Effect of silane coupling agent KH550 on the dielectric properties of CaCu3Ti4O12/polyurethane composite films

被引：13

作者：

Bu, Qi ^{[1
]}

Yin, Shuang ^{[2
]}

Wan, Wei ^{[1
]}

Zeng, Sisi ^{[1
]}

Zhou, Shiyao ^{[1
]}

Yu, Lei ^{[3
]}

Ouyang, Yuejun ^{[1
]}

机构：

[1] Huaihua Univ, Coll Chem & Mat Engn, Hunan Engn Lab Preparat Technol Polyvinyl Alcohol, Huaihua Key Lab Preparat Ceram Mat & Devices, Huaihua 418000, Peoples R China

[2] Anhui Polytech Univ, Ctr Adv Ceram, Sch Mat Sci & Engn, Wuhu 241000, Peoples R China

[3] Changshu Inst Technol, Sch Mat Engn, Changshu 215500, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 07期

关键词：

Dielectric properties; Coupling agent; Functional applications; FLUORIDE) COMPOSITES; THERMAL-CONDUCTIVITY; PERFORMANCE; NANOCOMPOSITES; FABRICATION; RUBBER;

D O I：

10.1016/j.ceramint.2024.01.145

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Flexible CaCu3Ti4O12 (CCTO)/polyurethane dielectric composite films were fabricated, and the effects of the silane coupling agent, 3-Aminopropyltriethoxysilane (KH550), on the dielectric properties of the composite films were investigated. It was found that using KH550 significantly improved interfacial compatibility between the CCTO filler and the polyurethane matrix, leading to the reduction of dielectric loss and conductivity, and an increase in the dielectric breakdown strength. At 100 Hz, the composite film with a 3 wt% KH550 dosage exhibited a dielectric constant of 53.1 and a dielectric loss of only 0.068 (a 73.8 % reduction compared to the composite film with untreated CCTO particles). The composite films with KH550-modified CCTO particles exhibited a maximum breakdown strength of 18.5 kV/mm, showing a 58.1 % increase compared to the composite film with untreated CCTO particles. Moreover, introducing KH550 was beneficial in reducing the variation of dielectric properties with temperature, thereby enhancing the reliability of polyurethane based dielectric composite materials in practical applications.

引用

页码：12389 / 12396

页数：8

共 37 条

[1] Core-shell structured poly(vinylidene fluoride)-grafted-BaTiO3 nanocomposites prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization of VDF for high energy storage capacitors [J].