Xu Bo, Ma Wen, Shao Lushan, Qian Lijun, Qiu Yong
School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Fucheng Road 11, Beijing 100048, People's Republic of China.
Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Fucheng Road 11, Beijing 100048, People's Republic of China.
R Soc Open Sci. 2019 Mar 20;6(3):181413. doi: 10.1098/rsos.181413. eCollection 2019 Mar.
An organic triazine charring agent hybrid with zinc oxide (OTCA@ZnO) was prepared and well characterized through Fourier transform infrared spectrometry (FTIR), solid-state nuclear magnetic resonance (SSNMR), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The flame retardancy and thermal behaviour of intumescent flame retardant ethylene-vinyl acetate (EVA) composites combining OTCA@ZnO and ammonium polyphosphate (APP) were investigated using limited oxygen index (LOI), UL-94 vertical burning, cone calorimetry and TGA. The structure and morphology of chars were investigated by scanning electron microscopy (SEM), FTIR, laser Raman spectroscopy analysis (LRS) and X-ray photoelectron spectroscopy (XPS). Results revealed that OTCA@ZnO exhibited excellent thermal stability and dispersity after hybridization. The flame retardancy and smoke suppression properties of EVA were significantly improved by introducing APP/OTCA@ZnO. TGA results indicated that APP/OTCA@ZnO presented an excellent synergistic effect and promoted the char formation of EVA composites. Residue analysis results showed more char with high quality connected by richer P-O-C, P-N and P-O-Si structures was formed in APP/OTCA@ZnO system than APP/HOTCA/ZnO system, which consequently suppressed more efficiently the combustion and smoke production due to the catalytic carbonization effect of hybrid.
制备了一种与氧化锌杂化的有机三嗪成炭剂（OTCA@ZnO），并通过傅里叶变换红外光谱（FTIR）、固体核磁共振（SSNMR）、透射电子显微镜（TEM）和热重分析（TGA）对其进行了充分表征。采用极限氧指数（LOI）、UL-94垂直燃烧、锥形量热法和TGA研究了结合OTCA@ZnO和聚磷酸铵（APP）的膨胀型阻燃乙烯-醋酸乙烯酯（EVA）复合材料的阻燃性能和热行为。通过扫描电子显微镜（SEM）、FTIR、激光拉曼光谱分析（LRS）和X射线光电子能谱（XPS）研究了炭层的结构和形态。结果表明，OTCA@ZnO杂化后表现出优异的热稳定性和分散性。引入APP/OTCA@ZnO显著提高了EVA的阻燃性能和抑烟性能。TGA结果表明，APP/OTCA@ZnO呈现出优异的协同效应，促进了EVA复合材料的成炭。残渣分析结果表明，与APP/HOTCA/ZnO体系相比，APP/OTCA@ZnO体系中形成了更多由更丰富的P-O-C、P-N和P-O-Si结构连接的高质量炭层，因此由于杂化物的催化碳化作用，更有效地抑制了燃烧和烟雾产生。
