126results about How to "Good toughening effect" patented technology

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 discloses a high-toughness polyester heat shrinkage film not prone to brittle fracture and a preparation method thereof, and belongs to the technical field of polymer packaging materials. A specific formula of the polyester heat shrinkage film consists of pure polyethylene glycol terephthalate, dihydric alcohol modified polyethylene glycol terephthalate, polybutylene terephthalate, a toughening-crystallization nucleating complexing agent, a crystallization accelerant, an opening slipping agent and filler. According to the polyester heat shrinkage film obtained by the invention, the thickness is 31.1-51.6 microns, the tensile strength is TD193-202 MPa, the tensile strength is MD23-85 MPa, the elongation at break is TD26-52%, the elongation at break is MD52-46%, the shrinkage rate TD is 47-80%, the shrinkage rate is MD0-15%, the haze is 4.2-5.0%, the light transmittance is 86.5-87.4%, and the elongation at break is not greatly reduced after the polyester heat shrinkage film is placed in a normal-temperature and normal-humidity environment for 24 months and placed in a high-temperature and high-humidity environment for 18 days.

The invention relates to the field of aluminum alloy plates, and discloses a high-strength corrosion-resistant marine aluminum alloy plate and a processing technology thereof.The aluminum alloy plate comprises an aluminum alloy base material and a corrosion-resistant coating, and the aluminum alloy base material is prepared from, by weight, 0.4%-0.8% of Si, 0.5%-0.7% of Fe, 0.15%-0.4% of Cu, 0.1%-0.15% of Mn, 0.8%-1.2% of Mg, 0.04%-0.35% of Cr, 0.1%-0.25% of Zn, 0.05%-0.15% of Ti and the balance Al and inevitable impurities; the anticorrosive coating comprises the following raw materials in parts by weight: 40-65 parts of epoxy resin, 5-15 parts of a composite nano material, 3-7 parts of a modified curing agent, 1-5 parts of a curing agent, 1-3 parts of a wetting agent, 0.5-1 part of a defoaming agent, 0.1-1 part of a flatting agent and 0.1-0.5 part of a dispersing agent; the surface of the prepared aluminum alloy base material is coated with the anti-corrosion coating, the plate is subjected to subzero treatment after casting forming, and the composite nano material and the modified curing agent are added, so that the plate is endowed with excellent impact strength, corrosion resistance and flame retardance.

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The invention discloses a method for preparing oriented alumina fiber toughened ceramic by using supergravity, and relates to the technical field of high-performance ceramic. The alumina fiber provided by the invention can be used as a reinforcing phase and is directionally arranged in at least one spatial dimension in a zirconia ceramic matrix, and the invention also provides a preparation method of the alumina fiber reinforced zirconia ceramic, which comprises the following steps: firstly, preparing zirconia slurry added with the alumina fiber; then realizing directional arrangement of the alumina fibers in the zirconium oxide green body in a supergravity environment, and finally drying and sintering the zirconium oxide green body to obtain the alumina fiber reinforced zirconium oxide ceramic with directional arrangement. The alumina fiber reinforced zirconia ceramic prepared by the invention has excellent bending strength and fracture toughness, and the preparation method is simple, high in efficiency and suitable for large-scale production.

The invention relates to the technical field of power cables, and provides a high-flame-retardant power cable which comprises a conductor, an insulating layer, a shielding layer and an outer sheath layer. The insulating layer is arranged outside the conductor, the shielding layer is arranged outside the insulating layer, and the outer sheath layer is arranged outside the shielding layer; the conductor is an aluminum alloy conductor; the insulating layer is a crosslinked polyethylene insulating layer; the outer sheath layer comprises the following components in parts by mass: 60-70 parts of polyethylene, 10-20 parts of polypropylene, 10-20 parts of an ethylene-vinyl acetate copolymer and 40-50 parts of a flame retardant, and the flame retardant comprises the following raw materials: aluminum hydroxide, aluminum oxide and a hydroxy anthraquinone compound in a ratio of 10: 1: (0.05-1). According to the technical scheme, the problems of low mechanical property and poor flame retardance of the power cable in the prior art are solved.

