33results about How to "Appropriate mechanical strength" patented technology

The invention provides fibers for tissue engineering bone repairing, a tissue engineering bone repairing scaffold and a preparation method thereof. The fibers for the tissue engineering bone repairing, provided by the invention, have a double-layered structure comprising an inner layer and an outer layer; the inner layer provides suitable mechanical strength for the whole fibers, and the outer layer can effectively maintain the activity and functionality of cells; the fibers for the tissue engineering bone repairing are applied to preparation of the tissue engineering bone repairing scaffold;the prepared tissue engineering bone repairing scaffold can be used for keeping the activity of the cells very well, has excellent rapid bone formation and blood vessel formation functions and has good mechanical properties.

The invention discloses an air positive electrode constructed by conductive gel particles and a lithium air battery. The air positive electrode is characterized by being of a full-solid structure and comprising particles with arbitrary shapes, wherein the particles are prepared from conductive gel, gaps are formed among the particles, electrons and ions can be simultaneously conducted by conductive gel, and the size range of the particle sizes of the particles is 10-500 microns; the particles are stacked to form a laminated structure, and the thickness of the laminated structure is 50 microns to 5 millimeters. A battery cell of the lithium air battery is of a multi-layer winding type structure or a multi-layer laminating type structure and is formed by winding and laminating a plurality of repetitive units, and each repetitive unit comprises the air positive electrode. A rapid gas dispersion channel is formed in the air positive electrode and can be prepared to be relatively thick, so that the problem that oxygen is difficult to diffuse is effectively solved, and the air positive electrode can be truly input into actual application.

An airbag apparatus includes a back-side cover provided at a roof side rail which is provided on a side of a roof of a vehicle and extends in a front-back direction of the vehicle, wherein the back-side cover is arranged on a side of the roof side rail, which faces an interior of the vehicle; an interior-side cover for covering a side of the back-side cover, which faces the interior; and an airbag contained in a case formed by the back-side cover and the interior-side cover. An easily-bending portion is formed in the middle of the back-side cover along vertical directions thereof, and the easily-bending portion bends when receiving a pushing pressure from the airbag which is deploying, and the airbag deploys toward the interior through a space between the back-side cover and the interior-side cover which open in accordance with the bending of the easily-bending portion.

The invention belongs to the field of biomedicine, in particular to a bionic II type collagen hyaloplasm acid compound sponge bracket for repairing cartilage in tissue engineering. The preparation method of the II type collagen hyaloplasm acid compound sponge bracket comprises the following steps of: extracting high-purity II type collagen solution; concentrating the II type collagen solution by means of a polyethylene glycol concentration method; gradually mixing hyaloplasm acid solution with the high-purity II type collagen solution by means of a partial homogenate method; and crosslinking the concentrated II type collagen hyaloplasm acid compound sponge with EDC and NHS dual cross-linking agent to obtain the II type collagen hyaloplasm acid compound sponge bracket. The II type collagenhyaloplasm acid compound sponge bracket can be taken as a tissue engineering implant, a cell culturing bracket material or medicine controlled release and the like for the prevention and the cure of the repair of the cartilage injury.

The invention belongs to the field of biomedicine, in particular to a bionic II type collagen hyaloplasm acid compound sponge bracket for repairing cartilage in tissue engineering. The preparation method of the II type collagen hyaloplasm acid compound sponge bracket comprises the following steps of: extracting high-purity II type collagen solution; concentrating the II type collagen solution by means of a polyethylene glycol concentration method; gradually mixing hyaloplasm acid solution with the high-purity II type collagen solution by means of a partial homogenate method; and crosslinking the concentrated II type collagen hyaloplasm acid compound sponge with EDC and NHS dual cross-linking agent to obtain the II type collagen hyaloplasm acid compound sponge bracket. The II type collagenhyaloplasm acid compound sponge bracket can be taken as a tissue engineering implant, a cell culturing bracket material or medicine controlled release and the like for the prevention and the cure of the repair of the cartilage injury.

New ampholyte biomaterial compounds containing ampholyte moieties are synthesized and integrated into polymeric assemblies to provide hydrophilic polymers exhibiting improved biocompatibility, haemocompatibility, hydrophilicity non-thrombogenicity, anti-bacterial ability, and mechanical strength, as well as suitability as a drug delivery platform.

