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Temperature-Responsive Intumescent Chemistry toward Fire Resistance and Super Thermal Insulation under Extremely Harsh Conditions
Chemistry of Materials ( IF 7.2 ) Pub Date : 2021-07-08 , DOI: 10.1021/acs.chemmater.1c01408
Ting Wang 1 , Man-Cheng Long 1 , Hai-Bo Zhao 1 , Wen-Li An 1 , Shimei Xu 1 , Cong Deng 1 , Yu-Zhong Wang 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2021-07-08 , DOI: 10.1021/acs.chemmater.1c01408
Ting Wang 1 , Man-Cheng Long 1 , Hai-Bo Zhao 1 , Wen-Li An 1 , Shimei Xu 1 , Cong Deng 1 , Yu-Zhong Wang 1
Affiliation
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Organic aerogels with high strength are attractive for thermal insulators but are seriously hampered under fire/high-temperature harsh conditions. In this study, we report a smart temperature-responsive self-intumescent strategy for organic aerogels driven by in situ carbonization and self-foaming chemistry. The resultant smart temperature-responsive aerogel is not active at low temperatures but can intumesce rapidly to form stable porous carbon at higher temperatures (>300 °C) to achieve excellent fire resistance and high-temperature thermal insulation. Especially, the aerogel can smartly real-time expand with different contents in response to temperature/fire to form different porous carbon layers, thus resisting the attack of various heat conditions and exhibiting the best high-temperature insulating performance ever reported. The corresponding mechanism has been revealed in detail. This aerogel also exhibits the combined advantages of a high compressive modulus of 45 MPa, negligible heat and smoke release during fire, and low thermal conductivity. This novel strategy provides new insights for the development of advanced extreme-condition insulating organic insulators.
中文翻译：
在极端恶劣条件下实现耐火和超级隔热的温度响应膨胀化学
具有高强度的有机气凝胶对热绝缘体很有吸引力，但在火灾/高温恶劣条件下受到严重阻碍。在这项研究中，我们报告了一种由原位碳化和自发泡化学驱动的有机气凝胶的智能温度响应自膨胀策略。由此产生的智能温度响应气凝胶在低温下没有活性，但可以在较高温度（>300°C）下迅速膨胀形成稳定的多孔碳，从而实现优异的耐火性和高温隔热性。特别是，气凝胶可以响应温度/火，智能地实时膨胀不同含量的多孔碳层，形成不同的多孔碳层，从而抵抗各种热条件的侵袭，并表现出迄今为止报道的最佳高温绝缘性能。已经详细揭示了相应的机制。这种气凝胶还具有 45 MPa 的高压缩模量、火灾期间可忽略不计的热量和烟雾释放以及低导热性的综合优势。这种新颖的策略为开发先进的极端条件绝缘有机绝缘体提供了新的见解。
更新日期：2021-08-10
中文翻译：
在极端恶劣条件下实现耐火和超级隔热的温度响应膨胀化学
具有高强度的有机气凝胶对热绝缘体很有吸引力，但在火灾/高温恶劣条件下受到严重阻碍。在这项研究中，我们报告了一种由原位碳化和自发泡化学驱动的有机气凝胶的智能温度响应自膨胀策略。由此产生的智能温度响应气凝胶在低温下没有活性，但可以在较高温度（>300°C）下迅速膨胀形成稳定的多孔碳，从而实现优异的耐火性和高温隔热性。特别是，气凝胶可以响应温度/火，智能地实时膨胀不同含量的多孔碳层，形成不同的多孔碳层，从而抵抗各种热条件的侵袭，并表现出迄今为止报道的最佳高温绝缘性能。已经详细揭示了相应的机制。这种气凝胶还具有 45 MPa 的高压缩模量、火灾期间可忽略不计的热量和烟雾释放以及低导热性的综合优势。这种新颖的策略为开发先进的极端条件绝缘有机绝缘体提供了新的见解。
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