15 results about "Luminescent polymers" patented technology

The invention discloses a long-afterglow material based on waste PET and a preparation method and application thereof.Organic luminescent substance crown alkene serves as luminescent molecules and is fused and doped into recycled waste PET, the waste PET is upgraded and reconstructed into a persistent luminescent polymer element, PET macromolecular chains are folded front and back to form regular lamellas, and the lamellas are uniformly distributed on the surface of the waste PET, so that the long-afterglow material based on the waste PET is obtained. Excitons are stabilized, and oxygen in the atmosphere is prevented from being quenched. Due to the planar and rigid structure of the polycyclic aromatic hydrocarbon, intramolecular movement can be inhibited, so that non-radiative decay channels are reduced, and the ultra-long afterglow effect is realized. According to the long-afterglow material, pollution of waste materials is reduced, upgrading and recycling of resources are achieved, upgrading and recycling steps are simple and convenient, cost is low, the preparation process is easy to scale, economical and efficient, and the long-afterglow material has good industrial popularization prospects and has important application value in the technical field of plastic upgrading and recycling.

The invention relates to the technical field of circular polarization luminescent materials, and discloses a luminescent object charge regulated chiral liquid crystal superstructure and a preparation method and application thereof. The chiral liquid crystal superstructure for charge regulation and control of the light-emitting object comprises a cellulose nanocrystalline liquid crystal film and an achiral light-emitting object embedded in the cellulose nanocrystalline liquid crystal film, the achiral light-emitting object comprises any one of carbon dots, organic light-emitting small molecules, light-emitting polymers or quantum dots; the surface of the achiral luminous object is positively charged or negatively charged. According to the chiral liquid crystal superstructure with the positively charged light-emitting object, the fusion of CNCs crystal aggregates is inhibited by utilizing the electrostatic crosslinking effect of positive charges, and a metamaterial with a Janus structure is constructed; the lower layer is a uniform cholesteric light-emitting layer composed of a light-emitting object / CNC liquid crystal, and the upper layer is a light-emitting object / CNC disordered light-emitting layer; the method breaks through the limitation of a traditional single rotation direction, and a left-rotation CPL and a right-rotation CPL are generated on the front face and the back face of the same superstructure respectively.

This invention relates to a method for synthesizing multicolored luminescent polymer films using a microwave approach. The method first involves dissolving acrylamide, ammonium persulfate, and α-thiophenecarboxylic acid trifluoroacetone in a solvent, then refluxing the mixture under microwave power. After cooling to room temperature, polymer A is precipitated with methanol. Polymer A is then dissolved in deionized water, europium nitrate solution is added, the pH is adjusted to neutral, the mixture is shaken, and after standing, polymer B is precipitated with methanol. Finally, polymer B is dissolved in deionized water to obtain a colloidal solution. The colloidal solution is dropped into a silicone mold and dried to obtain the multicolored luminescent polymer film. This invention provides a simple, convenient, and rapid preparation method that does not require inert gas protection and can complete polymerization within minutes, showing broad application prospects.

The invention discloses a cellulose-based light-emitting polymer and a preparation method and application thereof, the cellulose-based light-emitting polymer has a structure as shown in a formula (I), and the cellulose-based light-emitting polymer is prepared by carrying out click polymerization reaction on an organic light-emitting group with AIE characteristics and ethyl cellulose in an organic solvent under the catalysis of an organic base. The obtained polymer has both high transparency and high ultraviolet impedance effect, also has fluorescence characteristic, and realizes ultraviolet shielding and indication functions for ultraviolet sensitive materials. Along with the increase of the grafting rate, the fluorescence color can be regulated from blue-green to orange red, the grafting-rate-dependent multi-color luminescence characteristic is presented, and the method can be applied to the field of multi-color fluorescence two-dimensional codes. The acid-responsive polymer is developed through secondary grafting, can realize fluorescence discoloration under acidic stimulation, and can be used for constructing a dynamic multicolor encoding device with high data storage density and enhanced encryption capability. The invention provides an innovative method for developing reversible and multifunctional fluorescent cellulose materials.

The invention discloses an ultraviolet absorption enhanced aggregation-induced emission (AIE) polymer and an application thereof in sunlight catalysis. The ultraviolet absorption enhanced aggregation-induced emission (AIE) polymer shows an acid-base response property and a prospect in the aspect of sunlight catalysis application. The ultraviolet absorbent with an ultraviolet absorption enhancing function is connected to the molecular chain end of the polymer, so that the absorption capacity of the material in an ultraviolet region is remarkably enhanced, and the AIE effect of visible light emission of the material is further coordinated, so that the photocatalytic hydrogen production efficiency is improved under full-spectrum sunlight irradiation. The polymer provided by the invention has the advantages of simple synthesis process and mild conditions. The obtained modified polymer is high in photocatalytic activity and good in stability, a new solution is provided for developing efficient photocatalytic hydrogen production materials, and the modified polymer has wide application prospects.

The application discloses a copper ion removing and detecting reagent based on cluster luminescent polymer microspheres, a preparation method and application thereof, and the reagent is obtained by sulfonating monodisperse porous cross-linked polystyrene microspheres, and the reagent is used for removing and specifically detecting copper ions. The one-step sulfonating monodisperse porous cross-linked polystyrene microsphere method is used to prepare the copper ion removing and detecting reagent based on cluster luminescent polymer microspheres. The polymer fluorescent microspheres based on cluster luminescence have excellent detection capacity for copper ions. Meanwhile, the sulfonic acid groups after the sulfonation treatment make the polymer microspheres have excellent copper ion removing capacity. The application provides a new method for copper ion detection and removal, and the new method has the advantages of simple operation, economy and good stability.

The application discloses a fiber light-emitting knitted fabric and a preparation process thereof, and belongs to the technical field of fabric preparation. The light-emitting knitted fabric comprises an upper light-emitting fabric layer, a middle isolation layer and a lower light-emitting fabric layer, and the two layers are formed by interweaving organic-solvent-treated side light-emitting polymer optical fibers and polyester yarns. The light path is isolated through the middle isolation layer, and the pattern switching display is realized in cooperation with an independent light source system. Through fabric organization design, the following effects are realized. Brightness gradient grating stripes are formed through gradient stripe organizations; a pupil focusing pattern is formed through nine-square organizations; a target heart pattern is formed through concentric ring organizations by utilizing thickness difference to strengthen brightness contrast; and moire interference dynamic effects are generated through chessboard nested organizations by alternately arranging light and dark squares and interlacing light band directions, and double-layer misplacement superposition. The application is suitable for the fields of stage costumes, indoor decoration, safety warning, intelligent wearing and flexible display, and three light-emitting states can be switched through switches.

The invention discloses a mechanical response luminescent polymer based on an AIE polycaprolactone molecular ring and a preparation method thereof, and belongs to the field of mechanical response intelligent materials. The technical problems that an existing AIE-based mechanical response material is poor in mechanical property, low in response sensitivity and poor in cyclic reversibility are solved. The preparation method comprises the following steps: synthesizing linear polycaprolactone with an AIE group by taking dihydric alcohol containing an aggregation-induced emission group as an initiator; then preparing a linear precursor with polymerizable double bonds in a molecular chain segment and alkynyl and azido at the tail ends through multi-step end group functionalization reaction; the preparation method comprises the following steps: cyclizing a linear precursor to obtain an AIE polycaprolactone molecular ring containing double bonds; and finally, initiating double bonds on the ring through an initiator for polymerization to form a polymer network. The obtained material has very high elongation at break, high-sensitivity force-induced fluorescence enhanced response and excellent cycling stability, and can be widely applied to the fields of stress sensing, damage diagnosis, soft robots and the like.

The invention discloses a preparation method of an aircraft anti-icing fluid containing a gram-level water-soluble aggregation-induced emission polymer. Comprising the following steps: 1) adding bisacrylamide and bifunctional water-soluble basic amino acid into a mixed solution of ethanol and water according to a molar ratio of 1.3: 1, carrying out vortex mixing to form a homogeneous reaction solution, carrying out bubbling and deoxygenization for 15-30 minutes by using nitrogen or argon, and then adding triethylamine; (2) carrying out Michael addition reaction in a Schlenk polymerization tube, a reaction bottle or a reaction kettle at the reaction temperature of 50-90 DEG C for 2-24 hours; 3) after the reaction is finished, primarily concentrating the reaction liquid by using a rotary evaporator, and precipitating in a large amount of ethanol to obtain a light yellow or orange red precipitate; and 4) collecting and drying to obtain the polymer material with the property of gathering, inducing and emitting white fluorescence. The inspection of secondary icing on the key surface of an airplane under the low-temperature climate condition can be quickly, accurately and efficiently realized only by visual inspection assisted by a UV light source, and the compatibility of the anti-icing performance and visual detection is realized.

The invention provides polymer dispersed liquid crystal ink as well as a preparation method and application thereof. According to the polymer dispersed liquid crystal ink, a high-molecular polymer is used for wrapping a mixed cholesteric liquid crystal material, and the polymer dispersed liquid crystal ink which takes the high-molecular polymer as a matrix and takes mixed cholesteric liquid crystal microdroplets as an embedding body is formed by utilizing a polymerization induced phase separation preparation method; the material can be placed in a liquid crystal box or printed on a substrate through ink-jet printing, dispensing printing and blade coating methods, phase separation can be completed through ultraviolet radiation, and the circularly polarized luminescence property is reserved. The circularly polarized light-emitting polymer dispersed liquid crystal ink provided by the invention has the characteristics of high light-emitting asymmetric factor, printability, simple preparation method and firm adhesion, and meets the requirements of low-cost and high-yield commercial scale production.

