Nano-fibril-containing hydrogel based on modified cassava starch and preparation method of nano-fibril-containing hydrogel

The invention provides a modified cassava starch-based hydrogel containing nanofibrils and a preparation method thereof, and belongs to the technical field of polymer functional materials. According to the invention, the cassava starch is modified, so that the modified cassava starch-based hydrogel containing the nano fibrils is prepared. The cassava starch is used as a basic framework, the polyvinyl alcohol is used as a soft segment, the nano fibril is used as a reinforcing material, and the hydrogel synthesized under the crosslinking action of the epichlorohydrin has relatively strong mechanical properties. The nanofibrils are wound with the starch to form a hydrogel support, and the nanofibrils enter the hydrogel to fill a three-dimensional net-shaped hole structure in the hydrogel, so that the mechanical property of the hydrogel is greatly improved, and the thermal stability of the hydrogel is improved. Meanwhile, hydrophilic groups on the surfaces of the nanofibrils can further improve the swelling prope