研究目的
To develop a novel multilayer sandwich fabric-based composite material for infrared stealth and super thermal insulation protection, addressing the lack of efficient, lightweight, and flexible infrared stealth materials based on textiles.
研究成果
The composite material exhibits high infrared stealth performance, super thermal insulation (thermal conductivity as low as 0.013 W/(m?K)), and excellent flame retardancy, making it suitable for military textiles, thermal protection, and energy-saving applications. Future work could optimize the structure for broader use.
研究不足
Potential errors in thermal conductivity simulations due to changes in density, temperature, and humidity; reliance on specific material suppliers and purity; scalability and durability in practical applications not fully addressed.
1：Experimental Design and Method Selection:
The study involved designing a sandwich structure with carbon nanotube-doped aerogel (CNTAs) on polyimide (PI) fabric via hot pressing and coating with low-emissivity Al-doped ZnO (ZAO). Methods included sol-gel synthesis, hot pressing, coating, and various characterizations.
2：Sample Selection and Data Sources:
Materials included PI fabric, carbon nanotubes, ethylsilicate, hydrochloric acid, ammonia water, zinc nitrate, aluminum nitrate, and other chemicals purchased from specified suppliers. Samples were prepared and tested for properties.
3：List of Experimental Equipment and Materials:
Equipment included SEM (TM-1000, Hitachi), TEM (JEM-2100), XRD (D/Max-2550), TG analyzer (204 F1, Netzsch), thermal infrared imaging device (KREVOR FLIR ONE3, FLIR Systems), thermal conductivity instrument (DRL-III), and FAA digital oxygen index apparatus (ATSFAAR). Materials as listed in section 2.
4：Experimental Procedures and Operational Workflow:
1. 4. Experimental Procedures and Operational Workflow: Preparation involved synthesizing CNTAs via sol-gel method, ZAO via precipitation and calcination, and composite via coating and hot pressing. Characterizations included SEM, TEM, XRD, TG analysis, thermal imaging, LOI measurement, thermal conductivity measurement, and simulation using Ansys Workbench.
5：Data Analysis Methods:
Data were analyzed using theoretical derivations (e.g., thermal conductivity formulas), simulation software (Ansys), and standard statistical methods for measurements.
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Scanning Electron Microscope
TM-1000
Hitachi
To determine the morphology of samples at a microscale.
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Thermal Infrared Imaging Device
KREVOR FLIR ONE3
FLIR Systems
To test infrared radiation intensity of coating PI fabric.
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Transmission Electron Microscope
JEM-2100
Japan (likely JEOL, but specified as Japan in paper)
To observe surface morphologies of ZAO and CNTAs.
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X-ray Diffractometer
D/Max-2550
Japan (likely Rigaku, but specified as Japan in paper)
To record crystal structures of samples.
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Thermogravimetric Analyzer
204 F1
Netzsch
To perform thermogravimetric analysis.
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Oxygen Index Apparatus
FAA digital
ATSFAAR
To measure limiting oxygen index (LOI) values.
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Thermal Conductivity Instrument
DRL-III
To measure thermal conductivity of PI fabric and CNTAs.
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Simulation Software
Ansys Workbench
Ansys
For thermodynamic analysis and simulation of temperature distribution.
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