Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same

a technology of organic matrix and multi-component particles, which is applied in the field of inorganic nanoparticles, can solve the problems of high limit in the choice of surfactants, polymers and/or additives

Inactive Publication Date: 2006-04-20
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] In another embodiment, the invention is to a process for forming a dispersion, the process comprising the steps of: (a) providing a plurality of multi-component particles, each multi-component particle comprising a plurality of inorganic nanoparticles distributed in an organic matrix, wherein the plurality of multi-component parti

Problems solved by technology

In contrast, during conventional wet chemical synthesis processes, one is highly limited in the choice of surfactants, polymers and/or additives that may be implemented in the synthesis process due to the fact that the use of these compositions in wet chemical synthesis processes will usually be involved in controlling the nanopart

Method used

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  • Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same
  • Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same
  • Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same

Examples

Experimental program
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process examples

A. Process Examples

Example 1

Silver Nanoparticles and Polymer Matrix from AgNO3

[0251] A precursor medium containing silver nitrate, AgNO3 and PVP, dissolved in deionized water is prepared. The precursor medium contains:

AgNO37.5 gPVP0.5 gDeionized H2O 92 g

This precursor medium is designed for 8 wt % loading of solids, and to yield particles consisting of 46 vol % silver metal in a PVP matrix. The precursor medium is processed on the lab scale system described above, at a temperature of 400° C. and a carrier gas flow rate of 15 liter per minute (lpm). XRD analysis of the resulting powder shows strong peaks of silver with the presence of small amount of silver nitrate.

example 2

Silver Nanoparticles and Polymer Matrix from AgNO3 With Use of Ethanol

[0252] A precursor medium containing silver nitrate, AgNO3 and PVP, dissolved in deionized water is prepared. The precursor medium contains:

AgNO315.0 gPVP 0.5 gDeionized H2O74.5 gEthanol10.0 g

This precursor medium is designed for 15.5 wt % loading of solids, and to yield particles consisting of 64 vol % silver metal in a PVP matrix. The precursor medium is processed on the lab scale system described above, at a temperature of 400° C. and a carrier gas flow rate of 15 liter per minute (lpm). XRD analysis of the resulting powder shows strong peaks of silver with the presence of silver nitrate.

example 3

Silver Nanoparticles and Polymer Matrix from AgNO3 With Use of Ethylene Glycol

[0253] A precursor medium containing silver nitrate, AgNO3 and PVP, dissolved in deionized water is prepared. The precursor medium contains:

AgNO315.0 gPVP 0.5 gDeionized H2O74.5 gEthylene glycol15.0 g

This precursor medium is designed for 15.5 wt % loading of solids, and to yield particles consisting of 64 vol % silver metal in a PVP matrix. The precursor medium is processed on the lab scale system described above, at a temperature of 250° C. and a carrier gas flow rate of 15 liter per minute (lpm). Under these conditions, the vapor quickly condensed onto the filter paper, as a result, the pressure built up quickly in less than 5 min. XRD analysis of the resulting powder shows strong peaks of silver with the presence of silver nitrate.

[0254] The precursor medium is also processed on the lab scale system at 400° C. and a carrier gas flow rate of 15 lpm. XRD pattern for this powder shows mainly silver pe...

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Abstract

Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same. A flowing aerosol is generated that includes droplets of a precursor medium dispersed in a gas phase. The precursor medium contains a liquid vehicle and at least one precursor. At least a portion of the liquid vehicle is removed from the droplets of precursor medium under conditions effective to convert the precursor to the nanoparticles or the matrix and form the multi-component particles.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit of Provisional Patent Application Ser. No. 60 / 599,847, filed on Aug. 7, 2004, the entirety of which is incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention relates to inorganic nanoparticles. More particularly, the invention relates to multi-component particles comprising inorganic nanoparticles distributed in an organic matrix, and to processes for making and using such multi-component particles. BACKGROUND OF THE INVENTION [0003] Nanoparticles, and processes for making nanoparticles, have been the subject of recent interest and research because of the advantages provided by nanoparticles over larger sized particulate materials. One advantage of nanoparticles is they have a greater surface area and surface energy, which is useful in a variety of applications, including catalysis, electrocatalysis, absorbance, chemical separations and bio-separation applications. Nanopar...

Claims

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Application Information

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IPC IPC(8): A61K9/14A61K9/50
CPCB01J13/0043B01J13/0095C08J3/203C08J2339/06
Inventor KODAS, TOIVO T.HAMPDEN-SMITH, MARK J.HAUBRICH, SCOTT THOMASYU, HENGHARDMAN, NED JAYKORNBREKKE, RALPH E.STUMP, AARON D.KUNZE, KLAUSDERICOTTE, DAVIDVANHEUSDEN, KAREL
Owner CABOT CORP
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