353 results about "Salicylaldehyde" patented technology

The invention relates to the field of coatings, and discloses an outer wall light radiation heat preservation and heat insulation decorative sheet and a preparation method thereof.A radiation refrigeration layer on the surface of the outer wall light radiation heat preservation and heat insulation decorative sheet comprises modified acrylate resin, silicon dioxide, ground calcium carbonate, talcum powder, modified hollow glass beads and auxiliaries; the modified acrylate resin is prepared by copolymerizing perfluorooctyl ethyl acrylate, methyl methacrylate, modified isocyano ethyl methacrylate and vinyltriethoxysilane, and the modified isocyano ethyl methacrylate is prepared by using salicylaldehyde and benzothiazole-2-formaldehyde as well as 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate as an initiator and using 2, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate as an initiator. The preparation method comprises the following steps: reacting amino groups at two ends of 1, 5-naphthylenediamine with DOPO, carrying out nucleophilic addition reaction with DOPO, and grafting with isocyano ethyl methacrylate. The modified hollow glass beads are prepared by using tetrabutyl titanate as a titanium source through a sol-gel method, and the prepared radiation refrigeration layer has the super-amphiphobic self-cleaning effect, the radiation refrigeration effect is good, and meanwhile the flame retardant property and the antibacterial effect are excellent.

The invention discloses high-performance unsaturated polyester resin, and relates to the field of polyester resin. When the high-performance unsaturated polyester resin is prepared, diatomite and a silver nitrate solution are uniformly mixed to obtain silver-loaded diatomite; then, the silver-loaded diatomite is subjected to a reaction with 3-aminopropyltrimethoxysilane and 3-allyl salicylaldehyde in sequence, and modified diatomite is obtained; the preparation method comprises the following steps: reacting tris (dimethylaminopropyl) amine with 3-chloropropene to obtain a cross-linking monomer; 2-formyl pyridine and 3-aminopropane phosphoric acid are subjected to a reaction, and a flame-retardant monomer is obtained; reacting terephthalic acid, fumaric acid, 1, 3-propylene glycol and a flame-retardant monomer to obtain modified unsaturated polyester resin; and uniformly mixing the modified unsaturated polyester resin, the modified diatomite and a crosslinking monomer to obtain the high-performance unsaturated polyester resin. The prepared high-performance unsaturated polyester resin has excellent flame retardance, antibacterial property, antistatic property, anti-aging property and self-repairing property.

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

The invention discloses a natural plant-based spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the natural plant-based spinning yarn is prepared, palm fibers are pretreated with a sodium chlorite solution and a sodium hydroxide solution, and pretreated palm fibers are prepared; reacting the pretreated palm fibers with ammonium dihydrogen phosphate to prepare phosphorylated modified palm fibers; reacting the phosphorylated modified palm fibers with calcium nitrate, diammonium hydrogen phosphate and allylphosphonic acid to grow hydroxyapatite in situ, so as to prepare hydroxyapatite composite palm fibers; 4-allyl thiosemicarbazide reacts with salicylaldehyde to prepare an antibacterial agent intermediate, and the antibacterial agent intermediate is complexed with copper ions to prepare an antibacterial agent; grafting an antibacterial agent and an anti-aging agent on the hydroxyapatite composite palm fibers to prepare modified palm fibers; and spinning the modified palm fiber to obtain the natural plant-based spun yarn. The prepared natural plant-based spinning yarn has the advantages of being high in breaking strength, antibacterial, flame-retardant and anti-aging.

The invention discloses an OMTD photoelectric mapping transparent display film with adjustable light transmittance and a preparation method, and belongs to the technical field of transparent display films. The transparent display film comprises an electric control dimming film layer, a fluorescent layer, an adhesive layer and a release material layer, wherein the fluorescent layer comprises the following raw materials in parts by weight: 80-100 parts of polyurethane resin, 2-5 parts of a fluorescent agent, 3-6 parts of a dispersing agent, 4-8 parts of a modified anti-aging agent, 1-10 parts of a curing agent and 200 parts of a solvent; according to the invention, p-phenylenediamine and 4-(diethylamino) salicylaldehyde react to prepare a fluorescent small molecule substance, and then the fluorescent small molecule substance is introduced into a polyurethane chain to finally prepare the fluorescent agent. The prepared transparent display film has excellent fluorescence performance, transparency and anti-aging performance.

