Extreme environment-bearable polyimide film with a three-dimensional Ag microfiber conductive network for ultrahigh electromagnetic interference shielding
Source abstract
Abstract
聚合物基电磁屏蔽材料可以保证电子设备的正常运行以及保护 人体免受电磁辐射的伤害, 因而在电子通信领域得到了广泛的发展. 然 而, 制备在恶劣环境中(例如: 太空中的极高温和极低温环境)仍具有超 高电磁屏蔽效率(EMI SE)、低厚度、高耐用性和柔性的电磁屏蔽复合 材料仍然是一个挑战. 在本研究中, 我们通过气流纺丝和压缩成型相结 合的方法, 构建了一种银微米纤维海绵(AgMS)/聚酰亚胺(PI)电磁屏蔽 膜. 在AgMS/PI薄膜厚度仅为20 μm时, 由28 vol% AgMS构成的三维导 电网络使其具有极高的导电性(4.5 × 106 S m−1)和高达90.6 dB的电磁屏 蔽效率. 该薄膜在−196和250°C条件下持续120 h, 均能保持良好的电磁 屏蔽性能, 且电磁屏蔽效率均保持在85.1 dB以上. 此外, AgMS/PI薄膜 还表现出出色的热管理性能, 比如在极低的供电电压(1.1 V)下实现 200.2 °C的高饱和温度, 快速的响应时间(3.1 s), 优秀的循环加热稳定 性和出色的可靠性. 这些优异的性能表明AgMS/PI薄膜在恶劣环境下 的电子通讯领域和人工智能领域具有巨大的应用潜力.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Dielectric materials and actuators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
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