110 results about "Spiropyran" patented technology

The present invention relates to a preparation method of an intelligent self-repairing, flame-retardant and light-resistant water-based polyurethane coating. The method comprises the following steps: preparing a self-made hyperbranched flame retardant and using it in the synthesis of a polyurethane prepolymer; cooling the mixture to 58° C., adding 2,2-dimethylolpropionic acid, reacting the mixture for 1 to 2 hours, adding 1 to 2 parts of a disulfide compound, reacting the mixture for 1 to 2 hours at 60 to 80° C., adding 1 to 2 parts of a hydrogen bonding agent, reacting the mixture for 1 hour at 60 to 80° C., adding 0.5 to 1.5 parts of a coumarin derivative, and reacting the mixture for 60 to 90° C. The mixture was stirred for 1-2 hours, and then spiropyran, diethanol monoisopropanolamine, and 0.01 parts of p-toluenesulfonamide were added, and the mixture was reacted at 50°C for 30 minutes. The temperature was lowered to 40-45°C, and 1-2 parts of triethylamine were added, and the mixture was reacted for 1-2 hours. The mixture was cooled to room temperature, and 60-65 parts of water were added. The mixture was stirred at a speed of 1800-2000 r / min for 0.5-1 hour to obtain an intelligent self-healing, flame-retardant, and light-resistant water-based polyurethane coating. The flame retardancy and self-healing properties of the obtained water-based polyurethane were significantly improved.

The invention discloses an antibacterial material rich in a bismuth metal organic framework and a preparation method thereof, the method comprises the following steps: adding an indole monomer and an alcohol monomer into a solvent, and then adding nitrosalicylaldehyde into the solvent to obtain a spiropyran compound; the preparation method comprises the following steps: adding humic acid into a binary solvent consisting of dioxane and butanol to obtain a mixed solution; the ratio of the mass of the humic acid to the volume of the binary solvent is (2-3): (20-40) g / ml; sequentially adding a bismuth source, 2-bromo-5-(trifluoromethyl) pyridine and 4-(trifluoromethyl) phenylboronic acid into the mixed solution to obtain a bismuth metal organic framework; and adding the spiropyran compound into the bismuth metal organic framework to obtain the antibacterial material rich in the bismuth metal organic framework. The antibacterial capability of the antibacterial material is improved.

The invention discloses a rare earth metal polymer with multiple stimulation responsiveness and a preparation method thereof, two monomers SP and VTPY are mixed with methyl methacrylate (MMA) according to a certain proportion, a polymer skeleton Poly (VTPY-co-SP-co-MMA) is prepared through a free radical polymerization reaction, the polymer and Tb (Com) 3.2 H2O are further subjected to a coordination reaction according to a specific proportion, and the rare earth metal polymer with multiple stimulation responsiveness is obtained. The Poly-Tb (Coum) 3 with the stimuli-responsive discoloration characteristic is prepared by the aid of the method. The rare earth metal polymer with methyl methacrylate as a framework and rare earth terbium ions and spiropyran monomers as double emission centers is synthesized, has multiple stimulation response characteristics, provides a brand new strategy and possibility for development of rare earth-based multifunctional intelligent materials, and has wide application prospects. An innovative solution is provided for development of a thermal enhanced rare earth luminescent material, the thermosensitive fluorescence response performance of the material is greatly improved, and a new thought is provided for design of an intelligent temperature response type rare earth luminescent material.

The present invention discloses a light-responsive Pickering emulsion that is synergistically stabilized by a spiropyran ionic liquid and UiO-66-NH2. The Pickering emulsion comprises an oil-water phase, and its stabilizer is a spiropyran ionic liquid and a metal-organic framework material UiO-66-NH2. The stable Pickering emulsion can undergo demulsification under additional visible light irradiation. When further irradiated with ultraviolet light, the system can be re-emulsified to form a stable Pickering emulsion. The Pickering emulsion provided by the present invention can be used for the Click reaction of hydrophilic azide compounds and terminal alkynyl compounds. Through reversible visible light and ultraviolet light regulation, the catalyst and spiropyran ionic liquid can be recycled, and the Pickering emulsion has application value in the fields of controlled drug release and sustainable catalysis.

The invention belongs to the technical field of agricultural products, and provides an agricultural film filler, a double-layer agricultural functional film and a preparation method of the double-layer agricultural functional film, and the agricultural film filler comprises the following components in parts by mass: 15-20 parts of modified silicon dioxide and 25-28 parts of a photochromic material. Silicon dioxide is subjected to carboxylation modification, carboxyl is a hydrophilic group, silicon dioxide has hydrophilicity, the modified silicon dioxide is added into the agricultural film, the hydrophilicity of the film can be improved, fog drops on the top in the agricultural film can rapidly flow down, the light transmittance of the agricultural film is kept, and meanwhile yellow leaves and epidemic diseases caused by the fact that water drops drip on seedlings are avoided. Spiropyrane and carboxyl carbon nanotubes are subjected to esterification reaction, spiropyrane and the carbon nanotubes are combined, the dispersion degree of the material is improved, and unreacted carboxyl also exists on the surfaces of the carbon nanotubes, so that the carbon nanotubes also have hydrophilicity.

Provided herein are sulfonate-based water-soluble photoswitches that, in contrast to existing systems, trigger a volumetric expansion in hydrogels upon exposure to photons; contraction is in turn observed under dark conditions in a highly reversible manner.

The invention discloses a method for applying photoswitch fluorescent polymers to dynamic fluorescent falsification prevention, which comprises the following steps: taking methyl acrylate, 1, 6-hexanediol diacrylate, a photoinitiator 819, a green fluorescent dye BDPMA and one of three photochromic spiropyrans SPMA, SPAMA and SPBMA as raw materials, and preparing three photoswitch fluorescent polymers P1, P2 and P3 in a photopolymerization manner. The P1, P2 and P3 are irradiated by ultraviolet light and placed in room-temperature darkness, red fluorescence generated by the P1, P2 and P3 can be gradually and spontaneously converted into green fluorescence, due to the structural difference of the three spiropyrans, the fluorescence discoloration rates of the three polymers show obvious difference, and a new dynamic fluorescent anti-counterfeit label is constructed by utilizing the difference. The photoswitch fluorescent polymer obtained by the invention has the advantages of simple preparation method, stable structure and good machinability, is suitable for amplification synthesis and practical application, and has wide application prospects in the fields of optical anti-counterfeiting and information encryption.

The invention relates to a polysiloxane self-migration induced multi-stimulus response and programmable gradient hydrogel as well as a preparation method and application thereof. The invention relates to a hydrogel driver, and particularly discloses a polysiloxane self-migration induced gradient hydrogel driver which is quick in response, reusable, better in tensile property, multi-stimulation response and programmable in complex deformation capability. The preparation method comprises the following steps: putting a polysiloxane cross-linking agent, a temperature-sensitive monomer, spiropyrane coordinated up-conversion nanoparticles, a photoinitiator and a cosolvent in different formulas into a polytetrafluoroethylene mold, and carrying out one-step green LED polymerization to prepare the gradient hydrogel. The polysiloxane cross-linking agent is utilized to effectively promote autonomous formation of composition gradient and structure gradient in the hydrogel, and shrinkage stress change from top to bottom is caused. The hydrogel driver disclosed by the invention has the capabilities of rapid driving, reversible circulation, multiple stimulation response and programmable complex deformation, and has a wide application prospect.

The invention provides powder with reversible photochromic performance as well as a preparation method and application thereof, and the powder with reversible photochromic performance is a photochromic microcapsule and consists of a core material and a wall material, the core material accounts for 30%-50% of the total weight of the microcapsule, and the wall material accounts for 50%-70% of the total weight of the microcapsule; the core material is an indoline spiroheterocyclic compound, and the wall material is a biocompatible polymer. The core material is an indoline spiroheterocyclic compound, and the wall material is a biocompatible polymer; the powder is prepared by taking indoline spiropyran as a photochromic core material through a microcapsule coating process, has reversible response characteristics of developing under ultraviolet irradiation and decolorizing under strong light irradiation, and can be compounded with a tattooing pigment matrix to obtain a tattooing product with active developing and decolorizing regulation and control functions. The problem that the photochromic tattoo pigment is irreversible in color change is solved, and meanwhile the photochromic tattoo pigment has good stability and biocompatibility.

