413results about How to "High composite strength" patented technology

The invention relates to a nano carbon material with a network structure consisting of polymer chains, in particular to a nano carbon sulfur composite material with a network structure suitable to be used in a secondary lithium sulfur battery anode and a preparation method thereof. The carbon sulfur composite material is formed by adopting the following steps of: introducing functional groups onto carbon particles by adopting the electric conductivity and the porosity of a carbon material and the reaction capacity of similar condensed aromatics of the carbon material and by means of an irreversible chemical reaction; introducing the polymer chains, wherein the polymer chains are stretched, bent and cross-linked on the surfaces of the carbon particles to form a cross-linked network structure; and compounding a sulfur element or a polysulfide (m is more than 2) containing -Sm- structure into the network structure to form the nano carbon sulfur composite material with the network structure. The carbon sulfur composite material has a rich cross-linked network structure, nano-scale network pores constrain the sulfur element or the polysulfide (m is more than 2) containing the -Sm- structure in the network, and the active substances are limited in a certain region to react, so that the composite material has predominant electrochemical performance.

There is provided a controller for a motor capable of changing the phase difference between two rotors that can prevent demagnetization of permanent magnets or the rotors. The motor has two rotors each having a permanent magnet and phase difference changing driving means for changing the phase difference between the rotors. The controller has a demagnetization determining means for determining whether or not demagnetization of the permanent magnets of the rotors occurs during operation of the motor, and rotor phase difference controlling means for controlling the phase difference changing driving means to change the phase difference between the rotors from a current phase difference to a phase difference that results in a higher strength of a composite field of the permanent magnets if the result of determination by the demagnetization determining means is positive.

A fastener and method for fastening structural members wherein the fastener comprises a metallic stem defining a shank extending between first and second ends, the stem defining a deformable first head at the first end of the shank, and a resin-fiber composite sleeve defining the second end of the shank. The sleeve defines an aperture longitudinally extending through the sleeve, and a portion of the sleeve has a cross-sectional dimension greater than a cross-sectional dimension of the aperture through the structural members. Tensile strength of the composite sleeve is increased by incorporation of a support washer into the composite sleeve and/or by substantially orienting the fibers of the resin-fiber sleeve composite in the longitudinal direction of the sleeve.

The invention relates to a carbon-sulfur-shell matter composite material having a network dual-core shell structure and a preparation method thereof. The carbon-sulfur-shell matter composite material has a carbon-sulfur-shell three layer structure, a central core (inner core) is nano carbon particles, sulfur elemental or a polysulfide containing-Sm-structure (m>2) is directly deposited on the nano carbon particles, or functional groups are introduced onto the nano carbon particles by use of polycyclic aromatic hydrocarbon like reaction capacity of the carbon material and through an irreversible chemical reaction, polymeric chains are introduced in, a crosslinked network structure is formed through stretching, bending and crosslinking of the polymeric chains on the surface of the nano carbon particles, the sulfur elemental or the polysulfide containing the-Sm-structure (m>2) is composited onto the crosslinked network structure to form a nano sulfur layer having a network structure, then a mono-core shell nano composite material having a network structure is obtained and is used as a second layer (outer core) of the carbon-sulfur-polymer composite material having the network dual-core shell structure, an outermost layer is a shell matter layer, electronic and/or ionic conductivity of the material are/is improved, dissolving loss of discharge products can be further inhibited, and structural stability of the material is improved. The material is suitable for positive poles of lithium sulfur batteries, and has a prominent effect on improvement of cycle stability of the lithium sulfur batteries.

The invention discloses a production method of an aluminum and copper composite metal band. In the method, the aluminum and copper composite metal band is manufactured by anaerobic continuous casting and rolling of semisolid aluminum or aluminum alloy and a solid copper band. In the production method of the invention, the anaerobic metallurgical combination of the solid copper band and molten aluminum is realized, the aluminum oxidization problem is solved, the combined strength is high, and the aluminum and copper bonding strength is more than or equal to 100MPa; the continuous casting and rolling of the copper band and the molten aluminum are adopted to produce the aluminum and copper composite metal band, so the production efficiency is greatly improved by scores of times and the product quality is stable; the produced aluminum and copper composite metal band retains the original surface quality of the copper band, has a uniformly-thick copper layer and can be deeply processed by cold rolling; and the copper band and the molten aluminum, which comprise different components, can be used, and products are diversified and widely applicable. The method has the advantages that: the production process of the copper and aluminum composite band is advanced and comprises a few working procedures; and the energy-saving, material-saving and economic effects are obvious.

The invention provides articles and methods for making such articles including a substrate coated on at least one region thereof with a layer of nanocomposites nano-cellulose materials and nanoparticles.

