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Composite ceramic nanofiber membrane as well as preparation method and application thereof

A technology of nanofiber membranes and composite ceramics, applied in separation methods, fiber treatment, chemical instruments and methods, etc., can solve problems such as long time consumption, large loss, and high requirements for solution conductivity

Inactive Publication Date: 2020-10-23
南京金思博纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, electrospinning technology is mostly used to produce high-quality ceramic fibers. Although electrospinning technology is multifunctional, there are still some shortcomings that limit its application in industry, such as the need for high-voltage power supply, high requirements for solution conductivity, Low output, high loss, long time-consuming, etc.

Method used

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  • Composite ceramic nanofiber membrane as well as preparation method and application thereof
  • Composite ceramic nanofiber membrane as well as preparation method and application thereof
  • Composite ceramic nanofiber membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a. Preparation of alumina / titania / non-woven composite adsorption material by microfluidic air-jet spinning method (liquid flow rate 0.5mL / h, gas flow rate 7m / s): first, prepare the precursor solution: mix 0.6g PVP powder with 4.5 Mix mL of ethanol and stir overnight to obtain a uniform and transparent solution. Add 5 mL of acetone, 1.00 g of aluminum acetylacetonate, 3 mL of acetic acid and 1.43 mL of isopropyl titanate to the above solution in sequence, stir at room temperature to dissolve completely, and obtain a yellow and transparent precursor body solution. Secondly, keep the distance between the metal needle (the needle is an industrial experiment extension needle, No. 7 22G needle) and the receiver at 40cm, the liquid flow rate is 0.5mL / h, and the gas flow rate is 7m / s, and the roll-to-roll method is used to collect The resulting fiber membrane requires a rotating speed of 100-300rpm, an ambient temperature of 25°C, a humidity of no more than 30-50%, and a receiv...

Embodiment 2

[0027] a. Preparation of alumina / titanium dioxide / non-woven composite adsorption material by microfluidic air-jet spinning method (liquid flow rate 2mL / h, gas flow rate 7m / s): first, prepare the precursor solution: mix 0.6g PVP powder with 4.5mL Mix ethanol and stir overnight to obtain a uniform and transparent solution. Add 5 mL of acetone, 1.00 g of aluminum acetylacetonate, 3 mL of acetic acid and 1.43 mL of isopropyl titanate to the above solution in sequence, and stir at room temperature to completely dissolve it to obtain a yellow and transparent precursor. solution. Secondly, keep the distance between the metal needle and the receiver at 40cm, the liquid flow rate at 2mL / h, and the gas flow rate at 7m / s, and collect the obtained fiber film in a roll-to-roll manner, with a rotation speed of 100-300rpm and an ambient temperature of 25 ℃, the humidity does not exceed 30-50%, and the receiving time is 1h. Finally, the obtained PVP / aluminum acetylacetonate / titanium tetraiso...

Embodiment 3

[0031] a. Preparation of alumina / titanium dioxide / non-woven composite adsorption material by microfluidic air-jet spinning method (liquid flow rate 2mL / h, gas flow rate 10m / s): first, prepare the precursor solution: mix 0.6g PVP powder with 4.5mL Mix ethanol and stir overnight to obtain a uniform and transparent solution. Add 5 mL of acetone, 1.00 g of aluminum acetylacetonate, 3 mL of acetic acid and 1.43 mL of isopropyl titanate to the above solution in sequence, and stir at room temperature to completely dissolve it to obtain a yellow and transparent precursor. solution. Secondly, keep the distance between the metal needle and the receiver at 40cm, the liquid flow rate at 2mL / h, and the gas flow rate at 10m / s, and collect the obtained fiber film in a roll-to-roll manner, with a rotation speed of 100-300rpm and an ambient temperature of 25 ℃, the humidity does not exceed 30-50%, and the receiving time is 1h. Finally, the obtained PVP / aluminum acetylacetonate / titanium tetrai...

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Abstract

The invention relates to a composite ceramic nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving polyvinylpyrrolidone in ethanol as a spinning precursor solution; adding a substance source of a ceramic material, a corresponding solvent and a corresponding auxiliary agent into the precursor solution, and preparing the precursor solution into nanofibers by utilizing microfluid jet spinning equipment under the conditions that the distance between a metal needle and a receiver is kept to be 10-50 cm, the liquid flow rate is kept to be 0.5-4 mL / h and the air pressure is kept to be 0.2-3 MPa, the obtained fiber membrane is collected in a roll-to-roll mode, and the rotating shaft speed is kept to be 100-300 r / min; and roasting the nanofibers in high-temperature air to obtain the loose and porous ceramic nanofiber membrane. The prepared ceramic fiber membrane is large in specific surface area, high in porosity and good in photocatalytic performance and antibacterial performance, and can be applied to the fields of air filtration, personal antibacterial protection and the like.

Description

technical field [0001] The invention belongs to the technical field of ceramic nanofiber membranes, and in particular relates to a composite ceramic nanofiber membrane and its preparation method and application. Background technique [0002] At present, electrospinning technology is mostly used to produce high-quality ceramic fibers. Although electrospinning technology is multifunctional, there are still some shortcomings that limit its application in industry, such as the need for high-voltage power supply, high requirements for solution conductivity, Low output, large loss, long time-consuming, etc. The ceramic fiber membrane prepared by microfluidic air-jet spinning can effectively avoid the waste of raw materials by spraying and stretching the polymer solution with high-speed compressed air. The experimental environment and equipment are simpler and more convenient, and the spinning time is greatly shortened; It is safer to use dangerous devices such as high-voltage pow...

Claims

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Application Information

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IPC IPC(8): D01D5/00C04B35/46C04B35/10C04B35/622B32B9/00B32B9/04B32B5/02B01D46/00B01D46/54B01D53/86B01D67/00B01D69/02B01D69/12B01D71/02
CPCB01D46/0028B01D46/543B01D53/86B01D67/0039B01D69/02B01D69/12B01D71/025B01D2325/10B01D2325/48B32B5/02B32B5/022B32B5/26B32B2262/105B32B2307/7145C04B35/10C04B35/46C04B35/62236C04B35/62259C04B2235/48C04B2235/6562C04B2235/6567D01D5/00
Inventor 代云茜徐婉琳孙岳明
Owner 南京金思博纳米科技有限公司