The present application relates to a kind of spiropyran derivatives, color-changing glass paint and its preparation method and application.The spiropyran derivative, characterized in that, with as shown in formula (I) structure: formula (I);In formula (I), R1, R2, R3, R4, R5 Or R6 Independently be H, OCH3 Or the specific substituent group on the specific benzene ring of this spiropyran derivative, by its skeleton and specific substituent group cooperation, can realize the color change under light condition;With the spiropyran derivative as photochromic powder, be applied in color-changing glass paint, can make color-changing glass paint color change under light condition, not only can make the light transmittance of color-changing glass paint after color change lower, and after aging treatment, still can make color-changing glass paint keep lower light transmittance, and durability is good.

The present disclosure relates to a biomaterial-based vitrimer composite material that can be recycled and reprocessed and has self-healing and stress-responsive properties, and a method for manufacturing same. Specifically, the vitrimer composite material according to the present disclosure can exhibit excellent self-healing, reprocessing, and recycling characteristics of the biomaterial-based vitrimer while continuously exhibiting stress-responsive characteristics of spiropyran.

The application discloses a spiropyran derivative with color and fluorescence dual switch, a photochromic material and a preparation method and application thereof, the spiropyran derivative is a compound with a chemical structure general formula (1); and further discloses a photochromic material prepared by mixing the spiropyran derivative with an epoxy resin and a preparation method thereof. The aromatic fluorescent group is introduced into the side group of the spiropyran material, the conjugated system of the fluorescent group itself is large, and thus the fluorescence emission intensity after the spiropyran is opened is increased. The compound shows good photochromic and photoluminescent effects in organic solvents and solid media; the fluorescent group and the spiropyran material are combined, and a molecular switch material with significant color and fluorescence changes can be prepared; the spiropyran derivative can be used for preparing a two-dimensional optical display device and an intelligent material molecular switch.

The invention discloses a preparation method of a light response type UV regulation and control material and a 3A optical film, and relates to the technical field of optical films.The preparation method comprises the steps that spiropyrane is dissolved in ethyl acetate to form an oil phase, and first liquid is obtained; dispersing nano silicon dioxide in a water phase containing gelatin to obtain a second liquid; stirring and mixing the first liquid and the second liquid to form an emulsion; evaporating the emulsion at 55-65 DEG C for at least 12 hours to form a spiropyrane-silicon dioxide hybrid nanocapsule; the spiropyrane-silicon dioxide hybrid nanocapsule is dispersed into light-cured polyacrylate, and a light response type UV regulation and control material is obtained; the 3A optical film comprises a light response type UV regulation and control layer, and the material of the light response type UV regulation and control layer is a light response type UV regulation and control material. The 3A optical film realizes flexible regulation and control of absorption of ultraviolet rays according to different weather scenes.

The present invention discloses a dynamic luminescent system of light-controlled dissipative self-assembly, a preparation method, a reversible logic gate and its application. The system comprises a sulfonic acid merocyanine that self-assembles with a surfactant in acidic water to form a light-controlled dissipative self-assembly system, and then a fluorescent dye is added to obtain the system. The sulfonic acid merocyanine can be photoisomerized to a spiropyran structure at 420±10nm, and then assembled with a surfactant in an acidic aqueous solution at room temperature into a spherical nanoparticle system. At the same time, the assembly system can achieve different dynamic changes in fluorescence by loading different fluorescent dyes. On this basis, a series of reversible logic signal gates that achieve dynamic changes in fluorescence based on different inputs have been developed. The preparation routes of the various light-controlled dissipative self-assembly systems are simple, and the dynamic changes in fluorescence can be achieved by simply changing the self-assembly system or changing the wavelength of the excitation light. This can be used as the design basis for logic signals, and has great application potential in the fields of information transmission and information storage, such as molecular computing and sensing.

The invention relates to the technical field of nursing products, and discloses a preparation method of a foaming neck pillow with a built-in air bag, the foaming neck pillow with the air bag comprises a foaming body and the air bag; the foaming body is formed by reacting, injecting and foaming a component A and a component B; the component A is prepared from furfurylated polyether polyol, polyethylene glycol, polycaprolactone glycol, a polyurethane catalyst, an organic silicon foam stabilizer and water; and the component B is prepared from polymerized diphenylmethane diisocyanate, isocyanate with a spiropyrane group and isocyanate with a maleimide group. The method comprises the steps that an in-situ foaming technology is adopted, an air bag and a foaming body are integrally bonded and formed through an interface chemical reaction, and the air bag is prepared through mixing, foaming, curing and post-curing. The neck pillow has interface bonding strength, and delamination is avoided; the product integrates thermally induced shape memory and phase change temperature sensing adjusting functions; and by utilizing the reversibility of the Diels-Alder reaction, the material also has a self-repairing capability, so that the comprehensive performance and durability of the product are improved.

