US 11,895,921 B2
Manufacturing process for piezoelectric fiber having swiss-roll structure
Yuqing Liu, Jiangsu (CN); Yuting Wang, Jiangsu (CN); Jing Hu, Jiangsu (CN); Xin Yang, Jiangsu (CN); Ranran Li, Jiangsu (CN); and Jian Fang, Jiangsu (CN)
Assigned to NANTONG TEXTILE & SILK IND TECH RES INST, Jiangsu (CN); and SOOCHOW UNIVERSITY, Jiangsu (CN)
Appl. No. 18/013,683
Filed by NANTONG TEXTILE & SILK IND TECH RES INST, Jiangsu (CN); and SOOCHOW UNIVERSITY, Jiangsu (CN)
PCT Filed Jun. 25, 2021, PCT No. PCT/CN2021/102412
§ 371(c)(1), (2) Date Dec. 29, 2022,
PCT Pub. No. WO2022/041995, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 202010869980.4 (CN), filed on Aug. 26, 2020.
Prior Publication US 2023/0232719 A1, Jul. 20, 2023
Int. Cl. H10N 30/08 (2023.01); H10N 30/50 (2023.01); H10N 30/057 (2023.01); H10N 30/87 (2023.01)
CPC H10N 30/08 (2023.02) [H10N 30/057 (2023.02); H10N 30/506 (2023.02); H10N 30/877 (2023.02); Y10T 29/42 (2015.01)] 10 Claims
OG exemplary drawing
 
1. A preparation method for a piezoelectric fiber, comprising a piezoelectric functional layer and an insulating layer coated on the piezoelectric functional layer; wherein, the piezoelectric functional layer comprises a piezoelectric composite layer of a spiral winding structure, the piezoelectric composite layer is wound into more than five turns attached to one another from a center of the spiral winding structure to an outer side, and the piezoelectric composite layer comprises a first piezoelectric layer, a conductive layer and a second piezoelectric layer that are sequentially stacked, further wherein a material of the conductive layer is selected from the group consisting of carbon-supported polyethylene, carbon-impregnated low-density polyethylene, and graphene; the preparation method comprising:
(1) stacking the first piezoelectric layer, the conductive layer and the second piezoelectric layer in sequence, and then respectively softening the first piezoelectric layer and the second piezoelectric layer in a heated state and attaching them to the conductive layer to prepare the piezoelectric composite layer;
(2) taking one end of the piezoelectric composite layer as a winding axis, winding the piezoelectric composite layer in a direction perpendicular to the winding axis to form the piezoelectric functional layer, wherein turns of winding the piezoelectric composite layer are greater than five, coating the piezoelectric functional layer with the insulating layer, and vacuum heating to consolidate, to prepare a preform rod; and
(3) thermal stretching on the preform rod to prepare the piezoelectric fiber.