Composite nano fiber filtration material with photocatalysis/anti-bacterial functions and preparation method of filtration material

Abstract

The invention relates to a composite nano fiber filtration material with photocatalysis / anti-bacterial functions and a preparation method of the filtration material. The filtration material comprises a supporting layer and a nano fiber filtration layer which adheres to the surface of the supporting layer, the nano fiber layer is uniformly filled with an photocatalyst and an antibacterial agent, and the preparation method comprises the following steps: 1, preparing a spinning liquid: dispersing a certain amount of the photocatalyst and the antibacterial agent into a solution uniformly to form a dispersion liquid, performing ultrasonic treatment, and adding a high polymer to form a stable and uniform electrostatic spinning solution; 2, performing electrostatic spinning: setting up electrostatic spinning parameters, and performing stretching on the spinning polymer solution at solid metal wire tips for wire production by utilizing an assembled needle head; and 3, performing slight dissolving treatment on the surface of the composite nano fiber filtration material by adopting solvent vapour recovery at a certain releasing speed to obtain the final composite nano fiber filtration material with the photocatalysis / the anti-bacterial functions. The composite nano fiber filtration material effectively solves a problem that the liquid outlet end of a current needle head / spray nozzle used for the electrostatic spinning is easy to block, can be directly used for decomposition of organic pollutants, inactivation of microorganism pathogenes and the like under visible light, and has excellent filtration performance at the same time.

Description

technical field

[0001] The invention relates to a composite nanofiber filter material with both photocatalytic / antibacterial functions, in particular to a preparation method, that is, using a combined needle for electrospinning to realize the stretching of the spinning polymer solution at the tip of a solid metal wire The method is used to process the surface of the composite nanofiber filter material with microsolution at a certain release rate by recovering solvent vapor, which belongs to the field of functional filter materials. Background technique

[0002] Smog and PM2.5 have attracted more and more attention and attention, and the source and harm of smog have become more and more known to people. In addition to air pollution sources such as PM2.5, there are also volatile organic compounds such as formaldehyde and benzene, as well as pollutants such as bacteria, viruses, and fungi, which bring great harm to human health. Therefore, in addition to intercepting fine part...

Examples

Embodiment 1

[0049] A composite nanofiber filter material with both photocatalytic / antibacterial functions and a preparation method thereof, the preparation method comprising the following steps:

[0050]1) Spinning solution preparation: uniformly disperse titanium dioxide photocatalyst (addition amount 0.5wt%, particle size 10nm) and silver ion antibacterial agent (addition amount 0.5wt%) in formic acid to form dispersion liquid, utilize ultrasonic disperser ( Ultrasonic frequency 40kHz, ultrasonic temperature 80°C) after ultrasonic stirring for 20 minutes, nylon 6 (weight average molecular weight: 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 quality A polymer spinning solution with a concentration of 10%;

[0051] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined needle for elec...

Embodiment 2

[0056] A composite nanofiber filter material with both photocatalytic / antibacterial functions and a preparation method thereof, the preparation method comprising the following steps:

[0057] 1) Spinning solution preparation: uniformly disperse titanium dioxide photocatalyst (addition amount 1wt%, particle size 15nm) and zinc oxide antibacterial agent (addition amount 0.1wt%) in N, N-dimethylacetamide to form a dispersion , using an ultrasonic disperser (ultrasonic frequency 40kHz, ultrasonic temperature 70°C) to ultrasonically stir for 30 minutes, polyurethane (weight average molecular weight: 80,000) was added to the dispersion, and after sealing, it was continuously stirred for 8 hours with a magnetic stirring device, and finally prepared into Stable and uniform polymer spinning solution with a mass concentration of 15%;

[0058] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined n...

Embodiment 3

[0063] A composite nanofiber filter material with both photocatalytic / antibacterial functions and a preparation method thereof, the preparation method comprising the following steps:

[0064] 1) Spinning solution preparation: uniformly disperse titanium dioxide photocatalyst (addition amount 1.5wt%, particle size 18nm) and copper oxide antibacterial agent (addition amount 0.8wt%) in N, N-dimethylformamide to form a dispersed After ultrasonically stirring for 40 minutes with an ultrasonic disperser (ultrasonic frequency 35 kHz, ultrasonic temperature 50°C), 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. , finally prepared into a stable and uniform polymer spinning solution with a mass concentration of 18%;

[0065] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device...

technical field

[0001] The invention relates to a composite nanofiber filter material with both photocatalytic / antibacterial functions, in particular to a preparation method, that is, using a combined needle for electrospinning to realize the stretching of the spinning polymer solution at the tip of a solid metal wire The method is used to process the surface of the composite nanofiber filter material with microsolution at a certain release rate by recovering solvent vapor, which belongs to the field of functional filter materials. Background technique

[0002] Smog and PM2.5 have attracted more and more attention and attention, and the source and harm of smog have become more and more known to people. In addition to air pollution sources such as PM2.5, there are also volatile organic compounds such as formaldehyde and benzene, as well as pollutants such as bacteria, viruses, and fungi, which bring great harm to human health. Therefore, in addition to intercepting fine part...

Examples

Embodiment 1

[0049] A composite nanofiber filter material with both photocatalytic / antibacterial functions and a preparation method thereof, the preparation method comprising the following steps:

[0050]1) Spinning solution preparation: uniformly disperse titanium dioxide photocatalyst (addition amount 0.5wt%, particle size 10nm) and silver ion antibacterial agent (addition amount 0.5wt%) in formic acid to form dispersion liquid, utilize ultrasonic disperser ( Ultrasonic frequency 40kHz, ultrasonic temperature 80°C) after ultrasonic stirring for 20 minutes, nylon 6 (weight average molecular weight: 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 quality A polymer spinning solution with a concentration of 10%;

[0051] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined needle for elec...

Embodiment 2

[0056] A composite nanofiber filter material with both photocatalytic / antibacterial functions and a preparation method thereof, the preparation method comprising the following steps:

[0057] 1) Spinning solution preparation: uniformly disperse titanium dioxide photocatalyst (addition amount 1wt%, particle size 15nm) and zinc oxide antibacterial agent (addition amount 0.1wt%) in N, N-dimethylacetamide to form a dispersion , using an ultrasonic disperser (ultrasonic frequency 40kHz, ultrasonic temperature 70°C) to ultrasonically stir for 30 minutes, polyurethane (weight average molecular weight: 80,000) was added to the dispersion, and after sealing, it was continuously stirred for 8 hours with a magnetic stirring device, and finally prepared into Stable and uniform polymer spinning solution with a mass concentration of 15%;

[0058] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device, and the combined n...

Embodiment 3

[0063] A composite nanofiber filter material with both photocatalytic / antibacterial functions and a preparation method thereof, the preparation method comprising the following steps:

[0064] 1) Spinning solution preparation: uniformly disperse titanium dioxide photocatalyst (addition amount 1.5wt%, particle size 18nm) and copper oxide antibacterial agent (addition amount 0.8wt%) in N, N-dimethylformamide to form a dispersed After ultrasonically stirring for 40 minutes with an ultrasonic disperser (ultrasonic frequency 35 kHz, ultrasonic temperature 50°C), 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. , finally prepared into a stable and uniform polymer spinning solution with a mass concentration of 18%;

[0065] 2) Electrospinning: the prepared polymer spinning solution is sucked into the spinning module through the liquid supply device...

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