713 results about "Polyurethane elastomer" patented technology

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-static-rigidity high-damping low-pressure-change polyurethane elastomer and a preparation method thereof. Comprising a polyol component and an isocyanate component, and the polyol component comprises polyol A, a chain extender, a stabilizer, a hydrolysis-resistant agent and a catalyst; the isocyanate component is prepared from isocyanate, polyhydric alcohol B and branched chain unit alcohol; the polyol A comprises amine ether polyol and polytetrahydrofuran ether polyol; the polyhydric alcohol B comprises bio-based hydrolysis-resistant polyhydric alcohol and polytetrahydrofuran ether polyhydric alcohol; the bio-based hydrolysis-resistant polyol is prepared by carrying out a reaction on sebacic acid, 1, 2-propylene glycol and 1, 4-butanediol; the branched-chain unit alcohol is prepared from tetrahydrofuran and isooctanol through a reaction. By introducing the bio-based hydrolysis-resistant polyhydric alcohol and branched chain monohydric alcohol, the damping effect is remarkably enhanced, and on this basis, through formula adjustment and raw material screening, the product toughness is greatly improved, the compression set is reduced, and the performance of the product in heavy haul railway application is effectively optimized.

The invention discloses an epoxy resin tack coat oil material suitable for a steel bridge deck, which constructs a multi-scale toughening composite system through the synergistic effect of an epoxy-terminated polyurethane elastomer toughening agent (molecular-scale chemical grafting) and a nano-scale elastomer filler (nano dispersion toughening), and solves the problem of rigidity-flexibility imbalance of the traditional epoxy tack coat oil. The material has the advantages of fast curing (surface drying at 25 DEG C is less than or equal to 4 hours), high toughness (the elongation at break is greater than or equal to 250%) and excellent weather resistance (the performance retention rate is greater than or equal to 85% after ultraviolet aging for 500 hours), and is suitable for interlayer interface bonding of steel bridge deck pit slot and crack repair. According to the preparation method, uniform dispersion and interface chemical bonding of the nanofiller are achieved through a segmented stirring process, the comprehensive performance of the material is remarkably improved, and the important engineering application value is achieved.

The invention relates to the technical field of photoelectric composite cables, in particular to a cold-resistant tensile photoelectric composite cable and a rapid laying method thereof, and the cable comprises a conductor part, an insulating layer, an optical fiber unit, a filling layer and an outer sheath which are coaxially arranged from inside to outside and are sequentially wrapped. The conductor part is formed by twisting a plurality of strands of copper wires, a carbon fiber reinforced core is arranged in the conductor part, and the insulating layer is made of EAA and PEBA blending modified materials and contains nano boron nitride particles; the optical fiber unit is of a PBT loose tube structure, a plurality of single-mode optical fibers and special ointment are arranged in the PBT loose tube structure, micro-nano protrusions are arranged on the inner wall of a loose tube, and the surface of each micro-nano protrusion is covered with a silicon dioxide antireflection film. The cable integrates the functions of cold resistance, stretch resistance, electric conduction, insulation, communication, heat dissipation and protection. The insulating layer adopts EAA and PEBA blending modified materials to be combined with nano boron nitride particles, so that the cold resistance and the insulativity are improved; and the polyurethane elastomer of the filling layer is compounded with the glass beads, so that the structural stability and the comprehensive performance are enhanced.

The present invention relates to the field of polyurethane materials and particularly to a temperature-induced color-changing vehicle film and a preparation method therefor. The method of the present invention comprises: firstly, using polyurethane to wrap vanadium dioxide powder to obtain color-changing microcapsules; then using 1,1,1,3,5,5,5-heptamethyltrisiloxane and 3-allyloxy-1,2-propanediol as raw materials to synthesize an organosilicon-modified diol, and enabling trimellitic anhydride to react with toluene diisocyanate to synthesize a dicarboximide compound; enabling the organosilicon-modified diol and the dicarboximide compound to undergo an esterification reaction and a polymerization reaction to obtain an organosilicon-modified imide polyester diol; then mixing the organosilicon-modified imide polyester diol with polytetrahydrofuran ether glycol 2000, and then enabling the mixture to react with toluene diisocyanate to obtain a polyurethane elastomer; and mixing the polyurethane elastomer, the color-changing microcapsules, a silane coupling agent, a plasticizer, an antioxidant, and an ultraviolet light absorber, followed by melt extrusion and blow molding into a film, so as to obtain the temperature-induced color-changing vehicle film.

