Silver-Polyimide Nanocomposite Membranes: Self-Generated Highly Reflective Flexible Mirrored Surfaces

2003 ◽  
Vol 775 ◽  
Author(s):  
R. E. Southward ◽  
M. Pevzner ◽  
D.W. Thompson
Keyword(s):  
Silver Film ◽  
Amic Acid ◽  
Single Stage ◽  
Nanocomposite Membranes ◽  
Polyimide Films ◽  
Polyimide Nanocomposite ◽  
Metallization Process

AbstractThe synthesis of reflective silvered polyimide films by a single-stage auto-metallization process entailing the (hexafluoroacetylacetonato)silver(I) complex dissolved in solutions of poly(amic acid)s and polyimides formed from 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropanedianhydride (6FDA) and 2,2-bis(4-(4-aminophenoxy)hexafluoropropane (4-BDAF) is described. Heating cast silver(I)-poly(amic acid)/polyimide films effects silver(I) reduction and nanoaggregation giving reflective films for Ag concentrations from 6-10 wt %. A6% silver film gives specular reflectivies greater than 80%. Films prepared from the soluble fully imidized form of 6FDA/4-BDAF were less reflective.

Silver-Polyimide Nanocomposite Films Yielding Highly Reflective Surfaces

2001 ◽  
Vol 707 ◽  
Author(s):  
Robin E. Southward ◽  
C. J. Dean ◽  
J. L. Scott ◽  
S. T. Broadwater ◽  
D. W. Thompson
Keyword(s):  
Composite Films ◽  
Weight Percent ◽  
Amic Acid ◽  
Nanocomposite Films ◽  
Polyimide Films ◽  
Electrically Conductive ◽  
Reflective Surface ◽  
Solution Cast ◽  
Surface Metal ◽  
Polyimide Nanocomposite

ABSTRACTHighly reflective surface-metallized flexible polyimide films have been prepared by the incorporation of the soluble silver ion complex (1,1,1-trifluoroacetylacetonato)silver(I) into dimethylacetamide solutions of the poly(amic acid) prepared from 2,2-bis(3,4-dicarboxyphenyl)-hexafluoropropane dianhydride (6FDA) and 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoro-propane (4-BDAF). Thermal curing of solution cast silver(I)-poly(amic acid) films leads to cycloimidization of the amic acid with concommitant silver(I) reduction and formation of a reflective surface-silvered film at 8 and 13 weight percent silver. The metallized films are thermally stable and flexible with mechanical properties similar to those of the parent polyimide. TEM reveals that the bulk (interior) of the polyimide composite films have 5-20 nanometer-sized silver particles with a surface layer of silver metal ca. 80 nm thick. Neither the bulk nor the surface of the films is electrically conductive. Adhesion of the surface metal to polyimide is excellent.

Silver-Polyimide Nanocomposite Films Yielding Highly Reflective Surfaces

2001 ◽  
Vol 703 ◽  
Author(s):  
Robin E. Southward ◽  
C. J. Dean ◽  
J. L. Scott ◽  
S. T. Broadwater ◽  
D. W. Thompson
Keyword(s):  
Composite Films ◽  
Weight Percent ◽  
Amic Acid ◽  
Nanocomposite Films ◽  
Polyimide Films ◽  
Electrically Conductive ◽  
Reflective Surface ◽  
Solution Cast ◽  
Surface Metal ◽  
Polyimide Nanocomposite

ABSTRACTHighly reflective surface-metallized flexible polyimide films have been prepared by the incorporation of the soluble silver ion complex (1,1,1-trifluoroacetylacetonato)silver(I) into dimethylacetamide solutions of the poly(amic acid) prepared from 2,2-bis(3,4-dicarboxyphenyl)-hexafluoropropane dianhydride (6FDA) and 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoro-propane (4-BDAF). Thermal curing of solution cast silver(I)-poly(amic acid) films leads to cycloimidization of the amic acid with concommitant silver(I) reduction and formation of a reflective surface-silvered film at 8 and 13 weight percent silver. The metallized films are thermally stable and flexible with mechanical properties similar to those of the parent polyimide. TEM reveals that the bulk (interior) of the polyimide composite films have 5-20 nanometer-sized silver particles with a surface layer of silver metal ca. 80 nm thick. Neither the bulk nor the surface of the films is electrically conductive. Adhesion of the surface metal to polyimide is excellent.

Synthesis of Surface-Metallized Polyimide Films via in Situ Reduction of (Perfluoroalkanoato)silver(I) Complexes in a Poly(amic acid) Precursor

1998 ◽  
Vol 10 (5) ◽  
pp. 1408-1421 ◽  
Author(s):  
Robin E. Southward ◽  
Christopher M. Boggs ◽  
David W. Thompson ◽  
Anne K. St. Clair
Keyword(s):  
Amic Acid ◽  
In Situ Reduction ◽  
Polyimide Films ◽  
Acid Precursor

scholarly journals All-Wet Metallization Process for Transparent Polyimide Films

2013 ◽  
Vol 417 ◽  
pp. 012019
Author(s):  
S Ikeda ◽  
Y Kobayashi ◽  
Y Fujiwara ◽  
K Akamatsu ◽  
H Nawafune
Keyword(s):  
Polyimide Films ◽  
Metallization Process
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