959 results about "Benzaldehyde" patented technology

The invention discloses a synthesis method of vitamin C ethyl ether, and belongs to the technical field of vitamin derivative synthesis. The synthesis method comprises the following steps: adding vitamin C, benzaldehyde and a catalyst into a first organic solvent, carrying out an aldolization reaction, adding an organic alkali after the aldolization reaction is finished, carrying out a neutralization reaction, adding an alkylation reagent, carrying out an alkylation reaction, and removing the first organic solvent after the alkylation reaction is finished, so as to obtain the vitamin C benzaldehyde. The preparation method comprises the following steps: adding a first organic solvent into a first organic solvent, pulping, filtering, collecting filter residues, washing and drying to obtain 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, carrying out hydrogenation deprotection on the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, filtering after hydrogenation deprotection, collecting filtrate, crystallizing, collecting precipitate, washing and drying to obtain the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid. The vitamin C ethyl ether is obtained. The synthesis method provided by the invention is simple to operate and high in production efficiency, and the obtained vitamin C ethyl ether is high in yield and purity.

The invention discloses an immunoregulation hydrogel as well as a preparation method and application thereof, and relates to the technical field of medical materials, amino-derived cationic polysaccharide, carboxyl-derived anionic polysaccharide and dopa-modified protein biopolymer materials are used as biological matrix materials, spermidine is used as a bioactive functional component, and the immunoregulation hydrogel is prepared by a one-step method. The preparation method comprises the following steps: by taking a benzaldehyde-terminated high polymer material as a cross-linking agent, forming a first layer of dynamic reversible cross-linked network structure through Schiff base reaction; then calcium ions are introduced, and the calcium ions and carboxylate radicals are complexed and cross-linked to form a second layer of static irreversible cross-linked network structure which can be used for an ESD (Electro-Static Discharge) operation. By adopting a step-by-step cross-linking mode, the first-step cross-linked single-network hydrogel has injectability, self-repairability, tissue adhesiveness and an immune regulation function, and the second-step cross-linking further ensures stable and lasting performance, so that the problems that a submucosal injection material is easy to disperse, short in lasting time and poor in stability are solved. The immunoregulation function effect of the wound repair material is poor.

The invention discloses a PVC / CPE modified material and a preparation method thereof, and belongs to the technical field of high polymer materials. The PVC / CPE modified material comprises the following raw materials in parts by weight: 80-100 parts of PVC, 20-40 parts of CPE, 3-30 parts of a plasticizer, 2-4 parts of a modified flame-retardant anti-aging agent, 2-3 parts of a stabilizer and 3-5 parts of a lubricant. The preparation method comprises the following steps: preparing an intermediate 1 from organic silicon resin and 4-((4-(hydroxymethyl) phenyl) (phenyl) amino) benzaldehyde, preparing an intermediate 2 from the intermediate 1 and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, preparing an intermediate 3 from cyanuric chloride and N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine, preparing an intermediate 4 from the intermediate 3, and preparing an intermediate 4 from the intermediate 4. And finally preparing the modified flame-retardant anti-aging agent from the intermediate 2 and the intermediate 3. The PVC / CPE modified material prepared by the invention has excellent anti-aging performance and flame retardant performance.

The invention provides an anti-aging flame-retardant epoxy resin coating and a preparation process thereof, and belongs to the technical field of coating preparation. The preparation process comprises the following steps: preparing the flame-retardant additive; preparing a coated modified black phosphorus nanosheet; preparing modified hollow glass beads; preparing the epoxy resin coating. The preparation method comprises the following steps: dissolving 3, 4-dihydroxy benzaldehyde and 2-amino-4-methylphenol in absolute ethyl alcohol, carrying out a heating reflux reaction, carrying out dehydration condensation on an aldehyde group in the 3, 4-dihydroxy benzaldehyde and an amino group in the 2-amino-4-methylphenol to generate an imine bond-containing intermediate, respectively dissolving the intermediate and phosphonitrilic chloride trimer, and carrying out a reaction to obtain the phosphonitrilic chloride trimer. The preparation method comprises the following steps: firstly, adding phosphonitrilic chloride into an intermediate, then mixing for reaction, enabling phenolic hydroxyl groups in the intermediate and phosphonitrilic chloride trimer to be subjected to nucleophilic substitution reaction to generate the flame-retardant additive containing phosphorus and a Schiff base structure, and the flame-retardant additive has relatively good compatibility with an epoxy resin matrix, is not easy to separate out and can effectively improve the flame-retardant property of the epoxy resin coating.

