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中文摘要：
用3-氨丙基三乙氧基硅烷对纳米SiO2行表面修饰,并与三羟甲基丙烷三丙烯酸酯进行Micheal加成反应制备含叔胺结构的可聚合纳米SiO2杂化粒子。FT-IR和TGA分析表明：含叔胺结构的有机化合物接枝到了纳米SiO2表面,接枝率为22.6%。将其应用于光固化涂料中,纳米SiO2杂化粒子在涂料中分散均匀,可克服涂料光固化过程中的氧阻效应,提高涂料的CC双键转化率,涂料固化膜的铅笔硬度和耐磨性能均有显著改善。
英文摘要：
Nanosilica was modified with 3-aminopropyltriethoxysilane,then reacted with trimethylopropane triacrylate to prepare polymerizable silica hybrid nanoparticles with tertiary amine moiety.Characterization of the modified nanosilica by FT-IR and TGA shows that the tertiary amine structural compound was grafted onto the nanosilica,the percentage of grafting for silica was about 22.6%.Determination of conversion of CC double bonds of coatings with silica hybrid nanoparticles discloses that the photopolymerization rate increased because oxygen inhibition was overcome by tertiary amine during curing process.After cured of coatings with modified nanosilica,the pencil hardness and abrasion resistance of films were also improved.
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