66 results about "Furfurylamine" patented technology

The invention discloses a method for preparing furfuryl amine by reductive amination of biomass-based furfural, which comprises the following steps: adding furfural, a catalyst, ammonia water and a solvent into a closed reaction kettle in proportion, replacing air in the reaction kettle with high-purity hydrogen, and reacting in an oil bath pan for a period of time to obtain a target product furfuryl amine, the nano-catalyst provided by the invention is a nitrogen-doped porous hollow carbon sphere loaded nano bimetallic catalyst, takes noble metal and non-noble metal as a metal active center together, and has adjustability of macroscopic size and microstructure at the same time; the method has the advantages of simple reaction system, mild conditions, no pollution to the environment, high efficiency, energy conservation, low cost, few byproducts, high yield, high selectivity and the like, the furfural is efficiently converted into furfuryl amine at low temperature and low pressure within a short time, the used heterogeneous catalyst is stable and easy to recover, a new thought and direction are provided for enterprise production and scientific research, and the method is suitable for industrial production. The method has great significance on development and utilization of biomass-based furfural.

The invention relates to the technical field of building, chemical engineering and energy heat preservation, and discloses a silicon-based aerogel composite material and a preparation method and application thereof. The invention relates to a light-emitting diode (LED) photo-curing agent, which is prepared from tetraethyl orthosilicate, methyltrimethoxysilane, allyltriethoxysilane, pentaerythritol tetra (3-mercaptopropionate), N-(3-(triethoxysilyl) propyl) furfuryl amine, N-(3-(triethoxysilyl) propyl) maleimide, a photoacid generator and a photoinitiator. The composite material has a three-dimensional porous silicon dioxide network skeleton and a polymer interpenetrating network, the three-dimensional porous silicon dioxide network skeleton is formed by copolymerization of tetraethyl orthosilicate and methyltrimethoxysilane, and the polymer interpenetrating network is formed by reaction of pentaerythritol tetra (3-mercaptopropionate) and allyltriethoxysilane. The preparation method comprises the steps of sol preparation, light curing, solvent replacement, surface hydrophobic modification and normal-pressure drying. The material shows excellent thermal insulation and mechanical properties in the fields of building heat insulation, pipeline heat preservation and cryogenic heat insulation.

The invention discloses furfuryl amino polyfunctional epoxy resin, and belongs to the technical field of high polymer materials. The furfuryl amino polyfunctional epoxy resin contains a furan ring skeleton, a plurality of epoxy functional groups and tertiary amine atoms; a plurality of epoxy functional groups can react with various curing agents, so that cured epoxy resin is prepared; tertiary amine atoms can effectively reduce the curing temperature and the curing time of the anhydride curing agent; the furan ring skeleton can be prepared into cured self-repairing epoxy resin through Diels-Alder addition reaction, free radical copolymerization can be carried out to generate oligomer, and functional groups are introduced. Compared with commercially available E51 resin, the furfuryl amino polyfunctional epoxy resin has the advantages of low viscosity (at 23 DEG C, less than or equal to 5000 mPa.s) and low cost, and also has better transparency.

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.

The invention provides a de-adhesion electromagnetic shielding film material and a preparation method and application thereof, the electromagnetic shielding film material comprises the following preparation raw materials: a BMI-FA material, epoxy resin, a curing agent, film-forming resin and conductive particles, and the BMI-FA material is a product obtained by a Diels-Alder (D-A) reaction of bismaleimide and furfuryl amine. According to the invention, BMI-FA is introduced into epoxy resin to realize D-A crosslinking, epoxy resin with D-A dynamic bonds is obtained, high bonding strength of the electromagnetic shielding film to a device at room temperature is ensured, non-destructive separation of the electromagnetic shielding film to the device at a specific temperature is realized, the maintenance yield of the device is improved, and the production cost of the device is reduced. In addition, the use of an organic solvent is avoided in the de-bonding process, and no thermal decomposition gas exists, so that the adhesive is environment-friendly.

