自己潤滑性ナノファイバー/中空マイクロ球体オールセラミックアーキテクチャによる堅牢な柔軟性熱断熱材
Kehan Qu1,2,3, Yujie You1,2, Qiangyu Xue1
1School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 7, 2026
まとめ
本研究では、優れた熱断熱性を持つシリカナノファイバーと中空マイクロ球体を使用した柔軟な無機膜を紹介する。リチウム電池の安全性のような用途に理想的な、優れた耐久性と極端な温度に対する保護を提供する。
科学分野:
- 材料科学
- ナノテクノロジー
- 熱工学
背景:
- 極端な環境のための、高い熱安定性と低い熱伝導率を持つ柔軟な熱断熱材の開発は非常に重要である。
- 既存の材料は、機械的柔軟性または熱性能のいずれかを犠牲にすることが多い。
研究 の 目的:
- 高度な熱保護のための新しい無機柔軟膜を作成すること。
- 優れた特性のために、シリカナノファイバー(SNF)内に中空シリカマイクロ球体(HSM)を埋め込むこと。
主な方法:
- 容易なエレクトロスピニング技術を用いた複合膜の作製。
- 3次元自己潤滑性アーキテクチャを作成するために、SNF足場にHSMを統合すること。
主要な成果:
- 膜は、並外れた機械的耐久性(100,000回以上の曲げサイクル、72時間の振動)を示した。
- 超低熱伝導率(31.39 mW m⁻¹ K⁻¹)と高い空気の流れ抵抗を達成した。
- 1100°Cまでの優れた耐熱性と、熱衝撃耐性(-196°Cから1300°C)を実証した。
- 厚さ5mmの膜は、700°Cの炎試験中に約160°Cの後面温度を維持した。
結論:
- SNF/HSM複合膜は、高性能で柔軟な熱保護のための画期的な設計を提供する。
- この材料は、リチウム電池の熱暴走のような過渡的な熱の極端に対する解決策を大幅に進歩させる。
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