The invention discloses a cation modified soft PVC membrane material and a preparation method thereof, and relates to the technical field of high polymer materials. When the cation modified soft PVC membrane material is prepared, pre-modified polyvinyl chloride and an allyl salicylaldehyde Schiff base ligand react to prepare modified polyvinyl chloride; the preparation method comprises the following steps: carrying out a reaction on 5-oxo-2, 3-dihydro-5H-thiazolo [3, 2-a] pyridine-3, 7-dicarboxylic acid and N-(2-ethoxyl) maleimide to prepare a bismaleimide ultraviolet absorbent; reacting the pre-modified zinc oxide with 2-chloromethyl furan to obtain modified zinc oxide; and mixing the modified polyvinyl chloride, the modified zinc oxide, a bismaleimide ultraviolet absorbent, zinc acetate, diisononyl phthalate, epoxidized soybean oil and calcium stearate, plastifying, calendering, cooling and rolling to prepare the cation modified soft PVC membrane material. The cation modified soft PVC membrane material prepared by the invention has excellent antibacterial, anti-aging and self-repairing properties.

The invention relates to the field of sealing strips, and discloses a high-foaming low-density composite sealing strip material and a preparation method thereof.The sealing strip material is prepared from ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, modified composite filler, zinc oxide, stearic acid, paraffin oil, calcium oxide, an accelerant, sulfur and a foaming agent; the modified composite filler is prepared by performing acylating chlorination modification on a flame-retardant additive and a modified ultraviolet absorbent by using oxalyl chloride and then grafting with an aminated composite filler, the aminated composite filler is prepared by modifying silicon dioxide and titanium dioxide by using an amino silane coupling agent, and the flame-retardant additive utilizes 9, 10-di-tert-butyl-4-methylphenol. The ultraviolet absorbent is prepared by grafting 2, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, salicylaldehyde and pentaethylenehexamine which are used as raw materials, and the modified ultraviolet absorbent is prepared by reacting 2-(2, 4-dihydroxyphenyl)-2H-benzotriazole with phenylphosphonic dichloride. By adding the modified composite filler, the material is endowed with excellent mechanical properties, flame retardance and ultraviolet aging resistance.

The invention belongs to the technical field of organic synthesis, and particularly relates to a salicylaldehyde hydrazone bridged organic boron photoinitiator as well as a preparation method and application thereof. The structural formula of the salicylaldehyde hydrazone bridged organic boron photoinitiator is as shown in formula I, wherein R is H or halogen atom; the salicylaldehyde hydrazone bridged organic boron photoinitiator has a vertical spatial configuration formed by a seven-membered ring and a six-membered ring. A framework of the salicylaldehyde hydrazone bridged organic boron photoinitiator has a unique vertical spatial configuration, generation of a spinning triplet state can be effectively promoted through orbital angular momentum regulation and control, and a more favorable excited state characteristic is provided for a photoinitiation process. The absorption wavelength and the emission spectrum of an LED light source are well overlapped, and high reaction activity can still be kept under the conditions of low irradiation intensity (lt, 60 mW / cm) and short exposure time (lt, 60 s). In addition, the preparation method of the salicylaldehyde hydrazone bridged organic boron photoinitiator is simple and efficient, the raw material cost is low, and the salicylaldehyde hydrazone bridged organic boron photoinitiator has a wide application prospect.

