55results about How to "Facilitate cross-linking" patented technology

The invention relates to the technical field of thickening agents, in particular to a thickening agent for fracturing fluid and a preparation method of the thickening agent, the thickening agent comprises a liquid material and a solid material, the mass ratio of the liquid material to the solid material is 1: (2.2-2.4), and the liquid material is composed of deionized water and N-methyl pyrrolidone. According to the preparation method disclosed by the invention, the konjaku flour is added in the preparation of the thickening agent, and after the konjaku flour is subjected to mixing reaction and curing treatment, amino functional groups in konjaku molecules can be subjected to cross-linking reaction with aldehyde groups of glutaraldehyde, so that water molecules are wrapped in a cross-linked network structure, and the internal friction force during fluid flowing is increased; and hydroxyl groups on molecular chains of the konjac glucomannan and aldehyde groups of glutaraldehyde are subjected to a condensation reaction to form covalent bonds, so that a cross-linking effect is achieved, a stable chemical cross-linked network structure is formed among the molecular chains of the konjac glucomannan, and the cross-linking performance of the thickening agent is effectively improved.

The invention relates to the technical field of preparation of heat-conducting silica gel sheets, and discloses a high-heat-conductivity heat-conducting silica gel sheet which comprises the following raw materials in parts by weight: 90 parts of silicone rubber, 40-50 parts of heat-conducting filler, 1-5 parts of a reinforcing agent, 1-3 parts of an anti-aging agent, 1-3 parts of an antioxidant, 2-3 parts of a cross-linking agent, 3-6 parts of a flame retardant and 1-2 parts of a catalyst. The silicon rubber is organic silicon rubber; the heat-conducting filler is graphite and aluminum oxide, and the ratio of the graphite to the aluminum oxide is 1: 2. When the heat-conducting silica gel sheet is prepared, the mechanical property and the heat resistance of the heat-conducting silica gel sheet can be improved by adding the reinforcing agent, and the weather resistance and the aging resistance of the heat-conducting silica gel sheet can be enhanced by the anti-aging agent, so that the heat-conducting silica gel sheet can be used outdoors or in a severe environment; by using the antioxidant, the oxidation resistance of the heat-conducting silica gel sheet can be improved, the service life of the heat-conducting silica gel sheet can be prolonged, and by using the flame retardant, the flame retardance of the heat-conducting silica gel sheet can be improved, and the safety of the heat-conducting silica gel sheet at high temperature is ensured.

The invention relates to a carbon fiber sizing agent, a preparation method of the carbon fiber sizing agent, sized carbon fiber and a preparation method of the sized carbon fiber, and belongs to the technical field of carbon fiber sizing agents. The carbon fiber sizing agent comprises benzoxazine resin, amino modified resin, an emulsifier and a solvent. The benzoxazine resin is used as a main raw material, and the amino-modified resin is introduced, so that when the sizing agent is used for sizing carbon fibers, the benzoxazine resin can be subjected to a grafting cross-linking reaction with the amino-modified resin at a high temperature, and the benzoxazine resin can be subjected to epoxy ring-opening polymerization to form a self-cross-linking reaction. The cross-linking reactions can improve the heat resistance and the interface performance of the sizing agent, so that the interface performance of a composite material formed by the carbon fibers and a resin matrix is effectively enhanced.

