关键词: MXene, 光发热, 钝伤效应, 电磁屏蔽

Abstract: The modern warfare environment is complex and variable, with personnel and equipment facing diverse threats such as extreme cold, electromagnetic radiation, and ballistic impacts. Therefore, it is essential to develop lightweight and portable multifunctional protective materials to further safeguard the safety of combatants and weaponry. The physical superposition of single-function fabrics to achieve a multifunctional composite can lead to a significant increase in material costs and quality. While there has been research and development on multifunctional fabrics, there has yet to be a multifunctional fabric that integrates five battlefield-required functionalities: waterproofing, electromagnetic shielding, flame resistance, photothermal effects, and blunt force protection. MS-Twaron uses MXene materials as the functional layer and employs aramid fibers(Twaron) as the base material with silicone gel as the surface waterproof layer. The results of the contact angle test, electromagnetic interference(EMI) shielding test, flame retardancy test, ballistic test, and photothermal experiment indicate that: 1）Compared to the hydrophilic material Twaron (water contact angle of 29.7°), MS-Twaron exhibits excellent hydrophobic properties (water contact angle of 112.3°). 2）Compared to Twaron, which exhibits no EMI properties, the MS-Twaron material with an MXene mass fraction of 8.61% shows an improved EMI properties in the X-band, ranging from 13.490 dB to 14.969 dB. 3）Compared to Twaron, MS-Twaron exhibits an increase in afterglow time by 5.0 s, a reduction in glowing time by 3.5 s, and a decrease in average char length by 5.3 mm. 4）MS-Twaron has impact resistance properties. (The ballistic indentation depth of MS-Twaron is 6.12 mm smaller than that of Twaron.) 5）Compared to Twaron, MS-Twaron can achieve a surface temperature of up to 50.22 °C under natural light (intensity 100.3 × 103 LUX), 39.58 °C under incandescent light (100 W, 30 cm), and 97.18 °C under infrared light (375 W, 40 cm). With its integration of lightweight, photothermal, and EMI properties, MS-Twaron offers design insights for the next-generation multifunctional protective equipment.

Key words: MXene, photothermal property, behind armor blunt trauma, electromagnetic shielding