US 12,258,688 B2
Electronic-ink-based colorful patterned color-changing fabrics and preparation methods thereof
Chaoyi Yin, Nanjing (CN); Ruifang Liu, Nanjing (CN); and Long Ba, Nanjing (CN)
Assigned to SOUTHEAST UNIVERSITY, Nanjing (CN)
Appl. No. 18/726,407
Filed by SOUTHEAST UNIVERSITY, Jiangsu (CN)
PCT Filed Nov. 3, 2021, PCT No. PCT/CN2021/128284
§ 371(c)(1), (2) Date Jul. 3, 2024,
PCT Pub. No. WO2023/070699, PCT Pub. Date May 4, 2023.
Claims priority of application No. 202111282361.6 (CN), filed on Nov. 1, 2021.
Prior Publication US 2024/0417894 A1, Dec. 19, 2024
Int. Cl. D03D 1/00 (2006.01); D03D 11/00 (2006.01); D03D 15/533 (2021.01); D04B 21/08 (2006.01); D03D 15/67 (2021.01)
CPC D03D 1/0088 (2013.01) [D03D 1/0047 (2013.01); D03D 1/0094 (2013.01); D03D 11/00 (2013.01); D03D 15/533 (2021.01); D04B 21/08 (2013.01); D10B 2403/02421 (2013.01); D10B 2403/02431 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for preparing an electronic-ink-based colorful patterned color-changing fabric,
the electronic-ink-based colorful patterned color-changing fabric including a conductive fabric microstrip formed by weaving using conductive yarn and insulating yarn, the conductive yarn forming a conductive region, the insulating yarn forming an insulating region, an electronic ink microencapsule layer being arranged on the conductive region for image display, the electronic ink microencapsule layer including an electronic ink microencapsule slurry and an adhesive, a flexible transparent conductive layer being arranged on the electronic ink microencapsule layer for providing an electrophoretic color rendering voltage, the flexible transparent conductive layer including a single-walled carbon nanotube and a silver nanowire slurry, a transparent polymer layer being arranged on the conductive fabric microstrip for encapsulation, wherein the method comprises:
step 1, weaving the conductive yarn and the insulating yarn into the conductive fabric microstrip using a double-layer warp knitting process, the conductive yarn and the insulating yarn constructing the conductive region and the insulating region, respectively, on the fabric microstrip;
step 2, uniformly coating the electronic ink microencapsule slurry mixed with the adhesive to the conductive region and forming the electronic ink microencapsule layer after curing;
step 3, coating the silver nanowire slurry on a surface of the electronic ink microencapsule layer and drying, coating a single-walled carbon nanotube aqueous solution on the dried surface of the electronic ink microencapsule layer to form the flexible transparent conductive layer after being blow-dried, and sewing the conductive yarn in a direction perpendicular to a length of the conductive fabric microstrip, so that the conductive yarn conduct with the flexible transparent conductive layer and are fixed to the conductive fabric microstrip;
step 4, cutting and disconnecting the conductive region with a low-energy Yttrium Aluminum Garnet (YAG) laser to form independent display pixels;
step 5, uniformly coating a transparent polymer slurry on a surface of the conductive fabric microstrip to form the transparent polymer layer;
step 6, applying a voltage output from a drive circuit to the conductive region and the flexible transparent conductive layer respectively to flip color rendering of a discrete single pixel for by electrophoresis; and
step 7, weaving or splicing the conductive fabric microstrip into a dynamic color rendering module with a fixed pixel density or a fixed size, and splicing a plurality of modules together to form a display device expandable to any size; and modulating, by a pixel selection chip, a voltage of the dynamic color rendering module through a gate voltage control drive circuit to display a simulated environment fusion pattern on the dynamic color rendering module.