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Degradable filtration and sterilization membrane and preparation method

A technology for filtering, sterilizing and degrading fat, which is applied in the field of air purification, can solve the problem that a filter membrane cannot actively protect indoor air from cleaning, etc., and achieves the effects of good market prospects, high adsorption and antibacterial efficiency, and low production cost.

Pending Publication Date: 2018-11-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the filter membrane in the prior art cannot fundamentally and actively protect the cleanliness of the indoor air, the present invention provides a degradable filter and sterilization membrane and its preparation method

Method used

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  • Degradable filtration and sterilization membrane and preparation method
  • Degradable filtration and sterilization membrane and preparation method
  • Degradable filtration and sterilization membrane and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Dissolve polylactic acid in a mixed solvent of dimethylformamide and dichloromethane (mass ratio 3:1), stir magnetically at room temperature for 12 hours, and stir evenly to obtain polylactic acid with a mass concentration of polylactic acid of 0.1 g / mL Spinning solution C;

[0034] (2) Add titanium dioxide particles with a particle diameter of 100 nm into the polylactic acid solution in step (1), the amount of titanium dioxide particles added is 40% of the mass of the polylactic acid, and magnetically stir for 6 hours to evenly obtain solution D;

[0035] (3) Electrospinning is carried out with solution D, with a stainless steel drum as the receiving device, the drum rotation rate is 100rpm, the spinning solution flow rate is 0.5mL / h, the voltage is 7kV, the receiving distance is 30cm, and the spinning is 5min, and the thickness of 10μm is prepared. Electrospun fiber membrane;

[0036] (4) The porosity of the polylactic acid nanofiber membrane prepared in step (3)...

Embodiment 2

[0038] (1) Dissolve polylactic acid in a mixed solvent of dimethylformamide and dichloromethane (mass ratio 3:1), stir magnetically at room temperature for 12 hours, and stir evenly to obtain polylactic acid with a mass concentration of polylactic acid of 0.2 g / mL Spinning solution C;

[0039] (2) Ultrasonic dispersion of graphene with sheet size 10nm in a mixed solvent of dimethylformamide and dichloromethane (mass ratio 3:1), then added to step (1) polylactic acid solution, the amount of graphene 1% of the mass of polylactic acid, magnetically stirred for 12 hours and stirred evenly to obtain solution D;

[0040] (3) Electrospinning is carried out with solution D, with a stainless steel drum as the receiving device, the drum rotation rate is 600rpm, the spinning solution flow rate is 5mL / h, the voltage is 20kV, the receiving distance is 15cm, and the spinning is 30min to prepare an electrospinning electrode with a thickness of 100μm. Spun fiber membrane;

[0041] (4) The p...

Embodiment 3

[0043] (1) Dissolve polyvinyl alcohol in deionized water, stir magnetically at room temperature for 8 hours, and stir evenly to obtain polyvinyl alcohol spinning solution C with a mass concentration of polyvinyl alcohol of 0.05 g / mL;

[0044] (2) Add the CdS of particle diameter 50nm and the zinc oxide of particle diameter 100nm respectively in the polyvinyl alcohol solution of step (1) gained, the addition of nanometer CdS is 5% of polyvinyl alcohol quality, the addition of nanometer zinc oxide 15% of the mass of polyvinyl alcohol, magnetically stirred for 6 hours and stirred evenly to obtain solution D;

[0045] (3) Electrospinning is carried out with solution D, with a stainless steel drum as the receiving device, the drum rotation rate is 300rpm, the spinning solution flow rate is 2mL / h, the voltage is 16kV, the receiving distance is 10cm, and the spinning is 15min to prepare electrospinning with a thickness of 50μm. Spun fiber membrane;

[0046](4) The porosity of the po...

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Abstract

The invention discloses a degradable filtration and sterilization membrane and a preparation method. The filtration and sterilization membrane is prepared by electrostatic spinning of the following ingredients in parts by weight: 100 parts of degradable high polymer material and 1-60 parts of antibacterial nano auxiliary material, wherein the degradable high polymer material is one or a combination of degradable aliphatic polyester and a degradable natural polymer; and the antibacterial nano auxiliary material is one or a combination of graphene, graphite oxide, titanium dioxide, zinc oxide, Fe2O3, CdS and WO3. The degradable filtration and sterilization membrane is prepared by the electrostatic spinning of a degradable high polymer solution; at the same time, the antibacterial nano auxiliary material is added in a preparation process; and the membrane has the advantages of large air contact area, high absorption and antibacterial efficiency, easy recovery, no secondary pollution, recycling and the like.

Description

technical field [0001] The invention relates to the technical field of air purification, and more particularly relates to a degradable filtration and sterilization membrane and a preparation method thereof. Background technique [0002] With the rapid development of modern urbanization economy, the pollution caused by people to the environment is also becoming more and more serious. In recent years, more and more cities have experienced large-scale and persistent smog weather, which has caused serious harm to people's daily life and health. Haze weather is a general term for a state of air pollution, in which suspended particles (PM2. Take precautions. Compared with outdoor protection, indoor protection is also very important. However, for residents living in smog-polluted cities, opening windows for ventilation is good for health and indoor ventilation, but at the same time, it will also bring tiny particles in the air into the room, causing indoor air pollution. With t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/54B01D39/14A61L9/00A61L101/02A61L101/04A61L101/30A61L101/28A61L101/14
CPCB01D39/14B01D46/0001B01D46/0028B01D46/0036B01D46/543B01D46/546B01D2279/40
Inventor 张立群宫敏韩凯
Owner BEIJING UNIV OF CHEM TECH
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