Ultra-stable graphene aerogels for electromagnetic interference shielding
Source abstract
Abstract
石墨烯气凝胶(GAs)在解决下一代电子器件电磁屏蔽污染方面引起了广泛关注. 但是, 由于超轻石墨烯气凝胶在复杂环境中结构不稳定, 其在电磁屏蔽的实际应用中仍面临巨大的挑战. 在此, 我们提出一类机械结构稳定的石墨烯气凝胶, 其展示出优异可靠的电磁屏蔽性能. 这类气凝胶呈现出面面堆叠的结构, 在密度ρ = 3.7 mg cm−3, 高度1 mm时, 电磁屏蔽效能可达到64.1 dB, 比电磁屏蔽效能达到173,243 dB cm2 g−1, 远超现有报道的碳基材料. 同时, 石墨烯气凝胶具有优异的环境适应性, 在机械形变、 极端温度、 燃烧及水下等环境中均可保持性能稳定. 此外, 制备的石墨烯气凝胶可通过真空袋装工艺进行包装运输, 解决了超轻材料实际应用中低密度与大体积的矛盾, 且在这一极端变形过程中材料结构和性能均未产生破坏. 该研究为石墨烯气凝胶电磁屏蔽材料的实际应用铺平了道路, 且拓展了其实际应用场景, 比如航天、军事战机及海洋领域.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Metamaterials and Metasurfaces Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
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