22918 results about "Polyurethane" patented technology

A method of manufacturing electrical tracks in a region of an intravascular blood pump is provided. The method can include providing an intravascular blood pump with a flow cannula including a spiral structure, a sensor and an electrical connection region, applying a conductor structure to a coatable material of the flow cannula, electrically connecting a first portion of the conductor track structure to the sensor and a second portion of the conductor track structure to the electrical connection region and closing the spiral structure using a flexible material where the flexible material can be silicone or polyurethane.

The invention relates to the technical field of detection, and discloses a polyurethane material performance detection method, which comprises the following steps: clamping a material to be detected on a loading platform, cooperatively controlling and simulating the stress effect of a target application scene, and capturing a time sequence image of the microstructure of the surface of the material by adopting a visual unit; synchronously acquiring internal strain distribution data through a distributed strain sensing array, acquiring a dynamic stress response spectrum in combination with a piezoelectric mechanical sensor, and generating a multi-modal deformation characteristic data set; performing crack density and texture orientation analysis on the time sequence image, extracting a crack growth rate and a direction consistency coefficient, and marking a strain concentration area; calculating an apparent elastic modulus attenuation rate based on the dynamic stress response spectrum, establishing a material performance degradation model, generating a dynamic flexible performance index through a weighted fusion algorithm, and performing graded evaluation on the material; material detection is upgraded from a single mechanical test to a multi-physics coupling intelligent evaluation system, and accurate and reliable detection support is provided for multiple application scenes.

The invention relates to the field of electric heating materials, and provides a graphene-based heating coating and a preparation method thereof. The coating is prepared from functionalized graphene, a surface modified bismuth telluride nanobelt, polyaniline, bisphenol A epoxy acrylate, polyurethane acrylate, a dispersing agent, a flatting agent, a silane coupling agent, a defoaming agent and a propylene glycol methyl ether acetate / N-methyl pyrrolidone mixed solvent. The functionalized graphene is obtained by modifying a hyperbranched polyolefin-acryloyl-POSS copolymer, and carrying out ultrasonic stripping, centrifugal separation, gradient washing and vacuum drying; the surface-modified bismuth telluride nanobelt is modified by an amino silane coupling agent, so that the interfacial compatibility is improved. The preparation method comprises the steps of solvent premixing, nanofiller dispersion, ultrasonic homogenization, coupling agent modification, ultraviolet curing and thermocuring. The heating coating provided by the invention has high conductivity, excellent thermal stability and adhesive force, and can be widely applied to heating electric appliances and intelligent temperature control equipment.

The invention discloses an OCA optical adhesive and a preparation method thereof, and relates to the technical field of adhesives, and the OCA optical adhesive is prepared from the following raw materials in parts by weight: 35-45 parts of acrylate-terminated hyperbranched organosilicon modified polyurethane, 2-4 parts of allyl succinimido carbonate, 1-3 parts of hexafluorobisphenol A diacrylate, 1-3 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1-3 parts of 1, 3-pentanediol monoisobutyrate, 1-3 parts of 1, 3-pentanediol monoisobutyrate, 1-3 parts of 1, 3-pentanediol The invention relates to a photocurable adhesive, which is prepared from the following components in parts by weight: 20 to 30 parts of a diluent, 0.6 to 1.2 parts of a photoinitiator, 0.5 to 1 part of an antioxidant and 0.5 to 1 part of a de-foaming agent. The photocurable adhesive is prepared from the following components in parts by weight: 1 to 5 parts of 1, 3-bis (oxiranyl methyl)-5-(2-propenyl)-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 5H)-triketone, 3 to 5 parts of 2, 2 '-bis (trifluoromethyl) diaminodiphenyl, 6 to 8 parts of other polymerizable monomers, 20 to 30 parts of the diluent, 0.6 to 1.2 parts of the photoinitiator, 0.5 to 1 part of the antioxidant and 0.5 to 1 part of the de-foaming agent. The OCA optical adhesive is good in bonding performance, sufficient in weather resistance and environmental protection performance and good in oil resistance.