The invention relates to the field of drag chain cables, in particular to a high-flexibility shielding type drag chain cable and a preparation method thereof. The drag chain cable sequentially comprises a conductor layer, a shielding layer and a sheath layer from inside to outside. The conductor layer is formed by compositely twisting silver-plated copper wires and carbon fibers; the shielding layer comprises an inner shielding layer and an outer shielding layer, the inner shielding layer is wrapped by an aluminum-plastic composite belt, and the outer shielding layer is a tinned copper wire woven mesh. The sheath layer comprises the following components: a modified polyurethane elastomer, an ethylene-vinyl acetate copolymer, nitrile rubber, a composite flame retardant, a plasticizer, an antioxidant, a light stabilizer and a lubricant. Through the structural design of the conductor layer, the shielding layer and the sheath layer and the optimization of the material formula of the sheath layer, the problems that an existing drag chain cable is insufficient in strength and flexibility, limited in shielding effectiveness, poor in wear resistance and weather resistance and difficult to consider both flame retardance and mechanical property are solved.

The invention provides a carbon dioxide based polycarbonate-polyester-polyether block copolymerized diol, a star-shaped carbon dioxide based polycarbonate-polyester-polyether copolymerized polyol, and a star-shaped carbon dioxide based polycarbonate-polyester-polyether copolymerized polyol with a low molecular weight. By adjusting the specific polyether content, chain segment distribution and molecular weight, the three polyols can be used for preparing polyurethane elastomers, soft foam and hard foam respectively. The low-temperature brittleness of the polyurethane material is improved while the elasticity of the polyurethane material is improved.

The invention discloses a preparation method and application of a reproducible self-healing polyurethane elastomer with synergism of dynamic silicon oxygen bonds and multiple hydrogen bonds. The method comprises the following steps: (1) carrying out a pre-polymerization chain extension reaction on polytetrahydrofuran, isophorone diisocyanate and a catalyst; (2) adding a 3, 13-dihydroxy propyl octaphenyl double-layer silsesquioxane monomer to carry out a chain extension reaction, and then adding carbohydrazide to carry out a reaction; and (3) adding glycerol and camphorsulfonic acid, uniformly stirring, pouring into a mold, curing and drying, thereby obtaining the reproducible self-healing polyurethane elastomer with synergistic dynamic silicon-oxygen bonds and multiple hydrogen bonds. According to the invention, a common fabric is soaked in a dispersion liquid formed by uniformly mixing diluted polyurethane and hydrophobically modified MXene to obtain the multifunctional composite material with the functions of self-cleaning, self-repairing, photo-thermal conversion and human body sensing.

The invention belongs to the technical field of polyurethane composite materials, and particularly discloses a preparation method of an aramid nanofiber / polyurethane composite material. The method comprises the following steps: (1) preparing an organic silicon modified polyurethane prepolymer; (2) preparing a fluorinated modified aramid nanofiber (FANF); and (3) uniformly dispersing FANF in a solvent to form a dispersion liquid, adding a chain extender into the organosilicon modified polyurethane prepolymer according to a preset chain extension coefficient, then doping the FANF dispersion liquid, and mixing, curing and molding to obtain the high-performance polyurethane elastomer (PUE). Through the synergistic effect of the rigidity enhancement effect of the aramid nanofibers and the interface lubrication characteristic of the polydimethylsiloxane, the wear resistance and mechanical strength of the material are remarkably improved, and the obtained PUE has excellent tensile strength (gt; 35 MPa) and an elongation at break (gt; 400%), and can be widely applied to the fields of industrial sealing, flexible electronics and high-load transmission parts.

