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Designed Composite Aerogels With Solid-Solid Phase Transition and Nanoscale Pores for Infrared Stealth.
Yanyan Wang1,2, Nan Pang1,2, Xiaoqing Yin1,2
1Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education, Shandong University, Jinan, Shandong, 250061, China.
Small (Weinheim an Der Bergstrasse, Germany)
|April 10, 2025
Summary
New composite aerogels offer advanced infrared stealth by combining phase change materials (PCMs) and thermal insulation without leakage. These materials effectively regulate temperature and reduce surface radiation for enhanced stealth applications.
Area of Science:
- Materials Science
- Nanotechnology
- Thermal Engineering
Background:
- Phase change materials (PCMs) and thermal insulation are crucial for infrared stealth.
- Traditional PCMs suffer from leakage and poor structural integrity.
- Developing advanced materials with stable thermal regulation is essential.
Purpose of the Study:
- To design a novel composite aerogel with dual solid skeletons for infrared stealth.
- To overcome the limitations of traditional PCMs, such as leakage and structural instability.
- To achieve efficient temperature regulation and enhanced thermal insulation properties.
Main Methods:
- Homogeneous mixing was employed to create a composite aerogel with dual solid skeletons.
- Characterization of the aerogel's nanoporous structure, thermal conductivity, and phase transition properties.
- Evaluation of cyclic stability, long-term durability, and infrared stealth performance.
Main Results:
- The composite aerogel exhibits a stable nanoporous structure and solid-solid phase transition capability without PCM leakage.
- Lower thermal conductivity compared to pure polyimide (PI) aerogels due to reduced density and intricate pore structure.
- High phase transition enthalpy (111 J g⁻¹), significant surface temperature moderation, and excellent cyclic stability.
- Demonstrated infrared stealth performance by reducing surface temperature from 136°C to 25.5°C.
Conclusions:
- The developed composite aerogel offers a promising solution for advanced infrared stealth applications.
- The material's unique structure provides effective temperature regulation and thermal insulation without leakage.
- This research paves the way for designing next-generation infrared stealth materials with flexible thermal management capabilities.
