Method for preparing silver-loaded chitosan medical dressing

A technology of chitosan and silver nitrate, which is applied in medical science, absorbent pads, textiles and papermaking, etc., can solve the problems of chemical reducing agents affecting application, low efficiency and high production cost, and achieve excellent broad-spectrum antibacterial properties and simple treatment methods , fixed effect

Inactive Publication Date: 2017-05-31
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of existing silver-loaded chitosan medical dressings uses inorganic and organic reducing agent chemical products to chemically reduce nano-silver, which has high production costs, low efficiency, and the residue of chemical reducing agents is harmful to the human body, which affects its application in the medical and health field. application problem

Method used

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  • Method for preparing silver-loaded chitosan medical dressing
  • Method for preparing silver-loaded chitosan medical dressing
  • Method for preparing silver-loaded chitosan medical dressing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Utilize loquat leaf to prepare nano-silver aqueous solution, comprises the following steps:

[0028] (1) Take by weighing 5g of dried and pulverized loquat leaf powder in a 250mL Erlenmeyer flask, add 150mL of deionized water and mix uniformly, leaching for 90min at a temperature of 80°C, then filter and centrifuge to remove the loquat leaf powder residue, Obtain loquat leaf extract;

[0029] (2) Add 2 mL of loquat leaf extract to 50 mL of 1 mmol / L silver nitrate solution, mix well, adjust the pH value to 6, and react at 80° C. for 60 min to obtain a nano-silver aqueous solution.

[0030] The ultraviolet-visible absorption spectrum of the nano-silver that the present embodiment makes is as attached figure 1 shown by figure 1 It can be seen that a typical nano-silver absorption peak has occurred at 435nm, which proves that nano-silver particles have been generated in the aqueous solution; figure 2 as shown, figure 2 It shows that the nano-silver prepared from loqua...

Embodiment 2

[0036] Utilize loquat nucleus to prepare nano-silver, comprises the following steps:

[0037] (1) Take by weighing 5g of dried and pulverized loquat core powder in a 250ml Erlenmeyer flask, add 100mL of deionized water therein, mix well and then leaching for 90min at a temperature of 90°C, then filter and centrifuge to remove the loquat core powder residue, Obtain loquat core extract.

[0038] (2) Add 5 mL of loquat core extract to 50 mL of 1 mmol / L silver nitrate solution, mix well, adjust the pH value to 8-9, and then place it at 60° C. for 60 min to obtain a nano silver aqueous solution.

[0039] Utilize the nano-silver aqueous solution prepared by the present embodiment to prepare silver-loaded chitosan medical dressing, comprising the following steps:

[0040] (1) First use 0.1mol / L acetic acid solution to pre-adjust the pH value of the nano-silver aqueous solution prepared in this example to 5.6, then immerse 1g of chitosan fiber non-woven fabric in it according to the ba...

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Abstract

The invention relates to a method for preparing silver-loaded chitosan medical dressing by utilizing loquat leaves or loquat kernel extract. The method comprises the following steps: extracting effective ingredients of the loquat leaves or loquat kernels by using a leaching method to obtain extract of the loquat leaves or loquat kernels; reducing silver nitrate with the extract to prepare a nano-silver aqueous solution; and finally immersing a chitosan fiber non-woven fabric with the nano-silver aqueous solution to obtain the silver-loaded chitosan medical dressing with excellent antibacterial effect. The method has the characteristics of simple process, ecological friendliness, quick action, high efficiency, safety, no toxicity and the like; the silver-loaded chitosan medical dressing prepared by treating the chitosan fiber non-woven fabric with nano-silver has excellent broad-spectrum antibacterial property and durable antibiotic efficiency, and has an antibacterial rate over 98 percent even being washed for multiple times.

Description

technical field [0001] The invention belongs to the technical field of textile finishing, and in particular relates to a method for preparing a silver-loaded chitosan medical dressing by using loquat leaf or loquat core extract. Background technique [0002] As a medical sanitary material used to cover sores, wounds or other damaged parts, medical dressings can replace damaged skin to isolate the wound from the external bacterial environment during the wound healing process to protect the wound and reduce infection. , At the same time, it can effectively absorb wound secretions, and maintain a certain temperature and humidity to provide a suitable environment for wound healing and promote wound healing. Today, with the aging population and the increase of chronic ulcer wounds, the demand for medical dressings in my country is increasing, and the requirements for medical dressings are also getting higher and higher. At present, medical dressings are developing in the directi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/40A61L15/18A61L15/46A61L15/28D06M11/83
CPCA61L15/40A61L15/18A61L15/28A61L15/46D06M11/83C08L5/08
Inventor 唐人成马振朕关晋平
Owner SUZHOU UNIV
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