60results about How to "Cross-linked stabilization" patented technology

The invention discloses mixed liquor for preparing an elastic hydrophobic carbon nano tube and graphene compound aerogel. The mixed liquor consists of the following components in parts by weight: 0.1to 15 parts of oxidized graphene, 0.01 to 9 parts of carboxyl carbon nano tubes, 0.0001 to 0.1 part of a cross-linking agent, 0.0005 to 0.5 part of an alkaline reducing agent and 2000 parts of deionized water. The method for preparing the carboxyl carbon nano tube and graphene compound aerogel from the components comprises the following steps: (1) preparing a homogeneous water solution of oxidizedgraphene, carboxyl carbon nano tubes, the reducing agent and polymers; (2) preparing a carbon nano tube and graphene hydrogel through one-step hydrothermal reduction; and (3) carrying out dialysis and soaking treatment, and after drying, obtaining the carbon nano tube and graphene aerogel. According to the aerogel prepared in the invention, the mechanical property of the aerogel is improved, thespecific surface area of the aerogel is increased, and the aerogel can be used in the fields of dye absorption, catalytic carriers, variable resistors and the like; the density is just 1.2 to 15.8 mg/cm<3>, the hydrophobic angle is greater than 90 degrees, and the compression rate is 10% to 80%; and due to hydrophobic property and selective adsorption of the aerogel, the aerogel can be widely applied to treatment of oily wastewater and organic matter wastewater.

The invention discloses a high-strength and abrasion-proof cable sheath material, which comprises the following components in parts by weight: 15 to 30 parts of nitrile rubber, 40 to 60 parts of chloroprene rubber, 10 to 15 parts of chlorinated polyethylene, 1.5 to 4 parts of zinc oxide, 1.5 to 4 parts of magnesium oxide, 0.8 to 1.5 parts of N,N'-m-phenylene dimaleimide, 0.5 to 2 parts of calcium stearate, 0.8 to 2.5 parts of accelerator 4010NA, 1.8 to 3 parts of paraffin, 35 to 44 parts of white carbon black, 20 to 25 parts of superfine talc powder, 12 to 14 parts of active kaolin, 2 to 4 parts of dicumyl peroxide, 0.7 to 1.4 parts of diallyl isocyanate, 2 to 4 parts of antimony trioxide and 4 to 6 parts of magnesium hydroxide. The high-strength and abrasion-proof cable sheath material is high in tear resistance and abrasion-proof performance and long in service life, and has good flame-retardant effects.

The invention belongs to the technical field of polymer material preparation, and particularly relates to cross-linking type shape memory polyurethane. During the preparation of the cross-linking type shape memory polyurethane (SMPU) with good shape memory performance in the invention, a silane coupling agent containing three alkoxys is introduced into end groups of a polyurethane prepolymer terminated by isocyanate groups; a polyurethane prepolymer terminated by silicon alkoxys is obtained through reactions; then a catalyst is added or not added into the polyurethane prepolymer terminated by silicon alkoxys; and SMPU with good shape memory performance is prepared by silicon alkoxy crosslinking; Through the control of the catalyst amount, SMPU with a dense structure or with a porous structure containing nanometer pores or micrometer pores is respectively prepared. The SMPU has a shape fixing rate (Rf) of not less than 90%, a shape recovery rate (Rr) of not less than 90%. The SMPU with a porous structure containing nanometer pores or micrometer pores has higher recovery response speed.

A process for preparing the raw dope for animal protein and acrylonitrile graft-copolymerized fibre includes such steps as purifying animal protein, dissolving in the aqueous solution of zinc chloride, regulating pH value, heating and denaturing, adding hydrogen peroxide to modify the side chain of amino acid, adding reducer to remove excessive oxygen, adding trigger, and graft copolymerization between acrylonitrile and animal protein under protection of N2 gas. Its advantages are use of animal leftover as raw material and low cost.

The invention discloses a bioprosthetic valve with anticoagulation and anti-calcification functions and a preparation method thereof. The method comprises the following steps: carrying out cross-linking treatment on a biological valve by adopting glutaraldehyde, and carrying out modification treatment by adopting hydrophilic molecules or hydrophobic molecules after cross-linking; or performing modification treatment on the biological valve by hydrophilic molecules or hydrophobic molecules, and then carrying out crosslinking treatment by glutaraldehyde; or performing at least one time of modification treatment on the biological valve by adopting hydrophilic molecules or hydrophobic molecules, then performing cross-linking treatment by glutaraldehyde, and finally performing at least one timeof modification treatment on the biological valve by adopting hydrophilic molecules or hydrophobic molecules. The biological valve prepared by the preparation method disclosed by the invention not only has good mechanical properties, but also has excellent anticoagulation and anti-calcification effects.