The invention belongs to the technical field of electrical epoxy resin materials, and particularly relates to anti-aging electrical epoxy resin and a preparation method thereof. The epoxy resin is prepared from the following raw materials in parts by weight: 70 to 80 parts of epoxy resin, 3 to 5 parts of modified nano silicon dioxide, 1 to 3 parts of aminated graphene, 5 to 8 parts of polyurethane, 0.5 to 1 part of methyltriethoxysilane, 0.1 to 0.5 part of lauryl sodium sulfate, 0.5 to 1 part of antioxidant and 0.5 to 1 part of ultraviolet absorbent. Through silane modified nano silicon dioxide and aminated graphene, the anti-aging and corrosion-resistant performance of epoxy resin is improved, nano silicon dioxide enhances hardness and rigidity, aminated graphene improves toughness and heat conductivity, nano silicon dioxide and aminated graphene have a synergistic effect, multiple physical barriers are formed, permeation of aging factors and corrosive media is reduced, and the anti-aging and corrosion-resistant performance of epoxy resin is improved. And the surface is subjected to hydrophobic treatment by adopting methyl triethoxysilane, so that the weather resistance and the moisture resistance are further improved.

The invention belongs to the technical field of aerogel materials, and particularly relates to antistatic aerogel for 3D printing as well as a preparation method and application of the antistatic aerogel. The preparation method comprises the following steps: (1) dispersing inorganic nanoparticles modified by a silane coupling agent containing epoxy groups and an aniline monomer in an acidic solvent to obtain a monomer mixed solution; (2) stirring and dissolving polyamide in the monomer mixed solution; (3) initiating a reaction to obtain a polyaniline modified polyamide solution; and (4) freeze-drying to obtain the antistatic aerogel for 3D printing. By controlling synthesis conditions, a core-shell structure of acid-doped polyaniline coated inorganic nanoparticles is formed, and a good conductive path is formed in polyamide with a small addition amount of polyaniline. The antistatic aerogel for 3D printing can be applied to technologies such as photocuring molding and fused deposition of polyurethane resin in a 3D printing technology, and the antistatic property and the mechanical property of a 3D printed product are improved.

The invention relates to a self-cleaning nano coating material and a preparation process thereof, and belongs to the technical field of functional coatings. The coating material is prepared from nano silicon dioxide, nano aluminum oxide, graphene nanosheets, nitrogen-doped titanium dioxide, fluorinated silane, polyurethane, polydimethylsiloxane, a microcapsule repairing system, ethanol and deionized water according to a specific proportion through a multi-layer composite structure. The preparation process comprises the steps of base material surface pretreatment, reinforced particle surface modification, base material dissolution, functional additive introduction and multi-layer coating preparation. Through bottom layer enhancement, middle layer flexible buffering and surface layer functional design, excellent mechanical strength, wide-spectrum photocatalytic performance, self-repairing capacity and environmental adaptability are achieved. The problems that in the prior art, a self-cleaning coating is insufficient in mechanical performance, low in photocatalytic efficiency, lack of a self-repairing function and poor in weather resistance are solved, the service life of the coating is remarkably prolonged, and the functional stability of the coating is remarkably improved.

The invention belongs to the technical field of polymer preparation, and particularly relates to a curved-surface polyaniline modified 3D printing polyurethane material and application thereof. According to the preparation method, an ice crystal hard template method and a polyether glycol soft template method are combined, so that the microstructure of polyaniline is adjusted, and the curved polyaniline with regular morphology is prepared. The curved-surface arc-shaped structure has a large specific surface area, can form more contact sites with resin when being directly melt-blended with the resin, is beneficial to construction of a conductive path, and is not easy to agglomerate due to the curved-surface structure. The polyaniline with the arc-shaped structure is of a three-dimensional space structure and is directly blended with the resin to form a randomly arranged conductive network structure, so that the composite material is not easy to break when being impacted, and can be better embedded between the resin to form a stress transfer channel, and a complex three-dimensional network structure is constructed; the mechanical property and the antistatic capability of the product are improved.

The invention discloses high-toughness ultra-high performance concrete and a preparation method thereof, and relates to the technical field of polymer modified materials thereof. The concrete is composed of a cementitious material composite system, a fiber-reinforced system and a polymer modifier, the cementitious material comprises Portland cement, nano-silica, a rice hull ash-based auxiliary cementitious material and gradient grading quartz powder, and the fiber system adopts steel fiber / basalt fiber / polypropylene fiber multi-scale composite reinforcement. And a polyurethane emulsion interface modifier is matched. During preparation, a dry mixing-fiber dispersion-wet mixing three-stage process is combined with a microfluidization emulsification and segmented polymerization technology, so that uniform dispersion of fibers and matrix-fiber interface reinforcement are realized. The scheme has high strength, high toughness and industrial feasibility, and is suitable for harsh engineering scenes such as bridge joints and explosion-proof structures.

The invention relates to the field of sewage control, in particular to a nano zero-valent iron and zeolite molecular sieve synergistic composite material as well as a preparation method and application thereof. The nano zero-valent iron synergistic zeolite molecular sieve composite carrier (nZVI at Z-PU) is successfully prepared through an impregnation method, the preparation method is simple and controllable, and corresponding substances are introduced in the preparation process, so that the composite carrier has the structure and properties of being rough in surface, hydrophilic and carrying positive charges. Through modification, the ammonia nitrogen adsorption capacity of the nZVI-Z-PU is increased to 4-6.5 mg / g carrier, meanwhile, the initial adsorption capacity of the nZVI-Z-PU to microorganisms is remarkably improved and is 8.7 times that of a common polyurethane sponge carrier, and the initial adsorption capacity of the nZVI-Z-PU to the microorganisms is far superior to that of the common polyurethane sponge carrier. Therefore, after the zeolite molecular sieve and the nZVI are combined, the generation of NOB can be remarkably inhibited, and meanwhile, the activity of AnAOB is improved.

The invention belongs to the technical field of polyurethane sieve plate production, and particularly relates to a polyurethane sieve plate demolding mechanism and a demolding method.The polyurethane sieve plate demolding mechanism comprises a base, two supporting columns are fixedly connected to the right side of the upper end face of the base, a lower mold is fixedly connected to the upper end faces of the supporting columns, and a fixing plate is fixedly connected to the right side of the upper end face of the lower mold; an upper mold is fixedly connected to the lower end of the left side of the connecting plate, an injection molding pipe is arranged in the middle of the upper end of the upper mold, fourth sliding rods are slidably connected to the left end and the right end of the lower side of the lower mold correspondingly, a demolding plate is fixedly connected to the upper ends of the fourth sliding rods, and a jacking type tidy stacking mechanism used for placing the polyurethane sieve plates is arranged on the base. By means of the jacking type tidy stacking mechanism, polyurethane sieve plates ejected out of the die cavity can be transferred to the discharging plate, then the polyurethane sieve plates located on the discharging plate are stacked tidily, the process that the polyurethane sieve plates are taken away manually is omitted, and manpower is saved.

The invention relates to a photo-thermal super-hydrophobic multifunctional anti-icing coating as well as a preparation method and application thereof. The photo-thermal super-hydrophobic multifunctional anti-icing coating comprises primer and finish paint, the primer comprises the following raw materials in parts by weight: 20-25 parts of bisphenol A type epoxy resin and / or fluorine modified epoxy resin, 10-20 parts of fluorine modified polyacrylic resin and / or polyurethane resin, 5-10 parts of a curing agent and 40-55 parts of a solvent; the finish paint comprises the following components in parts by weight: 2-5 parts of polytetrafluoroethylene, 1-3 parts of soluble polytetrafluoroethylene, 1-5 parts of polydimethylsiloxane and 85-90 parts of fluorinated MOF dispersion liquid. Compared with the prior art, the photo-thermal super-hydrophobic multifunctional anti-icing coating provided by the invention has the characteristics of super-hydrophobicity, rapid ice melting, wear resistance, reduction of ice adhesion strength and reduction of icing amount, can effectively solve the problem of icing of an aluminum conductor of a power transmission line of a power system, and can be applied to power equipment such as the aluminum conductor of the power transmission line.