The invention relates to the field of printing inks and discloses a wear-resistant and scratch-resistant printing ink, a preparation method thereof, and an application thereof. The printing ink comprises: a modified aqueous polyurethane emulsion, a modified mica sheet, a pigment, an additive, and deionized water; the modified aqueous polyurethane emulsion is prepared by introducing a double-terminal hydroxyl chain extender into a polymer; the double-terminal hydroxyl chain extender is reacted with a Schiff base intermediate obtained by reacting salicylaldehyde and p-aminobenzyl alcohol and isocyanoethyl methacrylate, and the obtained double-bonded Schiff base intermediate is reacted with 1,1,3,3-tetramethyldisiloxane to prepare the ink; the modified mica sheet is reacted with triethylenetetramine, formaldehyde, and acetone, and then formaldehyde is added under alkaline conditions for polycondensation, the obtained cationic polymer and glutaraldehyde are prepared into the cationic mica sheet, and finally polyaniline is grown on the surface of the mica sheet through interfacial polymerization. The ink prepared by the invention has good adhesion, high hardness, and excellent water resistance, wear resistance, heat resistance, antistatic properties, and antibacterial properties.

The invention discloses a glass fiber modified polyurethane material and a preparation method thereof, and relates to the technical field of high polymer materials. When the glass fiber modified polyurethane material is prepared, ethanol removal and polycondensation are carried out on 3-chloropropylmethyldiethoxysilane and salicylaldehyde silane, and 1, 3-bis (3-hydroxypropyl) tetramethyldisiloxane is used for blocking, so that a siloxane oligomer is prepared; the preparation method comprises the following steps: polymerizing polyether glycol, a siloxane oligomer, 4, 4 '-dihydroxyazobenzene and isophorone diisocyanate to prepare polyurethane; the pre-modified glass fiber and 1-(2-hydroxyethyl) imidazole are subjected to a reaction, and modified glass fiber is prepared; mixing polyurethane, the modified glass fiber and zinc nitrate hexahydrate, and performing compression molding to obtain the glass fiber modified polyurethane material. The glass fiber modified polyurethane material prepared by the invention has excellent anti-aging, antibacterial, flame-retardant and mechanical properties.

A volatile composition dispenser includes a reservoir comprising a volatile composition; and an evaporative surface in fluid communication with the reservoir. The volatile composition comprises a first fragrance material that is a meta-(C1-C4 alkoxy)salicylaldehyde, and the first fragrance material is present in an amount of at least 0.0005%, by weight of the volatile composition. A process of treating an environment with a volatile composition dispenser includes providing a volatile composition dispenser and providing the meta-(C1-C4 alkoxy)salicylaldehyde to the environment. A weight loss of the volatile composition over less than 11 days ranges from 7% to 20%.

The embodiment of the invention provides a preparation method of methylene-bridged substituted phenol substituted by hydroxyl ortho-hydroxymethyl, and the preparation method comprises the following steps: A1, reacting substituted phenol with formaldehyde in the presence of a Lewis acid catalyst to prepare a substituted salicylaldehyde compound (2); a2, carrying out condensation reaction on the substituted salicylaldehyde compound (2) in a system containing formaldehyde and a Bronsted acid catalyst to prepare a methylene-bridged substituted salicylaldehyde compound (3); and A3, reducing the methylene-bridged substituted salicylaldehyde compound (3) to prepare methylene-bridged substituted phenol (4) with hydroxyl ortho-hydroxymethyl substituted. According to the embodiment of the invention, the yield and the chemical purity of the prepared methylene-bridged substituted phenol substituted by hydroxyl ortho-hydroxymethyl can be improved. According to other embodiments of the invention, the invention also provides a preparation method of the polyphenol compound containing multiple phenol units.

The invention discloses a phosphorus-silicon type Schiff base derivative flame retardant and a preparation method and application thereof.The preparation method comprises the steps that salicylaldehyde and 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane react to obtain silicon-containing Schiff base, then P-H on hypophosphorous acid substances and-C = N-on the silicon-containing Schiff base are subjected to an addition reaction, and the phosphorus-silicon type Schiff base derivative flame retardant is obtained. The phosphorus-silicon type Schiff base derivative flame retardant is prepared. The flame retardant contains a plurality of groups such as-OH,-NH-and the like, can achieve molecular-level dispersion in a high polymer material, and plays an efficient flame-retardant role. The flame retardant has a gas-phase and condensed-phase dual-phase flame retardant effect: in the gas phase, the effects of dilution and free radical capture are exerted; and in a condensed phase, char formation can be promoted and a barrier effect can be exerted. In addition, due to the existence of organic silicon, a compact carbon layer with a specific-Si-O-bond or-Si-C-bond of siloxane can be generated during combustion, the protection effect of oxygen isolation and heat insulation is achieved, and the condensed phase flame retardant effect is enhanced. The phosphorus-silicon type Schiff base derivative flame retardant has a wide application prospect and can be applied to flame-retardant modification of polyurethane and epoxy resin.

