SOLID STATE SYNTHESIS METHOD OF SILVER NANOPARTICLES, AND SILVER NANOPARTICLES SYNTHESIZED THEREBY

• US 20120225126A1
• Filed: 11/09/2010
• Published: 09/06/2012
• Est. Priority Date: 11/11/2009
• Status: Abandoned Application

• Current Assignee: Gwangju Institute of Science and Technology
• Original Assignee: Gwangju Institute of Science and Technology
• Inventors: Kim, Sung Ho, Geckeler, Kurt E., Debnath, Dipen, Kim, Chorong
• Application Number:
  US13/509,463
• Publication Number:
  US 20120225126A1
• Time in Patent Office: Days
• US Class Current: 424/491
• CPC Class Codes: B22F 1/054 Nanosized particles
• CPC Class Codes: B22F 2301/255 Silver or gold
• CPC Class Codes: B22F 2304/054 Particle size between 1 and 100 nm
• CPC Class Codes: B22F 9/20 starting from solid metal compounds
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites

Abstract

Disclosed are a solid state synthesis method of silver nanoparticles, and silver nanoparticles synthesized thereby. The method includes mixing a silver salt and a water soluble polymer acting as both a reducing agent and a protecting agent to produce a solid mixture, and milling the solid mixture by a high-speed vibration milling process to form silver nanoparticles within the water soluble polymer. According to the present invention, silver nanoparticles can be easily and simply produced in a solid state through high speed vibration milling, thereby reducing costs for industrial production and transportation of silver nanoparticles. In addition, the synthesized silver nanoparticles can be used for a long time since the silver nanoparticles are stable in a solid state for 1 year or more.

Claims

1. A solid state synthesis method of silver nanoparticles, comprising:

mixing a silver salt and a water soluble polymer acting as both a reducing agent and a protecting agent to produce a solid mixture; and

milling the solid mixture by a high-speed vibration milling process to form silver nanoparticles within the water soluble polymer.

2. The solid state synthesis method according to claim 1, wherein the silver salt is one selected from the group consisting of silver nitrate (AgNO₃), silver nitrite (AgNO₂), silver acetate (CH₃COOAg), silver lactate (CH₃CH(OH)COOAg), silver citrate hydrate (AgO₂CCH₂C(OH)(CO₂Ag)CH₂CO₂Ag.xH₂O), and mixtures thereof.

3. The solid state synthesis method according to claim 1, wherein the water soluble polymer comprises oxygen or nitrogen having lone pair electrons.

4. The solid state synthesis method according to claim 3, wherein the water soluble polymer comprising the oxygen or nitrogen having lone pair electrons is one selected from the group consisting of starch, amylopectin, amylose, cellulose, cellulose acetate, nitrocellulose, ethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, chitin, chitosan, glycogen, poly(acrylic acid), poly(L-alanine), poly(ethylene glycol), polyglycine, poly(glycolic acid), poly(2-hydroxyethyl methacrylate),

5. Silver nanoparticles prepared by the solid state synthesis method according to claim 1.

6. Silver nanoparticles prepared by the solid state synthesis method according to claim 2.

7. Silver nanoparticles prepared by the solid state synthesis method according to claim 3.

8. Silver nanoparticles prepared by the solid state synthesis method according to claim 4.

9. The silver nanoparticles according to claim 5, wherein the silver nanoparticles have an average particle diameter ranging from 2 to 50 nm.

10. The silver nanoparticles according to claim 6, wherein the silver nanoparticles have an average particle diameter ranging from 2 to 50 nm.

11. The silver nanoparticles according to claim 7, wherein the silver nanoparticles have an average particle diameter ranging from 2 to 50 nm.

12. The silver nanoparticles according to claim 8, wherein the silver nanoparticles have an average particle diameter ranging from 2 to 50 nm.