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Method for preparing porous hollow nano-alumina fiber by static spinning

A nano-alumina and nano-fiber technology, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of complex electrospinning equipment and cumbersome process, and achieve good environmental friendliness, high specific surface area, and equipment requirements. low effect

Inactive Publication Date: 2012-11-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation of hollow nano-ceramic fibers by electrospinning technology mentioned above requires a special needle with an inner cannula, a nuclear layer extractant or a special template polymer, and the electrospinning equipment is complex and the process is cumbersome.

Method used

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  • Method for preparing porous hollow nano-alumina fiber by static spinning
  • Method for preparing porous hollow nano-alumina fiber by static spinning
  • Method for preparing porous hollow nano-alumina fiber by static spinning

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Add 0.1~1gAl(NO 3 ) 3 9H 2 O was dissolved in 9g of DMF, and after stirring and dissolving, 1g of PAN (Mw=80000) was added to prepare a uniform and transparent light yellow spinning solution under heating. Under the conditions of voltage of 10KV, injection speed of 0.5mL / min, and receiving distance of 5cm, nanofibers were obtained by electrospinning, and hollow nano-alumina fibers were obtained by sintering at 500, 1000, and 1300°C for 1-2h respectively (see figure 1 , figure 2 and image 3 ).

Embodiment 2

[0031] Dissolve 0.1~1g of aluminum acetate in 9g of DMF, stir and dissolve, add 1g of PAN (Mw=80000), and prepare a uniform and transparent light yellow spinning solution under heating. Under the conditions of voltage 30KV, injection speed 2mL / min, and receiving distance 10cm, nanofibers were obtained by electrospinning, and hollow nano-alumina fibers were obtained by sintering at 500, 1000, and 1300°C for 1-2 hours respectively.

Embodiment 3

[0033] Dissolve 0.1~1g of aluminum acetylacetonate in 9g of ethanol, stir and dissolve, add 1g of PVP (Mw=1300000), and prepare a uniform and transparent light yellow spinning solution under heating. Under the conditions of voltage of 25KV, injection speed of 2.5mL / min, and receiving distance of 15cm, nanofibers were obtained by electrospinning, and hollow nano-alumina fibers were obtained by sintering at 500, 1000, and 1300°C for 1-2h respectively.

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Abstract

The invention relates to a method for preparing porous hollow nano-alumina fiber by static spinning. The method comprises the steps of: (1) dissolving metal salt and polymer into a cosolvent to obtain uniform or stably diffused spinning liquid, wherein the decomposing temperature of the metal salt is lower than that of the polymer, the vitrification transformation temperature of the polymer is lower than the decomposing temperature of the metal salt, and the diffusing rate of the oxide produced by decomposing the metal salt is less than the diffusing rate of the metal salt; (2) carrying out static spinning on the spinning liquid to obtain hybridized nanometer fiber; and (3) drying the hybridized nanometer fiber, and thermally processing to obtain the porous hollow nano-alumina fiber. According to the static spinning preparation method, the preparation technology is simple, and a special spinning needle head with an internal inserting pipe is not needed, and the requirement on equipment is low; and the obtained alumina fiber has the characteristics of high specific surface area, porous performance, and hollow performance and the like.

Description

technical field [0001] The invention belongs to the field of preparation of hollow ceramic fibers, in particular to a method for preparing porous hollow nano-alumina fibers by electrospinning. Background technique [0002] Ceramic fiber is a kind of fibrous lightweight refractory material, the diameter is generally 2~5μm, the length is 30~250mm, and the surface of the fiber is smooth and cylindrical. Due to the advantages of high temperature resistance, good thermal stability, low thermal conductivity, and small specific heat, it is widely used in various fields such as petrochemical, metallurgy, electric power, aviation, aviation, and aerospace. Ceramic fibers first appeared in 1941. Bob Wilcox Company of the United States used natural kaolin and melt-blown them into fibers using electric arc furnaces. Since the 1970s, ceramic fibers began to be produced and used in my country, and their application technology was rapidly promoted in the 1980s. In the 1990s, zirconium-cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/10D01F11/00D01D5/00
Inventor 刘朋超朱轶铮马敬红龚静华杨曙光徐坚
Owner DONGHUA UNIV
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