191results about How to "Fluorescent" patented technology

The invention discloses a protein-coated fluorescent gold nanocluster as well as a preparation method and application thereof. The fluorescent gold nanocluster is an aprotinin-coated gold nanocluster,which is composed of aprotinin molecular and Au22 or Au21 or Au16. Compared with the prior art, the fluorescent gold nanocluster has fluorescence, the activity of the aprotinin is not influenced, sothat the fluorescent gold nanocluster can be applied to fields of metal ion detection, biological imaging and protease detection.

The invention discloses amino porphyrin-poly (N-isopropylacrylamide) europium coordination compound and a preparation method of the amino porphyrin-poly (N-isopropylacrylamide) europium coordination compound. The preparation method of the amino porphyrin- poly (N-isopropylacrylamide) europium coordination compound is characterized in that (NH2)n-TPP is prepared into an ATRP initiator which is NH2-TPP-X, wherein the X is halogen. The NH2-TPP-X is adopted to initiate NIPAM to be polymerized to obtain polymer which is (NH2)n-TPP-PNIPAM. The europium with tervalence is coordinated with the polymer (NH2)n-TPP-PNIPAM to obtain coordination compound which is (NH2)n-TPP-PNIPAM-Eu(III)-TTA through the TTA, wherein the n meets an equation that is n=1,2,3. The amino porphyrin- poly (N-isopropylacrylamide) europium coordination compound is characterized in that a short form of the amino porphyrin- poly (N-isopropylacrylamide) europium coordination compound is (NH2)n-TPP-PNIPAM-Eu(III)-TTA, wherein the TPP is tetraphenylporphyrin, wherein the shortened form of the tetraphenylporphyrin is porphyrin, the PNIPAM is the poly (N-isopropylacrylamide), the Eu(III) is the europium with the tervalence, and the TTA is alpha- thenoyltrifluoroacetone.

The invention discloses an infrared nonlinear optical crystal and a preparation method and application thereof. The infrared nonlinear optical crystal has a molecular formula shown as A18X21Y6M48, wherein A is Ba, Sr or Pb; X is Zn, Cd or Mn; Y is Ga, In or Al; and M is S, Se or Te. The crystal belongs to a trigonal crystal system, and the space group is R3. Crystal Ba18Zn21Ga6S48 is a type-I phase matching nonlinear optical material, the particle size is in a range of 150-210 mu m, the frequency multiplication intensity and the laser-induced damage threshold of the powder are respectively 0.5 time and 28 times of that of commercial material AgGaS2, others crystals have a same or similar crystal structure and optical and other properties, have important military and civil application prospects, and can be used for optoelectrionic countermeasures, resource probing, space anti missile, communication and the like.

The present invention proposes a method of and system for analyzing samples (particularly, bio-samples), wherein the continuous spectrum white light pulse generated from an ultra-short optical pulse is used in a simple manner. By a system according to the invention, continuous spectrum white light pulses generated by converging ultra-short optical pulses on a point in a transparent substance 23 are dispersed into a spectrum of light by a dispersing element 25, and a plurality of objective wavelength components are separately selected by small reflection mirrors, masked mirrors or the like. The selected objective wavelength components are combined by the dispersing element 25 into a composite optical pulse containing the objective wavelength components. The composite optical pulse is irradiated onto the bio-sample 28 or other samples, whereby only the desired fluorescent substances are excited by the objective wavelength components corresponding to them. The selected objective wavelength components may preferably have different light path lengths. By this construction, the component optical pulses corresponding to the objective wavelengths in the composite optical pulse are separated from each other, so that the noise due to the interference of different wavelength components is prevented.