The invention relates to the technical field of EVA (Ethylene Vinyl Acetate) hot melt adhesives, and discloses a hot melt adhesive, a preparation method thereof and an application of the hot melt adhesive in a card protecting film. The preparation method comprises the following steps: adding EVA resin, EVA-based polyurethane and an antioxidant into a reaction kettle, heating, stirring and melting, then adding a plasticizer, an auxiliary agent and a tackifier, and cooling to obtain the hot melt adhesive. The EVA-based polyurethane contains an EVA molecular chain, so that the polyurethane and EVA resin have better compatibility, a better toughening effect is achieved, the shear strength and the elongation at break of the hot melt adhesive are improved, the EVA-based polyurethane contains a hydrophobic fluorine-containing alkyl chain, the hydrophobicity of the polyurethane is improved, the hydrophobicity of the hot melt adhesive is improved, and the hot melt adhesive has a good application prospect. The water absorption rate is reduced, and better water resistance is shown. Good practical application is realized in the aspects of card protecting films and the like.

The invention relates to the technical field of epoxy resin, and discloses polytetrahydrofuran-nanocellulose toughened and reinforced epoxy resin, nanocellulose has a high length-diameter ratio and can play a stress transfer role in an epoxy resin matrix, and a polytetrahydrofuran molecular chain is introduced, so that the polarity of the nanocellulose is improved, and the toughness of the epoxy resin is improved. Compared with the prior art, the nano-crystalline cellulose has the same chain segment as carboxyl-terminated polytetrahydrofuran participating in curing, so that the nano-crystalline cellulose has better compatibility and can form good dispersity in a matrix, and an active carboxylic acid methyl ester group is introduced to a molecular chain of polytetrahydrofuran, so that the molecular chain of polytetrahydrofuran is introduced to the surface of the nano-crystalline cellulose, and the nano-crystalline cellulose is prepared. A polytetrahydrofuran molecular chain contains a flexible chain segment, so that the polytetrahydrofuran has a very good toughening effect, the rigidity of the epoxy resin is reduced, and the epoxy resin has more excellent mechanical properties under the synergistic toughening action of the nanocellulose and the polytetrahydrofuran.

The invention relates to the technical field of coatings, and discloses a preparation method and application of an organosilicon waterproof coating. The organic silicon waterproof coating is obtained by uniformly stirring and mixing the solvent, the epoxy resin, the pigment filler, the dispersing agent, the defoaming agent, the polyether modified organic silicon polystyrene and the curing agent. According to the invention, polyether modified organosilicon polystyrene is added into the epoxy resin coating, crosslinked polystyrene has very high mechanical strength, a molecular main chain contains flexible siloxane, a side chain contains a polyether chain segment of a three-dimensional branched molecular chain, and the polyether chain segment and an epoxy resin molecular chain form a physical space crosslinking effect; according to the present invention, the main chain organosilicone polystyrene has characteristics of good toughening effect, significantly improved tensile strength, significantly improved elongation at break, significantly improved bending strength and significantly improved impact property, and the main chain organosilicone polystyrene has strong hydrophobicity, such that the hydrophobicity can be improved when the main chain organosilicone polystyrene is added into the epoxy resin coating material, and the water absorption rate can be easily reduced, and the water resistance can be easily improved.

