Zirconia mesoporous fiber and preparation method thereof

A technology of zirconia mesoporous and zirconium mesoporous, which is applied in fiber treatment, spinning solution preparation, textile and paper making, etc., to achieve the effects of good continuity, mature preparation means and complete morphology

Active Publication Date: 2010-07-21
山东德艾普节能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the obtained fiber is only 50-75m2 under the condition of heat treatment at 450°C. 2 g -1 , there is still a certain gap between this technical solution and its practical application in industry

Method used

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  • Zirconia mesoporous fiber and preparation method thereof
  • Zirconia mesoporous fiber and preparation method thereof
  • Zirconia mesoporous fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation solution: ZrOCl 2 ·8H 2 O 0.018mol and Si(OC 2 h 5 ) 4 0.002mol, (molar ratio Si(OC 2 h 5 ) 4 : ZrOCl 2 ·8H 2 O=1:9) is dissolved in dehydrated alcohol, is mixed with the solution that mass concentration is 25%, then adds the ethanol solution (mass concentration is 25%) of 2.5g block copolymer template agent P123, obtains mixed solution I; Room temperature down, press CH 3 COOK: ZrOCl 2 ·8H 2 Potassium acetate (CH 3 COOK, 0.018mol) and dissolved in absolute ethanol to prepare a mass concentration of 15% potassium acetate ethanol solution II. This solution II was slowly added to the above mixed solution I. Continue to stir, and after separating the generated white precipitate (KCl), a clear precursor sol is obtained.

[0045] (2) Distill and concentrate the obtained precursor sol under reduced pressure at 40° C. to obtain a sol spinning solution with a viscosity of 40 Pa·s.

[0046] (3) The sol was placed statically for 2 hours, and the pre...

Embodiment 2

[0049] As described in Example 1, the difference is that the molar ratio of Si(OC 2 h 5 ) 4 : ZrOCl 2 ·8H 2 O=1:4, CH 3 COOK: ZrOCl 2 ·8H 2 O=1:1 add ZrOCl 2 ·8H 2 O, Si(OC 2 h 5 ) 4 and CH 3 COOK. It can be obtained with a diameter of 5-10μm, a pore diameter of about 5nm, and a specific surface area of ​​114m 2 g -1 , the pore volume is 0.137cm 3 g -1 zirconia mesoporous fibers.

Embodiment 3

[0051] As described in Example 1, the difference is that the molar ratio of Si(OC 2 h 5 ) 4 : ZrOCl 2 ·8H 2 O=3:7, CH 3 COOK: ZrOCl 2 ·8H 2 O=1:1 add ZrOCl 2 ·8H 2 O, Si(OC 2 h 5 ) 4 and CH 3 COOK. It can be obtained with a diameter of 5-10μm, a pore diameter of about 5nm, and a specific surface area of ​​146m 2 g -1 , the pore volume is 0.164cm 3 g -1 zirconia mesoporous fibers.

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Abstract

The invention relates to zirconia mesoporous fiber and a preparation method thereof. The diameter of the zirconia mesoporous fiber is between 5 and 10 mum, the length is between 1 and 10 cm, the mesoporous hole diameter is between 4 and 9 nm, the specific surface area is between 80 and 200 m<2>g<-1>, and the pore volume is between 0.1 and 0.35 cm<2>g<-1>. The mesoporous fiber uses segmented copolymers as template agents, adopts a sol-gal process to be combined with an evaporation inducement self assembly mode, and simultaneously utilizes special additives for controlling the hydrolytic polycondensation balance in the precursor sol synthesis process. Solvents are evaporated to obtain the sol with the certain viscosity, and the precursor fiber is obtained through centrifugal thread throwing. Irconia mesoporous fiber which has the complete shape and appearance, the length as long as centimeter grade, vermicular pore passage structures and higher specific surface and stability can be obtained through further heat treatment. The method is mature and reliable, and the obtained fiber has good uniformity, and has the importance application value in the fields of catalysis, separation, absorption and the like.

Description

(1) Technical field [0001] The invention relates to a mesoporous zirconia fiber and a preparation method thereof, belonging to the technical field of mesoporous fiber material synthesis. (2) Background technology [0002] Zirconia is a special transition metal oxide, which has a high melting point (2715°C), low thermal conductivity and saturated vapor pressure, and is a very important structural and functional material. Materials with zirconia as the main component have excellent mechanical properties and high-temperature stability, and can be used as ceramic coatings and high-temperature components, especially in aerospace applications with very significant advantages. It also has high chemical stability, ion exchange performance and acid and alkali corrosion resistance, which makes it have very important application value in high temperature fuel cells, adsorption, separation technology, and oxygen sensors. As a P-type semiconductor, its surface has abundant oxygen vacanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01D1/02D01D5/00D01D10/02
Inventor 于刚朱陆益王新强宋永远刘久荣张光辉许东
Owner 山东德艾普节能材料有限公司
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