Rigid/flexible molecular structure-induced polyimide aerogels with ultralow permittivity and thermal insulation properties

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2022-12-19 DOI:10.1049/nde2.12041
Xiaodi Dong, Baoquan Wan, Lin Qiu, Ming-Sheng Zheng, Jiefeng Gao, Jun-Wei Zha
{"title":"Rigid/flexible molecular structure-induced polyimide aerogels with ultralow permittivity and thermal insulation properties","authors":"Xiaodi Dong,&nbsp;Baoquan Wan,&nbsp;Lin Qiu,&nbsp;Ming-Sheng Zheng,&nbsp;Jiefeng Gao,&nbsp;Jun-Wei Zha","doi":"10.1049/nde2.12041","DOIUrl":null,"url":null,"abstract":"<p>A series of high-performance linear and cross-linked polyimide (PI) aerogels with different molecular structures have been successfully synthesised using the freeze-drying process. In this study, the comprehensive regulation of microstructure, thermodynamic, thermal insulation and dielectric properties of PI aerogels are achieved by controlling the rigid/flexible structure and composition of polymerised monomers. The increase in rigidity of PI molecular structure could promote the formation of denser pores, which is beneficial to improve the thermodynamic and thermal insulation properties of aerogels. Notably, the cross-linked PI aerogel prepared by introducing cross-linking agent (tris(4-aminophenyl) amine, [TPA]) into linear PI exhibits high thermal stability (<i>T</i><sub><i>d</i>5%</sub> &gt; 560°C), excellent ultralow permittivity (<i>ε</i><sub><i>r</i></sub> = 1.31, <i>f</i> = 10<sup>6</sup> Hz) and good thermal insulation property (<i>k</i> = 0.056 W/m · K). This innovative strategy promotes the wider application of the cross-linked polyimide aerogel in the field of integrated circuits and aerospace exploration.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12041","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IET Nanodielectrics","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/nde2.12041","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 2

Abstract

A series of high-performance linear and cross-linked polyimide (PI) aerogels with different molecular structures have been successfully synthesised using the freeze-drying process. In this study, the comprehensive regulation of microstructure, thermodynamic, thermal insulation and dielectric properties of PI aerogels are achieved by controlling the rigid/flexible structure and composition of polymerised monomers. The increase in rigidity of PI molecular structure could promote the formation of denser pores, which is beneficial to improve the thermodynamic and thermal insulation properties of aerogels. Notably, the cross-linked PI aerogel prepared by introducing cross-linking agent (tris(4-aminophenyl) amine, [TPA]) into linear PI exhibits high thermal stability (Td5% > 560°C), excellent ultralow permittivity (εr = 1.31, f = 106 Hz) and good thermal insulation property (k = 0.056 W/m · K). This innovative strategy promotes the wider application of the cross-linked polyimide aerogel in the field of integrated circuits and aerospace exploration.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
具有超低介电常数和隔热性能的刚性/柔性分子结构诱导聚酰亚胺气凝胶
利用冷冻干燥技术成功合成了一系列具有不同分子结构的高性能线性和交联聚酰亚胺(PI)气凝胶。在本研究中,通过控制聚合单体的刚性/柔性结构和组成,实现了PI气凝胶的微观结构、热力学、隔热和介电性能的综合调控。PI分子结构刚度的提高可以促进致密孔隙的形成,有利于提高气凝胶的热力学和保温性能。值得注意的是,在线性PI中引入交联剂(三(4-氨基苯基)胺,[TPA])制备的交联PI气凝胶具有很高的热稳定性(Td5% >优异的超低介电常数(εr = 1.31, f = 106 Hz)和良好的保温性能(k = 0.056 W/m·k),这一创新策略促进了交联聚酰亚胺气凝胶在集成电路和航天探索领域的更广泛应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
期刊最新文献
A combined technique for power transformer fault diagnosis based on k-means clustering and support vector machine Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity High‐performance sulphur dioxide sensor: Unveiling the potential of photonic crystal fibre technology Improvement in non-linear electrical conductivity of silicone rubber by incorporating zinc oxide fillers and grafting small polar molecules Traditional fault diagnosis methods for mineral oil-immersed power transformer based on dissolved gas analysis: Past, present and future
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1