79 results about "Fluorescent polymer" patented technology

The invention provides wear-resistant fluorescent waterborne polyurethane and a preparation method thereof, and relates to the technical field of novel fluorescent polymer materials. The wear-resistant fluorescent waterborne polyurethane is prepared from the following raw materials in parts by weight: 5 to 15 parts of perylene bisimide modified monomer, 20 to 45 parts of oligomer polyol, 35 to 45 parts of isocyanate, 2 to 7 parts of hydrophilic monomer, 5 to 10 parts of chain extender, 2 to 5 parts of neutralizer and 0.01 to 0.1 part of catalyst, wherein the perylene bisimide modified monomer takes perylene bisimide as a center, the nitrogen end of the perylene bisimide is grafted with a cage type polysilsesquioxane group, and the bay position of the perylene bisimide is modified with a triethylene glycol group. The wear-resistant fluorescent waterborne polyurethane disclosed by the invention has high solid-state fluorescent quantum yield and excellent physical and mechanical properties.

The present invention relates to the technical field of fluorescent polymers, and specifically relates to an anthracene-based fluorescent polymer, a preparation method thereof, and an application thereof. Pure Ar-PIs do not have fluorescence and cannot be directly applied to light-emitting devices. In view of the above problems, the present invention provides an anthracene-based fluorescent polymer. An anthracene-based luminescent group is introduced into the molecular structure of the polyimide. The obtained anthracene-based fluorescent polymer has good solubility in a variety of organic solvents and can be prepared into a fluorescent probe or a fluorescent polymer film with recognition and detection functions, having good application prospects.

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.

This invention discloses a photosensitive supramolecular fluorescent polymer, its preparation method, and its anti-counterfeiting application in water, using trifluoroethyl methacrylate, hexafluorobutyl acrylate, 4-(acryloyloxy)butyl4-(2-methyl-3-(2-(2-methylbenzo[b]thiophen-3-yl)-4-oxo-5,6-2H-4H-thiaran[2,3-)b]thiaran-3-yl)benzo[b]thiophen-6-yl)-4-oxobutyrate, 4 This polymer was prepared by a simple one-step free radical copolymerization method using 1,1-(acryloyloxy)butyl3-(3,3,4,4,5,5-hexafluoro-2-(2-methyl-1,1-dioxide benzo[b]thiophene-3-yl)cyclopent-1-en-1-yl)-2-methylbenzo[b]thiophene-6-carboxylate 1,1-dioxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (photoinitiator-819) as raw materials. The polymer exhibits excellent multicolor light-switching performance, high stretch ratio, high self-healing efficiency, strong substrate adhesion, and antifouling properties, especially demonstrating excellent stability under strong acid, strong alkali, and high salt environments. The synthetic route is simple, and it has great application potential in underwater anti-counterfeiting and encryption technologies.

Polymer dots comprising a functionalized fluorescent polymer and an amphiphilic molecule are provided.

The invention discloses a preparation method of a recyclable orthogonal dynamic covalent fluorescent polymer material: connecting a phenylboronic acid group to lipoic acid or a lipoic acid derivative through an esterification reaction or an amidation reaction of its active ester to obtain benzyl lipoate borate and its derivatives or N-benzylboronic acid lipoamide and its derivatives. After heating and melting the above purified small molecules and removing water, transfer them to a substrate while it is still hot and spread them to obtain a yellow transparent supramolecular polymer. Irradiate it with an ultraviolet-visible light source to obtain the recyclable orthogonal dynamic covalent fluorescent polymer material containing disulfide bonds and borate ester bonds. The dynamic polymer material prepared by the invention is mainly crosslinked and self-assembled by dynamic disulfide bonds, dynamic borate ester bonds, and hydrogen bonds; it has strong fluorescence emission that can vary with temperature under light excitation at a wavelength of 400 nm; it has good biocompatibility, high stability, good homogeneity, and excellent mechanical properties. The preparation method of the invention is simple, and the process is safe and reliable.

The invention discloses a preparation method and application of a fluorescent polymer dot with adjustable chargeability. Using natural polymer sodium alginate SA as the main carbon source and introducing o-phenylenediamine oPDA as an auxiliary agent, carbonized polymer dots SAPD-CPDs are synthesized by a hydrothermal method. SA and oPDA are mixed in water and sonicated until completely dissolved, then the pH value of the solution is adjusted to 4 with hydrochloric acid and sodium hydroxide solutions, sealed in the polytetrafluoroethylene liner of a reaction kettle, and placed in an oven at 160 °C for reaction for 10 h. It is filtered through a 0.22 μm mixed cellulose filter, dialyzed for 24 h with a dialysis bag having a molecular weight cut-off of 500 Da, vacuum concentrated, and then freeze-dried to obtain a solid powder. The carbon dots retain the characteristics of the sodium alginate polymer chain and can form a stable luminescent film with chitosan due to physical adsorption.

