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Grafting technology and high temperature energy storage characteristics of polypropylene film by melt grafting
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Junluo LI1, Li MENG1, Yuhang LIU1, Bing LUO2, Yongsheng XU2, Wei XIAO2, Jinliang HE1, Qi LI1
Insulating Materials | 2025, 58(4) : 1 - 8
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Insulating Materials | 2025, 58(4): 1-8
• Advanced Energy Storage Dielectric Special Issue •
Grafting technology and high temperature energy storage characteristics of polypropylene film by melt grafting
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Junluo LI1, Li MENG1, Yuhang LIU1, Bing LUO2, Yongsheng XU2, Wei XIAO2, Jinliang HE1, Qi LI1
Affiliations
  • 1 State Key Laboratory of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
  • 2 National Engineering Research Center of UHV Technology and New Electrical Equipment, Guangzhou 510080, China
Published: 2025-04-20 doi: 10.16790/j.cnki.1009-9239.im.2025.04.001
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Aiming at the problem that the energy storage characteristics of polypropylene (PP) capacitor films reduce greatly under high temperature and high electric field, the polypropylene was modified by melt grafting with maleic anhydride (MAH) at the molecular level, and the effects of grafting monomer content, initiator mass fraction, and reaction temperature on the high-temperature energy storage characteristics of the films were investigated. Then a maleic anhydride grafted polypropylene (PP-g-MAH) biaxially oriented capacitor film with superior high-temperature energy storage characteristics was prepared, and its structure and performances were characterized and tested. The results show that with the increase of monomer content, initiator mass fraction, and reaction temperature, the charge and discharge efficiency of the grafted sample increases at first and then decreases. The graft modification promotes the increase of crystal nuclei and the reduce of spherulite size in PP, which increases the trap depth and trap density of the film effectively, reduces the carrier mobility, and enhances the electric strength and energy storage characteristics at high temperature.

maleic anhydride  /  biaxially oriented polypropylene  /  melt grafting  /  high temperature energy storage
Junluo LI, Li MENG, Yuhang LIU, Bing LUO, Yongsheng XU, Wei XIAO, Jinliang HE, Qi LI. Grafting technology and high temperature energy storage characteristics of polypropylene film by melt grafting[J]. Insulating Materials, 2025 , 58 (4) : 1 -8 . DOI: 10.16790/j.cnki.1009-9239.im.2025.04.001
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2025.04.001
  • Receive Date：2024-05-27
  • Online Date：2025-11-07
  • Published：2025-04-20
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  • Received：2024-05-27
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    1 State Key Laboratory of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
    2 National Engineering Research Center of UHV Technology and New Electrical Equipment, Guangzhou 510080, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2025.04.001
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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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