The invention relates to the technical field of organic silicon toughening agents, in particular to a long-chain alkyl modified organic silicon toughening agent and a preparation method thereof.The long-chain alkyl modified organic silicon toughening agent is prepared through sulfydryl double-bond reaction of vinyl silicone oil and long-chain alkyl mercaptan, organic silicon hydrolysis is conducted under a certain temperature condition to synthesize silicon emulsion, long-chain alkyl is preliminarily obtained, and the long-chain alkyl modified organic silicon toughening agent is prepared. Then dropwise adding a first mixed emulsion obtained by mixing an acrylate soft monomer, octadecyl methacrylate, a functional monomer, an emulsifier and an initiator, dropwise adding a second mixed emulsion obtained by mixing an acrylate hard monomer, a functional monomer, an emulsifier and an initiator, and carrying out emulsion copolymerization reaction to obtain a long-chain alkyl group again to form an interpenetrating network system; compared with the prior art, the weather resistance and temperature stability of a polymer are improved, the molecular weight of the polymer is greatly improved, the polymer has good toughness, the toughening effect on a plastic material, especially the low-temperature toughening effect, is greatly improved, and the dosage of a toughening agent in an alloy material can be reduced.

The invention relates to chopped fiber toughened high-entropy carbide ceramic used in an ultrahigh-temperature extreme environment as well as a preparation method and application thereof. The chopped fiber toughened high-entropy carbide ceramic comprises chopped fibers with the volume fraction of 5%-20%, and a matrix is high-entropy carbide. The high-entropy carbide is toughened by adopting the chopped fibers, the SiC, W and C fibers all have the advantages of good high-temperature resistance, excellent mechanical properties and the like, and the chopped fiber form can ensure that the preparation process is simple and convenient, the toughening effect is relatively good, and anisotropy of performance and the like do not exist; the chopped fiber toughened high-entropy carbide ceramic prepared by the invention can reach about 9.9446 MPa.m <-1 > / 2, and has excellent mechanical properties.

The invention relates to the technical field of epoxy resin, and discloses a fluorine-containing resin-based composite material and a preparation method thereof, the fluorine-containing resin-based composite material comprises 100 parts by weight of epoxy resin, 10-25 parts by weight of fluorine-containing polyimide resin, 7-8 parts by weight of a curing agent, and 0.5-0.8 part by weight of an antifoaming agent; the fluorine-containing polyimide resin has excellent solubility, can be well dissolved and dispersed in an epoxy resin composite material, forms a uniform and stable composite system after being cured, can improve the mechanical strength of the material, contains a flexible alkyl long chain, has a good toughening effect on epoxy resin, and can be used for preparing an epoxy resin composite material. And the elongation at break and the impact toughness of the material are obviously improved. And the water absorption rate of the material can be reduced, and the water resistance is improved.

The invention discloses a low-temperature-resistant high-toughness asphalt pavement material, and belongs to the field of asphalt materials, and the low-temperature-resistant high-toughness asphalt pavement material comprises the following components in parts by weight: 200-250 parts of coarse aggregate, 650-750 parts of fine aggregate, 40-50 parts of mineral powder and 45-70 parts of epoxy resin asphalt, the epoxy resin asphalt comprises 45-50 parts of asphalt, 20-30 parts of epoxy resin, 20-30 parts of a core-shell curing agent and 0.1-1 part of a catalyst; a branched structure of a rigid main chain and a flexible side chain is adopted as a core structure, organic acid anhydride of a rigid structure is adopted as a shell structure, the curing agent with the core-shell structure is synthesized through ring-opening metathesis polymerization design, the curing agent has good compatibility with epoxy resin, and an epoxy asphalt material obtained through the curing agent has the advantages that the curing agent has a good curing effect; and under the low-temperature condition, excellent toughness and relatively good mechanical strength are achieved.

The invention belongs to the technical field of high polymer materials, and particularly provides a low-temperature-resistant toughened polyamide 66 composite material and a preparation method thereof, and the polyamide 66 composite material comprises the following components in parts by weight: 86-95 parts of polyamide 66, 5-10 parts of a toughening agent, 0.5-2 parts of a flow modifier, 0.25-0.5 part of a lubricant, 0.25-0.75 part of an antioxidant and 0.5-2 parts of black master batch. According to the low-temperature-resistant toughened polyamide 66 composite material disclosed by the invention, the polyamide 66 material is subjected to toughening and fluidity modification by using the self-made toughening agent and the organic silicon flow modifier, so that the low-temperature-resistant toughened polyamide 66 composite material is obtained. The composite material has good low-temperature toughness and fluidity, is simple in preparation process and low in cost, and can be used for ribbons, buckles, wire slots, pipe clamps and the like on electric automobiles or industrial equipment in extremely cold environments.