The invention discloses a polyurethane permeation grouting diffusion simulation method, device and equipment and a medium, and the method comprises the steps: building a geometric model of permeation grouting diffusion of polyurethane in a to-be-injected porous medium according to the physical attribute data of the to-be-injected porous medium; establishing a physical field of the geometric model by adopting a Richardz equation and a porous medium dilute material transfer equation, and adjusting the geometric model according to material attribute parameters of the geometric model obtained by the physical field; setting a boundary condition and an initial value of the adjusted geometric model, and performing grid division on the adjusted geometric model based on a local refinement method to obtain a permeation grouting diffusion simulation model; and solving the permeation grouting diffusion simulation model according to the transient solver, and completing simulation of permeation grouting diffusion of polyurethane in the porous medium. According to the method provided by the invention, the modeling accuracy of the slurry diffusion process is improved.

The invention relates to the technical field of multi-layer composite fabrics, and discloses a waterproof moisture-permeable composite fabric based on a bio-based material and a preparation method of the waterproof moisture-permeable composite fabric. The preparation method comprises the following steps: preparing an amino silanized zinc oxide / cellulose nanocrystal composite material, and carrying out mixed condensation polymerization on the amino silanized zinc oxide / cellulose nanocrystal composite material and vanillin cyclic carbonate to obtain an antibacterial agent; castor oil-based polyurethane, an antibacterial agent and a solvent are mixed and then subjected to electrostatic spinning, and after the electrostatic spinning and the pretreated polyester fabric are subjected to hot-pressing compounding, the obtained composite fabric has excellent waterproof and moisture permeable performance and good antibacterial performance.

The invention discloses a wear-resistant and high-temperature-resistant synchronous belt and a preparation method thereof. The wear-resistant and high-temperature-resistant synchronous belt comprises a synchronous belt framework and a synchronous belt rubber sheet, the synchronous belt rubber sheet is prepared from the following raw materials: a fluorosilicone thermoplastic polyurethane elastomer containing a benzene ring structure, an amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, epoxidized natural rubber, molybdenum sulfide nanosheets, reinforced fibers, bis (1-vinyl imidazole-2-) ketone, 2-acrylamido-2-methylpropanesulfonic acid, 4, 4 '-difluoro-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1 The high-temperature-resistant rubber is prepared from 2, 6-hydroxy-2-cyanobenzothiazole, bis (3-aminophenyl) 3, 5-bis (trifluoromethyl) phenylphosphine oxide, a catalyst, a coupling agent, a vulcanizing agent, an anti-aging agent, a scorch retarder and a lubricating agent. The synchronous belt is good in mechanical property, sufficient in high-temperature resistance and cold resistance, good in wear resistance and excellent in aging resistance and flame retardance.

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention discloses a wear-resistant high-strength composite polyurethane sieve plate and a preparation method thereof, and belongs to the technical field of polyurethane sieve plate processing.The preparation method comprises the following steps that modified polyurethane is added into xylene, the temperature of a reaction system is increased to 90-100 DEG C, stirring is conducted till the system is dissolved and clarified, and a polyurethane sieve plate is obtained; the preparation method comprises the following steps: adding olefin double bond modified aluminum oxide powder and a catalyst into a reaction system, taking composite polyurethane prepared from modified aluminum powder reinforced modified polyurethane as a polyurethane sieve plate base material, and carrying out reinforced crosslinking on the composite polyurethane by using o-cresol formaldehyde epoxy resin and modified nylon fiber; the strong acid and alkali corrosion resistance of the composite polyurethane sieve plate is effectively improved, and the service life of the composite polyurethane sieve plate is effectively prolonged.

The invention relates to a composite phase-change film based on liquid metal and PBO fiber and a preparation method thereof, and belongs to the technical field of phase-change material preparation, and the preparation method comprises the following steps: the composite phase-change film comprises a poly (p-phenylbenzobisoxazole) fiber (PBO) base material, a phase-change material and a heat-conducting filler, the phase-change material is composed of phase-change microcapsules (PM) which are prepared by taking polyurethane (PU) as a wall material and organic solid-liquid phase-change materials (OPCMs) as a core material through a Pickering emulsion polymerization method. The prepared PM has a core-shell structure, and leakage of OPCMs is effectively prevented. The PM and the PBO fiber network are combined, so that the dual packaging of the OPCMs is realized, and the leakage of the OPCMs is further prevented. Meanwhile, dispersion and interaction of the OPCMs in a PBO matrix are optimized, and formation of a network structure with a limited domain is promoted. The composite phase change film prepared by the invention has relatively high mechanical properties, remarkable heat conductivity, excellent and stable flexibility and excellent heat storage capacity.

