87 results about "Stannous octoate" patented technology

The present invention relates to the technical field of coatings and discloses a method for preparing an EVA waterproof coating. Activated montmorillonite reacts with toluene diisocyanate to obtain isocyanate-modified montmorillonite. EVA is hydrolyzed under the catalysis of potassium hydroxide to obtain hydroxylated EVA. An epoxy trisiloxane intermediate reacts with terephthalic acid under ring-opening esterification with benzyltriethylammonium chloride to obtain p-hydroxytrisiloxane benzoate. P-hydroxytrisiloxane benzoate, hydroxylated EVA, and isocyanate-modified montmorillonite are cross-linked with toluene diisocyanate under the catalysis of stannous octoate, and a defoamer and a dispersant are added thereto and stirred uniformly to obtain an EVA waterproof coating. The EVA waterproof coating prepared by the present invention has good mechanical properties and waterproof properties.

The invention relates to the technical field of polymer degradable materials, in particular to a biodegradable material as well as a preparation method and application thereof. The material takes modified polylactic acid as a main body, and an antioxidant, a plasticizer, a flame retardant and an inorganic filler are used as auxiliary materials in parts by weight. The method is characterized in that lactic acid and an epicatechin imidazole ammonium chloride polymer are polymerized under the catalysis of stannous octoate, and an epicatechin bioactive group is introduced into a polylactic acid main chain in a chemical bonding manner, so that the biodegradation rate, the mechanical property and the thermal stability of the material are remarkably improved. Bioactive substances and ionic groups in the material promote microbial degradation, and the material can be completely decomposed in a compost environment in a short time; meanwhile, the strength, the toughness and the high-temperature processability of the polylactic acid are effectively improved through molecular-level enhancement and an ionic cross-linking effect. The material can be widely applied to the fields of disposable tableware, food packaging films, degradable agricultural mulching films and the like.

The invention discloses a high-temperature-resistant organic silicon elastomer with high mechanical property as well as preparation and application thereof, and belongs to the technical field of functional materials. The high-temperature-resistant organic silicon elastomer with high mechanical property is prepared from the following raw materials: hydroxyl silicone oil, white carbon black nanoparticles, a silane monomer cross-linking agent, a silane coupling agent and stannous octoate, and the catalyst also comprises cage-shaped titanium oxygen cluster molecules. According to the invention, by simultaneously using the components, the composite high-temperature-resistant organic silicon elastomer material can be provided, the thermal collapse temperature of the material is almost 500 DEG C, and the composite high-temperature-resistant organic silicon elastomer material is good in thermal stability and mechanical tensile strength and wide in application prospect.

The invention belongs to the technical field of synthetic ester, and particularly relates to a preparation method of fatty acid pentaerythritol ester base oil, which comprises the following steps: carrying out esterification reaction on pentaerythritol and fatty acid in the presence of a catalyst and a color retention agent, and carrying out post-treatment to obtain the fatty acid pentaerythritol ester base oil, the catalyst comprises at least one of stannous octoate, stannous oxalate, stannous oxide, tetrabutyl titanate, isopropyl titanate and sodium hydrogen sulfate; the color retention agent comprises at least one of sodium hypophosphite, hypophosphorous acid, activated carbon and sodium sulfite. The color retention agent sodium hypophosphite is matched with the specific catalyst such as stannous oxalate, so that the petroleum color number of the produced fatty acid pentaerythritol ester base oil is smaller, and meanwhile, the esterification reaction time is shorter.

The invention relates to a method for efficiently synthesizing a lithium difluoro bis (oxalate) phosphate solid in a continuous flow reactor, and belongs to the field of environmental protection. The method comprises the following steps: firstly, feeding a lithium hexafluorophosphate solution and a lithium oxalate solution into a static mixing module of a continuous flow reactor for mixing; then entering a reaction module of the continuous flow reactor for reaction; after the reaction is finished, the material enters a separation module of a continuous flow reactor, and after membrane separation, crude lithium difluorobisoxalato phosphate is obtained through a modified ceramic membrane adsorbent; washing the crude lithium difluoro-bis (oxalate) phosphate with absolute ethyl alcohol, and performing vacuum drying to obtain a lithium difluoro-bis (oxalate) phosphate solid; the modified ceramic membrane adsorbent is prepared from an aluminum oxide-zirconium oxide composite ceramic membrane, DMF (Dimethyl Formamide), water, isocyanate 1-trimethoxysilyl methyl ester, 3, 5-dihydroxyphenylboronic acid and stannous octoate. The lithium difluoro-bis (oxalate) phosphate prepared by the method is high in purity and high in yield, and meets the requirements of high-end lithium batteries.

