74results about How to "To achieve the purpose of toughening" patented technology

The invention discloses a water-permeable paving material and a preparation method and application thereof. The water-permeable paving material comprises, by weight, 60-90 parts of quartz sand, 10-40 parts of Portland cement, 2-10 parts of hydrophilic epoxy resin binders, 0.5-5 parts of curing agents and 1-10 parts of water. The curing agents include one or more of aliphatic polyamine and cycloaliphatic polyamine curing agents or aromatic ring polyamine curing agents. The hydrophilic epoxy resin binders comprise, by weight, 500-950 parts of bisphenol A epoxy resin, 1-200 parts of surfactant span, 1-200 parts of surfactant tween and 0.001-0.005 part of catalysts, wherein the catalysts can be tetraethylammonium chloride, butyl triphenyl phosphorus bromide, benzyl triethyl ammonium bromide, benzyl triethyl ammonium chloride, 2- methylimidazole or optional combination of the above substances. The water-permeable paving material is prepared by uniformly stirring the quartz sand, the Portland cement, the water, the hydrophilic epoxy resin binders and the curing agents; and then placing the stirred mixture into a mould for molding and curing for 24 hours at the normal temperature prior to demolding. The water-permeable paving material is used for preparing pavement bricks, pavement slabs and sewage filtering prefabricated members by means of molding.

The invention provides high-temperature-resistant light-cured resin and a preparation method thereof. The light-cured resin comprises the following components in percentage by mass: 40%-70% of epoxy resin, 5%-20% of acrylic resin, 10%-20% of an active diluent, 3%-6% of a cationic photoinitiator, 1%-3% of a free-radical photoinitiator, 5%-20% of a flexibilizer and 0.1%-3% of an inorganic filler. The high-temperature-resistant light-cured resin is high in curing reaction rate and has both toughness and strength.

The invention discloses an insulating heat conducting cable material. The insulating heat conducting cable material comprises the following raw materials in parts by weight: 60 to 70 parts of high-density polyethylene, 20 to 30 parts of modified polypropylene, 15 to 25 parts of heat conducting filler, 6 to 10 parts of polyolefin elastomers, 5 to 8 parts of glass fibres, 3 to 5 parts of a compatilizer, 3 to 8 parts of modified zinc borate, and 10 to 15 parts of ethylene-vinyl acetate copolymer. The insulating cable material is high in heat conductivity, high in insulating property, high in tensile strength, high in toughness, and convenient to process.

The invention relates to a method for toughening epoxy resin by adopting modified wollastonite. The method is characterized by comprising the following steps: stirring the wollastonite for 30 minutes at the temperature of 80 DEG C so as to improve reaction activity; carrying out wet modification on the wollastonite with a silane coupling agent KH-570; and then toughening the epoxy resin by utilizing the modified wollastonite, wherein the tensile strength and the impact strength of the modified epoxy resin are greatly improved. According to the invention, the wollastonite is subjected to surface treatment and then the epoxy resin is subjected to toughening modification with the modified wollastonite, thus the process is simple and convenient for operation, thereby reaching the toughening purpose, reducing production cost and sufficiently utilizing the wollastonite so as to improve the additional value of the wollastonite.

The invention discloses a material for a reinforced plastic woven bag. The material is characterized by being prepared from the following raw materials in parts by weight: 100 parts of isotactic polypropylene, 18 to 30 parts of low density polyethylene, 3.2 to 5.4 parts of molybdenum disulfide, 0.8 to 1.2 parts of an antioxidant, 2 to 4 parts of an ultraviolet absorbent, 6 to 12 parts of talcum powder, 0.01 to 0.2 part of pimelic acid, 0.4 to 1.2 parts of stearate and 2 to 10 parts of calcium carbonate whiskers, wherein stearate comprises calcium stearate. The material has the advantages of high tensile strength and high toughness.

The invention provides a method for preparing a carbon fiber composite material interface layer. The method comprises the following steps: coating the surface of a carbon fiber by using a sizing agent with carbon nanotubes, phenolic resin, a curing agent and a solvent, curing, and performing high temperature thermal treatment, thereby obtaining a pyrolytic carbon coated layer with the carbon nanotubes. Effects of strengthening and toughening can be achieved in a composite material with the carbon fiber as a reinforcing part. The method is simple and feasible and low in cost, the process complexity of the method is greatly reduced as compared with those of conventional CVD and EPD, in addition, process conditions are easy to control, the carbon fiber self is not damaged in the preparation process, and the influence upon the performance of the carbon fiber self is reduced.

The invention provides a preparation method for a polyimide three-layer composite film with an electromagnetic shielding function. When carbon nanotubes are employed for modification of a polyimide film, the resistivity of the polyimide film can be effectively reduced; however, with increase of the content of the carbon nanotubes, the carbon nanotubes are substantially agglomerate in polyimide, which leads to drastic decrease of the mechanical properties of the polyimide film. The preparation method provided by the invention comprises the following steps: (1) preparation of a carbon nanotube-modified polyamide acid solution; (2) preparation of a carbon nanotube-modified polyamide acid microporous film by using an electrostatic spinning method; (3) preparation of a polyamide acid solution; (4) coating of two sides of the microporous film with the polyamide acid solution; and (5) thermal imidization of a prepared carbon nanotube-modified polyimide acid three-layer composite film. The polyimide three-layer composite film prepared in the invention is mainly applied to broaden the application scope of polyimide films in the field of electromagnetic shielding materials.

