1532 results about "Formic Aldehyde" patented technology

A fibrous insulation product comprising a plurality of randomly oriented glass fibers and a cross-linked formaldehyde-free binder composition at least partially coating the fibers is disclosed. The cross-linked formaldehyde-free binder composition is formed from an aqueous binder composition comprising 5.0% by weight to 37.0% by weight of at least one monomeric polyol having at least four hydroxyl groups and at least 50.0% by weight of a cross-linking agent comprising a polymeric polycarboxylic acid having at least two carboxylic acid groups, based on the total solids content of the aqueous binder composition. The glass fibers have an average fiber diameter in the range of 8 HT to 12 HT. The fibrous insulation product, after curing, has a density, when uncompressed, in the range of 0.30 pcf to 2.7 pcf.

The invention relates to a crown ether covalent organic framework material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a crown ether monomer and an amino monomer in an o-dichlorobenzene solvent, adding a catalyst acetic acid aqueous solution, and uniformly dispersing to form a reaction solution; the method comprises the following steps: freezing a reaction solution through a liquid nitrogen bath, vacuumizing, filling nitrogen, carrying out a heating reaction, and carrying out post-treatment operations such as washing and drying on a reaction product, so as to obtain the crown ether covalent organic framework material BADT-DB18C6-COF. The crown ether covalent organic framework material is formed by condensation of a crown ether aldehyde monomer and an amino monomer, the crown ether monomer is 4, 4 ', 4' ', 4 '''-(6, 7, 9, 10, 17, 18, 20, 21-octahydrodibenzo [B, K] [1, 4, 7, 10, 13, 16] hexaoxacyclo octadecene-2, 3, 13, 14-tetrayl) tetrabenzaldehyde, and the crown ether monomer is 4, 4 ', 4' ', 4'''-(6, 7, 9, 10, 17, 18, 20, 21-octahydrodibenzo [B, K] [1, 4, 7, 10, 13, 16] hexaoxacyclo octadecene-2, 3, 13, 14-tetrayl) tetrabenzaldehyde. The amino monomer is 4 ', 5'-bis (4-aminophenyl)-[1, 1 ': 2', 1 ''-terphenyl]-4, 4''-diamine. The crown ether covalent organic framework material BADT-DB18C6-COF prepared by the invention is mainly used as an adsorbent, is used for adsorbing and recovering uranium, thorium and americium ions from a solution, shows good adsorption capacity on radionuclides U-238, Th-232 and Am-243, and is particularly suitable for the field of spent fuel post-treatment in the nuclear industry.

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 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 relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention discloses a preparation method of second-generation denitrified flavin TND1128, which comprises the following steps: S1, by taking 1-methylbarbituric acid and o-aminobenzaldehyde as raw materials and a mixture of water and alcohol as a solvent, heating and reacting to generate an intermediate I; s2, taking the intermediate I as a raw material, and performing ethylation under the combined action of inorganic alkali and an ethylation reagent to generate a TND1128 crude product; s3, the TND1128 crude product is purified, and a TND1128 pure product is obtained; according to the invention, 1-methylbarbituric acid and 2-nitrobenzaldehyde are taken as raw materials for cyclization synthesis of an intermediate I, then ethylation and pulping purification are carried out under the combined action of inorganic base and an ethylation reagent, and high-purity TND1128 is synthesized in a high-yield, high-specificity and high-selectivity manner; the method has the advantages of simple process route, good reaction selectivity, high yield, cheap and easily available raw materials, low equipment requirement, easy realization of industrial production and the like.

The invention provides formaldehyde lyase as well as a mutant and application thereof. The amino acid sequence of the formaldehyde lyase mutant is shown as SEQ ID NO.1, SEQ ID NO.4 or SEQ ID NO.6 and contains at least one of the following sites: S26, W86, N87 or Y87, L109 or M109, L110, H281, Q282 or E282 and A460, and the amino acid sequence is subjected to amino acid mutation and has a formaldehyde lyase activity function. The amino acid sequences of the formaldehyde lyase and the mutants of the formaldehyde lyase have at least 99% of sequence identity with SEQ ID NO.1-7. The formaldehyde lyase and the mutant thereof can catalyze formaldehyde to synthesize 1, 3-dihydroxyacetone, and a new way for converting formaldehyde into 1, 3-dihydroxyacetone is provided.

The invention discloses a preparation method of 3, 4-dihydroxy benzaldehyde / gelatin carbon nanomaterial-based adhesive hydrogel, and belongs to the technical field of hydrogel. According to the invention, 3, 4-dihydroxy benzaldehyde and gelatin are adopted as carbon sources, the synthesized nano-filler has amphiphilic surface characteristics, uniform dispersion of the nano-filler in a hydrogel network can be promoted, meanwhile, a mechanically firm and deformable nano-composite structure is established by utilizing the interaction of multivalent interfaces, and 3, 4-dihydroxy benzaldehyde and gelatin are added into the hydrogel network. The surface chemical property of the 1, 4-dihydroxybenzaldehyde / gelatin nano-filler not only can relieve phase separation, but also can promote synergistic energy dissipation through hydrogen bond reconstruction under the action of stress. According to the design, the inherent flexibility of the hydrogel is reserved, meanwhile, the electromechanical response capacity of the hydrogel is greatly improved, and the obtained hydrogel material has the dual functions of structural supporting and active sensing media and can be seamlessly integrated with biological tissue without sacrificing the fidelity of interface signals.

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 relates to the technical field of materials and advanced oxidation, and discloses a covalent organic framework catalyst with a benzothiadiazole structure, a preparation method of the covalent organic framework catalyst and application of the covalent organic framework catalyst in peroxymonosulfate (PMS) activation and organic pollutant degradation. The preparation method of the covalent organic framework catalyst comprises the following steps: adding precursors 1, 3, 6, 8-tetra-(p-aminophenyl)-pyrene and 2, 7-dibenzaldehyde-benzothiadiazole into a mixed solvent composed of o-dichlorobenzene and n-butyl alcohol, carrying out a reaction by using acetic acid as a catalyst through a solvothermal method, and after the reaction, carrying out multiple times of centrifugal washing and drying to obtain the covalent organic framework catalyst. The catalyst shows excellent performance in the aspect of activating PMS to degrade organic pollutants, the degradation rate constant of bisphenol A reaches 1.68 min <-1 >, and 100% removal can be achieved within 5 minutes. Meanwhile, the catalyst has the advantages of no secondary pollution, strong anti-interference performance, reusability and the like. Compared with a traditional method, the catalyst has high PMS activation efficiency, the catalysis process is energy-saving and environment-friendly, the operation is simple and convenient, the preparation process is simple and feasible, and a new solution is provided for efficient degradation of organic pollutants in water.

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 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 present invention discloses an infrared-shielding polyurethane glass film and a preparation method thereof, relating to the field of polymer materials technology. When preparing the infrared-shielding polyurethane glass film, the present invention comprises reacting an organic nickel complex and 3-imidazole-1-propionic acid to produce a functionalized crosslinker; sequentially reacting 4-aminophenylacetonitrile with 3-hydroxypropyl acrylate and quinoline-4-carboxaldehyde to produce a UV-absorbing monomer; reacting polypropylene glycol, a UV-absorbing monomer, 1,4-butanediol, and 4-chloromethyl-1,3-phenylenediisocyanate to polymerize to produce polyurethane; reacting tungsten-doped titanium dioxide and chloropropyltriethoxysilane to produce modified titanium dioxide; and uniformly mixing the polyurethane, modified titanium dioxide, the functionalized crosslinker, and acetone, followed by coating and curing to produce the infrared-shielding polyurethane glass film. The infrared-shielding polyurethane glass film prepared by the present invention has excellent infrared shielding, anti-aging, antibacterial, and mechanical properties.

The invention discloses a phenanthridine-6-formaldehyde derivative and a preparation method and application thereof.The preparation method comprises the steps that 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile serves as a photocatalyst, 1-azabicyclo [2.2. 2] octane serves as a hydrogen atom transfer catalyst, a biphenyl isocyanide compound, the photocatalyst, the hydrogen atom transfer catalyst and an alkali additive are jointly dissolved in 1, 3-dioxolane, the mixture is stirred to be uniform, and the phenanthridine-6-formaldehyde derivative is obtained. And carrying out free radical tandem cyclization and acid-catalyzed hydrolysis reaction to obtain the phenanthridine-6-formaldehyde derivative. The invention also provides a specific reaction equation. According to the developed synthesis method of the phenanthridine-6-formaldehyde derivative, the compound can be efficiently and conveniently prepared, the technical bottlenecks of harsh reaction conditions and tedious steps in a traditional process are successfully overcome, raw materials which are low in price and easy to obtain are adopted, operation is carried out under mild conditions, the synthesis method has the outstanding advantages of being high in yield, safe and simple to operate, environmentally friendly and the like, and the method is suitable for industrial production. Good industrial application potential is shown.

The invention relates to the technical field of high polymer materials, in particular to an impact-resistant flame-retardant polyamide cable tie and a preparation method thereof. The preparation method comprises the following steps: fully and uniformly mixing polyamide 6 and a flame retardant, and carrying out melt extrusion, pelletizing and melt spinning to obtain the flame-retardant fiber. The preparation method comprises the following steps: adding a magnesium-aluminum hydrotalcite material, gamma-aminopropyltriethoxysilane, 4-hydroxybenzaldehyde, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and cyanuric chloride to prepare a hydrotalcite flame-retardant material, and further adding the magnesium-aluminum hydrotalcite material, gamma-aminopropyltriethoxysilane, 4-hydroxybenzaldehyde, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and cyanuric chloride to prepare the hydrotalcite flame-retardant material. The preparation method comprises the following steps: pre-mixing polyamide resin, flame-retardant fibers and a hydrotalcite flame-retardant material, adding a flexibilizer, a plasticizer, an antioxidant and a heat stabilizer, and uniformly mixing to obtain a mixture; and sequentially carrying out extrusion granulation and injection molding on the mixed material to obtain a finished product. The finished product prepared by the invention has good flame retardant property and impact resistance, thereby having wide application prospects in the technical field of high polymer materials.

The invention relates to the field of automobile foot mats, and discloses a TPE composite material for an automobile foot mat and a preparation method thereof.The composite material comprises a bottom-layer plastic uptake material and a preset three-dimensional material fused on the surface of the bottom-layer plastic uptake material, and the preset three-dimensional material comprises SEBS, low-density polyethylene, EVA, modified nano titanium dioxide, color master batches and auxiliaries; the modified nano titanium dioxide is prepared by grafting a modified additive and nano titanium dioxide, wherein the modified additive is prepared by reacting a functional additive, 2-(2, 4-dihydroxyphenyl)-2H-benzotriazole and a modified antibacterial monomer; the functional additive is prepared by reacting a component I obtained by reducing 2-cyano-6-hydroxybenzothiazole with 5-methylisoxazole-3-formyl chloride; the component I is prepared by reducing 2-cyano-6-hydroxybenzothiazole with 5-methylisoxazole-3-formyl chloride; the modified antibacterial monomer is prepared by reacting benzothiazole-2-formaldehyde with 2, 6-dichloro-4-aminophenol and then reacting with 3-chloropropyltriethoxysilane, and the TPE composite material prepared by the invention can realize a multi-color or multi-pattern effect, and in addition, the material can be endowed with excellent ultraviolet aging resistance, heat resistance and antibacterial property.

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.