The invention discloses a high-resilience anti-fouling sponge material and a preparation method thereof, belongs to the technical field of preparation of anti-fouling sponges, and aims to solve the technical problem that the resilience and thermal aging resistance of anti-fouling sponges in the prior art need to be further improved. The preparation method specifically comprises the following steps: mixing polyethylene glycol, modified polysilanediol, flexible aerogel, a polyurethane foam stabilizer, deionized water and stannous octoate to obtain mixed alcohol; modified polysilanediol and flexible aerogel are introduced to construct a multi-scale collaborative network, the integrated design of structure enhancement and body pollution resistance of the polyurethane elastomer is achieved, and different from a traditional surface coating means, according to the scheme, pollution resistance and mechanical properties are embedded in a material system, so that the structural enhancement and body pollution resistance of the polyurethane elastomer are improved, and the structural enhancement and body pollution resistance of the polyurethane elastomer are improved. Long-term stability and complex working condition adaptability are both considered, and the flexible aerogel and the organic framework form a uniformly dispersed structure, and meanwhile, the framework is supported to improve toughness and rebound resilience.

The preparation method comprises the following steps: sequentially carrying out esterification reaction and polycondensation reaction on terephthalic acid, ethylene glycol, equol or a derivative thereof in the presence of the catalyst to generate the modified polyester, wherein the catalyst is prepared by enabling antimony trioxide, stannous octoate, tetrabutyl titanate and triphenyl phosphite to react in a solvent at the temperature of 100 DEG C or above; the modified polyester prepared by the method has relatively high intrinsic viscosity and fracture tensile strength, can meet the application requirements of special high polymer materials, and solves the problem that the application of semi-biomass PET copolyester in the field of special high polymer materials is limited in the prior art.

The invention provides an inorganic silicon hybrid polyurethane primer as well as a preparation method and application thereof, and belongs to the technical field of primer. The primer provided by the invention is prepared from the following raw materials: polyester polyol, polyether polyol, trimethylolpropane, hexamethylene diisocyanate, 3-(phenylamino) propyltrimethoxysilane, ethyl acetate, xylene, an antioxidant, a light stabilizer, stannous octoate and a catalyst. An isocyanate-terminated polyurethane prepolymer is selected as a base material, a silane hybrid structure is introduced, a Si-O-Si network is formed after silane is hydrolyzed, the Si-O-Si network and Ca < 2 + > in concrete form a coordinate bond, and meanwhile, an isocyanate group reacts with water to generate a urea bond to reinforce anchoring. According to the primer disclosed by the invention, through a chemical-physical synergistic effect, the technical problem of bonding failure of a floating dust hardened layer is systematically solved, and an innovative solution is provided for long-acting sealing of a concrete joint.

The application relates to the technical field of solar energy, in particular to a self-cleaning solar photovoltaic panel and a preparation process thereof. The application adds anhydrous ethanol, ammonia water, deionized water, methyl triethoxysilane, tetraethyl orthosilicate and octadecyl trimethoxysilane to prepare silica sol. Then, tetra(2-hydroxyethoxy)silane, polypropylene glycol, toluene diisocyanate, betulin, 3,4-diamino furazan, silica sol and a catalyst stannous octoate are added to prepare a polymer. Glass, ethylene-vinyl acetate copolymer, a cell piece and ethylene-vinyl acetate copolymer are sequentially laid in layers; the laminated assembly is assembled with a frame to obtain a solar photovoltaic panel. Finally, a coating is prepared by taking the polymer as a raw material, and the coating is coated on the solar photovoltaic panel to obtain a finished product. The finished product has good hydrophobicity and antibacterial property, and therefore has a wide application prospect.

This invention belongs to the field of biomedical polymer materials technology, and relates to a method for preparing an injectable thermosensitive composite hydrogel that promotes wound healing, and its application. Polyethylene glycol monomethyl ether is used as a macromolecular initiator, and stannous octoate is used as a catalyst to initiate the bulk polymerization of six-membered cyclic carbonate monomers and their derivatives. After polymerization, coupling is performed via hexamethylene diisocyanate to obtain an amphiphilic block polymer with hydrophilic ends and an oleophilic middle. The block polymer is then dissolved in PBS at low temperature, and a certain proportion of wound-healing nanoparticles are uniformly dispersed in the polymer aqueous solution to obtain the injectable thermosensitive composite hydrogel. This composite hydrogel is a viscous liquid at room temperature and has a viscosity of 34°C. o It rapidly gels in environments above °C, meaning that after injection into the body, it can gel quickly and release nanoparticles in situ to promote wound repair. It also possesses excellent wound-healing capabilities.

The invention belongs to the field of novel functional polymer materials, and discloses a preparation method of a selenium-containing polymer material capable of fixing metal ions, and the preparation method comprises the following steps: S1, adding PTMEG into a round-bottom reaction flask filled with inert gas, and placing the round-bottom reaction flask in an oil bath pan for melting; s2, MDI, dimethylglyoxime, DSe and anhydrous N, N-dimethylacetamide are sequentially added and fully mixed; s3, stannous octoate and CuCl2 are added at the same time; s4, keeping the temperature of the oil bath pan and continuously reacting; s5, after the reaction is finished, a polymer is precipitated out, and secondary cleaning is conducted through methyl alcohol. The preparation method has the advantages that oximido is introduced into a polyurethane molecular structure to fix metal ions, meanwhile, selenium is introduced in a covalent fixation mode, and through double-site introduction of the metal ions and the selenium, the molecular structure of the polyurethane is greatly improved; the NO catalytic release rate of the material can be regulated and controlled, so that the biocompatibility and applicability of the polymer material in a blood environment are improved, and the application scene is further widened.

The invention relates to a sludge / biomass mixed drying process, and belongs to the technical field of sludge treatment. Feeding the dewatered sludge, the biomass, the furfural modified diatomite, the isocyanatopropyltriethoxysilane and the stannous octoate into a double-shaft differential mixer, and uniformly mixing; discharging the mixed material from a discharge port of the double-shaft differential mixer, conveying the mixed material to a corrosion-resistant mesh belt conveyor, and uniformly spreading the material on a mesh belt to form a material layer; a hot air drying system is started, a hot air furnace generates low-temperature hot air, and the low-temperature hot air penetrates through a material layer from bottom to top for drying after being distributed through an air duct; wet and hot waste gas generated by drying firstly enters a condensation dehumidification device to remove moisture, then enters a heat recovery device to recover heat, and finally is discharged after being purified to reach the standard; the furfural modified diatomite is prepared from diatomite, absolute ethyl alcohol, furfural and hydrochloric acid; the moisture content of dried materials is low, and the materials are free of caking, uneven drying and the like.

The present invention relates to the field of chemical engineering, involving organotin, and specifically to a preparation method of a class of binuclear organotin compounds and their application in polyurethane flexible foams. First, a preparation method of binuclear organotin is provided. This method uses inexpensive reagents, has a simple formula, is easy to operate, and at the same time, is green, safe, highly efficient and environmentally friendly, and is suitable for industrial production. The organotin synthesized by this method contains two tin atoms in the molecule, and the polycyclic fragments in the molecule increase the rigidity and stability of the molecule, effectively enhancing its activity and catalytic efficiency. This organotin can be used in the production of polyurethane flexible foams, and the various indicators of the obtained polyurethane flexible foams are higher than those of the polyurethane flexible foams produced by ordinary stannous octoate.