The invention discloses a fluorescent and flame retarded functionalization hydrotalcite and a preparation method thereof. Ionic liquid is mixed with impurities and adsorbed in the layer gaps and surfaces of the hydrotalcite by virtue of the high specific surface area and the stratified structure property of the hydrotalcite, so that the functionalization hydrotalcite which has both fluorescence and flame retardancy is prepared. The functionalization hydrotalcite combines the performances of fluorescence and flame retardancy of the hydrotalcite and the ionic liquid, a blue light area of 400-500nm has strong emission peak and also has good flame retardancy. The functionalization hydrotalcite prepared by the method is simple in manufacturing and is easy to operate, the product is environment friendly, the grain size is controllable, and the hydrotalcite has good compatibility with high polymer material.

A metal complex liquid crystal polymer and preparation method thereof, belongs to the technical field of polymer chemistry. The structure general formula of the metal complex liquid crystal polymer is (1), wherein R1 is cholesteric liquid crystal monomer; R2 and R3 respectively are -H and -OCnH2n +1 or -CnH2n +1; A1 is the soft segment comprising carbon 1 to 14; A2, A3 and A4 are respectively linkage group with conjugated structure; M is one of Al, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. The product is prepared by taking the liquid crystal polymer containing carboxylic acid group as ligand and the metal ion as central ion, and adding carboxylic acid molecule to synthesize bonded metal liquid crystal polymer. The complex liquid crystal polymer not only maintains good liquid crystal performance, but also has excellent fluorescence property.

The invention discloses a dual-response magnetic nano particle with fluorescence and a preparation method thereof, belonging to the technical field of functional polymer materials. An existing response magnetic nano particle is smaller in response range and is incapable of tracing mark. A chemical expression formula of the magnetic nano particle is Fe3O4@M(III)-(PNIPAMm-b-PAzoMAn)-TTA (PNIPAM (Poly(N-isopropylacrylamide) and TTA (thenoyltrifluoroacetone), wherein M is Eu<3+>, Tb<3+>, Sm<3+> or Er<3+>, m is equal to 42-132, and n is equal to 5-20. AzoMA and NIPAM (N-isopropylacrylamide) are polymerized to an RAFT (Reversible Addition-Fragmentation chain Transfer) chain transfer agent through an RAFT free radical polymerization method, and M(III)-(PNIPAMm-b-PAzoMAn)-TTA is obtained through a coordination reaction, and then is modified to the surface of a ferriferrous oxide nano particle through an esterification reaction. The dual-response magnetic nano particle is capable of carrying out magnetic separation under the control of the temperature and the light, and has a potential application value in the aspects of biological marking, imaging, artificial muscle and the like.

The invention relates to a rare-earth doping modified polyester material of its process for preparing. In the invention, adding rare-earth alkoxide compound as a doping material and elastomeric polymer, polyester as the carrier resin to form the rare-earth alkoxide compound masterbatch, doping the said masterbatch into polyester melt in the polyester slice melting process, using the coordination structure characteristic so-called 'thermal regime cross-linking' generated by rare-earth metallic ion energy and the coordination groups such as benzene ring, carbon-to-carbon double bond, ketonic oxygen and nitrogen nitril of the polymer macromolecular to make the modified polyester has the toughness in wider temperature range and increase the stiffness, solvent resistance, thermal stability, weatherability of the material, or put the other functional characteristics such as resistance to ultraviolet radiation, infrared anti-reflection, induced crystallization, antibiosis or fluorescence simultaneously. What the most important is the said rare-earth modified doping resin has the toughening effect in the temperature of between room temperature to minus 30 Deg. C.

The invention relates to a coating having both luminous and fluorescent properties, and a preparation method thereof, and belongs to the technical field of luminous coatings. The coating comprises 1-3% of a carbon dot dioxide fluorescent material, 1-4.5% of an organic long-afterglow luminous material, 27-45% of a silicone-modified waterborne polyurethane emulsion, 18-36% of a pigment, 9-18% of a filler, 0.2-0.9% of a wetting dispersant, 0.2-0.9% of a defoaming agent, 0.1-0.45% of a leveling agent, 0.45-1.8% of a thickener, 1.0-3.0% of a film forming aid, and the balance of water. The components constituting the coating are reasonably selected and the use amounts of all the components are controlled to ensure that the finally prepared coating has an obvious luminous phenomenon and a good adhesion. The coating has both fluorescent and luminous properties, is non-polluting and nontoxic, and is environmentally friendly, so the coating has broad application prospects in the fields of anti-counterfeiting, decoration and public transportation. In addition, the preparation method has the advantages of simple process, easiness in operation, low raw material cost, and suitableness for enlarged production.

