Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of reproducible SiO2/PAM core-shell composite nano antibacterial particles

A nano-antibacterial particle and core-shell technology, which is applied in the field of antibacterial particle preparation, can solve the problems of poor washing resistance and low bonding fastness, and achieve the effects of low production cost, excellent antibacterial effect and function, and convenient preparation

Active Publication Date: 2015-12-16
ZHEJIANG SCI-TECH UNIV
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims to solve the current problems that haloamine compounds cannot be immobilized on the surface of various substrates, the bonding fastness is not high, and the water washing resistance is poor. The treatment method of the invention can make efficient and stable haloamine polymers and inorganic Nanomaterials are organically combined to make full use of the high specific surface area of ​​nanomaterials to greatly improve the antibacterial performance and use efficiency of simple haloamine materials

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 reproducible SiO2/PAM core-shell composite nano antibacterial particles
  • Preparation method of reproducible SiO2/PAM core-shell composite nano antibacterial particles
  • Preparation method of reproducible SiO2/PAM core-shell composite nano antibacterial particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The renewable SiO of the embodiment of the present invention 2 The preparation method of / PAM core-shell composite nanometer antibacterial particles is carried out according to the following specific steps:

[0046] Step 1, using tetraethyl orthosilicate (TEOS) as a precursor, in a mixed solution of alcohol, water and ammonia, to prepare nano-SiO by hydrolysis, dehydration and polymerization 2 particle. First, 50 parts of TEOS are added to 100 parts of ethanol with a mass fraction of 94wt% to prepare a mixed solution; secondly, the prepared mixed solution is mixed with 35 parts of deionized water, 100 parts of ethanol with a mass fraction of 94wt% and a mass fraction of 28wt% NH 4 OH solution was mixed, adding 4 parts of NH 4 OH NH 4 OH solution to adjust SiO 2 particle size, and then further reacted in a constant temperature magnetic stirrer at a temperature of 30°C for 24h to make SiO 2 The particle size distribution is between 250-300nm;

[0047] Nano-SiO was t...

Embodiment 2

[0058] Follow the same method steps as in Example 1, except that in this example, in step 1, 5 parts of NH 4 OH NH 4 OH solution to adjust SiO 2 particle size, and then further reacted in a constant temperature magnetic stirrer at a temperature of 30°C for 24h to make SiO 2 The particle size distribution is between 170 and 200nm; Step 2 is the same as Step 2 of Example 1; in Step 3, after adding cation and anion PAM, the time to continue stirring is 4h; Step 4 is the same as Step 4 of Example 1; Core-shell SiO with a diameter of 335.0nm 2 / Halamine nanocomposite antibacterial particles.

Embodiment 3

[0060] Steps 1 to 2 of this example are the same as Steps 1 to 2 of Example 1, except that in Step 3, 0.3 g of cationic PAM is added, and stirred for 4 hours in a constant temperature mixer at a temperature of 20° C. fully dissolved; then add 0.3g of anionic PAM, and continue to stir for 4h in a constant temperature mixer at a temperature of 20°C; Step 4 is the same as Step 4 in Example 1 to obtain SiO with a particle size of 435.4nm and a core-shell structure. 2 / Halamine nanocomposite antibacterial particles.

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 preparation method of reproducible SiO2 / PAM core-shell composite nano antibacterial particles. The preparation method comprises the following steps: by regulating and controlling a dispersed state of nano SiO2, and carrying out charged treatment, assembling cation PAM and anion PAM on the surface of the nano SiO2 respectively in sequence; taking TEOS as a precursor, and carrying out hydrolysis, dehydration and condensation polymerization to prepare nano SiO2 particles; adjusting the pH value of a solution; grafting CPAM and APAM on the surface of the nano SiO2 through static self-assembling in sequence; washing with alcohol and drying in vacuum; and finally, treating the mixture in a sodium hypochlorite solution, and washing with alcohol and drying in vacuum to obtain a SiO2 / halamine nano composite antibacterial material. A synthesis process disclosed by the invention has a simple preparation route; the preparation is convenient, reaction conditions are moderate and the production cost is low, so that the process is easy to popularize and apply; and the synthesized antibacterial composite nano particles have a novel structure and reproducible antibacterial efficient spectrum and antibacterial function, and have wide application.

Description

technical field [0001] The invention relates to a method for preparing antibacterial particles, in particular to a renewable SiO 2 The invention discloses a method for preparing PAM core-shell composite nano antibacterial particles, which belongs to the technical field of preparation and application of inorganic-organic composite antibacterial materials. Background technique [0002] Antibacterial materials refer to a new class of functional materials that can kill and inhibit the growth and reproduction of microorganisms and their activity. Nano antibacterial materials have become a research hotspot due to their large specific surface area and high reactivity. Commonly used antibacterial agents include inorganic metals and their oxides, organic metals, quaternary ammonium salts, quaternary phosphonium salts, biguanides, chitosan and its derivatives, etc., but there are certain defects and deficiencies that limit its application. For example, heavy metal antibacterial agen...

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): A01N37/28A01N25/08A01P1/00B82Y30/00B82Y40/00
Inventor 丁新波仇巧华刘涛徐国平
Owner ZHEJIANG SCI-TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com