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Method for preparing micro/nano porous ceramic fibers by low-temperature electrostatic spinning

An electrospinning and nanoporous technology, applied in the field of material preparation, can solve the problems of small specific surface area of ​​micro- and nanoporous ceramic fibers, and achieve the effect of high specific surface area and broad application prospects

Inactive Publication Date: 2012-07-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, there is no method for preparing micro- and nano-porous ceramic fibers by combining electrospinning and freeze-drying techniques in relevant literature, and the specific surface area of ​​micro- and nano-porous ceramic fibers prepared by existing methods is small

Method used

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  • Method for preparing micro/nano porous ceramic fibers by low-temperature electrostatic spinning
  • Method for preparing micro/nano porous ceramic fibers by low-temperature electrostatic spinning
  • Method for preparing micro/nano porous ceramic fibers by low-temperature electrostatic spinning

Examples

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Effect test

Embodiment 1

[0041] First, 3.5g of polystyrene was dissolved in 90g of camphene, then 6.5g of butyl phthalate was added, and the spinning solution was obtained after stirring and aging; the spinning solution was poured into a syringe, and the ambient temperature of low-temperature electrospinning was 0°C. The relative partial pressure of the camphene vapor is 90%, the voltage in the spinning process is 40kV, the collection distance is 30cm, and the spinning solution propulsion speed is 2.5ml / h, and the composite fiber is spun out, and the composite fiber is made of butyl phthalate, polyester It is composed of styrene and camphene crystals; then dried in an environment of 660Pa to obtain composite porous fibers, which are composed of butyl phthalate and polystyrene; the composite porous fibers are sintered at 1200°C to obtain micro and nano TiO 2 Porous fibers.

Embodiment 2

[0043]First, dissolve 19.5g of polyvinyl alcohol in 70g of deionized water, then add 10.5g of zinc nitrate, stir and age to obtain a spinning solution; pour the spinning solution into a syringe, and the temperature of the low-temperature electrospinning environment is -20°C. The relative partial pressure of the steam is 40%, the voltage during the spinning process is 23kV, the collection distance is 10cm, the spinning solution propulsion speed is 0.5ml / h, and the composite fiber is obtained by spinning. The composite fiber is composed of zinc nitrate, polyvinyl alcohol and ice crystals. Composition; then drying in an environment of 50Pa to obtain a composite porous fiber, the composite porous fiber is composed of zinc nitrate and polyvinyl alcohol; the composite porous fiber is sintered at 1200 ° C to obtain micro-nano ZnO porous fiber.

Embodiment 3

[0045] First, dissolve 20g of polyvinylpyrrolidone in 60g of tert-butanol, then add 20g of tetraethyl orthosilicate, stir and age to obtain a spinning solution; pour the spinning solution into a syringe, and the ambient temperature of low-temperature electrospinning is -40°C , the relative partial pressure of tert-butanol vapor is 50%, the voltage during the spinning process is 10kV, the collection distance is 15cm, the spinning solution propulsion speed is 1ml / h, and the composite fiber is obtained by spinning. ester, polyvinylpyrrolidone and tert-butanol crystals; then dry in an environment of 120Pa to obtain a composite porous fiber, which is composed of tetraethyl orthosilicate and polyvinylpyrrolidone; the composite porous fiber is sintered at 800 ° C , to obtain micro- and nano-SiO 2 Porous fibers.

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Abstract

The invention relates to a method for preparing micro / nano porous ceramic fibers by low-temperature electrostatic spinning. With combining electrostatic spinning technology and freeze-drying technology, the micro / nano porous ceramic fibers are prepared by freeze-drying and sintering after electrostatic spinning at a low temperature; and the method comprises four steps of preparing a spinning solution, electrostatic spinning at a low temperature, freeze-drying and sintering. The method for preparing micro / nano porous ceramic fibers by low-temperature electrostatic spinning can obtain an extremely high specific surface area, and is beneficial to improving performances of contacting, catalyzing, separating and sensing of ceramic fibers, and has wide application prospects in fields of biomedicine, filter materials, catalyst carriers, fuel cells, electronic element appliances and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing micro- and nano-porous ceramic fibers by low-temperature electrostatic spinning. Background technique [0002] Micro- and nano-porous ceramic fibers have a wide range of uses and can be used in biomedicine, such as: degradable drug release materials, wound repair membranes, bone repair fillers, etc.; can also be used in electronic devices, such as: solar cell substrates, Catalytic carrier, sensitive resistor, piezoelectric material, etc. [0003] Electrospinning (referred to as electrospinning) is generally used to spin polymer fiber materials, that is, polymer solutions or melts are used to form jet streams under the action of high-voltage electrostatic fields, and fibers are formed after drying. In recent years, the electrospinning technology of ceramic materials has been invented, that is, the ceramic sol solution (also called c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/453C04B35/14C04B35/622
Inventor 赵康汤玉斐滕乐天徐雷
Owner XIAN UNIV OF TECH
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