The utility model discloses a filtering device for stannous octoate preparation, which comprises a shell mechanism, a filtering device and a centrifugal motor, the filtering device is arranged in the shell mechanism, the centrifugal motor is arranged in the shell mechanism, and a power rod is connected with the filtering device; the filtering device comprises an outer filtering shell, an inner isolating shell, spiral material driving strips, a liquid outlet, a triangular liquid guide pipe, a quick connector and a feeding pipe, the inner isolating shell is arranged in the outer filtering shell, at least one spiral material driving strip is connected between the outer filtering shell and the inner isolating shell, the triangular liquid guide pipe is connected to the lower side faces of the spiral material driving strips, and the quick connector is connected with the triangular liquid guide pipe. A plurality of liquid outlet holes are formed in one side, close to the outer filter shell, of the triangular liquid guide pipe; the filtering device for stannous octoate preparation is simple in structure, convenient and practical, the filtering distance is prolonged through the spiral material driving strip, and meanwhile, crystalline stannous octoate can be gradually driven out, so that the purpose of discharging while filtering is achieved.

The invention belongs to the field of thermal insulation materials, and particularly relates to a preparation method of an all-water-blown polyurethane thermal insulation material for an environment-friendly ultrathin freezer, which comprises the following steps: adding nickel nitrate hexahydrate, trimesic acid and polyvinylpyrrolidone into a mixed solvent of DMF (Dimethyl Formamide) and water, reacting under a vacuum condition, cleaning and drying to obtain the all-water-blown polyurethane thermal insulation material for the environment-friendly ultrathin freezer. The spherical nickel-based MOF material is obtained; calcining the obtained spherical nickel-based MOFs material in a nitrogen environment, and naturally cooling to obtain a spherical porous derived carbon material; mixing polyol, water, resin, triethanolamine and the obtained spherical porous derived carbon material, and performing ultrasonic dispersion to form a component A; stannous octoate and isocyanate are mixed to form a component B; and mixing the component A and the component B to obtain the target product. The environment is not polluted, the heat preservation performance is improved, meanwhile, the compression strength can be improved, and core burning and cracking are not likely to happen.

This invention discloses a bio-based toughening agent-modified isosorbide polycarbonate and its preparation method, belonging to the technical field of isosorbide polycarbonate. The method includes the following steps: synthesis of a star-shaped polyester toughening agent, synthesis of isosorbide-decanediol copolycarbonate, and reactive blending. The method for synthesizing the star-shaped polyester toughening agent involves vacuum drying pentaerythritol at 105-115°C for 0.8-1.2 hours, mixing the dried pentaerythritol with ε-caprolactone and stannous octoate under nitrogen protection, heating to 125-135°C, and stirring the reaction under nitrogen atmosphere for 10-14 hours. After the reaction, cooling to 38-42°C, adding dichloromethane to completely dissolve the product, and precipitating it with cold methanol, followed by drying to obtain the star-shaped polyester toughening agent. The modified isosorbide polycarbonate prepared by this invention exhibits high toughness while maintaining excellent transparency.

The application discloses a gel polymer electrolyte and a preparation method and application thereof. The gel polymer electrolyte comprises monomers, an initiator, a lithium salt and an organic solvent. The monomers are provided with ether oxygen functional groups and carbonyl functional groups capable of conducting Li+. The initiator is selected from one of tin triflate and stannous octoate. The total mass ratio of the initiator and the monomers is 0.1-10:90-99. The mass ratio of the organic solvent and the lithium salt is 2-5:1. The application can realize the stability of the material to lithium metal without using a free radical polymerization mode represented by azobisisobutyronitrile, and can solve the problems of chemical reactions caused by initiator products and side reactions of residual active monomers by adjusting the adding proportion among the monomers, the initiator, the lithium salt and the organic solvent.

The invention relates to a preparation method of an aluminum-doped lithium lanthanum zirconium oxide solid electrolyte, and belongs to the technical field of solid electrolyte materials. Adding lithium carbonate, lanthanum oxide, zirconium oxide, aluminum nitrate and absolute ethyl alcohol into a ball milling tank for ball milling, drying, adding the modified aluminum ion chelating agent, mixing, grinding, sieving, putting into an aluminum oxide crucible, and pre-sintering to obtain an LLZO precursor; grinding and sieving the LLZO precursor, adding a polyvinyl alcohol solution, mixing, and pressing into a wafer; and placing the wafer in an alumina crucible, and carrying out high-temperature sintering to obtain the lithium lanthanum zirconium oxide solid electrolyte doped with the aluminum element. The modified aluminum ion chelating agent is prepared from (11-mercaptoundecyl)-trimethyl ammonium bromide, methylbenzene, biphenyl-4, 4 '-dithiol, triethylamine, lanthanum nitrate and stannous octoate; the lithium lanthanum zirconium oxide solid electrolyte prepared by the invention has relatively high room-temperature ionic conductivity and excellent chemical stability and interface stability.