The application belongs to the technical field of organic synthesis, and discloses a preparation method of N-ethyl-2-(N-methyl pyrrolyl) pyrrole, which comprises the following steps: dissolving 1-furfuryl pyrrole, ethylamine and ethanol in water, adding hydrochloric acid into the water, heating and reacting, the reaction temperature is 150-180 DEG C, and the reaction time is 15-35 h; and the target product is obtained. The 1-furfuryl pyrrole is prepared by condensation reaction of 2-furfurylamine and 2,5-dimethoxy tetrahydrofuran, and then the target product N-ethyl-2-(N-methyl pyrrolyl) pyrrole is prepared by reaction of the 1-furfuryl pyrrole and ethylamine, and the raw materials are relatively cheap and have high industrial value.

The invention discloses biomass equol-furfuryl amine type benzoxazine resin and a preparation method thereof.The preparation method comprises the steps that furfuryl amine, formaldehyde and equol are directly added into a reactor, and then methylbenzene and an absolute ethyl alcohol solution are added; then heating to a reflux state and reacting for 10-15 hours; and after the reaction is completed, removing redundant solvent, separating out a final product by using normal hexane, removing normal hexane, and drying to obtain the biomass equol-furfuryl amine type benzoxazine monomer. Placing the biomass equol-furfuryl amine type benzoxazine monomer obtained in the step (1) in a mold, and then performing stepped curing to obtain the biomass equol-furfuryl amine type benzoxazine resin. The synthesis process is simple and reasonable, the purity is high, the yield is high, and the cost is low.

The application discloses a toughened composite polyurethane impact-resistant material based on dynamic covalent bond energy regulation, and belongs to the technical field of polyurethane materials. A double dynamic covalent network containing DA bonds and disulfide bonds is constructed by reacting polyurethane prepolymer, furfurylamine, cystine diethyl ester and bismaleimide, then nano molybdenum disulfide is modified by silane, then a metal-polyphenol / polymer composite interface layer is constructed on the surface of aramid fiber by tannic acid-iron complex and polyethyleneimine, finally, the components are mixed, impregnated and hot-pressed to obtain the composite polyurethane material. The application effectively dissipates impact energy through the reversible rupture and recombination of dynamic covalent bonds, and enhances the interfacial bonding force between components by using multiple interface modification, so that the material has excellent impact resistance, high strength, high ductility and efficient self-repairing function, solves the problems of easy damage of the interface of traditional composite materials, insufficient impact resistance and irreversible damage, and has wide application prospect in the fields of safety protection and buffer components.

The invention relates to a paraffin modified organic silicon pressure-sensitive adhesive with viscosity switching triggered by temperature, and belongs to the technical field of pressure-sensitive adhesives. The preparation method comprises the following steps: by taking high-temperature wax as a core material and melamine-formaldehyde resin and a KH-550 modified nano boron nitride hybrid shell layer as wall materials, obtaining a phase change microcapsule by adopting an in-situ polymerization method, and then grafting Mal-PEG2-COOH to obtain a modified phase change microcapsule; the preparation method comprises the following steps: forming an intermediate from isocyanate propyl triethoxy silane and furfuryl amine, hydrolyzing to modify an organic silicon pressure-sensitive base adhesive, and preparing the organic silicon pressure-sensitive adhesive from the modified organic silicon pressure-sensitive base adhesive and the modified phase-change microcapsules. The DA reaction is performed at normal temperature to form a covalent cross-linked network, so that the pressure-sensitive adhesive is endowed with high-strength adhesive property; during heating, paraffin melting and DA reverse reaction cooperate to reduce viscosity, and viscosity switching triggered by temperature is achieved; and the modified nano boron nitride can accelerate temperature response and enhance the mechanical property of the microcapsule. The organic silicon pressure-sensitive adhesive prepared by the invention has the effect of temperature-triggered viscosity switching.

