Development of low environmental impact protective coatings based on a furan resin and cellulose nanocrystals

•Low environmental impact coatings based on furan/nanocellulose (CNC) were evaluated.•CNC did not significantly affect the thermal degradation behavior of the furan resin.•Nanocomposites showed excellent interfacial adhesion to aluminum substrate.•CNC enhanced coatings’ mechanical resistance to permanent damage.•Cellulose nanocrystals hindered the furan resin reticulation.