The invention relates to the technical field of cold storage spraying, and discloses a cold storage spraying polyurethane real-time monitoring system based on temperature and humidity feedback, and the system comprises an environment collection module, a state analysis module, a parameter regulation and control module, a dynamic fusion module, a mode matching module and a feedback execution module. The environment acquisition module acquires temperature and humidity data and sets a monitoring interval; the state analysis module divides coating detection nodes and generates feature vectors; the parameter regulation and control module is used for separating influence factors, establishing control rules and acquiring process parameters; the dynamic fusion module identifies the equipment state, performs dynamic compensation and calculates the parameter difference degree; the mode matching module deduces an optimal curing threshold value and generates a deviation sequence; and the feedback execution module analyzes the deviation sequence and generates an adjustment instruction. The system realizes real-time monitoring and accurate regulation and control of the process of spraying polyurethane on the refrigeration house, improves the quality stability of the coating and the construction efficiency, is suitable for refrigeration house construction and maintenance scenes, and has the advantages of high environmental adaptability, accurate parameter regulation and control and the like.

The present invention pertains to the technical field of phase-change temperature-reducing materials, and in particular, relates to a phase-change temperature-reducing polyurethane composite material, and a preparation method and application thereof, comprising the following parts by mass of raw materials: 50-80 parts of polyurethane material A+polyurethane material B, 1-3 parts of flake graphite powder with a particle size of 850-1200 meshes, 0.8-1.8 parts of vermicular graphite with a particle size of 10-40 meshes, 10-30 parts of phase-change paraffin, 1-3 parts of activated carbon, 0.5-2 parts of catalyst, and 0.2-1 parts of co-catalyst. The polyurethane composite material made in the present invention is rapid in phase-change temperature reduction, high in heat absorption and dispersion, and free of problems of phase-change paraffin leakage, crystallization, and frosting on the surface thereof. At the same time, it also has softness and high elasticity, and can be widely applied to objects in contact with human bodies. A temperature difference is formed by reducing the temperature of the surface in contact with skin, which can bring a comfortable sense of coolness and a temperature-reducing effect to consumers.

The invention discloses a multifunctional aircraft skin bionic heterostructure and a preparation method thereof, belongs to the technical field of aerospace, and aims to solve the problem that a traditional aircraft skin structure is difficult to synergistically realize impact resistance, sound absorption, noise reduction and electromagnetic shielding, and a multifunctional composite skin protection structure is designed in a breakthrough manner. Through collaborative innovation of a bionic framework and a functional material, triple optimization of mechanical-acoustic-electromagnetic characteristics is realized. A bionic skeleton structure with outstanding mechanical properties is obtained through a layered annular structure of a glass sponge skeleton and a hierarchical structure design of a thighbone, and the bionic skeleton structure is combined with modified polyurethane foam with excellent sound absorption performance and electromagnetic shielding performance to obtain a multifunctional heterostructure with impact resistance, noise reduction and electromagnetic shielding.

The invention discloses a high-elasticity water-resistant flexible waterborne polyurethane elastic film product, and belongs to the field of waterborne polyurethane elastic film products. The waterborne polyurethane structure contains a strong supramolecular dynamic crosslinking unit and a polysiloxane unit, the strong supramolecular dynamic crosslinking unit has a metal-ligand effect and an optional multiple hydrogen bond effect, and the metal-ligand effect is preformed. In the polymerization process of the waterborne polyurethane, a preformed metal complex with a metal-ligand function serves as a weaving node, and the metal complex serves as a monomer and is cross-linked with a waterborne polyurethane chain segment. Due to the woven cross-linked interweaving structure, macromolecular chains connected to weaving nodes are spontaneously entangled. High polymer chain entanglement, reversibility of dynamic bonds and a cross-linked network endow the film with high strength, high elasticity, high flexibility and high density; meanwhile, the polysiloxane endows the film with water resistance and low viscosity. The waterborne polyurethane elastic film product prepared by adopting the structure is super-flexible, high in elasticity and good in water resistance.

