Wu Fangyi, Bao Xiaohui, Wang Jiangbo
School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315211, China.
Polymers (Basel). 2021 Nov 18;13(22):3985. doi: 10.3390/polym13223985.
A novel graphene-based phosphorus/silicon-containing flame retardant (GO-DOPO-V) was obtained via one-step reduction of graphene oxide (GO) with phosphorus/silicon-containing compound (DOPO-V). The Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectrometer (XPS), Atomic force microscope (AFM) and Thermogravimetric analysis (TGA) measurements were used to confirm the structure and morphology. After incorporation of 2 wt% GO-DOPO-V, the maximum decreases of 28.8% in peak heat release rate and 15.6% in total heat release are achieved compared to that of pure epoxy resin (EP). Furthermore, TGA and Scanning electron microscopy (SEM) measurement showed that GO-DOPO-V significantly enhanced the thermal stability and residual char strength of EP. Thus, attributed to the barrier effect of GO and phosphorus/silicon layer formation by DOPO-V, GO-DOPO-V was a high-efficient flame retardant to improve the combustion behavior of EP nanocomposite.
通过用含磷/硅化合物（DOPO-V）一步还原氧化石墨烯（GO），获得了一种新型的基于石墨烯的含磷/硅阻燃剂（GO-DOPO-V）。采用傅里叶变换红外（FTIR）光谱、X射线光电子能谱仪（XPS）、原子力显微镜（AFM）和热重分析（TGA）测量来确认其结构和形态。与纯环氧树脂（EP）相比，加入2 wt%的GO-DOPO-V后，峰值热释放速率最大降低了28.8%，总热释放降低了15.6%。此外，TGA和扫描电子显微镜（SEM）测量表明，GO-DOPO-V显著提高了EP的热稳定性和残余炭强度。因此，由于GO的阻隔效应和DOPO-V形成的磷/硅层，GO-DOPO-V是一种提高EP纳米复合材料燃烧性能的高效阻燃剂。
