66results about How to "Strong interface adhesion" patented technology

The invention relates to a preparation technique of a wood plastic composite material, in particular to a method for preparing a wood plastic composite material by using modified wood powder and waste plastics. The method is characterized in that: (1) discarded agriculture and forestry wastes are crushed, milled and dried, and three different surface modification agents are added in sequence and mixed with the waste power one after another in a high-speed mixer to produce the modified water powder; and (2) waste plastics are washed and crushed into granules with the grain size of 2mm to 12mm and then dried; the modified waste powder, the waste plastic granules, a lubricant, a vesicant and a blowing promoter are mixed by weight percentage and put into the high-speed mixer for high-speed mixing and then cooled to the temperature lower than 55 DEG C for discharging so as to prepare a special premix. The composite material has super high strength and anti-bending and anti-impact capacity, wherein, the obvious enhancement of the anti-impact strength causes the great enhancement of the processing capacity of the product, thus causing products to meet different demands and ensuring an extremely wide application range.

The invention discloses a polysaccharide/autosolidification calcium phosphate composite bone cement composition, which comprises the following components in percentage by weight: 10 to 95 weight percent of autosolidification calcium phosphate bone cement and 5 to 90 weight percent of polysaccharide. The bone cement composition can obtain bone cement with high strength, good toughness, strong plasticity, quick solidification, and good biocompatibility and degradability, thereby overcoming the defects of inadequate toughness and slow degradation in human bodies existing in the prior calcium phosphate bone cement materials and the defects existing in a plurality of enhancement methods in the prior art, and better meeting the requirement of operation use.

The invention relates to a copper toxicity-resistant glass fiber reinforced polypropylene composite material and a preparation method thereof, and the copper toxicity-resistant glass fiber reinforced polypropylene composite material consists of the following raw materials by weight percent: 60-65% of polypropylene, 2-7% of compatilizer, 0.7-2% of composite antioxidant, 0-0.02% of anti-copper toxicity agent, 0.1-0.8% of processing additives and 30-35% of glass fibers. The preparation method comprises the following steps: firstly mixing the polypropylene, the compatilizer, the composite antioxidant, the anti-copper toxicity agent and the processing additives in a high mixing machine, feeding into a twin-screw extruder via a precision meter, further adding the short glass fibers into the extruder via the meter after the materials in the extruder are softened, then melting, extruding and granulating, wherein the extrusion temperature is 200-220 DEG C. The bonding force between the polypropylene and a glass fiber interface is strong, and the product has the advantages of excellent mechanical performances, no obvious surface fiber revealed phenomenon, excellent heat aging resistance and excellent anti-copper toxicity performance; furthermore, the product almost has no loss of the mechanical performances when baking in a baking oven at 150 DEG C for 1000h.

A sizing agent for carbon fiber comprising either a component (A) and a component (B), or alternatively, a component (A'), a component (B') and a component (D), each of which is described below. Component (A): an epoxy compound with at least 1 epoxy group within each molecule, and with a surface energy of 17 to 34 mJ/m<2>; component (B): an epoxy compound with at least 1 epoxy group within each molecule, and with a surface energy of at least 35 mJ/m<2>; component (A'): an epoxy compound with at least 2 epoxy groups within each molecule, and with a surface energy of 17 to 34 mJ/m<2>; component (B'): an epoxy compound with at least 2 epoxy groups within each molecule, and with a surface energy of at least 35 mJ/m<2>; and component (D): an anionic surfactant with an aryloxy group as a hydrophobic group, with an ammonium ion as a counter ion, and with an alkylene oxide addition quantity of no more than 10 moles.

The invention relates to a preparation technology of wood-plastic composite materials and particularly relates to a method of preparing a wood-plastic composite material with modified wood powder and waste plastic. The method includes the steps of (1) crushing, milling and drying agricultural and forestry wastes, successively adding three different surface modifiers and successively mixing the surface modifiers with the waste powder in a high-speed mixing machine to prepare a modified waste powder; (2) cleaning the waste plastic, crushing the waste plastic into granules being 2-12 mm in size, and drying the granules; and (3) according to weight percentage ratio, feeding a mixture composed of the modified waste powder, the waste plastic granules, a lubricant, a foamer and a foamer aid into the high-speed mixing machine to perform high-speed mixing, cooling the mixture until the temperature is lower than 55 DEG C and discharging the material to prepare a special premix. The composite material is very high in strength and anti-bending and anti-impact performance, wherein the anti-impact strength is significantly improved so that the composite material is greatly improved in processability, and further can be used for producing products satisfying different demands. The composite material is greatly wide in application range.

The invention belongs to the preparation field of shape memory polymers, specifically discloses a liquid crystal epoxy resin-carbon fiber composite material with shape memory properties and a preparation method thereof. The preparation method of the liquid crystal epoxy resin-carbon fiber composite material comprises three steps: (1) carbon fiber surface treatment; (2) composite material mixture preparation; and (3) curing for forming. According to the preparation method, carbon fiber is used for modifying of liquid crystal epoxy resin with branched chains, the cost can be reduced, and the thermodynamic properties of the material can be improved; and the liquid crystal epoxy resin-carbon fiber composite material prepared by the preparation method has the shape memory property, is high in response rate, is high in recovery stress, and can be applied to the technical field of biomedicine, aerospace and other sciences.

