Intumescent flame retardancy and smoke suppression of Eucommia ulmoides gum/natural rubber blends based on synergistic g-C3N4@Fe3O4 nanocomposites

A flame retardant synergist (g-C 3 N 4 @Fe 3 O 4 ) was designed through in situ co-precipitation method by using graphitized carbon nitride (g-C 3 N 4 ) and Fe 3 O 4 , and flame retardancy of EUG/NR was improved by variable IFR and g-C 3 N 4 @Fe 3 O 4 content.