Composite Thin Film by Hydrogen-Bonding Assembly of Polymer Brush and Poly(vinylpyrrolidone)

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• 作者：Shuguang Yang ; Yongjun Zhang ; Li Wang ; Song Hong ; Jian Xu ; Yongming Chen ; and Chengming Li
• 刊名：Langmuir
• 出版年：2006
• 出版时间：January 3, 2006
• 年：2006
• 卷：22
• 期：1
• 页码：338 - 343
• 全文大小：568K
• 年卷期：v.22,no.1(January 3, 2006)
• ISSN：1520-5827

文摘

Based on hydrogen-bonding layer-by-layer (LBL) assembly in aqueous solution, poly(vinylpyrrolidone) (PVPON)and a spherical polymer brush with a poly(methylsilsesquioxane) (PSQ) core and poly(acrylic acid) (PAA) hair chainswere used to fabricate composite multilayer thin films. Hydrogen bonding as the driving force was confirmed by FT-IRspectrometry. A simple method (Filmetric F20) was introduced to determine the thickness and refractive index of thefilms. The film thickness was found to be a linear function of the number of bilayers. The average increase in thicknessper bilayer is 28.3 nm. The film morphology was characterized with scanning electron microscopy and atomic forcemicroscopy. The images obtained from the two instruments show a great resemblance. The films were further calcinedto get an inorganic film by removing the organic components, or treated with tetrabutylammonium fluoride (TBAF)to remove the PSQ core and get an organic film. The optical properties and morphological changes induced by thesetreatments were also studied.