The invention discloses an aqueous composite adhesive and a preparation method thereof, and belongs to the field of high molecular materials. The adhesive is polyurethane/acrylate PUA composite emulsion, wherein based on the total weight of the PUA composite emulsion, the content of the polyurethane is 5 to 20 percent; the content of the polyacrylate is 25 to 45 percent; the content of water is 50 to 70 percent; and the solid content of the PUA composite emulsion is 30 to 50 percent. The preparation method comprises the following steps: preparing the aqueous polyurethane emulsion; preparing the aqueous polyurethane/acrylate PUA composite emulsion from the aqueous polyurethane emulsion; and finally, regulating the solid content of the aqueous polyurethane/acrylate PUA composite emulsion by using de-ionized water, and adding an antifoaming agent, a wetting agent and an antiseptic to prepare the aqueous composite adhesive. In the prepared aqueous PUA composite emulsion, emulsion particles have complex phase structures, a carbamic acid ester chain is knitted tightly with an acrylicacid chain at the molecular level, and the synergic effect between the two makes the performance of a coating better than that of a physically blended coating, so that the aqueous PUA composite emulsion has high performance and environmental protection property.

The invention provides a preparation method of an aluminum foil composite packaging material. The method comprises the following steps of: coating a solventless adhesive on a surface of a substrate, wherein the substrate is paper or a high polymer film, and the coating amount of the solventless adhesive is 2.4 -3.4 g/m<2>; compositing the substrate coated with the solventless adhesive with the aluminum foil with a composite tension of 75-85 N; rolling the obtained composite material; and curing the rolled composite material to obtain the aluminum foil composite packaging material. An experiment express that the coating amount of dry basis of 40g of food paper/Al/PE (polyethylene) composite film prepared by the method in the invention is 5.0 g/g/m<2>, the solvent residual amount is 0, the oxygen-resistance property can be 0.023 (g/g/m<2>.24 h), the moisture-resistance property can be 0.020 (cu.cm/g/m<2>.24 h.0.1 MPa), and the tensile strength can be 78 MPa.

The invention discloses a microcrystalline foamed wall block produced by use of tailings and a manufacturing method of the microcrystalline foamed wall block. According to the microcrystalline foamed wall block, a decorative surface layer is sintered on a tailing microcrystalline foamed base body manufactured by use of a tailing composite material at a high temperature. The manufacturing method comprises the following steps: (1) preheating, namely increasing the temperature to the range of 800-950 DEG C and preserving heat for 10-40 minutes; (2) integrated sintering, namely increasing the temperature to the range of 1000-1350 DEG C and preserving heat for 30-120 minutes; (3) annealing cooling, namely cooling to below 280 DEG C and then taking out of a kiln; (4) naturally cooling to below 100 DEG C and then performing mold stripping, thereby obtaining a microcrystalline foamed wall block board; naturally placing the microcrystalline foamed wall block board for more than 60 hours to eliminate stress, and then grinding or polishing, cutting and drying to obtain the microcrystalline foamed wall block. The microcrystalline foamed wall block has a plurality of functions of high strength, fire resistance, heat preservation and thermal insulation, moisture and water proofing, decoration, light weight, weathering resistance, environmental protection and the like.

The invention provides a polyethylene (PE) film and a preparation method thereof. The PE film sequentially comprises a composite layer, an intermediate layer and a heat-seal layer, wherein the composite layer comprises 25 to 40 weight percent of low-density PE, 25 to 40 weight percent of linear low-density PE and 33 to 45 weight percent of modified metallocene linear low-density PE; the intermediate layer comprises 25 to 50 weight percent of the low-density PE and 50 to 75 weight percent of the linear low-density PE; and the heat-seal layer comprises 28 to 35 weight percent of the low-density PE and 65 to 72 weight percent of the linear low-density PE. The invention also provides a cleaning solution packaging composite film and a cleaning solution packaging bag, wherein the cleaning solution packaging composite film is prepared from the PE film. Correspondingly, the invention also provides a preparation method of the cleaning solution packaging composite film which is prepared from the PE film. A product is packaged by the PE film provided by the invention, so the packaging bag has certain solvent resistance and excellent heat-seal performance, the relatively high sealing property and tensile strength of a material subjected to heat sealing are guaranteed, and the leakage resistance and falling resistance of the composite film which is prepared by the material are further improved.

A carbon fiber tow composed of many carbon filaments and having a strand tensile strength of 3.8 to 5.5 GPa, a strand tensile modulus of 180 to 220 GPa and a carbon crystal size (Lc) of 13 to 18 Å. This carbon fiber tow can be produced by subjecting a precursor fiber tow composed of many polyacrylonitrile filaments which have a lightness difference (ΔL) of 50 or below and fineness of 1.1 to 1.7 dtex to oxidative stabilization and subjecting the stabilized fiber tow to carbonization with the maximum temperature within the range of 1,100 to 1,300° C. in an inert atmosphere while raising the temperature from 1,000° C. to the maximum temperature at a temperature rise rate of 100 to 2,000° C./min.

