Temperature-sensitive intelligent microcapsule, preparation method thereof and application thereof to oil recovery

The invention belongs to the technical field of oil exploitation, especially relates to a surfactant flooding technology in tertiary oil recovery, in particular to a temperature-sensitive intelligentmicrocapsule, a preparation method thereof and application thereof in the oil recovery, and aims to solve the problem that in the existing surfactant flooding technology, due to large surfactant losscaused by adsorption of rocks and clay, increase in the oil recovery rate is affected. The invention adopts the technical scheme as follows: the temperature-sensitive intelligent microcapsule comprises a microcapsule with a poly(N-hydroxymethyl acrylamide) functional polymer as a membrane capsule wall substrate; temperature-sensitive submicrospheres are embedded in the membrane capsule wall of themicrocapsule; the temperature-sensitive submicrospheres are poly(N-isopropyl acrylamide) or poly(N-isopropyl acrylamide) polymerized with other hydrophilic monomers. The invention further provides amethod for synthesizing the