▎ 摘　　要

NOVELTY - Physical-chemical double cross-linked gel particle is obtained by polymerization and cross-linking reaction of raw materials comprises 13-20 wt.% acrylamide, 2-5 wt.% heat-sensitive monomer, 2-5 wt.% salt-sensitive monomer, 0.001-0.01 wt.% functionalized graphene oxide, 0.001-0.005 wt.% initiator, 0.1-0.5 wt.% cross-linking agent, rest is water, sum of the above components is 100%. The salt-sensitive monomer is methacrylic acid chloride modified alkylphenol polyoxyethylene ether or methacrylic acid chloride modified alkyl alcohol polyoxyethylene ether. The length of the alkyl chain is 7-12, and degree of polymerization of the polyoxyethylene chain is 10-40. The functionalized graphene oxide is gama-methacryloxypropyltrimethoxysilane modified graphene oxide. USE - Physical-chemical double cross-linked gel particle. ADVANTAGE - The physical-chemical double cross-linked gel particle increases the cross-linking density, enhances the elasticity of the gel particles, improves strength of the gel particles, long-term stability under high temperature and high salt conditions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing physical-chemical double cross-linked gel particles, which involves: (A) adding acrylamide, heat-sensitive monomer, salt-sensitive monomer and functionalized graphene oxide in water, ultrasounding until solution is uniform, pouring nitrogen into solution to remove oxygen in the solution, and then adding initiator and crosslinking agent, pouring nitrogen into the solution to remove oxygen, then increasing the temperature to 30-50 degrees C for reaction, keeping for 2-5 hours to obtain gel mass, granulating, drying; and (B) pulverizing the gel to obtain physical-chemical double cross-linked gel particles.