A biomass benzoxazine-based shape memory resin, a preparation method therefor, and an application thereof. The method includes: using biomass furfuryl amine, vanillic aldehyde, and paraformaldehyde as raw materials; obtaining an aldehyde group-containing biomass benzoxazine monomer by means of a heating reaction; mixing the aldehyde group-containing biomass benzoxazine monomer with polyether amine, and obtaining a Schiff base biomass benzoxazine monomer by means of a coupling reaction; and curing the Schiff base biomass benzoxazine monomer to obtain the biomass benzoxazine resin having a shape memory function. The benzoxazine-based shape memory resin has excellent thermal performance, high tensile modulus, high strength; an original shape can be permanently changed according to needs, the defect that traditional cross-linked polymers cannot be reprocessed after being formed is overcome, a recovery function under the condition of heating stimulation achieved, an application range of a shape memory polymer widened due to excellent thermal performance and mechanical performance.

The invention discloses a prepreg sheet, a laminated board and a printed circuit board. The prepreg sheet is formed by impregnating a substrate in a resin composition. The resin composition comprises a furan modified resin, a thermosetting resin and a filler, and the furan modified resin is obtained through a reaction of a polymer resin and 2-furanmethylamine. The prepreg sheet, the laminated board and the printed circuit board disclosed by the invention have the characteristics of excellent electrical performance, high heat resistance, high dimensional stability and recoverability.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of furosemide. The preparation method of furosemide comprises the following steps: chlorosulfonation: reacting chlorosulfonic acid and 2,4-dichlorobenzoic acid, hydrolyzing, filtering, and obtaining 2,4-dichloro-5-sulfonyl chlorobenzoic acid; amination: adding 2,4-dichloro-5-sulfonyl chlorobenzoic acid into ammonia water, reacting, neutralizing, filtering, purifying, and obtaining 2,4-dichloro-5-sulfonamidobenzoic acid; condensation: reacting 2-furfurylamine and 2,4-dichloro-5-sulfonamidobenzoic acid, and obtaining furosemide crude product; decolorization: adding the furosemide crude product into a saturated sodium bicarbonate solution, adding activated carbon for decolorization, neutralizing, and crystallizing, and thus furosemide product is obtained. The raw material used in the application is easy to obtain and low in price, the comprehensive reaction period is short, the amount of hazardous waste generated is small, the prepared furosemide is high in purity and high in total yield, the comprehensive cost of the whole preparation process is low, and the application is suitable for industrial production.

The application discloses a kind of flame-retardant bio-based copolymer resin based on PT-fa, to obtain mixed resin with bio-based benzoxazine monomer PT-fa and bisphenol A-aniline type benzoxazine BA-a as raw material, then, mixed resin is heat cured to obtain flame-retardant bio-based copolymer resin Poly (PT-fa / BA-a) based on PT-fa, the obtained copolymer resin has high thermal stability and high flame retardant performance;The PT-fa is prepared by solvent-free synthesis method with hydroxyl tyrosol, furfurylamine and polyformaldehyde as raw material, the obtained monomer has high purity.The glass transition temperature T g of the Poly (PT-fa / BA-a) is 180-300 DEG C;The temperature T di of 5% thermal weight loss under nitrogen atmosphere is 328-340 DEG C, the carbon residue rate Y c at 800 DEG C is 38-60%;Heat release capacity HRC is 80-175 J / g·K, and the total heat release THR is 10-21 kJ / g.The preparation method comprises the following steps: 1, the preparation of bio-based benzoxazine monomer PT-fa;2, the preparation of flame-retardant bio-based copolymer resin based on PT-fa.

