Accession Number : AD0910122

Title :   A Study of Bonding Cellulose Acetate to Polyarylsulfone,

Corporate Author : ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR VA

Personal Author(s) : Cross, Paul William

Report Date : FEB 1973

Pagination or Media Count : 27

Abstract : The objective of this study was to develop a method by which ultrathin films (500 to 1500 angstroms in thickness) of cellulose acetate could be bonded to microporous supports of polyarylsulfone. In addition to the bonding requirements, the method developed could not adversely affect the salt (NaCl) rejecting and flow characteristics of the cellulose acetate-polysulfone composite. A successful method was found to be the application of a dilute solution (1.5 percent by weight) of Resyn 26-2404 to the polysulfone before casting the cellulose acetate membrane. A TYPICAL COMPOSITE WITH A SPRAYED APPLICATION OF Resyn 26-2404 had a salt rejection and water flux before dry cycle (defined as heating for 24 hours at 110 F) of 97 percent and 8.8 gal/sq ft/day respectively. After dry cycle, the average salt rejection was 95 percent and the water flux remained at approximately 8.8 gal/sq ft/day. Additional drying cycles were found to degrade the composite membranes. (Author-PL)

Descriptors :   *DESALINATION), *BONDING), (*WATER, (*CELLULOSE ACETATES, OSMOSIS, MEMBRANES, COMPOSITE MATERIALS, ORGANIC SULFUR COMPOUNDS, THICKNESS, ADHESIVES, TEST EQUIPMENT, ORGANIC SOLVENTS, CROSSLINKING(CHEMISTRY), BONDED JOINTS.

Subject Categories : Laminates and Composite Materials
      Plastics
      Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE