文献类型：期刊文献

英文题名：Three-phase interfacial design in BaTiO3/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

作者：Zhang, Pengtu[1,2];Yuan, Shiling[2];Song, Xinwang[2];Tang, Junsong[3];Lin, Qilang[4];Liu, Xiaoyun[1];Zhuang, Qixin[1];Mi, Puke[1];Zuo, Peiyuan[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai, Peoples R China;[2]Shandong Inst Petr & Chem Technol, Sch Chem Engn, Dongying, Peoples R China;[3]Jiangsu Guowang High Tech Fiber Co Ltd, Suzhou Inst Green Fiber Technol, Meiyan Ind Concentrat Zone, Suzhou, Peoples R China;[4]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou, Peoples R China

年份：2024

卷号：45

期号：11

起止页码：10220

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20241816000385);WOS:【SCI-EXPANDED(收录号:WOS:001207304500001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073091, 52373073, 52303083, 22171086), Shanghai Pujiang Program (22PJ1402500), Shanghai Rising-Star Program (Program No. 21QA1403900), the Carbon Neutrality Research Institute Fund (CNIF20220205, CNIF20230101), the Scientific Development Foundation of Dongying (DJ2021016), and the Key Laboratory of Advanced Polymeric Materials of Shanghai.

语种：英文

外文关键词：barium titanate; dielectric properties; graphene; interfacial design; polyetherimide

摘要：As core components in electric/electronic fields, dielectric materials have recently received ever-increasing interests. Among them, polymer-based dielectric composites have drawn ever-increasing attentions due to their high-temperature resistance and excellent processibility. However, state-of-art studies mostly focus on the modification of single-phase filler, while the heterogeneous three phase interactions between fillers and polymer matrix are rarely studied. To fill this gap, in this study, a novel strategy of interfacial design and structural construction of three-phase BaTiO3/rGO/polymer nanocomposites have been promoted to simultaneously build interfacial barriers between adjacent rGO nanosheets and to enhance the interfacial polarization of rGO nanosheets for improved dielectric, thermal and mechanical properties. The dielectric constant of 0.6 wt% BT/ARGO/PEI reached 644@1 kHz with a dielectric loss of only 0.218, while these values for 0.5 wt% ARGO/PEI composites are 471 and 0.489, respectively. Meanwhile, the breakdown strength almost doubled (from 48 kVmm(-1) to 87 kVmm(-1)) upon the addition of BaTiO3 (BT) nanoparticles. Moreover, the introduced BT nanoparticles significantly enhanced the intermolecular frictions between different materials and contributed largely to promoted mechanical and thermal properties. We therefore speculate this work establishes a strong foundation for fabricating three heterogeneous-phase high dielectric polymer materials with excellent dielectric, thermal and mechanical properties. Highlights center dot Graphene oxide was modified by APTES and reduced by L-Ascorbic Acid. center dot Three-phase BT/ARGO/PEI composites showed enhanced dielectric properties. center dot The incorporated BT nanoparticles reduced the dielectric loss. center dot The thermal and mechanical properties of BT/ARGO/PEI composites are optimized. center dot Interfacial interactions between different phase of materials are studied.