1507results about How to "High modulus of elasticity" patented technology

The invention discloses a self-compaction filling paste body and a preparation process thereof, relates to a filling material with self-compaction performance for coal mine cut and fill mining and a corresponding proportion stirring process, and belongs to the field of construction materials. The self-compaction filling paste body is characterized by being prepared by uniformly mixing coal gangue, coal ash, cements, high-efficiency water reducing agent and water according to proper proportion, wherein the slurry concentration of the paste body is 75-85 percent; and in terms of mass percentage, the proportion of the coal gangue to the coal ash to the cements to the water reducing agent to the water is 45-55 percent to 15-20 percent to 10-15 percent to 3-5 percent to 15-25 percent. The paste body is high in flowability, stability and filling performance, low in bleeding rate and uniform and consistent in quality, and fully fills every corner of a worked-out section; the bleeding and the segregation of the aggregates are avoided; the convenience in transportation and control is achieved; a pipeline is not blocked during transportation; and original mine wastes are adopted for the paste body for realizing the filling so as to protect the environment.

A glass substrate used as a substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD, and a glass composition used to make such a glass substrate, contains the following glass ingredients: 40 to 70% by weight of SiO₂; 1 to 20% by weight of Al₂O₃; 0 to 10% by weight, zero inclusive, of B₂O₃; SiO₂+Al₂O₃+B₂O₃ accounting for 60 to 90% by weight; a total of 3.0 to 15% by weight of R₂O compounds, where R═Li, Na, and K; a total of 2.0 to 15% by weight of R′O compounds, where R═Mg, and Zn; and a total of 1.0 to 20% by weight of MOx (TiO₂+ZrO₂+Ln_xO_y), where Ln_xO_y represents at least one compound selected from the group consisting of lanthanoid metal oxides, Y₂O₃, Nb₂O₅, and Ta₂O₅. Here, the following condition is fulfilled: 0.070<(total content of R′O compounds)/(SiO₂+Al₂O₃+B₂O₃)<0.200.

The invention discloses a preparation method of polyacrylonitrile/graphene composite-based carbon fiber, which comprises the following steps: firstly preparing a polyacrylonitrile mixed solution uniformly dispersed with graphene through an in-situ polymerization method, and then employing the mixed solution as a spinning solution and obtaining a polyacrylonitrile/graphene composite protofilament by a wet spinning or dry-jet wet spinning process, and finally making the protofilament subject to a pre-oxidation treatment and a carbonization treatment to obtain the polyacrylonitrile/graphene composite-based carbon fiber. Compared with the existing polyacrylonitrile-based carbon fiber, the carbon fiber prepared by the method of the invention has a significantly increased mechanical property, and the carbonation yield in the preparation process is improved, therefore, the preparation method is an efficient and reliable preparation method with good application prospects.

The invention relates to an internal rib reinforcing outer ripple type plastic spirally twining structured wall pipe, which comprises a cylindrical surfaced pipe main body and a reinforcing rib wound outside of the pipe main body. The reinforcing rib contains an inner reinforcing rib vertical to the pipe wall, wherein the inner rib divides the reinforcing rib into two parallel hollow cavities. The upper part of the reinforcing rib and the top of the inner rib are both provided with a solid bulge. A method for manufacturing the plastic reinforcing pipe of the invention comprises the steps of: continuously extruding a plastic abnormal strip with two tubular bulges and containing a hollow cavity inside through a first plastic extruder, continuously, regularly, spirally twining the plastic abnormal strip on a formed roller in parallel, at the same time, extruding fused plastic gel in a clearance between adjacent side walls of the spirally wound plastic abnormal strip through a second plastic extruder, rolling two projected tubular cavities corresponding to two sides of the clearances connected by fusing the adjacent plastic abnormal pipe through a rolling wheel which is arranged at the corresponding part on the periphery of the formed roller with a slot structure, forming an outer projected reinforcing rib of the pipe outer wall by fusing the two tubular bulges, and extruding the residual fused gel in the clearance by the rolling wheel so as to form the solid bulge.

The invention relates to a high-strength glass fiber which has an excellent mechanical property and a product of the glass fiber. The high-strength glass fiber can serve as an ideal enhancing base material of a high-performance composite material and is applied widely in the fields of windmill blades, space shuttles and the like, which have high requirements for the specific strength and the specific elasticity modulus. The system is characterized in that calcinated aluminum oxide serves as on of the raw materials, impurities in glass compositions are reduced, the diathermancy of molten glass is improved, the energy consumption is reduced, and the stability of glass fiber drawing operation is improved greatly. The glass fiber with the compositions is required to be produced by direct drawing on a specific tank furnace, the electric boosting input energy of the tank furnace accounts for more than 20% of the total energy input, and more than 60% of the electric boosting energy is applied to raw material melting areas. The fiber mainly comprises 56-65 wt.% of SiO2, 18.5-25.8 wt.% of Al2O3, 11.5-23.0 wt.% of RO (RO is sum of CaO, MgO, SrO and BaO), 0.1-1.0 wt.% of CeO2 and 0.1-0.8 wt.% of Li2O.

