School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China.
The Center of Functional Materials for Working Fluids of Oil and Gas Field, Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and Application, Southwest Petroleum University, Chengdu 610500, China.
Int J Mol Sci. 2023 Feb 21;24(5):4314. doi: 10.3390/ijms24054314.
Bisphenol A type benzoxazine (Ba) monomers and 10-(2, 5-dihydroxyphenyl)-10- hydrogen-9- oxygen-10- phosphine-10- oxide (DOPO-HQ) were employed to prepare flame retardant and heat insulated polybenzoxazine (PBa) composite aerogels. The successful preparation of PBa composite aerogels was confirmed by Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The thermal degradation behavior and flame-retardant properties of the pristine PBa and PBa composite aerogels were investigated with thermogravimetric analysis (TGA) and cone calorimeter. The initial decomposition temperature of PBa decreased slightly after incorporating DOPO-HQ, increasing the char residue amount. The incorporation of 5% DOPO-HQ into PBa led to a decrease of 33.1% at the peak of the heat-release rate and a decrease of 58.7% in the TSP. The flame-retardant mechanism of PBa composite aerogels was investigated by SEM, Raman spectroscopy, and TGA coupled with infrared spectrometry (TG-FTIR). The aerogel has advantages such as a simple synthesis procedure, easy amplification, lightweight, low thermal conductivity, and good flame retardancy.
双酚 A 型苯并恶嗪（Ba）单体和 10-（2,5-二羟基苯基）-10-氢-9-氧-10-磷-10-氧化物（DOPO-HQ）被用于制备阻燃和隔热的聚苯并恶嗪（PBa）复合气凝胶。傅里叶变换红外（FTIR）、X 射线光电子能谱（XPS）和扫描电子显微镜（SEM）证实了 PBa 复合气凝胶的成功制备。通过热重分析（TGA）和锥形量热仪研究了原始 PBa 和 PBa 复合气凝胶的热降解行为和阻燃性能。DOPO-HQ 的加入略微降低了 PBa 的起始分解温度，增加了残炭量。将 5%的 DOPO-HQ 掺入 PBa 中，使放热率峰值降低了 33.1%，总热释放量降低了 58.7%。通过 SEM、拉曼光谱和 TGA 与红外光谱联用（TG-FTIR）研究了 PBa 复合气凝胶的阻燃机理。气凝胶具有合成工艺简单、易于放大、重量轻、导热系数低、阻燃性能好等优点。
