LAUSR

Abstract A facile preparation of decanoic/palmitic eutectic mixture (DPEM) modified silica fume geopolymer-based hybrid coating was preliminarily studied, the effect of DPEM on its flame retardancy and microstructure was characterized by techniques including cone calorimeter (CC), TG, and SEM-EDS. The experimental results showed that the appropriate dosage of decanoic/palmitic (1:1, wt%) fatty acid was equal to 1.5 wt%, which was beneficial to form a uniform and continuous barrier layer, leading to an enhancement of flame retardant efficiency, evidenced by the result that the fire performance index (FPI) climbed from 0.14 to 0.58 s·m2·kW−1 and fire growth index (FGI) decreased from 1.97 to 0.71 kW·m−2·s−1. It determined that the incorporation of DPEM into silica fume geopolymer-based coating was an effective method to prepare an efficient and eco-friendly flame-retardant coating.