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Preparation method of NiO/gamma-Al2O3 composite ceramic nanofiber

A technology of nanofibers and composite ceramics is applied in the field of preparation of composite ceramic nanofibers to achieve the effects of high catalytic activity, good flexibility and cost reduction

Inactive Publication Date: 2012-06-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as Larsen et al [G.Larsen, R.Velarde Ortiz, et al. A method for making inorganic and hybrid (organic / inorganic) fibers and vesicles with diameters in the submicrometer and micrometer range via sol-gel chemistry and electrically forced liquid jets. J.Am.Chem.Soc.2003, 125(5):1154-1155] will inhibit the gel activity of the Al obtained in the water / ethanol mixed medium 2 o 3 The gel precursor was introduced into the electrospinning device, and the Al 2 o 3 Electrospun fibers, but the fiber morphology is obviously very different from the alumina nanofibers prepared by the blending method, indicating that the preparation method, the treatment conditions of the precursor and other factors have a greater impact on the final fiber morphology and structure

Method used

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  • Preparation method of NiO/gamma-Al2O3 composite ceramic nanofiber
  • Preparation method of NiO/gamma-Al2O3 composite ceramic nanofiber
  • Preparation method of NiO/gamma-Al2O3 composite ceramic nanofiber

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Mix and stir 0.3g aluminum acetate and 6g methanol in a weight ratio of 1:20 to fully dissolve the components to obtain Al(CH 3 COO) 3 solution, then add 4g of nickel acetate solid into the above aluminum acetate solution, stir fully to obtain uniformly dispersed Ni(CH 3 COO) 2 / Al(CH 3 COO) 3 Mix the solution, fully dissolve the PVP solid of 2g and the ethanol of 20g by weight ratio 1:10 to obtain the PVP solution, and the PVP solution is added to the above-mentioned Ni(CH) with a mass ratio of 2:1 3 COO) 2 / Al(CH 3 COO) 3 in the mixed solution, and then stirred uniformly to obtain Ni(CH 3 COO) 2 / Al(CH 3 COO) 3 / PVP precursor solution for electrospinning. The electrospinning parameters are: voltage 9kv, silk liquid supply rate 1.0ml / h, distance between the spinneret and the receiving plate 15cm, ambient temperature 25°C, and ambient humidity 30%. figure 1 The precursor nanocomposite fiber membrane shown is finally calcined at 600°C to obtain the following...

Embodiment 2

[0031] Mix and stir 0.3g aluminum acetate and 6g methanol in a weight ratio of 1:20 to fully dissolve the components to obtain Al(CH 3 COO) 3 solution, and then 4g nickel acetate solid was added to the aluminum acetate solution, fully stirred to obtain uniformly dispersed Ni(CH 3 COO) 2 / Al(CH 3 COO) 3 Mixed solution, the PVP solid of 2g and the ethanol of 18g are fully dissolved to obtain PVP solution by weight ratio 1: 9, and the PVP solution mass ratio is 1: 1 and joins above-mentioned Ni (CH 3 COO) 2 / Al(CH 3 COO) 3 in the mixed solution, and then stirred uniformly to obtain Ni(CH 3 COO) 2 / Al(CH 3 COO) 3 / PVP precursor solution for electrospinning. The electrospinning parameters are: voltage 10kv, silk liquid supply rate 1.0ml / h, distance between the spinneret and the receiving plate 15cm, ambient temperature 25°C, ambient humidity 40%, and the precursor nanocomposite fiber membrane is obtained , and finally calcined at 700°C to obtain image 3 Ceramic nanofi...

Embodiment 3

[0033] Mix and stir 1g aluminum acetate and 20g methanol in a weight ratio of 1:20 to fully dissolve the components to obtain Al(CH 3 COO) 3 solution, and then 1g of nickel acetate solid was added to the above aluminum acetate solution, fully stirred to obtain uniformly dispersed Ni(CH 3 COO) 2 / Al(CH 3 COO) 3 Mixed solutions; 2g of PVP solids and 18g of ethanol are fully dissolved in a weight ratio of 1:9 to obtain a PVP solution, and the PVP solution mass ratio is 1:1 added to the above-mentioned Ni (CH 3 COO) 2 / Al(CH 3 COO) 3 in the mixed solution, and then stirred uniformly to obtain Ni(CH 3 COO) 2 / Al(CH 3 COO) 3 / PVP precursor solution for electrospinning. Electrospinning parameters are: voltage 11kv, silk liquid supply rate 1.0ml / h, distance between spinneret and receiving plate 15cm, ambient temperature 25°C, ambient humidity 50%, and the precursor nanocomposite fiber is obtained film, and finally calcined at 800°C to obtain Figure 4 Ceramic nanofibers s...

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Abstract

The invention relates to a preparation method of an NiO / gamma-Al2O3 composite ceramic nanofiber, and the method comprises: (1) mixing and stirring an aluminum salt with a solvent so as to obtain an aluminum salt solution, adding a nickel salt into the aluminum salt solution, and stirring them fully so as to obtain an aluminum salt / nickel salt mixed solution; (2) first adding a spinnable polymer into the solvent, and adding the obtained solution into the aluminum salt / nickel salt mixed solution, thus obtaining an aluminum salt / nickel salt / spinnable polymer mixed spinning solution; (3) subjecting the mixed spinning solution to electrostatic spinning, thus obtaining a precursor composite nanofiber; and (4) calcinating the precursor composite nanofiber so as to obtain the NiO / gamma-Al2O3 composite ceramic nanofiber. The method of the invention utilizes the traditional electrostatic spinning technology for preparing an inorganic nanofiber indirectly, and the fiber has uniform diameter distribution, high length-diameter ratio, and good flexibility. And the method has simple and practicable process, as well as high success rate.

Description

technical field [0001] The invention belongs to the field of preparation of composite ceramic nanofibers, in particular to a NiO / γ-Al 2 o 3 A method for preparing composite ceramic nanofibers. Background technique [0002] Electrospinning is a preparation technology of ultrafine fibers that use charged polymer solutions or melts to be sprayed into filaments driven by a strong electric field. The diameter of the prepared fibers is generally between tens of nanometers and several microns. The most simple and efficient preparation method for continuous long nanofibers. Electrospinning is actually a special form of electrostatic atomization of polymer fluids. At this time, the material form of atomization is not tiny droplets, but tiny jets of polymers, which can run for a long distance in the electric field, and the final solvent Volatilized, the polymer is stretched into sub-micron fibers. Materials prepared by electrospinning technology are generally porous, low-density, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/10C04B35/622
Inventor 张彦中袁卉华杨鹏飞屠红斌
Owner DONGHUA UNIV
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