Method for preparing antibacterial nanometer silver colloid

A nano-silver sol, water-soluble technology, applied in the direction of botanical equipment and methods, chemicals for biological control, biocides, etc., can solve the problems of poor stability of nano-silver, achieve low cost, high yield, and application wide range of effects
CN101731272AActive Publication Date: 2010-06-16INST OF BASIC MEDICAL SCI ACAD OF MILITARY MEDICAL SCI OF PLA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF BASIC MEDICAL SCI ACAD OF MILITARY MEDICAL SCI OF PLA
Publication Date
2010-06-16

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Abstract

The invention discloses a method for preparing antibacterial nanometer silver colloid, belonging to the technical field of nanometer biological materials. The method uses a chemical reduction method, comprising the following steps: dissolving water-soluble protective agent in silver nitrate water solution with the concentration of 0.001-0.1mol / L, wherein the mass ratio of protective agent to silver nitrate is 0.5-10.0:1; carrying out ice bath on sodium borohydride water solution with the concentration of 0.001-0.2mol / L for 10-30min; and dropwise adding the silver nitrate water solution containing protective agent in the sodium borohydride water solution with the speed of 30-60 drop / min, stirring by a magnetic stirrer, stirring for 20-40min after dropwise adding to prepare the nanometer silver colloid with the grain size of 5-80nm, wherein the mol ratio of the sodium borohydride to the silver nitrate is 1.0-30.0:1. The nanometer silver colloid prepared by the invention has the advantages of high concentration, high stability, high dispensability, and obviously-enhanced antibacterial property.
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Description

technical field

[0001] The invention belongs to the technical field of biological nanomaterials, and in particular relates to a preparation method of antibacterial nano silver sol. Background of the invention

[0002] The antibacterial application of silver and silver compounds has a long history, but the antibacterial activity of silver colloids was not discovered until the early 20th century. The discovery of antibiotics once brought the development of this field to a standstill. However, with the increasing resistance of pathogenic microorganisms to antibiotics, people began to pay attention to the biological effects of silver colloids again. The antibacterial effect of nano-silver colloid on some strains can be comparable to that of antibiotics. At present, nano-silver has been successfully applied in experimental research such as wound repair and antibacterial fabrics. In addition, nano-silver is also widely used in the fields of environmental protection, textile and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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