42results about How to "Improve brittle defects" patented technology

The invention relates to a modified glass fiber reinforced polylactic acid composite material and a preparation method thereof, relating to the field of composite materials. The composite material comprises the following components in parts by weight: 100 parts of polylactic acid, 30-40 parts of glass fiber, 5-10 parts of polyurethane prepolymer, and can be added with other components according to practical demand, such as a flame retardant agent, an antioxidant, color masterbatch and the like. The preparation method comprises the following steps: placing polylactic acid into acetone, heating and dissolving at the temperature of 40 to 50 DEG C, then adding glass fiber and polyurethane prepolymer, stirring for 1 to 2 hours, filtering, drying for 3 to 7 hours, obtaining modified glass fiber, mixing the polylactic acid and the modified glass fiber evenly, mixing the materials by an extruder or an internal mixer at the temperature of 170 to 200 DEG C, cutting into granules and obtaining the composite material. The invention overcomes the defects that the existing polylactic acid composite material has large fragility and poor compatibility, and can achieve the requirements of simultaneously strengthening and toughening the polylactic acid.

The invention discloses environment-friendly microorganism calcareous glue, a preparation method and application thereof, a sandy soil column and a preparation method thereof. The environment-friendlymicroorganism calcareous glue is prepared from a microorganism bacteria solution with mineralization performance, a calcium source nutrient solution and an environment-friendly colloid in a volume ratio of 1 to (10 to 100) to (0.001 to 1). In the preparation of the microorganism bacterial solution, a culture medium is inoculated with 5 percent of sporosarcina pasteurii serving as a strain for performing oscillation and propagation to obtain a bacteria solution; in preparation of the calcium source nutrient solution, the calcium source nutrient solution is prepared according to a formula, andthe preparation of the nutrient solution is finished no less than 3 hours and no more than 6 hours before spraying. The environment-friendly colloid liquid of biomacromolecule liquid with colloidalityis prepared by dissolving exopolysaccharide of cell secretion or purified polysaccharide products. By adopting the environment-friendly microorganism calcareous glue, the defect of large brittlenessof a calcite cementation sand material by only relying on microorganism induction is overcome, and the concretion result of sand is effectively improved.

The invention discloses a baking-free brick with waste rubber and coal ash as major raw materials. The baking-free brick is composed of the following raw materials in parts by weight: 3-10 parts of waste rubber, 30-45 parts of coal ash, 20-25 parts of yellow sand, 5-10 parts of cement, 10-15 parts of calcium oxide, 3-5 parts of calcium sulfate, 1-2 parts of sodium sulfate, 1.5-2 parts of sodium hydroxide, 0.01-0.05 parts of sodium metaaluminate and 8-15 parts of water. The baking-free brick has the advantages that (1) the major problems that the coal ash baking-free brick is high in water absorption and poor in resistance to freezing and thawing resistance are solved, and the application field and region of the coal-ash baking-free brick are greatly expanded; (2) the production process is simple, the investment is low, the cost is low, the benefit is good, the market competitiveness is strong and the capacity of the market is great; and (3) the solid wastes such as waste tire and coal ash are used for making bricks instead of the traditional clay bricks, so that the baking-free brick is a green novel building material and is an important development project in China.

The invention belongs to the technical field of the lithium ion battery, and especially relates to a lithium ion battery. The lithium ion battery comprises a nonlinear multi-arm homopolymer composed of multi-element small-molecular nuclear parent and polyacrylic acid or polyacrylate branch arm connected to the multi-element small-molecular nuclear parent; the flexibility of the binding agent is increased due to the nonlinear polyacrylic acid or polyacrylate multi-arm structure, and the nonlinear structure has the advantages of multi-dimension efficient binding and water solubility. Relative tothe linear polyacrylic acid type binding agent, the defect that the molecule is fragile is improved to a certain degree. The problem that the cycle performance is bad since the pole plate produces the cracking and peeling and like phenomena due to the own fragility of the binding agent in the battery cycle is effectively solved.