The invention discloses a method for preparing imitating cell outer-layer membrane structure coatings. The method comprises the followings steps: (1) dissolving binary copolymers expressed by a structural general formula (I) in anhydrous polar organic solvent in order to obtain solution in a concentration of 1 to 10 mg/mL; (2) allowing polymers to form a uniform coating on the surface of a modified substrate by a spraying or dip-coating method; and (3) drying the coating under vacuum, treating the obtained product in ammonia water in a weight-percentage concentration of 0.5 to 5.0 percent or saturated steam of volatile organic amine aqueous solution for 1 to 72 hours at the temperature of between 20 and 120 DEG C to obtain a cross-linked fixed hydrophilic surface of the imitating cell outer-layer membrane structure. The more hydrophilic, cross-linked and stable surface of the imitating cell outer-layer membrane structure can be obtained after the obtained product is treated in the ammonia water or the saturated steam of volatile organic amine aqueous solution.

The invention relates to an electrical stimulation and pH dual response antibacterial injectable hydrogel and a preparation method and application thereof, first, a chitosan-polyaniline copolymer is prepared by grafting polyaniline onto chitosan; the chitosan-polyaniline copolymer is prepared into a solution, and the solution is mixed with an oxidized dextran solution for crosslinking at 25-40 DEGC for 30-800 seconds to get the electrical stimulation and pH dual response antibacterial injectable hydrogel; the mass ratio of chitosan-polyaniline copolymer and oxidized dextran is (1-5): (1-8). The CP / OD hydrogel has dual response to electrical stimulation and pH, meets the demand for specific time administration and has excellent antibacterial properties.

An even and rapid interlayer adhering method for carbon fiber heat-insulating hard felt is provided and belongs to the technical field of novel materials. According to the method, through adjusting an adhesive formula in a process of preparing carbon fiber laminated heat-insulating hard felt, interlayer adhesion is rapid and even, the using amount of an adhesive is reduced, construction using is reduced, even coating of the adhesive among layers is ensured, and product cracking, layering and dreg falling phenomena are reduced. After high-temperature treatment, the qualified rate of interlayer adhesion is 98% or above, ash dropping among layers is obviously reduced, crosslinking of resin carbon and fiber carbon is firmer, and the felt is cleaner during a hearth using period. Cracking and layering phenomena caused by unevenness by artificial coating are greatly reduced. Construction time for each square meter is reduced from original 10 min to 1 min, thus greatly increasing the working efficiency. Labor intensity of workers and operation inconvenience are reduced. Product strength and density are well ensured.

The invention discloses a biocompatibility nanoparticle and an application thereof as a drug conveying carrier. The nanoparticle provided by the invention is shown in (a) or (b): the compound disclosed in the formula (I) of (a) is a shell layer, the compound disclosed in the formula (II) is core nanoparticle, and n1 is equal to 2-400; the compound disclosed in the formula (I) of (b) and the compound disclosed in the formula (III) are shell layers, the compound disclosed in the formula (II) is core nanoparticle, and n2 is equal to 2-400. The invention also provides the preparation method of the nanoparticle, the application and the decorated nanoparticle obtained by decorating the nanoparticle. The nanoparticle obtained by the invention has favorable biocompatibility and biodegradability, which is convenient for further ligand decoration; the nanoparticle is used for targeted conveying of drugs; and nanoparticle decorated by lactose can carry adriamycin to cause adriamycin to effectively enter abnormal cells of liver cancer tissues, so that the treating effect of the nanoparticle is superior to that of the adriamycin. The nanoparticle can be widely applied to the field of drug conveying nanometer carrier. Formula (I), formula (II) and formula (III) are as follows.

The invention provides ultra-light clay and a preparation method thereof. The ultra-light clay is prepared from the following raw material components in percentage by mass: 20%-50% of rubber powder, 45%-75% of water, 2%-5% of foaming powder and 1%-5% of glutaraldehyde. The ultra-light clay is prepared through the following steps: mixing the formula amount of water and glutaraldehyde firstly, adding the formula amount of foaming powder for mixing, and finally, adding the formula amount of rubber powder for mixing to obtain the ultra-light clay. Compared with traditional boron-containing ultralight clay, the provided ultralight clay is nontoxic and environmentally friendly, and has better aggregation stability.

The invention discloses a method for preparing a high-hardness heat-resisting cable sheath material. The method comprises the following steps: turning on an internal mixer and preheating to 55-60 DEG C; mixing chloroprene rubber in the internal mixer for 1-2 minutes; when the temperature ascends to 75-80 DEG C, feeding linear low-density PE resin and mixing to obtain a main ingredient, wherein the mixing time is 3-4 minutes; adding a plasticizer, activated kaoline, a calcium-zinc composite heat stabilizer, MBS resin and a vulcanization accelerator zinc oxide, evenly mixing, and then adding antimonous oxide, magnesium hydrate and white carbon black, and mixing; adding tetrasulfide double-pentamethylene thiuram and N,N'-meta phenylene bis maleimide, mixing for 40-55 seconds, and thining in an open mill for 3-4 times;, when the temperature of the material is 101-103 DEG C steadily, extruding in a screw extruder, so as to obtain the high-hardness heat-resisting cable sheath material. The high-hardness heat-resisting cable sheath material is high in hardness, heat-resistant, and long in service life.

The invention discloses application of targeted reduction response vesicular nanometer medicines in preparation of brain tumor treatment medicines. Reduction sensitive reversible crosslinking vesiclesbased on block polymers PEG-P(TMC-DTC), PEG-P(LA-DTC), PEG-P(TMC-DTC)-PEI, PEG-P(LA-DTC)-PEI, PEG-P(TMC-DTC)-Sp or PEG-P(LA-DTC)-Sp and targeting polymers with ANG as the targeting molecules can efficiently wrap small-molecular chemotherapy medicines, protein medicines and gene medicines sensitive to brain glioma cells. The medicine-carrying vesicles can efficiently permeate through a blood brainbarrier in vivo to enter tumor substances and can also rapidly release medicines after entering tumor cells to induce cell apoptosis. The system has the advantages that the process is simple, the carrier biocompatibility is good, the enrichment of medicines at brain tumor parts is remarkably improved, and the concentration of medicines in brain tumor cells is increased. By means of the system, medicines can be conveyed to brain glioma selectively and efficiently.

The invention relates to a parallel bundle-assembled overhead insulation cable and a production process thereof. The parallel bundle-assembled overhead insulation cable comprises compression conductors, the compression conductors are formed by twisting of circular carbon fiber yarns and irregular hard aluminum wires arranged at outer walls of the circular carbon fiber yarns, outer walls of the compression conductors are provided with insulating layers, the insulating layers are connected with connecting ribs, and the upper surfaces of the connecting ribs are provided with marking lines. The production process of the parallel bundle-assembled overhead insulation cable comprises wire drawing, wire twisting, extrusion molding, and crosslinking. The cable and the production process thereof are advantageous in that the production efficiency is high, the service lifetime is long, the overall cost is low, and the promotion is facilitated.

The invention relates to an automobile shift lever (1) with a shock absorbing device (2). The shock absorbing device plays a shock absorbing role when the reverse gear locking member (5) springs back to the locked position along the axial direction of the shift lever (1). For this purpose, the shock absorber (2) has a first rigid annular element (6) in the axial direction of the selector lever (1), which surrounds the selector lever (1) and has projections (7) distributed on the periphery in the axial direction . Furthermore, the damping device has a second rigid ring element (8) which has a recess in the area of ​​the projection (7) of the first rigid ring element (6). Radial steps (10, 11) are provided on the reverse gear lock (5) and the shift lever (1), and the two rigid ring elements (6, 8) are axially supported on the steps (10, 11) superior. A rubber elastic ring (12) is arranged between the first and second rigid ring elements (6, 8), and when the reverse gear lock (5) rebounds, it can The rubber is elastically deformed between the lug (7) and the groove (9) of the second rigid ring element (8).

The invention discloses a high-temperature-resistant asphalt composite waterproof coiled material and a preparation method thereof. The asphalt composite waterproof coiled material is prepared from the following raw materials in parts by weight: 40-50 parts of matrix asphalt, 10-13 parts of base oil, 10-15 parts of heat-resistant rubber and 20-30 parts of an anti-aging filler. The heat-resistant rubber and the anti-aging filler are prepared in the preparation process, and the heat-resistant rubber is crosslinked with asphalt, so the heat resistance of the heat-resistant rubber is greatly improved, and when the composite material is prepared from the heat-resistant rubber and the asphalt, the heat resistance of the asphalt is greatly improved, and the asphalt cannot be separated from the body along with the use of the waterproof coiled material; the anti-aging filler can shield ultraviolet rays, so the waterproof coiled material does not generate photochemical reaction under illumination, carboxyl and hydroxyl on the modified carbon fibers enable crosslinking of the modified carbon fibers and asphalt to be firmer, and the situation that after the waterproof coiled material is used for a long time, the anti-aging filler is separated from a body, and the anti-aging effect cannot be achieved is prevented; and due to the use of the carbon fibers, the service life of the waterproof roll is prolonged.