The invention discloses a Schiff base epoxy oligomer chain extender as well as a preparation method and application thereof. The preparation method of the Schiff base epoxy oligomer chain extender comprises the following steps: adding p-hydroxybenzaldehyde and p-hydroxyaniline into ethanol, reacting at 30-70 DEG C for 2-5 hours, and performing suction filtration to obtain a 4-((4-hydroxybenzylidene) amino) phenol intermediate; and mixing the 4-((4-hydroxybenzylidene) amino) phenol intermediate, epoxy chloropropane and a catalyst, reacting at 80-100 DEG C for 3-7 hours, cooling to 50-70 DEG C, dropwise adding a strong alkali solution, reacting for 4-8 hours after dropwise adding, washing with deionized water, retaining an organic layer, and carrying out rotary evaporation on the organic layer to obtain the product. The rigidity, toughness and heat resistance of the modified nylon 6 prepared by applying the Schiff base epoxy oligomer chain extender are improved, and the modified nylon 6 still has processability similar to that of nylon 6.

The invention discloses a covalent organic framework with oxidation-reduction activity and a bionic nano-channel structure as well as a preparation method and application of the covalent organic framework, and belongs to the technical field of environmental protection. According to the preparation method, 2, 4-dihydroxybenzene-1, 3, 5-tricarboxaldehyde and 2, 5-bis (allyloxy) terephthaloyl hydrazine are taken as raw materials, a two-dimensional covalent organic framework with oxidation-reduction activity is synthesized, and then a sulfonic acid group with negative charges is covalently grafted, so that a functional material with a bionic nano-channel structure is formed. The material has regular porous channels and rich functional sites, the porous channels provide efficient mass transfer paths and adsorption spaces for uranyl ions, and the functional sites realize specific recognition of the uranyl ions through oxidation-reduction reaction and electrostatic interaction, so that the material shows synergistic advantages of strong selectivity, high adsorption capacity and rapid adsorption kinetics on uranium. The method is simple and low in cost, and the prepared material is clear in structure, good in hydrophilicity, capable of efficiently adsorbing uranyl ions and good in application prospect.

The invention provides a method for continuously synthesizing 2-thiophenecarboxaldehyde by using a continuous flow reactor, and relates to the technical field of organic synthesis, and the method comprises the following steps: mixing thiophene and N, N-dimethylformamide (DMF) to form a material A; continuously inputting the material A and phosphorus oxychloride (POCl3) into a micro-channel continuous flow reactor through a high-pressure feeding pump, and controlling the reaction temperature to be 60-150 DEG C and the retention time to be 0.5-5 minutes; synchronously inputting the reaction liquid output by the micro-channel reactor and a sodium hydroxide aqueous solution into a dynamic tubular reactor, and carrying out hydrolysis reaction at 10-70 DEG C for 0.5-5 minutes; according to the method, the 2-thiophenecarboxaldehyde is obtained by extracting the 2-thiophenecarboxaldehyde by using dichloromethane (DCM), and a continuous flow reactor technology is adopted, so that the reaction efficiency is remarkably improved. Compared with the traditional batch reaction, the continuous flow reactor has higher mass transfer and heat transfer efficiency, can realize rapid reaction, shortens the reaction time, and improves the product yield at the same time.

The invention discloses an acid and alkali resistant and salt spray resistant coating and a preparation method thereof, and relates to the field of coatings. When the acid and alkali resistant and salt fog resistant coating is prepared, 4-imidazole formaldehyde reacts with 3-aminopropyldimethoxymethylsilane and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and then reacts with hexamethyldisiloxane, octamethylcyclotetrasiloxane and 2, 4, 6, 8-tetramethylcyclotetrasiloxane to prepare modified polysiloxane; the preparation method comprises the following steps: reacting graphene oxide with 3-aminoethyl thiophene, 3-hexylthiophene and 3-allyl thiophene to prepare modified graphene; the preparation method comprises the following steps: uniformly mixing modified graphene, 1, 3-divinyl-1, 1, 3, 3-tetramethyldisiloxane platinum, a defoaming agent and modified polysiloxane to obtain a component A, taking waterborne epoxy emulsion as a component B, and uniformly mixing the component A and the component B to obtain the acid-alkali-resistant salt-fog-resistant coating. The prepared acid-alkali-resistant salt-fog-resistant coating has good acid-alkali-resistant, salt-fog-resistant, flame-retardant and hydrophobic properties.

