Flexible, large area preparable phase change PVA/P(ILs-AM)/SSD films for electromagnetic wave absorption and infrared stealth

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2025-04-06 DOI:10.1016/j.isci.2025.112366

Yi Liang , Lechun Deng , Bingcheng Luo , Limin Zhang , Kai Tao , Xuexiang Li , Qiang Chen , Hongjing Wu

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Abstract

Electromagnetic wave absorption (EMA) and infrared stealth are two vital ways of anti-detection that it is a great challenge to develop a compatible material which is low-cost, easy to prepare and exhibits excellent mechanical properties. Here, multifunctional films are prepared using one-pot method by wrapping phase change crystals Na₂SO₄·10H₂O (SSD) with dual-network molecular chains. The phase change behavior with high enthalpy (150.8 J/g) at a temperature of 31.2°C can absorb and release latent heat, which endows films with the ability to regulate temperature dynamically. The dual-network acts as phase change buffer-medium to prevent leakage, with excellent mechanical properties, and also provides abundant conductivity and polarization loss. The results show that the films significantly reduce thermal radiation temperature of the target in low-medium temperatures while achieving excellent EMA properties (the effective absorption bandwidth reaches 6 GHz at 1.9 mm). It provides an idea for the development of multi-band compatible functional materials.

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用于电磁波吸收和红外隐身的柔性、大面积可制备相变 PVA/P(ILs-AM)/SSD 薄膜

电磁波吸收（EMA）和红外隐身是反探测的两种重要方式，因此开发一种成本低、易于制备且具有优异机械性能的兼容材料是一项巨大挑战。本文采用一锅法，通过双网络分子链包裹相变晶体 Na2SO4-10H2O（SSD），制备了多功能薄膜。这种相变行为在 31.2°C 的温度下具有高焓（150.8 J/g），可以吸收和释放潜热，从而赋予薄膜动态调节温度的能力。双网络作为相变缓冲介质可防止泄漏，具有优异的机械性能，同时还能提供丰富的导电性和极化损耗。研究结果表明，薄膜在中低温条件下能显著降低目标的热辐射温度，同时还具有优异的 EMA 特性（在 1.9 mm 时有效吸收带宽达到 6 GHz）。这为开发多波段兼容功能材料提供了思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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