The invention discloses a method for in-situ preparing antibacterial supermolecule aquogel. The method comprises the following operation steps: silver nitrate crystal and polyethyleneglycol-polypropylene glycol-polyethyleneglycol triblock copolymer solution are mixed and stirred to obtain mixed solution; the steps of stirring the mixed solution for 15 minutes and ultrasonically dispersing the mixed solution for 5 minutes are alternatively carried out for 2-4 hours to obtain nano silver sol; and the nano silver sol and Alpha-cyclodextrin solution are mixed, stirred and stands at the room temperature to obtain hydrogel. The hydrogel can be used for preparing injectable drug carriers. The invention has the advantages of simple operation, adjustable gel strength and the gelation time, room temperature forming, no involvement of chemical cross linking reaction and the usage of organic solvent, favorable biocompatibility and antibacterial property of obtained gel, and the like and is prospective to be widely applied in the field of biomedical engineering materials.

The invention relates to a concrete pavement material for heavy traffic roads and a preparation method thereof. The material is composed of a component A, a component B and a component C in a mass ratio of 1:(0.2-0.6):(4-8). The component A comprises the following components in parts by mass: 40-80 parts of epoxy resin, 0-20 parts of epoxy reactive diluent, 10-50 parts of elastic modifier, 0.2 part of defoaming agent and 0.2 part of dispersing agent. The component B comprises the following components in parts by mass: 100 parts of curing agent, 0-10 parts of curing accelerator and 1 part of coupling agent. The component C comprises the following components in parts by volume: 100 parts of fine stone, 30-300 parts of fine sand, 130-800 parts of waste rubber particle, 50-100 parts of waste rubber powder and 10-20 parts of crystal whisker. Compared with the prior art, the concrete pavement material for heavy traffic roads has the advantages of high strength, favorable durability, favorable roadability, energy saving, environment friendliness and the like, and is convenient for construction.

The invention relates to a self-heat-insulating fly ash autoclaved aerated concrete block which comprises the following components in parts by weight: 1400-2200kg of fly ash, 330-400kg of cement, 390-550kg of quicklime, 100-200kg of white lime, 50-100kg of desulfurized gypsum, 255-420kg of block waste, 2.15-2.90kg of aluminum powder paste and 0.20-0.50kg of foam stabilizer. According to the invention, the fly ash, desulfurized gypsum and excessive cut waste from a power plant are fully utilized, and meanwhile, the Level B04, Level B05, Level B06 and Level B07 self-heat-insulating fly ash aerated concrete blocks can be prepared. The block products contain a large amount of micro and macro pores, and are uniform in pore size, low in heat conductivity coefficient and favorable in self-heat-insulating property.

The invention discloses concrete with common strength and high elastic modulus and a preparation method thereof. The concrete with common strength and high elastic modulus, disclosed by the invention, is prepared from the following components in parts by mass: 100 parts of cement, 30-100 parts of an admixture, 1-10 parts of a nano material, 0.1-2 parts of a viscosity modifier, 200-600 parts of sand, 300-800 parts of crushed stones, 10-60 parts of fibers, 0.5-5 parts of a water reducing agent, 0.1-0.5 part of a powder dispersant and 50-90 parts of water. After the concrete with common strength and high elastic modulus, disclosed by the invention, is subjected to standard curing or natural curing for 28d, the strength grade of the concrete is C40-C50, and the elastic modulus can reach 50GPa or more; and the concrete has excellent working performance and endurance performance.

The invention discloses a sand texture type polyester/epoxy powder coating and a preparation method thereof. The sand texture type polyester/epoxy powder coating comprises the following raw materials, by weight, 350-400 parts of polyester resin (P5040), 240-280 parts of epoxy resin (E-12), 100-150 parts of extinction barium sulfate, 40-60 parts of spherical silica powder, 8-12 parts of modified polyethylene wax powder, 10-15 parts of organic coated titanium dioxide, 5-10 parts of sand texture agent (SWMBX-30), 4-6 parts of benzoin, 5-8 parts of 2-phenyl imidazoline, 4-6 parts of 2-methylimidazole, 5-10 parts of ferrite yellow, 5-10 parts of iron oxide red and 10-15 parts of carbon black. The prepared powder coating has the advantages of being high in hardness, high in intensity, high in abrasion resistance, good in heat resistance, good in ageing resistance, short in solidifying time, environment-friendly, free of pollution and the like. The solidified coating produces a texture effect of the sand texture, the sand texture is meticulous and clear, distribution is even, visual comfort is provided for people, and combination properties of the coating are good.

