Research on the utilization of fly ash and rice husk silica as fillers for flame-retardant silicone rubber materials
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https://doi.org/10.54939/1859-1043.j.mst.112.2026.101-107Keywords:
Flame retardant materials; Fire retardant additives; Fly ash; Rice husk silica; Silicone rubber; Anti-structuring silanol agent.Abstract
This paper investigates the effects of halogenated flame retardants (DBDPO, DBDPE, and Chloroparaffin), halogen-free fillers derived from industrial and agricultural waste (Fly Ash and Biosilico amorphous silica from rice husk), and the anti-structuring silanol agent ND-8 on the fire resistance of silicone rubber materials. The results demonstrate that incorporating 100 phr (parts per hundred rubber) of Fly Ash combined with Biosilico amorphous silica and silanol ND-8 into the silicone rubber compound facilitates the creation of a novel material with superior fire resistance. This improvement is attributed to the formation of a stable mullite and cristobalite ceramic surface layer, resulting in a residual ash content of 60% upon combustion. The material achieved a 5 VA rating (the highest level under the UL-94 standard), while simultaneously contributing to resource conservation and environmental pollution mitigation.
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