The invention discloses a preparation method of a jute fiber reinforced polylactic acid composite material. The method is characterized by comprising the following steps: pulverizing fibers, scouring, carrying out silicon dioxide sol treatment, and preparing a modified jute fiber reinforced polylactic acid composite material. According to the method disclosed by the invention, the fibers are pulverized and then are modified, so that uniform scouring is facilitated; meanwhile, the production of hydrophilic cross sections caused by interruption during mixed granulation of the fibers and polylactic acid can be effectively reduced, so that the dispersibility and the interface compatibility of the fibers in the polylactic acid are improved; through silicon dioxide sol surface modification treatment, a rough hydrophobic surface is obtained; therefore, the hydrophobic surface and a polylactic acid (PLA) interface have good compatibility, and a good mechanical nail-anchor effect can be produced, thereby improving the interface bond strength.

The invention provides a polyurea coating, a preparation method and the application thereof, and a polyurea coating layer. The polyurea coating provided by the invention comprises the following components: a component A, a component B and a nano slurry; the component A is prepared from raw materials including diisocyanate and polypropylene glycol; the component B comprises polyoxypropylene diammonium, diethyl maleate, a dispersant, a leveling agent and a defoaming agent; the nano slurry comprises nano silicon dioxide and an accelerator; the mass ratio of the component A to the component B is 1to 1-4; and the mass ratio of the component B to the nano slurry is 1 to 2.5-6%. The polyurea coating and the polyurea coating layer provided by the invention have good wear resistance, adhesive force, 60-degree gloss, flexibility, salt fog resistance and artificial accelerated aging performance, wherein the salt fog resistance is more than or equal to 1000h.

A sacrificial anticorrosion water epoxy paint composition contains water-dispersive basic epoxy resin, multi-metal alloy powder, water-soluble solidifying agent prepared from polyamine and polyol, and rheologic nano assistant. Its advantages are high stability, excellent anticorrosion and mechanical performance of its film, and no release of harmful gas.

The invention relates to an amphoteric composite forward osmosis membrane. According to the amphoteric composite forward osmosis membrane, an adopted porous support membrane is a super-hydrophilic polyvinylidene fluoride membrane; a polyamide layer is formed on the porous support membrane, and a zwitterionic layer is formed on the polyamide layer. In the present invention, the zwitterionic layer is formed by amido groups through zwitterionic reaction; through cooperation with the super-hydrophilic characteristic of the polyvinylidene fluoride membrane prepared through water vapor induced phaseseparation, the strong hydration and the charging performance of a catechol derivative modified graphene oxide nano-water channel and the zwitterionic skin layer, the water flux of the composite forward osmosis membrane is greatly improved while a low back-mixing salt flux is kept.

The invention discloses a unidirectional heat transfer flame retardation PTC macromolecule self-limiting temperature electrothermal film. The electrothermal film comprises: a reflecting layer, a first insulating layer, a macromolecule PTC conductive woven layer, a second insulating layer and a fire-retardant layer, wherein the reflecting layer, the first insulating layer, the macromolecule PTC conductive woven layer, the second insulating layer and the fire-retardant layer are successively arranged from bottom to top. The macromolecule PTC conductive woven layer comprises: a woven bottom layer, a carbon black filling type polyvinyl PTC conductive fiber and a current-carrying strip. Raw materials of the carbon black filling type polyvinyl PTC conductive fiber comprise: polyethylene, an ethylene-vinyl acetate copolymer, carbon black and the like. A foaming flame retardation insulating layer is arranged under the reflecting layer. The electrothermal film of the invention possesses advantages of unidirectional heat transmission and the flame retardation. Usage performance is stable and a service life is long. In a preparation method of the invention, a three-roller calender is used toperform calendaring and combining, water cooling and rolling the each forming layer so as to obtain the electrothermal film. The method and a technological process are simple. Costs are low and the method is easy to realize.

The invention provides a fiber-reinforced nylon composite material and a preparation method thereof. The fiber-reinforced nylon composite material comprises the following raw materials in parts by weight: 60-80 parts of nylon, 10-20 parts of organosilicone modified polyester acrylate, 5-10 parts of aramid fibers, 20-30 parts of modified graphene, 4-8 parts of a flexibilizer, 0.6-1.8 parts of a compatilizer, 0.2-0.6 part of a lubricating agent and 0.2-0.6 part of an antioxidant. The modified graphene is mainly prepared from graphene, oxalic acid and sodium metaaluminate. The preparation methodcomprises the steps of mixing the raw materials in different batches; and then carrying out double-screw extruding and pelletizing. The nylon composite material not only has quite good heat-conductioneffect, but also can resist quite high temperature, and is also quite excellent in other mechanical properties.