The present invention discloses electrochemical preparation and applications of a rare earth coordination polymer film. The preparation method for the rare earth coordination polymer film comprises two ways: (A) an electrodeposition coupled hydrothermal / solvothermal method: preparing a layer of a rare earth oxide film or a layer of a rare earth hydroxide film on the surface of an electric conduction substrate material, and adopting a solvothermal method or a hydrothermal method to grow a layer of a rare earth coordination polymer film on the surface of the rare earth oxide film or the rare earth hydroxide film; and (B) a direct electrochemical deposition method: selecting a suitable electrolyte system, changing overpotential of the related ions on an electrode, and directly depositing on a cathode to obtain the rare earth coordination polymer film. According to the rare earth coordination polymer film, a metal organic framework microporous structure of the coordination polymer can be maintained, regular film morphology can be formed, and the electrochemical preparation can be expected to be applied in gas absorption, molecule ion identification, shape-selective catalysis, material separation and other fields.

The invention discloses a metal porous organic framework material, and a preparation method and applications thereof. According to the preparation method, Zn2+ is taken as a central metal, and 1,3,5-benzenetricarboxylic acid and 2-aminoterephthalic acid are taken as organic ligands to construct the metal porous organic framework material; the crystal form is rhombic dodecahedron; the particle size is about 500<mu>m; the metal porous organic framework material possesses fluorescence performance, and can be used for detection of nitroaromatic compounds. The preparation method comprises following steps: zinc nitrate hexahydrate, 1,3,5-benzenetricarboxylic acid, and 2-aminoterephthalic acid are dissolved in a solvent, an obtained mixture is mixed to be uniform, and is delivered into a high pressure reaction kettle, the high pressure reaction kettle is sealed, reaction temperature is controlled to be 75 DEG C<T<=95 DEG C, reaction time is controlled to be 46 to 52h, after reaction, an obtained product is cooled to room temperature naturally, filtering is carried out so as to obtain a crystal product, and the crystal product is washed with a reaction solvent, and is dried and store. The preparation method is simple, and operation is convenient.

The invention discloses a totally-inorganic halide perovskite material CsPbI3 nanotube, and a preparation method and application thereof. The CsPbI3 nanotube is obtained by a CsPbI3 nanocrystal solution through a microwave reaction; and the molar ratio of Cs to Pb to I in the CsPbI3 nanotube is 1:(1-1.1):(3-3.3). According to the invention, the CsPbI3 nanotube prepared by a microwave method is a brand-new material, and through the method, the nanotube is prepared from perovskite for the first time. The totally-inorganic halide perovskite material CsPbI3 nanotube prepared by the method has fluorescent and photoelectric response, a high synthetic yield, uniform morphology, and high stability; the preparation method is simple and convenient, raw material sources are wide, the costs are low, heating is rapid by adopting the microwave method, and heating is uniform; and the CsPbI3 nanotube has a unique form, structure and electronic property, thus the CsPbI3 nanotube has huge application potentiality in fields such as photoelectrons.

The invention discloses a method for preparing FePt:RE amorphous alloy nano material mixed with rare earth elements, platinum-containing inorganic salt / platinum-containing composition, iron-containing inorganic salt / iron-containing composition and water soluble salt of RE(RE=Eu, Dy, Ce) are used as the reaction precursor, the reaction precursor, organic solvent and phase transfer catalyst crown ether are put into a high pressure kettle, and the needed product is obtained through reaction by making use of the phase transfer among the reactants and the coreduction of the reaction precursor and taking oleic acid as the stabilizer. Based on the invention, alloy nano particles of FePt:Ce, FePt:Dy and FePt:Eu with the particle diameter being 3-5nm can be synthesized, the synthesized alloy nano particles have chemical out-of sequence fcc structure, the amorphous state inclination of the alloy is reinforced by mixing Eu, and the coercive force is greatly enhanced. The alloy nano particles of FePt:Ce and FePt:Dy are processed by backfire at 600 DEG C, the structure thereof carries out phase variation on sequenced L10. At the same time, with the enhanced coercive force, the thermal stability of the FePt:Eu alloy is reinforced by mixing Eu, thus having certain phase variation inhibition effect; in addition, the FePt alloy nano particles are caused to have fluorescence by mixing rare earth elements.

The invention relates the fluorescence accumulation of energy long persistence luminescent material, comprising SrCO3, Al2O3, 75.9-96.0wt% CaCO3, and 0.5-1.5wt% Eu2O3. The raw material comprises 0.1-0.8wt% auxiliary activator chosen from Dy2O3 and Tb4O7, 2-15wt% H3BO3 and 0.1-6.8wt% H2C2O4. The invention also discloses the preparing method. The invention possesses the fluorescent light and long persistence dual natures.

The invention discloses a conjugated polymer containing 7H-pyrrolo [3,4-g] quinoxaline-6,8-diketone and an application thereof. A structural formula is described in the description. The prepared conjugated polymer containing 7H-pyrrolo [3,4-g] quinoxaline-6,8-diketone has fluorescence and broad sunlight absorption range, so that the conjugated polymer containing 7H-pyrrolo [3,4-g] quinoxaline-6,8-diketone can be applied to production of a polymeric light-emitting diode device and active layers of a polymer field effect transistor and a polymer solar battery. The structural formula is described in the description.

The invention belongs to the field of medicine materials, and particularly relates to a coordination copolymer nanometer material as well a preparation method and application thereof. The coordination copolymer nanometer material is characterized in that 1,1'-ferrocene dicarboxylic acid-gadolinium nanoparticles are taken as a core, silicon dioxide is taken as a shell, and the surface of the shell is modified by a functional material. The preparation method comprises the following steps of: preparing the 1,1'-ferrocene dicarboxylic acid-gadolinium nanoparticles by a direct precipitation method, then coating the silicon dioxide on the surface of the magnetic nanoparticles so that the surfaces of the 1, 1'-ferrocene dicarboxylic acid-gadolinium nanoparticles carry a quantity of amidogens while the 1,1'-ferrocene dicarboxylic acid-gadolinium nanoparticles have water solubility, connecting to the surface of the 1,1'-ferrocene dicarboxylic acid-gadolinium nanoparticles through rhodamine isothiocyanate B and an amidogen effect, and finally connecting arginine glycine aspartic acid tripeptide through the amidogens. The coordination copolymer nanometer material is uniform in particle size and has good dispersity, a very good magnetic resonance imaging effect of T1 and T2, luminescent property and a target function; the synthetic process is simple; raw materials are easily available; and environmental pollution is avoided.

The invention relates to an attapulgite clay quantum dot nano-composite fluorescent material and a preparation method thereof, the material comprises inorganic quantum dots and uniformly dispersed nano-attapulgite clay, the quantum dots are positioned in pore paths of the nano-attapulgite clay, and the inorganic quantum dots are zinc oxide, zinc sulfide or cadmium sulfide. The method comprises the following steps: a) adding the nano-attapulgite clay into water solution of metal ion salt, carrying out magnetic stirring for 1-60h at the temperature of 20-80 DEG C, carrying out centrifugation on solids, cleaning with deionized water, drying and obtaining attapulgite clay / metal ions; and b) taking the attapulgite clay / metal ions, carrying out reaction on the attapulgite clay / metal ions and a negative ion source for 1-60h at the temperature of 20-80 DEG C, carrying out the centrifugation on the solids, washing, drying and obtaining the attapulgite clay quantum dot nano-composite fluorescent material. The prepared attapulgite clay quantum dot composite material is the one-dimensional nano-material with uniform size and integration of the fluorescence property of the quantum dots and the water solubility of the attapulgite clay, fluorescence is derived from the intrinsic luminescence of the quantum dots in the pore paths, and the size of the quantum dots is controllable.