The invention discloses an antibacterial packaging material and a preparation method thereof, and relates to the field of high polymer materials. When the antibacterial packaging material is prepared, polyethylene sequentially reacts with 3-bromo-1-propylene and amino trimethylene phosphonic acid, and modified polyethylene is prepared; the preparation method comprises the following steps: etching a halloysite nanotube with a hydrochloric acid solution, loading tea polyphenol into the halloysite nanotube, reacting 4-(3-thienyl) benzaldehyde and pyrrole on the surface of the halloysite nanotube, and finally polymerizing with 3-aminothiophene and thiophene to prepare the functionalized halloysite nanotube. And mixing the functionalized halloysite nanotube and the modified polyethylene, heating, and preparing a film, thereby obtaining the antibacterial packaging material. The antibacterial packaging material prepared by the invention has the capabilities of flame retardance, static electricity resistance, degradability and oxidation resistance.

The invention relates to the technical field of adhesives, and discloses a weather-resistant transparent adhesive, a preparation method and application of the weather-resistant transparent adhesive to adhesion of a weather-resistant and wear-resistant transparent film and a color-coated sheet. The preparation method of the weather-resistant transparent adhesive comprises the following steps: reacting 4-(2, 3-ethylene oxide) benzaldehyde with tetrakis (3-mercaptopropionic acid) pentaerythritol ester to obtain an intermediate product A; reacting the intermediate product A with 4, 5-diaminobenzene-1, 2-diphenol to obtain an intermediate product B; preparing nano zinc oxide, performing surface modification on the nano zinc oxide, and grafting the intermediate product B to obtain an organic-inorganic hybrid curing agent; modifying epoxy resin by using the composite modifier to obtain modified epoxy resin; the modified epoxy resin, the organic-inorganic hybrid curing agent and the accelerant are mixed and stirred, and the weather-resistant transparent adhesive is obtained; the weather-resistant transparent adhesive disclosed by the invention is high in transparency and has excellent mechanical strength, toughness, adhesiveness and weather resistance.

The invention discloses unsaturated polyester resin for an unmanned aerial vehicle fuselage and a preparation method of the unsaturated polyester resin, and relates to the field of high polymer materials. When the unsaturated polyester resin for the unmanned aerial vehicle fuselage is prepared, a flame-retardant monomer reacts with 2-hydroxy-5-(hydroxymethyl) benzaldehyde to prepare a modified flame-retardant monomer; reacting cellulose with acrylic acid to obtain pre-modified cellulose; the pre-modified cellulose, 1-allyl-1, 1, 3, 3-tetramethyldisiloxane and chloroplatinic acid are subjected to a reaction, and modified cellulose is prepared; maleic anhydride, 5-(1H-imidazole-1-yl)-1, 3-phthalic acid, propylene glycol and the modified flame-retardant monomer are subjected to a reaction, and pre-polyester is prepared; and stirring the pre-polyester, zinc chloride, modified cellulose, benzophenone peroxide and styrene to obtain the anti-aging coating. The prepared unsaturated polyester resin for the unmanned aerial vehicle fuselage has good anti-aging, self-repairing, flame-retardant and self-cleaning performance.

