Functional nanocomposite hydrogels based on cellulose nanocrystals Hydrogels are ubiquitous in nature which are three dimensionally (3D) crosslinked polymer networks with amounts of water inside. Naturally they can be regarded as semi solid showing intermediate properties of solid and liquid. Hydrogels have attracted growing interest in diverse applications due to their excellent biocompatibility permeability and 3D network. With the development of polymer synthesis great progress in tough hydrogels and continuous emerging of advanced fabrication methods hydrogels become promising functional materials. To further broaden their practical usages gre...