95results about How to "With mechanical strength" patented technology

The invention provides a tissue engineering artificial skin and a preparation method thereof. The artificial skin comprises an epidermal layer and a dermal layer, wherein the epidermal layer material is made of collagen or a mixed material of collagen and chitosan; the dermal layer material is made of collagen or a mixed material of collagen and chitosan, hyaluronic acid, chondroitin sulfate, alginate or polyving akohol. The epidermal layer comprises a semipermeable film; the dermal layer comprises two layers of three-dimensional porous supporting structures with different porosities. The used collagen is end-free collagen, so that the problems of immune rejection, foreign body reaction, viral infection and the like of the artificial skin during application are solved. The invention further provides the preparation method for the tissue engineering artificial skin.

The invention relates to a modified polyformaldehyde supporting material for 3D printing and a preparation method thereof. According to the method, the modified polyformaldehyde supporting material is prepared from the following raw materials by weight percent: 80-100 percent of polyformaldehyde, 0-7 percent of surface active agent and 0-13 percent of packing, wherein the content of polyformaldehyde is smaller than 100 percent, and the content of the surface active agent and the packing is larger than zero; the raw materials are put in a plastic mixer and mixed for 1-2 minutes to obtain a premix, the premix is put in a single screw extruder or a double screw extruder for extrusion and wire drawing by controlling the diameter of wires at 1.75 mm, so that the modified polyformaldehyde supporting material for 3D printing is obtained. Compared with the prior art, the invention provides the novel application and novel development of the modified polyformaldehyde, the modified polyformaldehyde material prepared according to the method has the characteristic of dissolving in an acidic liquid or gas decomposition, and has certain mechanical strength through modification treatment.

The invention provides a preparation method of a cartilage regeneration scaffold material. The preparation method is characterized in that fresh skin at back, face or buttock of a dead animal is taken as a raw material and is subjected to treatment processes such as deep and low-temperature treatment, depilation, inactivation of virus, decellularization, structure remodeling, crosslinkage, freeze-drying, re-modification and sterilization, thus obtaining a finished product. The cartilage regeneration scaffold material prepared by the method disclosed by the invention can be used for promoting adhesion and growth of cartilage cells and promoting healing of articular cartilage injuries. The product belongs to a natural extracellular matrix ingredient which is beneficial to adsorption, proliferation and differentiation of the cells, also has a certain mechanical strength, can exist in the body for a long time in the form of a tissue filler, also has good tissue affinity and compatibility, and can be used for inducing cartilage cells to grow therein so as to rebuild the cartilage, promote the adhesion and growth of the cartilage cells, promote the healing of the articular cartilage injuries and restore articular defects, so the cartilage regeneration scaffold material is a novel regeneration scaffold material for effectively restoring articular cartilage defects.

The invention relates to a zirconium oxide-based porous composite material and a preparation method thereof. The zirconium oxide-based porous composite material comprises a zirconium oxide base body consisting of La2O3, Y2O3 and ZrO2 and reinforcement fibers buried in the zirconium oxide base body, wherein the zirconium oxide base body comprises 1-10mol% of La2O3, 0.5-5mol% of Y2O3 and the balance of ZrO2, totaling 100mol% of the sum of the molar ratios of La2O3, Y2O3 and ZrO3. The reinforcement fibers account for 10-45wt% of the zirconium oxide-based porous composite material.

The invention discloses a high temperature resistant ceramic polyurethane foam composite and a preparation method thereof. The composite comprises two components A and B, wherein the component A comprises 100 parts of polyether polyol, 33-40 parts of a foaming agent, 3-5 parts of a stabilizer, 0.8-1.2 parts of a catalyst and 20-40 parts of a fire retardant in parts by weight; the component B comprises 110-170 parts of polyisocyanates, and 180-230 parts of a compound inorganic component in parts by weight; and the compound inorganic component comprises a silicate mineral material, a low-melting-point fluxing agent, a high temperature pore forming agent and a high temperature expanding agent. The preparation steps of the composite comprises preparing the components A and B, mixing the components A and B, injecting the mixture into a mold to implement foam forming, taking out foam from a mold cavity, and placing the foam at the room temperature for 3.5-4.5 hours. The high temperature resistant ceramic polyurethane foam composite has the excellent properties of high temperature resistance and fireproofness, and is applied to the fields of heat insulation, thermal insulation, fire prevention and the like.