The invention relates to the technical field of novel materials, and in particular relates to a method for preparing a chitosan / hyaluronic acid / gelatin crosslinked composite porous stent. The method uses chitosan, hyaluronic acid, gelatin and other natural biological materials as raw materials and dialdehyde starch as a crosslinking agent, and combines a lyophilisation method and a particulate leaching method to prepare the chitosan / hyaluronic acid / gelatin crosslinked composite porous stent, which is excellent in mechanical performance and made of a pure natural biological material. The chitosan / hyaluronic acid / gelatin crosslinked composite porous stent prepared by the method has the characteristics of high porosity, high pore strength, large pore diameter and the like, the pore diameter is 100-300 mu m, and the porosity is more than 90 percent. The stent is of an opening pore structure with small pores in large pores, and is suitable for cell implanting on the surface of the composite stent. Compared with a chitosan stent, the crosslinked composite porous stent has a better mechanical performance, proliferation and differentiation of cells on the surface of the composite stent can be more favored, and the compatibility of the composite stent to biological cells is excellent.

The invention relates to an injection moldable bone repair composite material and a preparation method and a using method thereof. The composite material is a powder material consisting of a copolymer of multiple amino acids and a sulfate component of calcium, the sulfate component of the calcium accounts for 60-95% of total weight of the component material, and the balance is the copolymer of the multiple amino acids. The sulfate component of the calcium comprises alpha-hemihydrated calcium sulfate which accounts for 15%-60% of the total weight of the composite material and the balance of other sulfates of the calcium. The copolymer of the multiple amino acids is formed by polymerizing epsilon-aminocaproic acid and at least two types of other amino acids, and the molar ratio of each amino acid in the other amino acids is not less than 1% of the total weight of the amino acids. When in preparation, an intermediate parent body is obtained by in-situ polymerization and composition of other sulfates of the calcium and the amino acid monomers under inert gas protection and heating, and the composite material is prepared by smashing and then being composed with the alpha-hemihydrated calcium sulfate. The composite material powder is mixed with curing liquid, and then the composite material can be used by injection. The composite material can be fast molded after the injection and has the strength which is equivalent to that of cancellous bone, good biocompatibility and adjustable degradation speed, thereby being applicable to fixation and repair of clinical orthopedic complicated and irregular traumas.

The invention provides a self-adhered type anti-neutron composite shielding material as well as a preparation method and application thereof. The shielding material is prepared from the following raw materials in parts by weight through radiation pre-crosslinking treatment: 100 parts of a rubber susbtrate, 5-50 parts of a tackifying agent polymer, 10-100 parts of a reinforcing agent, 20-200 parts of an anti-neutron additive, 0-50 parts of a softening agent, 0.5-10 parts of a vulcanizing agent, 0.5-5.0 parts of a vulcanization promoter, 0.5-10 parts of a vulcanization activator and 0-5.0 parts of an anti-aging agent. The invention further provides a preparation method of the shielding material and application of the shielding material in complex equipment or irregular parts. The self-adhered type anti-neutron composite shielding material provided by the invention has certain initial crosslinking degrees and self adhesion properties, is good in shape flow property, can be cured by self after being shaped, and has appropriate mechanical strength.

The invention relates to a degradable bioprosthetic valve system which is implanted in high elasticity external stent through conduit, preparation thereof and application thereof. The degradable bioprosthetic valve system comprises a round tube external stent, and a valve is cut and seamed in the external stent. The preparation comprises winding and braiding degradable polylactic acid fiber to form a round tube netted external stent, and fixing the round tube netted external stent on a mould; thermohardening; and cutting a bioprosthetic valve and seaming the bioprosthetic valve in the external stent. The application is that the external stent clings to the blood vessel wall after the bioprosthetic valve is implanted through a conduit, the external stent gradually degrades after being covered and wrapped with intima, the periphery of the valve gradually clings to the blood vessel wall, and the bioprosthetic valve firmly clings to the blood vessel wall after all the external stent degrades. The degradable bioprosthetic valve system can be implanted and is degradable, the bioprosthetic valve can be totally adhered to the blood vessel wall, so the degradable bioprosthetic valve system has good prospect on clinical application.

The invention provides a self-adhesion gamma-ray rubber composited shielding material and a preparation method and application thereof. The shielding material is prepared from, by weight, 100 parts of rubber base material, 5-50 parts of tackifying polymer, 10-100 parts of reinforcing agent, 10-200 parts of anti-gamma function assistant, 0-50 parts of softener, 0.5-10 parts of vulcanizing agent, 0.5-5.0 parts of vulcanization accelerator, 0.5-10 parts of vulcanizing activator and 0-5.0 parts of anti-aging agent. The invention also provides a preparation method of the shielding material and application of the shielding material in complex equipment or irregular parts. The prepared gamma-ray rubber composited shielding material has a certain degree of initial crosslinking and self-adhesion, has good shape-following property and can be self-curing after forming.