The utility model discloses a steel core copper conductor stainless steel wire armored combination cable for a buggy ladle, which comprises three power wire cores and a control wire core, the three power wire cores and the control wire core are uniformly distributed at intervals of 90 degrees in the circumferential direction through an X-shaped polyurethane elastomer isolation core, a central hole is formed in the central part of the X-shaped polyurethane elastomer isolation core, and a galvanized steel wire reinforced core is sleeved in the central hole; and a polyether polyurethane inner sheath layer, a Kevlar fiber inner braid layer, a stainless steel wire armor layer, a Kevlar fiber outer braid layer and a polyether polyurethane outer sheath layer are sequentially coated outside the X-shaped polyurethane elastomer isolation core. The cable is better in flexibility and structural stability, the sheath is prevented from wrinkling, the cable is prevented from being twisted and deformed, the durability and the applicability are improved, and potential safety hazards are reduced.

The present invention relates to a method for preparing a thermosetting polyurethane elastomer for 3D printing, belonging to the field of rapid prototyping and manufacturing technology. This method utilizes a blocked isocyanate process to quantitatively control the reaction rate of a highly reactive polyurethane system, thereby obtaining a single-component thermosetting polyurethane elastomer stock solution. A polyurethane prepolymer is prepared using diisocyanate and oligomer polyol as raw materials. A blocked prepolymer is then prepared using an active hydrogen-containing blocking agent and a blocked prepolymer. A metered diamine chain extender and catalyst are then added to obtain a single-component thermosetting polyurethane elastomer stock solution. This method quantitatively controls the reaction rate of the highly reactive polyurethane system. The polyurethane elastomer stock solution is stable and low-toxic upon storage at room temperature. The raw material viscosity is adjusted by heating to meet the viscosity requirements for 3D printing, thereby achieving the green production of high-performance polyurethane elastomers.

The invention discloses a supramolecular polyurethane prepolymer, supramolecular polyurethane prepolymer ink, a supramolecular polyurethane elastomer as well as a preparation method and application of the supramolecular polyurethane prepolymer. The structural formula of the supramolecular polyurethane prepolymer is as follows: # imgabs0 #; wherein m is 5-35, n is 6-28, and R is 2-acetyl benzene, phenyl or biphenyl. The supramolecular polyurethane prepolymer has multiple strong hydrogen bonds formed by allophanate bonds and carbamate bonds, microphase separation of soft and hard segments of polyurethane is promoted, the tightness of chain segment spatial conformation is increased by utilizing a planar structure of boron atoms, hydrogen bonds between the carbamate bonds are enhanced, and the microphase separation of soft and hard segments of polyurethane is promoted. The tensile strength, the thermal stability and the toughness of a 3D printed product are improved by virtue of multi-reinforcement coupling due to the dynamic characteristics of the boric acid ester bond, and the 3D printed product has excellent bearing capacity.

The invention discloses a transparent polyurethane elastomer and a preparation method thereof, and relates to the technical field of polyurethane elastomers, the preparation method comprises the following steps: carrying out vacuum dehydration on polytetrahydrofuran ether glycol-2000 and polytetrahydrofuran ether glycol-1000 for later use; the preparation method comprises the following steps: preheating a reaction container, adding isophorone diisocyanate and benzoyl chloride, uniformly stirring, adding polytetrahydrofuran ether glycol-2000 and polytetrahydrofuran ether glycol-1000, and carrying out heat preservation reaction to obtain a polyurethane prepolymer; uniformly stirring polyether polyol N330, a chain extender, dibutyltin dilaurate, silicone oil, a defoaming agent, an antioxidant and an ultraviolet light absorber, carrying out vacuum degassing, adding into the polyurethane prepolymer, uniformly stirring, pouring into a mold, curing, molding and demolding to obtain the transparent polyurethane elastomer.

