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

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 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.