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Research on Insulating Performance and Dielectric Properties of Montmorillonite/Polyimide Fiber Paper-based Material
Received:April 14, 2023  
DOI：10.11980/j.issn.0254-508X.2023.11.002
Key Words:polyimide fiber  insulating paper  montmorillonite  dielectric properties
Fund Project:国家自然科学基金项目（22178211）；国家级大学生创新创业训练计划资助项目（202210708005）；陕西省技术创新引导专项（2023GXLH-077）；陕西省重点研发计划项目（2021ZDLGY14-05）；西安市科技计划项目（2019220114SYS016CG038）；浙江省重点研发计划项目（2019C04008）；浙江省“尖兵”“领雁”研发攻关计划（2022C01066）。
Author NameAffiliationPostcode
XU Mingyuan* College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
JIA Fengfeng College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LIU Yuanqing College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
GUO Zizhan College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
WANG Ruanyu College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
SHA Lizheng School of Environmental and Natural Resource， Zhejiang University of Science & Technology， Hangzhou， Zhejiang Province， 310023 310023
LU Zhaoqing College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:In this study， the effects of paper basis weight and montmorillonite content on the physical performances and dielectric properties of polyimide fiber paper-based materials were investigated by monofactor analysis method. The results showed that there was no significant difference in the appearance of polyimide fiber paper-based materials with different paper basis weight. When the paper basis weight was 80 g/m2， the polyimide fiber paper-based materials had the optimal physical performances， with the tensile index and tear index reaching 15.0 N·m/g and 19.7 mN·m2/g， respectively. When the dosage of montmorillonite was 6%， the volume resistivity of montmorillonite/polyimide fiber paper-based material achieved the highest value， reaching 2.59×1015 Ω·m. When the dosage of montmorillonite reached 8%， the montmorillonite/polyimide fiber paper-based material possessed the best insulation performance， the puncture intensity with working frequency reached 17.34 kV/mm， and the relative permittivity and dielectric loss reached 4.99 and 0.23， respectively， at the frequency of 50 Hz.
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