This invention discloses a photo / thermal dual-curing bio-based UV ink composition and its preparation method, relating to the field of UV-curable printing materials. It comprises the following raw materials in parts by weight: 100 parts of polypropylene carbonate diol-type polyurethane acrylate oligomer, 5-20 parts of a thermosetting component, 50-150 parts of an reactive diluent, 2-10 parts of a free radical photoinitiator, 0-80 parts of a colorant, and 0-10 parts of other additives; the thermosetting component includes eugenol-furfurylamine type benzoxazine monomer. The UV ink composition obtained by this invention can be heat-treated after photocuring. The polybenzoxazine network is interpenetrated after the formed polyurethane acrylate pre-crosslinked network, forming an interpenetrating or interpenetrating polymer network, and additional crosslinking can occur. This not only improves the strength and flexibility of the ink layer but also effectively enhances solvent resistance and adhesion, resulting in a UV ink composition with excellent overall performance.

The invention relates to a preparation method of cuprous oxide polycrystalline particles with a micro-nano structure, and belongs to the technical field of cuprous oxide polycrystal preparation, the preparation method comprises the following steps: firstly, dropwise adding an organic amine aqueous solution into a bivalent copper salt aqueous solution, stirring for reaction, then dropwise adding a reducing agent solution into a reaction solution, continuously stirring for reaction, and centrifuging and drying the reaction solution to obtain a product; the average particle size of the micro-nano structure cuprous oxide polycrystalline particles is 1-2.3 [mu] m, and the micro-nano structure cuprous oxide polycrystalline particles are formed by co-growth of small-size cuprous oxide crystals; the grain size of the small-size cuprous oxide crystal forming the cuprous oxide polycrystalline particle with the micro-nano structure is determined by the type of the organic amine, the organic amine is one or more of aniline, furfuryl amine, benzylamine, phenylethylamine and n-butylamine, and the grain size of the small-size cuprous oxide crystal is 40-600 nm. The crystal particle size of the polycrystalline particles formed by the method disclosed by the invention can be controllably adjusted in a range of 40-600nm by selecting different organic amines.

The invention provides a reaction kettle for high-pressure preparation of furfuryl amine based on sealing at a mounting position, and relates to the technical field of high-pressure reaction kettles, the reaction kettle comprises a kettle body, a kettle cover body, a gas inlet part and a safety relief valve mechanism. The kettle cover body is sealed and fixed with the kettle body through a tight connecting assembly, the gas inlet part is used for introducing inert gas, and the safety pressure relief valve mechanism integrates the functions of gas pressure detection and automatic pressure relief. The mechanism is communicated with the inside of the kettle body through the mounting cylinder seat, the pressure regulating channel is internally provided with a pressure relief movable sealing part and is divided into a reference cavity and a pressure relief cavity, the pressure regulating pump regulates the pressure intensity of the reference cavity, and the barometer monitors the pressure in real time. In an initial state, the pressure relief hole is blocked by the sealing component; and when the pressure of the kettle body exceeds the limit, the sealing part displaces to communicate the pressure relief hole, and high-pressure gas is quickly released through the pressure relief part. By dynamically balancing air pressure and electric linkage response, accurate control and overload protection of high-pressure reaction are realized, high sealing performance and reliability are achieved, and safety and efficiency of furfuryl amine preparation are remarkably improved.

The invention discloses a genetically engineered bacterium and a method for preparing furyl organic amine by using the genetically engineered bacterium. The method comprises the following steps: carrying out catalytic reaction in a reaction system containing an amino donor by using a cell carrier for expressing transaminase; according to the catalytic reaction, aldehyde group / carbonyl group of a reaction substrate is reduced and aminated into amino group, so that furyl organic amine is prepared. According to one embodiment of the invention, synthesis of furfuryl amine is catalyzed by utilizing rhodococcus red expressing transaminase, the enzyme activity of free cells of the rhodococcus is far higher than that in escherichia coli and can reach 1.5 times, 100% conversion of a substrate can be realized, and the reaction time is less than half or more of that of the escherichia coli; the substrate tolerance of the free cells of the rhodococcus is far higher than that in escherichia coli and can reach more than 5 times; the product tolerance of the free cells of the rhodococcus is far higher than that in escherichia coli and can reach 2.5 times; compared with 2-3 times of Escherichia coli, the batch of Rhodococcus free cell reaction is increased to 7-9 times.

