167results about How to "Reduce reactivity" patented technology

The invention belongs to the technical field of polyurethane pouring sealants, and particularly relates to a hydrolysis-resistant heat-conducting polyurethane pouring sealant and a preparation method thereof. The hydrolysis-resistant heat-conducting polyurethane pouring sealant is prepared from a component A and a component B according to the mass ratio of 100: (18.5-20.5), and the component A comprises the following raw materials: amine ether polyol, modified castor oil, a flame retardant, a heat-conducting filler, a silane coupling agent and a catalyst; the component B is prepared from the following raw materials: polymerized MDI (Diphenyl Diisocyanate), MDI-50 and carbodiimide modified MDI; the amine ether polyol is prepared by carrying out a reaction on 3, 3 '-dimethyl-4, 4'-diaminodiphenylmethane and epoxypropane. The hydrolysis-resistant heat-conducting polyurethane pouring sealant disclosed by the invention not only has good technological operation performance and heat-conducting performance, but also has excellent hydrolysis resistance, and still has good mechanical property and electrical insulation property after being aged; the invention also provides a scientific, reasonable, simple and feasible preparation method.

The invention relates to the field of building materials, and particularly discloses a coal gangue activation treatment method, prepared calcined coal gangue and application, the treatment method comprises the following steps: pretreatment: crushing and screening coal gangue to obtain coal gangue particles; the coal gangue particles are treated in a eutectic solvent, ultrasonic-assisted treatment is carried out for 2-3 h, pretreated coal gangue is obtained after water washing, the eutectic solvent comprises an HBA component and an HBD component, the HBA component is a mixture of choline chloride and an amide compound, and the HBD component is a mixture of a carboxylic acid mixture and polyhydric alcohol; calcining: calcining the pretreated coal gangue at 400-450 DEG C to obtain calcined coal gangue, the invention also discloses the calcined coal gangue prepared by the method, and the method has the characteristic of realizing coal gangue activation treatment under lower energy consumption.

The embodiment of the invention provides a lithium slag-based composite cementing material and a preparation method thereof, and relates to the field of composite materials. The preparation method of the lithium slag-based composite cementing material comprises the following steps that S100, lithium slag and an inorganic acid solution are mixed and then activated, an activated material is obtained, and the component of the lithium slag comprises aluminosilicate; s200, an alkaline substance and the activated material are mechanically mixed, a modified material is obtained, the pH of the modified material is 7-10, then the modified material is dried, and modified powder is obtained; and S300, grinding the modified powder and auxiliary materials to obtain the lithium slag-based composite cementing material. The preparation method provided by the invention is high in lithium slag mixing amount and relatively low in cost, and the prepared lithium slag-based composite cementing material is also relatively high in compressive strength.

The invention provides aluminum-doped hematite, a preparation method of the aluminum-doped hematite and application of the aluminum-doped hematite in catalyzing peroxides to degrade organic pollutants or remove pathogenic bacteria. The preparation method of the aluminum-doped hematite comprises the following steps: adding ferric iron salt and aluminum salt into deionized water, reacting, precipitating to separate out a product, washing, drying and grinding to obtain a precursor; calcining the precursor, and then washing and drying to obtain the aluminum-doped hematite. The preparation method is simple, cheap and easily available in raw materials, low in cost, green, safe and environment-friendly; the aluminum element is introduced into the hematite, so that the catalytic activity of the hematite is improved, and the catalytic condition is easy to realize; the aluminum-doped hematite disclosed by the invention has excellent capability of activating peroxide, so that the aluminum-doped hematite shows excellent performance in the aspects of removing environmental organic pollutants and sterilizing.

