Synthesis and properties of PI composite films using carbon quantum dots as fillers
Zhang Yuyin,
Guo Hongtao,
Jiang Shaohua,
Hu Zhaoyu,
Zha Guojun,
Liu Kunming,
Hou Haoqing
Affiliations
Zhang Yuyin
College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
Guo Hongtao
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
Jiang Shaohua
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
Hu Zhaoyu
College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
Zha Guojun
College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
Liu Kunming
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China
Hou Haoqing
College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
Polyimide (PI) is widely used in the field of microelectronics because of its excellent thermal, mechanical, optical, and electrical properties. With the development of electronics and information industry, PI as a dielectric material needs to possess low dielectric loss. PI/carbon quantum dots (PI/CQDs) composite films with low dielectric loss were prepared by introducing CQDs into PI matrix. At 25°C and 1 kHz voltage, the dielectric loss of pure PI film is about 0.0057. The dielectric loss of PI/CQDs composite film is about 0.0018, which is about 68% lower than that of pure PI film. The dielectric loss of PI/CQD composite film is greatly reduced while the mechanical properties and thermal properties of PI/CQDs composite film roughly remain unchanged. Due to the cross-linking structure formed between CQDs and PI molecular chain, the relative movement of PI molecular chain is hindered.
