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Silk protein-based multi-functional nanofiber membrane for smoke filtration and preparation method thereof

A fibroin fiber and nanofiber membrane technology, which is applied in the preparation of spinning solution, single-component fibroin rayon, fiber processing, etc., can solve the problem of low mechanical properties of nanofiber membranes, poor self-supporting mechanical properties, Membrane mechanical properties are poor and other problems, to achieve long-term stable piezoelectric effect, good air permeability, good thermal stability

Inactive Publication Date: 2020-06-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the silk protein nanofiber membrane prepared by electrospinning with silk as the main raw material disclosed in the prior art has a stable and controllable structure and good biocompatibility, but the mechanical properties of the membrane are poor, and the self-supporting performance is poor, so it cannot be directly for air filtration
For example, the prior art discloses a silk protein fiber air filter material, which has a protective function against polluted air, but the preparation method of the regenerated silk protein is to dissolve the silk protein to the molecular scale, destroying the original natural structure of the silk protein, The structure of the prepared silk protein nanofiber membrane is different from the natural silk protein structure, resulting in low mechanical properties of the nanofiber membrane, and the silk protein nanofiber layer needs to be deposited on the supporting substrate, which has poor self-supporting mechanical properties and can only be Filter the polluted air through the physical barrier of the fiber layer, with a single function

Method used

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  • Silk protein-based multi-functional nanofiber membrane for smoke filtration and preparation method thereof
  • Silk protein-based multi-functional nanofiber membrane for smoke filtration and preparation method thereof
  • Silk protein-based multi-functional nanofiber membrane for smoke filtration and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: the preparation of pure silk protein nanofiber film

[0037] Firstly, boil the ginseng in 0.05wt% sodium carbonate aqueous solution for 60 minutes to remove sericin, wash it to obtain silk protein, and dry the silk protein in a vacuum oven at 35°C for 1 day. The fibroin fibers were then placed in CaCl 2 / FA(CaCl 2 3% by mass) in the system at 25°C for 60 minutes, the concentration of silk protein is 8wt%, and then it is placed in a petri dish to dry to form a film, and the dried film is soaked in deionized water, and the deionized water is constantly replaced until the CaCl 2Completely remove, secondary dry. The obtained silk protein film was dissolved in anhydrous formic acid with a mass fraction of 98% to obtain an 8 wt% silk protein formic acid solution. Then, using electrospinning technology, the spinning voltage is 20kV, the receiving distance is 12cm, the advancing speed of the silk protein formic acid solution is 0.5ml / h, the rotating speed of th...

Embodiment 2

[0038] Example 2: Preparation of degradable silk protein-based multifunctional nanofiber composite membrane

[0039] Firstly, boil the ginseng in 0.05wt% sodium carbonate aqueous solution for 60 minutes to remove sericin, wash it to obtain silk protein, and dry the silk protein in a vacuum oven at 35°C for 1 day. The fibroin fibers were then placed in CaCl 2 / FA(CaCl 2 3% by mass) in the system at 25°C for 60 minutes, the concentration of silk protein is 8wt%, and then it is placed in a petri dish to dry to form a film, and the dried film is soaked in deionized water, and the deionized water is constantly replaced until the CaCl 2 Completely remove, secondary dry. Add 1.2g of the obtained silk protein film and 0.024g of lithium niobate nanoparticles into 13.8g of 98% anhydrous formic acid, so that the concentration of silk protein in the spinning solution is 8wt%, and the doping amount of lithium niobate is 2wt%. Stir for 2 hours to obtain a homogeneous suspension. Then, u...

Embodiment 3

[0040] Example 3: Preparation of degradable silk protein-based multifunctional nanofiber composite membrane

[0041] Under the condition that the other conditions of Example 2 are kept constant, a comparative test is established as follows: 1.2 g of the obtained silk protein film and 0.072 g of lithium niobate nanoparticles are added to 13.8 g of 98% anhydrous formic acid to make the silk protein in the spinning solution The concentration is 8wt%, and the doping amount of lithium niobate is 6wt%, and stirred for 2 hours to obtain a uniform suspension. Then, by using the electrospinning technology, the self-supporting silk protein-based multifunctional nanofiber composite membrane can be obtained by controlling the spinning time.

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Abstract

The invention discloses a silk protein-based multi-functional nanofiber membrane for smoke filtration and a preparation method thereof. The preparation method comprises the following specific operation steps of doping functional nanoparticles into a silk protein spinning solution, obtaining the silk protein-based multi-functional nanofiber composite membrane through electrostatic spinning, soakingthe silk protein multifunctional nanofiber composite membrane obtained through electrostatic spinning in an ethanol solution for more than 30min, and pressing and drying to obtain the silk protein-based multi-functional nanofiber composite membrane. The nanofiber composite membrane provided by the invention has high filtration efficiency, good biocompatibility and good degradability, and also haspiezoelectric property and pyroelectric property, which can enhance the filtering effect on smoke.

Description

technical field [0001] The invention relates to an air filter material, in particular to a preparation method and application of a silk protein-based multifunctional nanofiber membrane. Background technique [0002] With the continuous and rapid development of my country's social economy, the burden of environmental pollution is also increasing, and the amount of substances continuously discharged into the atmosphere is increasing, causing rapid changes in the composition of the atmosphere, resulting in regional pollution events (haze pollution, photochemical smog, etc. ) occur frequently, seriously threatening the health of residents. As the chief culprit of severe smog weather and indoor pollution, PM 2.5 It has a greater impact on human health and the quality of the atmospheric environment. Compared with coarser atmospheric particulate matter, fine particulate matter has a smaller particle size, is rich in a large amount of toxic and harmful substances, and has a long res...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00D01D1/02D01C3/02D06M13/144D01F4/02B01D46/54
CPCB01D46/543D01C3/02D01D1/02D01D5/0015D01F4/02D04H1/728D06M13/144D10B2401/12
Inventor 刘磊王增凯
Owner JIANGSU UNIV
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