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制备了锐钛矿型掺杂二氧化钛(M粒子),将偶联剂SEA-171锚固接枝到M粒子表面后(M-1粒子),再以聚甲基丙烯酸甲酯(PMMA)接枝改性M-1粒子(M-2粒子),并制备了M系列粒子/氰酸酯树脂(CE)基复合材料。利用表面分析、元素分析、红外光谱、热重分析、X射线衍射、透射电镜、扫描电镜等研究了多步接枝的机理以及粒子的结构。结果表明:SEA-171实现了在掺杂粒子表面的锚固。PMMA的接枝实现了无机粒子表面的有机化,提高了改性掺杂粒子在复合材料中的分散性,有利于提高复合材料的综合性能。
Anatase doped titanium dioxide (M particles) was prepared. The coupling agent SEA-171 was grafted onto the surface of M particles (M-1 particles), and then polymerized with polymethylmethacrylate (PMMA) M-1 particles (M-2 particles) were prepared and M series particles / cyanate resin (CE) matrix composites were prepared. The mechanism of multi-step grafting and the structure of the particles were investigated by surface analysis, elemental analysis, IR, TG, XRD, TEM and SEM. The results show that SEA-171 achieves anchoring on the surface of doped particles. The grafting of PMMA realizes the organic surface of the inorganic particles, improves the dispersibility of the modified doping particles in the composite material, and helps to improve the comprehensive performance of the composite material.