Preparation method for tungsten/gadolinium oxide functional fiber having core-shell structure for x and gamma ray protection

A preparation method for a core-shell structured tungsten/gadolinium oxide functional fiber for X and γ ray protection, comprising the following steps:

• (1) preparing a dopamine salt solution, adding a buffer to adjust the pH value, then adding tungsten powder, and stirring, filtering, washing and drying, to obtain W@PDA;
• (2) adding the W@PDA obtained in the step (1) into a gadolinium nitrate solution, and stirring, filtering, and high-temperature calcining, to obtain a core-shell structured W@Gd2O3 powder;
• (3) adding the core-shell structured W@Gd2O3 powder obtained in the step (2) and a dried PP masterbatch sequentially into a feed port of a screw extruder to obtain a core-shell structured W@Gd2O3/PP blended melt, which is cooled in air and brittle fractured and granulated, to obtain dried blended particles;
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• (4) adding the dried blended particles obtained in the step (3) into a feed port of a screw extruder, and passing the extruded melt through a drawing and winding device and stretching the same to form a composite fiber.