34results about How to "Good diameter uniformity" patented technology

The production process of continuously preparing SiC fibre includes the following steps: dissolving high-molecular polymer in solvent to prepare skin solution, dissolving or dispersing the dispersingagent, high-molecular polymer, SiC powder and sintering adjuvant into solvent to prepare core solution, extruding skin solution and core solution from microhole of skin-core composite spinning component under the pressure to make skin solution cover exterior of the core solution, using wet process or dry process to solidifying fluid-flow wire, drawing, drying and winding so as to obtain raw fibre, its core portion is ceramic powder adhered by polymer and its skin portion is made of pure high-molecular material.

The invention discloses a method for preparing an emulsified medicinal composition containing oleum fructus bruceae, which comprises the following steps: (1) mixing a proper amount of water and 1 to 10ml of glycerin; (2) adding at least one of yolk lecithin and poloxamer into liquid prepared in step (1), and performing shear mixing uniformly, wherein the yolk lecithin is between 0.5 and 10g, and the poloxamer is between 0.1 and 5g; and (3) slowly adding 5 to 30ml of oleum fructus bruceae into liquid prepared in step (2), adding water to make the total content be 100ml, adjusting the pressure of a high pressure homogenizer, adopting two-step emulsification method, and continuously circulating 3 to 6 times to prepare the emulsified medicinal composition containing the oleum fructus bruceae.The oleum fructus bruceae emulsion injection prepared by the method has good stability, no hemolysis in a period of validity, and safety, and is favorable for clinical promotion and application.

The invention discloses a method of preparing a silver nanowire and a transparent conductive film of the silver nanowire, and belongs to the technical field of nano material synthesis and thin film preparation.The transparent conductive film has high light transmission and low surface resistance.The method for preparing the silver nanowire is simple, the prepared silver nanowire is good in diameter uniformity, the conductive film is good in light transmission and low in surface resistance, and the silver nanowire can be applied to preparation of the transparent conductive film, so that the prepared conductive film is good in light transmission and low in surface resistance.Under the condition of similar light transmitting performance, the prepared transparent conductive film is low in square resistance, and meanwhile good adhesion performance is achieved.

The invention discloses an emulsifying drug composition with oleum fructus bruceae and making method, which comprises the following parts: at least one of among oleum fructus bruceae, yolk lecithine and mooring luoshamu, glycerol with added water to 100ml to be homogeneous emulsification with grain diameter<=15um. The making method comprises the following steps: (1) adding at least one of yolk lecithine and mooring luoshamu into oleum fructus bruceae to shear-mix uniformly; (2) mixing glycerol and water; (3) adding liquid in step (1) into liquid in step (2) slowly at stirring state to add water of 100ml total amount and adjusting pressure of high-pressure homogeneity machine to adopt method of two-step emulsification to cycle 3-6 times continuously to form product. The invention discloses an injection of oleum fructus bruceae with good stability and without hemolysis in security, which facilitates spreading application of clinic.

The invention relates to a preparation method of a quartz product, and especially relates to a preparation method of a low-hydroxyl large-diameter large-length quartz piece. According to the invention, the piece is prepared with a plasma vertical solid-phase external deposition method. One or a plurality of plasma torches can be configured. During a smelting process, the plasma torch is maintained unmoved, or is subjected to translational motions up and down on a vertical axis. The smelting temperature which is quartz piece surface temperature is 1800-2500 DEG C. Quartz sand is delivered in from a blanking pipe at a plasma torch upper port or by plasma device central airflow. A central base pipe or base rod is fixed on a glass machine tool, and simultaneously rotates when performing translational movements up or down on the vertical axis. Along with the relative movements of the plasma flame and the central base pipe or base rod, the quartz sand is deposed and molten layer by layer, such that a hollow quartz blank piece or a solid quartz blank piece is formed. With the plasma vertical solid-phase external deposition novel method, the prepared quartz piece has the characteristics high purity, low hydroxyl content, high softening point, high strength, high temperature resistance, and uniform diameter.

The invention provides a method for preparing cellulose nanowhiskers from corn husks. The method is characterized by comprising the following specific steps: performing pretreatment, biochemical treatment, mechanical crushing, DMSO (dimethyl sulfoxide) treatment and TEMPO (tetramethylpiperidinooxy) oxidation treatment, putting an obtained mixture into a stirrer, and stirring to obtain a corn husk fiber powder suspension; performing centrifugation treatment to obtain a corn husk fiber precipitate; performing dispersion treatment to obtain a corn husk cellulose nanowhisker suspension; and performing freeze-drying to obtain the corn husk cellulose nanowhiskers. The method provided by the invention has the advantages of simple preparation process, high yield, low energy consumption, no emission of toxic and harmful substances in the production process and large-scale popularization and application potential; and the used corn husks are rich in resources and low in cost, the problem of environmental pollution is solved, and the added value of the corn husks is also improved.