The invention belongs to the field of chemistry and nanometer material science, and specifically discloses a preparation method of a fluorescent ASA Pickering emulsion and application thereof. The fluorescent ASA Pickering emulsion is mainly prepared by using water, carbon quantum dots, organic modified montmorillonite and ASA as raw materials. The mass ratio of the carbon quantum dots to the organic modified montmorillonite is 1: (2-4); and the mass ratio of the organic modified montmorillonite to the ASA is (2-4): 100. By using the carbon quantum dot / organic modified montmorillonite stabilization system for preparation of ASA Pickering, the adverse effects of a surfactant on water and soil can be avoided, and eco-environmental stress can be reduced. The ASA Pickering emulsion prepared bythe emulsion stabilization system has fluorescence property. By the use of the emulsion for internal sizing of paper sheet, the degree of paper sizing can be remarkably enhanced, and the internal sizing effect of the ASA Pickering emulsion is better.

The invention belongs to the technical field of organic synthesis, in particular to a pyrene type asymmetrical disc-like luminous compound and a preparation method thereof. The general structural formula of the compound is shown in the specifications, wherein R1 is shown in the specifications, and n is an integer ranging from 4 to 20; and R2 is shown in the specifications, and n is an integer ranging from 4 to 20. The preparation method of the compound comprises a pyrene Friedel-Crafts acylation reaction, an intermediate product bromination reaction, a Sonogashira coupling reaction, a trimethyl silicane removing reaction and a bromination chain linking reaction. The pyrene type asymmetrical disc-like luminous compound prepared with the method takes a disc as an axis and an asymmetrical bar-shaped molecular chain as an axis, has very high fluorescence and luminous efficiency, and has wide application.

The invention discloses a Fe-MOFs chemiluminescence-fluorescence double-response immunosensor. The immunosensor comprises detection antibodies and a paper chip; the detection antibodies are labeled byFe-MOFs; the detection regions of the paper chip are connected with capture antibodies; the non-specific sites of the paper chip are sealed through a sealing agent; and the Fe-MOFs are a metal organic frame material formed by Fe<3+> and 2-aminobenzene-1,4-dicarboxylic acid. According to the immunosensor disclosed by the invention, the Fe-MOFs are used as signal molecules, have relatively high stability and have relatively good water solubility; and in addition, the material not only has fluorescent performance, but also can catalyze a luminal-H2O2 chemiluminiscence system to generate chemiluminiscence. When the immunosensor disclosed by the invention is used for immunoreaction, two modes of the signal output of the detection result of the immunosensor can be provided, in particular, detection can be performed through either a fluorescence method or a chemiluminescence method, the two detection modes can be flexibly selected, and therefore, detection modes can be enriched, and the useof the two modes can further improve the accuracy of the detection result.

The invention provides a method for quickly preparing a carbon-oxygen co-doped boron nitride room-temperature phosphorescent material by microwave heating, and the method comprises the following steps: adding a carbon-nitrogen source into a boric acid water solution to obtain a mixed solution, carrying out microwave heating on the mixed solution to react, cooling, washing and drying to obtain thecarbon-oxygen co-doped boron nitride room-temperature phosphorescent material. The method has the advantages of convenient operation of the preparation process, low device requirements, short reactiontime, mild reaction conditions, simple post-treatment, environmental protection, easily available reaction raw materials, low cost, and easy batch production. The obtained carbon-oxygen co-doped boron nitride room-temperature phosphorescent material shows a green room-temperature phosphorescent phenomenon in a solid state, and the obtained carbon-oxygen co-doped boron nitride has good water solubility and has blue fluorescence in aqueous solution and powder states. The obtained carbon-oxygen co-doped boron nitride room-temperature phosphorescent material can be used for display materials andhigher-level anti-counterfeiting and information encryption.

