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Silk fibroin nanometer fiber filtering material and air filtering equipment based on filtering material

A silk fibroin and nanofiber technology, applied in filtration and separation, membrane filter, dispersed particle filtration, etc., can solve the problems of limited application of silk fibroin material, unsuitable for long-term use, weak intermolecular binding force, etc. Structural controllability, environmental friendliness, rich source effects

Active Publication Date: 2018-08-10
北京清科丝宇技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mulberry silk has problems such as water shrinkage, high fiber brittleness, and poor mechanical properties.
Materials of different forms, such as membranes, non-woven nets and porous scaffolds, which are directly dried under the existing technical conditions, electrospinning or freeze-drying from the regenerated silk fibroin solution, mostly have random coils in their aggregated structures. , the binding force between molecules is weak, and the dissolution rate in water is large, which limits the application of silk fibroin materials in biomedical materials
CN201610539592.3 Air filtration equipment based on silk nanofibers, but its filtration efficiency is unstable in high humidity environment, so it is not suitable for long-term use

Method used

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  • Silk fibroin nanometer fiber filtering material and air filtering equipment based on filtering material
  • Silk fibroin nanometer fiber filtering material and air filtering equipment based on filtering material
  • Silk fibroin nanometer fiber filtering material and air filtering equipment based on filtering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Preparation of silk fibroin nanofiber film using cocoon silk as raw material by using roll-type receiving electrospinning equipment

[0044] Firstly, silkworm cocoons were boiled in 0.5wt% sodium bicarbonate aqueous solution for 30min to remove sericin, and then silk fibroin fibers were soaked in CaCl 2 / C 2 h 5 OH / H 2 O (molar ratio 1:2:8) was dissolved in a ternary salt solution system at 80°C for 2 hours, and then dialyzed in deionized water for three days to obtain an aqueous silk fibroin solution. The silk fibroin solution was centrifuged at 3500r / min for 5 minutes to remove precipitation. Put the silk fibroin solution in a refrigerator at -4°C to freeze into ice, and then freeze-dry to obtain a silk fibroin sponge. The obtained silk fibroin sponge is dissolved in 98-100% anhydrous formic acid to obtain a 20 wt% silk fibroin formic acid solution. Then, using electrospinning technology, the working voltage is positive high voltage 20kV, negative high...

Embodiment 2

[0049] Embodiment 2: The silk fibroin nanofiber film that ethanol and steam treatment prepare

[0050] Under the electrospinning condition described in embodiment 1, with 10g / m 2 The non-woven fabric is used as the substrate for silk fibroin nanofibers, and the silk fibroin nanofiber membrane with an electrospinning time of 50 minutes is made into a filter with a sandwich structure of "non-woven fabric + silk fibroin nanofiber membrane + non-woven fabric" After soaking in ethanol for 30s and drying, perform one or more water vapor treatments for 30s and dry, and place it in a simulated mask wearing environment (85% high humidity environment, 25°C normal temperature), in this temperature and humidity environment, Test the filtration efficiency of the filter sheet at 0, 1, 2, 4, 8, 15, 30, and 60 minutes, as shown in Table 2. Compared with the untreated silk fibroin nanofiber membrane, the filtration efficiency after treatment with ethanol and steam The retention time of the fi...

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Abstract

The invention provides a silk fibroin nanometer fiber filtering material and air filtering equipment based on the filtering material. The silk fibroin nanometer fiber filtering material provided by the invention is obtained by combining a static spinning technology with ethanol and water vapor through post treatment, and has the advantages of environment-friendly effect, high biocompatibility, high filtering efficiency and the like.

Description

technical field [0001] The invention relates to a silk fibroin nanofiber filter material and an air filter device based on the filter material. Background technique [0002] In recent years, air pollution, especially particulate air pollution (smog) has become an important environmental problem. PM2.5 and smaller particles can enter the alveoli of the human body, and even pass through the cell membrane into other organs, posing a serious threat to human health. How to effectively protect against smog has attracted widespread attention, and the development of new PM2.5 protective masks with high efficiency and low resistance has become a market demand. [0003] With the development of nanotechnology, electrospinning technology has become the main method for preparing nanofibers. As an air filter material, electrospinning nanofibers have the advantages of large specific surface area and strong adsorption capacity, which can effectively improve the filtration efficiency of fine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/04B01D46/30
CPCB01D39/04B01D46/30B01D2239/0631B01D2239/10B01D2258/06
Inventor 杨德智张清卿
Owner 北京清科丝宇技术有限公司