The invention discloses a resin coating metal core steel wire rope for a superspeed elevator. The resin coating metal core steel wire rope comprises a center strand, eight inner-layer stands are symmetrically twisted outside the center strand, the eight inner-layer strands are coated with a resin coating, and eight outer-layer strands are symmetrically twisted outside the resin coating. The resin coating metal core steel wire rope for the superspeed elevator is formed by twisting the eight outer-layer strands outside a resin metal rope core, and the resin metal rope core is formed by evenly wrapping a metal rope core by resin. The steel wire rope of the structure has high shock resistance and diameter uniformity, and the bearing capacity of the steel wire rope is improved. Compared with an elevator steel wire rope with the same diameter and strength grade on the current market, the diameter uniformity of the steel wire rope of the structure is improved by 15%, the shock resistance of the steel wire rope is improved by 10%, and the bearing capacity of the steel wire rope is improved by 5%.

The invention relates to a polyimide nanofiber membrane as well as a preparation method and application thereof. The problems of large surface aperture, easy ion conduction and low diaphragm strengthof the polyimide nanofiber membrane in the existing electrostatic spinning technology are solved. The preparation method of the polyimide nanofiber membrane comprises the following steps carrying outelectrostatic spinning on a polyamic acid salt solution to obtain a polyamic acid salt nanofiber membrane; and carrying out imidization on the polyamic acid salt nanofiber membrane to obtain the polyimide nanofiber membrane. The polyamic acid salt solution comprises a solvent and polyamic acid salt, the surface tension of the polyamic acid salt solution is 40-65 mN/m, and the apparent viscosity ofthe polyamic acid salt solution is 5-20 Pa.s, according to the technical scheme, the problems are better solved, and the method can be used for continuous production of polyimide nanofiber membranes.

The invention relates to uniform ion exchange resin granule production equipment, and belongs to the field of resin production equipment. The uniform ion exchange resin granule production equipment comprises a monomer generation system and a monomer forming system, wherein the monomer generation system comprises a monomer box and a fluidized pipeline; the top of the monomer box is connected with the fluidized pipeline, and the bottom of the monomer box is provided with a raw material inlet and a liquid discharge port; the outer wall of the monomer box is provided with a viewing mirror; the monomer box is internally provided with a shower spray head, and the monomer box is connected with a vibrating motor; the connecting position of the monomer box and the fluidized pipeline is provided with a ripple compensator; the monomer forming system comprises a fluidized tank and a heating tank; the fluidized tank is provided with an upper cover; the upper cover is provided with an air exhaust port; the bottom of the fluidized tank is connected with the heating tank through a flange; the fluidized tank and the heating tank are provided with fluid circulating pipelines; the fluid circulating pipelines are connected with a circulation motor; and the bottom of the heating tank is provided with a discharge port. The uniform ion exchange resin granule production equipment disclosed by the invention can improve the diameter uniformity of ion exchange resin monomer granules, enhances the product spheroidization rate, reduces the cost and increases the production efficiency.

A method for forming a thermoelectric film having a micro groove includes the following steps: A) forming a plurality of parallel sacrificing wires by electrospinning, a diameter of each sacrificing wire being 100-500 nm; B) coating a thermoelectric film having a thickness of 80-200 nm on a part of a surface of each sacrificing wire; and C) removing the sacrificing wires from the thermoelectric films and thus obtaining the thermoelectric films each having the micro groove, a radio side of each thermoelectric film being open to the surroundings. The thermoelectric films finally prepared can have higher size uniformity without the disadvantage of catalyst residual. Further, the thermoelectric films each have a size smaller than the mean free path of phonons in one dimension, and thus the thermoelectric properties of the thermoelectric films can be improved.

The invention belongs to the technical field of materials, and particularly relates to a titanium dioxide nanotube array film, a preparation method thereof and a photoelectric device. The preparation method of a titanium dioxide nanotube array film comprises the following steps: constructing an electrolysis system by using a titanium metal sheet as a working electrode, a counter electrode and an electrolyte, carrying out primary electrolytic treatment, and removing a titanium dioxide array growing on a surface of the working electrode; carrying out secondary electrolytic treatment, wherein a titanium dioxide nanotube array film grows on the surface of the working electrode; carrying out third electrolytic treatment to form a titanium dioxide layer between the titanium metal sheet and the titanium dioxide nanotube array film; and decomposing the titanium dioxide layer to obtain the titanium dioxide nanotube array film. According to the preparation method provided by the invention, through three times of electrolytic treatment, the growth efficiency and quality of the titanium dioxide nanotube array film are improved, preparation of a large-size array film is realized, and the complete and large-size titanium dioxide nanotube array film is obtained.

The invention provides a yarn made of short fibers obtained by stretching and controlling fracture of long fibers and a product thereof. Each single-strand yarn comprises a plurality of tightly combined short fibers. The plurality of tightly combined short fibers are obtained by stretching N strands of long fiber bundles and controlling fracture, and are spun by a spinning process, and N is a natural number. According to the invention, within a sampling length equal to or less than 10 meters, the ratio of the number of short fibers having a length equal to or greater than 60% of the set fiber length among the plurality of short fibers to the total number of the plurality of short fibers is equal to or greater than 60%. The fiber length is set to be equal to or greater than 65 mm. The weight distribution dispersion of the average length of the single yarn according to the invention is equal to or less than 60%.