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Continued Evaluation of in situ-Formed Condensation Polymers for Reverse Osmosis Membranes.

PB253193

Publication Date	1976
Personal Author	Cadotte, J. E.; Cobian, K. E.; Forester, R. H.; Petersen, R. J.
Page Count	90
Abstract	A research program was carried out on in situ-formed condensation membranes for seawater desalination that involved three parts: (1) new, exploratory membrane development, (2) further characterization studies on a previously reported membrane, NS-200, and (3) refinement of an underwater extrusion process for microporous polysulfone sheeting. Among new membrane compositions investigated were m-phenylenediamine/formaldehyde, polyacrolein-based systems, crosslinked vinyl and acrylic copolymers, poly (piperazine isophthalamide), phenolic and aromatic polyester membranes, and poly (isophthaloyl oxalamidrazone) membranes. The phenylenediamine/formaldehyde membrane, in particular, exhibited up to 44 gfd at 97 to 98.7 percent salt rejection, when tested against synthetic seawater at 1500 psig. Characterization studies on the NS-200 membrane system covered SEM microscopy, chemistry, elemental analysis, organics rejection, and resistance to biological degradation. A process for underwater extrusion of flat, microporous polysulfone sheeting was developed to the point of fabrication of 25-inch-wide material that was suitable for NS-200 fabrication.
Keywords	Surface chemistry Membranes Condensation resins Desalting Polymerization Electron microscopy Supports Sea water Crosslinking Chemical analysis Infrared spectroscopy Thermal analysis Absorbers(Materials) Casting Preparation Polymers Acroleins Vinyl copolymers Acrylic copolymers Phenols Polyester resins Formaldehyde Diamines Piperazines Flux Performance evolution Reverse osmosis desalination Membrane supports Polysulfone Spiral wound membranes
Source Agency	Office of Water Research and Technology
NTIS Subject Category	99C - Polymer Chemistry 99B - Industrial Chemistry & Chemical Process Engineering
Corporate Authors	Midwest Research Inst., Minneapolis, Minn. North Star Research Div.; Office of Water Research and technology, Washington, D.C.
Document Type	Technical Report
Title Note	Final rept. 22 Oct 74-21 Nov 75.
NTIS Issue Number	197616
Contract Number	DI-14-30-3298

Continued Evaluation of in situ-Formed Condensation Polymers for Reverse Osmosis Membranes.

Continued Evaluation of in situ-Formed Condensation Polymers for Reverse Osmosis Membranes.
PB253193

Publication Date	1976
Personal Author	Cadotte, J. E.; Cobian, K. E.; Forester, R. H.; Petersen, R. J.
Page Count	90
Abstract	A research program was carried out on in situ-formed condensation membranes for seawater desalination that involved three parts: (1) new, exploratory membrane development, (2) further characterization studies on a previously reported membrane, NS-200, and (3) refinement of an underwater extrusion process for microporous polysulfone sheeting. Among new membrane compositions investigated were m-phenylenediamine/formaldehyde, polyacrolein-based systems, crosslinked vinyl and acrylic copolymers, poly (piperazine isophthalamide), phenolic and aromatic polyester membranes, and poly (isophthaloyl oxalamidrazone) membranes. The phenylenediamine/formaldehyde membrane, in particular, exhibited up to 44 gfd at 97 to 98.7 percent salt rejection, when tested against synthetic seawater at 1500 psig. Characterization studies on the NS-200 membrane system covered SEM microscopy, chemistry, elemental analysis, organics rejection, and resistance to biological degradation. A process for underwater extrusion of flat, microporous polysulfone sheeting was developed to the point of fabrication of 25-inch-wide material that was suitable for NS-200 fabrication.
Keywords	Surface chemistry Membranes Condensation resins Desalting Polymerization Electron microscopy Supports Sea water Crosslinking Chemical analysis Infrared spectroscopy Thermal analysis Absorbers(Materials) Casting Preparation Polymers Acroleins Vinyl copolymers Acrylic copolymers Phenols Polyester resins Formaldehyde Diamines Piperazines Flux Performance evolution Reverse osmosis desalination Membrane supports Polysulfone Spiral wound membranes
Source Agency	Office of Water Research and Technology
NTIS Subject Category	99C - Polymer Chemistry 99B - Industrial Chemistry & Chemical Process Engineering
Corporate Authors	Midwest Research Inst., Minneapolis, Minn. North Star Research Div.; Office of Water Research and technology, Washington, D.C.
Document Type	Technical Report
Title Note	Final rept. 22 Oct 74-21 Nov 75.
NTIS Issue Number	197616
Contract Number	DI-14-30-3298