The invention discloses an anisotropic conductive stretchable electronic solder and a preparation method and application thereof, the stretchable electronic solder comprises a polymer adhesive and a silver nanosheet, and the mass ratio of the polymer adhesive to the silver nanosheet is (5-20): 1; the high-molecular adhesive is obtained by heating bisphenol A diglycidyl ether, polyethylene glycol diglycidyl ether and furfuryl amine at 40-60 DEG C to react, and then heating with N, N '-(4, 4'-methylene diphenyl) bismaleimide at 60-80 DEG C to react. According to the anisotropic conductive stretchable electronic solder provided by the invention, by virtue of excellent flexibility and stretchability endowed by the dynamic chemical polymer adhesive, the problem of stress concentration caused by physicochemical property difference of a soft / hard base material can be effectively counteracted, stable connection of an electrical interface is always kept in a stretching deformation process, and the reliability of the electronic solder is improved. Universal welding of flexible, stretchable and rigid materials and devices is successfully achieved.

The present invention relates to a method for preparing methyl pentanediamine carbamate using furfurylamine as a raw material. This method uses furfurylamine, a downstream product of the biomass-based platform molecule furfural, as a raw material. Through the hydrodeamination amination of methyl 2-furfurylmethylcarbamate, N-(5-aminopentyl)carbamic acid methyl ester is prepared, and finally methyl pentanediamine carbamate is synthesized. The present invention provides a new process route for synthesizing methyl pentanediamine carbamate, solves the problem of serious pollution in the production process of PDI, meets the development requirements of green chemistry, and has broad industrial prospects.

The invention discloses novel benzoxazine and a synthesis method thereof, and belongs to the technical field of chemical synthesis. The synthesis method comprises the following steps: adding eugenol, furfuryl amine and paraformaldehyde into a three-necked flask according to a ratio of 1: 1: 2, then adding a toluene solution, uniformly mixing, then heating at 100 DEG C for 3 hours to synthesize a compound A, mixing the compound A and 1, 1, 5, 5-tetramethyl-3, 3-diphenyl trisiloxane according to a ratio of 1: 2, adding 1, 3-divinyl-1, 1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 2, 3, 3, 3-tetramethyldisiloxane platinum (0) as a catalyst and toluene are added into a flask together, and a heating reaction is performed at 75 DEG C for 12 h to synthesize a compound B; according to the invention, a Mannich reaction is used to obtain a novel benzoxazine resin TDT-fa (compound B). The invention relates to a preparation method of benzoxazine. The preparation method is characterized in that a dibenzoxazine monomer intermediate structure is a siloxane structure.

The application discloses a benzoxazine monomer containing polymerizable double bonds, and a cured resin and a composite resin thereof, and relates to the technical field of resin synthesis. Under the protection of nitrogen, an aldehyde compound, furfurylamine, 2,2'-diallyl bisphenol A and an organic solvent are added into a reaction container, and then the mixture is reacted at 80-120 DEG C for 2-24 hours, and the 2,2'-diallyl bisphenol A-furfurylamine type benzoxazine monomer is obtained after post-treatment. The obtained benzoxazine monomer containing polymerizable double bonds is dissolved and then heat-cured to obtain a cured resin. The obtained benzoxazine monomer containing polymerizable double bonds is mixed and dissolved with polyphenyl ether and its modified products, and then heat-cured to obtain a benzoxazine / polyphenyl ether composite resin. The 2,2'-diallyl bisphenol A-furfurylamine type benzoxazine monomer is synthesized by using a relatively simple method, and then a 2,2'-diallyl bisphenol A-furfurylamine type benzoxazine / polyphenyl ether composite resin is obtained by blending and heat-curing. The composite resin has excellent thermal performance and high-frequency dielectric performance.

