42results about How to "Wide range of discoloration" patented technology

The invention discloses an organic-inorganic electrode polarized particle, its preparation method and its application in an electrode polarichromic device, comprising the following steps: 1) preparing titanium oxide nanorods; 2) utilizing dye molecules with polymerizable groups Polymerization grafting onto the surface of titania nanorods yields organic-inorganic electrically polarized particles. Specifically, the invention utilizes the surface polymerization reaction of titanium oxide nanorods to graft dye molecules of different colors to realize multi-color organic-inorganic polarized particles and polarized color-changing devices. The organic-inorganic electrode polarized particles of the present invention have the characteristics of simple operation, wide color adjustable range, simple preparation, and easy large-scale preparation; the electrode polarized color-changing device prepared by using it has the advantages of fast response speed and wide color changing range.

The invention relates to a use of a photochromic cadmium sulfide comb-shaped semiconductor micro-nano material and belongs to the technical field of photochromism. The photochromic cadmium sulfide comb-shaped semiconductor micro-nano material can be used as an anti-counterfeit material, a military wave-absorbing material, a decorative material or a biological fluorescent labeling material and can be used for a laser display field, a laser television field, a biological chip field or a laser cryptography field. The invention provides a novel approach for a cadmium sulfide nano-comb doped with tin in color change application. The photochromic cadmium sulfide comb-shaped semiconductor micro-nano material has the characteristics of low cost, simple making method and wide raw material sources. Compared with the existing color-variable material, the photochromic cadmium sulfide comb-shaped semiconductor micro-nano material is obtained more easily, realizes real-time color change, and has more color change choices and wider color change ranges. The photochromic cadmium sulfide comb-shaped semiconductor micro-nano material has wide application prospects in fields of laser display, laser television, anti-counterfeit materials and military wave-absorbing materials.

The invention discloses a prussian blue / tungsten trioxide electrochromic film and a preparation method thereof. The film has a double-array ordered structure and large specific surface area and can increase ordered ion diffusion channels for electrolyte ions and selectively modulate near infrared light bands and visible light bands. The preparation method comprises the steps as follows: firstly, taking a polystyrene template as a working electrode and an aqueous solution of sodium tungstate, hydrogen peroxide and hydrochloric acid as an electrodeposition solution, removing the polystyrene template after electrochemical deposition to obtain a tungsten trioxide electrochromic film with a bowl-like ordered structure, then, taking the obtained tungsten trioxide electrochromic film with the bowl-like ordered structure as a working electrode and an aqueous solution of FeCl3, K3[Fe(CN)]6 and KCl as an electrodeposition solution, and performing electrochemical deposition to obtain the prussianblue / tungsten trioxide electrochromic film. The preparation method requires no roasting and has the advantages that the method is convenient to operate, efficient and energy-saving, the product is controllable and the like.

The invention discloses a preparation method of a series of piezochromic phenyl boron fluoride complexes with different alkyl chain lengths. The preparation method of the complexes comprises followingsteps: (1), a halogen-containing triphenylethylene compound and 4-acetylphenylboronic acid are subjected to a reaction, and tetraphenylethylene monoketone is synthesized; (2), tetraphenylethylene monoketone and esters are subjected to a reaction, and tetraphenylethylene beta-diketone compounds with different alkyl chain lengths are obtained; (3), the synthesized tetraphenylethylene beta-diketonecompounds with different alkyl chain lengths are complexed with boron trifluoride diethyl etherate respectively, and a series of boron fluoride complexes with different alkyl chain lengths are obtained. The boron fluoride complexes have excellent molecular aggregation induced fluorescence effect and excellent characteristics of piezochromism, wider wavelength shift range and the like, a new thinking is provided for researching color change mechanism of the piezochromic material by the aid of the synthesis of the material, and the material is expected to be widely applied in the fields of a brain tumor imaging technology, a near-infrared probe technology, photoelectric devices and the like.

The invention relates to a magnetic photochromic photonic crystal material and a preparation method thereof. The preparation method comprises the three steps of (1) preparing monodisperse silica microsphere colloid; (2) synthesizing a functional metal material; (3) preparing the magnetic photochromic photonic crystal material. The preparation method provided by the invention is simple. The photonic crystal material prepared by the method has a core-shell structure; in the structure, silica microspheres are taken as a core, and metal ions attached to the surfaces of the silica microspheres are taken as a shell. The metal ions have superparamagnetism, so that the photonic crystal material also has magnetic response performance. When an appropriate magnetic field is applied to the photonic crystal material, the volume locations or volumes of metallic particles are changed, so that the cluster lattice structure of photonic crystals changes, the position of a photonic forbidden band changes, and the colors of crystals are accordingly changed. Furthermore, the silica microspheres are uniform in structures and good in dispersity; therefore, the prepared nano photonic crystal material prepared by the method has the advantages of being uniform in crystal structure and rich in structural color.