The invention relates to the technical field of epoxy resin paint, and discloses waterborne epoxy paint suitable for containers and a preparation method of the waterborne epoxy paint. A component A of the waterborne epoxy paint comprises, by weight, 100 parts of waterborne epoxy resin and 0.5-0.8 part of a flash rust inhibitor; the component B comprises 6-8 parts by weight of a polyamide curing agent, 5-12 parts by weight of an organosilicon sulfonate polyurethane toughening agent and 0.2-1 part by weight of graphene oxide; the organic silicon polyurethane flexibilizer can play a role of a dispersing agent, the dispersity of graphene in the waterborne epoxy paint is improved, the main chain of the organic silicon polyurethane flexibilizer contains imino groups, the organic silicon polyurethane flexibilizer can be subjected to a curing reaction with epoxy resin, a flexible organic polysiloxane molecular chain is bonded into an epoxy resin molecular chain, and the flexibility of the waterborne epoxy paint is improved. A good toughening effect is achieved, so that the flexibility, the impact resistance and the corrosion resistance of a paint film are improved.

The invention relates to a steel energy-saving curtain wall structure, and belongs to the technical field of curtain walls. The steel energy-saving curtain wall structure comprises a steel square tube, an aluminum-plastic co-extrusion frame, a nylon composite polyurethane foaming heat insulation core, an aluminum-plastic co-extrusion plate, a curtain wall plate and a foaming plastic heat insulation plate, and the aluminum-plastic co-extrusion frame is fixedly connected to one end of the steel square tube; in the environment below zero, extrusion force of water on nitrogen is increased by freezing, the nitrogen extrudes and expands the box-shaped air bag, the box-shaped air bag is kept firm all the time, the probability that the box-shaped air bag is affected by thermal expansion and cold contraction is effectively reduced, the sealing effect between the curtain wall plate and the mounting frame is further improved, and the service life of the curtain wall plate is prolonged. The heat insulation performance of the whole curtain wall can be improved, the heat load loss of temperature difference heat transfer and the load intensity of solar radiation are effectively reduced, and the building energy efficiency is improved.

The invention provides a low-warpage underfill adhesive for FC-BGA packaging, a preparation method thereof and a flip chip. The underfill adhesive comprises the following components in percentage by mass: 50%-60% of silicon dioxide, 24%-29% of epoxy resin, 16%-20% of a curing agent, 0.1%-0.2% of carbon black and 0.1%-0.2% of an accelerant. Wherein the epoxy resin is composed of high-purity bisphenol A epoxy resin, polyurethane modified epoxy resin and phenolic aldehyde modified epoxy resin. By adjusting the proportion of the high-purity bisphenol A epoxy resin, the polyurethane modified epoxy resin and the phenolic aldehyde modified epoxy resin and combining the curing agent and the accelerant, the stress of the underfill adhesive is integrally reduced, and the underfill adhesive with good fluidity and low warpage is obtained; therefore, the packaging yield and the packaging efficiency of chip packaging are improved.

The invention relates to the technical field of silica gel cables, and discloses a silica gel cable with high reliability and high flexibility and a process thereof, and the silica gel cable comprises a conductor layer which is formed by hierarchically twisting a plurality of tinned copper wires with the diameter of 0.05-0.10 mm, and the twisting helical angle gradually changes from 25 degrees in the inner layer to 55 degrees in the outer layer; the insulating layer coats the conductor layer and comprises a silica gel material, a hydrogen-containing silicone oil cross-linking agent and a plasticizer, microcapsules with the particle size of 20-50 microns are dispersed in the silica gel material, a shell layer of each microcapsule is polyurethane, and a core layer of each microcapsule is a siloxane repairing agent containing a platinum catalyst; and a sheath layer. A hydrogen-containing silicone oil cross-linking agent in the insulating layer enables molecular chains to be cross-linked to form a net structure, the physical and chemical stability is enhanced, microcapsules are matched to endow a self-repairing function, a repairing agent is released when the cable is damaged, the self-repairing performance of the insulating layer is further guaranteed, damage is filled through a cross-linking reaction, insulation is recovered, the reliability of the cable is remarkably improved, and the service life of the cable is remarkably prolonged.