The invention relates to the technical field of manufacturing of artificial fiberboards, in particular to a method for producing a fiberboard containing an ultramicro amount of residual formaldehyde. The method for producing the fiberboard comprises the technological steps of preparation of adhesive, manufacturing of wood fibers, adhesive application, drying, mat formation and pre-pressing, hot pressing and obtaining of a finished product. According to the method, forest logging residues or wood processing residues or bagasse or other materials are used as raw materials for producing the fiberboard, waste materials are changed into valuable things, and full utilization of wood resources is effectively achieved; the adhesive used for producing the fiberboard is adhesive containing only a micro amount of residual formaldehyde, in this way, environmental friendliness and safety are achieved, and the fiberboard has good water resistance and high bonding strength; the fiberboard produced by using the adhesive hardly contains residual formaldehyde and high in binding powder; the content of substances harmful to human bodies is low, the substances harmful to the human bodies hardly exist, and thus harm to the human bodies is reduced; in addition, the internal structure of the board is uniform, the density is proper, the dimensional stability is high, the quality is stable, and the service life is long.

The invention discloses a special heat dissipation electrostatic spraying coating for an LED lamp. The heat dissipation electrostatic spraying coating is prepared from the following raw materials: epoxy resin, polyurethane, unsaturated polyester resin, maleic anhydride, methyl tetrahydrophthalic anhydride, m-phthalic anhydride, 2,4,6-tri(dimethylamine methyl) phenol, trimethylolpropane, 2-butyl-2-ethyl-1,3-propylene glycol, magnesium nitride, modified carbon nano tube, graphene, nano calcium carbonate, cerium oxide, silica powder, hexamethyl-disilazane, phenyltrimethoxysilane, phenyl methyl dimethoxysilane, dibutyltin dilaurate, a leveling agent and benzoin, wherein the epoxy resin is a mixture of biscyclopentadiene dioxide epoxy resin and o-cresol formaldehyde epoxy resin. The heat dissipation electrostatic spraying coating is high in heat dissipation property and high in high temperature resistance, and the service life of the LED lamp can be prolonged.

The present invention discloses a low-noise high-temperature-resistant brake pad, comprising a steel plate, a heat-insulating layer and a friction block; the friction block is made from phenolic resin, bismaleimide resin, carboxylic butadiene-styrene latex, epoxy resin, o-cresol formaldehyde epoxy resin, polybenzimidazole resin, high silica fiber, quartz fiber, barium sulfate, titanium carbide, nano aluminum oxide, mica, molybdenum disulfide, expanded perlite, ZrW2O8 powder, multi-walled carbon nanotubes, nano aluminum nitride, hexagonal boron nitride, epoxidized soybean oil, tung oil, polycarbosilane and brown fused alumina. The low-noise high-temperature-resistant brake pad provided herein has excellent resistance to high temperature and wear, excellent thermal stability, low noise in use and long service life.

The invention relates to the field of anticorrosive coatings, in particular to a treatment method of a coating with an anticorrosive function on an iron-based surface, which comprises the following steps: (1) polishing an iron-based alloy; (2) performing sand blasting treatment on the polished iron-based alloy; (3) cleaning the surface of the iron-based alloy subjected to sand blasting treatment,putting the iron-based alloy into a drying oven of 60-100 DEG C to be treated for 0.2-0.5 h, and spraying a first anti-corrosion coating on the surface of the iron-based alloy by using high velocity oxy-fuel while the iron-based alloy is hot; and (4) after the first anti-corrosion coating is completely dried, placing the iron-based alloy coated with the first anti-corrosion coating in a drying oven at the temperature of 60-100 DEG C to be treated again for 0.2-0.5 h, and then spraying a second anti-corrosion coating on the surface of the first anti-corrosion coating through hypersonic flame while the iron-based alloy is hot. The method solves the problem that an existing treatment method for spraying a single coating usually cannot meet the requirements for high strength, corrosion resistance, abrasion resistance and the like at the same time.