The invention relates to the field of high polymer material processing, in particular to an in-situ elastomer fiber toughened polylactic acid composite material and a preparation method thereof. The in-situ elastomer fiber toughened polylactic acid composite material provided by the invention comprises a polylactic acid matrix and elastomer fibers dispersed in the polylactic acid matrix, and the elastomer fibers are formed in the polylactic acid matrix in situ by a fiber forming phase; the fiber forming phase is a polyolefin elastomer, a polyurethane elastomer or a styrene elastomer; the polylactic acid matrix is formed by polylactic acid, and the mass ratio of the polylactic acid to the fiber forming phase is (80-100): (1-20). The elastomer added in the in-situ elastomer fiber toughened polylactic acid composite material prepared by the invention forms fibers in situ, so that the stress of a crack propagation tip is effectively absorbed, and the toughness of polylactic acid can be effectively improved under the condition of maintaining the strength and modulus of polylactic acid.

The present invention relates to the technical field of polyurethane synthesis, and specifically to a method for preparing a highly wear-resistant polyurethane elastomer, comprising the following steps: placing porous particles in an oily liquid of dibutyltin dilaurate, heating and stirring, filtering, dispersing the filtered porous particles, cooling and storing; stirring a hydroxyl-terminated polyurethane prepolymer, a diisocyanate, a chain extender, porous particles, a stabilizer, carbon black, and a coupling agent at low temperature, uniformly pouring the mixture into a mold, subjecting the mold to microwave treatment, placing the mold in a constant temperature chamber for reaction, and demolding the resulting product. The present invention solidifies the dibutyltin dilaurate catalyst in the porous particles, heats the porous particles during microwave treatment, causing them to melt and diffuse into the raw material mixture, and catalytic polymerization occurs under heating in the constant temperature chamber. The resulting polyurethane product exhibits significantly improved properties such as wear resistance, high temperature resistance, and impact resistance.

The invention relates to the field of polymer composite materials, and discloses a wear-resistant sports shoe outsole and a preparation method thereof.The outsole comprises a polyurethane elastomer matrix, ceramic nanoparticles are generated in situ in the matrix, and a dynamic reversible chemical bond cross-linked network is constructed; a gradient dynamic interface is formed between the ceramic nanoparticles and the polyurethane elastomer matrix through a bifunctional interface anchoring molecule; the polyurethane elastomer matrix is prepared by reaction of a polyalcohol component, a diisocyanate component, a first type of reaction monomer introduced with a dynamic reversible chemical bond functional group, a ceramic nanoparticle precursor, a bifunctional interface anchoring molecule, a chain extender component and the like. Through in-situ generation of a reinforced phase, construction of a dynamic reversible cross-linked network and formation of a unique molecular anchoring gradient dynamic interface between the reinforced phase and a matrix, the wear resistance, toughness, fatigue life resistance and durability of the sports shoe outsole material are synergistically improved.

The invention belongs to the technical field of polylactic acid elastomers. The invention provides a covalent self-adaptive network cross-linked toughened polylactic acid polyurethane elastomer. The polylactic acid polyurethane elastomer is a cross-linked polyurethane elastomer of which the soft segment is dihydroxyl-terminated polylactic acid dihydric alcohol and the hard segment is a dynamic covalent bond-containing cross-linked polyurethane elastomer. The invention also provides a preparation method of the covalent self-adaptive network cross-linked and toughened polylactic acid polyurethane elastomer. The invention also provides application of the polylactic acid polyurethane elastomer in the fields of degradable medical implants and flexible electronics. The dynamic bond toughened cross-linked polylactic acid polyurethane is prepared from a low-molecular-weight polylactic acid dihydric alcohol derivative through a cross-linked structure in a manner of introducing a dynamic covalent bond, and has the advantages of intrinsic elasticity, high elongation at break, high toughness, biocompatibility, excellent self-healing property and recoverability.