The invention discloses a preparation method of a recoverable cross-linked polyurethane elastomer with high toughness and excellent flame retardance. The polyurethane elastomer is prepared by cross-linking a linear polyurethane molecular chain and a linear flame-retardant molecular chain through dynamic covalent bonds. Wherein the linear polyurethane molecular chain is prepared from diisocyanate, polyether glycol and glycol with a maleic anhydride group; the linear flame-retardant molecular chain is prepared by firstly carrying out nucleophilic substitution on phenylphosphonic dichloride and micromolecular diol, and then, carrying out nucleophilic substitution on the phenylphosphonic dichloride and the micromolecular diol, diisocyanate and furanmethylamine. After the two linear molecular chains are mixed, the solvent is removed, and the polyurethane elastomer can be prepared after drying and curing, and the elastomer has excellent strength, toughness and flame retardance and can be efficiently recycled in a hot pressing or solvent dissolving mode.

The invention provides a light and heat dual repairable epoxy resin-based composite material and a preparation method thereof, and the preparation method comprises the following steps: adding a modified graphite-based nanofiller into a single epoxy diluent, carrying out ultrasonic treatment, adding epoxy resin and furfuryl amine into the single epoxy diluent, and carrying out a reaction under a heating condition to obtain PDA (at) Gra / FA-EP after the reaction is completed; the PDA (at) Gra / FA-EP and bismaleimide are mixed and smashed, and mixed powder is obtained; carrying out vacuum treatment on the mixed powder to obtain a blend; and carrying out molding, vacuum treatment and drying on the blend to obtain the light and heat dual repairable epoxy resin-based composite material. According to the photo-thermal repairable epoxy resin-based composite material, the graphite-based substance is coated with dopamine, so that the graphite-based substance is well dispersed in epoxy resin, and the situation that the photo-thermal conversion efficiency is affected due to the fact that the graphite structure of the graphite-based substance is damaged due to oxidation modification is avoided.

The application discloses a kind of dirt-resistant protective fabric and preparation method thereof, it is related to fabric technical field.The application is prepared when dirt-resistant protective fabric, six chloro-cyclotriphosphazene, p-hydroxybenzaldehyde reaction is obtained intermediate;Intermediate, 2-furfurylamine reaction is obtained composite flame retardant;Polyester chip, composite flame retardant is mixed after extruding granulation, and then melt spinning is prepared polyester fiber;Polyester fiber is woven into polyester fabric by textile equipment;Vinyl rare earth europium complex, vinyl azobenzene, dibenzoyl peroxide, toluene are prepared into mixed finishing liquid;Anti-fouling finishing agent, deionized water are prepared into anti-fouling finishing liquid;Polyester fabric is sequentially finished with mixed finishing liquid, anti-fouling finishing liquid, and dirt-resistant protective fabric is prepared.The dirt-resistant protective fabric prepared by the application has the advantages of dirt resistance, flame retardance and anti-uv aging.

The invention discloses a nitrogen-doped porous hollow carbon sphere loaded nano bimetallic catalyst and a preparation method and application thereof, the expression of the nitrogen-doped porous hollow carbon sphere loaded nano bimetallic catalyst is M (at) NHCS-T, M is a bimetallic active component, NHCS is a nitrogen-doped porous hollow carbon sphere carrier, and T is pyrolysis temperature; the bimetallic active component comprises a noble metal and a base metal, and the mass ratio of the noble metal to the base metal is (0.05-5): 1; the noble metal comprises any one of ruthenium, platinum, palladium, rhodium and gold, and the base metal comprises any one of cobalt, nickel and copper; the pyrolysis temperature is 600 to 900 DEG C; according to the nitrogen-doped porous hollow carbon sphere loaded nano bimetallic catalyst, noble metal and non-noble metal are jointly used as a metal active center, bimetallic active sites have unique electronic effects and geometric effects, furfural can be efficiently and highly selectively catalyzed to be subjected to reductive amination to prepare furfuryl amine, the furfuryl amine yield is greatly increased, the preparation method is simple, and the catalyst is suitable for industrial production. The method is green, efficient, excellent in catalytic performance and simple in reaction system.