The invention discloses a quick-drying water-based spraying marking paint and a preparation method thereof, the paint comprises a hydroxy acrylic acid dispersion, microencapsulated stannous octoate, a tertiary amine promoter, epoxy silane modified nano SiO2, hollow glass beads, a pigment and an auxiliary agent, and the paint is prepared through a high-speed shearing dispersion technology. On the premise that the wear resistance and the luminosity of the coating are guaranteed, microencapsulated stannous octoate is applied to catalysis of an epoxy-hydroxyl reaction, crosslinking is achieved ingeniously through epoxy silane modified nanoparticles, the industrial problem that the crosslinking speed of the waterborne acrylic coating at the normal temperature is low is solved, and the waterborne acrylic coating is especially suitable for construction in the low-temperature environment. Excellent durability and environment-friendly performance are realized.

The invention belongs to the technical field of metal material preparation, and discloses a feed formula for a low-oxygen-content titanium alloy FGF (Fibroblast Growth Factor), which consists of 85-92% of titanium alloy powder and 8-15% of a multi-element binder system, the binder comprises a polylactic acid / polycaprolactone blending skeleton capable of being catalytically degraded, a wax component capable of being extracted at low temperature, a compound surfactant and a high-boiling-point plasticizer, and a supported stannous octoate catalyst is introduced. According to the invention, a multi-component binder system consisting of a catalytically degradable polymer skeleton, a wax component capable of being extracted at a low temperature, a compound surfactant and a high-boiling-point plasticizer is constructed, and a two-stage degreasing process is matched, so that the fundamental contradiction between the degreasing efficiency and the material purity in titanium alloy powder injection molding is successfully solved; and a feasible technical path is provided for large-scale manufacturing of high-reliability and high-purity titanium alloy complex components.

The invention provides a degradable plastic box material as well as a preparation method and application thereof, and belongs to the field of polyester degradable plastic compositions. The method comprises the following steps: carrying out ring-opening copolymerization reaction on a tension cyclic ester monomer, a [2] rotaxane structure monomer, an aliphatic polyester monomer and stannous octoate to obtain a polyester copolymer with a linear-cyclic alternating multi-block structure; and carrying out melt co-extrusion on the polyester copolymer, the cellulose nanocrystal, the plasticizer, the lubricant and the inorganic pigment to obtain the degradable plastic box polyester material. According to the degradable plastic box polyester material, the components of the degradable plastic box polyester material are reasonably designed, the core polyester copolymer is copolymerized into a linear-annular alternating structure through specific monomers, rigidity, toughness and damage resistance are considered, acetal bonds assist in controllable degradation, cellulose nanocrystals improve the tensile strength and deformation resistance of the material, all the components are complementary in function and synergistic in performance, and the degradable plastic box polyester material is prepared. Therefore, the mechanical property and the degradation property of the material are synchronously improved.

The invention relates to the technical field of photoresist etching agents, in particular to stripping liquid for a thick photoresist etching agent and a preparation method of the stripping liquid. The stripping liquid for the thick photoresist etchant comprises the following components in parts by mass: 30-40 parts of a solvent system, 20-30 parts of an active component, 3-7 parts of a modifier and 0.5-1 part of a stabilizer, and the stabilizer is hydroxyethyl cellulose; the active components comprise a cyclodextrin-stannous octoate compound and a polysilicate ferric solution, and the mass ratio of the polysilicate ferric solution to the cyclodextrin-stannous octoate compound is (3-5): 1. According to the stripping liquid for the thick optical impedance corrosion inhibitor and the preparation method, the problem that the thick optical impedance corrosion inhibitor is difficult to strip by common stripping liquid in related technologies is solved.

