Concrete-inspired closet packing designed Al-doped silica aerogel coatings for fireproof and thermal insulation protection

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-08-26 DOI:10.1016/j.compositesb.2025.112971

Yuming Zhang , Wenjian Lin , Cong Li , Xianzhang Dong

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引用次数: 0

Abstract

Modern civil and industrial fire protection applications demand increasingly rigorous performance standards for thermal insulation materials. While aerogel-based coatings have emerged as promising candidates in recent years, their effectiveness remains constrained by limited aerogel loading capacities, which fundamentally restricts their thermal insulation performance. Here, we fabricate an Al-doped silica aerogel coating inspired by the closet packing design of concrete. The result coatings’ aerogel content could up to 95 %–98 %, which is far beyond the present reported works. Besides, the coating showed ultra-lightweight property (263.36 ± 4.56 mg/cm³), outstanding thermal insulation performance (29.75 mW m⁻¹ K⁻¹ at 25 °C, 168.97 mW m⁻¹ K⁻¹ at 1000 °C), and could work at 800 °C for long-term with backside temperature 258 °C (4 mm thickness). Meanwhile, the result coating showed super fire retardant compared to commercial aerogel coating and fire intumescent coating. This large aerogel content coating with excellent fireproof performance can perfectly match the advanced fire protection requirements, and provide an idea for improving thermal insulation performance of coatings.

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以混凝土为灵感的壁橱包装设计了掺铝二氧化硅气凝胶涂层，用于防火和隔热保护

现代民用和工业消防应用对保温材料的性能要求越来越严格。虽然近年来气凝胶基涂料已经成为有前途的候选材料，但它们的有效性仍然受到气凝胶负载能力的限制，这从根本上限制了它们的隔热性能。在这里，我们制作了一种掺铝二氧化硅气凝胶涂层，灵感来自于混凝土的壁橱包装设计。结果表明，该涂料的气凝胶含量可达95% ~ 98%，远远超过了现有的研究成果。此外，该涂层具有超轻性能（263.36±4.56 mg/cm3），优异的保温性能（25℃时29.75 mW m−1 K−1,1000℃时168.97 mW m−1 K−1），可在800℃下长期工作，背面温度258℃（4 mm厚度）。同时，与市售气凝胶涂料和防火膨胀涂料相比，该涂料表现出超强的阻燃性。这种大气凝胶含量的涂料具有优异的防火性能，完全符合先进的防火要求，为提高涂料的保温性能提供了思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.