The invention relates to the field of copper plating solutions, and provides a low-stress chemical copper plating solution for a glass substrate and a preparation method of the low-stress chemical copper plating solution. The invention discloses a copper ion carboxyl chelate, which is composed of copper ion carboxyl chelate, 2, 2 '-bipyridine, polyethylene glycol-8000, lauryl sodium sulfate, a sodium carbonate buffer agent, deionized water and a pretreatment solvent, and the copper ion carboxyl chelate is prepared by chelating a polyacrylate-itaconic acid copolymer with copper chloride and then carrying out stepwise cross-linking with epichlorohydrin and N, N'-methylene bisacrylamide. The copper-bis-salicylaldehyde ethylenediamine complex is obtained by reacting bis-salicylaldehyde ethylenediamine with copper acetate, crystallizing and purifying. The preparation method comprises the steps of solvent premixing, chelating activation, staged additive integration, pH dynamic regulation and control and plating solution purification, through nitrogen protection, high-shear stirring and accurate pH regulation, the problems that a traditional chemical copper plating layer is high in stress and poor in conductivity are solved, and the method is suitable for high-precision glass substrate surface metallization.

The invention relates to the technical field of eicosapentaenoic acid ethyl ester soft capsules, and discloses a composition containing eicosapentaenoic acid ethyl ester, a soft capsule type preparation, a preparation process and application, eicosapentaenoic acid ethyl ester compounded with various antioxidant auxiliary material components is used as a content, gelatin and Arabic gum are used as wall materials, and the soft capsule type preparation is prepared by compounding the eicosapentaenoic acid ethyl ester and the soft capsule type preparation. A safe and non-toxic polyhedral oligomeric silsesquioxane (POSS) framework compound which is independently researched and synthesized and has a salicylaldehyde group functional group is used as a curing agent, and safe and non-toxic titanium dioxide which is independently researched and synthesized and has the surface modified with the salicylaldehyde group functional group is used as an opacifying agent; and preparing the ethyl eicosapentaenoate soft capsule preparation by adopting a complex coacervation method. The eicosapentaenoic acid ethyl ester soft capsule type preparation prepared by the invention not only has excellent stability under high-temperature and high-humidity conditions, but also has the peroxide value of eicosapentaenoic acid ethyl ester as low as 1.02 meq / kg and the content of eicosapentaenoic acid ethyl ester as high as 98.79%.

The invention discloses a culture medium for promoting growth of bifidobacteria and application of the culture medium. 1L of the culture medium is prepared from the following components: 6.2 to 7.4 g of # imgabs0 # peptone, 1.5 to 2.5 g of soy peptone, 3.0 to 3.8 g of yeast extract powder, 1.0 to 2g of beef extract powder, 8.5 to 9.5 g of digestive serum powder, 0.5 to 1.5 g of bovine liver extract powder, 1.5 to 2.0 g of monopotassium phosphate, 1.5 to 2.5 g of sodium chloride, 0.1 to 0.3 g of L-cysteine, 0.1 to 0.3 g of sodium thioglycolate, 0.05 to 0.12 g of growth promoting factors and the balance of water. The growth promoting factor is periplocin, syringaldehyde, 4-methoxysalicylaldehyde, astragaloside, calycosin or formononetin. The raw materials of the culture medium are easy to obtain, the growth promoting effect on bifidobacterium is good, and time and cost are saved. Bifidobacterium grows fast in the culture medium provided by the invention.

