167results about How to "Play a toughening role" patented technology

The invention relates to a high-gloss enhanced PET toughening composite material, which has the following components based on weight proportion: 100 portions of PET, 0.5-5.0 portions of modified nano-intensifier, 0.1-10 portions of nucleating acceleant, 5.0-25 portions of toughener, 10-45 portions of glass fibers, 0.1-1.0 portion of chain extender, 0.1-0.5 portion of antioxidant and 0.3-0.5 portion of lubricant. The preparation method is that the components are evenly mixed on a high-speed mixer and melted and blended by a twin-screw extruder to prepare the composite material. The composite material has the advantages of fast crystallization rate, high gloss and good mechanical properties.

The invention relates to flame-retardant modified carbon fiber prepreg and a composite material product with high flame retardance. A flame-retardant film with an interlayer combustion barrier action can be formed after being applied to a carbon fiber reinforced lamination resin based composite material, and the film has a certain thickness, consists of a thermoplastic toughening agent capable of being thermally dissolved into resin and a flame retardant and/or nano particles which are uniformly dispersed into the film, and is used for preparing the flame-retardant modified carbon fiber resin prepreg together with conventional carbon fiber resin prepreg. After the prepreg is prepared into the composite material, a continuous combustion barrier layer is formed among layers and is dispersed into a layer with a high carbon fiber content to take a collaborative barrier effect, thereby achieving a good flame retardance effect. UL94 perpendicular combustion method shows that the flame-retardant level can reach V0 above without overflowing smog in combustion, while an unmodified composite material has no flame-retardant level and generates a great amount of smog, and moreover, the iris layer has a dual-continuous complex-phase structure, and the toughness of the composite material can be improved.

The precent invention discloses a poly-o-phthalonitrile resin and a preparetion method. After the solution blending, fusion blending or physical blending of 1 to 99 percent of o-phthalonitrile derivative with amino group or hydroxyl group and 1 to 99 percent of polyethernitrile with amino group or hydroxyl group, or 1 to 99percent of o-phthalonitrile derivative with amino group or hydroxyl group and 1 to 99 percent of o-phthalonitrile derivative, or 1 to 99 percent of polyethernitrile with amino group or hydroxyl group and 1 to 99 percent of o-phthalonitrile derivative, or 1 to 98 percent of o-phthalonitrile derivative with amino group or hydroxyl group, 1 to 98 percent of polyethernitrile with amino group or hydroxyl group and one to ninety eight percent of o-phthalonitrile derivative, the compound is solidified, so that the poly-o-phthalonitrile resin is prepared. Because the invention uses the o-phthalonitrile derivative with amino group or hydroxyl group or / and the polyethernitrile to prepare the poly-o-phthalonitrile resin, the performance of the resin can be regulated and controlled in a wide range, and the tenacity of the poly-o-phthalonitrile resin can also be increased, thus broadening the application field of the resin. The invention also has the advantages of simple steps and low cost.

The invention discloses wear resistant self-lubricating polyformaldehyde, which is prepared by the following components through a preparation method comprising the following steps: adding 100 parts of POM (polyoxymethylene) resin, 0.1-0.3 part of antioxidant, 0.05-2 parts of formaldehyde absorber, 0.05-0.5 part of formic acid absorber, 15-30 parts of thermoplastic fluorine-containing polyester elastomer, 10-30 parts of polytetrafluoroethylene micro-powder, 0.1-5 parts of inorganic nano-particles subjected to surface treatment and 0.05-0.5 part of lubricant into a high-speed mixer and mixing, melting and mixing by an exhaust type double-screw extruder, extruding and pelleting to obtain the polyformaldehyde, wherein a rotating speed of screws is 50-200 revolutions per minute, and the temperature of a charging barrel is 140-220 DEG C. According to the invention, the thermoplastic fluorine-containing polyester elastomer with excellent strength and toughness and better compatibility with POM and PTFE (polytetrafluoroethylene) and the inorganic nano-particles are composited with POM and PTFE, so that a tensile strength of the polyformaldehyde reaches 45 MPa, and a notch impact strength reaches about 20 KJ/m<2>.

