Hydrophobic crosslinking monomer, thickening agent for fracturing fluid and preparation method and application of thickening agent

The invention belongs to the field of functional polymers, and particularly relates to a hydrophobic crosslinking monomer, a thickening agent for fracturing fluid and a preparation method and application of the thickening agent. The preparation method comprises the following steps: dissolving alkenyl amide, alkenyl sulfonic acid, a fluorocarbon chain hydrophobic monomer and the hydrophobic cross-linking monomer with the three-dimensional structure in an organic solvent, stirring until the components are dissolved to obtain a liquid-phase reactant, and introducing inert gas to remove dissolved oxygen; and adding an initiator, heating to 44-105 DEG C in an inert gas atmosphere, reacting for 12-36 hours while stirring to obtain a crude product, and precipitating, filtering, washing and drying the crude product to obtain the target product. The thickening agent for fracturing has the characteristics of good tackifying effect, shearing resistance and strong salt resistance. 本发明属于功能高分子领域，具体涉及一种疏水交联单体、压裂液用增稠剂及其制备方法与