The invention relates to the field of adhesives, and particularly discloses an OCA optical adhesive for a folding screen and a preparation method of the OCA optical adhesive. The OCA optical adhesive for the folding screen is prepared from the following raw materials in parts by weight: 60 to 80 parts of urethane acrylate, 15 to 25 parts of organic silicon grafted glycidyl ether, 20 to 30 parts of a diluent, 5 to 10 parts of a photoinitiator and 1 to 2 parts of an antioxidant, the organic silicon grafted glycidyl ether is prepared by reacting vinyl siloxane, pentaerythritol triallyl ether, allyl glycidyl ether and a catalyst. The OCA optical cement for the folding screen prepared by the invention is applied to the folding screen, and can keep relatively good elasticity, bending resistance and bonding strength in the long-term repeated folding use process, and wrinkles and bubbles are not easy to appear.

According to the seawall ecological slope protection structure and the construction method thereof, the seawall ecological slope protection structure comprises a seawall body, the seawall body is filled with mud filling pipe bags, a wave wall is arranged at the top of the seawall body, a bagged gravel layer is laid on the slope surface of the seawall body, a polyurethane gravel protection slope is laid on the bagged gravel layer, and a wave dissipation platform is arranged on the slope surface; according to the seawall, the structural porosity of the seawall can be effectively improved, energy transportation and material exchange between the ocean and the land can be continued, meanwhile, the wave dissipation effect is good, and the structure is resistant to corrosion; the method is simple in form and high in universality, the construction step of cast-in-place concrete of a traditional seawall concrete slope protection structure is basically avoided, the site construction period and maintenance period are greatly shortened, the porosity of the polyurethane gravel slope protection is high, plant growth is facilitated, and the ecological property of the seawall structure is improved; and a good ecological effect can be created.

The invention relates to a polyurethane foam technology in the technical field of medical dressings, in particular to medical silver-containing porous polyurethane foam. The composite material comprises a foam matrix, the foam matrix adopts gradient layering design and comprises a matrix inner layer, a matrix middle layer and a matrix outer layer, the aperture of each layer is sequentially increased, the porosity is gradually increased layer by layer, the matrix inner layer is provided with randomly dispersed inner-layer hollow silver-loaded fibers capable of slowly releasing silver ions for bacteriostasis, the matrix middle layer is fixedly provided with pH response microcapsules, and the pH response microcapsules are fixed on the matrix outer layer. In an alkaline environment, antibacterial peptides are released for synergic antibiosis, and silver-loaded fibers in the outer layer of the matrix outer layer are arranged in the radial direction to form a flow guide channel and release silver ions. Through gradient layered design, different sterilization structures are added, the temperature-sensitive hydrogel layer covering the surface of the outer layer of the base body is matched, sterilization and seepage are managed through environmental changes, and the advantages of being excellent in antibacterial performance, high in seepage management capacity, intelligent in adjustment and the like are achieved.

The invention discloses a waterproof anticorrosive coating and a preparation method and application thereof, and relates to the technical field of coatings, and the waterproof anticorrosive coating is prepared from the following raw materials in parts by weight: 30-40 parts of carboxyl-terminated hyperbranched polyester resin, 20-30 parts of carboxyl-terminated functional polyamide, 10-15 parts of hyperbranched polyurethane containing epoxy groups, 15-20 parts of filler, 1-3 parts of (3, 6-diamino acridine-9-yl) boric acid, 1-3 parts of 1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- the component A is prepared from the following components in parts by weight: 3-5 parts of 2, 3, 5-triglycidyl-S-triazinetrione, 1-2 parts of a coupling agent, 0.8-1.2 parts of a flatting agent and 0.6-1.3 parts of a defoaming agent; the carboxyl-terminated functional polyamide comprises a structural unit introduced by the following monomers: N-(4H-1, 2, 4-triazole-4-yl) diphenylamine-4, 4 '-dicarboxylic acid, and 3, 3'-diamino-4, 4 '-difluorodiphenyl sulfone. The coating is good in waterproof and anti-corrosion performance, high in adhesive force with a base material, sufficient in solvent resistance and aging resistance and long in service life.