The invention relates to a high-weather-resistance acrylate resin composition and a preparation method thereof. The raw materials of the high-weather-resistance acrylate resin composition comprise the following components in part by weight: 10 to 30 parts of acrylate rubber powder 1, 10 to 30 parts of acrylate rubber powder 2, 30 to 60 parts of SAN resin 1, 5 to 20 parts of heat-resistant modifier, 5 to 15 parts of weather-resistant master batch, 0.3 to 3 parts of lubricant and 0.05 to 0.5 part of antioxidant. The preparation method comprises the following steps of: stirring the raw materials except the weather-resistant master batch to obtain a mixture; adding the mixture from a main feed inlet of a double-screw extruder, and adding the weather-resistant master batch from a side feed inlet; and extruding and pelleting the raw materials by the double-screw extruder to obtain a sample. The high-weather-resistance acrylate resin composition prepared by the method has higher heat resistance, low-temperature impact resistance, weather resistance, excellent size stability and processing property, and is particularly suitable for automobile exterior trim parts, such as radiator grilles, rear-view mirrors, license plates, central pillar plates, outdoor triangular blocks and the like, with high requirements on weather resistance, heat resistance and low-temperature impact resistance.

The invention relates to a yttrium silicate modified silicon carbide fiber reinforced silicon carbide composite material and a preparation method thereof. The preparation method comprises the following steps: (1) sequentially preparing a yttrium silicate interface layer and a silicon carbide interface layer on the surface of a silicon carbide fiber prefabricated body so as to obtain a yttrium silicate modified silicon carbide fiber prefabricated body; (2) soaking the yttrium silicate modified silicon carbide fiber prefabricated body prepared in the step (1) into a carbon precursor solution, and sequentially carrying out a curing step and a cracking step on the soaked yttrium silicate modified silicon carbide fiber prefabricated body; (3) at least repeating the step (2) once so as to obtaina porous silicon carbide fiber prefabricated body; (4) carrying out a liquid silicon infiltration reaction on the porous silicon carbide fiber prefabricated body prepared in the step (3), thereby obtaining a yttrium silicate modified SiC/SiC composite material. The yttrium silicate modified SiC/SiC composite material provided by the invention has excellent oxidation resistance, temperature resistance, vapor corrosion resistance, and the like, and is excellent in comprehensive property.

The invention discloses a quantum dot material, a preparation method, a quantum dot film, a backlight module and a display device, and belongs to the technical field of liquid crystal display. The preparation method of the quantum dot material includes the steps of a, evenly mixing silicate ester, organic solvent, silane coupling agent, polymer monomer, initiator and water, wherein the polymer monomer is a monomer for preparing a transparent flexible polymer, and the initiator is an initiator for initiating the polymerization reaction of the polymer monomer; b, adding quantum dots into a system obtained in the step a to be evenly mixed; c, making the system obtained in the step b react for a preset period of time at preset temperature to form wet gel; d, converting the wet gel obtained in the step c into aerogel through a supercritical drying method or a freeze-drying method to obtain the quantum dot material. The quantum dots are loaded on a three-dimensional network structure of silicon dioxide/organic polymer hybridized aerogel, the overlapping rate of the quantum dots is decreased, the light-emitting efficiency of the quantum dot film is improved, and meanwhile the water-oxygen insulation performance is improved.

The invention relates to a polymer composition, and particularly relates to a modified polyformaldehyde composition. The modified polyformaldehyde composition comprises, by weight, 80-100 parts of polyoxymethylene, 10-15 parts of a conductive additive, 4-8 parts of a dispersing agent, 1-5 parts of a light-shielding agent and 0.2-0.5 part of an antioxidant, wherein the conductive additive is graphene. In the modified polyformaldehyde composition, the graphene is used as the conductive additive, so that the modified polyformaldehyde composition has good conductive performance; surface resistivity of polyformaldehyde is effectively reduced; and by adding other series of auxiliary agents, the obtained polyformaldehyde has strong anti-static capacity, good mechanical performance, ultraviolet resistance and strong thermal oxidation resistance.