The invention discloses a fire extinguishing additive for a lithium battery and a preparation method of the fire extinguishing additive, and relates to the technical field of fire extinguishing. When the fire extinguishing additive is prepared, allylamine hydrochloride reacts with benzaldehyde to prepare double-bond aromatic Schiff base; ammonium dihydrogen phosphate is modified with lanthanum oxide and compounded with fumed silica, and mixed powder is prepared; the preparation method comprises the following steps: dissolving aluminum ammonium sulfate dodecahydrate, magnesium sulfate heptahydrate and a nucleating agent in water, and then adding a thickening agent, a polymer monomer, a cross-linking agent and an initiator for reaction to prepare a hydrated salt phase change hydrogel solution; and the mixed powder and the hydrated salt phase change hydrogel solution are mixed and stirred at a high speed, and the fire extinguishing additive is prepared. The prepared fire extinguishing additive has the advantages of being small in fire extinguishing agent dosage, high in fire extinguishing speed, high in cooling rate and free of after-combustion.

The invention provides a triphenylamine derivative as well as a preparation method and application thereof in killing gram-positive bacteria. The preparation method comprises the following steps: firstly, synthesizing an intermediate molecule 4-di-p-methoxyanilino benzaldehyde (s); the s respectively reacts with 3-pyridylacetonitrile and 4-pyridylacetonitrile to generate intermediate molecules a and b; the intermediate molecules a and b respectively react with methyl iodide to generate triphenylamine derivatives 1 and 2, and the intermediate molecules a and b respectively react with 9-bromomethyl anthracene to generate triphenylamine derivatives 3 and 4. The prepared triphenylamine derivative has a donor-acceptor structure and is a D-pi-A structure, the modified triphenylamine is used as a donor, a carbon-carbon double bond is used as a covalent bridge, and cyano and N positive ions have electron withdrawing property. As all the components contain positive ions, the components can be anchored on a bacterial membrane to kill bacteria; and the compound has a short alkyl chain and can be combined with gram-positive bacteria, so that the bacteria are killed.

The invention relates to the technical field of organic synthesis, in particular to a synthesis method and application of functional caprolactam and functional nylon-6. The synthesis method comprises the following steps: in the presence of a catalyst and a solvent, enabling amino caprolactam and / or a derivative thereof to contact and react with benzaldehyde, so as to obtain functional caprolactam which is bis (benzyl) amino caprolactam, wherein the reaction conditions are as follows: the temperature is 150-350 DEG C; the hydrogen pressure is 0.1 to 10 MPa; the time is 5-15 hours. The synthesis method not only has the advantages of high reaction efficiency, high catalytic efficiency, adjustable target product selectivity and the like, but also simplifies process conditions, and realizes green large-scale production.

The invention belongs to the technical field of catalytic degradation, and particularly relates to a bismuth cluster / CTF composite photocatalyst and a preparation method and application thereof. The bismuth cluster and CTF are compounded through a hydrothermal method, photocatalytic cracking of lignin can be achieved, efficient separation of photo-induced electrons and holes of the photocatalyst can be achieved, fine adjustment of the electron structure of the photocatalyst is achieved by adjusting the addition amount of the bismuth cluster precursor, generation of h < + > and. O < 2-> in the photocatalytic process is improved, and the photocatalytic performance of the photocatalyst is improved. Therefore, the yield of the aromatic monomer prepared by cracking the lignin is improved, the cracking conversion rate can reach 78.5%, the yield of benzoic acid can reach 65.2%, the yield of benzaldehyde can reach 81.4%, the yield of phenyl formate can reach 52.6%, and the method is green, clean and safe.

The invention discloses a preparation method and application of a photo-thermal dual-response membrane material, and relates to the field of membrane materials. When the photo-thermal double-response membrane material is prepared, a photo-thermal material firstly reacts with 4-(triethoxysilyl) aniline and then reacts with 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and p-phenylenediamine, and a modified photo-thermal material is prepared; the preparation method comprises the following steps: sequentially reacting benzaldehyde with 2-hydroxyacetophenone and 3-N, N-dimethylamino methacryloyl chloride to prepare a photo-initiation monomer; the preparation method comprises the following steps: mixing N-isopropylacrylamide, a photo-initiation monomer, N, N '-methylene bisacrylamide and a modified photo-thermal material, combining with a hydrophobic substrate membrane, preparing a membrane, and finishing the surface by using 2-bromo-1-[3, 5-di (tert-butyl)-4-hydroxyphenyl] ethanone, thereby obtaining the photo-thermal dual-response membrane material. The photo-thermal dual-response membrane material prepared by the invention has the characteristics of pollution resistance, easiness in cleaning, durability, antibacterial property, metal ion recovery and low energy consumption.

