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<p>Coupling superior thermal insulation performance with high transparency for solar transmission and excellent processability in aerogels is a challenging yet promising subject. Here, we report a direct ink writing strategy to create transparent polymethylsilsesquioxane (PMSQ) aerogels from gel inks with desired rheology, by merely using acid-base dual modulators to achieve “activation–retardation” of polycondensation reaction. The printed aerogels are pure PMSQ, have a transmittance of 97% in the visible-near infrared range, thermal conductivity (16.2 mW m<sup>−1</sup> K<sup>−1</sup>) lower than that of still air, and low density (0.08 g cm<sup>−3</sup>). We demonstrate new possibilities of our 3D-printed transparent aerogels, such as device encapsulation for heat insulation and cylindrical cooling shields for lighting.</p>

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Activation–retardation in sol–gel reactions for additive manufacturing of transparent poly(methylsilsesquioxane) aerogels

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月2日

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  • Mengyue Gao,
  • Junyan Zhang,
  • Chengjian Xu,
  • Xiaoxiao Yu,
  • Linfeng Chen,
  • Junjie Zheng,
  • Weiwei Zuo,
  • Xinhai Zhang,
  • Yanhua Cheng,
  • Meifang Zhu

摘要

Coupling superior thermal insulation performance with high transparency for solar transmission and excellent processability in aerogels is a challenging yet promising subject. Here, we report a direct ink writing strategy to create transparent polymethylsilsesquioxane (PMSQ) aerogels from gel inks with desired rheology, by merely using acid-base dual modulators to achieve “activation–retardation” of polycondensation reaction. The printed aerogels are pure PMSQ, have a transmittance of 97% in the visible-near infrared range, thermal conductivity (16.2 mW m−1 K−1) lower than that of still air, and low density (0.08 g cm−3). We demonstrate new possibilities of our 3D-printed transparent aerogels, such as device encapsulation for heat insulation and cylindrical cooling shields for lighting.