A method for preparing an aluminum alloy element surface coating comprises the following steps of sequentially pre-treating the aluminum alloy element surface, preparing aluminum alloy element surface arcing-blocking coating, preparing aluminum alloy surface insulation composite ceramic coating and performing post-treatment; the preparation of aluminum alloy element surface arcing-blocking coating is to perform coating in a deionized water electrolyte system composed of NaOH, Na2SiO3, (NaPO3)6 and K2ZrF6; the system for the preparation of aluminum alloy element surface coating comprises a stainless steel solution tank (7), tooling (4), an aluminum alloy element (5), a stirrer (2), a thermometer (6), a water-circulating cooling device (1) and power supply equipment (8). The aluminum alloy member surface coating obtained from the method and the system of the invention has the advantages of high toughness and strong binding capacity with the surface of the aluminum alloy element, long service life and excellent heat insulation performance.

The invention relates to a method for preparing aqueous epoxy resin curing agents, which comprises the following steps: firstly, uniformly mixing vulcabond, dimethylolpropionic acid, terminal hydroxyl polymers, bisphenol A, organic solvents and catalysts, preparing terminal isocyanate polyurethane performed polymers through prepolymefization reaction, using imidazole and imidazole derivatives or pyrromonazole and imidazole derivatives as terminal sealing agents for reaction, and finally, neutralizing the imidazole and the imidazole derivatives or the pyrromonazole and the imidazole derivatives to obtain the aqueous epoxy resin curing agents. In the method provided by the invention, because both the sealing agents and the neutralizing agents can react with epoxy resin, no existence of free components after curing is ensured, active -NCO released after the sealing removal can react with carboxylic acid to reduce the hydrophilicity of a system and can also react with the epoxy resin to increase the cross linking density of curing objects, the toughening effect can be realized on the epoxy resin through the induction of the terminal hydroxyl polymers, and the bisphenol A can be used for enhancing the compatibility of the curing agents and the epoxy resin and improving the integrated performance of the curing objects.

The invention discloses an ultra-viscous fiber resin asphalt wearing layer mixture and a preparation method thereof. The ultra-viscous fiber resin asphalt wearing layer mixture is prepared from the following raw materials in parts by weight: 2 to 10 parts of bisphenol-a epoxy resin, 6.5 to 8.5 parts of asphalt, 90 to 110 parts of minerals, 0.5 to 1.5 parts of a filler, 0.1 to 1 part of water and 0.01 to 0.2 part of fibers. The preparation method of the ultra-viscous fiber resin asphalt wearing layer mixture comprises the following steps: (1) firstly preparing resin asphalt: heating the asphalt to be 120 to 150 DEG C, adding the heated asphalt into a mixture A in the bisphenol-a epoxy resin, stirring for 10 to 20 min, then mixing and stirring the mixture A with a mixture B, so as to obtain the resin asphalt; (2) adding the minerals, the filler, the water and the fibers according to parts by weight, and blending the asphalt mixture under low temperature. Compared with a conventional preventive pavement maintenance micro-surface treatment technology, an ultra-viscous fiber resin asphalt wearing layer prepared from the mixture has obvious advantages.

The invention discloses a preparation method of toughening filler for organic glass. The preparation method comprises the following steps: (1) surface pre-treatment; (2) primary modification treatment; and (3) secondary modification treatment. The filler particles prepared by the preparation method are of special structures which can toughen organic glass effectively, so that the comprehensive using quality of the organic glass is improved. The preparation method has a very good popularizing and applying value.