The invention discloses heatproof anti-corrosion high-flame-retardant epoxy resin powder paint. The powder paint is prepared from bisphenol A epoxy resin, acrylic resin, modified polytetrafluoroethylene, organic silicon resin, phenolic resin, tetramethoxy methyl glycoluril, tetramethyl thiourea, toluene diisocynate, 2-methylimidazole, 2-butyl-2-ethyl-1,3-propylene glycol, nano-zinc oxide, expansible graphite, attapulgite, talcum powder, ferric oxide, zinc borate, polyethylene wax, glycerine, pentaerythritol, an acrylate flatting agent, hydroxyethyl cellulose and organic silicon defoamer. The heatproof anti-corrosion high-flame-retardant epoxy resin powder paint is good in heat resistance, excellent in ageing resistance, high in flame retardant property, good in decorativeness and long in service life.

The invention relates to the filed of production of ceramic and in particular relates to environment-friendly paper ceramic and a preparation method thereof. The environment-friendly paper ceramic is prepared from the following raw material components in parts by weight: 450-500 parts of mud, 20-25 parts of paper pulp and 90-100 parts of bone meal, wherein a weight ratio of paper scrap to water in the paper pulp is 1:2. The environment-friendly paper ceramic provided by the invention has the advantages that the paper pulp is added in the raw materials used for preparation of ceramic, so that flexibility of the whole slurry is improved, the slurry can coat a mould in a thin layer in a die moulding process, and further a ceramic product with the thickness of 1mm can be prepared; in a drying process of the environment-friendly paper ceramic, after massive moisture is removed, cracking phenomenon can not be caused or is hardly caused, further ceramic making success rate is effectively increased, and the defect that manpower and material resources are wasted as a muddy green body cracks easily in the prior art is effectively overcome.

The invention discloses a high-transparency toughness polylactic acid-based material and a preparation method thereof. The polylactic acid-based material is composed of polylactic acid, a halogenatedpolyether elastomer, an ionomer elastomer synthesized from imidazole-containing monomers, a heat stabilizer and an antioxidant. The halogenated polyether elastomer adopted by the invention is obtainedby quaternization reaction of an elastomer with a polyether chain as a main chain and a halogen group in a side chain and a compound with an imidazole group in an end group, wherein the molar contentof an ionomer group of the obtained halogenated polyether elastomer is 20-30%. The polylactic acid is premixed with the obtained elastomer ionomer, a heat stabilizer and an antioxidant, and then meltprocessing is conducted by using an internal mixer or a screw extruder. According to the method disclosed by the invention, the tough polylactic acid base material with high transparency is preparedby selecting a proper elastomer to be compounded with polylactic acid, adjusting the proportion, combining a processing technology and changing the anion type in the ionomer, so that the defect of serious brittleness of polylactic acid is improved, and the application field of the material is expanded.

The invention discloses a high-heat-resistance epoxy resin electrostatic-spraying powder paint which is prepared from a bisphenol A epoxy resin, dicyclopentadiene dioxide, a polyaryl thioether resin, an organic silicon resin, dicyandiamide, maleic anhydride, 2-thiobenzimidazole, 2-methylimidazole, 2-butyl-2-ethyl-1,3-propanediol, talcum powder, fumed silica, precipitation-process barium sulfate, carbon nanotubes, nano silicon dioxide, N-phenyl-3-aminopropyltrimethoxy silane, a leveling agent, a sensitizer and a defoaming agent. The high-heat-resistance epoxy resin electrostatic-spraying powder paint has the advantages of favorable heat resistance, excellent impact resistance and long service life.

