Choi Dong Joo, Maeng Ju Sung, Ahn Key-One, Jung Myoung Jin, Song Seok Ho, Kim Young-Ho
Division of Materials Science and Engineering, Hanyang University, Seoul, 133-791, Korea.
Nanotechnology. 2014 Sep 19;25(37):375604. doi: 10.1088/0957-4484/25/37/375604. Epub 2014 Aug 22.
Nanocomposites consisting of Cu or Cu2O nanoparticles in various polyimide (PI) films were successfully prepared using polyamic acid (PAA) and Cu powders. Cu powders were dissolved into PAA solutions, and the solutions were spin-coated onto the substrates. Cu or Cu2O nanoparticles were formed in PI film by curing in a reducing or inert atmosphere, respectively. The Cu nanoparticles were transformed to Cu2O nanoparticles by post-heat treatment in an oxidizing atmosphere after curing in a reducing atmosphere. Transmission electron microscopy showed that uniform, round Cu2O nanoparticles 6.0 nm in diameter were dispersed in the PI film by post-heat treatment. The addition of Cu2O nanoparticles in the 4,4'-(hexafluoroisopropylidene)diphthalic anhydride-4,4'-oxydianiline (6FDA-ODA) PI film enhanced the refractive index of the 6FDA-ODA PI film from 1.60 to 1.72 at 633 nm, and the transparency of the nanocomposite film was about 70-90% in the visible region and remained around 90% beyond 550 nm.
采用聚酰胺酸（PAA）和铜粉成功制备了由不同聚酰亚胺（PI）薄膜中的铜或氧化亚铜纳米颗粒组成的纳米复合材料。将铜粉溶解于PAA溶液中，然后将溶液旋涂到基底上。分别在还原或惰性气氛中固化后，PI薄膜中形成铜或氧化亚铜纳米颗粒。在还原气氛中固化后，通过在氧化气氛中进行后热处理，铜纳米颗粒转变为氧化亚铜纳米颗粒。透射电子显微镜显示，经后热处理后，直径为6.0 nm的均匀圆形氧化亚铜纳米颗粒分散在PI薄膜中。在4,4'-（六氟异丙烯基）二邻苯二甲酸酐-4,4'-氧二苯胺（6FDA-ODA）PI薄膜中添加氧化亚铜纳米颗粒，使6FDA-ODA PI薄膜在633 nm处的折射率从1.60提高到1.72，纳米复合薄膜在可见光区域的透明度约为70%-90%，在550 nm以上保持在90%左右。