The invention relates to the technical field of nano composite materials, and particularly discloses a super wear-resistant self-lubricating carbon nano polymer and a preparation process thereof. The invention discloses a super wear-resistant self-lubricating carbon nano polymer which is prepared from the following raw materials in parts by weight: 35-50 parts of phenolic resin, 5-10 parts of bisphenol F resin, 0.2-1 part of a defoaming agent, 5-10 parts of modified phenolic resin fiber, 1-1.5 parts of pretreated graphene, 5-10 parts of polytetrafluoroethylene, 12-18 parts of nano aluminum oxide, 6-10 parts of talcum powder, 0.5-3 parts of zirconium oxide, 0.2-1 part of a flatting agent and 1-5 parts of silicon carbide. 0.2-1 part of an antioxidant, 0.2-1 part of an ultraviolet absorbent and 25-35 parts of cardanol. The super-wear-resistant self-lubricating carbon nano polymer prepared by the invention has the advantages of good toughness and good wear resistance.

The invention relates to the technical field of water treatment, and particularly discloses a seawater desalination reverse osmosis membrane and a preparation method thereof. The sea water desalination reverse osmosis membrane comprises a base membrane layer and a separation layer, the base membrane layer comprises a base layer and a porous support layer, and the sea water desalination reverse osmosis membrane is characterized in that the separation layer comprises the following raw materials in parts by weight: 15-20 parts of bis-2-6-N, N-dimethyl formamide, 1-5 parts of sodium hydroxide and 1-5 parts of sodium hydroxide; the environment-friendly anti-corrosion coating is prepared from the following components in parts by weight: 20 to 30 parts of N, N-(2-ethoxyl) diaminotoluene, 10 to 15 parts of triethylamine, 20 to 30 parts of camphorsulfonic acid, 10 to 15 parts of trifluoroacetic anhydride, 0.5 to 1.5 parts of sodium dodecyl sulfate, 10.5 to 20.5 parts of modified microcapsules, 0.5 to 1.5 parts of trimesoyl chloride and 150 to 180 parts of isoparaffin solvent. The reverse osmosis membrane for seawater desalination can be used in the field of seawater desalination, and has the advantages of high chemical stability, large water flux and excellent durability.

The invention discloses a preparation method and application of a nano zero-valent iron-zeolite core-shell structure composite material, and relates to the technical field of nano zero-valent iron composite material preparation. A layer of zeolite core-shell structure is generated on the surface of the nano zero-valent iron to prevent iron oxide from being generated on the surface of nZVI to reduce the reaction activity, and meanwhile, the mass ratio of zeolite / zero-valent iron strongly affects gradual release of Fe < 2 + > in the nano zero-valent iron-zeolite core-shell structure composite material, so that iron core oxidation is slowed down, and the reaction activity of nZVI is improved. The release speed of electrons is also slowed down, the gradually released electrons form a long-time and stable activation effect on persulfate, and the degradation of trichlorophenol can be promoted. According to the preparation method and application of the nano zero-valent iron-zeolite core-shell structure composite material, the nano zero-valent iron-zeolite core-shell structure composite material can be obtained.

The invention provides an antioxidant graphite material and a preparation method thereof. The preparation method of the anti-oxidation graphite material comprises the following steps: mixing an ester compound containing a boron element with a binder coal pitch, heating and kneading the mixture and coke aggregate (pitch coke or petroleum coke) to form a pasty material, cooling the pasty material, preparing pressed powder, performing isostatic compaction, roasting and graphitizing to obtain the anti-oxidation graphite material. The whole technical route is the same as a large-scale graphite production process of an enterprise and can be directly combined with an existing production process, and the aim of improving the graphitization degree so as to improve the oxidation resistance of the graphite can be achieved without increasing procedures and production cost. Boron and boron in the boron-containing solvent can be distributed in the bulk phase of graphite and reduce the number and reaction activity of carbon active sites, so that the boron-containing solvent is an intrinsic oxidation inhibitor, and the inhibition effect of the bulk phase cannot be affected even if surface loss is caused by abrasion or corrosion.

The present invention discloses a polyurea-ceramic composite coating for the leading edge of a wind turbine blade and a preparation method thereof. The coating comprises aspartic acid ester polyurea and ceramics. The ceramics have good strength and hardness, and can improve the hardness and toughness of the coating as a whole, and improve the overall anti-rainwater erosion performance of the coating. Specifically, the polyaspartic acid ester polyurea is made of polyetheramine, diisocyanate, polyaspartic acid ester resin and isocyanate as raw materials, and the polyetheramine is a hydrophilic monomer, so that the system has good hydrophilicity, which is conducive to forming a water film on the leading edge surface of the wind turbine blade, and effectively buffering the impact of raindrops on the leading edge of the wind turbine blade.

The invention relates to a high-strength supported noble metal catalyst as well as a preparation method and application thereof. An additive, an adhesive and an extrusion aid are introduced into a carrier to modify the structure of the carrier so as to improve the strength of the carrier, and meanwhile, acidizing treatment is performed to enhance the acid resistance of the carrier in an HCl atmosphere; in addition, the water-resistant strength of the catalyst in water vapor is enhanced by adopting a hydrothermal method to impregnate and load noble metal. Particularly, the catalyst can be used for a reaction for preparing chlorine by catalytic oxidation of HCl and has relatively high catalytic activity.

The invention belongs to the technical field of artificial board manufacturing, and particularly relates to a formaldehyde-free adhesive as well as a preparation method and application thereof, raw materials for preparing the formaldehyde-free adhesive comprise a flowable agent and a filling agent, and the formaldehyde-free adhesive is obtained by combining the raw materials through molecular acting force among the raw materials. The formaldehyde-free adhesive has the advantages of being high in bonding strength, stable in physical and chemical properties and not prone to deterioration, epoxy groups and carboxyl or anhydride groups in the formaldehyde-free adhesive can be directly reacted and coupled with groups on the surfaces of biomass fibers, the surface polarity of the formaldehyde-free adhesive after curing is large, the acting force between the formaldehyde-free adhesive and the biomass fibers is strong, and the formaldehyde-free adhesive is not prone to deterioration. The formaldehyde-free adhesive is high in strength after being cured; in addition, the formaldehyde-free adhesive subjected to complete curing reaction still has reversibility, the formaldehyde-free adhesive can be re-melted after being heated again, leftover materials generated by cutting in the later period of plate making can be subjected to hot pressing plate making without adding glue, secondary utilization of artificial plate waste is facilitated, resources are saved, and the environment is protected.

The invention relates to the technical field of organic silicon resin preparation, in particular to trapezoidal methyl silicon resin and a preparation method thereof.The trapezoidal methyl silicon resin is prepared by taking methyl trichlorosilane as a main raw material, introducing a trapezoidal control agent containing amido and alkoxy at the same time to inhibit the reaction activity of the methyl trichlorosilane and then carrying out hydrolysis reaction in a small amount of alcohol solvent and water; the generation of a cross-linked network structure insoluble substance during hydrolysis is avoided, and the resin gelation risk is effectively reduced. The hydrolysis rate is reduced, so that the use amount of the solvent is reduced, the proportion of alcohol in the water phase is greatly reduced, and the process and environmental protection cost is reduced. The trapezoidal methyl silicone resin prepared by the method is excellent in viscosity performance, high in yield, excellent in boiling resistance, short in curing time, high in resin softening point and short in gelation time.

The invention provides a resin composition, and a prepreg, a laminated board and a metal foil-clad laminated board containing the same. The resin composition comprises the following components in parts by mass: 20-90 parts of a component A and 5-60 parts of a component B, the component A comprises addition reactants of a maleimide compound a1 containing at least two N-substituted maleimide groups in one molecule and an amine compound a2 containing at least two primary amino groups in one molecule; and the component B is benzocyclobutene resin. Through design and mutual compounding of the component A and the component B, the problem of phase splitting caused by insufficient compatibility of a maleimide compound and low-polarity resin is solved, and the warping degree of a laminated board and a metal foil-clad laminated board at room temperature and after reflow soldering is further reduced; the resin composition and the laminated board and the metal foil-clad laminated board comprising the same have excellent performances such as high glass transition temperature and low thermal expansion coefficient, and fully meet the performance requirements of high-speed packaging substrate materials.