The invention relates to the technical field of furniture boards, and discloses an environment-friendly shaving board and a preparation method thereof.The environment-friendly shaving board is prepared from pentaerythritol glycidyl ether, hexadecyl dimethyl tertiary amine, epoxy chloropropane and the like, an obtained polyepoxy quaternary ammonium salt cross-linking agent generates multiple bonding effects with soybean protein, polyhydroxy phytic acid and graphene oxide, and the environment-friendly shaving board is prepared. The obtained environment-friendly flame-retardant mildew-proof adhesive and bamboo wood shavings are subjected to glue mixing and hot press molding, and the environment-friendly shaving board is obtained. Polyhydroxy phosphoric acid is rich in phosphorus element and has a flame-retardant effect; the quaternary ammonium salt group has a relatively good prevention and treatment effect on molds and chromotropic bacteria; the polyepoxy quaternary ammonium salt cross-linking agent is equivalent to a physical cross-linking point in the shaving board, and is nailed and anchored together with the bamboo shavings due to an adhesive, so that microcracks are prevented from further expanding into large cracks, the board blank is denser, and the reinforcing and toughening effects are achieved; the raw materials are wide in source, non-toxic, harmless, free of formaldehyde release and environment-friendly.

The invention provides poly (butyl acrylate), a preparation method and ASA (acrylonitrile styrene acrylate) resin. The preparation method of the poly (butyl acrylate) comprises the following steps: S1, mixing butyl acrylate, an RAFT reagent, an emulsifier, an optional electrolyte and water, and then adding an initiator and a reducing agent for reaction to obtain a PBA seed emulsion; s2, mixing butyl acrylate, an RAFT reagent, an emulsifier, an initiator and water to obtain a pre-emulsion; s3, a reducing agent and the pre-emulsion are added into the PBA seed emulsion for a reaction, and poly (butyl acrylate) is prepared. The prepared poly (butyl acrylate) is high in molecular weight, narrow in molecular weight distribution, high in branching degree and good in rubber toughening effect, the ultrahigh impact ASA resin can be prepared with a small amount of rubber powder, the impact strength is larger than 400 J / m, the weather resistance is extremely good, and dE is smaller than 15 after an ultraviolet aging test is conducted for 500 h.

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 hyperbranched polyurethane elastomer, 2-8 parts by weight of a filler, and 0.3-0.5 part by weight of an antioxidant; the hyperbranched polyurethane elastomer contains an alkyl long chain with good compatibility with polypropylene, and meanwhile, in the high-temperature melt extrusion process, the alkyl long chain and a polypropylene molecular chain form a physical chain winding effect, so that the compatibility between the polyurethane elastomer and the polypropylene is remarkably improved, and the interfacial force between the polyurethane elastomer and the polypropylene is improved; the hyperbranched polyurethane elastomer has a better toughening effect, and the tensile property, the bending strength and the impact strength are obviously improved.

The invention relates to the technical field of concrete material preparation, and particularly discloses a homogeneous multi-dimensional basalt reinforced material as well as a preparation method and application thereof. The reinforcing material comprises basalt fibers and basalt fiber powder anchored on the surfaces of the fibers through silicon dioxide amorphous layers formed on the surfaces of the fibers in situ. The preparation method comprises the following steps: (1) dispersing basalt fibers into ethanol in which tetraethoxysilane is dissolved, heating, and then adding acid liquor to carry out hydrolysis reaction on the tetraethoxysilane, so that a silicon dioxide amorphous layer is formed on the surface of the basalt fibers; and (2) adding basalt fiber powder, stirring until the solution is clear, cooling to room temperature, and continuing to age the silicon dioxide amorphous layer. And after the reaction is finished, separating out a solid product, washing and drying to obtain the homogeneous multi-dimensional basalt reinforced material. According to the invention, not only is the dispersity of the basalt fiber improved, but also the corrosion resistance of the basalt fiber in an alkaline environment generated by muddy water is improved.

