Colorless and transparent polyimide nano-composite material membrane and preparation method thereof

• Main Authors: LEI PENG, LU YUNHUA, WANG YONGFEI, HU ZHIZHI, CHI HAIJUN, DONG YAN, ZHANG ZHIQIANG, WANG CUIPING, FANG QINGXU, LI XIAO, XIAO GUOYONG, ZHAO HONGBIN
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2010
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention relates to a colorless and transparent polyimide nano-composite material membrane and a preparation method thereof. The polyimide nano-composite material membrane is prepared by a method of compounding alicyclic dianhydride and fluorinated diamine serving as monomers with a certain amount of inorganic nano-particles by using nano-composite technology and performing thermal imidization with gradient temperature increase. The amount of added nano-particles is controlled between 0.01 and 5.00 weight percent to obtain the colorless and transparent polyimide nano-composite material membrane with high heat resistance. The membrane has a glass transition temperature of over 250 DEG C, a light transmittance of over 90 percent at 450 nanometers and an ultraviolet wavelength of about 300 nanometers, and can be used as a substrate material for a photoelectric device, a semiconductor material, an optical waveguide material and the like.