The invention provides an LED lamp filament. The LED lamp filament comprises an LED lamp filament base and a flexible glass film, wherein the LED lamp filament base comprises a lamp filament base anda plurality of LED chips, the plurality of LED chips are arranged on the lamp filament base, the lamp filament base comprises a cylindrical base, a plurality of grooves are formed in an outer surfaceof the lamp filament base, the LED chips are arranged in the grooves of the lamp filament base, the LED chips radially distributed on an outer wall of the lamp filament base are electrically connected, the flexible glass film is coated on surfaces of the grooves in a seamless way, the flexible glass film is a flexible fluorescent glass film, glass powder, fluorescent powder and graphene are contained in the flexible fluorescent glass film, and the weight ratio of the glass powder, the fluorescent powder and the graphene in the flexible fluorescent glass film is (5-6):1:(0.1-0.5).

The invention relates to a preparation method of a modified polystyrene board. The preparation method comprises the following steps: (1) mixing thermosetting resin with a flame retardant to obtain a binding material; (2) uniformly mixing polystyrene foaming particles with the binding material to obtain a formed material; and (3) adding a curing agent into the formed material, carrying out mixing,and then carrying out mechanical pressurizing forming to obtain the modified polystyrene board. According to the invention, a conventional method of modified polystyrene board secondary foaming and water vapor forming is replaced by the method combining phenolic resin foaming binding with mechanical pressurization, so that the process is simple, polystyrene board wastes can be effectively utilized, zero pollutant emission can be realized, waste polystyrene beads which are difficult to treat are consumed, the cost is reduced, and the environment-friendly process is realized. In a preferable technical scheme, a foaming agent is added into the binding material, so that phenolic resin can be foamed, and the polystyrene board becomes more compact with the matching of mechanical pressure, so that the board has higher strength and heat-preservation performance.

The invention relates to a medical composite material, in particular to a PVA fiber, polyamino acid and hydroxyapatite composite bone support material and a preparation method thereof. The invention provides a composite bone repair material which is composed of the following raw materials in percentage by mass: 20-50% of calcium phosphate, 15-30% of polyvinyl alcohol fiber, 20-55% of a polyamino acid polymer and 1-5% of a coupling agent. The PVA fiber, polyamino acid and calcium phosphate composite material obtained by the invention has high strength, high toughness and high elastic modulus. Asupporting-type bone repair implant can be prepared through rapid injection molding or hot press molding, the bending strength of the obtained supporting-type bone repair implant is 120-160 MPa, thebending modulus is 5-15 GPa, the compression resistance strength is 120-180 MPa, and the biomechanical property is close to that of human bone tissues.

The invention relates to the technical field of new materials and relates to a preparation method of a crosslinked chitosan / hyaluronic acid compound porous scaffold. According to the preparation method, natural biological materials such as chitosan and hyaluronic acid are used as raw materials and an organic silane coupling agent KH-560 is used as a crosslinking agent, and the crosslinked chitosan / hyaluronic acid compound porous scaffold which is made of purely natural biological materials and is excellent in mechanical property is prepared adopting a freeze-drying method. The crosslinked chitosan / hyaluronic acid compound porous scaffold prepared by adopting the preparation method has the characteristics of high porosity, high pores strength, large pores diameter and the like, is of an open type pore structure that small pores are contained in large pores, and is suitable for planting cells on the surface of the scaffold, wherein the pore diameter is 100-300 mu m and porosity is more than 90%. Compared with a chitosan scaffold, the crosslinked chitosan / hyaluronic acid compound porous scaffold has the advantages that the mechanical property is better; proliferation and differentiation effect of the cells on the surface of the porous scaffold is better due to the addition of the organic silane coupling agent, and affinity to biological cells is better.

The invention belongs to the technical field of building material, and provides a cement-based microporous building material. According to a preparation method, a cement-based mixed material containing uniform micro bubbles is formed through the physical and chemical reactions among wheat straw powder, cement, and a composite fibrous material, and the effect of applied external mechanical force instirring process. The cement-based mixed material can be used for manufacturing building products with relatively low volume density, low heat conduction coefficient, appropriate mechanical strength,and excellent thermal performance, and can be used for producing microporous building material products with a density ranging from 1200 to 1300kg / m<3> and compressive strength ranging from 8 to 15MPa.

