CPC C23C 18/1241 (2013.01) [B22F 1/16 (2022.01); C03B 37/01265 (2013.01); C23C 18/04 (2013.01); C23C 18/1216 (2013.01); D01F 1/10 (2013.01); D01F 6/06 (2013.01); G21F 1/106 (2013.01); C03B 2201/34 (2013.01); C03B 2201/40 (2013.01)] | 15 Claims |
1. 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; and
(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.
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