The invention provides a development method of a large conjugated system spiropyrane photochromic material, which successfully introduces naphthalene and benzofuran units into a spiropyrane molecular skeleton through screening and optimization of multi-step organic chemical reaction conditions, and develops a series of large conjugated system spiropyrane photochromic micromolecular materials. Under the irradiation of 365 nm ultraviolet light or natural light, the absorption spectrum of the series of molecular materials can generate obvious red shift, and meanwhile, the free volume of molecules is obviously increased, so that the material can generate obvious photochromic phenomenon in a pure solid state, several large conjugated system spiropyrane materials all turn into blue systems after the irradiation of a light source, and the photochromic effect is good. By means of the development method of the large conjugated system spiropyrane photochromic material, various photochromic materials with the absorption spectrum obviously changed and the molecule free volume obviously increased after ring opening isomerization can be obtained, the photochromic capacity and reversibility of the materials are greatly improved, and regulation and control of the color of the photochromic materials are achieved.

The invention provides a spiropyrane ionic liquid microemulsion for reversible capture of carbon dioxide regulated and controlled by visible light. The microemulsion system can reversibly capture carbon dioxide under irradiation of extra visible light. The micro-emulsion takes water as a polar phase, sec-butyl alcohol as a non-polar phase and photoresponsive spiropyrane ionic liquid as an emulsifier to form a stable pyrane ionic liquid micro-emulsion, so that the micro-emulsion liquid drops and the spiropyrane ionic liquid can be used for synergistically trapping carbon dioxide, and in a natural environment, the carbon dioxide can be effectively absorbed by the micro-emulsion liquid drops and the spiropyrane ionic liquid. After extra visible light irradiation, a microemulsion system can trigger demulsification to generate phase separation and release carbon dioxide, and then the system is irradiated by ultraviolet light to realize emulsification to form a microemulsion which is repeatedly used for carbon dioxide capture.

The invention discloses a photochromic spiropyrane derivative containing an adamantyl group and a preparation method and application thereof, the photochromic spiropyrane derivative containing the adamantyl group takes 4-dimethylaminopyridine and dicyclohexylcarbodiimide as catalysts, and 2-(3 ', 3'-dimethyl-6-nitro spiro [chromene-2, 2 '-diketone)-1, 2, 4-triazole-2-yl]-1, 3, 4-triazole-2-yl]-1, 3, 4-triazole-2-yl]-1, 3, 4-triazole-2-yl]-1, 3, 4 According to the invention, 2, 2 '-indoline]-1'-yl) ethanol and an adamantane carboxylic acid compound are subjected to an esterification reaction, adamantanoate series large steric hindrance groups are introduced to spiropyrane molecules, a relatively loose accumulation mode of the compound is caused, and pi-pi accumulation of the spiropyrane molecules is effectively prevented, so that a photochromic reaction of spiropyrane in a solid state is realized; the preparation method is simple, post-treatment is convenient, and the prepared photochromic spiropyrane derivative containing the adamantyl group is high in yield and good in fat solubility.

The invention relates to the technical field of air coated yarns, in particular to a photochromic microcapsule and a photochromic composite nylon / spandex air coated yarn, and solves the problem that the traditional nylon / spandex air coated yarn has no photosensitive function by innovating a material system and structural design. Specifically, the synergistic effect of rare earth aluminate noctilucent powder and spiropyrane-titanium dioxide hybrid microcapsules is adopted, and a noctilucent function with certain luminous intensity and afterglow and a certain photochromic characteristic are achieved in the brocade ammonia air coated yarn.