The invention discloses a high-dielectric elastomer composite material with low content of carbon nanometer tubes and a preparation method of the composite material and belongs to an elastomer composite material. The high-dielectric elastomer composite material contains the following components in parts by weight: 100 parts of elastomers, 0.5-10 parts of array carbon tubes, 0 or 0.5-12 parts of a vulcanizing agent, and 0 or 1-7 parts of a vulcanizing-assisting agent, wherein when the elastomers are rubber matrixes, the vulcanizing agent and the vulcanizing-assisting agent are needed; and when the elastomers are thermoplastic elastomer matrixes, the vulcanizing agent and the vulcanizing-assisting agent are not needed. The composite material is prepared by a mechanical blending method. The composite material with good dispersing performance is obtained by means of adding the array carbon tubes with a one-dimensional orientation arrangement structure, the dielectric constant of the elastomer can be enhanced greatly under the condition of a low stuffing content, simultaneously the modulus of the elastomer is not increased remarkably and a high ratio value of dielectric constant/modulus is obtained.

The invention discloses a preparation method of a full biodegradation film, which takes poly adipic acid/polybutylene terephthalate (PBAT) and starch as base materials, poly-epsilon carpolaction (PCL), epoxidized soybean oil (ESO), and phosphorous acid dialkyl ester as plasticizers, and montmorillonoid or calcium carbonate, talcum powder and the like as inorganic fillers. The method comprises the steps that modification and pelleting are performed in a twin screw; modified resin is added to a film blowing machine for film blowing; and the full biodegradation film can be obtained finally. The full biodegradation film produced by the method is better in physical characteristic, can be directly prepared into a film bag, and can serve as a daily-used packaging film, a waistcoat bag, a food packaging bag and the like; the preparation method of the full biodegradation film is simple in technology, and easy to control, and is suitable for industrial mass production; the film bag produced by the method is high in strength, can be biodegraded fully after use, and is easy to dispose; and environmental pollution is reduced.

The invention provides a preparing method for ultra-fine high-purity Ti2AlNb alloy powder. The preparing method comprises the following steps that 1, components of a Ti2AlNb base alloy are used as ingredients and smelted into a Ti2AlNb alloy bar; 2, finish turning is carried out on the smelted Ti2AlNb alloy bar, the diameter of a processed electrode bar ranges from 10 mm to 100 mm, and the length ranges from 100 mm to 1000 mm; 3, the electrode bar is loaded into a reaction chamber, the reaction chamber is vacuumized, and helium or argon or helium and argon mixed gas is introduced into the reaction chamber; 4, plasma gun powder of PREP powder manufacturing equipment ranges from 100 kW to 300 kW, a plasma torch comprises a tungsten cathode and a copper anode, the electrode bar is not used as an electrode, the end of the electrode bar is heated to be melted uniformly, atomized drops are tossed out from the end of the electrode bar, the drops are cooled fast in an inert gas environment to form spherical particles, and the spherical particles drop into a bottom collector of the reaction chamber; 5, prepared Ti2AlNb alloy powder is screened and packaged in the inert gas protection environment; 6, the Ti2AlNb alloy powder prepared through the method has the advantages of being ultra-fine, high in purity, high in spherical degree and low in oxygen content.

The invention discloses bridge coarse aggregate active powder concrete and a preparation method thereof. The coarse aggregate active powder concrete comprises, by weight, 100 parts of cement, 20-60 parts of blending materials, 2-10 parts of interface modifying agents, 60-120 parts of fine aggregates, 40-120 parts of coarse aggregates, 10-60 parts of fibers and 15-30 parts of water. Under conventional curing processes such as natural conditions, the coarse aggregate active powder concrete has super-high compressive strength, bending tensile strength and tensile strength and bonding strength andlow contraction performance and further has high elasticity modulus, anti-fatigue performance and durable performance and excellent construction performance, dead weight and shrinkage and creep influence of a bridge can be reduced, and the span, the structural stiffness and the bearing capacity of the bridge can be remarkably improved, and the service life of the bridge is prolonged.

A polyoxymethylene fiber which comprises a polyoxymethylene copolymer which exhibits a half crystallization time of 30 sec or more when it is cooled from the molten state at 200 DEG C to 150 DEG C at a cooling rate of 80 DEG C/min and then is held at 150 DEG C constantly. The polyoxymethylene fiber has a high strength and a high modulus of elasticity.

The invention discloses a preparation method of an organic and inorganic wood composite material, relating to the preparation method of a composite material and solving the problems that the wood composite material prepared by the traditional method has poor durability and mechanical property. The method comprises the following steps of: firstly, pre-polymerizing a monomer; secondly, preparing dilute sol; thirdly, impregnating the wood with the dilute sol under the vacuum-pressurizing condition; and fourthly, heating the impregnated wet wood to obtain the organic and inorganic wood composite material. The organic and inorganic wood composite material has higher strength-to-weight ratio; and compared with the wood, the hardness, the wearing resistance, the bending strength, the elastic modulus, the parallel-to-grain compressive strength and other mechanical properties of the organic and inorganic wood composite material are improved by 5 times to maximum extent; and the dimensional stability and the antiseptic property of the organic and inorganic wood composite material are improved by over 50-70 percent. In addition, the duality test shows that the thermal stability and the weather resistance of the organic and inorganic wood composite material are remarkably improved.