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Method for preparing polyvinyl alcohol nano fibrous membrane containing nano silver and amino acid

A nanofiber membrane, polyvinyl alcohol technology, used in textiles, papermaking, non-woven fabrics, etc., can solve the problems of unstable silver nitrate solution, unstable silver nitrate, graying, etc., to promote wound healing, accelerate healing, easy-to-control effects

Inactive Publication Date: 2015-02-25
JILIN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual operation, silver nitrate is unstable in the presence of high-molecular organic matter, and it turns gray or gray-black when exposed to light.
The silver nitrate solution is mixed with amino acid to form a silver-amino acid complex, which overcomes the instability of silver nitrate solution to a certain extent

Method used

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  • Method for preparing polyvinyl alcohol nano fibrous membrane containing nano silver and amino acid
  • Method for preparing polyvinyl alcohol nano fibrous membrane containing nano silver and amino acid
  • Method for preparing polyvinyl alcohol nano fibrous membrane containing nano silver and amino acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Take 5ml of anhydrous formic acid and 16ml of deionized water to prepare an aqueous formic acid solution with a volume ratio of 1:3.2, dissolve 2.86g of polyvinyl alcohol with the solution, and prepare formic acid and polyvinyl alcohol with a mass percentage concentration of 12% of polyvinyl alcohol. solution, fully stirred for 2-3 hours to dissolve evenly, and packed into the liquid filling pipe A of the double-fluid parallel-axis electrospinning device 1 (such as figure 1 shown);

[0030] 2. Weigh 0.47g of silver nitrate, and dissolve it in 10ml of saturated L-histidine solution (4.3g / 100ml, 25°C) under dark conditions, that is, the amount of silver nitrate and L-histidine The ratio is 1:1, react at room temperature for 1 hour, and then put this solution into the liquid filling tube B of the double-fluid parallel-axis electrospinning device 1 (such as figure 1 shown);

[0031] 3. The solution in the liquid filling pipe A and the solution in the liquid filling pip...

Embodiment 2

[0036] By the way of Example 1, the difference is that the polyvinyl alcohol of 3.42g is added in step 1, and the mass percent concentration of the prepared polyvinyl alcohol solution is 14%; the silver nitrate quality 1.16g added in step 2 is dissolved in 5ml In the L-lysine saturated solution (40g / 100ml, 35 ℃), the ratio of the amount of silver nitrate and L-lysine is 0.5:1; Use mass percentage concentration in step 5 and be 40% formaldehyde and 36 % Concentrated acetic acid was used to carry out cross-linking reaction on the prepared nanofibrous membrane under the condition of gas phase, and the cross-linking time was 2 hours. Other processing conditions are all with embodiment 1.

[0037] The prepared nano-silver particles are attached to the surface of nanofibers of L-lysine polyvinyl alcohol, the average diameter of nano-silver particles is 22nm, the average diameter of nanofibers is 208nm, and the average diameter of fibers after crosslinking is 610nm.

Embodiment 3

[0039] According to the method of Example 1, the difference is that in step 1, 4ml of anhydrous formic acid and 16ml of deionized water are added, that is, the volume ratio is 1:4 to dissolve 3.53g polyvinyl alcohol, and the mass concentration of the prepared polyvinyl alcohol solution is 15%, the quality of silver nitrate added in step 2 is 0.92g dissolved in 8ml of L-arginine saturated solution (14.8g / 100ml, 25 ℃), the amount of silver nitrate and L-arginine The ratio is 0.8:1, and other process conditions are the same as in Example 1.

[0040] Prepared nano silver particles attached to the surface of nanofibers of L-arginine polyvinyl alcohol, the average diameter of nano silver particles is 20nm, the average diameter of nanofibers is 210nm, and the average diameter of fibers after crosslinking is 625nm.

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Abstract

The invention relates to a method for preparing a polyvinyl alcohol nano fibrous membrane containing nano silver and amino acid, which comprises the following steps: dissolving polyvinyl alcohol in a mixed solution of formic acid and deionized water, adding into a two-fluid beaming electrostatic spinning pouring pipe A, adding a complex solution generated from amino acid and silver ion into a two-fluid beaming electrostatic spinning pouring pipe B, gathering the two solutions in a sprayer C under the action of gravity, connecting a high-voltage generator to carry out electrostatic spinning while controlling the voltage at 15-20 KV, and receiving fibers with a metal flat plate; and crosslinking the received fibers in formaldehyde and concentrated acetic acid gas phase, and meanwhile, reducing the silver ion in silver histidine to obtain the nano silver, wherein the obtained nano fiber is hydrophilic, but can be easily dissolved in water. The preparation method provided by the invention is simple and high in yield; and the nano fibrous membrane has the advantages of high stability, high mechanical properties and favorable antimicrobial property, and can be used in the fields of medical treatment, cosmetics, food and the like.

Description

technical field [0001] The invention relates to a method for preparing nano-silver and amino acid polyvinyl alcohol nanofiber membranes, in particular to a method for preparing nano-silver and amino acid polyvinyl alcohol nanofiber membranes using a dual-fluid parallel-axis electrospinning device. Background technique [0002] Nano-silver is an inorganic antibacterial material. Judging from the current research and development of nano-silver, it has the advantages of high safety, good heat resistance, wide antibacterial range, and long effective period of continuous sterilization. It is precisely because of the above-mentioned characteristics of nano-silver antibacterial materials and the quantum effect, small size effect and large specific surface area characteristics of nano-materials that attract many researchers to spin nano-silver into fiber membranes by electrospinning to achieve antibacterial. effect. [0003] Amino acids are the basic substances that make up protein...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D04H1/4309
Inventor 程志强康立娟朱广千刘伟赵利
Owner JILIN AGRICULTURAL UNIV
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