The invention belongs to the technical field of super-hydrophobic coatings, and particularly relates to a lignin-based super-hydrophobic coating as well as a preparation method and application of the lignin-based super-hydrophobic coating. Comprising the following raw materials in parts by weight: 4 to 20 parts of double-amino-terminated polydimethylsiloxane, 4 to 20 parts of benzenetricarboxaldehyde, 3000 to 4000 parts of an organic solvent, 5 to 20 parts of a lignin nano bottle and 5 to 20 parts of nano silicon dioxide. The thickness of the prepared lignin-based super-hydrophobic coating is smaller than 20 microns, and the lignin-based super-hydrophobic coating has durability, hydrophobicity and photo-thermal performance, can be used in the field of photo-thermal deicing, reduces the possible adverse effect of the icing phenomenon on normal operation of equipment and facilities, and is higher in effectiveness and safety.

The invention relates to preparation of a crystalline allyl covalent organic framework material and application research of the crystalline allyl covalent organic framework material in benzamide cyclization green photocatalytic conversion. The SF-COF material is prepared by adopting a step-by-step synthesis method. The preparation method comprises the following steps: synthesizing a COF precursor by taking 1, 3-benzenetricarboxaldehyde and p-aminophenylacetonitrile as raw materials, and preparing the allylation covalent organic framework material with the electronic push-pull effect from the COF precursor and 5, 5 ', 5'-(benzene-1, 3, 5-triyl) tri (thiophene-2-formaldehyde) through a solvothermal method. The material is applied to the field of photocatalytic organic conversion, and benzamide cyclization and conversion of derivatives of benzamide are achieved under irradiation of a blue light LED. The prepared SF-COF has the advantages of efficient charge separation and electron conduction performance, good structural stability and chemical stability and the like. And a catalyzed organic reaction substrate has the advantages of wide universality range, good cycle stability and the like, and shows excellent photocatalytic conversion capability.

A method for catalyzing selective oxidation of 5-hydroxymethylfurfural by ion-doped birnessite belongs to the field of chemical engineering, and comprises the following steps: adding an ion-doped birnessite type catalyst into a solvent, and catalyzing 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxaldehyde and 2, 5-furandicarboxylic acid in the atmosphere of air or oxygen at the temperature of 25-240 DEG C, wherein the solvent is water, methanol, ethanol, acetonitrile, dichloromethane, N, N-dimethylformamide, N, N-dimethylacetamide and the like. The method is simple, few in by-products and environmentally friendly. By adopting ion-doped birnessite as the catalyst, the method has the advantages of economy, environmental protection, mild conditions, high selectivity, easiness in recovery of the catalyst and the like; the ion-doped birnessite catalyst can efficiently and highly selectively catalyze oxidation of 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxaldehyde, catalytic materials are easy to separate, the production cost is low, and the ion-doped birnessite catalyst has remarkable technical and economic effects and application prospects.

The invention relates to a non-noble metal-based paired electro-catalysis method for producing formic acid by coupling cathode dehalogenation with anode formaldehyde oxidation, which realizes efficient dehalogenation removal of pollutants and generation of high-value products. The Co-CuxO nanowire electrode with excellent catalytic performance is synthesized through a simple method and serves as a cathode and an anode at the same time, and the purpose that the cathode removes halogenated pollutants and the anode oxidizes formaldehyde to produce formic acid at the same time is achieved. Co-CuxO promotes generation of H *, the performance of electroreduction dehalogenation is improved, and the removal rate of trichloroacetic acid can reach 92.1% or above. And moreover, the reaction energy barrier is reduced, the selectivity of formic acid generated by oxidizing anode formaldehyde is improved, and the formic acid selectivity and Faraday efficiency can reach 100%. A paired electro-catalysis system shows extremely stable and outstanding electro-catalysis performance in the aspect of converting wastes into value-added products, and the problems of poor anode utilization rate and high energy consumption in the current electro-catalysis dehalogenation reaction are solved.