The invention discloses polycaprolactone dihydric alcohol containing maleimide groups and a preparation method and application thereof, and the preparation method of the polycaprolactone dihydric alcohol comprises the following steps: adding N-(2, 3-dihydroxy propyl) maleimide, caprolactone and a catalyst into a reaction container, carrying out high-temperature reaction for 12-18 hours, filtering, washing, and drying to obtain the polycaprolactone dihydric alcohol containing the maleimide groups. And cooling and discharging to obtain the polycaprolactone diol containing the maleimide group. The polycaprolactone diol containing the maleimide group is used as a raw material to prepare a polyurethane prepolymer, so that the side chain of the prepolymer is provided with the maleimide group, and then a difuran compound is introduced as a dynamic cross-linking agent to obtain the self-repairing polyurethane elastomer containing the Diels-Alder bond. Through the reversible Diels-Alder (D-A) reaction effect of the functional components, the polyurethane elastomer can be remodeled and recycled, and the polyurethane elastomer has excellent and stable mechanical properties, self-repairing efficiency and repeated self-repairing capability.

The invention discloses a wear-resistant stone-impact-resistant powder coating and a preparation method thereof, and belongs to the technical field of paints.The wear-resistant stone-impact-resistant powder coating has the advantages that epoxy resin, a polyurethane prepolymer mixture and a high-temperature-resistant and low-temperature-resistant elastomer modifier are compounded to form an epoxy-polyurethane-elastomer chemical bonding effect, and the wear-resistant stone-impact-resistant powder coating is excellent in compatibility and better in crosslinking density, flexibility and elasticity; the stone impact resistance is greater than or equal to 4B grade, and the problem of poor stone impact resistance of a powder coating in the prior art is effectively solved; the epoxy resin is compounded by bisphenol A epoxy resin and hydrogenated bisphenol A epoxy resin, and forms a coating system with a composite antirust system, a gradient wear-resistant filler (compounded by nano ZrO and emery powder), a composite antirust system and a composite flame retardant, and interacts with each other, so that the wear resistance, the impact resistance, the flame retardance and the corrosion resistance of the coating are further enhanced, and the service life of the coating is prolonged. And the coating is durable, so that the frequent maintenance or replacement requirement of the chassis is reduced, and the coating is also suitable for protecting high-value parts of the new energy automobile.

The invention discloses a compression-resistant and wear-resistant cable and a preparation method thereof, the compression-resistant and wear-resistant cable comprises a cable core, a wrapping layer and a sheath layer, the cable core is formed by twisting a plurality of wire cores, each wire core is composed of a conductor formed by twisting a plurality of tinned copper wires and an insulating layer wrapping the conductor, and fillers are arranged between the wire cores and the wrapping layer; the outer sheath layer is prepared from the following components in parts by weight: 100 parts of a polyurethane elastomer, 10-15 parts of a modified filler, 1-2 parts of a lubricant, 0.5-0.7 part of an antioxidant and 0.3-0.5 part of an ultraviolet light absorber. According to the pressure-resistant and wear-resistant cable, the modified filler prepared by a specific method is added into the outer sheath layer, and the interface bonding strength of the filler and a polyurethane matrix is greatly enhanced, so that the cable sheath layer is endowed with excellent tear strength, compression resistance and wear resistance, and the service life of the cable in a harsh industrial environment is remarkably prolonged.

The invention discloses a soft and light cable for ocean engineering, and belongs to the technical field of ocean engineering, a sheath adopts a double-layer polyurethane structure, modified aramid fibers are embedded between inner and outer layers of polyurethane to serve as a reinforcing layer, and the modified aramid fibers are formed by generating oxygen-containing polar groups on the surfaces of the aramid fibers through surface modification. The modified aramid fiber and the polyurethane form chemical bonding in the processing process, and the sheath is made of thermoplastic polyether polyurethane elastomer; the interface bonding strength between the sheath material and the modified aramid fiber woven material is high, different use environments can be better adapted, the inner and outer sheath structures are not easy to move, and the inner material is better protected. The sheath is made of polyurethane, and the polyurethane has high tensile strength, wear resistance and tear resistance and can bear mechanical stress and impact in the marine environment.

