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Degradable bio-based air filter membrane and preparation method thereof

An air filtration, bio-based technology, applied in the field of air purification, can solve the problems of difficult product recycling and environmental pollution, etc.

Active Publication Date: 2016-05-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the current air filter materials are mainly prepared from synthetic fibers of plastics such as polypropylene and polytetrafluoroethylene, which brings difficulties to the recycling of discarded products, and improper handling can easily cause environmental pollution. Toxic solvents are generally used, and so far, the main function of air filter materials is to filter particulate impurities in the air. Few materials can achieve the adsorption of toxic and harmful gases without additives, let alone the realization of Multifunctional blocking and killing of bacteria and viruses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention discloses a degradable polymer air filter membrane, and the preparation raw materials include soybean protein, polyvinyl alcohol and acetic acid.

[0030] The specific formula is as follows: the soybean protein content is 85 wt%, the polyvinyl alcohol content is 15 wt%, and the solvent is acetic acid aqueous solution.

[0031] The preparation method of this air filter membrane is as follows: 2.60g soybean protein and 0.46g polyvinyl alcohol are dissolved in the acetic acid aqueous solution (V / V=8 / 2) of 20ml, stir to obtain uniform polymer solution, wherein the mass of soybean protein Accounting for 85wt% of the total solute, the mass of polyvinyl alcohol accounts for 15wt% of the total solute. The ratio of total solute to solvent is 0.153g / mL.

[0032] Use the above solution to prepare an air filter membrane by electrospinning. The electrospinning parameters are as follows: the spinning voltage is 23kv, the spinning solution flow rate is 0.4ml / h, the rece...

Embodiment 2

[0035] The invention discloses a degradable polymer air filter membrane, and the preparation raw materials include soybean protein, trehalose and polyvinyl alcohol.

[0036] The specific formula is as follows: the content of soybean protein is 60 wt%, the content of trehalose is 15 wt%, the content of polyvinyl alcohol is 35 wt%, and the solvent is acetic acid aqueous solution.

[0037] The preparation method of this air filter membrane is as follows: 1.84g soybean protein, 0.46g trehalose, 1.07g polyvinyl alcohol are dissolved in the acetic acid aqueous solution (V / V=8 / 2) of 20ml, stir to obtain uniform polymer solution, The mass of soybean protein accounts for 60 wt% of the total solute, the mass of trehalose accounts for 15 wt% of the total solute, and the mass of polyvinyl alcohol accounts for 35 wt% of the total solute. The ratio of total solute to solvent is 0.1685g / mL.

[0038] The above solution was used to prepare an air filter membrane by electrospinning. The electr...

Embodiment 3

[0042] The invention discloses a degradable polymer air filter membrane, and the preparation raw materials include soybean protein, methyl cellulose and polyvinyl alcohol.

[0043] The specific formula is as follows: the content of soybean protein is 55 wt%, the content of methyl cellulose is 25 wt%, the content of polyvinyl alcohol is 20 wt%, and the solvent is acetic acid aqueous solution.

[0044] The preparation method of this air filter membrane is as follows: 1.68g soybean protein, 0.77g methylcellulose, 0.61g polyvinyl alcohol are dissolved in the acetic acid aqueous solution (V / V=8 / 2) of 20ml, stir to obtain uniform polymer Solution, wherein the mass of soybean protein accounts for 55wt% of the total solute mass, the mass of methylcellulose accounts for 25wt% of the total solute mass, and the polyvinyl alcohol accounts for 20wt% of the total solute mass. The ratio of total solute to solvent is 0.153g / mL.

[0045]The above solution was used to prepare an air filter mem...

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Abstract

The invention belongs to the technical field of air purification and particularly provides a bio-based degradable efficient air-filtering fiber membrane material. This air-filtering fiber membrane is made by means of static spinning from bio-based polymer soy protein and polyvinyl alcohol as main materials and one or more of water-soluble natural polymer derivatives such as methylcellulose, chitosan and hydroxyethyl cellulose, as auxiliary materials, wherein the diameter of nano fiber is 100-1000 nm, the thickness of the fiber membrane is 20-1000 micrometers, and the fiber membrane is up to higher than 65% in porosity, 10-100 nanometers in pore size and up to higher than 90% in filtering efficiency. The bio-based degradable air filter membrane can be processed to serve for various purposes such as masks, screen windows and air purifiers, is safe and reliable and is low in cost; meanwhile, the preparation method is simple, the requirements on equipment is low, the production cost is low, the obtained air filter membrane has good filtering effect and high absorbing capacity, is degradable and recyclable and has promising market prospect.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a degradable bio-based fiber membrane material for air filtration and a preparation method thereof. Background technique [0002] In the past 20 to 30 years, the smog problem in the central and eastern regions of my country has become increasingly serious. PM2.5 and PM10 have seriously endangered human health and affected people's normal work and life. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, also known as particulate matter that can enter the lungs. Various toxic substances such as bacteria and viruses will cause various diseases of the respiratory system, immune system, and nervous system after being inhaled by the human body. [0003] In addition to PM2.5 and PM10, harmful gases in air pollution, formaldehyde released from home decoration materials and car interiors are also seriously endangering human he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/74B01D67/00B01D46/54B01D53/22
CPCB01D46/543B01D53/228B01D67/0002B01D71/74B01D2257/70B01D2259/4541B01D2325/44
Inventor 隋刚方群朱明仲伟虹杨小平吴剑桥
Owner BEIJING UNIV OF CHEM TECH
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