The compounds of glass frame are: (mol%) CaO 24-45, SiO2 34-50, Na2O 0-25, P2O5 5-17, MgO 0-5 and CaF2 0-1. Volume percentage of porosity is 40-80, aperture is 50-600 um. Biological active glas powder produced by melting method is used as raw material, adding organic or high polymer pore-forming agent with different granularities in, cellular material biscuit is formed by dry pressing or gel injection molding after mixing, the biscuit is roasted on proper raising temp. to produce degradated cellular biological active glass frame that mechanics strength, prosity and hole size can be controlled. There is hydroxyl kietyoite generated on surface of said frame after the frame is steeped in human body analog humor, it has good biological activity and can be used as hard tissue defect repairing material and cell frame material for in vitro bone tissue cultivating.

The invention relates to a medical composite material, in particular to a PVA fiber polyamino acid hydroxyapatite composite bone support material and a preparation method thereof. The invention provides a composite bone repair material. The bone repair material is composed of polyamino acid polymer, polyvinyl alcohol fiber, calcium phosphate salt and coupling agent, and the mass ratio of each raw material is: calcium phosphate salt 20% to 50%, poly Vinyl alcohol fiber 15-30%, polyamino acid polymer 20-55%, coupling agent 1-5%. The PVA fiber polyamino acid calcium phosphate composite material obtained in the present invention has high strength, high toughness and high elastic modulus, and can be made into a supporting bone repair implant by rapid injection molding or hot pressing molding, and the obtained supporting bone repair implant The bending strength of the material is 120-160MPa, the bending modulus is 5-15GPa, the compressive strength is 120-180MPa, and its biomechanical properties are close to those of human bone tissue.

A sliding member for vehicular suspension includes a wear resistant layer having appropriate mechanical strength and high designability on its outer peripheral sliding face and a method for producing the same. On an outer peripheral sliding face of the sliding member for vehicular suspension, a colored wear resistant layer formed by an ion plating method and having a film thickness of 0.75 μm or more and 10 μm or less is included; and in the wear resistant layer, a dark blue titanium oxide layer, a titanium intermediate layer, and a colored titanium oxide layer are laminated in this order from the inner peripheral side toward the outer peripheral side.

The invention relates to a bionic artificial skin, comprising a protective layer, an epidermis and a dermis, characterized in that the protective layer is composed of a non-degradable or slowly degradable polymer film containing micropores, and the epidermis is composed of a microporous structure Composed of biodegradable and absorbable biopolymers, the dermis is composed of biodegradable and absorbable biopolymer sponges. The protective layer has a waterproof and moisture-permeable function. The material of the epidermis is the same as that of the human epidermis, and has a microporous structure, which can make the artificial skin have oxygen and moisture permeability similar to that of human skin, and endow the artificial skin with a breathing function. The composition of the epidermis and dermis Capable of degrading, because the ingredients are close to autologous skin, the degradation products help to promote the regeneration of epidermal cells and fibroblasts. The invention also provides a preparation method of the bionic artificial skin.

The invention relates to the technical field of new materials and relates to a preparation method of a crosslinked chitosan / hyaluronic acid compound porous scaffold. According to the preparation method, natural biological materials such as chitosan and hyaluronic acid are used as raw materials and an organic silane coupling agent KH-560 is used as a crosslinking agent, and the crosslinked chitosan / hyaluronic acid compound porous scaffold which is made of purely natural biological materials and is excellent in mechanical property is prepared adopting a freeze-drying method. The crosslinked chitosan / hyaluronic acid compound porous scaffold prepared by adopting the preparation method has the characteristics of high porosity, high pores strength, large pores diameter and the like, is of an open type pore structure that small pores are contained in large pores, and is suitable for planting cells on the surface of the scaffold, wherein the pore diameter is 100-300 mu m and porosity is more than 90%. Compared with a chitosan scaffold, the crosslinked chitosan / hyaluronic acid compound porous scaffold has the advantages that the mechanical property is better; proliferation and differentiation effect of the cells on the surface of the porous scaffold is better due to the addition of the organic silane coupling agent, and affinity to biological cells is better.