The application discloses a one-step preparation method of fluorescent single-chain polymer nanoparticles, and particularly relates to the field of high polymer chemistry. The method comprises the following steps: dissolving polyethylene glycol methyl ether methacrylate, cyanostilbene methacrylate monomer and an initiator in a ninth solvent to obtain a reaction solution; performing a polymerization reaction on the reaction solution under a nitrogen environment to obtain poly((Z)-2-(2-(2-(2-(4-(2-cyano-2-(3,4,5-tri(dodecyloxy)phenyl)vinyl)hydroxyethoxy)ethoxy)ethoxy)ethoxy)methyl acrylate-polyethylene glycol methyl ether methacrylate); dissolving the product in water to obtain a copolymer solution; irradiating the copolymer solution under a UV lamp; and performing freeze-drying separation to obtain fluorescent single-chain polymer nanoparticles. The one-step preparation of the fluorescent polymer single-chain nanoparticles is realized.

The invention belongs to the technical field of anti-counterfeiting films, and particularly discloses a cellulose-based film with temperature and pH stimulation response as well as a preparation method and application of the cellulose-based film with temperature and pH stimulation response. A stimuli-responsive chain segment, an aggregation-induced emission chain segment and a color-controllable fluorescent polymer chain segment are synchronously introduced, so that the cellulose-based membrane with temperature and pH stimuli-responsive can be rapidly prepared in one step, and the cellulose-based membrane can be used for preparing a dynamic anti-counterfeiting membrane; the preparation method adopts biodegradable cellulose as a raw material, and has the advantages of greenness, environmental protection and low carbon.

The invention relates to the field of fluorescent hydrogels, and discloses a polymer hydrogel device for electrothermally regulating fluorescent color change and a preparation method thereof. The preparation method comprises the following steps: applying fluorescent paint on the non-carbon material side of a carbon-based conductive paper, and using the paint as a substrate after drying and curing; attaching a temperature-sensitive fluorescent hydrogel on the surface of the fluorescent paint, and connecting an electrode to one side of the carbon-based conductive paper of the substrate to obtain the polymer hydrogel device. When the hydrogel device is not powered on, the superimposed color of the top layer of the fluorescent polymer hydrogel and the lower layer of the fluorescent paint is displayed under ultraviolet light, and the color of the fluorescent polymer hydrogel is displayed after power is turned on, thereby achieving rich and colorful changes in the color of the device. The device can be applied to the field of intelligent display and used for information encryption and decryption, etc.

The invention discloses a multi-dimensional mud-sand separation swirling flow field particle tracing and capturing test method and a test platform. A mixture of unseparated coarse particles and fine particles is conveyed to the hydrocyclone through the slurry conveying pump, and under the action of centrifugal force of the hydrocyclone, the coarse particles are discharged from the bottom discharge port, and the fine particles are discharged from the upper overflow port. A pulse laser light source and a high-frequency CCD (Charge Coupled Device) camera are used for controlling continuous multi-view multi-time shooting of instantaneous fluorescent polymer microsphere particle images through a high-precision displacement guide rail, and motion tracks of particles with different particle sizes are obtained based on an image tracking algorithm; and accurate measurement of tangential, radial and axial three-dimensional velocity components of the particles is realized through fast Fourier transform cross-correlation analysis. Based on the test method and the test platform, speed distribution information in any tangent plane and multi-dimensional space points in the rotational flow field can be obtained, and non-contact, non-disturbance and high-precision measurement and display of the whole flow field in a complex flow field environment are achieved.

A layer structure having a solid substrate having a surface, the surface carrying a layer including a molecularly imprinted polymer, wherein the molecularly imprinted polymer is adapted to bind a glyphosate analyte, wherein the glyphosate analyte is selected from glyphosate, a glyphosate degradation product, a metabolite of glyphosate or a metabolite of the degradation product of glyphosate, wherein a fluorescence characteristic of the molecularly imprinted polymer changes upon binding of the glyphosate analyte. Further, a method for detecting a glyphosate analyte in a sample includes: providing the layer structure having the molecularly imprinted polymer; providing a fluidic contact of the layer structure with the sample or an organic extract of the sample; measuring a fluorescence property of the layer structure; and estimating a concentration of glyphosate or of the glyphosate related analyte at least semi-quantitatively.

