124 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.

There is provided a method for producing a fluoropolymer, the method including polymerizing a fluoromonomer in an aqueous medium to obtain a polymerization dispersion containing the fluoropolymer, and bringing the fluoropolymer in the polymerization dispersion into contact with an alcohol having 3 to 5 carbon atoms to coagulate the fluoropolymer to thereby obtain the fluoropolymer.

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.

The invention discloses a synthetic method of a degradable polystyrene material with multicolor fluorescence. According to the method, a multi-color fluorescent polymer material with conventional luminescence property and aggregation-induced emission (AIE) property is obtained through cationic polymerization and Friedel-Crafts reaction, polymer materials with different fluorescence colors can be obtained by adjusting the reaction ratio of an active monomer to a catalyst and the reaction temperature, adjustable emission wavelength can be achieved, and the method is suitable for large-scale industrial production. And recycling can be realized through degradation. The synthesis method of the multi-color fluorescent degradable polystyrene material has the characteristics of simple operation, low synthesis cost, excellent material photophysical properties and the like, the obtained multi-color fluorescent polymer has conventional luminescence properties and AIE properties, the aggregation state fluorescence is enhanced, and the fluorescence intensity is enhanced. Good application prospects are realized in the fields of optical anti-counterfeiting, imaging marks, photoelectric elements and the like.

A liquid-containing container is the liquid-containing container containing a liquid and includes a container body with an opening portion and a stopper that closes the opening portion and has oxygen permeability. The stopper includes a stopper body portion and a barrier layer provided on at least part of a surface of the stopper body portion. The barrier layer constitutes at least a surface of a portion of the stopper to be inserted into the container body and a surface of the stopper defining a storage space for the liquid and includes at least one selected from the group consisting of a p-xylylene layer, a diamond-like carbon layer, and a fluoropolymer layer.

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.

A composition comprising a first perfluoro polymer having a glass transition temperature of 10°C or less, and a second fluoro polymer that is different from the first perfluoro polymer and contains tetrafluoroethylene and a structural unit based on a compound represented by formula (1), wherein the content of a structural unit based on perfluoro (alkyl vinyl ether) with respect to the total content of all structural units of the first perfluoro polymer and the second fluoro polymer is 0.05-5.0 mol%. Formula (1): CF2=CF-CF2-O-Rf. In formula (1), Rf is a C1-10 perfluoroalkyl group and may have an etheric oxygen atom between carbon atoms in the perfluoroalkyl group.

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 relates to a method for preparing a fluorescent polymer, a fluorescent polymer product obtained by the method and application of the fluorescent polymer product. A full-donor type fluorescent polymer and a donor-receptor type fluorescent polymer are prepared by reacting an aryl Grignard reagent with aryl halide. The preparation method comprises the following steps: firstly, preparing a corresponding donor type aryl double Grignard reagent; and carrying out a coupling reaction on the prepared donor-type aryl bis-Grignard reagent and a tetrahydrofuran mixed solution of donor-type or receptor-type aryl halide at 20-60 DEG C for 6-24 h, and purifying to obtain the fluorescent polymer. According to the present invention, the reactant selectivity is high, the side reaction is effectively reduced, the fluorescence color of the prepared fluorescent polymer can be regulated and controlled through the donor-type or receptor-type reaction monomer, and the advantages of high regularity, strong luminescence, high quantum yield, strong heat resistance, simple process, low cost and the like are provided.

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.

A heating device including: a rotating member for heating, an opposing member, which is arranged so as to be opposed to the rotating member, and forms a nip portion together with the rotating member, and a biasing member, which is arranged inside the rotating member, has an opposing surface with respect to an inner peripheral surface of the rotating member, and biases the rotating member to the opposing member. The inner peripheral surface and the opposing surface are brought into contact with each other via a grease composition to form a sliding portion. The grease composition contains a base oil. The base oil contains a fluoropolymer having a specific structure and a perfluoropolyether having a specific kinematic viscosity and a specific evaporation loss and having a specific structure.

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 provides a semiconductor polymer dot, a preparation method thereof and a fluorescent probe. The semiconductor polymer point comprises a fluorescent polymer and an amphiphilic organic polymer, the surface of the fluorescent polymer is coated with the amphiphilic organic polymer, and the average particle size of the semiconductor polymer point is 1-10.5 nm; the fluorescent polymer comprises a semiconductor polymer with a trans-olefin structure and poly [(BODIPY)-co-(9, 9-dioctyl fluorenyl-2, 7-diyl)] or the semiconductor polymer with the trans-olefin structure. The semiconductor polymer point comprises a fluorescent polymer and an amphiphilic organic polymer coating the fluorescent polymer, and by limiting the selection of the fluorescent polymer, the semiconductor polymer point with a specific average particle size has a good scintillation characteristic, and can realize high-order SOFI imaging of a single particle and a cellular level.

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 present disclosure relates to a thermally-conductive, electrically-insulating polymer composite material. The material includes a continuous polymeric phase including a fluorinated polymer phase having a total fluoropolymer content of at least 50 wt%, the fluorinated polymer phase including a functional polymer, the functional polymer comprising reactive functional groups; and optionally, a thermoplastic fluoropolymer, the thermoplastic fluoropolymer being miscible with the functional polymer; and phase-separated from the fluorinated polymer phase, an elastomeric polymer; and dispersed within the continuous polymeric phase, a thermally-conductive, electrically-insulating filler. The materials of the disclosure can be formed into tubes, and used, for example, in thermal management systems and methods, especially for magnetic resonance instruments.

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.

This invention describes the preparation and characterization of cross-linkable fluoropolymers, These cross-linkable fluoropolymers contain keto functional monomer. The keto functional monomer is incorporated on fluoropolymer while crosslinking agent was post-added after polymerization. The cross-linking reaction occurs after water / solvent evaporation or during melt processing.

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.

There is provided a method for producing a fluoropolymer, the method including polymerizing a fluoromonomer in an aqueous medium to obtain a polymerization dispersion containing the fluoropolymer, and bringing the fluoropolymer in the polymerization dispersion into contact with an alcohol having 3 to 5 carbon atoms to coagulate the fluoropolymer to thereby obtain the fluoropolymer.

The invention discloses a method for preparing a multicolor fluorescent polymer based on Friedel-Crafts polymerization reaction and chemiluminescence application of the multicolor fluorescent polymer. According to the method, through a Friedel-Crafts polymerization reaction, different phenyl compounds are introduced, so that the regulation and control on the fluorescence color are realized. According to the method, a multicolor fluorescent polymer material with conventional fluorescent property and fluorescence red shift aggregation-induced emission (AIE) property can be obtained. As the molecules aggregate, the fluorescence emission wavelength shifts towards a longer wavelength. The synthesis method of the multicolor fluorescent polymer can be carried out under normal temperature and air conditions, and has the advantages of simplicity, high efficiency, suitability for large-scale production and the like. The obtained polymer shows excellent performance in chemiluminescence application, including high luminescence efficiency, adjustable luminescence color and good environmental stability. Due to the characteristics, the method has a relatively wide application prospect in biosensors, chemical analysis instruments and safety detection equipment.