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Silver-Polyimide Nanocomposite Films Yielding Highly Reflective Surfaces

机译:银-聚酰亚胺纳米复合膜可产生高反射率的表面

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Highly 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.
机译:通过将可溶性银离子络合物(1,1,1-三氟乙酰丙酮丙酮)银(I)掺入由2,2-双制备的聚(酰胺酸)的二甲基乙酰胺溶液中,可以制备出高反射性的表面金属化柔性聚酰亚胺薄膜。 (3,4-二羧苯基)-六氟丙烷二酐(6FDA)和2,2-双[4-(4-氨基苯氧基)苯基]六氟丙烷(4-BDAF)。溶液流延银(Ⅰ)-聚(酰胺酸)薄膜的热固化导致酰胺酸的环酰亚胺化,伴随着银(Ⅰ)的还原,并在银的重量百分比为13%和13%时形成反射性表面镀银薄膜。金属化的膜是热稳定的并且具有与母体聚酰亚胺相似的机械性能的柔性。 TEM显示,聚酰亚胺复合膜的整体(内部)具有5-20纳米尺寸的银颗粒,其表面层具有约2μm的银金属。 80纳米厚。薄膜的主体或表面都不导电。表面金属与聚酰亚胺的粘合性极好。

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