Spray forming polymer membranes, coatings and films

Details Spray forming polymer membranes, coatings and films Spray forming polymer membranes, coatings and films

1991-08-21

1993-10-12

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050027, 427246, B01D 6700

Patent

active

052522121

ABSTRACT:
A method of forming a polymer film having controlled physical and chemical characteristics, wherein a plume of nebulized droplets of a polymer or polymer precursor is directed toward a substrate from a converging/diverging nozzle having a throat at which the polymer or a precursor thereof is introduced and an exit from which the nebulized droplets of the polymer or precursor thereof leave entrained in a carrier gas. Relative movement between the nozzle and the substrate is provided to form a polymer film. Physical and chemical characteristics can be controlled by varying the deposition parameters and the gas and liquid chemistries. Semipermeable membranes of polyphosphazene films are disclosed, as are a variety of other polymer systems, both porous and non-porous.

REFERENCES:
patent: 3615024 (1971-10-01), Michaels
patent: 3808091 (1974-04-01), Aokl et al.
patent: 4710204 (1987-12-01), Kraus et al.
patent: 4797187 (1989-01-01), Davis et al.

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