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A silk fibroin nanofiltration membrane with micro-nano structure on the surface, preparation method and application thereof

A technology of micro-nano structure and nano-filtration membrane, applied in separation methods, dispersed particle filtration, chemical instruments and methods, etc., can solve the problems of low filtration efficiency, poor comprehensive filtration performance, large air resistance, etc., and achieve high filtration efficiency , Excellent overall filtration performance and low air resistance

Active Publication Date: 2020-04-03
EAST CHINA UNIV OF SCI & 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 by electrospinning polyacrylonitrile and polyimide. The common problems are low filtration efficiency, high air resistance, and poor comprehensive filtration performance. Therefore, it is necessary to Developed a new high-performance air filter material

Method used

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  • A silk fibroin nanofiltration membrane with micro-nano structure on the surface, preparation method and application thereof
  • A silk fibroin nanofiltration membrane with micro-nano structure on the surface, preparation method and application thereof

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Embodiment 1

[0026] (1) First put the natural silkworm silk into a boiled sodium carbonate solution with a mass percentage of 0.5%, degumming for 30 minutes, remove the surface sericin, and obtain silk fibroin after washing, place the silk fibroin in a vacuum at 30°C Vacuum-dry in an oven for 2 days; dissolve degummed silk fibroin in 9.5M lithium bromide aqueous solution at 60°C for 3 hours, filter and place the silk fibroin protein solution in a dialysis box to seal, and immerse in deionized water for dialysis. The dialysis time is 72 hours, and the water is changed every 3 hours to prepare a silk fibroin solution with a mass percentage of 5%; dissolve 0.8g polyethylene oxide in 9.2g deionized water, stir for 12 hours until completely dissolved, and obtain the mass percentage 8% polyethylene oxide solution.

[0027] (2) Mix 4g silk fibroin solution and 1g polyoxyethylene solution evenly, and carry out electrospinning after mixing for 30 minutes, the spinning voltage is 7kV, the receiving ...

Embodiment 2

[0029] (1) First put the natural silkworm silk into a boiled sodium carbonate solution with a mass percentage of 0.5%, degumming for 60 minutes, remove the surface sericin, and obtain silk fibroin after washing, place the silk fibroin in a vacuum at 30°C Vacuum-dry in an oven for 2 days; dissolve degummed silk fibroin in 9.5M lithium bromide aqueous solution at 60°C for 3 hours, filter and place the silk fibroin protein solution in a dialysis box to seal, and immerse in deionized water for dialysis. The dialysis time is 48 hours, and the water is changed every 3 hours to prepare a silk fibroin solution with a mass percentage of 9%; dissolve 0.4 g of polyethylene oxide in 9.6 g of deionized water, stir for 12 hours until completely dissolved, and obtain the mass percentage 4% polyethylene oxide solution.

[0030] (2) Mix 4g silk fibroin solution and 1g polyoxyethylene solution evenly, and carry out electrospinning after mixing for 30 minutes. The spinning voltage is 13kV, the r...

Embodiment 3

[0032] (1) First put the natural silkworm silk into a boiled sodium carbonate solution with a mass percentage of 0.5%, degumming for 60 minutes, remove the surface sericin, and obtain silk fibroin after washing, place the silk fibroin in a vacuum at 30°C Vacuum dry in an oven for 2 days; dissolve degummed silk fibroin in 9M lithium bromide aqueous solution at 60°C for 3 hours, filter and place the silk fibroin protein solution in a dialysis box to seal, and immerse in deionized water for dialysis, dialysis The time is 72 hours, the water is changed every 6 hours, and a silk fibroin solution with a mass percentage of 8% is prepared; 0.8g polyvinyl alcohol is dissolved in 9.2g deionized water, stirred for 12 hours until completely dissolved, and the mass percentage is obtained. 8% polyvinyl alcohol solution.

[0033] (2) Mix 2g of silk fibroin solution and 2g of polyvinyl alcohol solution evenly, and perform electrospinning after mixing for 30 minutes. The spinning voltage is 10...

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Abstract

The invention discloses a silk fibroin nanofiltration film with the surface with a micro-nano structure as well as a preparation method and application of the silk fibroin nanofiltration film. The preparation method comprises the following specific operation steps: uniformly mixing a silk fibroin solution obtained from silk through degumming, dissolving, dialysis, filtration, centrifugation and concentration with a polymer solution, and carrying out electrostatic spinning and after-treatment, so as to prepare the silk fibroin nanofiltration film with the surface with the micro-nano structure, wherein the diameters of nanofibers are 100nm-1000nm, the thickness of the film is 2-10 microns, the porosity of a fiber film is 60%-85%, the pore size is 20nm-500nm, and the filtration efficiencies of the film to PM2.5 and PM10 can reach above 99%. The preparation method is simple in process, the process is non-toxic and environment-friendly, and the silk fibroin nanofiltration film has wide application prospects in the fields of personal and industrial air filtration equipment.

Description

technical field [0001] The invention belongs to the technical field of filter material preparation, and in particular relates to a silk fibroin nanofiltration membrane with a micro-nano structure on the surface, a preparation method and an application thereof. Background technique [0002] In recent years, with the development of urban industry, the problem of air pollution has become increasingly serious, and has become one of the most serious environmental problems in society. As the culprit of severe smog weather, PM2.5 refers to ultrafine particles with a particle size of less than 2.5 microns, which has a large specific surface area and is easy to absorb a large amount of toxic and harmful substances. It can enter the respiratory system through the alveoli and improve heart health. Incidence of vascular disease and respiratory disease. To a certain extent, urban living is deviating from the goal of health that people are pursuing. Although traditional mask filter mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D46/54B01D67/00B01D71/06
CPCB01D46/0036B01D46/543B01D46/546B01D67/0002B01D71/06
Inventor 张玲李春忠高小超苟静
Owner EAST CHINA UNIV OF SCI & TECH