SURFACE CHEMICAL REACTION TECHNIQUES FOR ULTRATHIN COMPOSITEMEMBRANES

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$50,000.00
Award Year:
1991
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
14363
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Membrane Technology And Resear
1360 Willow Rd Suite 103, Menlo Park, CA, 94025
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Richard W. Baker
President
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
MEMBRANE DIFFUSION IS AN INHERENTLY SLOW PROCESS. CONSEQUENTLY, MEMBRANE-BASED SEPARATION PROCESSES CAN ONLY BE ECONOMICALLY VIABLE IF EXTREMELY THIN, DEFECT-FREE MEMBRANES ARE USED. THIN-FILM COMPOSITE MEMBRANES WITH A PERMSELECTIVE LAYER THICKNESS DOWN TO ABOUT 0.5 MUM CAN BE MADE BY PRESENTLY AVAILABLE TECHNIQUES. THE GOAL OF THIS PROGRAM IS TO DEVELOP THE TECHNOLOGY FOR MAKING INDUSTRIAL-SCALE COMPOSITE MEMBRANES WITH A PERMSELECTIVE LAYER THICKNESS OF 0.1 MUM OR BELOW. THE MEMBRANES WILL BE MADE BY SOLUTION COATING AN ELASTOMERIC POLYMER MATERIAL ONTO A MICROPOROUS SUPPORT. THE UPPER SURFACE OF THE COATED LAYER WILL THEN BE CONVERTED TO A GLASSY CROSSLINKED ZONE BY SURFACE TREATMENT WITH A REACTIVE ORANGIC SPECIES. THE RESULT WILL BE A ZONE OF THICKNESS LESS THAN 0.1 MUM WITH GREATLY ENHANCED SELECTIVITY. BECAUSE THE GLASSY LAYER IS SO THIN, THE FLUX WILL ALSO BE VERY HIGH COMPARED WITH THAT OF A STANDARD COMPOSITE MEMBRANE WITH A GLASSY PERMSELECTIVE LAYER.

* information listed above is at the time of submission.

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