	US 11,987,886 B2
	Preparation method for tungsten/gadolinium oxide functional fiber having core-shell structure for x and gamma ray protection
Lirong Yao, Jiangsu (CN); Yong Xia, Jiangsu (CN); Tao Yang, Jiangsu (CN); Tong Sun, Jiangsu (CN); Gangwei Pan, Jiangsu (CN); Sijun Xu, Jiangsu (CN); Tao Ji, Jiangsu (CN); and Qiang Gao, Jiangsu (CN)
Assigned to NANTONG UNIVERSITY, Jiangsu (CN)
Appl. No. 18/276,053
Filed by NANTONG UNIVERSITY, Jiangsu (CN)
PCT Filed Aug. 16, 2021, PCT No. PCT/CN2021/112684 § 371(c)(1), (2) Date Aug. 7, 2023, PCT Pub. No. WO2022/166151, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. 202110179974.0 (CN), filed on Feb. 8, 2021.
Prior Publication US 2024/0093374 A1, Mar. 21, 2024
Int. Cl. C23C 18/12 (2006.01); B22F 1/16 (2022.01); C03B 37/012 (2006.01); C23C 18/04 (2006.01); D01F 1/10 (2006.01); D01F 6/06 (2006.01); G21F 1/10 (2006.01)

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@Gd₂O₃powder;

(3) adding the core-shell structured W@Gd₂O₃powder 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.