The invention provides a high-heat conduction wear-resistant high-temperature resistant composite material and a preparation method thereof. The high-heat conduction wear-resistant high-temperature resistant composite material comprises the following raw materials in parts by weight: 60-80 parts of nylon, 10-20 parts of organosilicon-modified polyester acrylate, 1-3 parts of modified calcium sulfate whisker, 5-10 parts of magnesium oxide, 20-30 parts of modified graphene, 4-8 parts of a flexibilizer, 0.6-1.8 parts of a compatilizer, 0.2-0.6 parts of a lubricant, and 0.2-0.6 parts of an anti-oxidant. The modified graphene is mainly prepared by graphene, pimelic acid and sodium meta aluminate, and the modified calcium sulfate whisker is mainly prepared by the calcium sulfate whisker, zinc sulfate and an aluminate coupling agent. The preparation method is characterized in that the above raw materials are mixed by batches and are subjected to twin-screw extruded granulation. The nylon composite material has good heat conduction effect, high temperature resistance and antifriction performance, and other excellent mechanical properties.

The invention discloses a high-strength antistatic 3D sheet and a preparation method thereof. The preparation method of the 3D sheet comprises the following steps; (1) preparing a glue solution, and coating the surface of glass fiber cloth with the glue solution through an electrophoresis method to form a prepreg; (2) attaching a release film to the surface of the prepreg, slitting the prepreg into different shapes, stripping and removing the release film, and stacking the prepreg layer by layer to form a to-be-pressed prepreg; and (3) putting the prepreg to be pressed into a mold, and carrying out compression molding to obtain the high-strength antistatic 3D sheet. The glue solution comprises the following raw materials in parts by weight: 90-120 parts of resin, 24-48 parts of a curing agent, 15-17 parts of pretreated nano diamond powder, 2-5 parts of a cross-linking agent and 0.3-0.7 part of an antioxidant. The 3D sheet prepared by the invention has good mechanical strength, excellent antistatic property, heat dissipation property and heat resistance, and can be widely applied to cover plates and protective jackets of mobile phones, communication equipment and other electronic products.

The invention discloses a corrosion-resistant flexible epoxy resin root puncture-resistant waterproof composite material. The corrosion-resistant flexible epoxy resin root puncture-resistant waterproof composite material has the advantages that a copper-plating glass fiber is prepared by a chemical plating method, and is used as a reinforcing material and a root blocking agent, furan resin-modified flexible epoxy resin is used as a matrix, and the corrosion-resistant flexible epoxy resin root puncture-resistant waterproof composite material is formed by a vacuum casting or spraying forming technology; the mechanical strength is higher, the root puncture-resistant effect and waterproof effect are good, the acid and alkaline corrosion-resistant property is excellent, and the damage to the waterproof layer by the acid and alkaline corrosion of the soil at the planted roof can be avoided; by adopting the surface copper plating type, the usage amount of noble metal copper is greatly reduced, and the production cost is reduced; by adopting the vacuum casting and spraying forming types, the waterproof layer and the base layer of planted roof are integrated, and the flexible epoxy resin iscured and formed at normal temperature; the energy-saving, environment-friendly and green effects are realized, and the interface adhering to the concrete roof is strong.

The invention provides a spiral steel fiber ultra-high-performance concrete and a preparation method thereof. The concrete material is composed of cement, fine sand, water, quartz powder, high-efficiency water reducing agent and steel fibers, in addition, inorganic mineral admixtures such as fly ash, slag and the like can be selectively added to replace partial cement; and the adopted steel fiberscomprise a linear steel fiber and a spiral steel fiber. The concrete is prepared from, by mass, 1000-1300 parts of the cement, 100-300 parts of silica fume, 900-1200 parts of the fine sand, 100-300 parts of the quartz powder, 30-60 parts of the water reducing agent, 150-400 parts of the water and 50-300 parts of the steel fibers. The obtained spiral steel fiber concrete material has the advantages that compared with the adhesive property between the linear steel fiber and a concrete substrate, the adhesive property between the spiral steel fiber and the concrete substrate can be obviously improved, and the tensile strength of the spiral steel fiber ultra-high-performance concrete is higher than that of conventional steel fiber concrete; since the spiral steel fiber has an 'unspinning' process when being pulled out from the substrate, the deformation ability of the conventional steel fiber concrete can be greatly improved.

The invention provides a total heat exchange graphene paper film. The total heat exchange graphene paper film is prepared from plant fiber pulp, a high-molecular polymer, a flame retardant, an antibacterial agent and graphene water-based pulp, wherein the plant fiber pulp is imported softwood pulp or mixed pulp of imported softwood pulp and hardwood pulp, according to the graphene water-based slurry, the content of effective components is 5-15%, and the viscosity is 1000-6000 mpa.s, the raw materials further comprise at least one of polyacrylamide, cationic starch and sodium carboxymethyl cellulose, and the adding amount is 2-5% of the absolute dry fiber amount. The raw materials further comprise at least one of polyacrylamide, cationic starch and sodium carboxymethyl cellulose, and the adding amount is 2-5% of the absolute dry fiber amount. The mass ratio of the high-molecular polymer to the flame retardant is 1: (4-10). The air permeability of the total heat exchange graphene paper film is less than or equal to 0.2 mu m/Pa.s, and the moisture permeability is more than or equal to 1000g/m<2>. 24h.