31results about How to "Meet the needs of different purposes" patented technology

The invention discloses a stent type silk fibroin film insoluble in water, and preparation and application of the stent type silk fibroin film. A preparation method includes the steps of placing silk fibroin solution in a smooth, flat and horizontal mold, and obtaining a basilar film by humid and heat crosslinking; and laying the silk fibroin solution on the surface of the basilar film and forming the stent type silk fibroin film insoluble in water after freezing, drying and humid and heat crosslinking. Silk fibroin is used as a raw material, and biocompatibility is good; a preparation process is non-toxic and environment-friendly, and the thickness of the film and the aperture of a stent layer are easy to control; the film is soft in a moist environment, the basilar film is compact, and cells, microorganisms and biomacromolecules cannot penetrate through the basilar film; the stent layer is in the shape of a porous sponge, and is beneficial to fixation of the film, hemostasis of a wound and regeneration of transmitting tissues; and the film has a wide market in the field of anti-adhesive films and artificial film patches.

A preparation method for poly-aluminum carbon silane relates to the poly-aluminum carbon silane. The preparation method which has simple technique, low cost and is suitable for preparing the poly-aluminum carbon silane of silicon carbide ceramic matrix composites by silicone carbide fiber, silicon carbide ceramics and PIP method and a device thereof are provided. The device is provided with a container, a condenser tube, a heating jacket, a tail gas collected container and a temperature controller. The container is respectively connected with an inert gas source, the condenser tube and the temperature controller. The condenser tube is connected with a vacuum pump and is provided with an inlet and an outlet; the condenser tube is connected with the tail gas collected container which is provided with a tail gas outlet. Aluminum acetylacetonate and liquid poly carbon silicon alky are put into the container for blending and stirring; the container is arranged on the heating jacket and is connected with the device for preparing the poly-aluminum carbon silane. Vacuum-pumping is carried out; inert gas is pumped in and inert atmosphere is used for continuously replacing air for at leasttwo times; condensed water is pumped in and increased up to 300-420 DEG C from the room temperature for reaction; after the reaction is over, the cooling is carried out to room temperature, samples are taken out, and so the poly-aluminum carbon silane is obtained.

The invention relates to a novel method for preparing a quartz needle by etching a capillary with hydrofluoric acid. Specifically, the polymer coating on the capillary tube to be etched is removed, then the capillary tube is fixed in the designed device (Figure 1), and a certain volume of hydrofluoric acid is added to etch the capillary tube until the capillary tube is etched and broken. The volatilization of hydrofluoric acid and the affinity with the quartz surface make the etched part of the quartz capillary form a conical surface. The method can be widely used in the preparation of quartz materials such as mass spectrometry electrospray needles and genetic engineering microinjection needles that need to control the outer diameter and the cone surface.

The invention discloses a three-dimensional woven fabric coated with multiple layers of emulsion strips. The three-dimensional woven fabric coated with the multiple layers of emulsion strips comprises warps, wefts and the emulsion strips, wherein the three-dimensional woven fabric consists of a plurality of repetitive tubular woven fabric units, wherein every two adjacent tubular woven fabrics are provided with a section of shared woven fabric; the tubular woven fabric unit is formed by weaving the warps and the wefts; and the emulsion strips are coated in the tubular woven fabric units by virtue of weaving. The three-dimensional woven fabric disclosed by the invention has the advantages of good integrity, structure stability, easiness for thickening, higher strength, higher compression resistance and favorable air permeability and water vapor permeability.

The invention belongs to the technical field of preparation of ceramic targets, and specifically relates to a manufacturing equipment for a composite ceramic target, including a bottom plate, a placement area 1, a weighing system, and a liquid-phase glue-forming system and a liquid-phase dry glue system arranged on the bottom plate. A solid-phase mixing system, a solid-phase forming system, and a hot-press sintering system; one of the placement areas is set at one end of the bottom plate, and two weighing systems are respectively set on the liquid-phase gelling system and the solid-phase mixing system; The manufacturing equipment of the composite ceramic target of the present invention can prepare the composite ceramic target, can control the product quality in real time, the product grade is high, the production cost is reduced, multiple preparation processes are carried out at the same time, the degree of automation is high, the production cycle is short, and the output is high. It is beneficial to mass production of composite ceramic targets. The equipment of the present invention can prepare composite ceramic targets of the same type with different qualities on both sides or different types of composite ceramic targets with different qualities on both sides to meet the needs of different customers for different purposes.

The invention discloses a stent type silk fibroin film insoluble in water, and preparation and application of the stent type silk fibroin film. A preparation method includes the steps of placing silk fibroin solution in a smooth, flat and horizontal mold, and obtaining a basilar film by humid and heat crosslinking; and laying the silk fibroin solution on the surface of the basilar film and forming the stent type silk fibroin film insoluble in water after freezing, drying and humid and heat crosslinking. Silk fibroin is used as a raw material, and biocompatibility is good; a preparation process is non-toxic and environment-friendly, and the thickness of the film and the aperture of a stent layer are easy to control; the film is soft in a moist environment, the basilar film is compact, and cells, microorganisms and biomacromolecules cannot penetrate through the basilar film; the stent layer is in the shape of a porous sponge, and is beneficial to fixation of the film, hemostasis of a wound and regeneration of transmitting tissues; and the film has a wide market in the field of anti-adhesive films and artificial film patches.

