期刊
POLYMER TESTING
卷 110, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2022.107576
关键词
Dielectric constant; Thermal conductivity; Mechanical property; Polymer composites; Strontium titanate
资金
- Ministry of Trade, Industry & Energy (MOTIE, Korea) [20011165]
- Competency Development Program for Industry Specialists of the Korean Ministry of Trade, Industry and Energy (MOTIE) [P0012453]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20011165] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study aims to fabricate a composite material with a high dielectric constant and suitable thermal conductivity, consisting of thermoplastic polyurethane (TPU) and carbon nanotube (CNT)-covered strontium titanate (SrTiO3). The results showed that the dielectric constants of the composites with 40% CNT-covered SrTiO3 were three times higher than the pure TPU matrix. The thermal conductivity was significantly improved by 9 times compared with the pure TPU, while the tensile strength and thermal stability were minimally affected.
Our study aims to fabricate a high dielectric constant and suitable thermal conductivity without influencing the mechanical properties of composites of thermoplastic polyurethane (TPU) with carbon nanotube (CNT)-covered strontium titanate (SrTiO3). Initially, the CNT particles were functionalized with surface treatment using aminopropyl tri-ethoxy silane (APTES) following nitric acid (HNO3) and sulfuric acid (H2SO4) treatments of CNT particles. The functionalized CNT was covered on the SrTiO3 particles through the hydrothermal reaction process. The composites of TPU and CNT-covered SrTiO3 were fabricated via melt-extrusion methods. Analysis of dielectric constant, thermal conductivity, mechanical properties, thermal degradation were performed to investigate the composites' capabilities. We found that the dielectric constants of the composites with the application of 40% CNT-covered SrTiO3 were three times (300%) the neat TPU matrix. The tensile strength was only minimally affected; the thermal degradation nature reveals that the thermal stability of the composites was maintained compared with the neat TPU. The thermal conductivity has improved significantly about 9 times (improved from 0.21 to 1.84 W/(m*K) compared with the neat TPU with the application of 40% CNT-covered SrTiO3.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据