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Method for preparing colored sodium alginate nano fibrous membrane by electrostatic spinning process

A nanofiber membrane and sodium alginate technology, which is applied in the direction of adding dyes to alginate artificial filaments, textiles, papermaking, and spinning solutions, can solve the problem of poor color fastness of nanofiber membrane products, sodium alginate Poor dyeing performance, complex dyeing process and other problems, to achieve the effect of enriching product color series, increasing industrial added value, and shortening the process flow

Active Publication Date: 2017-03-08
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor dyeing performance of sodium alginate, the post-dyeing process is complicated and cumbersome, and the color fastness of the dyed nanofiber membrane product is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In the first step, according to the volume ratio of 0.95:0.05, measure 950ml of deionized water and 50ml of ethanol respectively, and prepare a mixed solution by stirring;

[0051] In the second step, according to the ratio of mass ratio 1:0.1, measure 30g of sodium alginate (the weight average molecular weight is 250,000, G / M is 0.5) and 3g of cationic turquoise blue GB respectively, and set aside;

[0052] Then, the cationic turquoise blue GB was added to the above-mentioned ethanol aqueous solution, and the pH value was adjusted to 8 with 0.1M NaOH solution, and the sodium alginate powder was added to the above solution to fully dissolve to prepare a mixed solution, and then the pH of the mixed solution was adjusted with Slowly adjust the 0.1M hydrochloric acid solution to 3, and stir to prepare a mixed solution with a concentration of 3% sodium alginate by mass;

[0053] Filter the obtained mixed solution, and quickly defoam under a vacuum of 120Pa to obtain the spi...

Embodiment 2

[0057] In the first step, according to the volume ratio of 0.8:0.2, measure 800ml of deionized water and 200ml of ethanol respectively, and prepare a mixed solution by stirring;

[0058] In the second step, according to the ratio of mass ratio 1:0.05, measure 10g of sodium alginate (weight average molecular weight is 300,000, G / M is 0.8) and 0.5g cationic blue GRRL respectively, and set aside;

[0059] Then, add cationic blue GRRL to the above-mentioned aqueous ethanol solution, and adjust the pH value to 8 with 0.1M NaOH solution, add sodium alginate powder to the above solution and fully dissolve to prepare a mixed solution, and then adjust the pH of the mixed solution with 0.1 The M hydrochloric acid solution is slowly adjusted to 4, and after stirring, it is mixed with a sodium alginate mass percentage concentration of 1%;

[0060] The obtained mixed solution is filtered and degassed rapidly under a vacuum of 150 Pa to obtain a spinning stock solution;

[0061] The third ...

Embodiment 3

[0064] In the first step, according to the volume ratio of 0.7:0.3, measure 700ml of deionized water and 300ml of ethanol respectively, and prepare a mixed solution by stirring;

[0065] In the second step, according to the ratio of mass ratio 1:0.01, measure 10g of sodium alginate (weight average molecular weight is 350,000, G / M is 0.6) and 0.1g of cationic golden yellow X-GL respectively, and set aside;

[0066] Then, add cationic golden yellow X-GL to the above-mentioned ethanol aqueous solution, and adjust the pH value to 8.5 with 0.1M NaOH solution, add sodium alginate powder to the above solution and fully dissolve to prepare a mixed solution, and then adjust the pH of the mixed solution Slowly adjust to 5 with 0.1M hydrochloric acid solution, and stir to prepare a mixed solution with a concentration of 1% by mass of sodium alginate;

[0067] Filter the obtained mixed solution, and quickly defoam under a vacuum of 200 Pa to obtain the spinning stock solution;

[0068] T...

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Abstract

The invention discloses a method for preparing a colored sodium alginate nano fibrous membrane by an electrostatic spinning process. According to the method, a water-soluble cationic dye is added into an ethanol aqueous solution of which the percent concentration by mass is 5%-30%, and the pH value of an obtained mixture I is regulated to be 7.5-8.5 by a 0.1 M NaOH solution, wherein one end of the molecular structure of the cationic dye is cation, while the other end of the molecular structure is of a benzene ring structure; the powder of sodium alginate is added into an obtained mixture II, and after the powder of the sodium alginate is sufficiently dissolved, a 0.1 M hydrochloric acid solution is slowly dropwise added into an obtained mixture III to regulate the pH value of a mixed solution to be 3 to 5, wherein in the mixed solution, the mass fraction of the sodium alginate is 1%-12%; after the mixed solution is subjected to vacuum defoamation, the colored sodium alginate nano fibrous membrane can be prepared and obtained according to a conventional electrostatic spinning process. The method for preparing the colored sodium alginate nano fibrous membrane by the electrostatic spinning process has characteristics of short technical process, simple technical control, high production efficiency, good product quality, stable coloring performance and the like; a product is suitably used as a raw material for a filter material, a traumatic dressing, a tissue engineering material and the like.

Description

technical field [0001] The invention relates to a method for preparing a colored sodium alginate nanofiber membrane, in particular to a method for preparing a colored sodium alginate nanofiber membrane by an electrospinning process. Background technique [0002] Sodium alginate nanofibrous membrane is a new type of material prepared by electrospinning with the advantages of interconnection and super large surface area. It can be widely used in biomedical fields such as tissue engineering and wound dressing. [0003] Because the molecular chain segment of sodium alginate (especially the G segment) has strong rigidity and more negative charges, its molecular chain is relatively stretched; and, because of the strong hydrogen bond between sodium alginate and water, generally cannot Effective chain entanglement is formed, resulting in insufficient jet stabilization during electrospinning, poor spinnability, and inability to perform stable electrospinning. [0004] In the prior a...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/42D01F9/04D01F1/06
CPCD01F1/06D01F9/04D04H1/42D04H1/728
Inventor 谭业强隋坤艳马运良郝龙云夏延致吴淑贤王倩
Owner QINGDAO UNIV