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Research on preparation and properties of modified boron nitride/aramid nanofiber composite films
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Zhen GU1, Yu LU2, Lei ZHOU1, Jingyue ZHANG1, Yun LI2
Insulating Materials | 2024, 57(12) : 20 - 26
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Insulating Materials | 2024, 57(12): 20-26
• Material Research •
Research on preparation and properties of modified boron nitride/aramid nanofiber composite films
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Zhen GU1, Yu LU2, Lei ZHOU1, Jingyue ZHANG1, Yun LI2
Affiliations
  • 1State Grid Shanghai Electric Power Company, Shanghai 200051, China
  • 2Shenzhen Clou Electronics Co., Ltd., Shenzhen 518132, China
Published: 2024-12-20 doi: 10.16790/j.cnki.1009-9239.im.2024.12.003
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With the rapid development of modern electrical equipment, higher requirements have been put forward for nanocomposite films with higher dielectric strength and mechanical properties. Therefore, we modified boron nitride nanosheets (BNN) with 3-aminopropyltrihydroxysilane to obtain modified BNN (aBNN), and then mixed aBNN with aramid nanofiber (ANF) to prepare dense ANF/aBNN nanocomposite films by high-temperature hot-pressing method. The thermal stability, mechanical properties and electrical insulating properties of films were characterized. The results show that with the increase of aBNN content, the thermal weight loss rate of the nanocomposite film decreases significantly. When the mass fraction of aBNN is 10%, the tensile strength, elongation at break, and toughness of the ANF/10%aBNN nanocomposite film reach the maximum value, which is 235 MPa, 14.0%, and 32.4 MPa·m1/2, respectively, it is 25%, 9.4%, and 75.1% higher than that of ANF/10%BNN, respectively. The electrical strength of ANF/10%aBNN is as high as 154 kV/mm, which is about 15% and 11.6% higher than that of pure ANF and ANF/10%BNN, respectively. And the volume resistivity reaches the maximum value of 7.94×1017 Ω·cm (tested at 60℃), which is 893% and 694% higher than that of pure ANF and ANF/10%BNN, respectively.

modified boron nitride  /  aramid nanofibers  /  composite film  /  mechanical properties  /  electrical performance
Zhen GU, Yu LU, Lei ZHOU, Jingyue ZHANG, Yun LI. Research on preparation and properties of modified boron nitride/aramid nanofiber composite films[J]. Insulating Materials, 2024 , 57 (12) : 20 -26 . DOI: 10.16790/j.cnki.1009-9239.im.2024.12.003
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Year 2024 volume 57 Issue 12
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.12.003
  • Receive Date：2024-03-21
  • Online Date：2025-12-24
  • Published：2024-12-20
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  • Received：2024-03-21
  • Revised：2024-06-12
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    1State Grid Shanghai Electric Power Company, Shanghai 200051, China
    2Shenzhen Clou Electronics Co., Ltd., Shenzhen 518132, China
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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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