Preparation method of silver-loaded mesoporous silicon dioxide antibacterial agent

A technology of silica and antibacterial agents, which is applied in the field of preparation of inorganic antibacterial agents, can solve the problems of limited sources, poor stability and heat resistance, poor chemical stability and thermal stability, etc., and achieve simple preparation methods and long-lasting antibacterial effects , Stable effect of antibacterial performance

Inactive Publication Date: 2014-05-21
ZHEJIANG SCI-TECH UNIV
View PDF7 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural antibacterial agents refer to extracting parts of animals and plants with antibacterial functions, but they have poor stability and heat resistance, short duration of drug effects, limited sources, and cannot be produced on a large scale
Organic antibacterial agents are generally

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Mix polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer and water uniformly according to the mass percentage of 0.01:1, stir until clear, then add tetraethyl orthosilicate and silver nitrate, of which orthosilicic acid The mass percent of ethyl ester and polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer is 0.1:1, and the mass percent of silver nitrate and polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer is 0.05:1, stirred at 200 rpm for 12 hours, then heated to 50°C, and continued to stir for 6 hours to obtain silver sol;

[0018] (2) Stir the silver sol solution at 200 rpm for 6 hours, and add dropwise an aqueous solution of sodium chloride with a mass percent concentration of 0.1% during the stirring process until the molar ratio of silver ions and chloride ions in the sol solution is 1:1, to obtain silica / silver chloride gel;

[0019] (3) After the silica / silver chloride gel was vacu...

Embodiment 2

[0022] (1) Mix sodium dodecylbenzenesulfonate and water evenly according to the mass percentage of 0.1:1, stir until clear, then add propyl orthosilicate and silver nitrate, wherein propyl orthosilicate and dodecylbenzene The mass percentage of sodium sulfonate is 0.5:1, the mass percentage of silver nitrate and sodium dodecylbenzene sulfonate is 0.1:1, stir at 400 rpm for 6 hours, then heat to 80°C, and continue stirring for 2 hours , to obtain silver sol solution;

[0023] (2) Stir the silver sol solution at 400 rpm for 2 hours, and add dropwise an aqueous solution of potassium chloride with a mass percent concentration of 0.1% during the stirring process until the molar ratio of silver ions and chloride ions in the sol solution is 1:1, to obtain silica / silver chloride gel;

[0024] (3) After the silica / silver chloride gel was vacuum-dried, it was heat-treated at 600° C. for 2 hours to obtain a silver-loaded mesoporous silica antibacterial agent.

[0025] The specific surf...

Embodiment 3

[0027] (1) Mix hexadecyltrimethylammonium bromide and water uniformly according to the mass percentage of 0.02:1, stir until clear, then add butyl orthosilicate and silver nitrate, wherein butyl orthosilicate and hexadecane The mass percentage of trimethyl ammonium bromide is 0.3:1, the mass percentage of silver nitrate and hexadecyl trimethyl ammonium bromide is 0.06:1, stirred at 320 rpm for 8 hours, then heated to 65 ℃, continue to stir for 5 hours to obtain silver sol solution;

[0028] (2) Stir the silver sol solution at 380 rpm for 3 hours, and add dropwise an aqueous solution of zinc chloride with a mass percent concentration of 0.1% during the stirring process until the molar ratio of silver ions and chloride ions in the sol solution is 1:1, to obtain silica / silver chloride gel;

[0029] (3) After the silica / silver chloride gel was vacuum-dried, it was heat-treated at 500° C. for 5 hours to obtain a silver-loaded mesoporous silica antibacterial agent.

[0030] The sp...

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
Specific surface areaaaaaaaaaaa
Apertureaaaaaaaaaa
Pore volumeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a silver-loaded mesoporous silicon dioxide antibacterial agent. The preparation method disclosed by the invention comprises the following steps: dissolving a template agent, a silicon source and silver nitrate in water to obtain a silver sol solution, adding a chloride aqueous solution into the silver sol solution, stirring and mixing to form silicon dioxide/silver chloride gel, drying gel, and carrying out thermal treatment to obtain the mesoporous silicon dioxide antibacterial agent containing elemental silver. The prepared silver-loaded mesoporous silicon dioxide antibacterial agent is 200-1000 cm<2>/g in specific surface area, 5-30 nm in aperture and 1.0-5.0 cm<3>/g in pore volume; the mass percentage of elemental silver is 10-30%. The antibacterial agent prepared by the preparation method disclosed by the invention keeps the ordered porous structure, the uniform aperture, the larger specific surface area and the pore volume of the carrier material; the antibacterial agent prepared by the preparation method disclosed by the invention has the characteristics of being easy for controlling the content of antibacterial active bodies, simple in preparation method, broad-spectrum in antibacterial property, durable in antibacterial efficiency, steady in antibacterial property, nontoxic to human body and the like and can be widely applied in the fields of ceramics, plastics, textiles, coatings, water treatment and the like.

Description

technical field [0001] The invention relates to a preparation method of an inorganic antibacterial agent, in particular to a preparation method of a silver-loaded mesoporous silicon dioxide antibacterial agent. Background technique [0002] In modern life, there are a large number of viruses, bacteria, fungi and other microorganisms in the environment, which not only pollute the environment, but also directly lead to the occurrence and infection of many diseases, posing a great threat to human health. In recent years, due to the impact of "SARS", "bird flu" and "H1N1 influenza", people's awareness of hygiene has been continuously enhanced, and the demand for antibacterial materials and their products has greatly increased. [0003] Antibacterial agents used by people can be divided into three categories: natural antibacterial agents, inorganic antibacterial agents and organic antibacterial agents. Natural antibacterial agents refer to the parts of animals and plants that ha...

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
IPC IPC(8): A01N59/16A01N25/08A01P1/00A01P3/00
Inventor 朱海霖陈建勇张华鹏
Owner ZHEJIANG SCI-TECH 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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap