文献类型：期刊文献

英文题名：Enhanced Interfacial and Dielectric Performance for Polyetherimide Nanocomposites through Tailoring Shell Polarities

作者：Zuo, Peiyuan[1];Jiang, Junhao[1];Chen, Donglin[1];Lin, Jingyu[1];Zhao, Zhanpeng[1];Sun, Bowen[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：15

期号：19

起止页码：23792

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20232114117253);WOS:【SCI-EXPANDED(收录号:WOS:000984248600001)】；

基金：This work is supported by the National Natural Science Foundation of China (52073091 and 2171086) , the Natural Science Foundation of Shanghai (20ZR1414600) , and the Fundamental Research Funds for the Central Universities (JKD01221701) . This work is also sponsored by the Shanghai Pujiang Program (22PJ1402500) .

语种：英文

外文关键词：hyperbranched polyimide; interfacial adhesion; dielectric properties; energy storage density; dianhydride group polarities

摘要：Polyimide (PI) and its derivative polyetherimide (PEI) have been widely investigated as promising candidates for dielectric energy storage due to their excellent intrinsic features. However, most of the current research for PI-or PEI-based dielectric nanocomposites only focuses on a certain polar group contained in a dianhydride monomer, while there are very few studies on exploring the effect of a series of polar groups derived from various dianhydride monomers on the dielectric properties of nanocomposites. To fill this gap, we herein fabricated and investigated a series of novel hyperbranched polyimides grafted on barium titanate nanoparticles (HBPI@BT) using different dianhydride monomers and their nanocomposites with the PEI matrix. The results showed that sophisticated hyperbranched structures effectively alleviated the incompatibility between fillers and the matrix, thus significantly improving the bonding energy of nanocomposites, especially for HBPI-S@BT/PEI (797.7 kJ/mol). The Ud of HBPI-S@BT/PEI reached 8.38 J/cm3, which is 3.3 times higher than that of pure PEI. The HBPI-F@BT/PEI nanocomposites achieved high breakdown strength (similar to 500 MV/m) and low dielectric loss (0.008) simultaneously. The dielectric constants of HBPI@BT/PEI nanocomposites remained at a stable level from 25 to 150 degrees C. This work provides us promising hyperbranched structured materials for potentially advanced dielectric applications such as field effect transistors.