Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of improving antibacterial performance of nanosilver

A nano-silver antibacterial and nano-silver technology, applied in the field of antibacterial materials, can solve complex problems and achieve the effects of easy acquisition, strong microbial toxicity, and improved antibacterial performance

Active Publication Date: 2018-11-30
HUNAN UNIV
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are relatively complicated, and they all improve the physical and chemical properties of nano-silver itself, and for nano-silver that already exists in the water environment or enters the body of plants, animals, microorganisms and humans as a drug carrier, the above-mentioned methods are not effective. Not applicable

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of improving antibacterial performance of nanosilver
  • Method of improving antibacterial performance of nanosilver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for improving the antibacterial properties of nano silver, comprising the following steps:

[0028] (1) Preparation of nano-silver: 1.5mL of trisodium citrate solution with a concentration of 24mmol / L and 4.5mL of sodium borohydride solution with a concentration of 24mmol / L were added to 53.5mL of ultrapure water. Stir vigorously, and at the same time add 0.5 mL of silver nitrate solution with a concentration of 24 mM while stirring, and the mixed solution turns yellow, indicating that nano-silver is generated. Then continue to stir at room temperature for 3 h, and the stirred nano-silver solution is purified through a 1KDa dialysis membrane to remove soluble impurities, such as trisodium citrate and silver ions, to obtain a nano-silver stock solution.

[0029] (2) Preparation of Phanerochaete chrysosporium bacteria balls: Phanerochaete chrysosporium spores were added to sterile water to form a Phanerochaete chrysosporium spore suspension, and 3.5 mL of the spo...

Embodiment 2

[0042] A method for improving the antibacterial properties of nano silver, comprising the following steps:

[0043] (1) Mix the monovalent electrolyte with the nano-silver stock solution prepared in Example 1 to obtain mixed solutions with different nano-silver concentrations.

[0044] Among them, the monovalent electrolyte is NaNO 3 When the nano-silver concentration is 0μM, 10μM, 60μM, 100μM, the corresponding mixed solutions are B1, B2, B3, B4, and the NaNO 3 The concentration is 30mM.

[0045] The monovalent electrolyte is KNO 3 When the nano-silver concentration is 0μM, 10μM, 60μM, 100μM, the corresponding mixed solutions are B5, B6, B7, B8, and the KNO 3 The concentration is 30mM.

[0046] (2) get 8 parts of Phanerochaete chrysosporium bacterial balls prepared in Example 1, join respectively in the mixed solution B1~B8 that makes in the step (1), wherein the Phanerochaete chrysosporium bacterial ball The addition amount is 0.9g / L (that is, the ratio of Phanerochaete...

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method of improving antibacterial performance of nanosilver. The method improves the antibacterial performance of nanosilver in a water environment by adopting a monovalent electrolyte. The monovalent electrolyte is an electrolyte containing monovalent cations. By means of synergistic interaction on microbial toxic action of nanosilver by adopting the monovalent cations,the antibacterial performance of nanosilver can be improved effectively. The method has the advantages of simple and feasible operation, low cost, high practicality, wide application range and the like. A used reagent is environment-friendly and is easy to obtain. The antibacterial performance of nanosilver in plants, animals, microorganisms and human bodies can be improved, the nanosilver is goodin antibacterial effect and the method has very good application value and application prospect.

Description

technical field [0001] The invention belongs to the technical field of antibacterial materials, and relates to a method for improving the antibacterial performance of nano silver. Background technique [0002] As a broad-spectrum antibacterial agent, Ag Nanoparticles (AgNPs) has the characteristics of low toxicity and is not easy to make microorganisms resistant to drugs. It is widely used in production and life, including coatings, textiles, medical supplies, personal Nursing supplies, food storage containers, tableware, and more. However, nano-silver has a large specific surface area and high specific surface energy, and is a thermodynamically unstable system. It is easy to complex, agglomerate and dissolve during the production and use of nano-silver, which in turn affects its antibacterial properties. Especially in the water environment, nano-silver will be converted into various forms of silver, such as Ag 0 Nanoparticles, soluble Ag + , Nanosilver / Soluble Ag + Comp...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00A01N59/16A01N59/00A01P3/00A01P1/00C12Q1/18C12R1/645
CPCA01N59/00A01N59/16C12Q1/18B82Y40/00B22F9/24G01N2333/37B22F1/0545
Inventor 黄真真曾茁桐曾光明陈安伟肖嵘何凯宋忠贤袁雷李慧
Owner HUNAN UNIV