The invention discloses quick heat-conducting precoated sand and a preparation process thereof, and relates to the technical field of precoated sand, the quick heat-conducting precoated sand comprises the following raw materials by weight: 100-105 parts of crude sand, 6-8 parts of a modified resin prepolymer, 2-4 parts of modified POE, 3.5-4.5 parts of a lubricant, and 3-5 parts of nano silicon nitride. The modified POE has a relatively strong high-temperature toughening effect on the modified resin prepolymer, can also form chemical crosslinking with the modified resin prepolymer, and has relatively strong compatibility with other raw materials in the precoated sand. The modified resin prepolymer is obtained by heating and ring-opening polymerization of a benzoxazine monomer obtained by reaction of 5-nitrosalicylaldehyde, 2, 4-bis (trifluoromethyl)-5-pyrimidinyl ethyl formate, paraformaldehyde, furfuryl amine and the like, the curing temperature of the modified resin prepolymer is reduced, the thermal stability is improved, and improvement of the high temperature resistance of the precoated sand is facilitated.

Embodiments of the present disclosure describe metal organic framework (MOF)-like composite material (MOFite) including a salicylaldehydate-based iron metal organic framework composition and graphite, a lithium-ion battery including a cathode and an anode including a salicylaldehydate-based iron metal organic framework composition and graphite, and a scalable synthesis methods for salicylaldehydate-based metal-organic frameworks (SA-MOFs), specifically Fe-Tp, and their applications in lithium-ion batteries (LIBs).

The preparation method comprises the following steps: in the presence of a cobalt catalyst and a salicylaldehyde Schiff base ligand, carrying out carbonyl synthesis reaction on C5-C20 olefin and synthesis gas at a certain reaction temperature and pressure to generate C6-C21 aldehyde. The salicylaldehyde Schiff base coordination cobalt catalyst is introduced, the electronic structure of the catalyst is changed, the capacity of the catalyst for adsorbing and activating olefin and synthesis gas is improved, the reaction temperature and pressure can be reduced, the high-carbon aldehyde yield is greatly increased, and the method has good application prospects and industrial application potential in the field of petrochemical engineering.

The invention discloses an antibacterial sanitary towel surface layer material and a sanitary towel, and relates to the technical field of daily necessities. When the antibacterial sanitary towel surface layer material is prepared, bamboo pulp fibers and a salicylaldehyde Schiff base calcium complex react to prepare modified bamboo pulp fibers; the preparation method comprises the following steps: enabling 3-imidazole-1-propionic acid and 1-chlorohexane to react to prepare propionyl imidazolium salt; the preparation method comprises the following steps: carrying out reaction on China hemp fibers and propionyl imidazolium salt to prepare modified China hemp fibers; the preparation method comprises the following steps: polymerizing vinyl perfluoro caprylate and 5-allylimidazolidine-2, 4-diketone, and chloridizing with sodium hypochlorite to obtain an antibacterial water-repellent finishing agent; the modified bamboo pulp fibers and the modified China hemp fibers are subjected to opening, carding, lapping and overlapping respectively and then subjected to spunlace reinforcement, a composite surface layer is prepared, the composite surface layer is coated with an antibacterial water-repellent finishing agent and dried, and the antibacterial sanitary towel surface layer material is prepared. The antibacterial sanitary towel surface layer material prepared by the invention has excellent antibacterial property and anti-back-permeation property.

This invention provides a polynuclear metal cluster based on salicylaldehyde acetal-2-thiophenol ligand, its preparation method, and its application. The chemical formula of the polynuclear metal cluster is Co4(C 13 H9NOS)6·2CH3CN·CH3OH, where C 13 H9NOS is salicylaldehyde acetal-2-thiophenol, with Co forming a six-coordinate octahedral configuration with N, O, and S. The salicylaldehyde acetal-2-thiophenol ligand in the polynuclear metal cluster of this invention can effectively stabilize the active center of metallic cobalt, resulting in a polynuclear metal cluster with significant OER activity and broad prospects for practical applications.

