An Effective Way To Flame-Retard Biocomposite with Ethanolamine Modified Ammonium Polyphosphate and Its Flame Retardant Mechanisms
An Effective Way To Flame-Retard Biocomposite with Ethanolamine Modified Ammonium Polyphosphate and Its Flame Retardant Mechanisms
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DOI：
10.1021/acs.iecr.5b00123
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发表时间：
2015-04-08
影响因子：
4.2
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
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作者：
Guan, Ya-Hui;Huang, Jian-Qian;Wang, Yu-Zhong
木粉（WF）/聚丙烯（PP）复合材料（WPC）的生物复合材料由于PP和WF的阻燃机制不同，因此不容易受到火焰的粘贴。为了改善WPC的阻燃性，通过与乙醇胺的离子交换反应改性的乙醇胺的单个火焰（APP）的单个火焰（APP）被称为ETA-APP，用于制备粘贴质量WPC。通过限制氧指数（LOI），UL-94垂直燃烧试验和锥热量来研究易燃性。结果表明，火焰 - 威力WPC的阻燃特性得到了极大的改善。与WPC相比，限制氧指数为43.0％，与APP相同的WPC相比，该指数增加了71.6％。垂直燃烧测试可以通过UL-94 V-0额定值。锥量热测试的结果表明，与WPC/APP相比，WPC的热量释放速率（HRR）和WPC的总热量释放（THR）降低。通过热重分析（TGA），傅立叶变换红外（FTIR）和X射线光电子光谱（XPS）研究了WPC/ETA-APP系统的标志性机制。发现ETA-APP中的氢胺基和磷酸盐酸可能会促进WPC/ETA-APP中的醚化和脱水反应，从而促进了WPC的稳定CHAR残基的形成。因此，火焰效率得到了极大的提高。与WPC/30 wt％应用相比，WPC/30 wt％ETA-APP的挠曲性能增加了很多，这是因为ETA-APP与WF的兼容性更好。
Biocomposite of wood flour (WF)/polypropylene (PP) composite (WPC) is not easily flame-retarded because of the different flame retardant mechanisms of PP and WF. In order to improve the flame retardancy of WPC, a single flame retardant of ammonium polyphosphate (APP) modified via ion exchange reaction with ethanolamine, which is named as ETA-APP, was used to prepare flame-retardant WPC. The flammability was investigated by limiting oxygen index (LOI), UL-94 vertical burning test, and cone calorimeter. The results show the flame retardant properties of the flame-retardant WPC are improved greatly. The limiting oxygen index is 43.0%, which is increased by 71.6% compared with that of WPC with the same content of APP. And the vertical burning test can pass UL-94 V-0 rating. The results of cone calorimeter test show that the heat release rate (HRR) and total heat release (THR) of the WPC with ETA-APP are decreased in comparison with WPC/APP. The flame-retardant mechanism of WPC/ETA-APP system was investigated by thermogravimetric analysis (TGA), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). It is found that the hydroamine groups and phosphate acid in ETA-APP might promote the etherification and dehydration reactions in WPC/ETA-APP, which facilitated the formation of stabile char residue of WPC. Consequently, the flame-retardant efficiency is improved greatly. The flexural properties of WPC/30 wt % ETA-APP increase a lot in comparison with WPC/30 wt % APP, which is because of the better compatibility of ETA-APP with WF.