Synthesis and characterization of a novel cellulose-g-poly(acrylic acid-co-acrylamide) superabsorbent composite based on flax yarn waste

► Superabsorbent composite synthesis from textile waste for mass recycling. ► Homogeneous graft copolymerization of cellulose in a low-cost NaOH/urea solution. ► The obtained superabsorbent polymer is amphoteric with excellent salt resistance. ► The obtained superabsorbent composite is biodegradable and environment-friendly.