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Review on low-dielectric and low-loss organic materials based on long-chain alkyl inductive effect
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Zichen SHI, Rongrui SHI, Zongao DOU, Xi′ao YAN, Yinquan LIU, Nanyang LIN, Jing SUN*, Qiang FANG*
Insulating Materials | 2026, 59(6) : 25 - 33
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Insulating Materials | 2026, 59(6): 25-33
Review on low-dielectric and low-loss organic materials based on long-chain alkyl inductive effect
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Zichen SHI, Rongrui SHI, Zongao DOU, Xi′ao YAN, Yinquan LIU, Nanyang LIN, Jing SUN*, Qiang FANG*
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  • Shanghai Institute of Organic Chemistry, Shanghai 200032, China
Published: 2026-06-20 doi: 10.16790/j.cnki.1009-9239.im.2026.06.003
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The rapid development of 5G/6G high-frequency communication technology has placed unprecedented demands on dielectric materials: they require an extremely low dielectric constant (Dk<2.8) and dielectric loss (Df<10-3). Moreover, new low-dielectric materials must possess excellent hydrophobicity to ensure the long-term stability of their dielectric properties. The intrinsic dielectric properties of traditional materials struggle to meet these requirements, while post-modification strategies like pore generation often sacrifice mechanical performance. This paper systematically discussed a novel design strategy for dielectric materials based on the “long alkyl chain-induced effect”, elaborated the synergistic mechanism of reducing the dielectric constant and loss through free volume effects, polarity control, and trap mechanisms, and emphatically introduced successful implementation in three major polymer systems: fluorene-based polymers, alkylphenyl polymers, and bio-based cardanol polymers. In view of the excellent hydrophobic performance of the as-designed materials, this paper also discussed their potential in ensuring the long-term stability of dielectric properties. Finally, the future development trends and existing challenges in this research field were prospected.

non-fluorinated alkyl low-dielectric materials  /  long alkyl chains  /  oxygen-free dielectric materials  /  high-frequency communications  /  benzocyclobutene
Zichen SHI, Rongrui SHI, Zongao DOU, Xi′ao YAN, Yinquan LIU, Nanyang LIN, Jing SUN, Qiang FANG. Review on low-dielectric and low-loss organic materials based on long-chain alkyl inductive effect[J]. Insulating Materials, 2026 , 59 (6) : 25 -33 . DOI: 10.16790/j.cnki.1009-9239.im.2026.06.003
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doi: 10.16790/j.cnki.1009-9239.im.2026.06.003
  • Receive Date：2025-10-20
  • Online Date：2026-09-10
  • Published：2026-06-20
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  • Received：2025-10-20
  • Revised：2025-12-23
Affiliations
    Shanghai Institute of Organic Chemistry, Shanghai 200032, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2026.06.003
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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
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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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