Synthesis of metal nanoparticles using modified MPEG polymer

Patent metadata

Field	Value
Publication number	US-9873153-B1
Application number	US-201715465230-A
Country	US
Kind code	B1
Filing date	Mar 21, 2017
Priority date	Mar 21, 2017
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

The synthesis of metal nanoparticles using a modified mPEG (methoxypolyethylene glycol) polymer includes the steps of: preparing a methanolic solution of a polymer; providing an aqueous solution including a metal salt; and combining the methanolic solution of the polymer with the aqueous metal salt solution to produce the metal nanoparticles, where the metal salt is AgNO 3 , CuCl 2 , NiCl 2 , CoCl 2 , Pd(Ac) 2 , or HAuCl 4 and wherein the metal nanoparticles are silver, copper, cobalt, palladium, nicker or gold nanoparticles having a size between 1 nm and 100 nm in diameter.

First claim

We claim:

1. A method for synthesis of metal nanoparticles using a modified methoxypolyethylene glycol (mPEG) polymer, comprising the steps of:
preparing a methanolic solution of the polymer, wherein the modified mPEG polymer has the formula:

where n is an integer greater than 0, and where X and Y independently represent halogen, hydrazine, morpholine, piperidine or diethylamine;
providing an aqueous solution including a metal salt; and
combining the methanolic solution of the polymer with the aqueous metal salt solution to produce the metal nanoparticles.

2. The method for synthesis of metal nanoparticles according to claim 1 , wherein the methanolic solution of the polymer and the aqueous metal salt solution are mixed under stirring at room temperature.

3. The method for synthesis of metal nanoparticles according to claim 1 , wherein the metal salt is selected from the group consisting of AgNO 3 , CuCl 2 , NiCl 2 , CoCl 2 , Pd (Ac) 2 and HAuCl 4 .

4. The method for synthesis of metal nanoparticles using a polymer according to claim 3 , wherein the aqueous metal salt solution has a concentration between 1 mM/ml and 10 mM/ml.

5. The method for synthesis of metal nanoparticles according to claim 3 , wherein the metal nanoparticles are between 1 nm and 100 nm in diameter.

6. The method for synthesis of metal nanoparticles according to claim 3 , wherein the metal nanoparticles are between 1 nm and 25 nm in diameter.

7. The method for synthesis of metal nanoparticles according to claim 3 , wherein the metal salt is silver nitrate (AgNO 3 ) and the metal nanoparticles are silver nanoparticles.

8. The method for synthesis of metal nanoparticles according to claim 3 , wherein the metal salt is chloroauric acid (HAuCl 4 ) and the metal nanoparticles are gold nanoparticles.

9. The method for synthesis of metal nanoparticles according to claim 3 , wherein the metal salt is copper chloride (CuCl 2 ) and the metal nanoparticles are copper nanoparticles.

10. The method for synthesis of metal nanoparticles according to claim 3 , wherein the metal salt is palladium acetate [Pd(Ac)2] and the metal nanoparticles are palladium nanoparticles.

Assignees

• Univ King Saud

Inventors

• El-Faham Ayman Sadek Ahmed
• Al Othman Zeid Abdullah Mohammed
• Osman Sameh Mohamed Mahmoud

Classifications

• B22F1/054 Primary

  Nanosized particles · CPC title

• B22F2009/245

  Reduction reaction in an Ionic Liquid [IL] · CPC title

• B22F1/0018

  Operations & Transport · mapped topic

• B22F9/24 Primary

  starting from liquid metal compounds, e.g. solutions · CPC title

• B22F2304/054

  Particle size between 1 and 100 nm · CPC title