公开(公告)号：US20230183407A1

公开(公告)日：2023-06-15

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

CPC classification number: C08F222/1063

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：US20200010703A1

公开(公告)日：2020-01-09

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 ,  C09D11/38 ,  C09D11/037 ,  C09D11/033 ,  C09D11/106 ,  D21H21/48 ,  D21H23/50 ,  D21H19/38 ,  D21H19/60 ,  B41M5/00

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 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：US20240191080A1

公开(公告)日：2024-06-13

申请号：US18546986

申请日：2021-09-02

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shufen ZHANG ,  Lei LI ,  Bingtao TANG ,  Rongwen LV ,  Wei MA ,  Suli WU ,  Wenbin NIU ,  Benzhi JU

IPC: C09B29/00 ,  B01J19/00 ,  B01J19/18

CPC classification number: C09B29/00 ,  B01J19/0066 ,  B01J19/1812 ,  B01J2219/00195

Abstract: A method for producing water-soluble azo dyes by utilizes continuous diazotization reaction and continuous coupling reaction in a pipeline reactor. The diazo component, hydrochloric acid and sodium nitrite are simultaneously fed at the bottom of the pipeline reactor at room temperature, to perform a diazotization reaction in the pipeline and leave the diazotization reaction site in time, followed by performing the coupling reaction with the introduced coupled component. Under stirring of micro stirring blades, the materials at each flow layer are uniformly mixed and reacted, and the reaction materials flow upward under the action of a feed driving force and are discharged from the top of the continuous reactor to produce a water-soluble azo dye.

公开(公告)号：US20220195218A1

公开(公告)日：2022-06-23

申请号：US17594718

申请日：2020-04-28

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Suli WU ,  Yue WU ,  Jie CHANG

IPC: C09D7/40 ,  C09D7/61 ,  C09D7/63 ,  C09D7/45 ,  C09D129/04 ,  C09D1/06 ,  C09D133/08

Abstract: A structural color coating based on Mie scattering of high-refractive index microspheres has the following components in parts by mass: 5 to 20 parts of nano microspheres having a highly uniform particle size and a theoretical refractive index greater than 1.7, 75 to 90 parts of dispersion liquid, 0.1 to 5 parts of a surfactant, and 1 to 5 parts of an adhesive. The structural color coating forms a local microcosmic ordered, macroscopic long-range disordered structural film by means of spraying coating, blade coating, brushing coating, roll coating or dip-coating; the matrix is glass, metal, textile, ceramic, plastic or paper; the surfactant is sodium dodecyl benzene sulfonate, cetyl sodium sulfate, stearic acid, or sodium stearate; the nano microsphere is at least one of ZnS, ZnO, CdS, Cu2O, CaS, CuS, Cu2S, TiO2, ZrO2 or CeO2; the particle size of the nano microspheres ranges from 200 to 500 nm.

公开(公告)号：US20230142236A1

公开(公告)日：2023-05-11

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 ,  B32B37/00

CPC classification number: B32B7/05 ,  B32B27/08 ,  B32B37/0076 ,  B32B27/304

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：US20230003993A1

公开(公告)日：2023-01-05

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.