38results about How to "Has photochromic properties" patented technology

The present invention provides one kind of hydraotalcite with photochromic characteristic and its preparation process, and belongs to the field of hydraotalcite preparing technology. The hydraotalcite has crystal structure and chemical expression of [(M2+)1-x(M3+)x(OH)2]x+(An-)x/n.mH2O, where x is 0.1-0.33, m=3-6 is interlayer crystallized water molecule number, M2+ expresses bivalent metal ion Ni, Co or Fe, M3+ expresses trivalent metal ion Co, Fe, Al or Ga, and An- is anion nitrate radical, p-nitrobenzoate radical, m-nitrobenzoate radical, p-aminobenzoate radical, p-aminobenzene sulfonate radical or chlorobenzoate radical. The present invention has the advantages of synthesis of hydraotalcite with photochromic characteristic for the first time, simple preparation process, low cost and easy reaction.

The invention discloses a preparation method of an azobenzene-based light energy storage phase change material. The method comprises the following steps that: (1) preparing photoresponse azobenzene molecules: carrying out a reaction on 4-hydroxyazobenzene and 1-bromoalkane by using N, N-dimethylformamide as a solvent under an alkali and iodine-containing catalyst condition to obtain 4-alkoxy azobenzene energy storage molecules; and (2) preparing the azobenzene light energy storage phase change material: carrying out melt blending on the 4-alkoxy azobenzene energy storage molecules prepared inthe step (1) and an organic phase change material, fully stirring the molecules and the organic phase change material to obtain the azobenzene light energy storage phase change material. The phase change point of the phase change material decreases under ultraviolet irradiation, the phase change point of the phase change material rises under visible light irradiation, light response phase change control exists. The azobenzene light energy storage molecules have photochromic performance; the change of the color can indicate the change of an isomerism degree; and based on the corresponding relation, an energy storage state can be monitored, and the utilization efficiency of energy is improved.

The invention discloses organic light-emitting materials with reversible photochromism property. The organic functional materials are a series of spiroindene compounds; when being irradiated with ultraviolet light, the compounds can be photochromic in both solution and solid states, that is to say, a color can be changed from an original color to orange yellow or pink, and the original color of the compounds can be restored after illumination is removed. In addition, the compounds disclosed by the invention have excellent fluorescence properties in the range of visible light wavelengths, the emission wavelengths can be regulated by conjugation modification and substituent modification, and the materials are high in fluorescence quantum yield and high in glow brightness, and can be used inmanufacture of organic light-emitting diode elements.

The invention relates to a photochromic room temperature magnetic semiconductor material and a preparation method thereof. The semiconductor material adopts a Bi2WO6 semiconductor material, the morphology of the semiconductor material adopts a lamellar structure; the lamella thickness is 1 to 5nm. The semiconductor material is formed by regulating a bismuth source and tungstate through a high molecular surfactant in a hydrothermal condition. The semiconductor material has the advantages that the morphology of the semiconductor material adopts a lamellar structure, a lamella adopts an ultrathinnanosheet, and the lamellar structure is beneficial to transferring of illuminated electron between a Bi2O2 lamella and a WO6 lamella, so that spin magnetic moment is produced, and photoinduced magnetism is exhibited. The semiconductor material has photochromic performance at a room temperature, and is high in photochromic rate, and the color can be changed after 5 to 10min of irradiation.

The invention discloses a dysfunctional photoproduced color bleeding compound and synthesizing method and application with stable nitrogen-oxygen free radical and spiral oxazine radical, which is characterized by the following: adopting substituted 9'-hydroxy indole oxazine and stable nitrogen-oxygen free radical as raw material; obtaining the product with structural formul as right formula (R1 is C1-C18 alkyl; R2 is hydrogen, C1-8 alkyl, C1-8 alkoxy, halogen or condensed benzene ring; L is connecting arm - (CH2) m-; m is between 1 and 9).

