棉纤维表面氨基硅的膜形貌及其定向排列方式

 用场发射扫描电镜FE-SEM和光电子能谱仪XPS研究了天然棉纤维表面氨基硅——N-β-氨乙基-γ-氨丙基聚二甲基硅氧烷(ASO-1)的膜形貌及其定向排列成膜方式。结果发现,在观察尺寸WD≥200 nm的条件下,ASO-1在棉纤维表面形成的硅膜呈相对均匀的平滑形貌。XPS定量分析表明,在ASO-1处理后的棉纤维表面,大多数N原子被固定在硅膜与纤维的界面。这表明氨基硅在棉纤维表面的定向排列成膜方式为:硅甲基朝外伸向空气,Si—O偶极键及极性氨基指向纤维界面。

Film morphology and molecular orientation of amino functional polysiloxane on cotton fiber substrate

Film morphology and molecular orientation of N-β-aminoethyl-γ-aminopropyl polysiloxane(ASO-1) on cotton fiber were investigated by field emission scanning electronic microscope(FE-SEM) and X-ray photoelectron microscope(XPS).The experiment results indicated that the ASO-1 formed a uniform,some smooth film on the treated cotton fiber surface,especially as the working distance(WD) of FE-SEM is more than 200 nm.The XPS analysis showed that most of the N atoms from amino functional polysiloxane were fixed onto the interface between the cotton fiber and ASO-1.All of these suggests that the molecular orientation of ASO-1 on natural cotton fiber substrate is in such a manner that the silicon methyl groups project outward into air,while Si—O dipole bonds as well as amino groups point to the fiber interface.