The invention relates to the technical field of benzyl alcohol preparation, and provides a benzyl alcohol rectification method and device capable of reducing generation of high-boiling residues, the rectification method comprises the following steps: S1, benzyl chloride and an alkali solution are subjected to a hydrolysis reaction, and then reaction liquid is subjected to oil-water separation to obtain an oil-phase material and a water-phase material; s2, adding the oil-phase material obtained in the step S1 into a stirring kettle, adding recycled water generated after desalting the water-phase material, stirring, and adding alkali liquor into the stirring kettle at the same time; and S3, carrying out oil-water separation on the oil-water mixture in the step S2, and transferring an oil phase into a rectifying tower for rectification. After oil-water separation of the reaction liquid, stirring an oil phase with recycled water in a stirring kettle to elute brine water droplets entrained by the oil phase, and adding a trace amount of strong alkali into the stirring kettle at the same time, so that the rectified raw oil carries water and the trace amount of strong alkali to be alkaline; hCl generated by hydrolysis of benzyl chloride is prevented from forming an acidic environment in a gas phase and a liquid phase of the whole tower, so that benzaldehyde and benzyl alcohol are prevented from generating a condensation reaction under an acidic catalysis condition to generate a high-boiling residue.

The invention discloses a salt-resistant and acid-resistant yeast fungus capable of efficiently degrading benzene series and application of the yeast fungus, the yeast fungus is Barnettozyma hawaiiensis, and the preservation number is CCTCC (China Center for Type Culture Collection) M 20241391. The yeast strain can keep activity in a high-salinity and acidic environment, obviously reduces the content of organic matters in high-salinity wastewater, and shows efficient degradation capacity on benzene series, especially benzaldehyde, in the high-salinity acidic wastewater. The method is especially suitable for treating high-salt or acidic organic wastewater and refractory industrial organic wastewater containing benzene series such as shale gas flowback fluid. An effective bacterium source is provided for biochemical treatment of high-salt acidic refractory industrial organic wastewater containing benzene series and the like.

The present invention relates to covalent network-based polymers derived from imine and disulphide based crosslinkers with the epoxy. The recyclability of the high-cost fibres is achieved by the synthesis of epoxy vitrimers based on dynamic imine and imine-disulphide bonds. Schiff base chemistry and condensation reaction are used to prepare the crosslinkers with imine linkages as well as imine-disulphide linkages. Various aromatic carbonyl compounds like divanillin, terepthaldehyde, vanillin, 4-hydroxy benzaldehyde, isatin etc. are used for the reaction with various aliphatic and aromatic amines like IPDA, 2-AFD, 4-AFD etc. The prepared epoxy vitrimers showed comparable thermal, mechanical and thermomechanical properties with the conventional DGEBA epoxy-amine system. The carbon / glass fiber-reinforced composite with the vitrimers showed superior mechanical properties beneficial for many engineering applications. The recycling of the vitrimers and composites can be achieved by simple immersion in a suitable solvent system with stirring or agitation at ambient temperature (30-60ºC) conditions. The fibers were easily recovered without losing their morphology, strength and structural integrity. With this invention, wastage of reinforcement carbon fibers and glass fibers can be minimized and the recovered fibers can be used for other applications with a circular economy approach.