The invention discloses a CDs/TiO2 film, and a preparation method and an application thereof, and relates to the technical field of CDs/TiO2 films. The problems of poor preparation methods and poor light polarization sensitivity of a carbon-based titanium dioxide composite film are solved. The CDs/TiO2 film comprises a glass substrate, a TiO2 nano-porous layer deposited on the glass substrate, andcarbon dots adsorbed on the TiO2 nano-porous layer or a carbon dot layer deposited on the TiO2 nano-porous layer. The method comprises the following steps: depositing the TiO2 nano-porous layer on the glass substrate by adopting a dip-coating process, preparing a carbon dot solution, and soaking the deposited glass substrate in the carbon dot solution to prepare carbon dots adsorbed on the TiO2 nano-porous layer, or dispensing the carbon dot solution on the deposited glass substrate to prepare the carbon dot layer. The film can be applied to holographic storage, light wavelength indication orlight polarization state indication. The film of the invention has a higher light polarization sensitivity than the traditional carbon-based titanium dioxide composite film, and also has a high flatness and a good transparent effect; and the preparation method has the advantages of simplicity, low cost, and obtaining of the CDs/TiO2 film with good quality.

The invention discloses a triarylethene photochromic material, a method and an application of the triarylethene photochromic material as 3D printing ink; the triarylethene photochromic material is a fast-response triarylethene photochromic material which is light-controllable in real time, good in memory storage function and excellent in erasability, and the triarylethene photochromic material issimple in process, high in yield and easy to purify by the aid of two synthesis methods (Corey-Funchs reaction and Wittig reaction); different functional groups are introduced, so that the photochromic property, the light emitting wavelength and other properties of a final product are adjusted. The triarylethene photochromic material containing the unsaturated polymerizable group derivative is applied to the field of 3D printing, and a photochromic three-dimensional structure with an excellent surface, a microstructure and a complex geometrical shape is obtained through a 3D printing technology. The synthesis method disclosed by the invention is simple in process, the obtained product is easy to purify, triarylethylene has no cis-trans isomerism and can be subjected to a pericyclization reaction under ultraviolet irradiation to form a closed loop structure, the closed loop structure has photochromic property, and the synthesized photochromic material has good stability.

The invention discloses a method for preparing a photochromic PET/PTT alloy. The photochromic PET/PTT alloy comprises, by weight parts, 50-60 parts of PET, 10-30 parts of PTT, 2-5 parts of SMA, 5-6 parts of MBS, 1-5 parts of diatomaceous earth/anti-bacterial compound undergoing surface treatment by a coupling, 1-3 parts of diatomaceous earth/inorganic oxide undergoing surface treatment by a coupling, 1-3 parts of photochromic compound, 0.5-2 parts of nano silica, 0.1-0.5 part of antioxidant and 0.1-1 part of lubricant. By reasonable matching of the photochromic compound, the diatomaceous earth/anti-bacterial compound and the diatomaceous earth/inorganic oxide and through synergistic effects between function additives, the photochromic PET/PTT alloy has excellent anti-bacterial, anti-formaldehyde and deodorization characteristics and photochromic characteristics and meets multifunctional requirements, and the application of the photochromic PET/PTT alloy is further broadened.

The invention relates to photochromic carbon fibers based on inorganic materials and a preparation method thereof, which are characterized in that tungsten trioxide and molybdenum trioxide are made into a nanoscale oxide aqueous dispersion, a polyacrylate/tungsten trioxide/molybdenum trioxide aqueous dispersion composite emulsion is prepared by performing polymerization and emulsification on the nanoscale oxide aqueous dispersion and a vinyl monomer, and then the emulsion is applied to the surface of carbon fibers to obtain the photochromic carbon fibers based on the inorganic materials. The photochromic carbon fibers prepared by the invention turn from light yellow to blue under the irradiation of a 500W xenon lamp as a light source; after being washed 20 times, the carbon fibers keep photochromism unimpaired. The whole preparation process is simple, and causes no pollution to the environment.

