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Method for preparing nano alumina fiber film material

A technology of nano-alumina and nano-fiber membranes, which is applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., and can solve the problem of less research on quasi-one-dimensional nano-alumina fibers

Inactive Publication Date: 2008-05-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the emergence of nanotechnology, scholars at home and abroad have done a lot of research on nano-alumina research, but at present, most of them are preparing nano-alumina particles or nanowires by physical and chemical methods. less research

Method used

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  • Method for preparing nano alumina fiber film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 3g of polyvinylpyrrolidone with a viscosity-average molecular weight of 600,000 and pour it into 57mL of ethanol solvent, stir at a high speed until completely dissolved to obtain a 5% polyvinylpyrrolidone ethanol solution, weigh 1g of anhydrous aluminum chloride and dissolve In 9mL of distilled water, then mix the two solutions and stir at high speed for 1 hour to obtain a sol-gel electrospinning solution; inject the prepared sol-gel spinning solution into an electrospinning device, and extrude at a voltage of 25kV. The aluminum chloride / polyvinylpyrrolidone nanofiber membrane was electrospun under the conditions of a speed of 10mL / min and a receiving distance of 10cm; finally, the prepared aluminum chloride / polyvinylpyrrolidone nanofiber membrane was placed in a muffle furnace at 50 The temperature was raised to 450°C at a rate of °C / h, and dried for 5 hours to obtain a dry nano-alumina fiber membrane.

Embodiment 2

[0024] Take 3g of polyvinylpyrrolidone with a viscosity-average molecular weight of 900,000 and pour it into 47mL of ethanol solvent, stir at a high speed until completely dissolved, and obtain a 6% polyvinylpyrrolidone ethanol solution, weigh 2g of anhydrous aluminum chloride and dissolve In 8mL of distilled water, then mix the two solutions and stir at high speed for 1 hour to obtain a sol-gel electrospinning solution; inject the prepared sol-gel spinning solution into an electrospinning device, and extrude at a voltage of 30kV. The aluminum chloride / polyvinylpyrrolidone nanofiber membrane was electrospun at a speed of 5 mL / min and a receiving distance of 10 cm; finally, the prepared aluminum chloride / polyvinylpyrrolidone nanofiber membrane was placed in a muffle furnace and heated at 50 The temperature was raised to 450°C at a rate of °C / h, and calcined for 5 hours to obtain an amorphous nano-alumina fiber membrane.

Embodiment 3

[0026] Take 3g of polyvinylpyrrolidone with a viscosity-average molecular weight of 1.1 million and pour it into 40mL of ethanol solvent, stir at high speed until it is completely dissolved to obtain a 7% polyvinylpyrrolidone ethanol solution, weigh 2g of anhydrous aluminum chloride and dissolve In 10mL of distilled water, then mix the two solutions and stir at high speed for 1 hour to obtain a sol-gel electrospinning solution; inject the prepared sol-gel spinning solution into an electrospinning device, and extrude at a voltage of 30kV. The aluminum chloride / polyvinylpyrrolidone nanofiber membrane was electrospun at a speed of 8 mL / min and a receiving distance of 15 cm; finally, the prepared aluminum chloride / polyvinylpyrrolidone nanofiber membrane was placed in a muffle furnace and heated at 50 The temperature was raised to 900°C at a rate of °C / h, and calcined for 5 hours to obtain a γ-shaped nano-alumina fiber membrane.

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Abstract

The invention relates to a technology of preparing nano alumina fiber membrane material by electrostatic spinning, comprising: 1. the configuration of sol gel electrostatic spinning liquid. Pouring polyvinyl pyrrolidone into ethanol solvent and stirring thereof with high speed until completely dissolved; getting the polyvinyl pyrrolidone ethanol solution with the concentration of 5-8wt%, then, mixing the solution with the aluminum chloride solution with the concentration of 10-30wt%, wherein, the weight ratio between the polyvinyl pyrrolidone and the aluminum chloride is 3:1-1:1, stirring for one hour. 2. Electrostatic spinning. The prepared sol gel spinning liquid is injected into the electrostatic spinning device and electrostaticly spinning thereof is injected into aluminum chloride / polyvinyl pyrrolidone nano fiber membrane under the voltage of 25-35kv, the extrusion speed of 1-10ml / min and the reception distance of 10-20cm. 3. calcining. At last putting the prepared aluminum chloride / polyvinyl pyrrolidone nano fiber membrane into a muffle furnace and raising the temperature to 450-1100 DEG C with the speed of 50 DEG C / h, calcining for five hours and getting amorphous, Gamma type or Alpha type aluminum oxide fiber membrane. The nano aluminum oxide fiber membrane made by the invention is a catalyst and the carrier material of the catalyst and high temperature resistance filtration material with high specific surface area, good thermal stability and excellent mechanical properties. Furthermore, the material can be widely applied in fields such as the insulating materials and reinforced composites of space shuttle and high temperature boiler.

Description

technical field [0001] The invention relates to a method for preparing inorganic nano-oxide fibers, in particular to preparing nano-alumina fiber membrane materials by an electrospinning method. Background technique [0002] Alumina fiber is a new type of inorganic material. It is the latest ultra-light high-temperature refractory material at home and abroad. The product has excellent high-temperature mechanical properties, good chemical corrosion resistance, low thermal conductivity, wear resistance and Oxidation and other characteristics, due to alumina (Al 2 o 3 ) has a variety of crystal structures, among which α-Al 2 o 3 With excellent high temperature resistance and high temperature mechanical properties, it is an excellent sintering furnace lining and high temperature filter material; and γ-Al 2 o 3 It has the characteristics of large specific surface area and high reactivity, and can be used for petroleum cracking, automobile tail gas purification catalyst and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/00B01D39/20B01J32/00C01D5/00D01F9/08
Inventor 康卫民程博闻任元林庄旭品刘亚
Owner TIANJIN POLYTECHNIC UNIV
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