Colloid solution of metal nanoparticles, metal-polymer nanocompositions and method for preparation thereof

A metal nanoparticle, colloidal solution technology, applied in sol preparation, nanostructure manufacturing, nanotechnology and other directions, can solve the problems of unsafe working environment, environmental problems, high explosion risk, etc., and achieve good electrical conductivity, Good antibacterial activity, good stability effect

Inactive Publication Date: 2004-06-30
POSTECH ACAD IND FOUND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the excessive use of toluene as an oil medium is equivalent to about 5 times the amount of water, causing environmental problems
Furthermore, a safe working environment is not guaranteed due to the high risk of explosion during its preparation

Method used

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  • Colloid solution of metal nanoparticles, metal-polymer nanocompositions and method for preparation thereof
  • Colloid solution of metal nanoparticles, metal-polymer nanocompositions and method for preparation thereof
  • Colloid solution of metal nanoparticles, metal-polymer nanocompositions and method for preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: Colloidal solution of silver nanoparticles prepared by using (1-vinylpyrrolidone)-acrylic acid copolymer as stabilizer

[0057] Completely dissolve 1.863g AgNO in 592g water 3 , 395 g of isopropanol and 11.137 g of (1-vinylpyrrolidone)-acrylic acid copolymer having a weight ratio of 75:25 and a molecular weight (MW) of 96,000. The reactor containing the solution was purged with nitrogen for 1 hour and completely sealed, followed by irradiation with gamma rays at a dose of 30 KGy, thereby preparing a yellow colloidal solution of silver nanoparticles.

[0058] The particle diameter distribution and particle shape of the prepared silver nanoparticle colloidal solution were observed by using a transmission electron microscope (TEM). The results are shown in figure 1 .

[0059] Such as figure 1 As shown, the colloidal solution of silver nanoparticles has a very uniform particle diameter distribution and uniform particle shape. Most of the particles have an av...

Embodiment 2

[0061] Example 2: Preparation of Colloidal Solution of Silver Nanoparticles by Using Polyvinylpyrrolidone as Stabilizer

[0062] A colloidal solution of silver nanoparticles was prepared in the same manner as in Example 1, except that 11.137 g of polyvinylpyrrolidone with a MW of 55,000 was used as a stabilizer instead of (1-vinylpyrrolidone)-acrylic acid copolymer. The obtained colloidal solution of silver nanoparticles had a minimum particle diameter of 6.6±1.1 nm and an average particle diameter of about 10-12 nm.

Embodiment 3

[0063] Example 3: Preparation of Colloidal Solution of Silver Nanoparticles by Using Polyoxyethylene Stearate as Stabilizer

[0064] Silver nanoparticles colloidal solution was prepared in the same manner as in Example 1, except that 11.137 g of polyoxyethylene stearate with a MW of ~2,000 was used as a stabilizer instead of (1-vinylpyrrolidone)-acrylic acid copolymer. The average particle diameter of the obtained silver nanoparticle colloidal solution is 7.5±1.8nm.

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Abstract

A metal nanoparticle colloid solution, metal-polymer nanocomposites, and methods for preparing the same are provided. The metal nanoparticle colloid solution and the metal-polymer nanocomposites can be prepared with a variety of polymeric stabilizers and have uniform particle diameter and shape. The metal nanoparticle colloid solution and the metal-polymer nanocomposites have wide applications, for example, as an antibacterial agent, a sterilizer, a conductive adhesiv, conductive ink or an electromagnetic wave shielder for an image display.

Description

technical field [0001] The present invention relates to a colloidal solution of metal nanoparticles, a metal-polymer nanocomposite and a preparation method thereof, more particularly, the present invention relates to metal nanoparticles prepared using various polymer stabilizers and having a uniform particle diameter Colloidal solutions and metal-polymer nanocomposites and methods for their preparation. Background technique [0002] Recently, a method for preparing colloidal dispersions of silver nanoparticles using gamma rays and suitable stabilizers such as polyvinyl alcohol and sodium dodecyl sulfate (SDS) was disclosed (Nature 1985, 317, 344; Materials Letters 1993 , 17, 314). The preparation method using gamma rays is reported to provide silver nanoparticles with uniform diameter distribution. It is known from these famous research reports that the size of metal nanoparticles prepared by those methods is about 8 nm to several tens of nanometers. However, metal nanopa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B22F9/00B22F9/24C09K23/00
CPCB01J13/0043C08K3/08B01J13/0039
Inventor 李武相南相壹闵恩善金承斌申铉石
Owner POSTECH ACAD IND FOUND
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