The invention discloses a mechanical force-induced fluorescence discoloration sensor material as well as a preparation method and application thereof, and relates to the technical field of organic synthesis and fine chemical engineering. The preparation method comprises the following steps: step 1, carrying out heating reaction on 4-(1, 2, 2-triphenyl vinyl) benzaldehyde, 3-(2, 2-dicyano-1-(3, 4-diaminophenyl) vinyl) benzene-1-yl and a catalyst to prepare a compound 1-1; and 2, carrying out heating reaction on the obtained compound 1-1 and methyl iodide under the action of alkali and a solvent, and analyzing and purifying to obtain a compound 1-2. The compound disclosed by the invention is low in preparation cost, simple and convenient to operate and simple in method, the compound shows the material characteristic of mechanical force-induced fluorescence discoloration and can be applied to the fields of sensors, dyes, anti-counterfeiting and the like, and meanwhile, the synthesis method can be used for synthesis in the fields of fine organic chemical engineering such as luminescent materials, printing and dyeing technologies and the like.

The invention relates to the field of chelating agent preparation, in particular to an efficient metal chelating agent and a preparation method and application thereof. The preparation method comprises the following preparation steps: (1) dissolving dibutanol amine in absolute ethyl alcohol, adding carbon disulfide, reacting for 5-8 hours at 0-5 DEG C in a nitrogen atmosphere, adjusting the pH to be neutral by using a sodium hydroxide aqueous solution, and performing rotary evaporation to obtain sodium bis (4-hydroxybutyl) dithiocarbamate; and (2) adding 4-[bis (beta-chloroethyl) amino] benzaldehyde, the bis (4-hydroxybutyl) sodium dithiocarbamate obtained in the step (1) and a catalyst into absolute ethyl alcohol, heating and refluxing, reducing pressure to remove absolute ethyl alcohol, adding the obtained solid into pure water, stirring, extracting, combining organic phases, drying moisture in the organic phases, concentrating, standing for 10-20 hours, and separating to obtain the metal chelating agent. The prepared metal chelating agent has good dispersity and solubility in various solvents, and a stable metal chelate is formed through coordination chelation of active functional groups and heavy metal ions.

The invention discloses a high-temperature proton exchange membrane based on basic group grafted polyvinyl alcohol and a preparation method of the high-temperature proton exchange membrane. According to the method, polyvinyl alcohol serves as a base material, three compounds with basic groups are grafted to a polyvinyl alcohol side chain through aldol condensation reaction, crosslinking is conducted, and the polyvinyl alcohol membrane material based on basic group grafting is obtained and specifically comprises the steps that a, a polyvinyl alcohol solution is prepared; (b) adding imidazole formaldehyde or pyridylaldehyde or halogenated benzaldehyde into a polyvinyl alcohol solution, and carrying out reflux reaction by taking an HCl solution as a catalyst to prepare a graft polymer; (c) preparing the graft polymer into a graft film; (d) soaking the grafted membrane in a glutaraldehyde solution for crosslinking, and preparing a membrane material by adopting a solution casting method; and (e) carrying out phosphoric acid doping on the membrane material. The preparation cost of the membrane material is low, the reaction condition is mild, and the membrane material has a more compact or more compact structure, is transparent, uniform and compact, and has good conductivity and mechanical properties.

The invention relates to L-threonine aldolase, in particular to an L-threonine aldolase mutant R318L / H128N / N90Q and application of the L-threonine aldolase mutant R318L / H128N / N90Q. The amino acid sequence of the L-threonine aldolase mutant is shown as SEQ ID NO: 3, and the L-threonine aldolase mutant is obtained by changing the 318th amino acid of L-threonine aldolase of which the amino acid sequence is SEQ ID NO: 1 into Leu from Arg, changing the 128th amino acid into Asn from His and changing the 90th amino acid into Gln from Asn. The mutant has high catalytic activity in a reaction of catalyzing benzaldehyde and derivatives thereof and glycine to synthesize beta-hydroxyl-alpha-amino acid, when a whole cell expressing R318L / H128N / N90Q is used for catalysis, the diastereoselectivity (de) of benzaldehyde and glycine to synthesize benzene serine is 65.8%, and the yield is 67.7%; the diastereoselectivity (de) of p-fluorobenzene serine synthesized from p-fluorobenzaldehyde and glycine is 77.5%, and the yield of p-fluorobenzene serine is 80.3%. The mutant has application potential in biosynthesis of beta-hydroxyl-alpha-amino acid.