The invention provides polypropylene/polyethylene/wood fiber composite and a preparation method thereof. The composite comprises 30%-70% of polypropylene, 10%-50% of polyethylene, 10%-25% of wood fiber, 0.1%-2% of a lubricant, 0.1%-1% of an antioxidant and 3%-10% of a compatibilizer. Polypropylene, polyethylene and wood fiber as well as the lubricant, the antioxidant and the compatibilizer are added to a blender mixer separately, stirred and mixed, and a mixed material is obtained; the mixed materials are further mixed uniformly and pelletized by a double-screw extruder, and the pelletized mixed materials are dried. On one hand, the polypropylene, polyethylene and wood fiber composite prepared with the method overcomes defects of poor rigidity and notch sensitivity of polypropylene; on the other hand, the cost of the composite is substantially reduced due to use of the resourceful and recyclable wood fiber with low price, and the environment protection performance is also improved.

The invention relates to a deformation heat treatment method for toughening high-performance deformation rare-earth magnesium alloy, and belongs to the technical field of the alloy. The method comprises the following steps that 1) homogenizing heat treatment is performed; 2) pre-annealing heat treatment before deformation is performed, wherein pre-aging treatment is performed on an ingot blank needing to be extruded to deform at an extrusion temperature for 0.1h to 9h; 3) reverse extrusion deformation treatment is performed, wherein extrusion deformation treatment is performed on the pre-agedsample, the extrusion temperature is 400 DEG C to 450 DEG C, the extrusion ratio is 10:1 to 20:1, and the extrusion speed is 1 mm/s; and 4) aging heat treatment is performed, wherein T6 aging heat treatment is performed on the sample obtained after extrusion deformation. According to the deformation heat treatment method, the purposes that the toughness of the alloy can be obviously enhanced whilethe high strength is kept can be achieved, and the problem that the deformed magnesium alloy is high in strength and low in toughness is solved.

The invention belongs to the technical field of lubricants, and in particular relates to a preparation method of a reinforcing and toughening lubricant specially used for ABS. The method comprises thefollowing steps: firstly nano powder is added into ethanol, a treating agent is added to modify the surface of the powder, the obtained treated nano powder is added into ethylenediamine to obtain aminated nano powder, the aminated nano powder and stearic acid are subjected to a reaction at high temperature to obtain a waxy substance, glass cellulose modified by glyceryl monostearate can be addedinto the waxy substance, extrusion granulation is performed, and therefore the reinforcing and toughening lubricant specially used for the ABS can be obtained. According to the method provided by theinvention, the prepared lubricant is added into the ABS resin, and the lubricant has good compatibility with the ABS resin, and improves the impact strength and bending strength of the ABS resin whileimproving the fluidity of the ABS resin.

The invention relates to the technical field of aluminum template surface coatings, and in particular, relates to a surface coating for an aluminum template as well as a preparation method and an application method of the surface coating. The surface coating comprises the following raw materials in parts by weight: 100-200 parts of ethyl acetate, 100-200 parts of modified epoxy resin, 50-100 parts of organic silicon resin, 20-40 parts of alumina powder, 10-30 parts of a dispersing agent, 10-15 parts of a flatting agent, 10-20 parts of silicone oil, 5-10 parts of an organic silicon defoaming agent, 5-10 parts of dipropylene glycol butyl ether and 10-20 parts of a curing agent. The surface coating disclosed by the invention can prevent concrete from chemically reacting with the aluminum template, has a good protection effect on the surface of the aluminum template, can improve the smoothness of a wall surface, is easy to clean and reuse the aluminum template, and improves the use frequency of the aluminum template.

The invention discloses a high-impact-strength transparent PVC/MBS alloy material and a preparation method thereof. The alloy material comprises, by mass, 100 parts of PVC resin, 50-120 parts of MBS resin, 4.0-6.0 parts of stabilizer, 4.0-8.0 parts of impact modifier, 3.0-5.0 parts of processing auxiliary, 1.0-3.0 parts of weather-resistant agent and 5.0-25.0 parts of inorganic filler. Being mixed evenly according to a certain process by means of a high cooling mixing unit, the raw materials are extruded through a conical dual-screw extruder and granulated. The formula is further optimized, impact resistance of PVC is greatly improved, and transparency is also improved. The situation that a plasticizer is used in the prior art for changing the plasticity of PVC is abandoned, MBS and PVC are mixed to adjust the plasticity of PVC, and the prepared PVC/MBS alloy material can be used in the aspect of transparent PVC profiles, sheets, PVC transparent environment-friendly hoses, transparent packages, daily stationery plastic and the like.

The invention relates to a polyphenyl ether reclaimed material and a preparation process thereof, and relates to the technical field of reclaimed materials. The polyphenyl ether reclaimed material comprises the following components in percentages by mass: 97.1-98.3% of waste polyphenyl ether, 0.8-1.2% of an ethylene-acrylic acid copolymer, 0.4-0.6% of nanometer silicon dioxide, 0.2-0.5% of an antioxidant, 0.1-0.3% of a toughening agent, 0.02-0.05% of a heat stabilizer, 0.03-0.06% of a lubricating agent, 0.05-0.1% of a flame retardant, 0.01-0.03% of paraffin and 0.03-0.05% of calcium stearate.The polyphenyl ether reclaimed material prepared by using the method provided by the invention is excellent in mechanical properties, and the service life of a product prepared from the polyphenyl ether reclaimed material can be prolonged. The preparation process disclosed by the invention has the following advantages: the prepared polyphenyl ether reclaimed material is stable in performance; andthe preparation process is simple and convenient to operate.