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- Title
Core–shell structure BST@HBPI nanoparticle/polyetherimide nanocomposite with excellent compatibility, thermal stability and dielectric properties.
- Authors
Xia, Yifan; Lin, Jingyu; Qian, Jun; Liu, Xiaoyun; Zuo, Peiyuan; Zhuang, Qixin
- Abstract
Improving the compatibility and dispersion between nanoparticles and polymers has become the key to enhance the dielectric properties. In addition, dielectric materials should also have excellent dielectric and thermal stability to meet the application under extreme conditions. Herein, we synthesized a core–shell structure BST@HBPI and BST@HBPI/PEI nanocomposite films. HBPI owns a chemical structure similar to polyetherimide (PEI), and the dipole moment of the polar group contained in it is small, so it can enhance the interface interaction between the nanoparticles and the matrix, hence effectively inhibiting the free charge, and reducing the leakage current in composite. The results show that the introduction of HBPI not only effectively improves the compatibility and dispersion of nanoparticles and polymer matrix, but also greatly enhances the dielectric properties and energy storage properties of nanocomposites. Under an electric field of 200 kV mm−1, the minimum charge-discharge efficiency of BST@HBPI/PEI reaches 74.36%, which is 1.33 times of that for BST/PEI (55.97%), and the maximum discharge energy density reaches 5.01 J cm−3, which is 1.28 times comparing to BST/PEI (3.89 J cm−3). Meanwhile, due to the preeminent electrothermal stability of nanoparticles and matrix, nanocomposites can maintain excellent dielectric properties at high temperatures. The dielectric constant of 10 vol% BST@HBPI/PEI (7.56 J cm−3) is 93.24% at 25 °C (8.113 J cm−3) while the dielectric loss at 200 °C (0.04287) is 114.29% when comparing to that at 25 °C (0.03751). This work provides a promising method for manufacturing dielectric materials that can work in extreme environments.
- Subjects
DIELECTRIC properties; NANOPARTICLES; THERMAL stability; ENERGY density; ENERGY storage; POLYETHYLENEIMINE; DIELECTRIC materials
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 20, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-10855-3