The invention relates to water-permeable colored asphalt concrete and a preparation method thereof, and belongs to the technical field of asphalt concrete.The water-permeable colored asphalt concrete is composed of colored modified asphalt and aggregate, and the mass ratio of the colored modified asphalt to the aggregate is (1-2): 10. The colored modified asphalt is composed of road petroleum asphalt, modified calcium carbonate whiskers, modified rubber powder, a composite anti-stripping agent and an inorganic pigment. According to the permeable colored asphalt concrete prepared by the invention, the Marshall stability is 8.39 to 8.91 kN, the compressive strength is 57.9 to 64.5 MPa, the water stability RMS is 97.5 to 98.4 percent, the TSR is 95.2 to 97.0 percent, the porosity is 18.4 to 21.6 percent, and the permeability coefficient is 61 to 70 mm / s.

The invention discloses a quartz fiber toughened aluminum-carbon refractory material and a preparation method thereof, and belongs to the technical field of aluminum-carbon refractory materials. The refractory material comprises a main material, quartz fibers and a binding agent, the main material comprises the following components in percentage by weight: 65-70% of sintered tabular corundum particles, 10-15% of sintered tabular corundum fine powder, 5-10% of carbon black, 1-3% of boron carbide, 1-6% of activated aluminum oxide and 4-8% of silicon powder; the addition weight of the quartz fiber is 0.1-0.9% of the weight of the main material; the adding weight of the binding agent is 3-5% of the weight of the main material. The preparation method comprises the following steps: heating and uniformly mixing carbon black, boron carbide, activated aluminum oxide, silicon powder, quartz fibers and a part of binding agent in a closed strong stirrer, adding the rest raw materials, mixing, kneading, ageing, mechanically pressing, drying, and carrying out segmented heat preservation and heat treatment in a carbon-buried atmosphere, thereby obtaining the high-strength silicon-carbon composite material. And finally, the aluminum-carbon refractory material with high strength, good toughness, excellent thermal shock resistance and long high-temperature service life is prepared.

The invention relates to the technical field of rubber materials, in particular to a preparation method and application of a fiber-doped rubber material. The preparation method comprises the following steps: plastifying a polyurethane composite material at 100-120 DEG C for 3-5 minutes, adding nitrile rubber, and plastifying for 3-5 minutes to obtain plastified rubber; adding carbon black, a plasticizer, sulfur, an accelerant, metal fibers, zinc oxide and an anti-aging agent into the plasticated rubber, and mixing to obtain mixed rubber; calendaring and molding the rubber compound to obtain the rubber material. The rubber material prepared by the invention not only has excellent mechanical properties and wear resistance, but also has excellent aging resistance, and can be applied to a preparation process of a composite silencing plate, so that the silencing and damping performance of the composite silencing plate is improved.

The invention belongs to the technical field of high-entropy alloys, and particularly relates to a CoCrNi series high-toughness high-density twin boundary medium-entropy alloy and a preparation method thereof. Aiming at the situation that the traditional alloy component design field lacks mature and reliable design principles, the invention provides three component design principles: high elastic modulus, low stacking fault energy and proper phase stability. Based on the three principles, the general formula of the non-equal-atomic-ratio medium-entropy alloy is CoaCrbNic, 30 < = a < = 37, 30 < = b < = 35, and 28 < = c < = 40. A metal raw material with the purity being 99.5% or above is polished and cleaned and then smelted into a cast ingot in a vacuum arc furnace, and then the medium-entropy alloy with high strength and toughness and the high-proportion twin boundary can be obtained after solid solution, hot rolling and recrystallization annealing processes are conducted. The design principle can also be popularized to other alloy systems, operation is easy, the production period is short, safety and reliability are achieved, and wide application prospects are achieved.

