Preparation method of all-silicon molecular sieve encapsulated nano-silver bactericide

A technology of all-silicon molecular sieve and nano-silver, applied in botany equipment and methods, biocides, disinfectants, etc., can solve the problems of fast release rate of Ag bactericide, uneven distribution of Ag, affecting bactericidal performance, etc., to avoid aggregation , avoid violent release phenomenon, broad application prospects

Active Publication Date: 2022-01-04
SUN YAT SEN UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can all synthesize molecular sieve-encapsulated nano-silver fungicides, during the loading process, a part of the metal precursor is inevitably adsorbed on the outer surface or skeleton of the carrier, resulting in uneven distribution of Ag, which in turn leads to the release of Ag fungicides. If the rate is too fast, it will eventually affect the bactericidal performance

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
  • Preparation method of all-silicon molecular sieve encapsulated nano-silver bactericide
  • Preparation method of all-silicon molecular sieve encapsulated nano-silver bactericide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A kind of preparation method of all-silicon molecular sieve encapsulation nano-silver fungicide (using Silicalite-1 molecular sieve as molecular sieve carrier)

[0028] (1) Get 7.32g tetrapropyl ammonium hydroxide aqueous solution (TPAOH, 40wt%), add 5g H 2 Dilute with O, then add 0.507mL (3-mercaptopropyl) trimethoxysilane, mix well to make a mixed solution; take 0.022g silver nitrate (AgNO 3 ), plus 7.887gH 2 O was dissolved into an aqueous silver nitrate solution, and the obtained aqueous silver nitrate solution was added dropwise to the above mixed solution, and the stirring was continued for 30 minutes.

[0029] (2) Add 10g of tetraethyl silicate (TEOS) dropwise to the above mixing system, mix evenly to obtain a colorless and transparent silver-silica sol, heat the obtained silver-silica sol to 80°C, stir and age for 1h, and obtain silver -Silicone gel.

[0030] (3) Put the above silver-silica gel into a polytetrafluoroethylene-lined crystallization...

Embodiment 2

[0032] Embodiment 2 A kind of preparation method of all-silicon molecular sieve encapsulated nano-silver fungicide

[0033] (1) Get 7.32g tetrapropyl ammonium hydroxide aqueous solution (TPAOH, 40wt%), add 5g H 2 O to dilute, then add 0.622mL (3-mercaptopropyl) trimethoxysilane, mix well to make a mixed solution; take 0.027g silver nitrate (AgNO 3 ), add 7.887g H 2 O was dissolved into an aqueous silver nitrate solution, and the obtained aqueous silver nitrate solution was added dropwise to the above mixed solution, and the stirring was continued for 30 minutes.

[0034] (2) Add 10g of tetraethyl silicate (TEOS) dropwise to the above mixing system, mix evenly to obtain a colorless and transparent silver-silica sol, heat the obtained silver-silica sol to 80°C, stir and age for 1h, and obtain silver -Silicone gel.

[0035] (3) Put the above silver-silica gel into a polytetrafluoroethylene-lined crystallization kettle for static crystallization at 95°C for 4 days, centrifuge, ...

Embodiment 3

[0037] Embodiment 3 A kind of preparation method of all-silicon molecular sieve encapsulated nano-silver fungicide

[0038](1) Get 7.32g tetrapropyl ammonium hydroxide aqueous solution (TPAOH, 40wt%), add 5g H 2 O to dilute, then add 0.761mL (3-mercaptopropyl) trimethoxysilane, mix well to make a mixed solution; take 0.033g silver nitrate (AgNO 3 ), add 7.887g H 2 O was dissolved into an aqueous silver nitrate solution, and the obtained aqueous silver nitrate solution was added dropwise to the above mixed solution, and the stirring was continued for 30 minutes.

[0039] (2) Add 10g of tetraethyl silicate (TEOS) dropwise to the above mixing system, mix evenly to obtain a colorless and transparent silver-silica sol, heat the obtained silver-silica sol to 80°C, stir and age for 1h, and obtain silver -Silicone gel.

[0040] (3) Put the above silver-silica gel into a polytetrafluoroethylene-lined crystallization kettle for static crystallization at 95°C for 4 days, centrifuge, w...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of bactericide preparation, and particularly relates to a preparation method of an all-silicon molecular sieve encapsulated nano-silver bactericide, the preparation method comprises the following steps: introducing a nano-silver precursor complex formed by (3-mercaptopropyl) trimethoxysilane and silver nitrate into a synthesis system of an all-silicon molecular sieve, encapsulating the nano-silver precursor into the all-silicon molecular sieve through in-situ static crystallization; and finally, preparing the all-silicon molecular sieve encapsulated nano-silver bactericide through high-temperature roasting and hydrogen reduction. On one hand, silver ions are prevented from being precipitated under the coordination action of (3-mercaptopropyl) trimethoxysilane and the silver ions, and the silver ions are uniformly dispersed in pore channels of the molecular sieve under the interaction of (3-mercaptopropyl) trimethoxysilane and the molecular sieve precursor. On the other hand, the release rate of the silver ions can be effectively limited by the limited aperture of the molecular sieve, the sudden release phenomenon is avoided, the purpose of slow release control is achieved, and the bactericide has a wide application prospect as a broad-spectrum bactericide.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-silver bactericide, and in particular relates to a method for preparing a nano-silver bactericide encapsulated by an all-silicon molecular sieve. Background technique [0002] Silver ions have a strong bactericidal effect. Studies have shown that in water or air containing water, the surface of nano-silver will be oxidized and free traces of silver ions, and when the concentration of silver ions reaches 0.01ppm, it will have a good bactericidal effect After the bacteria die, silver ions can be released again to continue to play a bactericidal function. Therefore, nano-silver is a high-quality and long-lasting bactericide. However, if nano-silver is used directly for sterilization, there are problems such as high price, easy aggregation, and unstable release. For many years, scientists have been trying to uniformly load nano-silver in various carriers to obtain better bactericidal effec...

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): A01N59/16A01N25/08A01N25/26A01P1/00
CPCA01N59/16A01N25/08A01N25/26Y02A50/30
Inventor 陈强李彦之杨淦钧谭旗清谭耀棕李婷婷
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products