THE MECHANISM OF HALOGEN ATTACK ON COMPOSITE REVERSE-OSMOSISMEMBRANES

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 2609
Amount: $212,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1987
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Bend Research Inc.
64550 Research Rd, Bend, OR, 97701
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 R J Ray & S B Mccray
 Co-principal Investigators
 (503) 382-4100
Business Contact
Phone: () -
Research Institution
N/A
Abstract
MANY REVERSE-OSMOSIS MEMBRANES COMMERCIALLY AVAILABLE TODAY ARE MADE FROM POLYAMIDE OR POLYUREA MEMBRANES. THESE MEMBRANES GIVE HIGH SALT REJECTION AND HIGH WATER FLUX- YET ARE RAPIDLY DEGRADED WHEN EXPOSED TO TRACE LEVELS OF CHLORINE OR OTHER HALOGEN DISINFECTANTS USED FOR THE PRETREATMENT OF FEED WATERS. EFFORTS TO DEVELOP CHLORINE-RESISTANT MEMBRANES HAVE BEEN SLOW BECAUSE OF THE INCOMPLETE UNDERSTANDING OF THE INTERACTIONS BETWEEN CHLORINE AND THE MEMBRANES. BASED ON PREVIOUS WORK, WE HAVEFORMULATED A MODEL THAT DESCRIBES THE MECHANISMS OF HALOGEN ATTACK ON NITROGEN-CONTAINING MEMBRANES. THE OBJECTIVES OF THIS PROPOSED PROGRAM ARE TWO-FOLD: 1) TO VERIFY THE PROPOSED MECHANISMS BY STUDYING THE REACTIONS OF CHLORINE AND OTHER HALOGENS WITH SPECIFIC FUNCTIONAL GROUPS PRESENT IN POLYAMIDE AND POLYUREA MEMBRANES, AND 2) TO USE THIS INFORMATION TO DEVELOP HIGH-PERFORMANCE CHLORINE-RESISTANT MEMBRANES.

* information listed above is at the time of submission.

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