keywords CELLULOSE NANOCRYSTALS DOUBLE-NETWORK HYDROGELS DRUG-DELIVERY GLYCOL METHACRYLATE)-BASED HYDROGELS Materials Science Materials Science, Multidisciplinary NANOCOMPOSITE HYDROGELS POLY(ETHYLENE GLYCOL) POLYSACCHARIDE HYDROGELS PRECURSOR POLYMERS Physical Sciences Polymer Science RATIONAL DESIGN SUSTAINED-RELEASE Science & Technology Technology cellulose nanocrystals double/interpenetrating networks hydrogel concentration/functionalization injectable hydrogels mechanical reinforcement nanoparticle/nanofiber composite hydrogels