The invention discloses hydrogel wound application and a preparation method thereof, and relates to the technical field of wound application. The formula of the hydrogel wound application is adjusted, so that the hydrogel wound application can be prepared at normal temperature, redundant containers are not needed, and meanwhile, the hydrophilic alginate fibers are added, so that the toughness of gel is improved, and the phenomena of breakage, fracture and lacking of gel caused by insufficient strength of the gel are reduced.

The invention relates to the technical field of coatings, and discloses a preparation method of an environment-friendly wear-resistant water-based coating, which comprises the following steps: adding water-based epoxy resin, modified polyester fiber, a defoaming agent, a thickening agent, a pigment filler and a dispersing agent into water, and shearing and dispersing through a high-speed dispersion machine to obtain the environment-friendly wear-resistant water-based coating. According to the preparation method, the polyester fiber is subjected to ultraviolet radiation grafting modification by using the styryl sulfoacid imine monomer, and a large number of hydrophilic sulfonate groups and active imino groups are introduced to the surface of the fiber, so that the dispersity of the polyester fiber in a water-borne epoxy resin coating is improved, and the wear resistance and the hardness are improved. Active imino groups on the surface of the modified polyester fiber can be subjected to a curing reaction with epoxy resin, so that the interface bonding force between the polyester fiber and the epoxy resin is enhanced, a very good toughening effect is achieved, and the tensile strength, the elongation at break and the impact strength of the epoxy resin are improved.

The invention discloses a reaction bonding silicon carbide ceramic membrane and a preparation method thereof, and belongs to the technical field of porous ceramics. The preparation method of the reaction binding silicon carbide ceramic membrane comprises the following steps: uniformly mixing first silicon carbide powder, first silicon powder and first titanium-silicon-iron alloy powder, adding an organic binding agent and a polyol plasticizer, and granulating and forming to prepare a support body green body; uniformly mixing second silicon carbide powder, second silicon powder, second titanium-silicon-iron alloy powder, a water-based polymer dispersant and water to obtain slurry, and coating the surface of the support body green body with the slurry to obtain a support body green body containing a film layer; and sintering the support body green body containing the membrane layer at 1200-1400 DEG C in a nitrogen-containing gas atmosphere to obtain the reaction bonding silicon carbide ceramic membrane. The reaction combined silicon carbide ceramic membrane prepared by the method has excellent thermal shock resistance.

The invention relates to a recycled polypropylene modified plastic and a preparation method thereof, belonging to the technical field of modified materials. The plastic comprises 100 parts of recycled polypropylene, 15-20 parts of a toughening modifier, 1-1.5 parts of an initiator, 3-5 parts of a compatibilizer, 1-2 parts of an antioxidant, 1-2 parts of a light stabilizer and 2-3 parts of a lubricant in parts by weight; wherein the toughening modifier has good compatibility with a recycled polypropylene resin matrix, forms a soft connection between silicon dioxide and the recycled polypropylene resin, and is beneficial to improving the toughening effect of silicon dioxide; secondly, the toughening modifier can be grafted onto a recycled polypropylene molecular chain under the action of the initiator, thereby increasing the degree of branching; finally, hydrogen bonds exist between amide structures on the branch chains; when an external force acts on the recycled polypropylene resin matrix, the hydrogen bonds are preferentially dissociated, thereby weakening the influence of the external force on the main chain, effectively alleviating the stress concentration phenomenon; meanwhile, the hydrogen bonds can be formed again at room temperature, thereby realizing self-healing ability.