The application belongs to the field of mechanical color-changing materials, and relates to a tetraphenyl ethylene-containing cycloalkane and a preparation method thereof, and a mechanical response luminescent polymer based on AIE supramolecular cycloalkane and application. The structure of the tetraphenyl ethylene-containing cycloalkane is shown in formula I: in formula I, A is a tetraphenyl ethylene structural unit, m is an integer of 2-20, and n is an integer of 2-20. In the application, AIEgens is designed as a cycloalkane, and the mechanical force only changes the conformation of the ring, that is, only the intramolecular interaction is changed so as to change the luminescent intensity of the molecule. The luminescent characteristics are independent of the AIEgens concentration and the morphology of the material. The mechanical response luminescent polymer based on AIE supramolecular cycloalkane has stronger applicability.

The application discloses a method for constructing atypical near-infrared light-emitting polymers based on itaconic anhydride and application thereof, and belongs to the technical field of organic light-emitting materials. The method comprises the following steps: first, preparing a thiol-containing intermediate by reacting N-methyldiethanolamine derivatives with double / multi-thiol compounds; and then, performing nucleophilic ring-opening polymerization on the thiol-containing intermediate and itaconic anhydride to obtain a target polymer. The polymer is completely composed of non-conjugated structural units and does not contain a pi-conjugated aromatic ring, and the light emission is derived from cluster-induced light emission promoted by strong ion interaction formed in the polymerization process. By selecting different thiol compounds and regulating the topological structure (linear or hyperbranched) of the polymer, a polymer with an emission wavelength in the 600-800 nm near-infrared region can be prepared. The polymer has the advantages of simple synthesis, good water solubility, high biocompatibility, aggregation-induced light emission, pH / ion response and the like, and has important application value in the fields of near-infrared fluorescence imaging and biosensing.

The invention discloses an aggregation-induced emission (AIE) polymer probe with lysosome targeting viscosity response as well as a preparation method and application of the AIE polymer probe. According to the probe, tetraphenyl ethylene (TPE) is used as an AIE luminous skeleton, and two hydrophilic flexible side chains are introduced by utilizing the excellent structural modifiability of the tetraphenyl ethylene (TPE). The tail end of each side chain is modified with pyridine positive ions, and the pyridine positive ions can specifically target a lysosome membrane through electrostatic interaction; the three ether groups embedded in the side chain effectively enhance the water solubility of the molecule. According to the invention, TPE and an amphiphilic flexible side chain are used to construct an AIE polymer, a TPE-derived AIE polymer probe (PTPEB-Py) is designed, and a drug action time-lysosome viscosity-fluorescence lifetime (t-eta-tau) three-dimensional linear relationship is constructed through intracellular and extracellular fluorescence lifetime signals so as to visualize a lysosome viscosity change value. Therefore, quantitative detection and visualization of lysosome viscosity change in the mitochondrial autophagy process in cancer cells are realized.

The application belongs to the technical field of light-emitting polymers, and particularly relates to a long-afterglow polymer material and a preparation method and application thereof. The long-afterglow polymer material is successfully prepared by taking tri(4-boronic acid phenol ester phenyl) amine as a light-emitting center and an electron donor and an aromatic polyester with strong electron-accepting ability as a polymer matrix. The interaction between the electron-rich tri(4-boronic acid phenol ester phenyl) amine and the strong electron-withdrawing aromatic polyester effectively slows down the non-radiative transition process of excitons, and thus realizes a long-afterglow effect with a maximum of 12 hours. In particular, when the long-afterglow polymer material is excited by sunlight, the afterglow intensity is significantly improved, and the green afterglow can be maintained for up to 6 hours. In addition, the material also exhibits excellent flexibility and transparency. Moreover, the preparation process of the material is simple, and is expected to be applied in the fields of flexible display, anti-counterfeiting, information storage and wearable smart devices.

The invention belongs to the technical field of functional polymer materials, and relates to a chemiluminescent polymer film prepared by mechanical force-initiated gated degradation and a preparation method thereof, and the preparation method comprises the following steps: adding an acrylate monomer, a photoinitiator and a force-sensitive group cross-linking agent into a glass bottle; the complete dissolution of the force-sensitive group crosslinking agent compound and the photoinitiator in the acrylate monomer is realized; injecting the mixed solution into a silica gel mold with glass sheets clamped on two sides, initiating polymerization by illumination of a white light source, placing a polymer film in a tetrahydrofuran solution after reaction, fully swelling to remove residual monomers, and airing to obtain the mechanical force response polymer film with the chemiluminescence characteristic. According to the change of the chemical structure of the cross-linking agent, a gate controlled switch can be triggered by mechanical force so as to trigger the chemiluminescence polymer film to realize chemiluminescence before and after being stimulated by the mechanical force, meanwhile, the main chain of the polymer is kept complete, and the visual spectrum detection range of the mechanical force response type high polymer material is expanded.