Preparation method and application of strip-shaped nano barium sulfate

The invention discloses a preparation method and application of strip-shaped nano barium sulfate, and the preparation method comprises the following steps: S0, adding 0.05-0.6 part by mass of EDTA-2Na and 0.05-0.2 part by mass of phosphate into 10-30 parts by mass of barium sulfide slurry, fully and uniformly mixing to obtain a pre-reaction mixture, S1, preparing 3-8 parts by mass of a sodium sulfate solution with the concentration of 3-8 wt% (in parts by mass), and stirring uniformly to obtain a pre-reaction mixture; s2, 0.05-0.7 part by mass of EDTA-2Na and 0.01-0.05 part by mass of sodium octadecyl sulfonate or sodium octadecyl sulfate are added into 500-1000 parts by mass of water to prepare a bottom water mixture, S3, the pre-reaction mixture and a sulfuric acid solution are added into the bottom water mixture, S4, the mixture in the S3 is stirred for full reaction, a post-reaction mixture is obtained, and the pre-reaction mixture is obtained. And S5, filtering, washing and drying the reacted mixture to