WO2006031229A1 - Method of producing metal-containing particles - Google Patents
Method of producing metal-containing particles Download PDFInfo
- Publication number
- WO2006031229A1 WO2006031229A1 PCT/US2004/029891 US2004029891W WO2006031229A1 WO 2006031229 A1 WO2006031229 A1 WO 2006031229A1 US 2004029891 W US2004029891 W US 2004029891W WO 2006031229 A1 WO2006031229 A1 WO 2006031229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- silver
- particles
- containing particles
- solution
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G5/00—Compounds of silver
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/30—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y5/00—Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/413—Nanosized, i.e. having sizes below 100 nm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Definitions
- This invention is directed generally to particles, and more particularly to methods of making micro-particles and/or nano-particles.
- Silver-containing inorganic microbiocides have recently been developed and utilized as antimicrobial agents on and within a plethora of different substrates and surfaces.
- microbiocides have been adapted ⁇ for incorporation within melt spun synthetic fibers, as taught within Japanese unexamined Patent Application No. Hl 1-124729, to provide certain fabrics which selectively and inherently exhibit antimicrobial characteristics.
- attempts have been made to apply such specific microbiocides on the surfaces of fabrics and yarns with little success from a
- the present invention provides a method of producing metal-containing particles.
- the metal-containing particles are micro-sized and/or nano-sized particles.
- the metal is complexed with an alkali agent to form the particles.
- the metal is silver and the particles include silver hydroxide.
- the particles have anti ⁇ microbial properties.
- the particles may also provide anti-fungal properties, anti-static properties, and/or conductive properties.
- the particles may range in size from about 0.01 to about 300 ⁇ m.
- the present invention provides a method of preparing metal-based particles, hi one aspect, the method is used to form micro-sized and/or nano-sized
- ⁇ WP195340.2 ⁇ 3 particles that include a metal.
- the metal is silver.
- These micro-sized and/or nano-sized particles have utility in a wide variety of different applications due to their size. Additionally, these particles retain the anti-microbial, anti-fungal, anti-static, and/or conductive properties of the metal used. As a result, micro-sized and/or nano- sized particles including silver offer one or more properties such as anti-microbial, anti ⁇ static and/or conductive.
- the present invention provides a method of making micro-sized and/or nano-sized metal-containing particles.
- the metal is silver.
- the metal may be copper, aluminum, zinc, nickel, or the like.
- the method makes micro-sized and/or nano-sized particles that contain a metal, such as silver.
- micro-sized particles are particles that have a diameter of from about 1 to about 300 ⁇ m.
- nano-sized particles are particles that have a diameter of from about 0.01 to about 1 ⁇ m.
- the method may be used to form micro-size particles only, nano-sized particles only, or a combination thereof, with the resulting mixture either being used as a mixture, or further including a separation step to sort the particles into different size ranges.
- a separation step is -a screening step to separate the particles into different sizes.
- the methods of the present invention form these metal-containing particles using a series of process steps, although not all process steps are necessary for each embodiment.
- the first step is to take a source of the metal, such as silver nitrate powder for embodiments wherein silver particles are to be formed, and dissolve it in water.
- the water is de-ionized water.
- a pre- dissolved silver nitrate solution may be used provided the amount of water in the solution is known.
- the above mentioned solution may then treated with an alkali solution.
- the alkali solution is sodium hydroxide.
- Sodium hydroxide may be used due to its great tendency to complex with the metallic solution.
- any alkali solution that is able to complex with the metallic solution used in a particular embodiment may be used in the present invention.
- the metallic solution is silver nitrate dissolved in DI water.
- Other alkali solutions that may be used include, but are not limited to, ammonium hydroxide.
- the reaction may take place at room temperature, or at a temperature of from about 15 to about 30° C.
- the alkali solution complexes with the metal to form a precipitate containing the metal.
- brown precipitate is formed as the sodium hydroxide is added.
- the solution may be stirred while the precipitate is forming.
- the resultant mixture may be allowed to settle down for a period of time to permit settling of any precipitate. The amount of time permitted for settling may vary, but may be from about 5 to about 15 minutes.
- the precipitate is then removed.
- the precipitate may be filtered using standard filter paper, such as a Buckner funnel.
- the solution may be neutralized.
- an acid may be used to bring the solution to a pH of approximately 7.
- sulfuric acid may be used, although other acids may also be used including, but not limited to, hydrochloric acid and nitric acid, among others. Bringing the pH of the solution to about 7 is beneficial in that it will facilitate easy processing from waste treatment point of view, although this step is not necessary in the formation of the micro-sized and nano-sized particles of the present invention.
- the precipitate is then rinsed with water, such as deionized water.
- water such as deionized water.
- the ' water is, beneficially ⁇ used to wash the precipitate thoroughly. Washing of the precipitate helps facilitate nano- and micro-sized particles of the complexed metal precipitate to be collected in pure form.
- the resulting precipitate includes nano- and micro-sized particles of silver hydroxide. The rinsing may be done anywhere, including within the funnel itself.
- the precipitate may then be dried in a conventional oven or other drying mechanism until the precipitate is substantially dry.
- the drying temperature is from about 50 to about 90° C.
- the resulting product includes the micro-sized and/or nano-sized particles of the present invention.
- the micro-sized and/or nano-sized particles of the present invention include silver, the beneficial properties of silver are retained, even with the smaller size of the particles.