The invention discloses an antifouling and antibacterial thermoplastic polyurethane elastomer and a preparation method thereof, and belongs to the technical field of polyurethane elastomers. The elastomer is composed of polyol, diisocyanate, a composite antibacterial agent and polyethylene glycol, bio-based polyol in the polyol is prepared from castor oil through fluorination modification, anhydride reaction and sulfydryl esterification, and a fluoroalkyl side chain and an amphiphilic group introduced into a molecular structure endow a material body with antifouling performance. Stain adhesion and permeation can be inhibited without relying on a post-treatment coating; the composite antibacterial agent is formed by compounding zwitterionic quaternary ammonium salt, silver nitrate and tannic acid, and has multiple antibacterial mechanisms of electrostatic adsorption, metal ion slow release and biological membrane inhibition. The elastomer realizes excellent antifouling and antibacterial properties through the antifouling design of the bio-based polyol and the synergistic effect of the composite antibacterial agent, has the environmental protection advantage brought by the bio-based component, and is suitable for industrial production of easily polluted scenes such as medical treatment and sports equipment.

The invention belongs to the technical field of new energy materials, and particularly relates to a solid electrolyte material for a lithium battery and a preparation method thereof. The solid electrolyte material for the lithium battery is a polyurethane elastomer and consists of a polyether ion conduction soft segment and an isocyanate crosslinking hard segment, the soft segment is selected from polyether polyol and accounts for 66-90% of the total mass of the polyurethane elastomer; the hard segment is formed by reacting diisocyanate with a chain extender, and accounts for 10-34% of the total mass of the polyurethane elastomer; and the ether solvent is sealed in the soft segment phase by the polymer network. The polyurethane elastomer disclosed by the invention has high ionic conductivity, excellent mechanical property and good interface compatibility, and can be suitable for different types of lithium batteries, such as lithium ion batteries, lithium metal batteries, high-voltage lithium ion batteries and the like; and the preparation process is simple and suitable for large-scale industrial production.

The invention discloses a double dynamic bond self-repairing polyurethane elastomer as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The elastomer is prepared from the following raw materials in percentage by mass: 74 to 76 percent of polyether polyol, 15.5 to 18 percent of diisocyanate, 1.67 to 7 percent of dihydrazide compound and 2.1 to 6.7 percent of disulfide. The preparation method comprises the following steps: firstly, reacting polyether polyol with diisocyanate to obtain a prepolymer, then sequentially carrying out step-by-step chain extension reaction on the prepolymer, the bishydrazide compound and the disulfide compound, and finally, curing and forming. According to the invention, a synergistic structure of a hydrogen bond hard segment and a disulfide bond soft segment is constructed step by step, so that the material has high mechanical properties and efficient self-repairing capability. The elastomer is suitable for the fields of industrial pipeline sealing pieces, flexible packaging films, sports equipment accessories and the like, and solves the problem that the strength and repairing performance of an existing self-repairing polyurethane material are difficult to balance.

The invention provides a preparation method of a polyurethane MXene quantum dot self-repairing elastomer material. Wherein the polyurethane elastomer comprises a polyurethane elastomer matrix and MXene quantum dots distributed in the polyurethane elastomer matrix. The MXene quantum dots are introduced into the polyurethane elastomer, so that the tensile strength and the elongation at break of the polyurethane elastomer can be improved, and the mechanical property of the polyurethane elastomer is effectively improved; and the self-repairing efficiency can be obviously enhanced.

Disclosed in the present invention are a heat-insulating polyurethane multilayer film and a preparation method therefor. The preparation method comprises the following steps: uniformly mixing a polyester polyol and a polylactic acid polyol, then adding polyisocyanate, and heating and stirring the mixture to react to obtain a precursor; adding a chain extender and stirring the mixture to react to obtain a polyurethane elastomer solution; coating a PET release film with the polyurethane elastomer solution, and drying to obtain a first TPU base film and a second TPU base film; coating a surface of the first TPU base film with a coating layer containing a heat-insulating nanomaterial and then covering with the second TPU base film, followed by curing; forming a heat-insulating layer in the middle layer between the two base films; and peeling off the release film from the second TPU base film, coating the second TPU base film with a self-repairing protective coating layer, peeling off the release film from the first TPU base film, and coating a back surface of the first TPU base film with a pressure-sensitive adhesive layer, followed by baking and drying. The multilayer composite film obtained by the present invention has high transparency, and a good self-repairing function is realized by utilizing a polyurethane elastomer.

