Low phosphorus-containing hydrophobic silica aerogels with high thermal stability and outstanding flame retardancy

Li, Zhi; Hu, Min; Shen, Kai; Liu, Qiong; Li, Ming; Wu, Xiaoxu

doi:10.1016/j.polymdegradstab.2024.110830

Polymer Degradation and Stability

2024

DOI: 10.1016/j.polymdegradstab.2024.110830

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Low phosphorus-containing hydrophobic silica aerogels with high thermal stability and outstanding flame retardancy

Zhi Li,

Min Hu,

Kai Shen

et al.

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Enhanced Thermal Safety of Hydrophobic SiO2 Aerogels Through Introduction of Layered Double Oxides

Xu,

Sun,

Chen

et al. 2024

Gels

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This research enhances the thermal safety of hydrophobic silica aerogel (HSA) by integrating layered double oxides (LDOs). XRD and FTIR confirm that the introduction of LDOs does not affect the formation of SA. The LDO/SA composites demonstrate a low density (0.14–0.16 g/cm3), low thermal conductivity (23.28–28.72 mW/(m·K)), high porosity (93.4–96.1%), and a high surface area (899.2–1006.4 m2/g). The TG-DSC results reveal that LDO/SA shows enhanced thermal stability, with increases of 49 °C in the decomposition onset temperature and 47.4 °C in the peak decomposition temperature. The gross calorific value of LDO/SA-15% (with 15 wt% LDO) exhibits a 23.9% reduction in comparison to that of pure SA. The decrease in gross calorific value, along with improved thermal stability, indicates a boost in the thermal safety characteristics of the LDO/SA composites. This study demonstrates that incorporating LDOs enhances the thermal safety of HSA, while preserving its superior performance, thus broadening its potential applications in thermal insulation.

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Enhanced Thermal Safety of Hydrophobic SiO2 Aerogels Through Introduction of Layered Double Oxides

Xu,

Sun,

Chen

et al. 2024

Gels

View full text Add to dashboard Cite

show abstract

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Low phosphorus-containing hydrophobic silica aerogels with high thermal stability and outstanding flame retardancy

Cited by 1 publication

References 71 publications

Enhanced Thermal Safety of Hydrophobic SiO2 Aerogels Through Introduction of Layered Double Oxides

Enhanced Thermal Safety of Hydrophobic SiO2 Aerogels Through Introduction of Layered Double Oxides

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