The invention relates to a flame-retardant composition and application thereof, a PBT (polybutylene terephthalate) composite material and a preparation method of the PBT composite material. The flame-retardant composition is prepared from the following components in percentage by weight: 55 to 65 percent of aluminum diethylphosphinate, 15 to 26 percent of melamine polyphosphate, 10 to 15 percent of melamine cyanurate, 4 to 8 percent of organic modified montmorillonite and 0 to 5 percent of aluminum phosphite. When the flame-retardant composition and main materials such as PBT are melted and mixed to prepare the flame-retardant material, the prepared flame-retardant material can be decomposed to form a coke layer in the combustion process, the coke layer has the function of a heat-insulating oxygen-blocking protective layer, and meanwhile, the nitrogen-containing compound in the flame-retardant composition also has the functions of foaming and coke enhancement, and aluminum phosphite can achieve synergistic flame-retardant and whitening effects, so that the prepared flame-retardant material is good in flame retardance and can maintain good mechanical properties.

The invention discloses a special epoxy resin adhesive for a stone material. The special epoxy resin adhesive is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 20 to 35 parts of amino-terminated liquid nitrile butadiene rubber, 20 to 50 parts of dicyandiamide, 2 to 5 parts of a curing accelerant, 3 to 10 parts of nano calcium carbonate, 2 to 10 parts of kaolin, 1 to 5 parts of fly ash and 5 to 12 parts of nano silicon dioxide. The special epoxy resin adhesive for the stone material, provided by the invention, has high binding force, good strength after curing, good impacting toughness and excellent weather-resisting performance.

The invention provides a method for synthesizing an end-amino epoxy resin toughening type curing agent, and aims at solving the technical problems of effectively improving the toughness and the impact strength of a resin casting body and composites thereof. The method particularly comprises the steps that 2 mol of aromatic diamine containing ether bonds is added into a three-neck flask, nitrogen is fed, and stirring at room temperature is conducted till the aromatic diamine containing the ether bonds is completely dissolved in organic solvent; 1 mol of aromatic dianhydride is added, the temperature is controlled to be 30 DEG C, and stirring is conducted for five hours to obtain yellowish transparent liquid; the yellowish transparent liquid is dropwise added to deionized water, stirring is conducted to obtain white turbid suspension, washing and suction filtration are conducted, and a white filter cake, namely, the end-amino epoxy resin toughening type curing agent, is obtained. According to the method for synthesizing the end-amino epoxy resin toughening type curing agent, the synthesis technology is simple, and operation is convenient; the aromatic diamine containing the ether bonds and the aromatic dianhydride are adopted to synthesize end-amino polyamide acid on the condition that the molar ratio is two to one; due to the fact that amido of the end-amino polyamide acid can conduct the prepolymerization reaction with epoxy groups of epoxy resin, the polyamide acid is introduced to the molecular structure of the epoxy resin, the toughening effect is achieved, and the impact strength of the composites is increased by 20 percent.

The invention relates to a preparation method of a Ti3SiC2 MAX phase interface layer modified SiC/SiC composite material, and belongs to the field of aerospace material preparation processes. A chemical vapor deposition method is adopted, a Ti3SiC2 MAX phase interface layer is deposited on the fiber surface in a SiC fiber prefabricated body, and the thickness is 200-1200 nm. And then, a SiC interface layer is deposited on the outer side of the Ti3SiC2 MAX phase interface layer through a chemical vapor deposition method, and the Ti3SiC2 MAX phase interface layer is completely coated with the SiC interface layer with the thickness ranging from 3 micrometers to 5 micrometers. Then a proper resin precursor for repeated dipping, curing and cracking treatment is selected to obtain a green body containing a porous carbon matrix; and finally, liquid silicon melting reaction is performed in a high-temperature infiltration furnace to obtain the SiC/SiC composite material. The Ti3SiC2 MAX phase has excellent chemical stability, heat-conducting property and friction property so that the performance of the SiC/SiC composite material under a high-temperature condition can be effectively improved.

