Preparation method of TiO2/PAN nanofiber membrane

A nanofiber membrane and nanocrystal technology, applied in the field of electrospinning, can solve the problems of low photocatalytic performance and anti-aging performance, no market application prospect, and inability to be recycled repeatedly, and achieve strong adsorption and photocatalytic degradation performance, Suitable for widespread application, complete degradation and purification effect

Inactive Publication Date: 2018-07-06
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the preparation of TiO by electrospinning 2 In the process of polymer nanofiber membrane, polyvinylpyrrolidone (PVP) and cellulose acetate (PVAC) are used most, and polyacrylonitrile (PAN) is used as the polymer substrate to prepare TiO 2 / PAN nanofiber membranes are rarely used, and the TiO 2 / PAN nanofiber membrane has low photocatalytic performance and anti-aging performance, and cannot be recycled repeatedly, which increases its use cost and seriously affects the improvement of economic benefits, and does not have market application prospects

Method used

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  • Preparation method of TiO2/PAN nanofiber membrane
  • Preparation method of TiO2/PAN nanofiber membrane
  • Preparation method of TiO2/PAN nanofiber membrane

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Experimental program
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Embodiment 1

[0039] The first step: at room temperature, weigh the quantitative polyacrylonitrile powder as the solute, select DMF as the solvent, configure a polymer solution with a concentration of 12wt%, put the above solution on a magnetic stirrer and stir at a constant speed for 3 hours, and wait for the polyacrylonitrile powder to After complete dissolution, a light yellow clear and transparent polymer solution was obtained.

[0040] Step 2: Weigh an appropriate amount of TiO with an average particle size of 25nm 2 nanocrystals, will weigh TiO 2 Nanocrystals are dispersed in the prepared polymer solution, in which TiO 2 The mass ratio of nanocrystals to polyacrylonitrile powder is 0.5; wrap the above-prepared solution with tinfoil to completely shield it from light, ultrasonically oscillate for 30 minutes, and stir at a constant speed for 3 hours to obtain TiO 2 Milky white spinning solution with evenly dispersed nanocrystals.

[0041] The third step: control the temperature at ab...

Embodiment 2

[0049] The first step: at room temperature, weigh the quantitative polyacrylonitrile powder as the solute, select DMF as the solvent, configure a polymer solution with a concentration of 12wt%, put the above solution on a magnetic stirrer and stir at a constant speed for 3 hours, and wait for the polyacrylonitrile powder to After complete dissolution, a light yellow clear and transparent polymer solution was obtained.

[0050] Step 2: Weigh an appropriate amount of TiO 2 nanocrystals, will weigh TiO 2 Nanocrystals are dispersed in the prepared polymer solution, in which TiO 2 The mass ratio of nanocrystals to polyacrylonitrile powder is 0.5; wrap the above-prepared solution with tinfoil to completely shield it from light, ultrasonically oscillate for 30 minutes, and stir at a constant speed for 3 hours to obtain TiO 2 Milky white spinning solution with evenly dispersed nanocrystals.

[0051] The third step: control the temperature at about 20°C and the relative humidity at ...

Embodiment 3

[0059] The first step: at room temperature, weigh the quantitative polyacrylonitrile powder as the solute, select DMF as the solvent, configure a polymer solution with a concentration of 12wt%, put the above solution on a magnetic stirrer and stir at a constant speed for 3 hours, and wait for the polyacrylonitrile powder to After complete dissolution, a light yellow clear and transparent polymer solution was obtained.

[0060] Step 2: Weigh an appropriate amount of TiO 2 nanocrystals, will weigh TiO 2 Nanocrystals are dispersed in the prepared polymer solution, in which TiO 2 The mass ratio of nanocrystals to polyacrylonitrile powder is 0.5; wrap the above-prepared solution with tinfoil to completely shield it from light, ultrasonically oscillate for 30 minutes, and stir at a constant speed for 3 hours to obtain TiO 2 Milky white spinning solution with evenly dispersed nanocrystals.

[0061] The third step: control the temperature at about 20°C and the relative humidity at ...

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Abstract

The invention discloses a preparation method of a TiO2/PAN nanofiber membrane. The method comprises the specific preparation steps that polyacrylonitrile powder is dissolved to obtain a polymer solution; TiO2 nanocrystals are dispersed in the polymer solution to obtain a spinning solution; the spinning solution is sucked into a syringe, the syringe is fixed on an injection pump of electrospinningequipment, a spinneret is connected to a positive electrode of a high-voltage power supply at the same time, a receiving plate is connected to a negative electrode of the high-voltage power supply andcovered with aluminum foil, and electrospinning is conducted to obtain the TiO2/PAN nanofiber membrane. The preparation method is easy to operate, short in process flow and suitable for wide popularization and application, and meanwhile further has excellent catalytic and mechanical properties and broad application prospects.

Description

technical field [0001] The invention relates to the field of electrospinning, and belongs to a kind of TiO that can be used for photocatalytic degradation of organic dyes 2 / PAN nanofiber film preparation method. Background technique [0002] Polyacrylonitrile (PAN) is obtained by free radical polymerization of monomer acrylonitrile, and is mainly used to prepare polyacrylonitrile fibers. There are unsaturated nitrile groups on the polyacrylonitrile membrane. By hydrolyzing the nitrile group into carboxyl groups, the hydrophilicity of the polypropylene fiber membrane can be adjusted to meet the needs of practical applications. In addition, the polypropylene fiber membrane also has weather resistance And the advantages of good resistance to sunlight, at the same time, it also has good resistance to chemical corrosion. Based on the above advantages, polypropylene fiber membranes are widely used in the field of filtering and separating industrial printing and dyeing wastewate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00B01J31/38B01J35/06B01J37/34C02F1/30C02F101/30
CPCB01J31/38B01J35/004B01J35/065B01J37/342C02F1/30C02F2101/308C02F2305/10D01D5/003D01D5/0061D04H1/728
Inventor 刘艳清齐瑞岭何吉欢
Owner SUZHOU UNIV
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