The invention belongs to the field of medical rubber materials, and particularly relates to a vulcanization preparation process of a medical puncture-resistant rubber gasket. A vulcanization preparation process of a medical puncture-resistant rubber gasket comprises the following steps: S1, raw rubber raw material preparation: crushing and mixing raw rubber raw materials to be vulcanized into raw rubber powder, removing impurities, and sieving; the raw rubber raw materials comprise halogenated butyl rubber, polyisoprene rubber and epichlorohydrin rubber; s2, preparing a rubber compound; the preparation method comprises the following steps: preheating an internal mixer to 80-100 DEG C, adding 80-90 parts by weight of raw rubber powder into the internal mixer, and refining at 115-125 DEG C for 5-9 minutes; adding 12-22 parts by weight of a modified composite filler, 2-6 parts by weight of zinc oxide, 1-3 parts by weight of stearic acid, 3-8 parts by weight of a crosslinking auxiliary agent and 0.5-1.2 parts by weight of an anti-aging agent, and mixing for 18-22 min; s3, calendaring and sheet discharging: calendaring and molding the rubber compound obtained in the step (2) to obtain a rubber compound sheet; s4, prevulcanization: putting the rubber compound sheet calendered in the step (3) into a mold cavity of a press vulcanizer, and carrying out under-vulcanization production to obtain a preformed sheet; the preformed rubber sheet in the step (4) and an organic solvent are subjected to cleaning treatment and drying and then put into a vulcanization mold to be subjected to vulcanization forming, the rubber gasket is obtained, the vulcanization temperature ranges from 140 DEG C to 150 DEG C, and the vulcanization time ranges from 3 min to 7 min. In order to solve the problem that the use performance of a medical rubber gasket is affected due to the fact that the medical rubber gasket is needled to fall scraps and is poor in rebound resilience, the invention provides the vulcanization preparation process of the medical needling-resistant rubber gasket.

The present application relates to the low temperature curing high-strength benzoxazine type silicone adhesive formula and use method, the formula includes the benzoxazine group containing organic silicon compound and organic alkali compound, the mass ratio of benzoxazine group containing organic silicon compound, organic alkali compound is 100:0.1-20.The adhesive of the present application is based on the cooperation between the benzoxazine group containing organic silicon compound and the basic catalyst, can be cured at low temperature, realize the higher strength bonding.The benzoxazine type silicone adhesive formula provided by the present application can be directly used as adhesive, and the bonding strength is high;It can also be used as a basic formula, used as an adhesive after adding other fillers, to meet the different needs of various special occasions.

The present invention discloses a curing additive comprising polymer monomers I and II, a low-impedance composite electrolyte comprising the curing additive, and a safe semi-solid battery comprising the low-impedance composite electrolyte, wherein polymer monomer I has a structure of formula 1:; polymer monomer II has a structure of formula 2:; wherein R1-R3 is selected from C1-C4 alkyl, alkoxy, halogenated alkyl or halogenated alkoxy, R4 is selected from C1-C6 alkylene or halogenated hydrocarbon, R5 is selected from C1-C2 alkyl or halogenated alkyl; R6, R7, and R8 are selected from C1-C4 alkylene or halogenated hydrocarbon. The present invention introduces polymer monomers I and II into the curing additive, utilizes the compounding effect between polymer monomers I and II, reduces the impedance of the safe semi-solid battery while ensuring safety, and obtains a low-impedance composite electrolyte and a semi-solid battery with high safety and low impedance.

The invention discloses essential oil microcapsule powder with high oil loading capacity and a preparation method thereof, and belongs to the technical field of microcapsules, the preparation method comprises the following steps: preparing a gelatin aqueous solution, preparing an Arabic gum aqueous solution, preparing an Arabic gum-starch aqueous solution, preparing a chitosan-tannic acid aqueous solution, preparing an emulsion, and performing primary crosslinking. Performing secondary crosslinking; the essential oil microcapsule powder prepared by the invention not only has high oil loading capacity and low surface oil content, but also has excellent slow release performance, solubility, long-term controlled release performance and flowability, and is uniform in particle size distribution.

The invention discloses composite hydrogel containing azelaic acid and a preparation method of the composite hydrogel, and belongs to the technical field of skin medicines.The azelaic acid is loaded and free azelaic acid is fixed through a layered structure of Ca / LDH powder, and then polymerization modification is conducted through dodecyl methacrylate, so that the composite hydrogel can be firmly smeared on the skin and is prevented from being scoured by sweat, and the skin care effect is good. Moreover, the Ca / LDH powder has an ion exchange characteristic between layers, so that a slow release effect on azelaic acid can be achieved; encapsulated menthol exists in the composite hydrogel containing azelaic acid, the encapsulated menthol is used for clathrating menthol through the clathration of a chitosan / cyclodextrin encapsulation carrier, and after clathration of the chitosan / cyclodextrin encapsulation carrier, a compact crystal structure of the carrier and the cavity clathration of cyclodextrin form a double barrier, so that the composite hydrogel containing azelaic acid has a good barrier effect. Contact between menthol and outside air and temperature is isolated, and volatilization loss of menthol is greatly reduced.