The invention discloses an environmentally-friendly dope for solidifying direct-vacuum aluminized paper by an electron beam and a preparation method thereof. The preparation method comprises the following steps of: weighing 10-90 parts of epoxy resin, 5-30 parts of epoxy active diluents, 2-5 parts of initiators; agitating the epoxy active diluents and raising the temperature to 50-60 DEG C; adding the epoxy resin, agitating for 30 min; adding the initiators, filtering after uniform agitating and obtaining the required environmentally-friendly dope for solidifying the direct-vacuum aluminized paper by the electron beam. The dope has moderate viscosity and can be applied to prime coat and surface coating processes of the direct-vacuum aluminized paper; and compared with a dope layer of a traditional dope, a dope layer solidified by the electron beam is more greatly improved in temperature tolerance and flexibility, and the anti-burst performance during the bending of the direct-vacuum aluminized paper is improved.

The invention relates to the field of Mg-Ca-containing refractory materials, in particular to a Mg-Ca-Zr-Ti brick for a cement kiln and a preparation method of the brick; the Mg-Ca-Zr-Ti brick for the cement kiln is characterized by comprising the following raw materials by weight percent: 95-99% of synthesized Mg-Ca sand, 1-5% of electric smelting stable zirconium oxide, 1-3% of titanium dioxide and bonding agent, wherein the weight of the bonding agent accounts for 2-5% of the total weight of the three raw materials, and paraffin is adopted as the bonding agent. The preparation method of the brick has the technological process steps of: preparing the raw materials, blending, mixing, drying, molding by pressing and sintering and is characterized in that the sintering temperature is between 1520 DEG C and 1570 DEG C. Compared with the prior art, on the premise that the advantages of a magnesite-dolomite brick are maintained, the Mg-Ca-Zr-Ti brick effectively overcomes the disadvantages of the conventional magnesite-dolomite brick, such as thermal shock resistance and high hydration rate; and the Mg-Ca-Zr-Ti brick has the characteristics of good thermal shock resistance and good hydration resistance, and can be used for replacing a magnesite-chrome brick used for a cement kiln burning zone, thus realizing non-chromium characteristic of the refractory brick for the cement kiln.

The invention belongs to the technical field of preparation of structure-function integrated composite materials, and relates to a composite material combustion barrier structure and a composite material thereof. A carbon fiber prepreg of a prefabricated structured interlayer combustion barrier structure is developed, and the prefabricated structured interlayer combustion barrier structure is distributed on the surface of the prepreg, has a certain thickness and is in mesh distribution. The prepreg comprises resin, a thermoplastic toughening agent which is thermally dissolved into the resin, and fire retardants and/or nanoparticles which are evenly distributed into the thermoplastic toughening agent. After the prepreg is prepared into the composite material, a continuous combustion barrier layer is formed between layers and diffused into the layer with high carbon fiber content to play a cooperative barrier role, so that the composite material combustion barrier structure plays a good flame-retardant role. A UL94 vertical combustion method shows that the flame-retardant level can reach the V0 level, no smoke overflows in combustion, a composite material molding technology is facilitated due to the mesh distribution, and the influence on the outer surface performance of the composite material is avoided.

The invention discloses a high-abrasion high-alumina brick with heat shock resistance. The high-abrasion high-alumina brick comprises the following components in parts by weight: 5-15 parts of 3-5mm super alum aggregate, 30-40 parts of 1-3mm super alum aggregate, 10-20 parts of 0-1mm super alum aggregate, 20-30 parts of super alum powder, 5-7 parts of zirconium carbide fine powder, 2 parts of chromium carbide powder, 1-3 parts of Suzhou mud NO.2, 8-10 parts of compound binder and 4-6 parts of water. The invention also discloses a manufacturing method of the high-abrasion high-alumina brick with heat shock resistance. The high-abrasion high-alumina brick with heat shock resistance disclosed by the invention has high strength, refractoriness, high abrasion and heat shock resistance, and is applicable to a circulating fluid bed boiler cyclone separator flue, cyclone separator straight section and cone body, a return feeder, a metallurgical furnace and other thermal equipment. The high-abrasion high-alumina brick is simple in manufacturing process and easy to realize.