The invention discloses a method for preparing a mooring cable for a large-length unmanned aerial vehicle, and belongs to the technical field of cables. The product is composed of a composite tin-plated copper conductor, an insulating layer, a central tensile element, an outer sheath layer and a woven reinforcing layer. The design and process optimization of the composite conductor structure and the reinforcing sheath layer can be adapted to mooring cables for unmanned aerial vehicles with an overhang height of 500 m or more. In the air at a high altitude of 500m or higher, the cable can not only meet a power transmission requirement of 2000V high voltage and a long-term current carrying capacity of 50A or more, but also can transmit data signals.

The invention provides a self-adhered type anti-neutron composite shielding material as well as a preparation method and application thereof. The shielding material is prepared from the following raw materials in parts by weight through radiation pre-crosslinking treatment: 100 parts of a rubber susbtrate, 5-50 parts of a tackifying agent polymer, 10-100 parts of a reinforcing agent, 20-200 parts of an anti-neutron additive, 0-50 parts of a softening agent, 0.5-10 parts of a vulcanizing agent, 0.5-5.0 parts of a vulcanization promoter, 0.5-10 parts of a vulcanization activator and 0-5.0 parts of an anti-aging agent. The invention further provides a preparation method of the shielding material and application of the shielding material in complex equipment or irregular parts. The self-adhered type anti-neutron composite shielding material provided by the invention has certain initial crosslinking degrees and self adhesion properties, is good in shape flow property, can be cured by self after being shaped, and has appropriate mechanical strength.

The invention discloses a high-capacity rechargeable nickel-metal hydride battery and a manufacturing method thereof, and belongs to the field of batteries. The high-capacity rechargeable nickel-metalhydride battery comprises the following materials of a battery positive plate, a battery negative plate, a positive tab, a negative tab, an electrolyte, an isolating membrane, a steel shell, a cap and a sealing ring. The battery positive plate is a nickel hydroxide positive plate, and the battery negative plate is a hydrogen storage alloy negative plate. The manufacturing method of the nickel-metal hydride battery in the scheme is simple in step and convenient to operate, the overcharge and overdischarge resistance of the battery can be more effectively improved in the overcharge and overdischarge reaction process, the use safety performance of the battery is greatly improved due to the excellent overcharge and overdischarge resistance, and the problems that a nickel-metal hydride batterymanufacturing process in an existing nickel-metal hydride battery manufacturing technology is very troublesome, so that the nickel-metal hydride battery production efficiency is lower and the safetyperformance is lower, is solved.

The invention relates to a preparation method of a 3D printing elastic polymer stent for articular cartilage repair. The preparation method is characterized in that a PCLA / PLGT blend polymer loaded with modified nano-hydroxyapatite and silk fibroin is prepared by normal-temperature 3D printing, and an elastic degradable joint repair implant is prepared. The material has proper elasticity and mechanical strength, and the modified n-HA and silk fibroin are added, so that the material has good biocompatibility, and the growth of cartilage fiber cells and osteoblasts can be promoted. The 3D printing technology enables the stent to be matched with a wound part in shape and thickness, and the preparation method is simple and suitable for personalized treatment.

The invention relates to the field of polyvinyl alcohol films, in particular to polyvinyl alcohol matte films, compositions and preparation methods thereof. The polyvinyl alcohol composition contains polyvinyl alcohol, a plasticizer, olefin-maleic anhydride copolymer microspheres, a lubricant and optional auxiliary agents; the plasticizer contains component A, component B and component C; the component A is one or more of glycerol, ethylene glycol, polyethylene glycol and pentaerythritol; the component B is magnesium chloride, magnesium nitrate, calcium chloride, copper sulfate and sodium acetate One or more; the component C is water. The present invention can make polyvinyl alcohol with a wide range of alcoholysis degree to be biaxially stretched into a film, and the obtained polyvinyl alcohol matte film has a matte effect, and also has suitable mechanical strength, surface wetting tension and Translucency.

Provided is an LED filament, comprising: an LED filament substrate, the LED filament substrate comprising a filament substrate and several LED chips arranged on the filament substrate, the filament substrate comprising a cylindrical substrate, an outer surface of the filament substrate being provided with several recesses, the LED chips being arranged in the recesses of the filament substrate, the LED chips radially distributed on the outer wall of the filament substrate being electrically connected; a flexible glass film, the flexible glass film being seamlessly coated on surfaces of the recesses, the flexible glass film being a flexible fluorescent glass film, the flexible fluorescent glass film containing a glass powder, a fluorescent powder and graphene, the weight ratio of the glass powder, the fluorescent powder and the graphene in the flexible fluorescent glass film being (5-6):1:(0.1-0.5).