A PBFDO-Based Protective Material with Tunable Infrared Emissivity Integrating Thermal Management and Electromagnetic...

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Science

Background:

• Advanced aerospace and electronics require materials with integrated infrared (IR) signal modulation, electromagnetic interference (EMI) shielding, and active thermal management.
• Existing materials often lack the multifunctionality needed for demanding applications.

Purpose of the Study:

• To develop a multifunctional composite material with dynamic IR camouflage, EMI shielding, and active thermal management capabilities.
• To demonstrate a versatile design strategy for intelligent adaptive materials.

Main Methods:

• Integration of poly(benzodifurandione) (PBFDO), polyimide (PI) film, humidity-adaptive nanoporous polyethylene (HANPE), and silica aerogel (SA) into a multilayer architecture (HPPS).
• Characterization of electrical conductivity, IR emissivity, EMI shielding effectiveness, and electrothermal performance.

Main Results:

• The HPPS composite exhibited high electrical conductivity (1732.1 S/cm) and low intrinsic IR emissivity (0.19 ± 0.02).
• Achieved dynamic, passive IR camouflage with tunable emissivity (0.17-0.60), reducing apparent temperature by 19.6°C.
• Demonstrated excellent EMI shielding (43.85 dB) and active thermal control (28.9°C to 108°C at 0-4 V).

Conclusions:

• The rationally designed HPPS composite offers synergistic functionalities for advanced applications.
• This work presents a versatile strategy for creating intelligent adaptive materials with integrated passive and active capabilities.
• The material enables on-demand thermal camouflage and rapid de-icing.