The invention discloses a covalent organic framework material based on a boric acid structure, a preparation method of the covalent organic framework material and application of the covalent organic framework material in dopamine detection, and relates to a covalent organic framework material and a preparation method and application of the covalent organic framework material. The technical problems that an existing dopamine recognition method is high in detection limit and harsh in recognition environment are solved. The periodic structure fragment of the covalent organic framework material based on the boric acid structure is shown in the specification. The 2-(4-boric acid phenyl)-5, 10-dinitro-1H-phenanthro [9, 10-d] imidazole diamine and 4, 4 ', 4', 4 ''-(pyrene-1, 3, 6, 8-tetrayl) tetrabenzaldehyde are subjected to a reaction to obtain the 2-(4-boric acid phenyl)-5, 10-dinitro-1H-phenanthro [9, 10-d] imidazole diamine derivative. The covalent organic framework material based on the boric acid structure is used for detecting dopamine, has relatively high selectivity and anti-interference capability, and is not interfered by amino acid in the environment. And the covalent organic framework material based on the boric acid structure can be embedded in the hydrogel, so that the hydrogel is convenient to carry. The method can be applied to detection of dopamine in environment and biological systems.

The invention discloses a C60-BODIPY triplet photosensitizer as well as a preparation method and photodynamic antibacterial application thereof. In the preparation process, a fullerene pyrrole ring compound and a BODIPY molecule are connected together through a benzene bridge group, and two ends of a bridge bond are respectively connected to a C atom on a fullerene pyrrole ring and a 6th site of the BODIPY molecule; a BODIPY-C60 binary molecule is formed; the preparation method comprises the following steps: reacting 9-anthracene formaldehyde with 2, 4-dimethyl pyrrole to generate a boron-dipyrromethene molecule of which the meso position is substituted by 9-anthryl, brominating the boron-dipyrromethene molecule at the 6 position by N-bromosuccinimide, coupling the boron-dipyrromethene molecule with p-formylphenylboronic acid, and carrying out Prato reaction on the coupled boron-dipyrromethene molecule with C60 and N-methylglycine to prepare the BODIPY-C60 binary triplet photosensitizer. The triplet photosensitizer has excellent photodynamic activity and relatively high reactive oxygen quantum yield, and can effectively kill bacteria.

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 synthesis method of a felinone intermediate, and relates to the technical field of medicine synthesis. The synthesis method comprises the following steps: firstly, taking a 500ml four-neck flask, adding 200ml of dichloromethane, adding 40g of 3-hydroxypropionitrile, finally adding 5g of a DMAP solid material, and stirring for 1 hour; continuously dropwise adding 50 g of ketene dimer, and after temperature-controlled dropwise adding is completed, carrying out heat preservation reaction for 2 hours to obtain a reaction solution; and taking the reaction liquid, washing with 200ml of saturated saline solution, preserving heat, taking the lower-layer material, washing with 200ml of purified water, preserving heat, taking the lower-layer material, finally washing with 200ml of saturated saline solution, taking the lower-layer material, distilling, and desolventizing to obtain the target product. The preparation method comprises the following steps: putting 40g of a target product and 200ml of DMF (Dimethyl Formamide) into a 500ml four-mouth flask, stirring, then adding 50g of 4-cyano-2-methoxybenzaldehyde into a constant-pressure dropping funnel and the like; the synthesis method is stable in reaction, low in raw material price, reasonable in synthesis route, basically free of by-products in the synthesis process, and high in target product purity.