The invention relates to a modified basalt fiber bar and a light and thin super-tough road cover plate containing the modified basalt fiber bar, and belongs to the technical field of building materials.The modified basalt fiber bar and the light and thin super-tough road cover plate containing the modified basalt fiber bar are characterized in that a silicon dioxide nano particle-polyurethane compound is added into epoxy resin to reinforce and toughen the epoxy resin, and polyurethane is coated on the surfaces of nano silicon dioxide particles; on one hand, the compatibility of the silicon dioxide nanoparticles and the epoxy resin can be improved, agglomeration of the silicon dioxide nanoparticles in the epoxy resin is avoided, and on the other hand, the flexibility of the epoxy resin can be further improved by utilizing the excellent flexibility and elasticity of polyurethane. According to the invention, the polyurethane fiber and the silicon dioxide nanoparticle-polyurethane compound have a synergistic effect, so that the flexibility and the impact strength of the epoxy resin are improved together, and the prepared modified basalt fiber bar has excellent mechanical properties and chemical properties and longer service life, and when the modified basalt fiber bar is added into the cover plate, the service life of the cover plate is prolonged, and the service life of the cover plate is prolonged. The mechanical property of the cover plate can be improved, and self-weight is reduced.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a toughened antistatic polyamide composite material and a preparation method thereof. The toughened antistatic polyamide composite material disclosed by the invention is prepared from the following components in parts by weight: 100 parts of polyamide resin, 10 to 40 parts of a toughened antistatic agent, 1 to 10 parts of a plasticizer and 0.05 to 0.5 part of an antioxidant, the polyamide resin is obtained by polymerizing aliphatic diacid and aliphatic diamine, and the number of carbon atoms of the aliphatic diacid and the aliphatic diamine is greater than or equal to 6. When the toughened antistatic polyamide composite material is prepared, a copolymerized polyether amide elastomer is used as an antistatic agent, and a conductive network structure can be formed in a matrix. The polyamide composite material prepared by the invention has good toughness and antistatic property, and can be used in the fields of toughening materials requiring excellent antistatic property, such as aerospace, automobiles, electrical equipment, mechanical structures, traffic equipment, textiles, papermaking machinery and the like.

The invention relates to self-excitation geopolymer concrete and a preparation method thereof, and belongs to the technical field of inorganic cementing materials, the self-excitation geopolymer concrete is composed of a powder material and a liquid material; the powder material is composed of Portland cement, fly ash, blast furnace slag, graded aggregate, modified calcium carbonate whiskers, sepiolite-loaded aluminum hydroxide, calcium tetraborate powder and polycarboxylate superplasticizer powder, and the liquid material is composed of sodium hydroxide, a tetrabutyl phosphorus hydroxide aqueous solution, a sodium water glass solution and water; according to the self-excited geopolymer concrete prepared by the invention, the 28-day compressive strength is 83.4 to 86.6 MPa, the 28-day breaking strength is 11.5 to 13.2 MPa, the 28-day dry shrinkage rate is 0.02 to 0.05 percent, the 28-day tensile bonding strength is 5.1 to 6.2 MPa, the 100-time circulating compressive strength loss rate in the aspect of freeze-thaw resistance is 0.4 to 0.8 percent, and the 100-time circulating tensile bonding strength loss rate is 0.3 to 0.6 percent.

The invention belongs to the technical field of carbon-ceramic composite materials, particularly relates to a carbon fiber toughened silicon carbide-based fire-resistant high-temperature-resistant high-toughness plate and a preparation method thereof, and further relates to application of the carbon fiber toughened silicon carbide-based fire-resistant high-temperature-resistant high-toughness plate composition in aircraft engines and rocket propellers. The silicon carbide layer is firstly formed on the surface of the carbon fiber to serve as a transition layer, the transition layer can be firmly connected with the carbon fiber and can also be effectively connected with silicon carbide, the problem that the surface of the carbon fiber yarn and the interface of a silicon carbide material cannot be tightly connected is solved, and the sufficient filling and bonding strength of the silicon carbide on the carbon fiber fabric is improved; the toughness of the composite material is greatly improved, and the firmness of the whole structural component is improved.