The present application relates to an environment-friendly water-based industrial anticorrosive coating and a preparation method thereof, and belongs to the technical field of coating. The coating composition comprises chloroether resin emulsion, corrosion inhibition emulsion, barrier agent, slag composite filler, etc. The corrosion inhibition emulsion is prepared by using hexamethylcyclotrisilazane, glycidyl furfuryl ether and 2-furfurylamine in isopropyl alcohol as raw materials and tetramethylammonium hydroxide as catalyst, and then emulsified with deionized water and composite emulsifier after removing isopropyl alcohol. The barrier agent is prepared by modifying the titanium aluminum carbide sheet layer after acid stripping with 3-aminopropyltriethoxysilane. The slag composite filler is prepared by sintering blast furnace slag powder, zeolite powder and potassium dihydrogen phosphate, etching with citric acid, and then modifying with boron nitride and KH-172 silane coupling agent. The coating uses water as the dispersion medium to reduce VOC emissions, and constructs a protective system in multiple dimensions through chemical active corrosion protection, physical layered barrier, dense film formation and interface covalent bonding, and is suitable for harsh corrosion scenes such as industrial heavy-duty corrosion, ships and marine engineering.

The invention relates to the field of synthesis of benzoxazine resin, in particular to two kinds of high-frequency low-dielectric benzoxazine resin and a preparation method thereof. Comprising the following steps: synthesizing furfuryl amine into furfuryl amine-derived furfuryl diamine DFDA, carrying out condensation reaction on the furfuryl amine-derived furfuryl diamine DFDA serving as an amine source, magnolol or bisphenol A serving as a phenol source and p-tert-butylphenol serving as an end-capping reagent and paraformaldehyde to synthesize two benzoxazine monomers which are respectively named as DFDA-MAG-PTB and DFDA-BPA-PTB, and carrying out high-temperature thermocuring on the monomers to obtain two polybenzoxazines. The benzoxazine resin prepared by the method is large in bio-based raw material proportion and environment-friendly; the obtained novel benzoxazine resin contains allyl, furan ring and other structures, so that the crosslinking density can be increased, and the carbon yield can be increased; the tert-butyl group can increase the free volume of molecules and reduce the dielectric constant.

The application discloses a cake-separation protein-based adhesive as well as a preparation method and application thereof, and relates to the technical field of adhesives.The adhesive is prepared from the following components: trifuran formaldehyde diimine, a carbonyl compound, cake-separation protein, furan amine, an ester compound, a curing agent, an initiator and water.The adhesive has good mechanical properties, high water resistance and fast curing.

The application relates to the technical field of building, chemical industry and energy insulation, and discloses a silicon-based aerogel composite material and a preparation method and application thereof, which is prepared from tetraethyl orthosilicate, methyltrimethoxysilane, allyltriethoxysilane, pentaerythritol tetra(3-mercaptopropionate), N-(3-(triethoxysilyl)propyl)furfurylamine, N-(3-(triethoxysilyl)propyl)maleimide, a photoacid generator and a photoinitiator. The composite material has a three-dimensional porous silica network skeleton and a polymer interpenetrating network, the former is formed by copolymerization of tetraethyl orthosilicate and methyltrimethoxysilane, and the latter is formed by reaction of pentaerythritol tetra(3-mercaptopropionate) and allyltriethoxysilane. The preparation method comprises the steps of sol preparation, photocuring, solvent replacement, surface hydrophobic modification and normal-pressure drying. The material exhibits excellent thermal insulation and mechanical properties in the fields of building thermal insulation, pipeline thermal insulation and cryogenic insulation.