Title: Nanosize electropositive fibrous adsorbent

Abstract

Aluminum hydroxide fibers approximately 2 nanometers in diameter and with surface areas ranging from 200 to 650 m.sup.2 /g have been fount to be highly electropositive. When dispersed in water they are able to attach to and retain electronegative particles. When combined into a composite filter with other fibers or particles they can filter bacteria and nano size particulates such as viruses and colloidal particles at high flux through the filter. Such filters can be used for purification and sterilization of water, biological, medical and pharmaceutical fluids, and as a collector/concentrator for detection and assay of mirobes and viruses. The alumina fibers are also capable of filtering sub-micron inorganic and metallic particles to produce ultra pure water. The fibers are suitable as a substrate for growth of cells. Macromolicules such as proteins may be separated from each other based on their electronegative charges.

Inventors:

Tepper, Frederick; Kaledin, Leonid

Issue Date:

Tue Jan 04 00:00:00 EST 2005

Research Org.:

~Individually Owned Patent

Sponsoring Org.:

USDOE

OSTI Identifier:

1175191

Patent Number(s):

6838005

Application Number:

10/177,709

Assignee:

Tepper, Frederick; Kaledin, Leonid

Patent Classifications (CPCs):

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

Show more

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

A61L2/0017 - {Filtration}

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D15/00 - Separating processes involving the treatment of liquids with solid sorbents
B01D15/08 - Selective adsorption, e.g. chromatography
B01D39/06 - Inorganic material, e.g. asbestos fibres, glass beads or fibres

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

B01J20/08 - comprising aluminium oxide or hydroxide
B01J20/10 - comprising silica or silicate
B01J20/28007 - {with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like
B01J20/28016 - {Particle form}
B01J20/28023 - {Fibres or filaments
B01J20/28028 - {Particles immobilised within fibres or filaments}
B01J20/28033 - {Membrane, sheet, cloth, pad, lamellar or mat}
B01J20/28057 - {Surface area, e.g. B.E.T specific surface area}
B01J2220/42 - Materials comprising a mixture of inorganic materials

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 C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

C02F1/281 - {using inorganic sorbents}
C02F2303/04 - Disinfection

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N1/4077 - {by other techniques involving separation of suspended solids}

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

Y10T436/25375 - Liberation or purification of sample or separation of material from a sample [e.g., filtering, centrifuging, etc.]
Y10T436/255 - including use of a solid sorbent, semipermeable membrane, or liquid extraction

Show less

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE