【摘要】 为了将具有特殊功能性的超细粒子Fe3 Al粉末均匀地分散于聚合物基体中 ,利用溶解吸附的方法在超细Fe3 Al粉末表面涂覆了硬脂酸和硅烷A 1 72偶联剂 .采用TG分析法测定了两种偶联剂在Fe3 Al粉末表面的单分子层饱和吸附量 (硬脂酸 1 2 4 %、A 1 72 1 8% ) ;借助红外光谱测试结果讨论了两种偶联剂与Fe3 Al粉末表面之间的作用机理 ;借助SEM观察了超细Fe3 Al粉末在聚合物基体中的分散情况 .结果表明 ,未经偶联剂处理的Fe3 Al粉末在基体中大量团聚 ,在单分子层饱和吸附量下经两种偶联剂处理的超细Fe3 Al粉末能均匀地分散于基体中 ,尤其是硅烷偶联剂的作用效果较好更多还原

【Abstract】 Coupling agent plays an important role in increasing the dispersivity and compatibility between ultrafine Fe 3Al powder and polymer matrix.The single molecular layer saturated adsorption of two coupling agents:stearic acid and A 172 on Fe 3Al powder surface was determined by TG analysis(stearic acid 1 24%,A 172 1 8%).The reaction mechanism between powder surface and coupling agent was studied with IR spectra.With SEM photography the effects of two coupling agents on the dispersivity of Fe 3Al powder into polymer matrix were compared at this adsorption amount.Coupling agent A 172 is the better choice because it can make ultrafine Fe 3Al powder effectively disperse in polymer matrix.更多还原