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Preparation method of polysaccharide nano-silver colloidal solution

A colloidal solution and nano-silver technology, which is applied in the field of preparation of nano-silver colloidal solution, can solve the problems of poor human body biocompatibility of protective agent, limited application of nano-silver colloidal solution, poor acid-base tolerance, etc., and achieves low cost and antibacterial properties. High efficiency and good stability

Inactive Publication Date: 2013-02-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing technology for preparing nano-silver colloidal solution has the problems of uneven particle size and poor stability of the product
At the same time, for antibacterial textiles and medical and sanitary products, the protective agent has poor biocompatibility to the human body, high cost or poor tolerance to acid and alkali, which limits the application of nano-silver colloidal solutions in the above fields

Method used

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  • Preparation method of polysaccharide nano-silver colloidal solution
  • Preparation method of polysaccharide nano-silver colloidal solution
  • Preparation method of polysaccharide nano-silver colloidal solution

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1. Dissolve 0.20g of polydextrose in 100ml of deionized water to obtain a polydextrose aqueous solution with a concentration of 0.20% by weight; polydextrose is produced by thermal polymerization of glucose, sorbic acid or citric acid, mainly 1,6-glycosidic bonds, Its molecular weight is 1000-100000;

[0021] 2. Configure a silver nitrate solution of 7.87g / L, add dropwise an ammonia solution with a concentration of 10% by weight until the precipitation disappears, and obtain a silver ammonia solution with a mass fraction of 7.87g / L;

[0022] 3. Mix 0.20% polydextrose solution and silver ammonia solution with a mass fraction of 7.87g / L at a volume ratio of 4:1, stir at 70°C for 6 hours, and obtain a nano-silver colloid solution with a particle size of 5-60nm.

[0023] See attached figure 1 , which is the ultraviolet spectrogram of the nano-silver solution provided in this embodiment; as can be seen from the figure, the characteristic absorption peak of elemental silver ...

Embodiment 2

[0027] 1. Dissolve 0.15g of aminated polydextrose in 100ml of deionized water to obtain a 0.15% aqueous solution of aminated polydextrose;

[0028] 2. Configure 7.87g / L silver nitrate solution, add 10% ammonia solution dropwise until the precipitate disappears, and obtain a silver ammonia solution with a mass fraction of 7.87g / L;

[0029] 3. Mix 0.15% aminopolydextrose and silver ammonia solution with a mass fraction of 7.87g / L at a volume ratio of 4:1, stir at 70°C for 6 hours, and obtain a nano-silver colloid solution with a particle size of 5-50nm .

Embodiment 3

[0031] 1. Dissolve 0.17g of ketopolydextrose in 100ml of deionized water to obtain a 0.17% aqueous solution of ketopolydextrose;

[0032] 2. Configure 7.87g / L silver nitrate solution, add 10% ammonia solution dropwise until the precipitate disappears, and obtain a silver ammonia solution with a mass fraction of 7.87g / L;

[0033] 3. Mix 0.17% ketopolydextrose aqueous solution and silver ammonia solution with a mass fraction of 7.87g / L at a volume ratio of 4:1, stir at 70°C for 6 hours, and obtain nano silver with a particle size of 5-50nm colloidal solution.

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Abstract

The invention discloses a preparation method of a polysaccharide nano-silver colloidal solution. The preparation method comprises the steps of mixing a polydextrose solution with the mass percent of 0.001%-10% and a silver ammonia solution with the mass fraction of 0.01g / L-100g / L in a volume ratio of 1:(1000-1), and fully mixing the two solutions at 10-90 DEG C, thus obtaining the nano-silver colloidal solution with the average grain diameter of 1nm-100nm. According to the invention, the technical scheme is simple in process, polydextrose adopted by the method is high in safety for human beings, and the prepared nano-silver colloidal solution is good in stability, is small in grain size of nano-silver, has an excellent antibacterial effect, is good in affinity with cellulose fibers, can be used for disinfection of common object surfaces, skins and mucosa and preparation of silver-loaded antibacterial fibers or silver-contained viscose fibers as well as silver-contained antibacterial colloid, and the like.

Description

technical field [0001] The invention relates to a method for preparing a nano-silver colloid solution, which belongs to the field of nano-materials. Background technique [0002] Nano-silver is a kind of metal silver with a particle size of nanometer scale. Nano silver has high specific surface area, high surface activity, high conductivity, and is widely used in catalyst materials, antistatic materials and biosensor materials. At the same time, nano-silver has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Staphylococcus aureus, Escherichia coli, Chlamydia trachomatis, and will not produce drug resistance, so it is widely used in the field of medical antibacterial . Animal experiments have shown that even if the dosage of this nano-silver antibacterial micropowder reaches several thousand times the standard dose, the tested animals have no poisoning performance. [0003] Nano-silver preparation methods mainly in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 陈宇岳徐思峻林红
Owner SUZHOU UNIV
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