The invention discloses a method for preparing stannous octoate by sectional distillation, which comprises the following steps: adding isocaprylic acid, metallic tin, a catalyst and an antioxidant into a reaction container in proportion, heating to promote the reaction of the materials, and directly synthesizing a stannous octoate crude product; and carrying out two-stage reduced pressure distillation on the stannous octoate crude product, respectively distilling for 5-10 minutes under the conditions that the temperature is 60-70 DEG C and the pressure is 0.02-0.03 MPa, and then distilling for 15-20 minutes under the conditions that the temperature is 90-100 DEG C and the pressure is 0.06-0.08 MPa to obtain the stannous octoate product. The production process is simple, the utilization rate of raw materials such as metallic tin and isocaprylic acid is high, the production cost is low, the method is green and environment-friendly, the stannous octoate product is easy to separate, and the obtained stannous octoate product is good in quality.

This invention relates to the field of polymer degradable materials technology, specifically to a biodegradable material, its preparation method, and its applications. The material is based on modified polylactic acid (PLA), supplemented by antioxidants, plasticizers, flame retardants, and inorganic fillers in specific weight proportions. Its unique feature lies in the polymerization of lactic acid and epicatechin imidazole ammonium chloride polymer under stannous octoate catalysis, using chemical bonding to introduce the bioactive groups of epicatechin into the PLA backbone, significantly improving the material's biodegradation rate, mechanical properties, and thermal stability. The bioactive substances and ionic groups in this material promote microbial degradation, achieving complete decomposition in a composting environment within a short time. Simultaneously, through molecular-level reinforcement and ionic cross-linking effects, the strength, toughness, and high-temperature processing performance of PLA are effectively improved. This material can be widely used in disposable tableware, food packaging films, and biodegradable agricultural mulch films.

The invention belongs to the technical field of high polymer materials, and particularly relates to a rubber label containing an epoxy group agglomerated siloxane microsphere emulsion and a preparation method thereof.The preparation method comprises the steps that S1, sodium dodecyl sulfate, sodium bicarbonate and sodium dihydrogen phosphate serve as raw materials to prepare a water phase, modified silane, n-hexadecane and azodiisobutyronitrile serve as raw materials to prepare an oil phase, and the oil phase is prepared into an oil phase; carrying out emulsification treatment on the water phase and the oil phase to obtain a miniemulsion, and carrying out polymerization reaction on the miniemulsion to obtain an epoxy group-containing agglomerated siloxane microsphere emulsion; s2, polyol, isocyanate, a chain extender, 1, 4-butanediol and stannous octoate are used as raw materials to prepare a prepolymer; and S3, adding the epoxy group-containing agglomerated siloxane microsphere emulsion into the prepolymer for stirring reaction, and then pouring into a mold for molding to obtain the rubber label containing the epoxy group-containing agglomerated siloxane microsphere emulsion. The hardness and heat resistance of the material are effectively improved, and good flame retardant property is obtained.

This invention relates to the field of polylactic acid (PLA) materials technology, specifically disclosing a biodegradable PLA vacuum blood collection tube and its preparation process. The preparation process includes the following steps: S1: Take lactic acid, p-hydroxyphenylpropionic acid, polycaprolactone-polyethylene glycol carboxyl group, stannous octoate, p-toluenesulfonic acid monohydrate, and modified hydroxypropionic acid to prepare polycaprolactone-polyethylene glycol carboxyl-modified PLA; S2: Take lactic acid, p-hydroxyphenylpropionic acid, carboxymethyl chitosan, stannous octoate, p-toluenesulfonic acid monohydrate, and modified hydroxypropionic acid to prepare chitosan-modified PLA; S3: Mix polycaprolactone-polyethylene glycol carboxyl-modified PLA, chitosan-modified PLA, and PLA evenly and add them to an extruder, melt-blend, extrude, and granulate to obtain PLA masterbatch; S4: Use PLA masterbatch to prepare vacuum blood collection tubes; Immerse the vacuum blood collection tubes in an antibacterial and anti-wall-attachment treatment solution, remove, wash, and dry to obtain biodegradable PLA vacuum blood collection tubes.

