常压干燥多功能硅胶/MXene复合气凝胶，用于智能防火

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-06-10 DOI:10.1016/j.compositesa.2025.109106

Wenhong Jiang , Yinan Zhao , Weiguo Wang , Qingtao Zeng , Hongqiang Li , Xingrong Zeng , Xuejun Lai

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引用次数: 0

摘要

有机硅气凝胶是目前最受关注的轻质保温材料之一，但其制备工艺复杂、易燃性差。本文以TA改性的MXene分散体和聚二甲基硅氧烷为原料，通过常压干燥和浸渍法制备了一种新型多功能有机硅/MXene复合气凝胶（MTSAP）。MTSAP具有重量轻、机械回弹性好等特点。更重要的是，它具有灵敏的火灾报警能力和优异的阻燃性。由于MXene特有的热电响应特性，MTSAP的Seebeck系数达到6.4 μV·K-1，线性拟合良好。它在燃烧后0.8秒内触发了早期火灾预警系统。MTSAP的极限氧指数超过28.0%。离火后表现出快速的自熄行为，放热速率和放热总量显著降低。此外，MTSAP还具有持久的压阻传感、隔热和超疏水性。本研究为高防火安全性多功能有机硅复合气凝胶的制备和应用提供了新的前景。

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Ambient-pressure dried multifunctional silicone/MXene composite aerogel for smart fire protection

Silicone aerogel is one of the most noteworthy lightweight materials for thermal insulation, but it still faces the challenges of flammability and complicated preparation process. In this work, a novel multifunctional silicone/MXene composite aerogel (MTSAP) was prepared via ambient-pressure drying and dip-coating with TA modified MXene dispersion and polydimethylsiloxane. MTSAP exhibited light weight and excellent mechanical resilience. More importantly, it showed sensitive fire-warning capability and splendid flame retardancy. Thanks to the unique thermoelectric response characteristic of MXene, the Seebeck coefficient of MTSAP reached 6.4 μV·K-1 with good linear fitting. It triggered the early fire warning system within 0.8 s upon being burned. The limiting oxygen index of MTSAP exceeded 28.0 %. Additionally, it exhibited a rapid self-extinguish behavior after being removed from fire, its heat release rate and total heat release considerably decreased. Besides, MTSAP showed durable piezoresistive sensing, thermal insulation and superhydrophobicity. This work provides novel perspectives for the preparation and application of high fire-safety multifunctional silicone composite aerogels.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.