The invention belongs to the field of carbon material, and relates to a graphene-based carbon fiber high in strength and hydrogen storage capacity, and a preparation method thereof. The fiber main body of the graphene-based carbon fiber high in strength and hydrogen storage capacity is composed of graphene and amorphous carbon, wherein the weight amount of graphene accounts for 60 to 100% of the weight amount of the fiber main body; the fiber main body may also be loaded with carbon nanotube, the fiber main body, or the fiber main body and the carbon nanotube grows on the fiber main body are modified with metal particles; when the total weight amount of the graphene-based carbon fiber is taken as 100wt%, the content of the metal particles ranges from 0 to 30wt%, and the content of carbon nanotube ranges from 0 to 300wt%. The graphene-based carbon fiber is prepared through following steps: oxidized graphene based initial fiber is prepared through spinning of a spinning solution preparedthrough mixing of an oxidized graphene aqueous solution and a polymer solution based on solution spinning method, and the initial fiber is subjected to carbonization so as to obtain a finished product. The preparation method is simple; the performance is excellent; and the graphene-based carbon fiber can be taken as a hydrogen storage material, and can be used in the fields such as new energy automobile.

The invention discloses a highly wear-resistant, oil-resistant and fireproof coating and belongs to the technical field of coating. The highly wear-resistant, oil-resistant and fireproof coating is prepared from the following raw materials in parts by weight: 30-50 parts of epoxy resin, 30-50 parts of polyamide imide, 20-40 parts of polytetrafluoroethylene, 15-18 parts of chromic oxide, 3-5 partsof silane coupling agent, 20-30 parts of ceramic filler, 3-7 parts of melamine cyanurate, 6-8 parts of ammonium polyphosphate, 3-5 parts of zinc borate, 10-20 parts of starch, 0.5-1 part of light stabilizer, 1-2 parts of antifoaming agent, 0.1-0.5 part of preservative and 10-25 parts of water. The invention also discloses a preparation method of the highly wear-resistant, oil-resistant and fireproof coating, wherein the preparation method has the advantages of easiness in preparation, strong adhesive ability and integration of high wear resistance, oil resistance and fireproofing.

The invention discloses a preparation method of high strength antibacterial non-woven fabric. The method comprises the following steps: step one, adding 50 to 60 parts of polypropylene into a calcining furnace, increasing the temperature to 220 to 280 DEG C till polypropylene is completely molten, adding 10 to 20 parts of modified liquid, increasing the stirring rotate speed to 200 to 300r/min, stirring for 10 to 20min, then adding 5 to 10 parts of rice hull powder, and 1 to 4 parts of polytriazole resin, continuously stirring for 20 to 30min, and then adding 2 to 4 parts of lignin. The methodhas the advantages that polypropylene is taken as a base material, hemicellulose has excellent oxygen barrier property and oil resistance, methylcellulose has excellent mechanical property, the hemicellulose and the methylcellulose are cross-linked, the added nanometer titanium dioxide is taken as an antibacterial agent, and formed crosslinking modified liquid has tough and soft properties.

The invention discloses a silk ilk bracket as well as a preparation method and application thereof, and a three-phase silk ligament graft and a preparation method thereof. Firstly, silks are woven into a net-shaped bracket with a macroporous structure; then the net-shaped silk bracket is divided into three areas: A. a ligament area, B. a cartilage modification area and C. a bone modification area; ligament cells, chondrocyte and osteoblast are respectively planted in the areas A, B and C; the net-shaped bracket modified by the divided areas is rolled to form a cylindrical ligament graft with a physiological transition structure. The structure gradually transited from soft tissues to hard tissues effectively avoids the problem of stress concentration due to direct connection of the soft and hard tissues, solves the problem of weak biological fixation of the ligament graft-bone combination part in the existing single-phase tissue engineering ligament, and solves the problem that the seed cells cannot enter the deep part of the ligament in the traditional ligament weaving method; the ligament graft has the complete weaving structure, and solves the problem of weak connection between layers in the existing three-phase tissue engineering ligament.