The invention relates to a preparation method of oxygen vacancy-containing bismuth vanadate BiVO4-OVs or metal bismuth-loaded bismuth vanadate xBi0 / BiVO4. The preparation method comprises the following steps: weighing bismuth nitrate pentahydrate and ammonium metavanadate according to a molar ratio of bismuth nitrate pentahydrate to ammonium metavanadate of 1: 1 + x; the preparation method comprises the following steps: respectively dissolving bismuth nitrate pentahydrate and ammonium metavanadate in a solvent, fully mixing the bismuth nitrate pentahydrate and the ammonium metavanadate, adjusting the pH value of the solution, placing a reaction system in an environment of 140-180 DEG C for reaction, washing and drying a product, and roasting under the protection of argon to obtain the product. In addition, the invention also discloses an application of the bismuth vanadate BiVO4-OVs containing oxygen vacancies or the bismuth vanadate xBi0 / BiVO4 loaded with metal bismuth as a catalyst in preparation of benzaldehyde by photocatalytic oxygen oxidation of cinnamyl aldehyde. According to the method, the utilization rate of cinnamyl aldehyde can be increased, efficient oxidation can be achieved in the initial stage of reaction, good benzaldehyde selectivity can be achieved, and the adopted catalyst is efficient and non-toxic and has no influence on the naturalness of benzaldehyde.

The invention discloses a benzaldehyde lyase derived from Pseudomonas fluorescens, a mutant of the benzaldehyde lyase, and an application of the benzaldehyde lyase and the mutant of the benzaldehyde lyase as a catalyst in catalysis of chiral amino alcohol. The invention further discloses a preparation method of the benzaldehyde lyase and the mutant of the benzaldehyde lyase. The benzaldehyde lyase disclosed by the invention has the advantages of high reactivity, high stereoselectivity, wide substrate range and the like, the yield is as high as 99%, the ee value is as high as 99%, low-cost production is favorably realized, and the benzaldehyde lyase has an industrial application prospect.

An emulsifiable concentrate (EC) comprising one or more pesticides, one or more emulsifiers, one or more co-solvents and certain benzaldehyde-derived solvents, an emulsion-in-water (EW) formulation formed from said emulsifiable concentrate (EC), and the use of the certain benzaldehyde-derived solvents as a solvent in an agrochemical emulsifiable concentrate.

The invention discloses an anti-radiation fabric and a preparation method thereof, and relates to the technical field of fabric preparation. When the anti-radiation fabric is prepared, bismuth powder is pre-modified with (3-chloropropyl) trimethoxysilane and then reacts with an anti-aging agent to prepare modified bismuth powder; the preparation method comprises the following steps: enabling 4-aminophenylethanol and 4-(2-ethoxyl) benzaldehyde to react to prepare a flame-retardant monomer, and then enabling the flame-retardant monomer to react with isophorone diisocyanate and 1, 4-butylene glycol to prepare polyurethane; the preparation method comprises the following steps: reacting dimethylallylamine with 1, 3-bis (chloromethyl)-1, 1, 3, 3-tetramethyldisiloxane to obtain an antibacterial cross-linking agent; the modified bismuth powder, N, N-dimethylformamide, polyurethane, an antibacterial cross-linking agent and benzoyl peroxide are mixed to prepare a polyurethane coating, the outer side surface of polyester base cloth is coated with the polyurethane coating, drying is conducted, and the anti-radiation coating fabric is prepared. The anti-radiation fabric prepared by the invention has good anti-radiation, anti-light aging, flame-retardant and antibacterial properties.

The invention provides a benzocarbazole covalent organic framework as well as a preparation method and application thereof. The preparation method of the benzocarbazole covalent organic framework comprises the following steps: dissolving reaction raw materials of 4, 4 ', 4' ', 4 '''-([9, 9 '-dicarbazole]-3, 3', 6, 6 '-tetrayl) tetrabenzaldehyde and tetra-(4-aminobenzene) ethylene in a mixed solvent at 10-25 DEG C, and uniformly mixing to obtain a mixed solution; a catalyst acetic acid is added into the mixed solution, then freezing-unfreezing circulation degassing and sealing are carried out, a reaction is carried out for 72-120 h at the temperature of 120-150 DEG C, a reaction solution is obtained, the reaction solution is subjected to aftertreatment, and the benzocarbazole covalent organic framework is obtained. The carbazole covalent organic framework provided by the invention is applied to uranium-containing wastewater as a photocatalyst, and has the advantages of multiple catalytic sites, good stability and cyclic utilization.

