▎ 摘　　要

NOVELTY - A hydrogel microsphere comprises 3-8 pts. wt. hydrogel monomer, 0.001-0.050 pt. wt. cellulose or its derivatives, 0.05-0.50 pt. wt. cross-linking agent, 0-0.5 pt. wt. initiator and 10-40 pts. wt. deionized water. USE - Hydrogel microsphere used for preparing graphene oxide-coated hydrogel microsphere for preparation of composite materials with high compressive strength (all claimed). ADVANTAGE - The hydrogel microspheres have excellent compression performance and anti-water loss performance, and have broad application prospects. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) A preparation of the hydrogel microspheres, which involves (1) mixing the raw materials uniformly to obtain a precursor solution, and (2) dropping the precursor solution into the oil; (2) A method for preparing the graphene oxide coated hydrogel microspheres, which involves adding graphene oxide into liquid paraffin, vigorously stirring to form a dispersion, adding hydrogel microspheres, and continuing to stir. The graphene oxide is monodisperse graphene oxide, and the mass ratio of the graphene oxide to the hydrogel microspheres is (0.01-0.20):1.