The invention discloses a temperature-adjustable fabric based on a carbon nano tube and a preparing method of the fabric. The temperature-adjustable fabric comprises an inner structure layer and an outer structure layer. The inner structure layer comprises a carbon nano tube layer and a metal layer covering the carbon nano tube layer, and the infrared ray emitting rate of the metal layer is lowerthan that of the carbon nano tuber layer; the outer structure layer at least covers a first surface and a second surface of the inner structure layer, the first surface and the second surface are oppositely arranged in the thickness direction of the inner structure layer, and the outer structure layer has a pore structure and can allow infrared rays to pass through. The preparing method comprisesthe steps of depositing the metal layer on the surface of a carbon nano tube thin film to form the inner structure layer; at least covering the first surface and the second surface of the inner structure layer with the outer structure layer. According to the temperature-adjustable fabric, no other energy sources are consumed, the difference of the infrared emitting rates of the front and reverse directions of the inner structure layer is utilized, the temperature can be automatically adjusted according to the changes of the environment temperature, and meanwhile, the effect of heat preservation or cooling is achieved.

The invention relates to a bone tissue engineering composite porous scaffold material and a preparation method thereof, and belongs to the application field of biomedical material technology. The porous material comprises the components: 1.4-5.0 wt% of konjac glucomannan, 5.0-8.0 wt% of nano hydroxyapatite, and 1.0-2.0 wt% of chitosan; the porosity is 70-92 wt%, and the compressive strength is 0.14 MPa-0.75 MPa. A mixed sol is prepared by mechanical mixing of the three components in an alkaline environment, and then is subjected to curing, alkali removal, freeze drying and other process treatment to obtain a konjac glucomannan/nano hydroxyapatite/chitosan composite bone tissue engineering porous scaffold. The preparation method of the scaffold has the advantages of simple preparation process, simple use equipment, short product finishing cycle, lower cost and the like; and cell and animal experiments show that the konjac glucomannan/nano hydroxyapatite/chitosan composite bone tissue engineering porous scaffold prepared by the method has quite good tissue compatibility, good cell proliferation and obvious osteogenesis effect, is expected to realize industrial expansion production, and achieves clinical application.

The invention relates to a non-oxide porous diaphragm material for high-temperature batteries. The non-oxide porous diaphragm material for high-temperature batteries comprises TiB2, ZrB2, SiC, ZrC, TiC, BN, AlN, Si3N4, TiN or porous carbon, and the average particle diameter is 2 mu m. The preparation method of the material comprises the following step: carrying out normal-pressure sintering, hot pressed sintering or field-assisted sintering independently on the raw materials of the non-oxide porous diaphragm material or the combination of the raw materials of the non-oxide porous diaphragm material and raw materials of a diaphragm fixing material, thereby obtaining the non-oxide porous diaphragm material. The non-oxide porous diaphragm material provided by the invention has the advantages of stable performance, simple preparation method, low cost and the like, can effectively prevent short-circuiting and enhance the circulation efficiency and number, and can easily implement industrialization.

The embodiment of the invention provides a cell-assisted autologous fat transplant for injection and a preparation method thereof, and relates to the field of medical plastic and aesthetic surgery. The cell-assisted autologous fat transplant for the injection can increase the survival rate of autologous fat transplantation, and obviously improve the effect after fat transplantation. The cell-assisted autologous fat transplant for the injection comprises autologous fat particles, mesenchymal stem cell aggregations and autologous plasma PRP rich in blood platelets.

The invention discloses a high-temperature-resistant material, and particularly relates to the technical field of high-temperature-resistant materials. The high-temperature-resistant material comprises the following materials: white corundum, brown corundum, alumina micro powder, corundum powder, silica powder, chromium oxide powder, kyanite powder, liquid phosphoric acid with the solubility of 60 wt%, liquid aluminum dihydrogen phosphate with the solubility of 60 wt%, carbon fibers, quartz fibers, zinc oxide and potassium feldspar. The quartz fibers, a wear-resistant filler, a high-temperature-resistant filler, high polymer derivative-diisopropyl fumarate C10H1604 powder and zirconium powder are added and applied to the surface of any material to form the microporous high-temperature-resistant heat-insulating material, the microporous high-temperature-resistant heat-insulating material can be directly baked by flame at the temperature of 3000 DEG C, and the temperature of the protected material is only the temperature before laying; therefore, the problems that the quality of molten metal is wasted and lost due to the fact that low-temperature circulating water makes contact with high-temperature boiling molten metal due to breakage of a circulating water container, and explosion danger is caused are solved, and safe and low-cost heat insulation can be achieved.

