Preparation method of high-strength high-swelling nanocellulose and polyving akohol composite hydrogel

The invention discloses a preparation method of high-strength high-swelling nanocellulose and polyving akohol composite hydrogel. The method comprises the following steps that nanocellulose suspension is added in dimethyl sulfoxide solvent, and magnetic stirring is conducted to prepare mixed dispersion liquid; polyving akohol is added, and magnetic stirring is conducted for 3 h on the condition that the temperature is 95 DEG C; standing is conducted for 30 min at the constant temperature of 60 DEG C, the dispersion liquid is placed at the constant temperature after being frozen at low temperature, and freezing and thawing circulation is conducted for 5-8 times; obtained hydrogel is put in deionized water to swap out the dimethyl sulfoxide solvent in the gel, and the nanocellulose and polyving akohol composite gel is obtained. According to the preparation method of the high-strength high-swelling nanocellulose and polyving akohol composite hydrogel, reactions are physical reactions, and pollution to the environment in the preparation process is extremely low; by means of a mixed solvent system of dimethyl sulfoxide and water, formation of a uniform network structure of the nanocellulose and polyving akohol gel can be effectively facilitated, the formed three-dimensional interpenetrating network structure can effectively improve the strength and the swelling degree of the gel, the dimethyl sulfoxide can be directly swapped out from the gel after the reaction is completed, and the obtained biomass gel is free of toxicity and pollution.