The present invention provides a nano-fluorescent temperature indicator and its preparation method and application, belonging to the technical fields of polymer materials and biomedical engineering. The nano-fluorescent temperature indicator of the present invention is composed of a diblock dual-temperature-responsive fluorescent polymer. The nano-fluorescent temperature indicator includes a temperature-responsive fluorescent polymer A with a polar-responsive fluorescent molecule modified at the end and a lower critical solution temperature of 40 °C, and a temperature-responsive fluorescent polymer B with a non-polar-responsive fluorescent molecule that can be excited by the temperature-responsive fluorescent polymer A modified at the end and a lower critical solution temperature of 46 °C. The nano-fluorescent temperature indicator has no fluorescence when the ambient temperature is lower than 40 °C, shows green fluorescence when the temperature rises to 40 °C - 46 °C, and shows red fluorescence when the temperature is higher than 46 °C. The nano-fluorescent temperature indicator has good applications in temperature detection of cells or sub-cells and real-time temperature measurement and temperature control of local hyperthermia.

The application belongs to the technical field of anti-counterfeiting films, and specifically discloses a cellulose-based film with temperature and pH stimulus response, a preparation method thereof and application, wherein a cellulose-based macromolecular RAFT reagent is prepared, in-situ surface-initiated RAFT polymerization is performed, and a chain segment with stimulus response, an aggregation-induced emission light chain segment and a fluorescent polymer chain segment with controllable color change are synchronously introduced, so that the cellulose-based film with temperature and pH stimulus response is prepared in one step and quickly, and the film can be used to prepare a dynamic anti-counterfeiting film; the preparation method adopts biodegradable cellulose as raw material, and has the advantages of being green, environmentally-friendly and low-carbon.

Polymer dots comprising a functionalized fluorescent polymer and an amphiphilic molecule are provided.

The invention discloses a cyclic non-traditional fluorescent polymer and a method for regulating and controlling the light emitting color of the cyclic non-traditional fluorescent polymer. The fluorescent polymer is a polymer with a molecular main chain containing a ring, vinyl amine and vinyl ether group, or a ring and vinyl amine structure. The non-traditional fluorescent polymer provided by the invention can realize the change of the fluorescence color from a blue light area to a red light area and even a near-infrared area through the size of a cyclic secondary amine alcohol carbon ring (namely the number of ring carbon atoms) and the relative position of a cyclic monomer reaction functional group, and has the characteristic of adjustable and controllable light emitting color; the method has the advantages of mild polymerization reaction conditions, simple and efficient system, environmental friendliness and the like, and can be applied to the fields of coating anti-counterfeiting, information encryption, colorful blended spinning and the like.

The present application belongs to the technical field of environmental detection, and particularly relates to a Turn-On type fluorescent polymer, a synthesis method thereof and application of the fluorescent polymer in detecting uranyl ions. The present application ingeniously uses the structural characteristics of tetraphenyl ethylene tetracarboxaldehyde to synthesize a fluorescent polymer TPE-COPs having a fluorescence enhancement response to uranyl ions at normal temperature. The fluorescent polymer is a "Turn-On" type fluorescent polymer, has advantages of high sensitivity, high selectivity and rapid response in detecting uranyl ions, can simultaneously improve the sensitivity and anti-interference ability, realizes all-round consideration of the detection limit, the detection range and the selectivity, and shows great potential and value in biomedical research and application. Meanwhile, the fluorescent polymer TPE-COPs of the present application can be completed at room temperature, has a simple process, does not need harsh environments such as high temperature, high pressure and oxygen-free, and is more suitable for industrial scale production application.

The application provides a single-chain super-small fluorescent polymer nanodot modified Bacillus subtilis derived nanometer calcium carbonate composite material (SC-PNPs@CaCO3) as a high-sensitivity fluorescent sensing platform for choline acetyltransferase (ChAT) activity detection. The composite material is synthesized through biological mineralization of Bacillus subtilis, the free radical polymerization method is used to prepare the SC-PNPs with positive charges on the surface, and a stable fluorescent sensing system is constructed through self-assembly. Coenzyme A (CoA) is generated in the ChAT catalytic reaction, which can significantly quench the fluorescent signal of the material, realize high-sensitivity detection of the ChAT activity change, and the detection limit reaches 0.00074 mU / mL. The fluorescent sensing platform can realize real-time monitoring of the ChAT activity change, and reveal the regulation effect of the cholinergic signal pathway in the repair process in a skin repair model. The application provides an innovative technical means for choline acetyltransferase activity analysis, and provides a new research direction for exploring the function of the cholinergic system in skin repair and other physiological and pathological processes.

