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Novel haze efficient filtering silver nanowire net and mofs composite porous fiber membrane material and its preparation method

A high-efficiency filtration, porous fiber technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of non-hygienic requirements, poor filtration effect, difficult to remove, etc., to achieve good tensile strength, avoid falling off, The effect of preventing the growth of bacteria

Active Publication Date: 2020-12-25
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the filter layer of masks currently on the market blocks particulate matter in the air, the filtered particles and bacteria are easily attached to the mask filter near the mouth and nose, causing bacteria to grow and form secondary pollution. These bacteria and particles penetrate into the human body through the mask filter, causing harm to the human body and not meeting the hygienic requirements; the pure sterilization masks on the market have problems such as poor filtering effect, and the micron-level pores of conventional masks are difficult to remove smog Harmful gaseous substances such as nitrogen oxides, sulfur oxides and organic volatiles in the components

Method used

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  • Novel haze efficient filtering silver nanowire net and mofs composite porous fiber membrane material and its preparation method
  • Novel haze efficient filtering silver nanowire net and mofs composite porous fiber membrane material and its preparation method
  • Novel haze efficient filtering silver nanowire net and mofs composite porous fiber membrane material and its preparation method

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Effect test

Embodiment 1

[0041] A method for preparing a novel smog efficient filter silver nanowire network and MOFs composite porous fiber film material, comprising the following steps:

[0042] (1) Preparation of spinning precursor solution: Weigh 1g of PVP powder and add it to 9g of ethanol, stir magnetically for 12h, and let stand for 2h to obtain spinning precursor solution;

[0043] (2) Preparation of spinning solution: Mix 0.05g of silver nanowires with the spinning precursor solution and stir magnetically for 2h to obtain a PVP-ethanol-silver nanowire dispersion; then weigh 0.05g of MOF-5 powder and add 5g In the PVP-ethanol-silver nanowire dispersion, magnetically stirred for 3 hours to prepare a spinning solution, the composition of the spinning solution is PVP-ethanol-MOF-5-silver nanowire dispersion;

[0044] (3) Electrospinning: Add the spinning solution (PVP-ethanol-MOF-5-silver nanowire dispersion) into the spinning equipment, and perform electrospinning to prepare a mixed fiber film; ...

Embodiment 2

[0046] A method for preparing a novel smog efficient filter silver nanowire network and MOFs composite porous fiber film material, comprising the following steps:

[0047] (1) Preparation of spinning precursor solution: Weigh 1g of PVP powder and add it to 9g of ethanol, stir magnetically for 12h, and let stand for 2-5h to obtain spinning precursor solution;

[0048] (2) Preparation of spinning solution: Mix 0.05g silver nanowire with spinning precursor solution, stir magnetically for 2h to obtain PVP-ethanol-silver nanowire dispersion; weigh 0.05g of MOF-5 powder and add 5g of During the mixing of the spinning precursor solution, magnetically stir for 3 hours to prepare a PVP-ethanol-MOF-5 dispersion;

[0049] (3) Electrospinning: adding the spinning solution (PVP-ethanol-silver nanowire dispersion and PVP-ethanol-MOF-5 dispersion) into the spinning equipment, and performing electrospinning to prepare a mixed fiber film; Electrospinning process control conditions: the voltag...

Embodiment 3

[0053] A method for preparing a novel smog efficient filter silver nanowire network and MOFs composite porous fiber film material, comprising the following steps:

[0054] (1) Preparation of spinning precursor solution: Weigh 1g of PVP powder and add it to 9g of ethanol, stir magnetically for 12h, and let stand for 2-5h to obtain spinning precursor solution;

[0055] (2) Preparation of spinning solution: Mix 0.05g of silver nanowire with spinning precursor solution, and magnetically stir for 2h to obtain spinning solution, which is composed of PVP-ethanol-silver nanowire dispersion;

[0056] (3) Electrospinning: the spinning solution (PVP-ethanol-silver nanowire dispersion) is added to the spinning equipment for electrospinning to prepare a mixed fiber film; the control conditions of the electrospinning process: the voltage is set to 15kv, the distance between the injector and the collector is 15cm, the flow rate is set to 1mL / h, the left and right swing distance is 10cm, the ...

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Abstract

The invention provides a method for preparing a novel smog efficient filtering silver nanowire network and MOFs composite porous fiber membrane material, which is characterized in that it comprises the following steps: preparation of silver nanowires, preparation of MOFs, preparation of spinning precursor solution Preparation, preparation of spinning solution, electrospinning, preparation of dispersion by suction filtration, coating by suction filtration. The beneficial effect of the present invention is that: the preparation method of a novel smog efficient filtering silver nanowire network and MOFs composite porous fiber film material of the present invention utilizes silver nanowires of a certain diameter and MOFs of a certain particle size for doping preparation Composite fiber membranes use the pore size of the fiber membranes formed by spinning to filter, and at the same time, by applying a small voltage, the remote electrostatic force of silver nanowires is used to collect particles and improve the filtering effect, and because silver nanowires themselves have a bactericidal function , so it can achieve the effect of multi-functional filtering haze.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency smog filtration, and relates to a composite material for high-efficiency smog filtration, in particular to a novel high-efficiency smog filtration silver nanowire net and MOFs composite porous fiber film material and a preparation method thereof. Background technique [0002] In recent years, my country's air pollution events represented by smog weather have become one of the most significant social problems affecting people's physical and mental health and daily life order. Smog weather presents a high-frequency trend in North China, Northwest my country, and even south of the Yangtze River. It not only endangers people's physical and mental health, but also has a certain negative impact on my country's image in the international community. [0003] Smog refers to the collection of tiny dust particles, smoke particles or salt particles suspended in the atmosphere (PM for short), such as d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2257/302B01D2257/40B01D2257/70B01J20/226B01J20/28033B01J20/28057
Inventor 张文彦范亚苛郝泽泽刘亚男王尧宇钟凯苟晓杰
Owner NORTHWEST UNIV
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