability. To simultaneously promote the multifunctional characteristics of the elastomeric composites, we prepared zinc oxide cross-linked and 1-(3-aminopropyl) imidazole (API)-grafted XNBR/MXene composites by forming continuous conductive nacre-like network via a simple two-step wet cum melt mixing strategy. Contributed by the structure, the composites show excellent shielding effectiveness of −27.4 dB (in the frequency range of 8.2−12.4 GHz) and a thermal conductivity of 1.24 W/mK while retaining the electrical conductivity of 0.5 S/cm, room temperature self-healing ability of 46.8%, and 100% recyclability with desirable stretchability and mechanical strength. Notably, the continuous conducting network remains unaffected even after reprocessing, stretching, bending, extended sunlight exposure, and chemical treatment, which validates its all-round chemical and mechanical performance. Such prolonged deformations show more than 95% retention of shielding effectiveness. Collectively, our multifunctional elastomeric composites supply a prominent directive for the establishment of high-performance elastomeric composites with outstanding shielding efficiency, self-healing ability, thermal management, recyclability, and excellent mechanical behavior.

Carbonized Syndiotactic Polystyrene/Carbon Nanotube/MXene Hybrid Aerogels with Egg-Box Structure: A Platform for Electromagnetic Interference Shielding and Solar Thermal Energy Management

“…These findings demonstrated the advantageous impact of MXene on the conductive networks, resulting in higher SE R and corresponding SE total . The skin depth (δ) was determined using a semi-empirical relationship, δ = 8.86 × t /SE A , where t is the thickness. ,, The skin depth of CCM- x - y aerogels demonstrated a significant reduction compared to their physical thickness of 2 mm, indicating their potential for commercial applications even in thin form (Figure S3).…”

“…Consequently, safeguards against X-band wave are gaining prominence. Electromagnetic interference (EMI) shielding materials, including carbon aerogels, , metallic materials, composite foams, , polymeric composites, − and cementitious composites, are booming. These materials possess high electrical conductivity, which plays a critical role to achieve high EMI shielding effectiveness (SE). − Moreover, the topological structure can significantly affect the materials’ EMI SE, for example, the gradient and/or sandwich structures were demonstrated to enhance the effectiveness by facilitating multiple reflections between parallel reflective planes. ,,, …”

Superelastic, highly conductive, and superhydrophobic silver nanowires@polypyrrole hybrid aerogels with outstanding electromagnetic interference shielding and Joule heating performance

“…Several materials, such as metals, 8–10 CNTs, 11–13 graphene, 14–16 carbon, 17,18 and MXenes, 3,19–21 have been widely used to fabricate EMI shielding materials. In accordance with the Faraday cage effect, metals such as silver and copper, which possess high electrical conductivity, exhibit excellent EMI shielding effectiveness (SE).…”

Constructing interfacial polarization sites within a honeycomb-like porous structureviaa spatially confined-etching strategy for boosting electromagnetic wave absorption

“…The increasing demand for wireless communication and military applications, coupled with the continuous development of modern electromagnetic information technology, brings about increasingly serious electromagnetic wave (EMW) radiation interference. 1–3 In order to avoid secondary electromagnetic pollution, it is urgent to develop new materials with efficient EMW absorption. Recently, research on EMW absorbents has focused on metal oxides, 4 ferrites, 5 conductive polymers, 6 metal–organic frameworks (MOFs), 7 etc.…”