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Methods for producing films using supercritical fluid

Patent ·
OSTI ID:1174897
;
A method for forming a continuous film on a substrate surface that involves depositing particles onto a substrate surface and contacting the particle-deposited substrate surface with a supercritical fluid under conditions sufficient for forming a continuous film from the deposited particles. The particles may have a mean particle size of less 1 micron. The method may be performed by providing a pressure vessel that can contain a compressible fluid. A particle-deposited substrate is provided in the pressure vessel and the compressible fluid is maintained at a supercritical or sub-critical state sufficient for forming a film from the deposited particles. The T.sub.g of particles may be reduced by subjecting the particles to the methods detailed in the present disclosure.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC06-76RL01830;
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Number(s):
6,749,902
Application Number:
10/157,591
OSTI ID:
1174897
Country of Publication:
United States
Language:
English

References (7)

A new study of glass transition of polymers by high pressure DSC journal June 1998
High-pressure DSC study of thermal transitions of a poly(ethylene terephthalate)/carbon dioxide system journal June 1999
Particle design using supercritical fluids: Literature and patent survey journal August 2001
Performance of capillary restrictors in supercritical fluid chromatography journal August 1986
Rapid expansion of supercritical fluid solutions: solute formation of powders, thin films, and fibers journal November 1987
Solubility of Polymers and Copolymers in Supercritical CO 2 journal January 1996
Dissolving Perfluoropolymers in Supercritical Carbon Dioxide journal September 1995

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36 MATERIALS SCIENCE