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Construction and evaluation of a heterostructured composite with dual functionality for enhancing flame retardancy and thermal insulation efficiency
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DOI：10.1016/j.mtcomm.2025.112235.png)
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Abstract
En 中文
This study reports an innovative work to enhance the flame retardant and thermal insulation performance of an organic- inorganic hybrid composite by constructing a hierarchical structure using chemical modification, co- solvent complexation, and hot-pressing methods. By chemically crosslinking, physical ultrasonic perforation, and physically filling of polyurethane (PU) polymer, Si-PU/SiO2 was synthesized. Subsequently, the Si-PU/SiO2 composite was bonded with basalt fiber (BF) using a melt-pressing technique to yield BF/Si-PU/SiO2. This work also conducted a comparative analysis of the flame retardant and thermal insulation properties of PU composite materials before and after modification. Thermogravimetric analysis (TGA) showed improved thermal stability after modification, with an increase in limited oxygen index (LOI) value from 16.2 % to 40.5 % and a decrease in thermal conductivity from 0.53 to 0.09 W/mK. The temperature difference (Delta T) of BF/Si-PU/SiO2 increased by 22 degrees C compared to the original PU after a test duration of 10 min in the thermal insulation properties evaluation. The aforementioned findings demonstrate the enhanced flame retardancy and heat insulation characteristics of the modified PU material. This work effectively addresses existing research gaps and promote green development of environmentally friendly functional coating materials with dual-function of flame retardancy and thermal insulation.
Keywords:
Basalt fiber
Chemical and physical modification
Flame retardancy
Organic-inorganic hybrid composite
Thermal insulation performance
Journal
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4.5
Papers:
1.5W
Citations:
3.7W