Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 103, Issue 2, Pages 416-424Publisher
SPRINGER
DOI: 10.1007/s10971-022-05756-6
Keywords
Aramid fiber fabric; Hybrid silica aerogel; Freeze drying; Polysilsesquioxanes; Thermal protection performance
Categories
Funding
- Nation Key R&D Program of China [2017YFB0309100]
- China Postdoctoral Science Foundation [2019T120390]
- Jiangsu Planned Projects for Postdoctoral research funds [2018K018A]
- National Natural Science Foundation of China [31470509]
- Key Laboratory of Eco-textiles, Ministry of Education (Fundamental Research Funds for the Central Universities) [JUSRP52007A]
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A novel method of improving the thermal protection performance of protective materials in high temperature flame environment was proposed. The prepared aramid fiber fabric reinforced hybrid silica aerogel composite (AF-HSiO2) exhibited excellent properties and significantly increased thermal protection performance.
A novel method for improving the thermal protection performance of protective materials in high temperature flame environment was provided. The aramid fiber fabric reinforced hybrid silica aerogel composite (AF-HSiO2) was prepared by the two-step sol-gel method using AF nonwovens as the three-dimensional reinforced materials, deionized water as the sole solvent and hybrid silica aerogel (HSiO2) as the growth substrate followed by freeze-drying method (FD). The resulted composites perfectly owned their nano porous structure and excellent properties of high porous (81.12%), low bulk density (0.1612 g cm(-3)) and large surface area (659 m(2) g(-1)). In addition, when the composite was exposed to a high heat flux of 84 +/- 2 kW m(-2), the thermal protection performance increased by 27.97% compared with the commercial thermal liner of fire-fighting clothing. The nature also endowed the composites with tensile strength (319.2 N) and hydrophobic angle (136 degrees). These favorable multi-features indicate that composites have broad prospects in thermal protection filed. [GRAPHICS] .
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