Preparation method of fibroin nanofibers

A technology of nanofiber and silk fibroin, which is applied in fiber processing, fiber chemical characteristics, filament/thread forming, etc., can solve problems such as complex process, and achieve the effect of excellent performance, small fiber diameter and stable structure

Inactive Publication Date: 2014-12-24
SUZHOU INSILK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main method of preparing silk fibroin nanofibers by electrospinning is to dissolve the dialysis silk fibroin solution into a film and then dissolve it in a spinning solvent to prepare a spinning solution, and then obtain regenerated silk fibroin nanofibers by electrospinning , the process is more complicated, and the obtained fiber cross-section is mostly circular

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use 0.05g / L sodium carbonate solution to remove sericin on the surface of 10g silk, wash it with deionized water and dry it, then dissolve it in 100ml of CaCl 2 \C 2 h 5 OH\H 2 In the ternary solution of O, obtain the silk fibroin inorganic salt mixed solution, utilize the dialysis bag to obtain the 6ml silk fibroin solution that mass fraction is 10% after dialysis;

[0022] The silk fibroin solution and HFIP were mixed at a volume ratio of 1:5, stirred for 60 minutes, and transferred to the syringe of a triangular cross-section nozzle. Under the action of a 10kV / cm high-voltage electric field, the spinning solution was ejected from the nozzle to form silk fibroin nanofibers. Observation by SEM shows that the average diameter of the fiber is about 600nm, and the cross section is mostly obtuse triangle.

Embodiment 2

[0024] Use 0.07g / L sodium carbonate solution to remove sericin on the surface of 10g silk, wash it with deionized water and dry it, then dissolve it in 80ml of CaCl 2 \C 2 h 5 OH\H 2 In the ternary solution of O, obtain the silk fibroin inorganic salt mixed solution, utilize the dialysis bag to obtain the 4ml silk fibroin solution that mass fraction is 30% after dialysis;

[0025] The silk fibroin solution and HFIP were mixed at a volume ratio of 1:10, stirred for 30 minutes, and transferred to the syringe of a triangular cross-section nozzle. Under the action of a 60kV / cm high-voltage electric field, the spinning solution was ejected from the nozzle to form silk fibroin nanofibers. Observation by SEM shows that the average diameter of the fiber is about 100nm, and the cross section is mostly acute triangle.

Embodiment 3

[0027] Use 0.05g / L sodium carbonate solution to remove sericin on the surface of 10g silk, wash it with deionized water and dry it, then dissolve it in 90ml of CaCl 2 \C 2 h 5 OH\H 2 In the ternary solution of O, obtain the silk fibroin inorganic salt mixed solution, utilize the dialysis bag to obtain the 5ml silk fibroin solution that mass fraction is 20% after dialysis;

[0028] The silk fibroin solution and HFIP were mixed at a volume ratio of 1:8, stirred for 50 minutes, and transferred to the syringe of a triangular cross-section nozzle. Under the action of a 45kV / cm high-voltage electric field, the spinning solution was ejected from the nozzle to form silk fibroin nanofibers. Observation by SEM shows that the average diameter of the fiber is about 300nm, and the cross section is mostly acute triangle.

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Abstract

The invention discloses a preparation method of fibroin nanofibers. The preparation method comprises the following steps: (1) degumming silk by an alkaline process to remove sericin on the surface of the silk, washing the silk with deionized water, drying the silk, dissolving the dried silk in a CaCl2\C2H5OH\H2O ternary solution or a lithium bromide solution to obtain a fibroin and inorganic salt mixed solution, and dialyzing by a dialysis bag to obtain a fibroin solution; (2) mixing the fibroin solution with a spinning solvent in a volume ratio, and stirring for 30-60 minutes for mixing uniformly; and (3) transferring an obtained spinning solution into a cylinder with a nozzle with triangular cross section, and spraying the spinning solution out of the nozzle under the action of a high voltage electric field to form the nanofibers. The preparation method is simple and convenient to operate, the obtained fibroin nanofibers are good in spinnability, the specifications of the fibers can be adjusted by adjusting spinning parameters, and the fibers have the characteristics of small diameter, excellent performance, stable structure and glittering effect.

Description

Technical field: [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing silk fibroin nanofibers. Background technique: [0002] As a natural fiber with excellent performance, silk has been widely used in textiles, biomedicine, military aerospace and other fields. With the continuous development of science and technology, silk fibers with different specifications and performances are more and more widely demanded. Therefore, the technology of remolding using silk as raw material is well known. [0003] Using CaCl 2 \C 2 h 5 OH\H 2 O ternary solution or lithium bromide solution to dissolve silk fibroin has become a common method for dissolving silk fibroin because of its simple solvent preparation, easy process operation, environmental protection, low cost, and little impact on silk fibroin structure. [0004] There are mainly the following methods for preparing nanofibers: stretching method, template method, electros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F4/00D01D5/253
Inventor 周继东
Owner SUZHOU INSILK CO LTD
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