The invention discloses an anti-calcification biovalve material and a preparation method thereof. The method comprises the following steps: soaking a biovalve in an anti-calcification solution, and then putting the biovalve in a glutaraldehyde solution for continuous crosslinking; or soaking the biological valve subjected to glutaraldehyde cross-linking treatment in an anti-calcification solution;or soaking the biovalve in an anti-calcification solution, then putting the biovalve in a glutaraldehyde solution for crosslinking, and finally putting the biovalve in the anti-calcification solutionfor soaking. The biovalve prepared by the method disclosed by the invention not only has good mechanical properties, but also has an excellent anti-calcification effect.

The invention discloses a high-hardness flame retardant cable material. The high-hardness flame retardant cable material is prepared from the following raw materials in parts by weight: 20 to 30 partsof polyvinyl chloride resin, 17 to 28 parts of low density polyethylene, 10 to 20 parts of polycarbonate, 5 to 12 parts of ethylene propylene diene monomer, 6 to 11 parts of ethylene-vinyl acetate copolymer, 4 to 9 parts of maleic anhydride grafted polymer, 3 to 7 parts of aluminum hydroxide, 2 to 5 parts of zinc borate, 2 to 4 parts of antimonous oxide, 5 to 10 parts of modified kaolinite, 3 to8 parts of hydroxymethyl starch, 2 to 4 parts of a plasticizer, 1 to 3 parts of a lubricating agent, 2 to 4 parts of an ultraviolet light absorber, 1 to 4 parts of a cross-linking agent and 2 to 3 parts of a calcium-zinc compound heat stabilizer. The high-hardness flame retardant cable material has the advantages of scientific and reasonable formula, excellent flame retardancy and insulating property as well as excellent mechanical property.

The invention discloses an acid salt corrosion-resistant conductive coating, and relates to the technical field of conductive coatings. The acid salt corrosion-resistant conductive coating comprises the following raw materials of acrylic resin, gum dammar, gallium arsenide, dead sea mud, perovskite powder, cellulose acetate butyrate, brucite chopped fiber, diethylene glycol dibenzoate, dimethyl sulfoxide, snail mucus, an accelerant, a cross-linking agent and a coupling agent. The conductive coating provided by the invention has the advantages that the preparation is convenient, the construction property is excellent, the conductivity is good, environmental protection and durable property are realized, the electromagnetic shielding property is excellent and the application range is wide.

The invention discloses a carbon nano tube compounded polyimide film, which is prepared from the following components in parts by weight: 150 to 250 parts of polyimide resin polymer, 1 to 2 parts of fullerene, 0.1 to 0.2 part of rare earth oxide and 2.5 to 3.5 parts of modifier. The polyimide resin polymer is prepared from the following components with contents in percentage by weight: 0.5 to 3 percent of carbon nano tube, 1 to 3 percent of titanium pigment, 0.5 to 3 percent of nitride micro mist, 0.1 to 2 percent of modified kaolin, 0.1 to 2 percent of copper fluosilicate and the balance of polyimide resin. The carbon nano tube compounded polyimide film provided by the invention is excellent in mechanical performance and has the elongation at break, which is more than 40 percent; the thickness of the film is only 8 to 12 microns; the normal-temperature tensile strength is more than 180 MPa; the coefficient of linear thermal expansion is 20ppm/DEG C to 36ppm/DEG C and further, the carbon nano tube compounded polyimide film does not wrinkle and is high in flatness.

The invention discloses a polymer-surfactant dual-slug type profile control agent for a fractured oil reservoir and a use method of the polymer-surfactant dual-slug type profile control agent, and relates to the field of oil field practical chemistry. The polymer-surfactant dual-slug type profile control agent is injected into the fractured oil reservoir through a dual-slug mode, and according to a front slug, partially hydrolyzed polyacrylamide with three different molecular mass values is mixed to form compound polymers, an annexing agent is added into the compound polymers to form the profile control agent, and high-permeability areas of the fractured oil reservoir can be effectively blocked; and a rear slug is a compound surfactant, and is injected into the oil reservoir after the front slug conducts effective blocking, and the rear slug conducts surfactant flooding on medium-permeability areas and low-permeability areas of the oil reservoir to reduce the residual oil content in the oil reservoir and enhance an oil layer injectivity index. According to the polymer-surfactant dual-slug type profile control agent for the fractured oil reservoir and the use method of the polymer-surfactant dual-slug type profile control agent, through the mode of combining the double slugs, the heterogeneity of the oil reservoir is improved, a follow-up waterflood sweep efficiency is increased, an inert area of the fractured oil reservoir is prevented from forming, and thus the defects that a traditional oil production method is low in recovery efficiency and poor in economic benefit when being used on the fractured oil reservoir are improved.