Multifunctional durable film with hierarchical structure and preparation method

Abstract

The invention discloses a multifunctional durable thin film with a hierarchical structure and a preparation method, the multifunctional durable thin film comprises a bionic lotus leaf super-hydrophobic layer polydimethylsiloxane / silicon dioxide (PDMS / SiO2), a conductive layer MXene and an enhancement layer nano aramid fiber, the thickness of the hydrophobic layer is 3-10 [mu] m, the thickness of the conductive layer is 3-50 [mu] m, the thickness of the enhancement layer is 10-50 [mu] m, and the thickness of the enhancement layer is 10-50 [mu] m. All the functional layers are firmly connected through hydrogen bond interaction, and meanwhile the coupling enhancement effect is achieved through the performance of the functional layers. Multi-level structural design is achieved through vacuum filtration, hot press molding and spraying curing processes, and the prepared composite film has good flexibility and mechanical strength, efficient electromagnetic shielding performance, excellent super-hydrophobic self-cleaning performance and excellent weather resistance and high-temperature resistance; the method is suitable for application in the fields of military, electronic equipment and aerospace in severe environments.

Description

technical field [0001] The invention belongs to the technical field of composite film materials, and relates to a multifunctional weather-resistant film with a hierarchical structure and a preparation method thereof. Background technique [0002] The rapid development of electronic information technology, especially the 5G communication technology that has emerged in recent years, has brought efficiency and convenience to the society, but the electromagnetic radiation it produces has caused increasingly serious problems, not only causing interference and damage to the surrounding electronic devices, At the same time, electromagnetic radiation exceeding the threshold will become another new pollution source that threatens health. In view of the above problems, the most effective means of defense is to use electromagnetic shielding materials. Commonly used electromagnetic shielding materials are various metals and their powders. Because of their high conductivity and magnetic ...

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Problems solved by technology

However, MXene has the disadvantages of low flexibility and easy oxidation, which limits its application in military, electronic equipment and aerospace fields, especially in harsh environments.

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