The invention discloses an electrolyte and a lithium battery, and additives of the electrolyte comprise a compound as shown in a structural formula 1, a cyclic sulfate compound and a sultone compound, the proportions of the compound as shown in the structural formula 1, the cyclic sulfate compound and the sultone compound in the electrolyte are awt%, bwt% and cwt% respectively, 2.5 b-a is more than or equal to-0.5 and less than or equal to 4, and 2a + c is more than or equal to 5 and less than or equal to 8. In the design, the compound shown in the structural formula 1 can form stable interfacial films on the surfaces of the positive electrode and the negative electrode, oxidative decomposition of an electrolyte at high temperature is reduced, consumption of the electrolyte is inhibited, the high-temperature cycle performance is improved, and the cyclic sulfate compound can reduce film-forming impedance and improve gram volume exertion; the sultone compound can improve the high-temperature storage performance. Therefore, the high-temperature cycle and high-temperature nesting performance of the lithium battery is effectively improved by adjusting the ratio of the compound shown in the structural formula 1, the cyclic sulfate compound and the sultone compound.

The invention relates to a whole-fraction flotation method for lepidolite ore containing mud, and belongs to the technical field of mineral processing. Aiming at the problems of serious lithium loss in a mud lepidolite ore desliming flotation process, poor indexes of a non-desliming flotation process and the like, a compound regulator, a compound inhibitor and a compound collector are added to carry out multi-dimensional regulation and control on the whole process of ore grinding, size mixing and collecting, so that the whole-size-fraction flotation recovery of the mud lepidolite ore is realized. The compound regulator is used for optimizing the composition of the ore grinding size fraction and reducing further argillization of the ore; the compound inhibitor is used for being selectively adsorbed to the surface of gangue minerals, and the hydrophobization effect of the collecting agent on the surface of the gangue minerals is hindered. The compound collecting agent is used for improving the separation difference between lepidolite and gangue minerals, and efficient enrichment of lepidolite is achieved. According to the method, a conventional flotation process does not need to be changed, the worsening influence of slime on the flotation process can be solved only through the synergistic effect of flotation reagents, and the flotation index of lepidolite ore is remarkably improved under the condition that slime is not removed.

The invention discloses an aromatic amine epoxy resin curing agent, a design method thereof, insulating epoxy resin and a preparation method thereof, and belongs to the technical field of insulation. At least two benzene ring structures are designed, and the benzene ring structures are connected through functional bridge bonds; an amino functional group is arranged at each of two ends of the designed structure; the ortho-position of the designed amino functional group is not provided with a high-electron-withdrawing substituent group; the aromatic amine epoxy resin curing agent is obtained; and the functional bridge bond is arranged at a 1, 4 or 1, 3 substitution position of the benzene ring structure. Polyaromatic diamine is used as a curing agent component of the epoxy resin, and a rigid aromatic structure is introduced into an epoxy main chain to enhance the thermal stability of the epoxy main chain and increase the glass-transition temperature; functional bridge bonds are introduced between benzene rings to break the conjugated structure of the benzene rings, so that the electrical performance is improved. And the high-temperature-stability and high-resistance insulating epoxy resin for the high-voltage direct current can be prepared. And the electrical performance of a key insulating part in the direct-current GIS / GIL under the action of a high temperature gradient and a high electric field can be improved.

The invention relates to the field of batteries, in particular to an electrolyte and an electrochemical device. The electrolyte comprises an organic solvent, an electrolyte and an electrolyte additive, and the electrolyte additive comprises a nitrile additive A and a nitrile additive B; the nitrile additive A comprises at least one of acetonitrile or butanedinitrile; the nitrile additive B comprises at least one of compounds shown as a formula I, # imgabs0, and R1 and R2 are independently and optionally selected from hydrogen, a straight chain or branched chain cyano group with the carbon atom number of 1-10, a straight chain or branched chain alkoxy group with the carbon atom number of 1-10, and a straight chain or branched chain halogenated hydrocarbon with the carbon atom number of 1-5. By combining the nitrile additive A and the nitrile additive B, the high-temperature storage performance and the cycle performance of the battery can be effectively improved at the same time.