- the particles of the present invention may be used in any application taking advantage of one or more of the beneficial properties of silver. These properties include, but are not limited to, anti ⁇ microbial, anti-fungal, anti-static, conductive, electromagnetic interference (EMI) shielding, filtration, or a combination thereof.
- EMI electromagnetic interference
- the solution was neutralized using 50% sulfuric acid.
- the precipitate was then rinsed with deionized water using 50 - 100 ml at a time through the buckner funnel.
- Example 1 The resultant nano powder obtained from Example 1 was then subjected to high heat (i.e. greater than about >100° C) for a few minutes. This heating resulted in the formation of shiny white micro- and nano-sized particles of silver. The resultant powder weighed approximately 43 gm.
- Example 1 The resultant powder from Example 1 was then incorporated into the outer surface of a hydrogel bandage at the ratio of 10: 1 by weight of the hydrogel to the weight of the silver powder. The surface was dipped to apply the hydrogel mixture to the surface. This sample was then subjected to Dow Corning Corporate Test Method 0923 using Staphylococcus aureus ATCC 6538. After 1 hour the organism count CFU/ml reduced from 1.6 x 10 5 at zero time to ⁇ 10. The percentage reduction was >99.99%. As
- Example 1 The resultant powder from Example 1 was then incorporated into the outer surface of a hydrogel bandage at the ratio of 10:1 by weight of the hydrogel to the weight of the silver powder and then subjected to the same test as Example 3 over a period of 4 hours.. The reduction was again 99.99%. This clearly suggests the enormous surface area of the nano particles and its effectiveness in small quantities.
- Example 1 The resultant powder from Example 1 was then incorporated into the outer surface of a hydrogel bandage at the ratio of 100:1 by weight of the hydrogel to the weight of the silver powder and then subjected to the same test as Example 3 over a period of 4 hours.
- the reduction was an amazing 94%, again indicating the effectiveness of the nano particles as well as the surface area benefits.
- the test result also indicates a great zone of inhibition of the nano particles.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nanotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Plant Pathology (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Pest Control & Pesticides (AREA)
- Dentistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biophysics (AREA)
- Biotechnology (AREA)
- General Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Pharmacology & Pharmacy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04788722A EP1831104A1 (en) | 2003-09-09 | 2004-09-09 | Method of producing metal-containing particles |
PCT/US2004/029891 WO2006031229A1 (en) | 2004-09-10 | 2004-09-10 | Method of producing metal-containing particles |
CA002556674A CA2556674A1 (en) | 2004-09-10 | 2004-09-10 | Method of producing metal-containing particles |
AU2004320908A AU2004320908A1 (en) | 2004-09-10 | 2004-09-10 | Method of producing metal-containing particles |
CN200480026288.4A CN1894164A (en) | 2004-09-10 | 2004-09-10 | Method for preparing particles containing metal |
JP2007531147A JP2008512340A (en) | 2004-09-10 | 2004-09-10 | Method for producing metal-containing fine particles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2004/029891 WO2006031229A1 (en) | 2004-09-10 | 2004-09-10 | Method of producing metal-containing particles |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006031229A1 true WO2006031229A1 (en) | 2006-03-23 |
Family
ID=36060339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/029891 WO2006031229A1 (en) | 2003-09-09 | 2004-09-10 | Method of producing metal-containing particles |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2008512340A (en) |
CN (1) | CN1894164A (en) |
CA (1) | CA2556674A1 (en) |
WO (1) | WO2006031229A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100942418B1 (en) | 2009-08-28 | 2010-02-17 | 한국지질자원연구원 | Fabrication method of cuo nano-particle and fabrication method of cuo nano-fluid using thereof |
CN105566864A (en) * | 2015-12-14 | 2016-05-11 | 广东弘擎电子材料科技有限公司 | Antistatic release film |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4023961A (en) * | 1974-04-11 | 1977-05-17 | Plessey Incorporated | Method of producing powdered materials |
US4080210A (en) * | 1975-12-08 | 1978-03-21 | Shoei Chemical Incorporated | Method and apparatus for preparing uniformly-sized fine particles |
US20020076539A1 (en) * | 1996-12-26 | 2002-06-20 | Shigeo Nakamura | Process for producing a multi-layer printer wiring board |
-
2004
- 2004-09-10 JP JP2007531147A patent/JP2008512340A/en not_active Withdrawn
- 2004-09-10 CA CA002556674A patent/CA2556674A1/en not_active Abandoned
- 2004-09-10 CN CN200480026288.4A patent/CN1894164A/en active Pending
- 2004-09-10 WO PCT/US2004/029891 patent/WO2006031229A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4023961A (en) * | 1974-04-11 | 1977-05-17 | Plessey Incorporated | Method of producing powdered materials |
US4080210A (en) * | 1975-12-08 | 1978-03-21 | Shoei Chemical Incorporated | Method and apparatus for preparing uniformly-sized fine particles |
US20020076539A1 (en) * | 1996-12-26 | 2002-06-20 | Shigeo Nakamura | Process for producing a multi-layer printer wiring board |
Also Published As
Publication number | Publication date |
---|---|
CN1894164A (en) | 2007-01-10 |
JP2008512340A (en) | 2008-04-24 |
CA2556674A1 (en) | 2006-03-23 |
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