Title: Nanoparticles modified with multiple organic acids

Abstract

Surface-modified nanoparticles of boehmite, and methods for preparing the same. Aluminum oxyhydroxide nanoparticles are surface modified by reaction with selected amounts of organic acids. In particular, the nanoparticle surface is modified by reactions with two or more different carboxylic acids, at least one of which is an organic carboxylic acid. The product is a surface modified boehmite nanoparticle that has an inorganic aluminum oxyhydroxide core, or part aluminum oxyhydroxide core and a surface-bonded organic shell. Organic carboxylic acids of this invention contain at least one carboxylic acid group and one carbon-hydrogen bond. One embodiment of this invention provides boehmite nanoparticles that have been surface modified with two or more acids one of which additional carries at least one reactive functional group. Another embodiment of this invention provides boehmite nanoparticles that have been surface modified with multiple acids one of which has molecular weight or average molecular weight greater than or equal to 500 Daltons. Yet, another embodiment of this invention provides boehmite nanoparticles that are surface modified with two or more acids one of which is hydrophobic in nature and has solubility in water of less than 15 by weight. The products of the methods of this invention have specificmore » useful properties when used in mixture with liquids, as filler in solids, or as stand-alone entities. « less

Inventors:

Cook, Ronald Lee ^[1]; Luebben, Silvia DeVito ^[2]; Myers, Andrew William ^[3]; Smith, Bryan Matthew ^[4]; Elliott, Brian John ^[5]; Kreutzer, Cory ^[6]; Wilson, Carolina ^[3]; Meiser, Manfred ^[7]

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+ Show Inventor Affiliations

1. Lakewood, CO
2. Golden, CO
3. Arvada, CO
4. Boulder, CO
5. Superior, CO
6. Brighton, CO
7. Aurora, CO

Issue Date:

2007-07-17

Research Org.:

TDA Research, Inc. (Wheat Ridge, CO)

Sponsoring Org.:

USDOE

OSTI Identifier:

913139

Patent Number(s):

7244498

Application Number:

11/120,650

Assignee:

TDA Research, Inc. (Wheat Ridge, CO)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J2/30 - using agents to prevent the granules sticking together

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/72 - by d-values or two theta-values, e.g. as X-ray diagram
C01P2004/04 - obtained by TEM, STEM, STM or AFM
C01P2004/64 - Nanometer sized, i.e. from 1-100 nanometer
C01P2006/12 - Surface area

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients

C08K3/22 - of metals
C08K3/346 - {Clay}
C08K9/04 - Ingredients treated with organic substances {

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS

C08L2666/54 - Inorganic substances

C - CHEMISTRY C09 - DYES C09C - TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

C09C1/24 - Oxides of iron
C09C1/407 - {Aluminium oxides or hydroxides}

C - CHEMISTRY C09 - DYES C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS

C09D163/00 - Coating compositions based on epoxy resins
C09D5/082 - {characterised by the anti-corrosive pigment}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/2982 - Particulate matter [e.g., sphere, flake, etc.]
Y10T428/2991 - Coated
Y10T428/2993 - Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
Y10T428/2995 - Silane, siloxane or silicone coating
Y10T428/2998 - including synthetic resin or polymer

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DOE Contract Number:  

FG03-00ER82928; FG03-01ER83309

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

77 NANOSCIENCE AND NANOTECHNOLOGY