The invention relates to a preparation method of an environment-friendly blue brick and belongs to the field of building wall materials. The preparation method comprises the following steps: (1) raw material pretreatment; (2) batching and stirring: weighing shale, clay, sludge, waste ceramics, vermiculite, volcanic ash, bean curd swilling, pine barks, bamboo residues and carbon according to the proportion occupied by all the raw materials, adding a proper amount of water, stirring the raw materials and uniformly mixing to obtain a mixture; (3) digesting; (4) pressing and molding: pressing and molding the digested mixture to obtain a brick blank, and naturally airing the brick blank till the moisture content is 16-20 percent to obtain the air-dried brick blank; (5) brick blank sintering: enabling the air-dried brick blank to enter a kiln for firing and sintering for 8-10 hours at a temperature of 1050-1250 DEG C; (6) sealing the kiln and cooling. According to the preparation method of the environment-friendly blue brick, the cost can be reduced, and safety and environmental protection are realized.

The invention discloses a potassium feldspar tailing environmentally-friendly brick and a preparation method thereof, and relates to the technical field of preparation of an environmentally-friendly brick. The preparation method comprises the following steps: (1) taking the following components in parts by weight: potassium feldspar tailing, oyster shells, sludge, ceramic powder, vermiculite powder, cinerite, bean curd swill, pine bark scraps, bamboo scraps, carbon powder, modified coal ash, quick lime, an anti-cracking agent and a foaming agent; (2) pulverizing the potassium feldspar tailing,the oyster shells, the ceramic and the vermiculite into powder; (3) mixing the feldspar tailing powder and the oyster shell powder, adding water and grinding to obtain a first mixed material; (4) adding water into all the raw materials and stirring to obtain a second mixed material; (5) digesting; (6) pressing and forming; (7) sintering a green brick; and (8) sealing a kiln and cooling. Accordingto the potassium feldspar tailing environmentally-friendly brick and the preparation method thereof, waste serves as the raw material, so that the production cost is reduced while environmental pollution is reduced.

The invention relates to a chemically amplified positive ultraviolet photoresist, and a preparation method and a using method thereof. The photoresist comprises, by mass, 25-45% of poly-p-hydroxystyrene polymer resin; 0.5-1.5% of a photoinduced acid generator; 0.1-0.2% of an acid quencher; 2-4% of a cross-linking agent; 0.1-0.5% of a flatting agent; and 48.8-72.3% of a solvent. The preparation method comprises the following step: mixing the components of the chemical amplification type positive ultraviolet photoresist. The using method comprises the following steps: coating a silicon wafer with the chemical amplification type positive ultraviolet photoresist, and sequentially carrying out pre-baking, exposure, post-baking and development. The chemically amplified positive ultraviolet photoresist solves the problem of photoresist cracking, especially the problem of cracking of positive thick film (10-30 microns) photoresist, is suitable for a passivation layer or a high-energy injection process at the rear section of an integrated circuit, and expands the application range.

The invention discloses a modified-2-methylimidazole-containing electrostatic-spraying powder paint which is prepared from a hydrogenated bisphenol A epoxy resin, a novolac epoxy resin, uranium dioxide dicyclopentadiene, a polyaryl thioether resin, nylon, dicyandiamide, phthalic anhydride, modified 2-methylimidazole, aluminum hydroxide, fumed silica, precipitation-process barium sulfate, carbon nanotubes, nano silicon dioxide, magnesium hydroxide, nano cerium oxide, micro wax powder, N-phenyl-3-aminopropyltrimethoxy silane, a leveling agent and a defoaming agent. The modified-2-methylimidazole-containing electrostatic-spraying powder paint has the advantages of favorable heat resistance, excellent impact resistance, low curing temperature and long service life.

The invention discloses a composite material of wood flour-modified polylactic acid and a preparation method of the composite material. The composite material is prepared from the following components in parts by weight: 11-26 parts of poplar wood flour, 8-19 parts of willow wood flour, 7-17 parts of locust wood flour, 5-17 parts of maleic anhydride, 5-12 parts of ethylene glycol, 3-12 parts of an L-lactide monomer, 4-11 parts of a silane coupling agent, 8-10 parts of a carbon nano tube and 23-50 parts of polylactic acid. The composite material of the wood flour-modified polylactic acid has the advantages that (1) the composite material is an environment-friendly material and has a wide application prospect; (2) the defect of large brittleness of the polylactic acid is improved and the performance is improved; and (3) the problem of poor compatibility of the wood flour and the polylactic acid is solved.