Disclosed is a secondary battery. The secondary battery has a structure including an internal core portion containing an electrolyte having a relatively lower crosslinking degree, and surrounded with a peripheral portion containing an electrolyte having a relatively higher crosslinking degree. It is possible to provide an effect of improving both ion conductivity and mechanical properties by virtue of such structural characteristics. In addition, the electrolyte portion having a lower crosslinking degree is confined by the electrolyte having a higher crosslinking degree to provide an effect of preventing electrolyte leakage. In addition, the secondary battery can be obtained by a simple method that includes crosslinking only the peripheral portion before the core portion reaches to a crosslinking temperature and is crosslinked under an environment preheated to the crosslinking temperature or higher. As a result, there is no adverse effect upon the processing efficiency, since any separate device or system line is not required to carry out the crosslinking.

The invention relates to the technical field of drying ovens for processing, and discloses a drying oven for water-based PU leather processing and a drying method.The drying oven comprises a preheating cavity and a primary drying cavity formed in one side of the preheating cavity, a main cavity is fixedly assembled on the side, away from the preheating cavity, of the primary drying cavity, and a final drying cavity is fixedly assembled on the side, away from the primary drying cavity, of the main cavity; a sliding rail mechanism is fixedly mounted on the inner side wall, perpendicular to the primary drying cavity, of the preheating cavity, a winding roller is slidably assembled on the side, away from the preheating cavity, of the sliding rail mechanism, and a medium-wave infrared lamp tube is fixedly mounted at the top end, facing the winding roller, of the interior of the preheating cavity. A first lamp tube set is fixedly installed on the inner side wall, perpendicular to the medium-wave infrared lamp tube, of the primary drying cavity. According to the invention, a sectional structure of the preheating cavity, the primary drying cavity, the main cavity and the final drying cavity is adopted, and differential heating assemblies of all the cavities are matched, so that a gradient drying process is realized, and the defects caused by rapid drying of a single cavity are thoroughly avoided.

This invention discloses a fermentation control method for adjusting the gluten protein network structure, relating to the field of food processing technology. It aims to solve the problem of the difficulty in stably constructing an ideal gluten protein network structure using existing technologies. The method includes the following steps: S1, selecting high-gluten wheat flour with a protein content of 12%-15%, and mixing it with water at a ratio of 1:0.5-0.6 to form a dough; S2, placing the dough in a static magnetic field environment with an intensity of 0.5-1.0 mT for 15-30 minutes; S3, transferring the dough to an environment with a temperature of 28-30℃ and a relative humidity of 70%-75% for a first fermentation of 60-90 minutes; S4, after the first fermentation, gently folding the dough 3-5 times, and then letting it rest for 10-15 minutes; S5, placing the dough again in an environment with a temperature of 32-35℃ and a relative humidity of 75%-80% for a second fermentation of 30-45 minutes. This invention has the advantage of making the gluten network structure formed in the dough during fermentation more uniform and dense.

The application provides a flame-retardant composite PVC alloy material and a preparation method thereof, and belongs to the technical field of flame-retardant materials.The flame-retardant composite PVC alloy material contains PVC, AS and ZnCl2 in components;in a combustion process, ZnCl2 can interact with the structure generated by the dehydrochlorination of PVC, the nitrile group of the acrylonitrile unit in AS and the aromatic structure of the styrene unit, promotes crosslinking of chain segments, cyclization of the nitrile group and aromatization reaction, and makes more combustible cracking products be converted into condensed phase residual carbon.At the same time, the existing technical prejudice that AS is flammable and flame retardant of PVC can only add flame retardant is overcome.Through the ingenious cooperation of the functions of the three components of PVC, AS and ZnCl2, the effect of jointly improving the flame-retardant property of the material is achieved.The flame-retardant composite PVC alloy material has good compatibility of components, uniform and excellent flame-retardant effect, no migration segregation, and no toxic gas generated in the combustion process.