The invention relates to an improved conductive silver paste composition and a preparation method thereof, and belongs to the technical field of conductive material preparation, and the improved conductive silver paste composition specifically comprises the following raw materials in parts by mass: 60-70 parts of silver-coated copper powder, 12-20 parts of graphene oxide, 0.5-1.5 parts of a conductive micromolecule polymer, 5-8 parts of modified cellulose nanocrystals, 1-3 parts of an oxidant, 8-12 parts of epoxy resin and 5-10 parts of a diluent. Wherein the conductive micromolecule polymer is obtained by reacting aniline, benzaldehyde and pyruvic acid; the modified cellulose nanocrystals are obtained by modifying carboxylated cellulose nanocrystals with dopamine hydrochloride. The prepared conductive silver paste realizes collaborative optimization of conductivity, mechanical properties and process suitability through a composite system of silver coated copper, graphene oxide, conductive polymer and epoxy resin, has high cost performance and high performance, and is suitable for the fields of photovoltaics, flexible electronics, automotive electronics and the like.

The invention relates to the technical field of foot pads, in particular to a laminated composite coated foot pad and a preparation method thereof. The invention comprises the following steps: preparing an antibacterial flame-retardant impregnation liquid with fluorine-containing organosilicon polyurethane and composite zinc phytate, and impregnating a burr cloth composite material in the antibacterial flame-retardant impregnation liquid; synthesizing an organosilicon prepolymer with hydroxyl-terminated polydimethylsiloxane and isophorone diisocyanate as raw materials, and polymerizing a hydroxylated fluorinated borneol copolymer prepared by free radical polymerization of isoborneol methacrylate, dodecafluoroheptyl methacrylate and 1-thioglycerol, using quaternized glycogen as a chain extender, and using triethanolamine as a capping agent to obtain a fluorine-containing organosilicon polyurethane; preparing zinc phytate with phytic acid and zinc acetate, and then synthesizing a Schiff base copolymer with 3,4-dihydroxybenzaldehyde, quaternized glycogen and DOPO as raw materials in a one-pot method, and coating the zinc phytate with intermolecular forces to prepare a composite zinc phytate as a flame retardant and an antibacterial agent and introducing the composite zinc phytate into the flame-retardant and antibacterial impregnation liquid.

The invention discloses a high-flame-retardant bio-based aerogel material and a preparation method thereof, and belongs to the technical field of flame-retardant bio-based aerogel. The high-flame-retardant bio-based aerogel material prepared by the preparation method disclosed by the invention is prepared from the following raw material components in parts by mass: 10 parts of a bio-based flame-retardant filler with a porous structure, 40 to 50 parts of a hydrophobic siloxane monomer, 12.4 to 12.6 parts of an ammonium phytate solution, 6.2 to 6.3 parts of guanosine, 31.1 to 31.4 parts of cellulose nanofibers and 0.01 to 0.02 part of benzaldehyde-polyethylene glycol-silane, the preparation method comprises the following steps: firstly, carrying out hydrolytic polycondensation on a bio-based flame-retardant filler with a porous structure and a hydrophobic siloxane monomer to form a siloxane polymer network with the bio-based flame-retardant filler as a branching center; then adding cellulose nanofibers, guanosine and an ammonium phytate solution, and performing freeze casting-freeze drying-heating post-treatment to obtain the composite material. Wherein the bio-based flame-retardant filler is obtained by compounding a porous cuttlefish ink carbon quantum dot composite material with phytic acid siloxane and trimethoxy (3-(4-nitrophenoxy) propyl) silane.

