Method for preparing nano ceramic fibers

A nano-ceramic fiber and nano-fiber technology, which is applied in fiber processing, spinning solution preparation, textile and papermaking, etc., can solve the problems of few nano-ceramic fibers, can not meet actual needs, and limit the selection of materials. The effect of uniform distribution, high aspect ratio and high product success rate

Inactive Publication Date: 2010-11-10
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing nano-ceramic fibers, which solves the problem of strict raw material configuration conditions for electrospun nano-ceramic fibers in the prior art, large restrictions on the types of materials, and fewer varieties of nano-ceramic fibers that can be prepared. Problems that cannot meet actual needs

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  • Method for preparing nano ceramic fibers

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preparation example Construction

[0014] The preparation method of nano ceramic fiber of the present invention is implemented according to the following steps:

[0015] Step 1: By volume percentage, take 3%-15% of ceramic nanoparticles with a particle size of 10nm-300nm, 5%-30% of spinnable polymer, 0.5%-5% of dispersant, and the rest as solvent, with a total volume of 100%.

[0016] Selection of ceramic nanoparticles: titanium dioxide, zinc oxide, magnesium oxide, calcium oxide, zirconium dioxide, vanadium pentoxide, iron oxide, cobalt oxide, nickel oxide, aluminum oxide, manganese dioxide, boron oxide, tin dioxide, lead oxide , arsenic oxide, chromium oxide, cadmium oxide, silicon carbide, silicon nitride, boron nitride, inorganic carbide, and inorganic nitride.

[0017] Spinnable polymer selection: polyvinylpyrrolidone, polyethylene glycol, polyvinyl butyral, sodium polyacrylate, polymethyl methacrylate, polyvinyl alcohol, cellulose, polycarbonate, m-phenylene One of phthalamide, elastic polypeptide, reco...

Embodiment 1

[0030] By volume percentage, Si with a particle size of 10nm 3 N 4 Nanoparticles 3%, polyvinyl alcohol (PVA) 10%, cetyltrimethylammonium bromide 0.5% and 86.5% deionized water for a total volume of 100%. Add polyvinyl alcohol (PVA) into deionized water, heat in a water bath at 85°C and stir magnetically to obtain a PVA solution with a certain viscosity; Si 3 N 4 Nanoparticles and cetyltrimethylammonium bromide were added to the PVA solution, kept at a constant temperature of 85°C in a water bath, then the solution was dispersed, and the stirring was continued for 1h, and then the mixed solution was ultrasonically dispersed for 0.5h, and at 50 ℃ constant temperature swelling for 0.5h, forming Si with uniform composition 3 N 4 / PVA spinning solution. Pour the spinning solution into the syringe, use the flattened injection needle as the capillary for jetting fine flow, the voltage during the electrospinning process is 10kV, the collection distance is 10cm, the spinning solut...

Embodiment 2

[0033]By volume percentage, 6% of NiO nanoparticles with a particle size of 300nm, 5% of polyvinyl butyral (PVB), 5% of ammonium citrate and 84% of deionized water are taken, and the total volume is 100%. Add polyvinyl butyral (PVB) to ethanol, heat in a water bath at 75°C and stir magnetically to obtain a PVB solution with a certain viscosity; add NiO nanoparticles and ammonium citrate to the PVB solution, Maintain a constant temperature of 50°C in the medium, then disperse the solution, keep stirring for 1h, then ultrasonically disperse the mixed solution for 0.5h, and swell at a constant temperature of 75°C for 0.5h to form a NiO / PVB spinning solution with uniform composition. Pour the spinning solution into the syringe, and use the flattened injection needle as the capillary for jetting fine flow. During the electrospinning process, the voltage is 40kV, the collection distance is 30cm, the spinning solution propulsion speed is 2.5mL / h, and the ambient temperature is 50°C ,...

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Abstract

The invention discloses a method for preparing nano ceramic fibers, which is implemented by the following steps: 1, preparing 3 to 15 volume percent of 10 to 30 nanometer ceramic nanoparticles, 5 to 30 volume percent of spinnable high polymer, 0.5 to 5 volume percent of dispersant and the balance of solvent, wherein the total volume of the raw materials is 100 volume percent; 2, adding the spinnable high polymer into the solvent, heating the mixture in a water bath with magnetic stirring to obtain solution of spinnable high polymer; 3, adding the ceramic nanoparticles and the dispersant into the solution of spinnable high polymer obtained by the step 2, keeping the temperature of the mixture constant in a water bath, performing dispersion and ultrasonic dispersion, and performing swelling at a constant temperature to obtain ceramic nanoparticle/spinnable high polymer/solvent spinning solution; 4, controlling the electrostatic spinning process parameters of the spinning solution obtained by the step 3 to obtain nano fibers; and 5, sintering the nano fibers at 400 to 1,200 DEG C to obtain nano ceramic fibers.

Description

technical field [0001] The invention belongs to the technical field of manufacturing nano-ceramic materials, and relates to a method for preparing nano-ceramic fibers. Background technique [0002] Nanoceramic fibers are a class of materials with multiple uses, and are widely used in the fields of catalysis, purification, gas storage, sensors, and environmental protection. The porous structure and huge specific surface area of ​​nano-ceramic fibers are mainly used, combined with the properties of the material itself, to obtain various physical and chemical properties required. The uses of nano-ceramic fibers are different, and different requirements are put forward for their diameter and structure. [0003] There are many preparation methods for nano-ceramic fibers, such as hydrothermal synthesis, chemical vapor deposition, chemical vapor reaction, organic polymer precursor conversion, template method, etc., all of which can prepare nano-ceramics with small diameter and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D1/02D01D10/02D01F9/08
Inventor 赵康汤玉斐滕乐天
Owner XIAN UNIV OF TECH
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