College of Materials Science and Engineering, Henan Key Laboratory of Advanced Nylon Materials and Application, Zhengzhou University, Zhengzhou, 450001, China.
Mater Horiz. 2023 Jan 3;10(1):235-247. doi: 10.1039/d2mh01073a.
High-strength nonmetallic materials with low infrared (IR) emission are rare in nature, yet highly anticipated especially in military and aerospace fields for thermal camouflage, IR stealth, energy-saving heating. Here, we reported a high-strength (422 MPa) nonmetallic film with very low IR emissivity (12%), realized by constructing alternating multilayered structures consisting of successive MXene functionalized outer layers and continuous GO reinforced inner layers. This nonmetallic film is capable of competing with typical stainless steel (415 MPa, 15.5%), and exhibits remarkable thermal camouflage performance (Δ = 335 °C), ultrahigh Joule heating capability (350 °C at 2 V), excellent solar-to-thermal conversion efficiency (70.2%), and ultrahigh specific electromagnetic interference shielding effectiveness (83 429 dB cm). Impressively, these functionalities can be maintained well after prolonged outdoor aging, and even after undergoing harsh application conditions including strong acid/alkali and boiling water immersion, and cryogenic (-196 °C) temperature.
高强度、低红外发射率的非金属材料在自然界中较为罕见，但在军事和航空航天领域却备受期待，因为它们可用于热伪装、红外隐身和节能加热。在此，我们报道了一种高强度（422 MPa）、低红外发射率（12%）的非金属薄膜，其通过构建由连续的 MXene 功能化外层和连续的 GO 增强内层交替组成的多层结构来实现。该非金属薄膜的性能可与典型的不锈钢（415 MPa，15.5%）相媲美，且表现出优异的热伪装性能（Δ=335 °C）、超高焦耳加热能力（2 V 时 350 °C）、出色的太阳能-热能转换效率（70.2%）和超高的特定电磁干扰屏蔽效能（83 429 dB cm）。令人印象深刻的是，这些功能在长时间的户外老化后仍能保持良好，甚至在经历包括强酸/强碱和沸水浸泡以及低温（-196 °C）在内的苛刻应用条件后仍能保持良好。
