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Photothermal-healing, and record thermal stability and fire safety black phosphorus–boron hybrid nanocomposites: mechanism of phosphorus fixation effects and charring inspired by cell walls
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-06-07 , DOI: 10.1039/d2ta02430f Bin Zou 1 , Shuilai Qiu 1 , Yifan Zhou 1 , Ziyan Qian 1 , Zhoumei Xu 1 , Jingwen Wang 1 , Yuling Xiao 1 , Can Liao 1 , Wenhao Yang 1 , Longfei Han 1 , Fukai Chu 1 , Lei Song 1 , Zhou Gui 1 , Yuan Hu 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-06-07 , DOI: 10.1039/d2ta02430f Bin Zou 1 , Shuilai Qiu 1 , Yifan Zhou 1 , Ziyan Qian 1 , Zhoumei Xu 1 , Jingwen Wang 1 , Yuling Xiao 1 , Can Liao 1 , Wenhao Yang 1 , Longfei Han 1 , Fukai Chu 1 , Lei Song 1 , Zhou Gui 1 , Yuan Hu 1
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Inspired by the structure and good thermal resistance of cell walls in plants, we herein develop a life-cycle safe multifunctional nanocomposite of a polycarbonate/black phosphorus–boron nanohybrid (PC/BP–B) with properties of photothermal-healing, thermal stability and fire safety. In the first place, the photothermal conversion capability of PC/BP–B1.0, evidently increases with the irradiation power (r2 > 0.994), which indicates a 99.28% recovery of tensile strength. Secondly, by studying the chemical responses of BP to heat, we find that PC/BP–B exhibits self-assembly behavior driven by fire where BPO4 serves as a node inspired by the cell wall. This unique structure can not only bridge carbonate groups and fix phosphorus compounds, but also capture pyrolysis products and catalyze charring. It helps PC/BP–B1.0 achieve better thermal stability and fire safety with a 57.16 °C increase in T−1% and a 70.50% decrease in the heat release rate. Furthermore, the pyrolysis products of polycarbonate-based polymers and black phosphorus-based hybrids (CO2 and P4, P3, and P2) in the gas phase are also analyzed in this research. Finally, PC/BP–B1.0 can fully keep phosphorus in the condensed phase, which provides a nature-inspired strategy for reducing the release of phosphorus compounds during pyrolysis that may be detrimental to human health and the ecological environment. This work paves a general path for the design and application of nanocomposites with superior properties of crack healing, thermal stability and fire safety.
中文翻译：
光热修复、创纪录的热稳定性和防火黑磷-硼杂化纳米复合材料：受细胞壁启发的磷固定效应和炭化机制
受植物细胞壁结构和良好耐热性的启发，我们开发了一种具有光热修复、热稳定性和消防安全。首先，PC/BP-B 1.0的光热转换能力随着辐照功率的增加而明显增加（r 2 > 0.994），这表明抗拉强度恢复了99.28%。其次，通过研究 BP 对热的化学反应，我们发现 PC/BP-B 表现出由火驱动的自组装行为，其中 BPO 4作为受细胞壁启发的节点。这种独特的结构不仅可以桥接碳酸酯基团和固定磷化合物，还可以捕获热解产物并催化炭化。它有助于 PC/BP-B 1.0实现更好的热稳定性和防火安全性，T -1%提高 57.16 °C ，放热率降低 70.50%。此外，本研究还分析了基于聚碳酸酯的聚合物和基于黑磷的杂化物（CO 2和 P 4、P 3和 P 2）在气相中的热解产物。最后，PC/BP-B 1.0可以将磷完全保持在凝聚态，这为减少热解过程中可能对人体健康和生态环境有害的磷化合物的释放提供了一种受自然启发的策略。这项工作为纳米复合材料的设计和应用铺平了道路，该复合材料具有优异的裂纹愈合、热稳定性和防火安全性。
更新日期：2022-06-07
中文翻译：
光热修复、创纪录的热稳定性和防火黑磷-硼杂化纳米复合材料：受细胞壁启发的磷固定效应和炭化机制
受植物细胞壁结构和良好耐热性的启发，我们开发了一种具有光热修复、热稳定性和消防安全。首先，PC/BP-B 1.0的光热转换能力随着辐照功率的增加而明显增加（r 2 > 0.994），这表明抗拉强度恢复了99.28%。其次，通过研究 BP 对热的化学反应，我们发现 PC/BP-B 表现出由火驱动的自组装行为，其中 BPO 4作为受细胞壁启发的节点。这种独特的结构不仅可以桥接碳酸酯基团和固定磷化合物，还可以捕获热解产物并催化炭化。它有助于 PC/BP-B 1.0实现更好的热稳定性和防火安全性，T -1%提高 57.16 °C ，放热率降低 70.50%。此外，本研究还分析了基于聚碳酸酯的聚合物和基于黑磷的杂化物（CO 2和 P 4、P 3和 P 2）在气相中的热解产物。最后，PC/BP-B 1.0可以将磷完全保持在凝聚态，这为减少热解过程中可能对人体健康和生态环境有害的磷化合物的释放提供了一种受自然启发的策略。这项工作为纳米复合材料的设计和应用铺平了道路，该复合材料具有优异的裂纹愈合、热稳定性和防火安全性。
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