A composite nanofiber filter material with photocatalytic function and preparation method thereof

A technology of composite nanofibers and filter materials, which is applied in the field of photocatalytic materials, can solve problems such as easy blockage of the liquid outlet of the needle/nozzle, and achieve the effects of high efficiency, low resistance, increased spinning speed, and fine diameter

Active Publication Date: 2020-05-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to effectively solve the problem of easy blockage of the liquid outlet of the existing needle / nozzle for electrospinning, to have good photocatalytic efficiency for formaldehyde, amines and toluene, and to have excellent filtration performance

Method used

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  • A composite nanofiber filter material with photocatalytic function and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] A composite nanofiber filter material with photocatalytic function and a preparation method thereof, the preparation method comprising the following steps:

[0046] 1) Spinning liquid preparation: uniformly disperse titanium dioxide (0.5wt% added, particle size 10nm) in formic acid to form a dispersion liquid, and use an ultrasonic disperser (ultrasonic frequency 40kHz, ultrasonic temperature 80°C) to ultrasonically stir for 20min, and then Nylon 6 (with a weight average molecular weight of 50,000) was added to the dispersion, and after sealing, it was continuously stirred for 15 hours with a magnetic stirring device, and finally a stable and uniform polymer spinning solution with a mass concentration of 10% was prepared;

[0047] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined needle for electrospinning is used to realize the spinning polymer solution to be stretched at the ...

Embodiment 2

[0052] A composite nanofiber filter material with photocatalytic function and a preparation method thereof, the preparation method comprising the following steps:

[0053] 1) Preparation of spinning solution: uniformly disperse titanium dioxide (addition amount 1wt%, particle size 15nm) in N,N-dimethylacetamide to form a dispersion solution, and use an ultrasonic disperser (ultrasonic frequency 40kHz, ultrasonic temperature 70°C ) after ultrasonic stirring for 30 min, polyurethane (weight-average molecular weight is 80,000) was added to the dispersion, and after sealing, it was continuously stirred for 8 hours with a magnetic stirring device, and finally a stable and uniform mass concentration of 15% polymer spinning was prepared. liquid;

[0054] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined needle for electrospinning is used to realize the spinning polymer solution to be stretc...

Embodiment 3

[0059] A composite nanofiber filter material with photocatalytic function and a preparation method thereof, the preparation method comprising the following steps:

[0060] 1) Preparation of spinning solution: uniformly disperse titanium dioxide (addition amount 1.5wt%, particle size 18nm) in N,N-dimethylformamide to form a dispersion, and use an ultrasonic disperser (ultrasonic frequency 35kHz, ultrasonic temperature 50 ℃) after ultrasonic stirring for 40 minutes, polyvinylidene fluoride (weight-average molecular weight: 320,000) was added to the dispersion, and after sealing, it was continuously stirred for 9 hours with a magnetic stirring device, and finally a stable and uniform mass concentration of 18% was prepared. polymer spinning solution;

[0061] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined needle for electrospinning is used to realize the spinning polymer solution to b...

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Abstract

The invention relates to a composite nanofiber filter material with photocatalytic function and a preparation method thereof. The filter material consists of a support layer and a nanofiber filter layer attached to the surface of the support layer, and the nanofiber layer is uniformly filled with a photocatalyst. The preparation method comprises the steps of: 1) preparation of a spinning solution:dispersing a certain amount of photocatalyst evenly in a solvent to form a dispersion, conducting ultrasonic treatment, then adding a high polymer to form a stable and homogeneous electrostatic spinning solution; 2) electrospinning: setting electrospinning parameters, using a combined needle for electrospinning to achieve silk stretching of a spinning polymer solution at a solid metal wire tip; and 3) use of recovered solvent vapor for slight dissolving treatment on the composite nanofiber filter material surface at certain release rate, thus obtaining the composite nanofiber filter materialwith photocatalytic function finally. The composite nanofiber filter material with photocatalytic function provided by the invention effectively solves the easy blocking problem of existing electrospinning needle / nozzle liquid discharge ends, has good photocatalytic efficiency on formaldehyde, amine, toluene and the like, and also has excellent filtration performance, thus having broad applicationprospects.

Description

technical field [0001] The invention relates to a composite nanofiber filter material with a photocatalytic function, in particular to a preparation method of a composite nanofiber filter material with a photocatalytic function, and belongs to the field of photocatalytic materials. Background technique [0002] Formaldehyde is one of the common pollutants in the indoor air of renovated buildings. The formaldehyde discharged into the air by building materials is increasing year by year. In addition, indoor smoking will also release a large amount of harmful gases such as formaldehyde. Indoor formaldehyde, benzene, ammonia, etc. Pollution has caused great concern. Applying photocatalysis to filter materials can not only effectively prevent fine particles such as PM2.5 in the external environment from entering the room, but also decompose indoor formaldehyde and other organic pollutants. [0003] The patent "a titanate nanosheet photocatalytic membrane material and its prepara...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01D39/16B01D53/86B01D53/72D01F6/90D01F6/94D01F6/48D01F6/92D01F6/52D01F6/50D01F6/56D01F6/54D01F1/10D01F11/08D01D5/00
Inventor丁彬廖亚龙赵兴雷李玉瑶王儒印霞俞建勇
OwnerDONGHUA UNIV