The application belongs to the field of food preservation technology, and relates to a chitosan-gelatin composite preservative solution based on plasma-activated water modification and a preparation method and application thereof. First, PAW is used to prepare chitosan solution and gelatin solution respectively, and the composite preservative solution is obtained after mixing and homogenizing. The coating is dehydrated to form a preservative film. The PAW is prepared by treating deionized water with low-temperature plasma, and is rich in active ingredients such as hydroxyl radicals and hydrogen peroxide, which can effectively modify chitosan and gelatin, enhance intermolecular crosslinking, and form a composite film with a dense network structure. The composite film can be applied to fish preservation through coating or immersion, can effectively inhibit the growth of microorganisms, and can improve the color of fish fillets. In addition, the composite film has the function of delaying protein degradation by inhibiting endogenous protease activity, thereby maintaining the muscle tissue structure and prolonging the shelf life of chilled fish fillets. The application has the advantages of simple process, green safety, remarkable preservation effect, and wide market application prospect.

This invention relates to the field of biomedical engineering technology, specifically to a biopolymer film, its preparation method, and its applications. The biopolymer film is mainly composed of the following components: gelatin, sodium alginate, purple cabbage anthocyanin extract, and tannic acid-modified zinc oxide nanoparticles. The preparation method is as follows: tannic acid-modified zinc oxide nanoparticles are dispersed in an acidified solution, gelatin and sodium alginate are added, and the mixture is stirred to dissolve, obtaining a first mixed solution; purple cabbage anthocyanin extract is dissolved in water, tannic acid is added, and the mixture is stirred to dissolve, obtaining a second mixed solution; the first and second mixed solutions are mixed evenly to obtain a film-forming solution; the film-forming solution is poured into a mold and dried to form a film, thus obtaining the biopolymer film. The biopolymer film of this invention integrates the cross-linking enhancement, anthocyanin stabilization, and antibacterial functions of tannic acid, solving the problems of existing biopolymer films requiring multiple additives, complex processes, and functional constraints.

The application discloses a hard carbon negative electrode active material and a preparation method and application thereof. The preparation method of the hard carbon negative electrode active material comprises the following steps: (1) dissolving gelatin and a reducing sugar in water to obtain an electrostatic spinning solution; (2) performing electrostatic spinning on the electrostatic spinning solution by taking an aluminum foil as a receiving base material to obtain an electrostatic spinning nanofiber membrane, and then performing standing to completely volatilize water, so that a gelatin-based nanofiber negative electrode precursor is formed; and (3) performing pre-carbonization treatment on the gelatin-based nanofiber negative electrode precursor in a nitrogen atmosphere, and then performing high-temperature carbonization, so that the hard carbon negative electrode active material is obtained after cooling. The hard carbon negative electrode active material prepared by the method can realize the controllability of the pore structure and the carbon-hydrogen microstructure of the hard carbon negative electrode active material, the prepared hard carbon negative electrode active material does not need a support body and a binder, the weight and the volume of the electrode can be reduced, and the overall energy density and the power density of the battery can be improved.

This invention relates to the field of food processing technology and discloses a method for improving the stability and bioavailability of astaxanthin by combining piperine with a whey protein fibrillary-algin complex. The method specifically includes the following steps: S1. Preparation of whey protein fibrillary; S2. Loading piperine onto whey protein fibrillary; S3. Complexation of piperine-loaded whey protein fibrillary with sodium alginate; S4. Preparation of an astaxanthin-piperine co-encapsulated emulsion. This invention constructs a three-dimensional network resistant to pepsin hydrolysis through electrostatic complexation; enhances the effective concentration of piperine in the intestine through co-encapsulation, efficiently regulating the expression of P-gp efflux transport proteins and the transmembrane absorption of astaxanthin; and utilizes the functional property of piperine to inhibit the activity of P-gp efflux transport proteins to achieve efficient absorption of astaxanthin.