The invention provides a preparation method of crosslinking type aliphatic polycarbonate, and belongs to the technical field of high polymer materials. The crosslinking type aliphatic polycarbonate is prepared by using carbon dioxide, an epoxy compound and itaconic anhydride as terpolymers through one-pot polymerization. The crosslinking type aliphatic polycarbonate prepared by the method has good mechanical property, thermal property, degradation property and a very good application prospect in the fields such as biological medicines. Experiments prove that the crosslinking degree and the properties of the aliphatic polycarbonate can be effectively controlled by changing the addition amount of itaconic anhydride monomers in the polymerization reaction process or polymerization reaction conditions (temperature, time and pressure) so as to meet the requirements of different purposes.

The invention discloses a method and a post-treatment process for preparing high-temperature nickel-based alloy porous materials by a 3DP method. Mixing; B. Macroscopic direct pore creation: According to the shape characteristics, porosity, pore distribution law and pore shape and size design requirements of porous materials, a three-dimensional model of porous structure is designed through three-dimensional design software; C. 3DP method to prepare porous materials: 3DP The equipment receives the printing program, sets the printing parameters and starts printing; D. Removal of residual powder: first take out the rough powder from the powder pile, and then remove the residual powder on the rough base; E. Debonding and atmosphere sintering treatment: send the rough base to Go to the muffle furnace for debonding and atmosphere sintering; F, electrochemical corrosion: perform electrochemical corrosion treatment on the sintered nickel-based porous material; G, cryogenic treatment: put the workpiece into a cryogenic device for cryogenic treatment; H, The preparation and post-treatment of the high-temperature nickel-based alloy porous material are completed.

The invention relates to a water-soluble polyvinyl alcohol fiber and a preparation method thereof. The water-soluble polyvinyl alcohol fibers provided by the invention has the following natural parameters: the dry breaking strength of fibers is more than or equal to 5cN / dtex; dry breaking elongation rate is 10 percent to 20 percent; water solution temperature is 60 DEG C to 90 DEG C; single fibertiter is 1.0dtex to 8dtex; the number of crimp is 8 to 12 / 25mm. The invention conquers the imperfections of the existing method of long technique procedure and high production energy consumption caused by the redrying of fibers, furthermore, the property of the prepared water-soluble polyvinyl alcohol fibers is improved to some extent.

The invention relates to a rectifying method of vinyl acetate. The rectifying method comprises the following steps of firstly, using a rectifying tower to rectify the degassed and crudely distilled vinyl acetate; then, respectively rectifying the vinyl acetate in a rectifying section and a stripping section of the rectifying tower. The rectifying method has the advantages that by rectifying the vinyl acetate in the stripping section, the contents of benzene and benzene series in the vinyl acetate are greatly reduced; the problem of high contents of the benzene and the benzene series in the vinyl acetate in the prior art is solved, and the quality standard of smoke water-based latex products is met.

The invention is silicon alkyl cross-linking polyolefin elastomer combination, adopting LLDPE (or ULDPE) and paraffin ot replace EPDM and using silicon grafting system to replace bakelite sulfuration system. It can meet different demands. The components of the compound: PP 2-10 phr; LDPE or ULDPE 50-80 phr; paraffin 50-500 phr; silicon hydride 2-10 phr; peroxide 0.5-2.5 phr; water 0.1-5.0 phr; and anti-oxidizing agent: 0.1-0.3%.

Technical scheme is as following: exothermic material is composed of granules of bamboo charcoal and organic or inorganic bond; granules of bamboo charcoal is as conducting medium in 10-70 wt % of exothermic material, and organic or inorganic bond is as base body in residual amount. Advantages are: whole surface is heating surface and heat delivery surface so as not form local high temperature; small current density is for safe use; high thermal efficiency possesses features of energy saving; the exothermic material can be prepared in different shape.

A method for cross-linking modification of aliphatic polycarbonate, including the following steps: using aliphatic diol and dimethyl carbonate DMC as polymerization monomers under the action of a catalyst, introducing a cross-linking agent 1,3,5-benzene Trimethanol BTM is obtained through one-pot polymerization; the cross-linked aliphatic carbonate prepared by the invention has good thermal properties and swelling properties, and has good application prospects in the field of environmental pollution treatment; the cross-linking process in the polymerization reaction is changed The addition amount and polymerization conditions of the agent 1,3,5-benzenetrimethanol can effectively control the cross-linking degree and performance of aliphatic polycarbonate to meet the needs of different uses.

The invention relates to the technical field of glass, in particular to a method for preparing surface crystallization glass ceramics. The method comprises the steps of 1, providing raw materials and grinding and evenly mixing the raw materials, wherein the raw materials are zinc oxide, boron oxide and silicon dioxide which are mixed based on the molar ratio of (25-60):(5-50):(5-30); 2, heating and melting the product generated in step 1 to obtain glass metal; 3, conducting molding and annealing on the glass metal generated in step 2 to obtain an intermediate product; 4, conducting heat treatment on the intermediate product generated in step 3 to obtain the surface crystallization glass ceramics. According to the method, no crystallization agent is required, processes are simple, steps are clear, cost is low, and surface crystallization effect is good.