The invention relates to the technical field of polypropylene and discloses a high-strength impact-resistant modified polypropylene plastic and application thereof in durable toys. The high-strength impact-resistant modified polypropylene plastic comprises 100 parts by weight of polypropylene, 10-30 parts by weight of a hyperbranched polyurethane elastomer, 2-8 parts by weight of a filler, and 0.3-0.5 parts by weight of an antioxidant. The hyperbranched polyurethane elastomer contains a long alkyl chain having good compatibility with polypropylene. Simultaneously, during a high-temperature melt extrusion process, the long alkyl chain forms a physical chain entanglement with a polypropylene molecular chain, significantly improving the compatibility between the polyurethane elastomer and the polypropylene, increasing the interfacial force between the two, and enabling the hyperbranched polyurethane elastomer to have a better toughening effect, and significantly improving tensile properties, flexural strength, and impact strength.

The invention discloses a liquid metal acoustic sensing fiber and a preparation method thereof.The sensing fiber is of a skin-core structure and comprises a skin layer and a core layer, the skin layer comprises a polyurethane elastomer, and the core layer comprises a conductive composite layer composed of liquid metal, nano-silver, carbon nanotubes and the polyurethane elastomer; wherein the conductive particles are liquid metal, nano silver and carbon nanotubes. The skin-core structure acoustic sensing fiber is prepared through the liquid metal, nano-silver and carbon nanotube composite conductive material and a coaxial wet spinning process, the skin-core structure acoustic sensing fiber is excellent in conductivity, stretchable, good in acoustic response performance and sensitive to sound waves of different frequencies, the preparation process is simple, large-scale production is easy, the cost is low, and the material is resistant to electromagnetic interference and high in environmental adaptability.

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 invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-adhesion and high-moisture-permeability polyurethane microporous elastomer as well as a preparation method and application thereof. Comprising a component A and a component B, wherein the component A comprises 55-80 parts of polyester polyol P1; 20 to 45 parts of polyester polymer polyol P2; 5 to 10 parts of silane modified polyether polyol S1; 3 to 10 parts of a chain extender; 1-2 parts of a cross-linking agent; 0.3 to 0.6 part of a foam stabilizer; 0.5 to 0.8 part of a foaming agent; 1-2 parts of a catalyst; the component B comprises the following components in parts by weight: 10-20 parts of polyester polyol P1; 2 to 10 parts of silane modified polyether polyol S1; and 70 to 88 parts of isocyanate. The prepared polyurethane microporous elastomer not only has excellent bonding strength and stable processability (no bubble is generated), but also has remarkably improved moisture permeability, comfort, high elasticity and folding resistance when being used as a sole material.

The invention relates to a polyurethane-based composite solid polymer electrolyte film and a preparation method and application thereof, and belongs to the field of organic polymer solid electrolyte preparation. Polyethylene glycol-polypropylene glycol triblock copolymer and hydroxyl-terminated polybutadiene are used as soft segments, isophorone diisocyanate is used as a hard segment, and under the action of a catalyst, the polyurethane-based composite solid polymer electrolyte film is prepared. A chain extender containing disulfide bonds is utilized, and a polyurethane elastomer is prepared through gradual addition polymerization reaction; a polyurethane elastomer and a mixed solution of a lithium salt and a polyvinylidene fluoride-hexafluoropropylene copolymer are uniformly mixed, the polyurethane elastomer accounts for 10%-30% of the mass of the polyvinylidene fluoride-hexafluoropropylene copolymer, a precursor solution is obtained, the precursor solution is prepared into a film, and the polyurethane-based composite solid polymer electrolyte film is obtained. The polymer solid electrolyte membrane with excellent mechanical property and excellent lithium ion conductivity is constructed, and the development requirement of a high-performance lithium metal battery is met.