This invention belongs to the field of epoxy resins, specifically relating to toughening agent particles with a core-shell structure and a low-temperature impact-resistant epoxy resin composition. The toughening agent particles with a core-shell structure comprise a core of TPU nanoparticles and a shell of liquid crystal epoxy molecules grafted onto the TPU nanoparticles. Polyether-type TPU exhibits good low-temperature flexibility, and by grafting liquid crystal epoxy molecules, both the toughening effect and compatibility with the epoxy resin substrate are improved. The low-temperature impact-resistant epoxy resin composition comprises epoxy resin, toughening agent particles, and a composite accelerator system. By adding toughening agent particles, the notched impact strength at -40°C is increased by more than 60%.

To provide a fluorinated elastic copolymer in which the contents of metal elements and chloride ions are low, and a method for producing a fluorinated elastic copolymer, whereby it is possible to obtain a fluorinated elastic copolymer in which the contents of metal elements and chloride ions are low. A fluorinated elastic copolymer in which the content of metal elements is at most 20.0 ppm by mass and the content of chloride ions is at most 1 ppm by mass; and a method for producing a fluorinated elastic copolymer, which comprises coagulating a fluorinated elastic copolymer in a latex containing the fluorinated elastic copolymer by using an acid containing no metal elements or no chloride ions, and washing the coagulated fluorinated elastic copolymer with a liquid medium having a content of metal elements of at most 2.0 ppm by mass and a content of chloride ions of at most 2 ppm by mass.

This invention discloses a caprolactone copolymer foam material, its preparation method, and a shoe sole. The caprolactone copolymer foam material is prepared by supercritical foaming of the following components in parts by weight: 90-95 parts thermoplastic polyurethane; 1-3 parts antioxidant; 0.1-0.5 parts plasticizer; 0.5-2 parts ultraviolet absorber; 1-4 parts anti-hydrolysis agent; and 2-5 parts filler. The thermoplastic polyurethane is composed of the following components in parts by weight: 5-10 parts butanediol; 8-15 parts oxalic acid dihydrate; 2-5 parts caprolactone; 6-10 parts hexamethylene diisocyanate; and 1-3 parts neopentyl glycol. This material exhibits sufficiently light weight and excellent support and cushioning properties.

The application discloses a polylactic acid composition and a preparation method and application thereof, and belongs to the technical field of polylactic acid external dressings. The polylactic acid composition comprises components A, B and C. The component A comprises the following components in parts by weight: 45-50 parts of gelatin composite hydroxyl-terminated polylactic acid-glycolic acid copolymer, 20-25 parts of dimyristoyl phosphatidyl ethanolamine-polyethylene glycol-sodium alginate modified with amino, and microencapsulated TG enzyme. The component B is a mixed solution of hyaluronic acid oligosaccharide, tannic acid and calcium citrate. The component C is an aqueous solution of hyaluronic acid oligosaccharide and glycerol. The polylactic acid composition is combined with a casein-beta cyclodextrin embedded plant extract to obtain a skin care combination product. The skin care combination product can form a dense and hydrophobic drug application layer on the surface of the skin, and the volatile loss of the plant extract is reduced compared with the prior art.

The present application relates to the technical field of carbon-coated current collector, in particular to a preparation method of high-rate carbon-coated aluminum foil current collector for lithium battery, the present application improves the cohesion of the slurry and the contact with the surface of the aluminum foil through the modification of the binder, thereby effectively coping with the volume change caused by the deintercalation and intercalation of lithium ions at high rate, ensuring the stability of the electrode material during high-rate charge and discharge process. The present application also uses lithium methacrylate and butyl acrylate as monomers to prepare a polyacrylate binder, and adds hexamethylene diisocyanate to enhance the compatibility between the binder and the graphene loaded with carbon powder, so that the graphene loaded with carbon powder is more uniformly dispersed in the polyacrylate binder, the peeling strength of the carbon-coated aluminum foil current collector is enhanced, the capacity retention is improved, and the performance of the battery is improved.

