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Natural silk micro-nanofiber composite porous material and application thereof

A technology of micro-nano fiber and natural silk, which is applied in the field of porous materials, can solve the problems of being unable to be used as tissue engineering scaffold materials, airgel porous materials are unstable when exposed to water, and limited structural control, etc., and achieve high porosity and dust holding capacity High, low filter resistance effect

Active Publication Date: 2021-11-12
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyvinyl alcohol is soluble in water and is not easy to degrade, and the prepared airgel porous material is unstable in water, which will be greatly limited in filtration and cannot be used as a tissue engineering scaffold material; and polyvinyl alcohol is in When the mixed aqueous solution is made together with silk micro-nanofibers, and then freeze-dried, because it is a water-soluble material, the structural control of the silk micro-nanofiber airgel freezing process is limited. Therefore, the shape and strength of the airgel still need to be improved

Method used

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  • Natural silk micro-nanofiber composite porous material and application thereof
  • Natural silk micro-nanofiber composite porous material and application thereof
  • Natural silk micro-nanofiber composite porous material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of natural silk micro-nano fiber composite porous material is prepared through the following steps:

[0048] (1) Put 5g of degummed silk into swelling solution (a mixed solution of calcium nitrate, ethanol and water, the volume ratio of ethanol and water is 1:3, and the content of calcium nitrate is 5g:100mL) and place it in 60 ℃ oven for 24 hours, after taking it out, wash it with deionized water for 3 times, place it in a crusher with a cutter head speed of 8000r / min at a bath ratio of 1:150g / mL, and mechanically treat it for 60 minutes to obtain silk micro-nano fiber suspension.

[0049] (2) Chitosan was dissolved in 1% acetic acid solution, the rotating speed of the magnetic stirrer was 300 rpm, and stirred for 4 hours to obtain a chitosan solution with a concentration of 5 mg / mL.

[0050] (3) Add 0.5g of dry silk micro-nanofibers and 1mL of chitosan solution with a concentration of 5mg / mL into 99mL of deionized water, mix in a homogenizer at 800rpm for 30min...

Embodiment 2

[0052] A kind of natural silk micronanofiber composite porous material, compared with embodiment 1, difference is that in step (3), 0.5g dry state silk micronanofiber and 2.5mL concentration are chitosan of 5mg / mL The solution was added into 97.5 mL of deionized water, and mixed for 30 min in a homogenizer with a rotating speed of 800 rpm, and the mass concentration of the total solute after mixing was 0.5125%. Others are substantially the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0054] A natural silk micro-nano fiber composite porous material. Compared with Example 1, the difference is that in step (3), it is pre-frozen in liquid nitrogen for 30 minutes, and the frozen sample is taken out and placed at -50°C for 72 hours of freeze-drying. Others are substantially the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a natural silk micro-nanofiber composite porous material and application thereof. The preparation method comprises the following steps: fully and uniformly mixing a natural silk micro-nanofiber suspension with a chitosan acetic acid solution according to a certain mass ratio, and pre-freezing and freeze-drying to obtain a three-dimensional material with a porous structure. The added low-content chitosan is used as a high-molecular adhesive with high affinity of the silk nanofibers, so that the porous material can be endowed with good water resistance and mechanical properties. The prepared micro-nano fiber porous material has a high porous structure and a high specific surface area, is biodegradable, and is suitable for being used as a filtering material due to the fact that chitosan carries a large number of charges and has electrostatic adsorption performance. Meanwhile, the silk micro-nano fibrils and the chitosan have excellent biocompatibility and slow biodegradability, and also have good antibacterial and hemostatic properties, and the prepared porous material is suitable for being used as a biomedical material.

Description

technical field [0001] The invention relates to the technical field of porous materials, in particular to a natural silk micro-nano fiber composite porous material and its application. Background technique [0002] Micro-nano fibers have the characteristics of small pore size, large specific surface area, and high porosity, and have great application prospects in the field of filtration. More and more micro-nano microfibers are widely used in many purification products such as masks, automobile exhaust, and air purifiers. At the same time, due to the large specific surface area, high porosity and good pore connectivity of micro-nanofibers, they can be used as biological scaffolds in tissue engineering. Survival provides a good microenvironment. Porous materials prepared by micro-nano-scale ultrafine fibers have the advantages of low density, good permeability, large specific surface area, and strong cell adhesion ability, and have broad application prospects in the fields ...

Claims

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Application Information

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IPC IPC(8): B01D39/04A61L27/20A61L27/56A61L27/58
CPCB01D39/04A61L27/20A61L27/56A61L27/58B01D2239/0216B01D2239/0442
Inventor 尤仁传周顺顺李秀芳张强闫书芹
Owner WUHAN TEXTILE UNIV
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