The invention discloses a multi-resonance thermal activation delayed fluorescence high-molecular compound based on a polynorbornene main chain and a space heavy atom effect, a preparation method and an organic electroluminescent device, and belongs to the field of organic luminescent materials. The high-molecular compound comprises a heavy atom-containing structural unit, a multiple resonance thermal activation delayed fluorescence unit and a non-conjugated norbornene side chain, so that the anti-intersystem crossing process of an MR-TADF unit can be improved, the spectrum width and peak position of a luminescent spectrum are not influenced, and a new support is provided for developing a high-performance MR-TADF organic light-emitting device.

The application discloses a preparation and application of a chiral selective optical filter. The chiral selective optical filter is a chiral film obtained by spin coating of chiral silver clusters; the chiral silver clusters are obtained by coordination reaction of chiral molecules containing mercapto and silver ions; the chiral molecules containing mercapto can be obtained by breaking disulfide bonds of L / D-cystine derivatives. The optical filter has important applications in biological medicine, optical information storage and encryption, optical devices and CP-LED. The corresponding circularly polarized signals can be obtained by using the optical filter, i.e. exciting a light emitting unit and then obtaining the circularly polarized signals through the chiral selective optical filter. The light emitting unit is a non-chiral organic dye molecule, inorganic phosphor material or fluorescent polymer microsphere. The optical filter is located at the rear side of the light emitting unit. The application can obtain the corresponding better circularly polarized signals by using the non-chiral light emitting unit through the chiral selective optical filter, and the preparation method is simple and has strong operability.

The invention relates to the technical field of fluorescent sensors, in particular to a method for regulating and controlling sequential red shift of emission wavelengths of fatty amine type non-traditional fluorescent polymers. At present, a method for regulating and controlling the sequential change of the fluorescence color of the aliphatic amine type non-conjugated fluorescent polymer from blue light to red light is lacked. In order to solve the technical problem, the invention provides the method for regulating and controlling the sequential red shift of the emission wavelength of the fatty amine type non-traditional fluorescent polymer. By sequentially changing the length of a straight-chain secondary amine alcohol carbon chain, the variety of substituent groups on an amino group and the relative position of the amino group on a carbocyclic ring and an alkyl alcohol hydroxyl group in reaction raw materials, the aliphatic amine type non-traditional fluorescent polymer is subjected to sequential red shift according to an adjustment sequence, and the method is simple, controllable, environment-friendly and high in yield. Good application prospects are realized in the fields of fluorescence sensors, biomedical imaging, photodynamic therapy and the like.

A multi-functional near-infrared fluorescent polymer dot (Pdot)-siRNA nanoplatform is disclosed herein. The disclosed technology addresses challenges in siRNA delivery, including poor stability, degradation, and immune recognition, by utilizing positively charged Pdots synthesized from polymers, and electrostatic binding with negatively charged siRNA. The Pdots exhibit dual fluorescence emission at 588 nm and 775 nm, enabling real-time visualization of cellular uptake and siRNA delivery. The nanoplatform demonstrates efficient inhibition of target gene expression, and protein levels in cells. The Pdots provide minimal toxicity and persist in cells for extended periods, offering a robust tool for therapeutic applications, bioimaging, and molecular labeling. This approach combines siRNA delivery with simultaneous imaging, presenting a versatile method for targeted gene regulation and research applications.

This invention relates to the field of fluorescent polymer technology, specifically to a linear fluorescent polymer and its preparation method. The solid-state fluorescence quantum yield of linear fluorescent polymers obtained by reacting tertiary amines with activated alkyne monomers is difficult to reach 10%. Based on the above problem, this invention provides a linear fluorescent polymer obtained by triggering click reactions between a monohydric secondary amino alcohol and an activated alkyne monomer. In this invention, during the click reaction between the monohydric secondary amino alcohol and the activated alkyne monomer, the amino group first reacts with the alkyne group, followed by the hydroxyl group. This results in a higher quantum yield in the obtained fluorescent polymer, exhibiting a high solid-state fluorescence quantum yield, easily reaching over 10%, and even exceeding 20%, achieving better technical results.