The invention discloses a gelatinous polymer electrolyte and a preparation method for a solid electrochromism device based on a conductive polymer. The gelatinous polymer electrolyte has the advantages of good environment stability and high ionic conduction. The preparation method for the solid electrochromism device based on the conductive polymer comprises the following steps: using the working electrode deposited by a conductive polymer membrane with electrochromism performance as the positive electrode, uniformly coating the gelatinous polymer electrolyte on the surface of the conductive polymer membrane of the positive electrode material, after an electrolysis solvent A is partially volatilized and becomes thicker, taking a blank conductive substrate with the same material as the negative electrode, packaging and assembling the positive and negative electrode materials by using double faced adhesive tapes, and finally stilly placing the assembled device in the shade place for 1-4 days. The solid device based on the conductive polymer is easy to assemble and prepare, and has the electrochromism performance, so the solid device based on the conductive polymer has large application prospect in the fields, such as the display, the intelligent window, and the electronic paper.

The invention belongs to the technical field of coatings, and specifically relates to a stimulus-responsive color-changing functional coating and its preparation method and application. The invention provides a stimulus-responsive color-changing functional coating, which includes the following preparation raw materials: epoxy resin, furanone pigments, amine curing agents and solvents. In the present invention, the furanone pigments are organic conjugated conductive molecules. The reaction between the amine curing agent and the furanone pigments forms cross-linked molecules containing hydrogen bonds. The cross-linked molecules can react under different environmental stimuli. It shows excellent electronic transition behavior, and the cross-linked molecule is unstable. It can produce electronic transitions with different characteristics through different stimulation conditions, giving the paint color-changing properties, making it have different colors under different environmental stimuli. Experimental results show that the stimulus-responsive color-changing functional coating of the present invention has thermochromic, ultraviolet photochromic and strong acid color-changing properties, with diverse color-changing stimulation conditions and a wide color-changing range.

The invention relates to a cadmium sulfide pectinate semiconductor micro / nano material and a preparation method thereof, belonging to the technical field of photochromism. The preparation method comprises the following steps: putting cadmium sulfide and tin dioxide at the center of a quartz pipe of a pipe furnace, putting a gold-plated silicon wafer as a substrate into upstream or downstream the air flow of the quartz pipe of the pipe furnace, introducing carrier gas, heating, keeping the temperature for 1-3 hours, shutting down the pipe furnace, continuing introducing carrier gas, and cooling to room temperature to obtain the tin-doped cadmium sulfide pectinate micro / nano material. The tin-doped cadmium sulfide pectinate micro / nano material has the new application of color variations, and has the characteristics of low cost, simple preparation process and wide raw material sources. Compared with the existing photochromic material, the cadmium sulfide pectinate semiconductor micro / nano material is easier to implement, can implement color variations in real time, and has more color options, so that the photochromic range is more abundant. The invention can be widely applied to the fields of laser display, laser televisions, anti-counterfeiting materials and military wave-absorbing materials.

The invention relates to a preparation method of fluorescent test paper for rapidly detecting barium ions. Fluorescent probes are used as color-developing inks, and filter paper is used as a solid-phase carrier by an inkjet printer to uniformly print to obtain fluorescent test paper for detecting barium ions; The fluorescent probe is a blue-light carbon dot functionalized with sodium rhodinate. The invention uses the principle of fluorescence quenching to construct blue-light carbon dots for visual detection of barium ions and has the advantage of a wide range of discoloration. As the concentration of the detected substance changes, the color of the fluorescent test paper changes from royal blue to light blue under the irradiation of a hand-held ultraviolet lamp. The color - light purple - light crimson - gray, can be quickly recognized by the naked eye.

The invention discloses a method for preparing a transparent and fast-response flexible electrochromic film, which relates to a method for preparing an electrochromic material. The purpose of the present invention is to solve the problems of expensive equipment for preparing flexible electrochromic films, harsh and tedious test conditions and the problems that the flexible electrochromic films are prone to strain, fracture and separation from the substrate after being stressed. Preparation method: 1. Prepare a clean flexible substrate; 2. Prepare an Ag layer; 3. Prepare a mixed solution B; 4. Prepare H 2 WO 4 ·H 2 O / PEDOT thin films to obtain transparent and fast-response flexible electrochromic films. The transparent fast-response flexible electrochromic film obtained by the invention has good electrical conductivity, short response time, 2s-4s fading time, and 3s-5s coloring time. The invention can obtain a transparent and quick-response flexible electrochromic film.

The invention discloses a method of driving a flexible photonic crystal to change color based on a shape memory alloy polymer. With the shape memory alloy as a base material and a rigid structural member and a silicone rubber as composite materials, a driver is prepared; the flexible photonic crystal is then prepared and placed on the driver, DC is supplied to the driver to achieve deformation, and the flexible photonic crystal generates uniaxial stretching and color changing. The shape memory alloy polymer is used to drive the flexible photonic crystal to change color, the problems of insufficient flexibility and over high voltage of an electrochromic structure can be solved, the method is applicable to color changing occasions with high requirements on shape adaptability and use safety,and has important application potential in fields such as flexible display, anti-counterfeiting treatment, human assistance and smart cities.