叶片仿生气凝胶用于极端环境下的隔热

IF 13 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Small Pub Date : 2025-06-03 DOI:10.1002/smll.202501682
Huawei Zhuo, Qin Li, Xueli Mei, Yaoyao Chen, Yu Liu, Hongtao Xie, Yizhao Li, Fan Dong, Lizong Dai
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引用次数: 0

摘要

气凝胶在极端环境下的热保护和建筑领域的节能方面有着广阔的前景。然而,开发具有轻质、阻燃和隔热性能的气凝胶是一个巨大的挑战。本文以天然叶片结构为灵感,成功合成了二氧化硅/壳聚糖/氧化锆纤维复合气凝胶(SCZs)。所获得的SCZs具有模仿叶子表皮、叶肉和叶脉的仿生设计。仿生结构使scz具有低密度、机械坚固性、高温尺寸稳定性和低导热性。这些特性是通过有效地阻止热传递和防止局部应力下的结构崩溃来实现的。此外,组分之间的协同作用赋予气凝胶额外的性能,包括阻燃、辐射冷却、疏水性等。本研究不仅展示了在极端环境下具有隔热和阻燃性能的多功能气凝胶,而且提出了一种简单、可持续、低成本的仿生气凝胶制备策略。这些进展为热防护和节能的应用提供了坚实的基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Leaf-Inspired Biomimetic Aerogels for Thermal Insulation in Extreme Environments

Leaf-Inspired Biomimetic Aerogels for Thermal Insulation in Extreme Environments
Aerogels hold promise for thermal protection in extreme environments and energy conservation in the building field. However, it is a great challenge to develop aerogels that possess lightweight, flame-retardant, and thermal insulation properties. Herein, inspired by the natural leaf structure, are successfully synthesized silica/chitosan/zirconia fiber composite aerogels (SCZs). The obtained SCZs feature a biomimetic design that mimics the epidermis, mesophyll, and veins of leaves. The bionic structure endows SCZs with low density, mechanical robustness, high-temperature dimensional stability, and low thermal conductivity. These properties are achieved by effectively impeding heat transfer and preventing structural collapse under localized stress. Moreover, the synergistic interactions among the components give the aerogels additional properties, including flame retardancy, radiative cooling, hydrophobicity, and so forth. This study not only presents versatile aerogels with thermal insulation and flame-retardant properties under extreme environments, but also proposes a simple, sustainable, and low-cost strategy for the preparation of biomimetic aerogels. The advancements provide a solid foundation for applications in thermal protection and energy saving.
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来源期刊
Small
Small 工程技术-材料科学:综合
CiteScore
17.70
自引率
3.80%
发文量
1830
审稿时长
2.1 months
期刊介绍: Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.
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