The fluorescent spot imaging quantity calibrator for the fluorescent spot enzyme-linked immunosorbent assay analyzer comprises an elisa plate and a calibration assembly, the calibration assembly comprises a sieve plate with micropores, a fluorescent polymer film, a reflective film and a sealing film, when the calibration assembly is used for top detection, the lower end of the sieve plate with the micropores is covered and bonded with the fluorescent polymer film, and the lower end of the sieve plate with the micropores is bonded with the reflective film. The lower end of the fluorescent polymer film is covered and bonded with a reflecting film, the upper end of the sieve plate with the micropores is covered and bonded with a sealing film, the diameter of the calibration components is smaller than that of plate holes of the elisa plate, and the calibration components are respectively placed in 4-6 plate holes near the center of the elisa plate in parallel according to the bonding positions. The sieve plates with the micropores are arranged in the plate holes and are respectively fixed in the plate holes through a binder, the number of the micropores in the sieve plates with the micropores is known, the elisa plate is black, the bottom of the elisa plate is a transparent or non-transparent elisa plate for visible light, and the sealing film is a transparent sealing film in a visible light area.

Polymer dots comprising a functionalized fluorescent polymer and an amphiphilic molecule are provided.

SOLVENT-FREE ELECTRODE PREPARATION METHOD AND ELECTRODE FORMULATIONS CANNOT BE OBTAINED BY SAID METHOD. This application relates to solvent-free electrode formulations based on fluoropolymer, obtained by extrusion and / or comprising one or more co-binders including TPU, the electrodes containing them, and the corresponding electrochemical elements and accumulators. Figure for abstract: None

The invention discloses a triphenylmethyl free radical polymer with light-sensitive and heat-sensitive characteristics. The triphenylmethyl free radical polymer shows the characteristic that fluorescence can be regulated and controlled. The polymer is dissolved in a solvent, after 365 nm ultraviolet irradiation, free radical signals are weakened, fluorescence is subjected to blue shift, and the maximum emission wavelength is shifted to 470 nm, so that the cyan-blue fluorescent polymer is obtained. After the blue fluorescent solid is heated at 120 DEG C for 2 hours, the free radical signal is enhanced, and the fluorescence reversibly shifts back to the initial red (682 nm). The illumination and heating regulation process can be circulated for multiple times, which shows that the fluorescence of the triphenylmethyl free radical polymer has reversible regulation. The triphenylmethyl free radical polymer disclosed by the invention has the advantages of simple process and convenience in operation due to the fluorescence regulation characteristic, and the obtained fluorescent polymer has application potential in the field of luminescent materials.

A dual-layer optical encryption fluorescent polymer waveguide chip based on optical pulse code modulation technology belongs to the field of functional photonic chip technology. It consists of a substrate layer, a buffer layer, a cladding layer, a bottom waveguide layer, and a top waveguide layer. The cladding layer is divided into three parts: a lower cladding layer, a middle cladding layer, and an upper cladding layer. The bottom waveguide is located within the middle cladding layer, and the top waveguide is located within the upper cladding layer. The bottom and top waveguides do not overlap in the chip's top-view plane. The waveguide layer material is obtained by doping fluorescent small-molecule oligomer chromophores into a polymer material. This invention achieves signal optical pulse coding by modulating the pump light power intensity. By detecting changes in optical transmission loss in the fiber optic system, it determines whether eavesdropping has occurred. Eavesdropping is indicated by optical transmission loss exceeding a threshold. False information is displayed in the bottom waveguide for disguise, while the modulated information is transmitted encrypted through the top waveguide, thus solving the problems of limited controllability and insufficient security in traditional encryption technologies.

The present invention relates to an optoelectronic device, in particular an optical wavelength converter or an infrared (IR) emitting or IR photodiode device, comprising an organic matrix, wherein the organic matrix is ​​coated with at least one layer comprising an amorphous fluoropolymer. The invention also relates to a method for manufacturing such devices.

The invention relates to a high-tensile-strength fluorescent self-repairing polyolefin material as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials. In order to solve the problems of poor mechanical properties and lack of self-repairing function of the existing fluorescent polymer, the invention adopts a phosphine-palladium sulfonate catalyst to efficiently catalyze binary or ternary polymerization of ethylene, a coumarin / anthracene / carbazole / triphenylamine / tetraphenylethylene / pyrene-containing polar fluorescent monomer and dicyclopentadiene (DCPD) to obtain the self-repairing polymer. The functional unit is successfully embedded into a polyolefin main chain through a covalent bond. The material shows excellent comprehensive performance: the tensile strength of the material reaches up to 46.79 MPa, and the elongation at break can reach 732%, which are far better than those of similar materials; under the ultraviolet light of 365 nm, the coating has the strong fluorescence characteristic and the efficient self-repairing capacity, and scratches can be completely healed within 30 minutes; in addition, high-resolution patterning can be realized by utilizing the photoinduced fluorescence quenching effect. The invention provides a brand new strategy for preparing an intelligent polyolefin material with excellent mechanical property, damage visualization and self-repairing capability, and has important application value in the frontier fields of information encryption, intelligent sensing, flexible electronics and the like.