Preparation and thermal-mechanical properties of physical and chemical dual-reinforced SiO2 aerogels

IF 3.5 3区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of Non-crystalline Solids Pub Date : 2025-05-15 Epub Date: 2025-03-04 DOI:10.1016/j.jnoncrysol.2025.123462
Wang Zhan , Jinhong Mo , Lingling Tang , Fan Shi , Le Chen , Lixia Li , Mingyi Chen , Qinghong Kong , Ru Zhou , Juncheng Jiang
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Abstract

Considering that the poor mechanical properties limit the application of SiO2 aerogels in fire insulation, polyurethane sponges, and mica were used to enhance the mechanical properties of SiO2 aerogels in this study. The effects of polyurethane sponges with different pore sizes and mica content on the thermal-mechanical properties of composite aerogels were investigated. The internal structure of the composite aerogels was analyzed by scanning electron microscopy. Moreover, the chemical structure and composition of the composite aerogels were characterized and analyzed. The results demonstrate that polyurethane sponges and mica can effectively enhance the mechanical properties of composite aerogels. However, the addition of mica increased the thermal conductivity. The experimental data will further expand the engineering application of SiO2 aerogels.
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物理和化学双增强SiO2气凝胶的制备及其热力学性能
考虑到SiO2气凝胶的力学性能差限制了其在防火保温材料中的应用,本研究采用聚氨酯海绵和云母来增强SiO2气凝胶的力学性能。研究了不同孔径和云母含量的聚氨酯海绵对复合气凝胶热力学性能的影响。利用扫描电镜对复合气凝胶的内部结构进行了分析。并对复合气凝胶的化学结构和组成进行了表征和分析。结果表明,聚氨酯海绵和云母能有效提高复合气凝胶的力学性能。然而,云母的加入增加了导热系数。实验数据将进一步拓展SiO2气凝胶的工程应用。
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阿拉丁
trimethylchlorosilane
阿拉丁
Ammonia liquor
来源期刊
Journal of Non-crystalline Solids
Journal of Non-crystalline Solids 工程技术-材料科学:硅酸盐
CiteScore
6.50
自引率
11.40%
发文量
576
审稿时长
35 days
期刊介绍: The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.
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