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Nano metal aerogel sterilizing and filtering material, preparation method thereof and protective mask

A nano-metal and filter material technology, applied in the field of materials, can solve problems such as difficulty in breathing, high equipment requirements, and reduced sterilization function, and achieve the effects of simple production process, low environmental and equipment requirements, and good strain recovery characteristics.

Active Publication Date: 2020-07-03
HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano silver-based filtration and purification materials disclosed in existing patents often have obvious limitations
For example, the nano-silver layer made by direct spraying of nano-silver particles or nano-silver wires is often thin and sparse in structure, which cannot ensure sufficient contact with pathogens; excessive coating of nano-silver and nano-silver wires will reduce the flexibility of the material and cause damage. Difficulty in breathing; nano-silver composites prepared with activated carbon, nanofibers, etc. produce adverse health effects and even cause heavy metal poisoning
On the other hand, due to the difficulty of storing static electricity and the poor conductivity of commonly used filter fibers, high voltage must be applied to obtain a stable electrostatic field or directional electric field, which requires high equipment requirements and is easy to harm ordinary users. By applying a strong electrostatic field and The method of directing the electric field to achieve antibacterial and antiviral properties has not been widely used

Method used

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  • Nano metal aerogel sterilizing and filtering material, preparation method thereof and protective mask
  • Nano metal aerogel sterilizing and filtering material, preparation method thereof and protective mask
  • Nano metal aerogel sterilizing and filtering material, preparation method thereof and protective mask

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A nano-silver wire airgel sterilizing filter, the preparation method of which comprises:

[0063] (1) The hydrolyzate of lignin and cellulose (2g) was used as three-dimensional growth active agent, PVP (3.5g) was used as surfactant and reducing agent, silver nitrate (3g) was used as precursor, ethylene glycol (100 ml) As a solvent and a 304 stainless steel reactor as a container, a liquid-phase reduction reaction was induced at 140 °C to prepare a nano-silver wire gel structure, the overall thickness of which was 30 mm, the diameter of the nano-wire was 20 nm, and the average interspace between The size is about 100 nm.

[0064] (2) Use sodium chloride solution (1M) to wash the obtained silver nanowire gel tissue to remove the residual reaction reagents and free nanowire monomers in it, and pass CO 2 Nano-silver wire airgel was obtained by supercritical drying technology, and then cut with a low-power laser to obtain a 0.1 mm-thick nano-silver wire airgel film. Among ...

Embodiment 2

[0068] A nano-copper wire airgel sterilizing protective mask, the preparation method of which comprises:

[0069] (1) The partial hydrolyzate of glutamic acid and alanine (1.5 g) was used as three-dimensional growth active agent, copper nitrate (0.1mol / L, 10 ml) was used as precursor, hydrazine hydrate (35 wt.%, 0.25 ml ) as a reducing agent and ethylenediamine (1.5 ml) as a surfactant were added to a sodium hydroxide (15 mol / L, 200 ml) solution, and the liquid-phase reduction was induced in a polytetrafluoroethylene reaction tank at 175°C Reacting to prepare a nanocopper wire gel tissue, the overall thickness is 25 mm, the diameter of the nanowires is 250 nm, and the average size of the gaps between the nanowires is about 2 microns.

[0070] (2) Using sodium citrate (2.5 g) as the surfactant and reducing agent, silver nitrate (3 g) as the precursor, and ethylene glycol (100 ml) as the solvent, silver nanoparticles were prepared in a glass reactor at 160 °C Particles, during ...

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Abstract

The invention provides a nano metal aerogel sterilizing and filtering material, a preparation method thereof and a protective mask. The nano metal aerogel sterilizing and filtering material comprisesa nano metal aerogel layer and a conductive electrode, and the conductive electrode is electrically connected with nano metal aerogel. The interior of the nano metal aerogel layer comprises a three dimensional nano network composed of metal nano wires with a sterilization function. The nano metal aerogel sterilizing and filtering material is large in specific surface area and high in activity, a large number of sterilizing metal ions can be directly formed by a nano wire network in the nano metal aerogel sterilizing and filtering material under the action of air and water vapor exhaled by a human body, and the nano metal aerogel sterilizing and filtering material has an excellent sterilizing performance and strong high conductive capacity, and can be connected to a power supply so as to load a strong electrostatic field or a directional electric field. The adsorption capacity and the killing effect on micro-nano particles, bacteria and viruses are improved, and the material can be repeatedly used. Meanwhile, the network gap of the material is small, the space density is low, free circulation of air is guaranteed, blockage caused by particulate pollutants is relieved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a nanometer metal airgel sterilizing filter material, a preparation method thereof, and a protective mask. Background technique [0002] With the advancement of environmental technology and biotechnology, humans have gradually realized the toxic effects and threats of dust, fine particles, bacteria, fungi, molds, viruses and other atmospheric floating objects and microorganisms on human health. The public is concerned about air pollution (such as PM2.5 Exceeding the standard) and outbreaks of respiratory infectious diseases that occur from time to time are becoming more and more worrying. The use of air filter materials and protective masks is an effective way to isolate / prevent pollutants in the air and protect one's own health. It has been widely used in daily life, especially in the prevention and treatment of new coronary pneumonia in 2020. Masks and related ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/00B01D46/54A41D13/11A41D31/30A41D31/02
CPCB01D46/0001B01D46/0028B01D46/0032A41D13/11A41D31/305B01D46/543
Inventor 祝温泊李明雨王晓婷顾佳慧
Owner HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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