The invention discloses an immune lipid-polymer hybridized nanoparticle biological chip and a preparation method and an application thereof in disease detection. The immune lipid-polymer hybridized nanoparticles are distributed on a chip in a form of a microarray. By taking a mixture of lipid and a polymer as a shell material, molecular probes with fluorescent labels are embedded thereinto. The immune lipid-polymer hybridized nanoparticles load various ligands on the surfaces. The biological chip can specifically capture exosomes in blood and is mixed with the same. Under the circumference of not damaging the exosomes, messenger RNAs and/or small molecular RNAs in the exosomes are detected and a fluorescence signal is generated, and meanwhile, the fluorescence signal is amplified. The chip disclosed by the invention has relatively high selectivity and sensitivity in detecting the exosomes containing one or a small amount of target RNAs in the early stage of cancers. Meanwhile, the biological chip has the advantages of being fast, simple, sensitive, high in selectivity, low in cost and the like, and can be used for molecular detection in the field of various diseases, biological and food safety and the like.

The invention provides a cement paste temperature control self-repairing microcapsule which is of a spherical particle structure, the microcapsule comprises a capsule core and a capsule wall wrapping the capsule core, the capsule core and the capsule wall are bonded through an adhesive layer, the adhesive layer is made of epoxy resin, the capsule core is made of a paraffin and alkane mixture, and the capsule wall is made of calcium carbonate. The invention further provides a preparation method of the cement paste temperature control self-repairing microcapsule. The cement paste temperature control self-repairing microcapsule prepared by the invention is simple in preparation process, can be industrially produced in batches, and is high in cleanness and environmental friendliness in the production process.

The invention discloses a metal-carbon nanotube foam composite material as well as a preparation method and an application thereof. The preparation method comprises the following steps: carrying out secondary deposition of amorphous carbon on original carbon nanotube foam to obtain a deposited carbon nanotube foam material, putting the deposited carbon nanotube foam material and a metal precursorinto a reaction chamber of chemical vapor deposition equipment, and distributing the metal precursor at the upstream of the carbon nanotube foam material; and heating the reaction chamber to 1050-1150DEG C, and then at least introducing a reducing gas into the reaction chamber to thermally reduce the metal precursor, thereby uniformly loading metal particles on the surface and inside of the deposited carbon nanotube foam material to obtain the metal-carbon nanotube foam composite material. The metal-carbon nanotube foam composite material disclosed by the invention has excellent shielding effectiveness, certain mechanical strength, flexibility and compression stability and low density, and has a wide application prospect in preparation of elastic electromagnetic shielding materials.

The invention provides a glass fiber reinforced silicone resin composite material. The glass fiber reinforced silicone resin composite material is composed of raw materials including, by weight part,20-80 parts of silicone resin, 5-50 parts of glass fiber, 10-50 parts of filling and 0.1-5 parts of coupling agent. The glass fiber reinforced silicone resin composite material is good in shaping andprocessing performance, achieves high flowing properties at above 130 DEG C and can be shaped and processed through compression moulding, injection moulding and the like and be particularly applicableto being shaped and processed into special-shaped structural components.

The invention discloses a novel preparation method for a plywood material, and relates to the field of plywood materials. The method comprises the steps of cooking of bamboo pieces, anti-corrosion treatment of bamboo pieces, drying of bamboo pieces and hot press molding for the plywood material, polyvinyl chloride is a high polymer material with thermoplasticity and is heated to the temperature above the melting point to be in a molten state, when the temperature is decreased to below the melting point, polyvinyl chloride is in a hard state, and certain mechanical strength is achieved; when being fully fused and flowing, polyvinyl chloride can uniformly permeates into the bamboo pieces, after hot pressing, good glue strength and good adhesive performance are achieved, and the mechanical performance of polyvinyl chloride is improved. Polyvinyl chloride film replaces a traditional adhesive, not only are the mechanical performance and good glue strength of the plywood material improved, but also VOC releasing of the plywood material can be effectively reduced, and the harm to the environment is reduced.