The invention discloses a polyether modified hydroxyl-terminated and dyed vegetable oil polyol coating material and application thereof, and the polyether modified hydroxyl-terminated and dyed vegetable oil polyol coating material is prepared from a basic membrane material, polyether polyol and hydroxyl-terminated dye, the basic membrane material is prepared from castor oil-based polyol and isocyanate in a mass ratio of (1-2): 1; the polyether polyol accounts for 10-15% of the mass of the basic membrane material, and the hydroxyl-terminated dye accounts for 5-15% of the mass of the basic membrane material. Castor oil-based polyol, isocyanate, polyether polyol and a hydroxyl-terminated dye are compounded to prepare a coating material, the castor oil-based polyol and the polyether polyol react with isocyanate to form a soft and hard segment structure of polyurethane, and the introduction of the hydroxyl-terminated dye promotes cross-linking between chains to form an interpenetrating network structure, so that the cross-linked polyurethane film has a good heat-resistant property, and the heat-resistant property of the coating material is improved. The mechanical property and the stability of the material are improved, the flexibility, the hardness, the wear resistance and the functionality of the coating material can be accurately controlled by adjusting the proportion of all the components, and the requirement of fertilizer coating for high performance is met.

The invention provides an electrolyte and a lithium ion battery containing the same. The electrolyte comprises an electrolyte and a solvent; the solvent comprises fluoroethyl acetate and fluoroethylene carbonate. According to the electrolyte provided by the invention, an elastic coating can be formed on a negative electrode, the problem of SEI film rupture caused by volume expansion of a negative electrode material in the charging and discharging process is relieved, and meanwhile, the electrolyte has good oxidation resistance and can be adapted to a lithium ion battery adopting a high-voltage positive electrode material and a silicon-based negative electrode material; and the stability of the battery at high temperature and the cycle performance of the battery at high pressure are improved.

The invention discloses a stiff adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesives. The stiff adhesive is prepared from the following components in parts by weight: a vinyl monomer, acrylic ester, metacrylic acid ester, a functional monomer, protective glue, an emulsifier, an initiator, a cross-linking agent and deionized water, the functional monomer is at least one of acrylamide, hydroxyethyl acrylate, hydroxymethyl acrylamide and glycidyl methacrylate; the stiffening agent adhesive can be used as a stiffening agent coating, can also be used as an adhesive for wet bonding, and is used for bonding multiple layers of fabrics or paper and providing stiffness.

This invention discloses a high-adhesion UV-cured waterproof printing process for paper printed materials, belonging to the field of printing technology. The process includes vacuum dehydration of hydroxyl-terminated hyperbranched polyester, followed by reaction with isophorone diisocyanate using a catalyst to obtain a prepolymer; then, partial reaction with hydroxyethyl acrylate and monohydroxyl-terminated polydimethylsiloxane, followed by reaction with a silane coupling agent until the isocyanate peak disappears, yielding a modified resin; under light and water-protected conditions, the resin, reactive diluent, photoinitiator, fluorocarbon modified acrylate, and dehydrating agent are rapidly dispersed in a specific ratio to obtain a UV-cured waterproof varnish; this varnish is then coated onto paper printed materials with an ink layer, leveled, and subjected to UV primary curing, followed by standing at a suitable temperature and humidity for 24-48 hours to obtain a high-adhesion waterproof paper printed material. This invention promotes further cross-linking of the silane groups in the system, resulting in an extremely strong bond between the varnish layer and the paper printed material with an ink layer, thus achieving excellent high adhesion.

The application belongs to the technical field of eye medication, and specifically designs a metal riboflavin nanomaterial and a trans-epithelial corneal cross-linking preparation. The metal riboflavin (nRfpM) nanomaterial is obtained by coordinating modification of metal ions on the -HPO4- group of riboflavin sodium phosphate. n+ The lipophilicity of the nRfpM nanomaterial is greatly improved due to the coordination of the -HPO4- group for improving the hydrophilicity of the Rfp molecule, and the trans-epithelial delivery capacity of the product nRfpM nanomaterial is further improved, so that the trans-epithelial corneal cross-linking effect of the obtained product is greatly improved and can be comparable to the clinical de-epithelial corneal cross-linking effect, thereby providing a new type of reagent for trans-epithelial corneal cross-linking and having important clinical application prospects.