The invention relates to an ultrahigh molecular weight polyethylene/polyvinyl chloride composite pipe and a manufacture method thereof. The ultrahigh molecular weight polyethylene/polyvinyl chloride composite pipe is manufactured by compounding an ultrahigh molecular weight polyethylene inner pipe and a polyvinyl chloride outer wall, wherein the ultrahigh molecular weight polyethylene inner pipe comprises the following raw material components in parts by weight: (1) 100 parts of the ultrahigh molecular weight polyethylene with viscosity-average molecular weight larger than or equal to 1.5 million, 2.1-10 parts of polyvinyl chloride with the molecular weight of 2,000-10,000; and the polyvinyl chloride outer wall comprises 100 parts of polyvinyl chloride resin (PVC), 5-15 parts of impact modifiers, 0.5-8 parts of heat stabilizers, 0.07-1 part of lubricants and the balance of dyestuff. The invention provides an ideal ultrahigh molecular weight polyethylene/polyvinyl chloride composite pipe with friction resistance, corrosion resistance, high strength, creep resistance and firm fastening of the inner pipe and the outer wall and the manufacture method thereof with firm compound and low production cost. The invention is suitable for transporting corrosive, adhesive, high abrasive materials.

The invention provides a water-soluble self-crosslinking acrylic resin composition. The water-soluble self-crosslinking acrylic resin composition is prepared from the following raw materials in percentage by mass: 40-50% of acrylic acid and derivative thereof as well as non-acrylic carboxyl monomers, 20-40% of solvent, 8-15% of water, 0.5-1.5% of initiating agent, 0.03-0.4% of molecular weight regulator, 3-8% of neutralizing agent and 0.1-0.5% of crosslinking agent, wherein the acrylic acid and derivative thereof as well as non-acrylic carboxyl monomers contain 0.2-1% of monomers containing carbonyl structures, 2-5% of monomers containing ring structures, 0-2.5% of acrylic acid carboxyl monomers, 2.5-5% of non-acrylic carboxyl monomers and 2.5-5% of hydroxyl monomers. The invention also discloses a preparation method of the water-soluble self-crosslinking acrylic resin composition. The water-soluble self-crosslinking acrylic resin composition is low in monomer residual quantity, wide in molecular weight distribution and good in resin resolubility, and basically reaches an industrial 0.8N/15mm standard for the combined strength of OPP (oriented polypropylene) and PET (polyethylene terephthalate), so that the water-soluble self-crosslinking acrylic resin composition not only is suitable for PET composite packaging with compound printing ink printed in the OPP and low requirement for the combined strength, but also is suitable for paper printing.

The invention discloses a method for manufacturing multi-core MgB2 superconductive wires through the extrusion technology. The method includes the steps that first, precursor powder is prepared; second, the precursor powder is installed in a pipe to prepare a primary complex, and single-core wires are obtained through drawing machining; third, the precursor powder is installed in a pipe to prepare a secondary complex; fourth, the secondary complex processed through pre-heating seal welding is extruded, and multi-core rods are obtained; fifth, the multi-core rods are stripped and drawn to obtain multi-core wires, the multi-core wires are subjected to heat treatment, and then the multi-core MgB2 superconductive wires are obtained. According to the method, on the basis of a traditional power pipe-installing technology, a large single-pass machining deformation amount is adopted for manufacturing the multi-core MgB2 superconductive wires, in other words, the extrusion technology is adopted for manufacturing the multi-core MgB2 superconductive wires, because the secondary complex is in a very favorable three-dimensional stress state in extrusion, good metallurgical bonding will be achieved between different metal interfaces in the secondary complex along with the large extrusion deformation amount, the manufactured multi-core rods are high in composite strength, and the compactness and the yield strength of the multi-core MgB2 superconductive wires can be significantly improved.

The invention relates to a method for enhancing pulling-resistant and tensile-resistant capability of a soft and weak soil layer anchor rod/anchor rope. The method comprises the following steps: evenly stirring soil body and a solidifying agent in the soft and weak soil layer by using pile-forming equipment and grout injecting equipment, and forming a stirring pile; drilling holes at the positionof a central shaft in a stirring pile by using drilling equipment when unconfined compressive strength of the stirring pipe reaches 0.7MPa to 1.5MPa, and cleaning detritus in the holes; and placing the anchor rod/anchor rope rod body embedded with a grout injecting pipe into the bottom of the holes, and carrying out grout injection from the hole bottom to top to form the pulling-resistant and tensile-resistant anchor rod/anchor rope. The method solves the problem that the soil layer anchor rod/anchor rope can not be used in soft soil areas, solves a series of problems of slurry pollution, longconstruction period, complex technique, high cost and the like due to pile injecting by the use of the pulling-resistant drilling and solves the problems of easy corrosion and nondurability of a reinforced pile anchor.

A hot melt adhesive bonding fiber of the invention, which comprises at least one layer of thermal activation fiber cloth, which is interposed between a first layer of material and a second layer of material. The fiber cloth has a three-dimensional shape constituted by alternate protrusions and concaves, which is bonded with the first or second layer of material by hot-pressing, perfusion, or molding injection. The composite of the invention can be used for bonding all kinds of polyurethane materials with rubber (plastic) to strengthen the bonding intension.