Designed VO2/ANF/PVA aerogel composite material for adaptive infrared stealth and dynamic thermal regulation

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-09-15 DOI:10.1016/j.coco.2025.102589

Mengyao Li , Changqing Fang , Youliang Cheng , Xin Zhang , Jie Liu , Kun Xiang , Yue zhang

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引用次数: 0

Abstract

The rapid advancement of infrared detection technologies poses formidable challenges to conventional stealth materials. However, most existing infrared stealth materials rely on a single mechanism-either surface emissivity modulation or thermal conduction blocking-which limits their capacity to deliver durable and stable performance. Herein, a novel vanadium dioxide (VO₂)/aramid nanofiber (ANF)/polyvinyl alcohol (PVA) aerogel composite was successfully fabricated through a vacuum filtration and freeze-drying process. In this system, ANF and PVA form a robust support framework with exceptional mechanical properties, while VO₂ nanoparticles provide dynamic thermal camouflage properties. The resulting VO₂/ANF/PVA aerogel exhibited a low density of 0.052 ± 0.002 g/cm³, minimal shrinkage rate of 3.5 ± 0.2 %, high porosity of 96.5 ± 0.3 %, substantial compressive stress (0.169 ± 0.001 MPa at 75 % strain), and extremely low thermal conductivity of 0.048 ± 0.003 W/(m·K). Notably, the aerogel demonstrated significant infrared emissivity modulation (from 0.92 to 0.6) across a temperature range of 15–100 °C. As a thermal camouflage coating, it reduced the radiative temperature of a 70 °C object to 17.9 °C while maintaining stable performance for over 2000 s. This study achieved synergistic optimization of material structure and functionality through design of composite structures, offering valuable insights for developing advanced adaptive stealth materials.

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设计了VO2/ANF/PVA气凝胶复合材料，用于自适应红外隐身和动态热调节

红外探测技术的飞速发展对传统的隐身材料提出了严峻的挑战。然而，大多数现有的红外隐身材料依赖于单一的机制——要么是表面发射率调制，要么是热传导阻断——这限制了它们提供持久和稳定性能的能力。本文通过真空过滤和冷冻干燥制备了一种新型的二氧化钒(VO2)/芳纶纳米纤维(ANF)/聚乙烯醇（PVA）气凝胶复合材料。在该系统中，ANF和PVA形成了具有优异机械性能的坚固支撑框架，而VO2纳米颗粒提供了动态热伪装性能。所得VO2/ANF/PVA气凝胶具有低密度（0.052±0.002 g/cm3）、最小收缩率（3.5±0.2%）、高孔隙率（96.5±0.3%）、可观的压应力（75%应变时0.169±0.001 MPa）和极低的导热系数（0.048±0.003 W/(m·K)）。值得注意的是，气凝胶在15-100°C的温度范围内表现出显著的红外发射率调制（从0.92到0.6）。作为一种热伪装涂层，它可以将70℃物体的辐射温度降低到17.9℃，同时保持2000 s以上的稳定性能。本研究通过复合材料结构的设计实现了材料结构和功能的协同优化，为开发先进的自适应隐身材料提供了有价值的见解。

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

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.