The invention discloses a waste plastic regeneration process, which belongs to the technical field of waste plastic regeneration. The technology comprises the following steps that 1, waste plastic is smashed, sieved, soaked in alkali liquor, cleaned and dried, and waste plastic particles are obtained; and 2, the waste plastic particles and an auxiliary agent are uniformly stirred and mixed at 110-120 DEG C, and extrusion granulation is conducted to obtain the waste plastic regenerated plastic. The auxiliary agent is added in the waste plastic regeneration process, so that the technical problems of brittleness, poor toughness and poor wear resistance of the waste plastic regenerated material are solved, and the auxiliary agent is obtained through gradual reaction of modified castor oil, dihydroxyl POSS, carboxyl-containing binary isocyanate and hydroxyl-terminated polyether modified polydimethoxy siloxane, so that molecules contain a POSS structure, a straight-chain siloxane chain and a polyether chain, the auxiliary agent has excellent compatibility with waste plastics, and the toughness, strength and wear resistance of waste plastic particles are improved by adding the auxiliary agent.

The invention discloses normal-temperature impregnating resin for fiber reinforced plastic grids. The normal-temperature impregnating resin for the fiber reinforced plastic grids is composed of, by weight, 90-100 parts of epoxy resin, 30-40 parts of epoxy resin modifying agent, 80-90 parts of normal-temperature curing agent, 5-10 parts of pigment and 1-5 parts of release agent. The normal-temperature impregnating resin for the fiber reinforced plastic grids has the advantages of being needless of heating, easy to process, low in toxicity, high in solidifying speed, resistant to corrosion and high temperatures, capable of achieving demolding easily, high in reliability, low in cost and the like.

The invention provides a TiAl-based high-temperature resistant self-lubricating composite material and a preparation method thereof, and belongs to the field of composite materials. The composite material is prepared by mixing and sintering raw materials, and comprises the following raw materials of, in percentage by mass, 5-50% of TiCx, 5-50% of Ti3AlC2 or Ti3SiC2, and the balance of TiAl mixed powder; the TiAl mixed powder comprises the following components of, in percentage by mass, 5-40% of Al, 1-5% of Cr, and the balance Ti; and x in TiCx is greater than or equal to 0.4 but smaller than or equal to 0.9 or x is equal to 1.1. The composite material not only has high bearing performance, high strength and high temperature resistance, but also has a self-lubricating property at high temperature, and is beneficial to manufacturing friction materials under severe working conditions such as high temperature.

The invention provides a single-row reinforcement sheet with fiber concrete on frames and common concrete in the middle and a manufacturing method, and belongs to the field of manufacturing of concrete slabs in building structure engineering. Fibers meeting different structure requirements are adopted by the fiber concrete according to design requirements, the common concrete is adopted except the frames of the sheet, the strength and diameter of reinforcement meshes arranged on the frames are greater than those of steel bars of an orthogonal steel wire mesh in the middle, and therefore the sheet with the fiber concrete on the frames and the common concrete in the middle is formed. The steel bars are arranged in hooks formed by bending steel wires extending from the four sides of the steel wire mesh, and a complete reinforced mesh is precast. The fiber concrete is poured on the periphery of the sheet, and the common concrete is poured in the sheet. The initial cracking resistance of the concrete sheet is improved, shrinkage plastic cracks at the early stage of the concrete are reduced, and the single-row reinforcement sheet has great significance to solution of the prevalent problems that current concrete sheets are low in sheet frame strength, prone to collision loss and high in manufacturing cost. The sheet is easy to construct, the using number of formworks and supports in construction can be greatly reduced, operation intensity of workers is lowered, and the amount of labor used in engineering is reduced.