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Preparation and Properties of Dielectric Conductive Mica/Boron Nitride Nanohybrid Polyimide Films
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Chunqi ZHANG1, Bin WU1, Jiangwei SONG2, Luru JING1, 2
Insulating Materials | 2021, 54(2) : 37 - 42
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Insulating Materials | 2021, 54(2): 37-42
• Special Issue on Thermal Conductive Insulating •
Preparation and Properties of Dielectric Conductive Mica/Boron Nitride Nanohybrid Polyimide Films
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Chunqi ZHANG1, Bin WU1, Jiangwei SONG2, Luru JING1, 2
Affiliations
  • 1Suzhou Taihu Electric Advanced Material Co., Ltd., Suzhou 215214, China
  • 2China University of Geosciences, Wuhan 430074, China
Published: 2021-02-20 doi: 10.16790/j.cnki.1009-9239.im.2021.02.007
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First of all, hexagonal boron nitride (h-BN) micro-powder and sericite micro-powder (Mica) were used as raw materials, boron nitride nanosheets (BNNSs) and mica nanosheets (MNS) were exfoliated by freeze-thaw cycle combined with ultrasonic technology. Then the BNNSs and MNS were used as insulating thermal conductive fillers, mica/boron nitride nanohybrid polyimide films (MNS/BNNS nanohybrid PI films) were prepared by in-situ polymerization and two-step water-based polyimide (PI) process. The influence of different MNS/BNNS filling amounts on the performance of PI composite films was studied. The morphology and structure of BN, BNNS, Mica, and MNS were characterized by XRD, TEM, and AFM, and the thermal conductivity, dielectric constant and electric strength of the MNS/BNNS nanohybrid PI films were measured. The results show that when the ratio between MNS and BNNSs is 1∶2, the MNS/BNNS nanohybrid PI films have better comprehensive properties, and the thermal conductivity is significantly improved compared with pure PI. The thermal conductivity is 0.743 W/(m·K), the electric strength is 246 MV/m, and the dielectric constant is 5.28.

nanocomposites  /  boron nitride  /  mica  /  polyimide  /  thermal conductivity
Chunqi ZHANG, Bin WU, Jiangwei SONG, Luru JING. Preparation and Properties of Dielectric Conductive Mica/Boron Nitride Nanohybrid Polyimide Films[J]. Insulating Materials, 2021 , 54 (2) : 37 -42 . DOI: 10.16790/j.cnki.1009-9239.im.2021.02.007
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2021.02.007
  • Receive Date：2020-06-24
  • Online Date：2026-01-26
  • Published：2021-02-20
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  • Received：2020-06-24
  • Revised：2020-12-09
Affiliations
    1Suzhou Taihu Electric Advanced Material Co., Ltd., Suzhou 215214, China
    2China University of Geosciences, Wuhan 430074, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2021.02.007
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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