▎ 摘　　要

NOVELTY - Preparing high-strength hydrogel involves treating ultrasonically a mixture of carbon and nitrogen containing compounds into a uniform dispersion state. The graphene quantum dot solution is prepared by high temperature hydrothermal treatment. The polymer monomer solution of concentration 1-8 moles/litre is mixed with obtained graphene quantum dot solution, then treated ultrasonically for 10-30 seconds to monomer solution. The obtained monomer solution is added with initiator and crosslinking agent and treated ultrasonically to obtain mixed solution. USE - Method for preparing high-strength hydrogel (claimed). ADVANTAGE - The method enables to prepare high-strength hydrogel, that has excellent mechanical property and fluorescent performance. DETAILED DESCRIPTION - Preparing high-strength hydrogel involves treating ultrasonically a mixture of carbon and nitrogen containing compounds into a uniform dispersion state. The graphene quantum dot solution is prepared by high temperature hydrothermal treatment. The polymer monomer solution of concentration 1-8 moles/litre is mixed with obtained graphene quantum dot solution, then treated ultrasonically for 10-30 seconds to monomer solution. The obtained monomer solution is added with initiator and crosslinking agent and treated ultrasonically to obtain mixed solution. The mixed solution is prepared at low temperature 0-30 degrees C for 30-24 hours to obtain high-strength hydrogel.