Slow-release cellulose-cuprous oxide antifouling agent as well as preparation method and application thereof

The invention discloses a slow-release cellulose-cuprous oxide antifouling agent and a preparation method and application thereof, and the preparation method of the antifouling agent comprises the following steps: (1) adding ascorbic acid and polyvinylpyrrolidone into a copper sulfate solution, and uniformly stirring to obtain a solution A; (2) adding cellulose into the solution A, and oscillating and adsorbing to be balanced to obtain dispersion liquid B; (3) dropwise adding a sodium hydroxide solution into the dispersion liquid B at a certain flow rate while stirring, and reacting until the solution completely becomes red yellow; performing centrifugal separation to obtain a solid product; and (4) washing the solid product to be neutral, and drying to obtain the product. The antifouling agent disclosed by the invention can realize exchange of copper ions and sodium ions under the action of seawater, so that slow release of the copper ions is realized; the copper ion release process is slow and stable, the a