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The process flow of cellulose hydrogel reinforced with nonwoven cotton: (a) MCC solution preparation at 5 °C; (b) NaOH solution preparation at −6 °C; (c) mixing of NaOH/MCC solution; (d) nonwoven fabric dipped in MCC hydrogel; (e) sample dip in TiO2 solution; (f) cellulose hydrogel-reinforced with nonwoven cotton fabric.