The invention relates to a fertilization process for fruit tree planting, and belongs to the technical field of fruit tree planting processes. The fertilizing process comprises the following steps: digging a fertilizing ditch on one side of a main stem of a fruit tree, applying a slow-release fertilizer, and covering soil after the slow-release fertilizer is applied. The distance between the fertilization furrows and main stems of the fruit trees is 30-50 cm, the fertilization amount of the slow-release fertilizer is 5-10 kg per fruit tree, and the slow-release fertilizer is prepared from graphene, amino acid, urea, monopotassium phosphate, calcium nitrate and modified salicylaldehyde. According to the invention, on the basis of the slow-release fertilizer, a fertilization process during planting is reasonably blended, and the fertilization distance and the fertilization amount of the slow-release fertilizer are subjected to targeted range matching, so that the slow-release fertilizer can be effectively absorbed by a root system, and waste of the fertilizer is avoided. The proper fertilization distance can encourage the outward expansion of the root system, so that the healthy growth of the root system is facilitated, and the stress resistance of the fruit tree is enhanced. The reasonable fertilizing amount can further promote the growth of fruit trees and improve the yield of the fruit trees and the quality of fruits.

The invention belongs to the technical field of chemical pharmaceuticals, and discloses a synthesis process of a benzazin heavy key intermediate 2-ethyl benzofuran, which comprises the following steps: step S10, taking salicylaldehyde SM1 and chloroacetone SM2 as initial raw materials, and adding an alcohol solvent and a strong alkali solution to synthesize a compound A; step S20, carrying out hydrogenation reduction reaction on the compound A to obtain 2-ethylbenzofuran TM; raw materials used in the scheme are cheap and easy to obtain, reaction steps are few, and synchronous recovery of the solvent is facilitated; reaction conditions are mild, equipment requirements are low, and production cost is low; the method is simple to operate, small in environmental pollution and suitable for industrial large-scale production; the invention solves the problem that the existing benzarone synthesis process is difficult for industrial scale production.

The invention belongs to the technical field of high polymer chemistry and material science, and particularly relates to application of a salicylaldehyde Schiff base chiral polymer in iron and copper ion detection, and the structural formula of the salicylaldehyde Schiff base chiral polymer is one of the following structures shown in the specification. . The salicylaldehyde Schiff base chiral polymer has high selectivity to copper ions and iron ions, and qualitative detection of the copper ions and the iron ions can be achieved according to changes of ultraviolet absorption spectrums, digital circular dichroism spectrums and fluorescence spectrums before and after coordination of the salicylaldehyde Schiff base chiral polymer with the copper ions and the iron ions.

The present invention discloses a class of perfluorophenyl-substituted salicylaldimine nickel complexes, a preparation method thereof, and an application thereof in highly active catalytic norbornene polymerization. The preparation method includes the following steps: first metallizing a neutral ligand with sodium hydride, then reacting it with a nickel metal raw material compound in an organic medium, and then obtaining the target compound through filtration, concentration, and recrystallization steps. The perfluorophenyl-substituted salicylaldimine nickel complex of the present invention is a highly efficient norbornene addition polymerization catalyst. The perfluorophenyl-substituted salicylaldimine nickel complex of the present invention has very obvious advantages: the raw materials are easily available, the synthesis route is simple, the product yield is high, the polymerization performance can be regulated by adjusting the substituent structure, and it has a wide application prospect. Its structural formula is shown as follows:

The invention discloses a high-load cobalt monatomic catalyst with a three-dimensional confinement structure as well as a preparation method and application of the high-load cobalt monatomic catalyst. A three-dimensional cyclodextrin-based covalent organic framework 3D-CD-COF, which is constructed by seven-(6-amino-6-deoxy)-beta-cyclodextrin (7ACD) and aromatic dicarboxaldehyde (terephthalaldehyde or 4, 4 '-biphenyl dicarboxaldehyde), is used as a carrier, multiple coordination sites are constructed through salicylaldehyde grafting, and high-loading anchoring of cobalt single atoms is realized; cobalt single atoms are uniformly dispersed in a three-dimensional intercommunicated pore channel in a CoN1O3 coordination form, the loading capacity reaches 13.0-14.0%, and a three-dimensional confinement structure can inhibit four-electron oxygen evolution side reaction. The catalyst has high hydrogen peroxide Faraday efficiency and high yield, compared with Co-CD without a three-dimensional confinement structure, the activity and selectivity are remarkably improved, and an efficient technical scheme is provided for electrochemical preparation of hydrogen peroxide.