The invention provides a silicon dioxide and titanium dioxide composite material containing carbon dots and a preparation method of the material. The silicon dioxide and titanium dioxide composite material containing the carbon dots comprises a carbon dot and mesoporous silica composite material of a channel structure and nano titanium dioxide particles attached to the surface of the composite material. The preparation method includes the steps that mesoporous silica and a solution containing citric acid and ethylenediamine are mixed and subjected to ultrasonic dispersion to obtain turbid liquid, the turbid liquid is subjected to normal-pressure microplasma discharge treatment, then the product is subjected to centrifugal separation, solid washing and vacuum drying, and the carbon dot and mesoporous silica composite material is obtained; a titanium precursor solution is mixed with the carbon dot and mesoporous silica composite material, the mixture is dropwise added into an ethyl alcohol solution containing glacial acetic acid, stirring continues, the product is dried, and the silicon dioxide and titanium dioxide composite material containing the carbon dots are obtained. The preparation method is simple, high in efficiency and low in energy consumption, and the prepared composite material is fluorescent, can be used for the field of heavy metal ion adsorption catalysis, and has a good adsorption catalysis effect especially on uranyl ions.

The invention discloses a preparation method of a carboxybenzaldehyde 1,3-propane diamine Schiff base copper complex. The method comprises the following steps: by using carboxybenzaldehyde and ethylenediamine as raw materials, glacial acetic acid as a catalyst and absolute methanol as a solvent, carboxybenzaldehyde 1,3-propane diamine Schiff base is prepared through a solution method; by using thecarboxybenzaldehyde 1,3-propane diamine Schiff base, and copper acetate monohydrate as raw materials, and the absolute methanol as a solvent, the carboxybenzaldehyde 1,3-propane diamine Schiff base copper complex is prepared through a hydrothermal method. The method disclosed by the invention has the advantages of simple process, good reproducibility and higher yield; the prepared carboxybenzaldehyde 1,3-propane diamine Schiff base and the carboxybenzaldehyde 1,3-propane diamine Schiff base copper complex both have fluorescence properties, and have potential application values in the fields of fluorescent probes and fluorescence analysis.

The invention discloses a preparation method of a cadmium metal organic complex. The preparation method is characterized by comprising the steps: adding a mixture of 0.2mmol of 6-aminonicotinic acid and 0.1mmol of Cd(NO3)2.4H2O into 10ml of distilled water, adding a NaOH solution dropwise until a pH value is 2-4, fully mixing, putting a mixture into a stainless steel reaction kettle with polytetrafluoroethylene as a liner, carrying out hydrothermal reaction with 2.9-3.2d under the condition of 430-440K, and slowly cooling to the room temperature to obtain a colorless tabular crystal, i.e., the cadmium metal organic complex. The cadmium metal organic complex has the fluorescence and can be applied to fluorescent materials.

The invention belongs to the field of biomedicine, relates to a nanoparticle and a preparation method and application thereof, and in particular relates to a peptide functionalized metal-loaded porphyrin phase-change nanoparticle and a preparation method and application thereof. The nanoparticle comprises a shell membrane formed by liposome, and liquid fluorocarbon encapsulated in the shell membrane, wherein a tumor homing cell-penetrating peptide is covalently attached to the shell membrane, and the inside of the lipid bilayer of the liposome is encapsulated with a contrast agent. The nanoparticle has the function of penetrating the tumor blood vessel barrier and the tumor interstitial barrier, can penetrate deep into tumor tissues, and more effectively realizes the diagnosis and treatment of tumors. The nanoparticle of the scheme can be applied in the development and preparation of drugs for tumor diagnosis or treatment.