The invention discloses a photochromic lyocell fiber and a preparation method thereof. The photochromic lyocell fiber is prepared by mixing a photochromic raw material into a lyocell fiber raw material spinning solution and spinning, wherein the mass ratio of the photochromic raw material to lyocell fiber raw material is 1:25-35; the photochromic raw material is modified photochromic lignin; and the lyocell fiber raw material is cotton pulp. The photochromic lyocell fiber has a good photochromic characteristic and is stable in performance; and the preparation method of the photochromic lyocellfiber is simple and low in cost.

The invention provides a photochromic master batch for a fiber core layer with a skin-core structure. The photochromic master batch is composed of the following components in parts by weight: 0-90 parts of a carrier, 1-30 parts of photochromic powder, 0-20 parts of a dye, 0.5-2.5 parts of a mixture and 0.5-1.5 parts of a dispersing aid, wherein the carrier and a core layer fiber of the skin-core structure fiber are polymers of a same type, and the mixture comprises a heat stabilizer and an antioxidant. The invention further provides a preparation method of the photochromic master batch for thefiber core layer with the skin-core structure. The photochromic master batch disclosed by the invention is suitable for production of skin-core structure fibers, so that a fabric manufactured by thefibers has a photochromic characteristic; besides, as the carrier of the photochromic master batch and the core layer fiber of the sheath-core structure fiber are polymers of the same type, the carrier can have good compatibility with the core layer fiber, the dyeing performance of the core layer fiber is improved thermally, the photochromic material can be effectively prevented from falling off,and the water washing resistance and the wear resistance of the sheath-core structure fiber are improved.

The invention discloses a preparation method and application of a photochromic chain transfer agent. Spiropyrane compounds and trithiocarbonate chain transfer agents are subjected to esterification reaction to synthesize a novel photochromic chain transfer agent. The structure of a compound is shown in a formula I; then by using the compound shown in the formula I as the chain transfer agent, a reversible addition-fragmentation transfer (RAFT) free radical polymerization behavior of styrene is investigated, and a silicon wafer is coated with an obtained polymer with a photochromic property through a spin-coating machine, thus obtaining a polymer film with the photochromic property. According to the preparation method and the application disclosed by the invention, a photochromic group is introduced into an RAFT chain transfer agent structure, the chain transfer agent with the photochromic property is prepared, and living free radical polymerization of monomers such as styrene can be successfully realized, thereby obtaining a functional polymer with the photochromic function, controllable molecular weight and narrower molecular weight distribution. (The formula is shown in the description).

The invention discloses a photochromic ligand, a Re (I) rectangular supramolecular complex as well as a preparation method and an lication thereof. The chemical structural formula of the photochromicligand is shown as L, the chemical structural formula of the Re (I) rectangular supramolecular complex is shown as 1, and the ligand and the Re (I) rectangular supramolecular complex provided by the invention have ultraviolet photochromic performance.

The invention discloses a high-activity photochromic bismuth oxychloride/calcium alginate photocatalytic hydrogel microbead and a preparation method thereof. The bismuth oxychloride/calcium alginate (BOC-CA for short) hydrogel microbead is prepared by a sol-gel method. According to the hydrogel microbead, flaky BiOCl is uniformly loaded on the surface and in an internal network structure of the CA hydrogel microbead, the diameter is 6-7 mm, the sphericity degree reaches 98.3%, and the average water content is 95.2%. The BOC-CA hydrogel microbead has better ultraviolet light catalytic response, photochromic property and capability of recycling and cyclically degrading rhodamine B (RhB), can achieve the effect of completely degrading RhB within 75 minutes under the condition of ultraviolet light irradiation, and shows the trend of performance enhancement after being cyclically degraded for multiple times. The microbead becomes black from white under ultraviolet irradiation, and the color of the microbead can be recovered to an initial state after standing for a period of time. The method for fixing the BiOCl photocatalyst by using the gel microbeads provides a practical and effective way for solving the problem of recovery of a powder photocatalyst material.