The invention belongs to the technical field of batteries, and discloses a high-nickel oxide positive electrode material with a two-phase symbiotic structure and a preparation method, the unique two-phase symbiotic structure can effectively inhibit the violent change of the unit cell volume in the charging and discharging process, and the mechanical stability of the material is improved; a spinel structure is controllably constructed in advance, so that the reaction activity of the material can be effectively reduced, and the thermodynamic stability is improved, thereby inhibiting uncontrollable interface side reaction, oxygen release and irreversible phase change; due to the nanocrystallized particle morphology, faster lithium ion transmission can be realized, and the rate capability of the material is improved; the one-step spray pyrolysis method has the advantages of simple process, rapid reaction, no need of complex steps of coprecipitation, filtration, washing, crushing, calcination and the like, no generation of wastewater, great improvement of the production efficiency and reduction of the cost.

The invention discloses a cement-free Al2O3-SiC-C refractory castable and a use method of the cement-free Al2O3-SiC-C refractory castable. The invention relates to the technical field of refractory castable. The refractory castable is composed of aggregate, a matrix material and a water reducing agent. The aggregate is corundum particles and silicon carbide particles. The matrix material comprises corundum fine powder, alpha-Al2O3 micro powder, silicon micro powder, silicon carbide fine powder, ball pitch and various metal microcapsules. The use method of the refractory castable comprises the following steps: uniformly mixing the water reducing agent and the matrix material to obtain a premixed matrix material; uniformly stirring the aggregate and the premixed matrix material, adding water, and stirring to obtain slurry; pouring the slurry into a mold, and performing vibration molding and maintenance. The refractory castable disclosed by the invention is high in normal-temperature strength, excellent in medium-temperature and high-temperature mechanical properties, good in erosion resistance and thermal shock resistance, long in service life, energy-saving and environment-friendly; and in the using process, water adding amount is small, fluidity is good, production is stable, and the agent is suitable for molten iron grooves, ladle working layers and other parts.

The invention belongs to the field of batteries, and particularly relates to a phosphoryl isocyanate additive, a preparation method of the phosphoryl isocyanate additive, an electrolyte, the additive and a lithium ion battery. The structure of the phosphoryl isocyanate additive is shown as the following formula (A): # imgabs0 #, R1 is one of alkyl, alkoxy, phenoxyl, alkenyl, alkynyl, phenyl and substitutes thereof with the carbon atom number of 1-6, and R2 is one of isocyanate, alkyl, alkenyl, alkynyl, phenyl and substitutes thereof with the carbon atom number of 1-6. By adding a small amount of phosphoryl isocyanate additive into the electrolyte, a CEI structure which is relatively low in resistance and stable under a high-voltage condition is formed on the surface of a positive electrode, so that the rate capability and the high-voltage cycle stability of the battery can be improved.

The invention relates to a positive pole piece and a preparation method thereof, and a secondary battery comprising the positive pole piece. The positive pole piece comprises a positive current collector; the positive electrode material layer is arranged on the surface of the positive electrode current collector, the positive electrode material layer comprises a positive electrode active material and a functional polymer shown in the formula (1) # imgabs0 #, and n is equal to 10-10000. The functional polymer captures active oxygen released from the positive electrode under a high-temperature condition, so that the reaction activity of the full-electricity positive electrode and the electrolyte is reduced, the heat release power and heat release amount of the full-electricity positive electrode material and the electrolyte are greatly reduced, and the safety of the battery is improved.

