Layer-by-layer assembly of calixarene modified GO and LDH nanostructures on flame retardancy, smoke suppression, and dye adsorption behavior of flexible polyurethane foams

•The effect of LbL coatings on the fire resistance of flexible polyurethane foam was investigated.•MB dye adsorption behavior of the coated flexible polyurethane foam was evaluated.•LDH-GOSC4A coatings significantly reduce the amount of PHRR, THR and TSP values.•The PUF/LDH-GOSC4A 9BL foam showed the highest fire resistance.•The maximum adsorption capacity of PUF/LDH-GOSC4A 9BL was obtained 38.46 mg/g.