The invention relates to the field of paperboard, in particular to a multi-layer composite waterproof and explosion-proof corrugated paperboard and a preparation method thereof. An explosion-proof film layer, a foam board layer, a reinforcing fiber mesh layer and a corrugated paperboard layer are sequentially bonded with a green flame-retardant adhesive to obtain a corrugated paperboard, and a modified halloysite nanotube and a composite waterborne polyurethane are compounded as a protective coating to be coated on the corrugated paperboard; cross-linked oxidized starch is compounded with the composite waterborne polyurethane and the modified halloysite nanotube to obtain a flame-retardant adhesive; the halloysite nanotube is modified by firstly amminating its surface with 3-aminopropyltriethoxysilane, and then graphene oxide is loaded on its surface by electrostatic self-assembly to obtain a hybrid flame-retardant filler, namely, a composite halloysite nanotube, which is then modified with aspartic acid and then reactively grafted with a salicylaldehyde Schiff base flame retardant containing a hydroxyl group.

The present invention relates to the technical field of luminescent materials, and specifically relates to a transition metal antibacterial fluorescent waterborne polyurethane material, a preparation method thereof, and an application thereof. First, salicylaldehyde and ethanolamine are used as reactants to obtain Schiff base salicylaldehyde ethanolamine by reflux heating; salicylaldehyde ethanolamine is used as a ligand to reflux with zinc acetate to prepare a blue fluorescent transition metal complex. The polymer polyol and isocyanate are reacted and condensed, and then a hydrophilic group is introduced through a chain extension reaction and then reacted with transition metal complex powders in different proportions, and they are incorporated into the polyurethane molecular chain segment, and then emulsified and the organic solvent is removed to obtain an antibacterial blue fluorescent waterborne polyurethane material. The fluorescent waterborne polyurethane prepared by the present invention has the characteristics of good storage stability, high fluorescence intensity, environmental friendliness, high antibacterial rate, etc., and has the advantages of convenient use, recyclability, wide application fields, etc.

The invention relates to the technical field of catalysts for synthesizing ethylene propylene rubber, and discloses a vanadium-based catalyst composition and a preparation method and application thereof.The vanadium-based catalyst composition comprises a vanadium catalyst, an organic aluminum compound and an activation accelerant, and the preparation method of the vanadium catalyst comprises the steps that a salicylaldehyde compound is dissolved with methyl alcohol or ethyl alcohol; and adding an organic amine compound while stirring, adding a vanadium compound after reaction, and continuously reacting to obtain the vanadium catalyst. When the prepared vanadium catalyst composition is applied to ethylene and propylene copolymerization reaction, the reactivity rate of ethylene and propylene monomers can be adjusted according to the structure of the vanadium catalyst, the C3 content of the prepared ethylene propylene rubber is 26.2-36.4 wt%, the double bond content of ethylene propylene diene monomer is adjustable in the range of 3.7-15.2 wt%, and post-processing application is facilitated.

The invention discloses a small molecular probe based on an imidazo [1, 5-a] pyridine skeleton, a preparation method and application, and belongs to the field of activatable small molecular fluorescent probes. The preparation method of the small molecular probe based on the imidazo [1, 5-a] pyridine skeleton comprises the following steps: dissolving 2-benzoylpyridine and ammonium acetate in acetic acid, adding salicylaldehyde, heating and stirring to generate a compound 3; and dissolving the compound 3 in dichloromethane, adding pyridine, stirring, adding 4-bromobutyryl chloride, and continuously stirring to obtain a compound 1, namely the small molecule probe. The small molecule probe can be used for detecting hydrazine in a biological system or drinking water.