Film Morphology and Orientation of N-β-Aminoethyl-γ-aminopropyl-polysiloxane on Cellulose Model Substrates

摘要

The film morphology of N-β-aminoethyl-γ-aminopropylpolysiloxane (ASO-1) on cellulose model substrates such as cotton, regenerated cellulose, and nitrocellulose were investigated by atomic force microscopy (AFM), field emission scanning electronic microscopy (FESEM), X-ray photoelectron microscopy (XPS), and other instruments. The ASO-1 film was homogenous and strongly hydrophobic on natural cotton and cellulose model substrates—the average roughness of the treated model surface was reduced. XPS analysis indicated that most of the nitrogen was depleted from the treated cotton fiber surface and fixed onto the treated fiber interface. Results suggest that the orientation of ASO-1 molecule on cotton and the cellulose model substrates project the silicon methyl groups outward into the air, and the Si-O dipole bonds and cationic ammonium groups toward the fiber interface.