The invention discloses a method for preparing a polymer composite material with fluorescent property. The method comprises the following steps of: treating a precipitate obtained by reacting zinc nitrate solution and ammonium carbonate solution in a high pressure reactor under the hydrothermal condition at the temperature of 200 DEG C for 20 to 24 hours to prepare basic zinc carbonate; and blending hydrogenated carboxylated nitrile-butadiene rubber with the basic zinc carbonate by using a twin-roll mill, and performing hot pressing and vulcanizing to prepare the polymer composite material with the fluorescent property. The preparation process does not need any organic solvent, and the prepared polymer composite material with the fluorescent property has an ultraviolet light emission peak at 353 nm of a fluorescence emission spectrum.

The invention discloses a terpolymer containing a triazol isoindol-5,7(2H,6H)-dione unit and a preparation method and application thereof. The preparation method comprises the following step of enabling a monomer of an electron donor unit and a monomer containing the triazol isoindol-5,7(2H,6H)- dione unit to generate still coupling copolymerizing reaction, so as to obtain the ternary copolymer containing the triazol isoindoline-5,7(2H,6H)-diketone unit. The ternary copolymer containing the triazol isoindol-5,7(2H,6H)-dione unit has the advantages that the fluorescence property is realized; the absorbing range of sunlight is wider; the terpolymer can be well applied to the fields of preparation of light emitting layers of polymer light emitting diodes, polymer field effect transistors and activating layers of polymer solar batteries.

The invention relates to a fluorescent alkenyl succinic anhydride (ASA) sizing agent for papermaking and a preparation method of the fluorescent ASA sizing agent for papermaking, belonging to the technical field of sizing agent for papermaking. According to the fluorescent ASA sizing agent for papermaking, firstly, a carbon quantum dot is added into the ASA sizing agent, so that ASA sizing emulsion which can be used as the fluorescent sizing agent for papermaking and effectively improves the water resistance of paper is successfully prepared; a new emulsion stabilizer is provided for the ASA sizing agent, and the stable emulsifying agent enables the sizing agent to have fluorescence property and high sizing efficiency; furthermore, the emulsion stabilizer serving as the carbon quantum dot has the advantages of being few in dosage, non-toxic, low in cost, etc. The fluorescent ASA sizing agent for papermaking adopts a simple preparation technology, and a surface active agent, a polymer polyelectrolyte and a dye type fluorescent agent do not need to be added into the fluorescent ASA sizing agent.

The invention discloses multi-component copolyamide containing a side group and a preparation method and application thereof. The side group can be a triazines side group or a triphenylamine side group; the multi-component copolyamide containing the side group has excellent performance; the regularity of the molecular chain is effectively reduced, the crystallinity of the copolyamide is reduced, and accordingly, the solubility of the polymer is greatly improved. The polymer can be dissolved in NMP, DMSO, DMAc, NMP-LiCl, DMF-LiCl and other organic solvents, and solution processing can be conducted. The mechanical property of the thin film prepared from the polymer is excellent, and the thin film is expected to be applicable to the field of high-strength materials. The polymer is high in transparency, has fluorescence, and is expected to be applicable to the field of optical materials. The preparation method is simple and mild in condition, convenience is brought to purification, the monomer can be directly purchased, the price is low, and industrialization is facilitated. The modified multi-component copolyamide can be used in the field of textiles, the military field of ballistic helmets and the traffic field of tires.

The invention discloses a nanomaterial for enrichment and purification of pathogenic microorganisms and a preparation method of the nanomaterial, wherein the chemical structure of the nanomaterial is represented as SiO2@Fe3O4@SiO2@CdTe@CMCS. The nanomaterial is a core-shell multifunctional magnetic nanomaterial which is compatible with functions of targeting delivery, fluorescence labeling and specific binding, and is capable of rapidly and effectively enriching pathogenic microorganisms when diagnosing infectious diseases in the field.