Silk nanofiber manufacturing method

A nanofiber and silk technology, applied in silk fiber production, chemical post-processing of fibers, fiber treatment, etc., can solve the problems of destroying silk structure and affecting subsequent use, and achieves the effect of simple equipment, easy control, and shortening of preparation time.

Inactive Publication Date: 2015-04-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can also break silk, they are all done in strong acid or alkali solution, which will inevitably destroy the structure of silk and affect its subsequent use.

Method used

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  • Silk nanofiber manufacturing method

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preparation example Construction

[0019] A preparation method of silk nanofibers. The preparation method refers to transferring the degummed silk to a solution composed of small molecular compounds, deionized water, and alcohol, and soaking to weaken the binding force between nanofibrils in the silk Then, the solution soaked with the silk is transferred to a crusher, and the soaked silk is mechanically crushed to obtain the silk nanofibers. The preparation method is carried out as follows:

[0020] a Take the degummed silk and wash it with deionized water and dry it at 20~30℃;

[0021] b. Add the degummed silk dried in step a to a solution composed of small molecule compounds and deionized water in a mass ratio of 0:1 to 1:200, and alcohols to deionized water in a mass ratio of 0:1 to 1:200 Soak in medium for 3~7h to swell the silk to weaken the binding force between the nanofibrils in the silk. The mass ratio of the solution to the degummed silk is 2000:1~1000:1;

[0022] c Transfer the solution with degumm...

Embodiment 1

[0031] a Take 1g of degummed silk and wash it with deionized water, then dry the washed silk at 30°C;

[0032] b. Add the degummed silk dried in step a to a solution consisting of 9.9g of calcium chloride, 1980.2g of ionized water, and 9.9g of ethanol and soak for 7 hours to weaken the binding force between nanofibrils in the silk;

[0033] c Transfer the solution with degummed silk treated in step b to a homogenizer for mechanical crushing for 4 hours;

[0034] d The solution after step c is separated by centrifugation or filtration to collect the product, and then the collected product is washed with deionized water, and the obtained silk nanofiber is dried at 20°C. As attached figure 1 Shown, attached figure 1 A scanning electron microscope image of the obtained silk nanofibers magnified 5000 times. The silk nanofibers have a diameter of 50-150nm and a length of 100nm-100μm, and the nanofibers are interlaced to form a network structure.

Embodiment 2

[0036] a Take 1g of degummed silk, wash it with deionized water, and dry it at 25°C;

[0037] b. Add the degummed silk dried in step a to a solution consisting of 1g calcium sulfate, 1492.6g ionized water, and 6.4g ethanol to soak for 5 hours to weaken the binding force between nanofibrils in the silk;

[0038] c Transfer the solution with degummed silk treated in step b to an emulsifier for mechanical crushing for 6 hours;

[0039] d The solution after step c is separated by centrifugation or filtration to collect the product, and then the collected product is washed with deionized water, and the obtained silk nanofiber is dried at 20°C. The obtained silk nanofiber has a diameter of 50-150nm and a length of 100nm-100μm.

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Abstract

The invention relates to a silk nanofiber manufacturing method, and belongs to the technical field of nano material manufacturing. The manufacturing method includes the steps that silk obtained after degumming treatment is transferred to a solution composed of an inorganic salt or weak acid or weak alkali small molecule compound, deionized water and alcohols, after binding force between nano fibrils in the silk is weakened through soaking, the silk solution is transferred to a high-voltage cell crushing machine or an emulsification machine or a pulp refiner or a crushing machine of a high-speed stirring device, and the soaked silk is mechanically crushed to obtain silk nanofibers. A silk nanofiber solution obtained through the method is similar to the shape of hydrogel, the silk nanofibers are obtained through centrifuging or filtering separation, manufacturing time is short, equipment is simple, operation influence factors are few, and control is convenient. The adopted small molecule compound avoids influences of strong acid or strong alkali on the silk nano fibrils, and the crushing machine can be used for quickly manufacturing the silk nanofibers on a large scale.

Description

technical field [0001] The invention relates to a method for preparing silk nanofibers, belonging to the technical field of nanomaterial preparation. technical background [0002] Silk is one of the earliest proteins used by human beings. It has good hygroscopicity and elegant luster, and is deeply loved by people. With the continuous in-depth research on it, the research field of its development and utilization is also expanding, gradually extending to food fermentation, biopharmaceuticals, environmental protection, energy utilization and other fields. To utilize silk fibroin, it is first necessary to reduce the size of silk fibroin to the micron or nanometer level. To achieve this purpose, people usually dissolve silk fibroin in a solvent. Generally, the solvents that can dissolve silk include acid, alkali, salt or enzyme solution, in which acid, alkali and enzyme degrade silk fibroin into small molecular peptide chains, It is not conducive to the formation of macromole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C3/00D01B7/00
CPCD01B7/00D01C3/00
Inventor 方东李力成徐卫林
Owner WUHAN TEXTILE UNIV
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