The invention discloses a preparation method of a low-chlorine composite environment-friendly coal transportation anti-freezing agent, and belongs to the technical field of anti-freezing solutions. The anti-freezing solution is used for solving the technical problems of complex components and poor anti-freezing and metal corrosion resistance of the anti-freezing solution for coal transportation in the prior art. The preparation method of the low-chlorine composite environment-friendly coal transportation anti-freezing agent comprises the following step: uniformly mixing the compound pour point depressant, the modified corrosion inhibitor, the thickening stabilizer and the industrial water to prepare the low-chlorine composite environment-friendly coal transportation anti-freezing agent. The compound pour point depressant comprises an organic pour point depressant and an inorganic pour point depressant; the organic pour point depressant is obtained by reacting unsaturated azole, sodium methallyl sulfonate and fumaric acid; the unsaturated nitrogen is obtained by reaction of an intermediate B and benzaldehyde, and the intermediate B is obtained by reaction of triazole and ethyl chloroacetate; the modified corrosion inhibitor is obtained by carrying out a reaction on potassium thiocyanate, benzoyl chloride and chitosan vanillin Schiff base. The anti-freezing solution prepared by the invention has the advantages of moderate fluidity, good metal corrosion resistance and good anti-freezing performance.

The invention discloses a fluorine coating melt-extruded on the surface of a polyimide film and a preparation method of the fluorine coating, and relates to the technical field of coating materials. The fluorine coating melt-extruded on the surface of the polyimide film is prepared by melt-mixing a component A, a component B and a fluorine-containing polymer, melt-extruding and coating the mixture on the surface of the polyimide film, the component A is a hydroxyl mixture, and the component B is an end-capped prepolymer; the hydroxyl mixture comprises hydroxyl terpyridine and hydroxyl fluorocarbon resin, the hydroxyl terpyridine is prepared by reacting diacetylpyridine with 3, 4-dihydroxyethoxy benzaldehyde, the 3, 4-dihydroxyethoxy benzaldehyde is prepared by reacting 3, 4-dihydroxybenzaldehyde with 2-chloroethanol, and the hydroxyl fluorocarbon resin is prepared by reacting 3, 4-dihydroxybenzaldehyde with 2-chloroethanol. The hydroxyl fluorocarbon resin is prepared by reacting butyl acrylate, hexafluorobutyl acrylate, dodecafluoroheptyl methacrylate, methacrylic acid and 2-hydroxyethyl methacrylate; the fluorine-containing polymer is prepared by carrying out a reaction on p-aminobiphenyl, 2, 3, 5, 6-tetrafluoroterephthalaldehyde and sodium triacetoxyborohydride, and the p-aminobiphenyl is prepared by carrying out a reaction on decafluorobiphenyl and 4-aminophenol; and the water resistance of the polyimide film coated with the fluorine coating is ensured.

The invention discloses an organic phosphorescent material intermediate for an OLED (Organic Light Emitting Diode) as well as a preparation method and application of the organic phosphorescent material intermediate, and relates to the field of organic phosphorescent materials. The intermediate is prepared through a Diels-Alder cycloaddition reaction between trans-cyclooctene and 3, 6-diphenyltetrazine, the reaction is carried out under the conditions that the temperature is 20-30 DEG C and the time is 10-30 minutes, and the mass ratio of the trans-cyclooctene to the 3, 6-diphenyltetrazine is 1: (1.0-2.5). Trans-cyclooctene is prepared by isomerizing cis-cyclooctene under the irradiation of 254nm ultraviolet light in the presence of a photosensitizer; the 2, 3, 6-diphenyl tetrazine is prepared by condensation, cyclization and purification of benzaldehyde and benzoyl hydrazine. The purity of the prepared intermediate reaches up to 99.2%, the yield reaches 82.4%, the intermediate serving as an OLED luminescent material has excellent thermal stability, and the quantum efficiency is still kept at 90.1% after HTHH treatment is conducted for 1000 h. The invention provides a new intermediate choice for developing a high-performance OLED (Organic Light Emitting Diode) material.