The invention relates to the technical field of coatings, and discloses a preparation method of an EVA (Ethylene Vinyl Acetate) waterproof coating, which comprises the following steps: reacting activated montmorillonite with toluene diisocynate to obtain isocyanate modified montmorillonite; eVA is hydrolyzed under the catalysis of potassium hydroxide to obtain hydroxylated EVA; and reacting the epoxy trisiloxane intermediate with terephthalic acid under ring-opening esterification of benzyltriethylammonium chloride to obtain the p-hydroxytrisiloxane benzoate. 4-hydroxytrisiloxane benzoate, hydroxylated EVA and isocyanate modified montmorillonite are subjected to a cross-linking reaction with toluene diisocynate under the catalysis of stannous octoate, then a defoaming agent and a dispersing agent are added into the mixture, the mixture is stirred to be uniform, and the EVA waterproof coating is obtained. The EVA waterproof coating prepared by the preparation method disclosed by the invention has relatively good mechanical property and waterproof property.

The invention discloses a waterproof fiber composite board and a preparation method thereof, and belongs to the technical field of fiber composite boards. The preparation method comprises the following steps: mixing and stirring fir wood fibers, maleic anhydride, benzoyl peroxide and N, N-dimethylaniline for reaction to obtain pretreated wood fibers; the pretreated wood fibers and phenolic resin with the solid content being 50% are mixed to obtain a wood matrix material, modified pollen, modified lotus leaf wax, stannous octoate and modified aerogel are added, and the mixture is stirred and mixed to obtain functional slurry; and pouring the functional slurry into a mold, and carrying out hot pressing treatment to obtain the waterproof fiber composite board. Chemical bonding of the modified aerogel, the pretreated wood fiber and the modified pollen is achieved through an isocyanate group, and a continuous heat preservation network is constructed to achieve the heat preservation property; phenolic resin, modified pollen and modified lotus leaf wax form double waterproof barriers, so that the problem that hydrophobic components are easy to migrate is solved; all the components have a synergistic effect, so that the product has excellent water resistance, antibacterial property, thermal insulation property, mechanical property and thermal stability.

The invention relates to the technical field of elastic materials. The degradable elastic material is prepared from the following raw materials in parts by weight: 40 to 50 parts of bio-based polyether polyol, 20 to 30 parts of polylactic acid, 6 to 10 parts of bio-based polybutylene terephthalate, 6 to 10 parts of bio-based polycaprolactone triol, 4 to 6 parts of filler, 2 to 4 parts of citric acid, 2 to 4 parts of itaconic anhydride, 0.6 to 1 part of zinc stearate, 0.4 to 0.6 part of stannous octoate and 1 to 6 parts of 1, 3-pentanediol monoisobutyrate. And 2 parts of erucyl amide. According to the invention, bacteria can metabolize, breed and secrete hydrolase, the hydrolase is fixed in the filler in the subsequent freeze-drying treatment, and when the final material is in an environment rich in microorganisms, the preloaded hydrolase can be activated and slowly released to start a hydrolysis reaction in the material, so that the breakage of a polymer chain is greatly accelerated; the degradation efficiency of the kettle material made of the degradable elastic material is effectively improved.

The invention discloses a high-bearing-capacity slow-resilience sponge and a preparation method thereof. The sponge is prepared from the following raw materials in parts by weight: 100 parts of slow rebound polyether polyol, 5 to 15 parts of ternary deep eutectic solvent, 1 to 3 parts of diethanol amine, 1.5 to 2.5 parts of deionized water, 0.3 to 0.8 part of triethylene diamine solution, 0.2 to 0.7 part of stannous octoate, 1 to 2 parts of polysiloxane-polyether block copolymer and polyphenyl polymethylene polyisocyanate, wherein the index of the polyphenyl polymethylene polyisocyanate is 105 to 115. During preparation, the component A is mixed and defoamed at a low temperature of 15-18 DEG C, and is mixed and foamed with isocyanate. And when the core temperature is raised to 45-55 DEG C through foaming heat release, the ternary deep eutectic solvent is triggered to be dissociated by heating and participate in in-situ crosslinking. By utilizing the dissociation characteristic of the deep eutectic solvent at a specific temperature, a secondary hydrogen bond network is accessed to a main chain skeleton, and the cross-linked structure increases the interaction force between macromolecular chain segments and can disperse external compression stress, so that the support coefficient of the sponge is improved, the acting force and internal friction resistance between the macromolecular chain segments are increased, and the mechanical property of the sponge is improved. The synchronous improvement of the bearing capacity and the slow rebound characteristic of the sponge is realized.