锚固处理对SiO_2/CE复合材料静态力学性能的影响

采用偶联剂SEA-171对纳米SiO2表面进行了处理(M-1),再由偶氮异丁腈对M-1进行锚固表面处理(M-2),对产物进行了红外,元素分析和热失重分析。研究了上述2种纳米SiO2的含量对其氰酸酯树脂复合材料静态力学性能的影响,并采用扫描电镜和透射电镜分析研究了材料界面结构特征,探讨了其作用机理。结果表明,当M-1的添加质量分数为3%时,复合材料的冲击强度增长61.9%;弯曲强度增长44.2%,添加4%M-2时,增幅分别为89.0%和53.8%。经锚固处理后,纳米SiO2颗粒团聚程度减小,在高分子有机相中的分散更加均匀。

Effect of anchoring interface treatment on the static mechanical properties of SiO2/CE composites

The nano-SiO2 surface was treated with coupling agent SEA-171(M-1)and then M-2 was obtained by anchoring surface treatment with azo isobutyronitrile.The products were characterized by IR,elemental analysis and thermal gravimetric analysis.The effects of these two kinds of nano-SiO2 contents on the static mechanical properties of their cyanate ester resin composites were investigated.The structural features of material interface and their action mechanism were studied by scanning electron microscopy and transmission electron microscopy.The results showed that the impact strength and flexural strength of the composites with M-1 mass fraction 3% were increased by 61.9% and 44.2%,repectively.The datas of the composites adding 4% M-2 were increased by 89.0% and 53.8%,repectively.The agglomeration of nano-SiO2 particles was reduced and the particles were more evenly dispersed in the polymer organic phase after anchoring treatment.