A surface modification of KTa0.5Nb0.5O3 by APDS and its enhanced dielectric properties for polyimide nanocomposites

被引：4
|
作者：
Lin, Jiaqi [1 ,2 ]
Yan, Ni [1 ]
Liu, Xinmei [1 ]
Yang, Wenlong [1 ]
Wang, Yu [1 ]
Zuo, Yuhang [1 ]
Sun, Hongguo [3 ]
机构：
[1] Harbin Univ Sci & Technol, Harbin 150001, Peoples R China
[2] Harbin Univ Sci & Technol, Key Lab Educ, Harbin 150080, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Composites Engn Lab, Changchun 130022, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2022年 / 31卷
基金：
中国国家自然科学基金;
关键词：
Composite materials; Electrical properties; Surface modification; ENERGY-STORAGE;
D O I：
10.1016/j.mtcomm.2022.103615
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, KTN-NH2/PI nanocomposites with high breakdown strength and low dielectric loss were obtained by modifying the KTa0.5Nb0.5O3 surface with 3-(2-aminoethylamino) propylmethyldimethoxysilane (APDS). Compared with KTN/PI, the loss tangent (tan delta) of KTN-NH2/PI was decreased. The breakdown strength (Eb) could reach to 242.12 kV/mm, which is about 1.49 times higher than that of KTN/PI. Based on the molecular dynamics simulation, the interaction between the modified KTN-NH2 and the PI matrix was higher than the KTN/ PI, which would reduce the tan delta by restraining the dipole orientation polarizations. Moreover, the increase of hydrogen bonds improve the interfacial compatibility, which reduce the electric field distortion of organicinorganic interface and improve Eb.
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页数：5
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