The application belongs to the technical field of polymers, and particularly relates to a polyurethane material and a preparation method and application thereof. The polyurethane material comprises the following components in parts by weight: polycaprolactone diol 10-50 parts, hexamethylene diisocyanate 1-10 parts, catalyst 0.05-0.3 parts, spiro-pyran diol 0.5-5 parts, and crosslinking agent 1-6 parts. The molecular formula of the spiro-pyran diol is shown in the description. The polyurethane material prepared by the application can realize two response functions under a single stimulus, and significantly expands the development potential and application field of the double-way shape memory material.

The invention discloses a photochromic core-shell structure organic metal silicon nano composite material and preparation and application thereof, and the composite material is prepared by the following method: under a heating condition, respectively preparing a platinum (II) complex Pt-AP and a spiropyrane derivative SP-AP; the preparation method comprises the following steps: under a room temperature condition, taking tetraethoxysilane as a silicon dioxide precursor, adding Pt-AP into an alkaline solution of ethanol and water, and reacting to obtain core silicon dioxide nanoparticles Pt-SiO2; and then carrying out resuspension, adding a surfactant, SP-AP and tetraethoxysilane, and carrying out a reaction to obtain the photochromic organic metal silicon nano composite material with the core-shell structure. The preparation process is simple, purification is easy, the obtained photochromic composite material and the nanofiber film have reversible response to ultraviolet light and visible light, and the high-performance and multifunctional dynamic optical encryption effect can be achieved.

The present application relates to the technical field of lens mask, especially to a highway LED transparent lens mask and a preparation method thereof, which comprises the following components by weight: 80-90 parts of poly(methyl methacrylate)-b-poly(glycidyl methacrylate) block copolymer (PMMA-b-PGMA); 0.5-2.0 parts of nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots; 5-10 parts of random ethylene-methyl acrylate-glycidyl methacrylate terpolymer; 1-3 parts of photochromic spiropyran derivative modified silica nanoparticles; and 1-3 parts of hyperbranched fluorinated polyether. The high light transmittance is ensured, and the active sites are provided through the PGMA block, which is conducive to the uniform dispersion and chemical bonding of other functional components. The nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots are introduced to realize efficient ultraviolet blocking and light stability.

This invention relates to the field of functional liquid crystal materials technology, and discloses a method for preparing and applying a spiropyran-based ionic conductive cholesteric phase liquid crystal elastomer with multimodal sensing characteristics. This liquid crystal elastomer is prepared by co-polymerization of a spiropyran derivative as the core unit for photo / thermal / mechanical response with polymerizable liquid crystal monomers, chiral agents, thiol crosslinking agents, ionic liquids, and initiators. Its core mechanism is that the microscopic isomerization of spiropyran molecules is amplified into a change in the mesoscopic polymer arrangement through intermolecular synergistic effects. Simultaneously, relying on the intrinsic conductivity difference between the ionic anthocyanin (MC) and non-ionic spirocyclic (SP) phases, precise control of macroscopic conductivity is achieved. This composite material achieves multiple responses with a single spiropyran component, enabling the construction of multimodal flexible sensors. It addresses the pain points of complex structures and poor compatibility in traditional sensors, and has significant research value in fields such as smart wearables, electronic skin, and healthcare.

The application discloses a visual fluorescent sensor, wherein a support under PMMA is PDMS with a micron-level inverted pyramid structure, and the whole is defined as PDMS / PMMA-Au / SP. The PDMS / PMMA-Au / SP has a structure similar to an insect compound eye, a large specific surface area and low reflectivity, can provide more attachment sites and higher light absorption efficiency for spiropyrans, and helps to improve the fluorescence intensity of the open ring body MC of the spiropyrans. Meanwhile, the electromagnetic field enhancement effect of Au nanoparticles can further improve the fluorescence intensity of the open ring body MC of the spiropyrans. The brand-new PDMS / PMMA-Au / SP fluorescent sensor is successfully applied to trace detection of metal ions.

The application discloses a kind of high impact light-induced discoloration substrate resin formula and its preparation method, it is related to optical resin material technical field, by weight fraction, including the following components: methyl methacrylate 59-65 parts, styrene 29-34.5 parts, carboxyl-containing vinyl monomer 5-10 parts, spiro chromic powder 0.03-0.05 parts, allyl beta-cyclodextrin 1-3 parts, anti-fatigue monomer 2-5 parts, self-repairing monomer 0.1-0.3 parts, N-(4-cyano-3-trifluoromethyl phenyl) methacrylamide 1-3 parts, acrylate-terminated hyperbranched organosilicon modified polyurethane 3-5 parts, cellulose nanocrystal 0.5-1 part, initiator 0.8-1.2 parts.The resin has good impact resistance, good aging resistance, significant photochromic effect, and excellent fatigue resistance.