The invention relates to an epoxy filler and a preparation method thereof, in particular to a low-heat-release high-compression-resistance light epoxy filler capable of being rapidly cured at room temperature and a preparation method of the low-heat-release high-compression-resistance light epoxy filler. The invention aims to solve the problems of large heat release amount, high heat release temperature, low curing speed and insufficient room-temperature curing in the curing process of the existing room-temperature rapid curing type oxygen filler. The invention discloses a low-heat-release high-compression-resistance light epoxy filler capable of being rapidly cured at room temperature. The low-heat-release high-compression-resistance light epoxy filler consists of a component A and a component B The component A is prepared from main body epoxy resin, low-activity epoxy resin, high-hydroxyl novolac epoxy resin, a flexibilizer, a diluent and modified hollow glass microspheres; and the component B is prepared from a low-speed curing agent and a curing accelerator. The filler prepared by the invention can gel in 20-40 minutes, the highest exothermic temperature does not exceed 100 DEG C during room-temperature curing, the density is lower than 0.7 g / cm < 3 > after curing, the room-temperature curing performance and the heating curing performance are equivalent, and the compression strength is greater than 54 MPa.

This application relates to the field of hydrosilylation, and in particular to a highly efficient catalyst for hydrosilylation reactions and its preparation method. This application provides a method for preparing a microcapsule-form catalyst, which first modifies methyl-terminated hydroxyl silicone oil with silazane, and then forms a microcapsule coating system with paraffin, thereby improving the release performance of the microcapsule coating system, so that the catalyst has low reactivity in the early stage of release, thereby improving the uniformity of the reaction process inside the silicone rubber, and thus improving the transparency and overall strength of the silicone rubber.

The utility model discloses a multifunctional restraining glove which comprises a glove body, a restraining belt, a grip ball and a tightening device, the glove body is integrally connected with finger separating sleeves of four fingers, a hole is formed in the position, corresponding to the ring finger, of the glove body, the end of each finger separating sleeve is open, and a groove is formed in the position, corresponding to the hand back, of the glove body. A grip ball is sewn and connected to the position, corresponding to the palm center, of the glove body, and an elastic rope is sewn between the side, facing the grip ball, of each finger separating sleeve and the grip ball. A finger ring is fixedly arranged at the end of each finger separating sleeve in a sleeved mode, a guide pipe is fixed to the bottom of the grip ball, four pulling ropes with different lengths penetrate through the guide pipe, one end of each pulling rope is fixed to one finger ring, the other ends of the four pulling ropes are movably fixed to a tightening device, and the tightening device is fixed to a binding belt. The glove has the advantages that the elastic rope of the glove body limits the moving space from fingers to the grip ball, so that the fingers are prevented from moving randomly while moving and exercising of the fingers are facilitated, and an infusion tube is prevented from being struggled off.

This invention discloses an acid and alkali resistant polyamide membrane and its preparation method. The method is as follows: S1: Immerse the ultrafiltration base membrane in an aqueous sodium hydroxide solution for soaking and then set aside; S2: Treat the base membrane with a mixed aqueous solution of polyamine and aziridine crosslinking agent; S3: Wet the base membrane in an organic phase solution of polyacrylamide monomer to obtain a polyamide composite membrane; S4: Immerse the prepared polyamide composite membrane in an alcoholic solution of hydroxymethyl crosslinking agent, then dry it in a forced-air drying oven, and after washing with water, obtain the acid and alkali resistant polyamide membrane. This application uses two crosslinking agents, aziridine and hydroxymethyl, which can undergo specific crosslinking reactions with the carboxyl groups inside the polyamide membrane, to directly perform dual crosslinking modification on the membrane interior and surface, without introducing other polymer materials to avoid excessive increase in membrane permeation resistance. The polyamide membrane prepared by this method has both good acid and alkali resistance and water permeability.

