The rapid development of nanocellulose and hydrogels has contributed to the development of renewable smart material technologies in recent years. Based on the excellent renewable and biodegradable properties of nanocellulose and the advantages of hydrogels with a high water content, porosity, excellent stretchability and comparable quality to living tissue, nanocellulose hydrogels, which combine the benefits of both, have received significant attention as pioneering materials in the green chemistry revolution. Herein, we present a comprehensive and systematic classification of the nanocellulos...