The invention relates to the technical field of sewage treatment, and discloses an MBR (Membrane Biological Reactor) sewage treatment membrane and a preparation method thereof, the preparation method comprises the following steps: step 1, dissolving and mixing; step 2, adding a functional auxiliary agent; step 3, defoaming treatment; step 4, film forming; 5, heat treatment; and step 6, cooling and curing. The volatility of DMAc is relatively low, the volatilization speed in the film forming process is relatively slow, residual volatile matter can be reduced after the film is cured, PVDF and PES can be well dissolved, uniform dispersion of a polymer is ensured, and therefore the overall quality and stability of the film are improved; the mold is placed in the environment with the temperature of 20-30 DEG C and the humidity of 30%-50%, DMAc in the polymer solution is gradually volatilized, and the beneficial effect that volatile matter cannot be released due to secondary injection molding after the treatment film is prepared is achieved.

This invention discloses a method for preparing a nano high-frequency high-speed substrate; belonging to the field of copper clad laminate substrate preparation technology; its key technical points include the following steps: (1) Mixing: Weigh 50-60 parts of liquid crystal bismaleimide / diallyl diphenyl ether copolymer, 20-30 parts of organic solvent, 17.5-30 parts of modified hexagonal nano boron nitride sheet KH570-BNNSs suspension, 1-2 parts of flame retardant, 0.2-0.5 parts of curing agent and 0.5-1.0 parts of coupling agent and pass through a mixture at 1500 rpm. (1) High-frequency high-speed adhesive is obtained by high-speed stirring for 2-4 hours; (2) Adhesive application: the low dielectric constant glass fiber cloth is unwound, initially impregnated with the high-frequency high-speed adhesive, and then impregnated on one side before being mainly impregnated to remove the air in the low dielectric constant glass fiber cloth. Then, it is extruded and dried in sequence to obtain a semi-cured sheet; (3) Assembly; (4) Pressing; The present invention aims to provide a method for preparing a nano high-frequency high-speed substrate with a scientific preparation method, high substrate strength and low water absorption rate; used for the preparation of copper clad laminate substrates.

This invention discloses a starch-based particleboard adhesive that cures rapidly at medium and low temperatures and its preparation method, belonging to the field of adhesive preparation technology. The starch-based particleboard adhesive of this invention comprises component A and component B; component A includes: 150 parts starch, 200-300 parts water, 20-25 parts concentrated hydrochloric acid, 12-18 parts dilute nitric acid, 25-40 parts sodium hydroxide solution, 6-9 parts initiator, 27-35 parts grafted monomer, and 2-5 parts emulsifier; component B includes: 8-11 parts ethylenediamine, a post-crosslinking agent. This starch-based particleboard adhesive effectively solves the problems of high curing temperature and long curing time in existing starch adhesives. While maintaining a relatively fast curing speed, it can reduce the curing temperature to 105℃, reducing the energy consumption in particleboard production. It can be widely used in the hot-press bonding of particleboard, plywood, fiberboard, and wood blocks.

The invention discloses light premixed mortar for green buildings and a preparation method of the light premixed mortar, and relates to the technical field of building materials. The lightweight premixed mortar for the green building is at least prepared from the following components: 35 to 40 parts of cement, 10 to 30 parts of fly ash, 0 to 10 parts of fine aggregate, 15 to 20 parts of clay sintered ceramsite, 5 to 10 parts of glass beads, 2 to 10 parts of corncob particles, 2 to 4 parts of hybrid chitosan and 1 to 3 parts of a water reducing agent. By adding the clay sintered ceramsite, the corncob particles and the hybrid chitosan and compounding the corncob particles and the chitosan, the heat insulation performance and the dry shrinkage resistance of the prepared lightweight premixed mortar for the green building are greatly improved, and the lightweight premixed mortar for the green building has relatively high economic benefits and environmental benefits.