The present application discloses a promoter and a conductive auxiliary agent for use in preparing a low-temperature conductive copper paste and a low-temperature conductive copper paste, wherein the promoter is a monosubstituted urea or a disubstituted urea containing a bifunctional group, and the conductive auxiliary agent is an imidazole sulfonate, an imidazole phosphate or an imidazole acetate. The promoter is used in the low-temperature conductive copper paste to promote the reaction of the polymer resin and the low-activity curing agent in the copper paste, thereby reducing the curing temperature of the copper paste, so that the low-temperature conductive copper paste can be cured at low temperatures, and has good storage stability and low contact resistance. The conductive auxiliary agent used in the present application is used in the low-temperature conductive copper paste, and will produce a good conductive channel with ITO and TCO, thereby greatly reducing the contact resistance.

The invention relates to a siloxane-based amide secondary amine chain extender as well as a preparation method and application thereof, and the siloxane-based amide secondary amine chain extender disclosed by the invention can be used together with isocyanate and biodegradable polyester polyol to prepare degradable polyurethane related products. Due to the special design of the structure of the chain extender, the chain extender can be used as a slow-release latent curing agent. The excellent post-curing effect can be realized while the sufficient operability of the system is ensured, and the forming effect and the mechanical property of the single-component polyurethane product are improved. Meanwhile, degradable groups are contained in the product, so that degradation reaction can be carried out as a system hard segment in the degradation reaction process of the product. The degradation degree of the product is obviously improved. The product can be applied to the fields of polyurethane composite materials, coatings, adhesives and the like.

This invention discloses a method for microwave-catalyzed dehydrogenation of naphtha to produce aromatics, specifically comprising the following steps: Step 1, oxidizing and etching the surfaces of four different diameter carbon fibers to obtain four modified carbon fibers; Step 2, preparing four platinum-carbon fibers of different diameters based on the four modified carbon fibers obtained in Step 1; Step 3, preparing a gradient-pore structured platinum-carbon fiber paper based on the four different diameter platinum-carbon fibers obtained in Step 2; Step 4, using the gradient-pore structured platinum-carbon fiber paper obtained in Step 3 to catalyze the dehydrogenation of naphtha to obtain aromatics. This invention uses microwave-assisted catalysis to lower the reaction temperature, achieving localized catalytic heating to reduce side reactions, and also achieves high dehydrogenation efficiency.

The invention relates to the field of hydrosilylation, in particular to a high-efficiency catalyst for hydrosilylation and a preparation method thereof, and provides a preparation method of a microcapsule type catalyst, methyl-terminated hydroxyl silicone oil is modified by silazane, and then a microcapsule coating system is formed by the modified methyl-terminated hydroxyl silicone oil and paraffin. The release performance of a microcapsule coating system is improved, so that the catalyst has relatively low reaction activity at the initial release stage, the uniformity of the reaction process in the silicone rubber is improved, and the transparency and the overall strength of the silicone rubber are further improved.

The invention discloses a bio-based foaming material and a preparation method thereof, and relates to the technical field of foaming materials. When the bio-based foaming material is prepared, (1, 3, 3-trimethyl-2-methylene-2, 3-dihydro-1H-indole-6-yl)-methanol and 3-allyl salicylaldehyde are subjected to a reaction, and a spiropyran ultraviolet absorbent is prepared; the preparation method comprises the following steps: reacting a spiropyrane ultraviolet absorbent with an ethylene-vinyl acetate copolymer to prepare a modified ethylene-vinyl acetate copolymer; the preparation method comprises the following steps: carrying out polymerization growth on pre-modified nano silicon dioxide by using 1, 3-diaminoguanidine hydrochloride and 2, 4-diamino-6-[3-(trifluoromethyl) phenyl]-1, 3, 5-triazine to prepare modified nano silicon dioxide; the modified ethylene-vinyl acetate copolymer, the styrene-butadiene block copolymer, the modified nano silicon dioxide and phytic acid are mixed, granulated and subjected to supercritical foaming, and the bio-based foaming material is prepared. The bio-based foaming material prepared by the invention has excellent anti-aging, flame-retardant, antibacterial and wear-resistant properties.