公开(公告)号：US11964461B2

公开(公告)日：2024-04-23

申请号：US17631267

申请日：2020-06-03

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Bingtao Tang ,  Fantao Meng ,  Suli Wu ,  Shufen Zhang

IPC: B32B7/05 ,  B32B27/08 ,  B32B27/30 ,  B32B27/40 ,  B32B37/00

CPC classification number: B32B7/05 ,  B32B27/08 ,  B32B37/0076 ,  B32B27/304 ,  B32B27/40 ,  B32B2250/24 ,  B32B2250/40 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2274/00 ,  B32B2307/412 ,  B32B2327/06 ,  B32B2375/00

Abstract: A structurally stable composite structural chromogenic material and a preparation method thereof are provided. The structurally stable composite structural chromogenic material is formed by stacking a transparent thermoplastic polymer and a structural chromogenic material layer by layer and then thermally bonding the peripheral edges of the polymer into a whole, and the upper surface layer and the lower surface layer of the material are both thermoplastic polymers. The molded composite structure has relatively obvious structural color and good mechanical strength.

公开(公告)号：US12286494B2

公开(公告)日：2025-04-29

申请号：US17938110

申请日：2022-10-05

Applicant: Dalian University of Technology

Inventor： Shufen Zhang ,  Changtong Zhou ,  Wenbin Niu ,  Wei Ma ,  Bingtao Tang ,  Suli Wu

IPC: C08F222/10

Abstract: A double-inverse opal photonic crystal resin film is formed by embedding nanospheres in pores of polyacrylate inverse opal framework material and then filling the pores of the double-inverse opal photonic crystal resin film with an ethanol solution with hydrophilic acrylamide dissolved therein followed by photopolymerization to form a polyacrylamide network, so as to obtain the double-inverse opal photonic crystal resin film using water as ink. A mass fraction of hydrophilic acrylamide in the ethanol solution is 2 to 8 wt. %. The resin film can induce water to penetrate into the pores of the double-inverse opal photonic crystal resin film, making the nanospheres in the pores of the inverse opal framework distribute from random to order under the action of buoyancy force, thereby eliminating scattering interference and producing brilliant structural colors by regulating refractive index contrast.

公开(公告)号：US11091661B2

公开(公告)日：2021-08-17

申请号：US16494665

申请日：2018-03-14

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Suli Wu ,  Jie Chang ,  Baoqi Liu ,  Shufen Zhang

IPC: C09D11/322 ,  B41M5/00 ,  C09D11/033 ,  C09D11/037 ,  C09D11/106 ,  C09D11/38 ,  D21H19/38 ,  D21H19/60 ,  D21H21/48 ,  D21H23/50 ,  B41J2/21

Abstract: A method for preparing a large-area structural chromogenic pattern by ink-jet printing, a structural chromogenic pattern obtained by the method, and an anti-counterfeiting method based on a structural color change. A dispersion liquid containing mono-disperse colloidal microspheres with high index of refraction is printed onto a piece of paper by using an ink-jet printer, and nano-microspheres are arranged and assembled on the paper to obtain a micro-structure having the features of being ordered from a short distance and disordered from a long distance. A pretty structural color can be observed by means of the interaction of the structure with light, thus displaying a pattern, changing the angle of observation, changing the brightness of the structural color, and hiding and displaying the pattern. The method is simple and convenient, is widely applicable, and can achieve the preparation and anti-counterfeiting of a large-area structural color without external stimulation.

公开(公告)号：US12242048B2

公开(公告)日：2025-03-04

申请号：US17756714

申请日：2020-09-08

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shufen Zhang ,  Yong Qi ,  Wenbin Niu ,  Suli Wu ,  Wei Ma ,  Bingtao Tang

IPC: G02B26/00 ,  C08F222/10 ,  C08J5/18 ,  G02B1/00

Abstract: A bilayer photonic crystal photoswitch thin-film device having the optical characteristics of both 2D and 3D photonic crystals, and a preparation method thereof are provided. When the bilayer photonic crystal photoswitch thin-film device is rotated periodically, different colors can be observed at a fixed rotation angle, that is, the device has the attribute of changing colors by means of rotation, and can thus realize the opening and closing of an optical path. The bilayer photonic crystal photoswitch thin-film new device has broad application prospects in the fields of photoswitches, optical waveguides, optical prisms, warming signs, anti-counterfeiting and information coding, etc.