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Method for preparing dense micro/nano ceramic fiber by virtue of coaxial electrospinning technology

A coaxial electrospinning, ceramic fiber technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of large diameter of ceramic fibers, low fiber density, and high preparation temperature, Achieve the effect of small fiber diameter, broad application prospects and compact structure

Inactive Publication Date: 2015-04-08
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing dense micro-nano ceramic fibers by coaxial electrospinning technology, which solves the problems of large diameter, low fiber density and high preparation temperature of ceramic fibers prepared by existing methods

Method used

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  • Method for preparing dense micro/nano ceramic fiber by virtue of coaxial electrospinning technology
  • Method for preparing dense micro/nano ceramic fiber by virtue of coaxial electrospinning technology

Examples

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Embodiment 1

[0044] Weigh 0.83g of polyvinylpyrrolidone and dissolve it in 20g of absolute ethanol, stir well at room temperature to prepare a shell spinning solution with a concentration of 4%; weigh 1.67g of zirconium oxychloride and dissolve it in 15g of deionized water, After uniform stirring, a core layer spinning solution with a concentration of 10% was prepared. Pour the shell spinning solution into the shell micropump, pour the core spinning solution into the core micropump, and set the spinning parameters as follows: the diameter of the core spinneret is 0.1mm, and the diameter of the shell spinneret is 0.6mm, core layer spinning solution propulsion rate 0.1mL / h, shell layer spinning solution propulsion rate 0.2mL / h, spinning voltage 10kV, receiving distance 8cm, spinning environment relative humidity 20%, obtained by electrospinning The shell layer is polyvinylpyrrolidone, and the core layer is coaxial structure spun fibers; the coaxial structure spun fibers are calcined at 700°C...

Embodiment 2

[0046] Weigh 1.92g polystyrene and dissolve it in 30g N-N dimethylformamide, stir it evenly at room temperature to make a shell spinning solution with a concentration of 6%; weigh 6.08g yttrium nitrate and dissolve it in 20g tert-butanol After stirring evenly at room temperature, a core layer spinning solution with a concentration of 23.3% was prepared. Pour the shell spinning solution into the shell micropump, pour the core spinning solution into the core micropump, and set the spinning parameters as follows: the diameter of the core spinneret is 0.2mm, and the diameter of the shell spinneret is 0.7mm, core layer spinning solution advancing rate 0.6mL / h, shell layer spinning solution advancing rate 1.2mL / h, spinning voltage 20kV, receiving distance 14cm, spinning environment relative humidity 33%, obtained by electrospinning The shell layer is polystyrene and the core layer is coaxial structure primary fiber of yttrium nitrate; the primary fiber is calcined at 1000°C for 2 ho...

Embodiment 3

[0048] Weigh 2.17g of polyvinyl alcohol and dissolve it in 25g of deionized water, and stir it evenly at room temperature to obtain a shell spinning solution with a concentration of 8%; weigh 5.77g of ferric chloride and dissolve it in 10g of methanol, and stir it evenly at room temperature A core spinning solution with a concentration of 36.6% was prepared. Pour the shell spinning solution into the shell micropump, pour the core spinning solution into the core micropump, and set the spinning parameters: the diameter of the core spinneret is 0.3 mm, and the diameter of the shell spinneret is 0.8mm, core layer spinning solution advancing rate 1.1mL / h, shell layer spinning solution advancing rate 2.2mL / h, spinning voltage 30kV, receiving distance 20cm, spinning environment relative humidity 46%, obtained by electrospinning The shell layer is polyvinyl alcohol, and the core layer is ferric chloride as-spun fiber with coaxial structure; the as-spun fiber with coaxial structure is ...

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Abstract

The invention discloses a method for preparing dense micro / nano ceramic fiber by virtue of a coaxial electrospinning technology. The method comprises the specific steps: carrying out coaxial electrospinning on a prepared spinning solution to obtain nascent fiber having a coaxial structure and then sintering the nascent fiber to obtain the dense micro / nano ceramic fiber. The ceramic fiber prepared by the method for preparing dense micro / nano ceramic fiber by virtue of the coaxial electrospinning technology has the advantages of dense structure, no holes in the fiber, small diameter of fiber and far lower preparation temperature than that of the existing preparation technology and has good economic benefits and broad application prospects in such industries as machinery, metallurgy, chemical engineering, petroleum, ceramics, glass and electronics.

Description

technical field [0001] The invention belongs to the field of preparation of ceramic nanofibers, and relates to a method for preparing dense micro-nano ceramic fibers by coaxial electrospinning technology. Background technique [0002] Ceramic fiber is a kind of fibrous lightweight refractory material, which has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical vibration resistance, so it is widely used in machinery, metallurgy, chemical industry, petroleum, ceramics, Glass, electronics and other industries have been widely used. [0003] At present, electrospinning is an important method for preparing ceramic fibers. Ceramic fibers prepared by electrospinning have the advantages of small diameter, large specific surface area, and low sintering temperature. The electrospinning method is to dissolve the polymer and the ceramic precursor in a solvent and stir evenly to make a spinni...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/505C04B35/26C04B35/10C04B35/626B82Y30/00B82Y40/00
Inventor 汤玉斐赵康付松
Owner XIAN UNIV OF TECH
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