The invention relates to the technical field of textile fiber preparation, in particular to a preparation method of colorful chitosan-based fluorescent anti-counterfeiting nanofibers. The method comprises the following steps: (1) preparing a spiropyrane (SP) labeled red fluorescent chitosan (CS) solid material SP-CS; (2) preparing a perylene (Perylene) labeled green fluorescent chitosan solid material Perylene-CS (Chlorine Sulfonate); (3) preparing a tetraphenylethylene (TPE) labeled blue fluorescent chitosan (CS) solid material TPE-CS; (4) blending the SP-CS dilute acetic acid solution, the Perylene-CS dilute acetic acid solution, the TPE-CS dilute acetic acid solution and the polyvinyl alcohol (PVA) solution according to different proportions to prepare a spinning solution; and (5) preparing the colorful chitosan-based fluorescent anti-counterfeiting nanofiber through electrostatic spinning. The series of chitosan-based anti-counterfeiting nanofibers prepared by the invention can emit fluorescence in various colors such as orange, yellow, cyan and purple under the excitation of ultraviolet light, the diameter distribution of the fibers is uniform, the surface is smooth, and the average diameter is within the range of 110-150nm.

The invention provides a photochromic multi-point out-of-focus myopia control lens, a preparation method and system thereof, electronic equipment and a medium, and relates to the technical field of intersection of optical devices and additive manufacturing. According to the method, a multi-material ink-jet additive manufacturing process is adopted, a basic optical layer, a composite functional layer (a composite layer of a photochromic functional layer and an optical compensation regulation and control layer) and a distributed out-of-focus microstructure layer are deposited according to preset forming logic, all the functional layers are integrally formed, and interface stress and optical distortion are avoided; wherein the photochromic functional layer contains spiropyrane dye and nano titanium dioxide, rapid response and high weather resistance are achieved, and the optical compensation regulation and control layer has the negative dispersion characteristic and dynamically counteracts focus drift caused by color change. According to the technical scheme of the invention, the problems of out-of-focus structure failure, unstable optical performance and heavy structure caused by refractive index fluctuation in the color changing process of a traditional photochromic lens are solved.

The present invention provides a photochromic dye compound, the chemical structure of which is shown in Formula (X): wherein R1 is selected from NH2, NO3, dimethylamino, hydrogen, or piperidinyl; R2 is selected from alkoxy, carbonyl, alkyl, or hydrogen; R3 is selected from methoxy or hydrogen; R4 is selected from benzyl, vinyl, propenyl, or methacryl; and n represents an integer of 1 to 4. The photochromic dye compound is a compound with naphthopyran as the main structure. The photochromic dye compound is prepared by utilizing a specific structure and groups, and has higher photostability and thermal stability than spiropyran and spirozolinoid photochromics. The photochromic red-green color blindness correction contact lens of the present invention has the function of correcting red-green color blindness; compared to the single function of traditional contact lenses and red-green color blindness correction lenses, it also has the function of reducing light intensity sunglasses and protecting against ultraviolet and blue light.

The application belongs to the technical field of electronic display material processing, and specifically discloses a UV double-curing ink and a preparation method thereof.The UV double-curing ink is composed of UV polyester acrylate, polyurethane acrylate containing a spiropyran group, UV modified epoxy acrylate, POSS-acrylate, a mixed solvent, a photoinitiator, an active amine, a leveling agent, pigments and a dispersing agent.The preparation method mainly comprises the following steps: firstly, the UV polyester acrylate, the polyurethane acrylate containing a spiropyran group, the UV modified epoxy acrylate and the POSS-acrylate are respectively subjected to premixing treatment; then, the other components are sequentially subjected to dispersion treatment and functionalization treatment; finally, the mixture obtained by the treatment is subjected to light-shielding storage to obtain the UV double-curing ink.The UV double-curing ink has good leveling property, wettability and bending stress, has the characteristics of high hardness and high adhesion, and can effectively prevent discoloration.