Stabilization of plasma-polymerized allylamine films by ethanol extraction.
Stabilization of plasma-polymerized allylamine films by ethanol extraction.
复制标题
通过乙醇萃取稳定等离子体聚合的烯丙胺膜。
作者：
Li;W. Knoll;R. Förch
利用表面等离子体共振（SPR）和光波导光谱（OWS）研究了乙醇萃取对等离子体聚合烯丙基胺（PPAA）薄膜厚度的影响。结果发现，许多新沉积的PPAA膜在乙醇处理后损失。PPAA厚度的减小与等离子体输入功率、单体蒸气压和沉积膜的厚度有关。尽管膜厚度损失相对较高，但提取的PPAA中的胺基团的密度与新鲜膜的密度相当，如通过傅里叶变换红外（FT-IR）光谱所见。本研究的结果是特别重要的等离子体聚合的功能薄膜，其中与水介质接触的等离子体聚合物的稳定性是必不可少的生物医学应用。
The effect of ethanol extraction on plasma-polymerized allylamine (PPAA) films was investigated by measuring their thickness change using surface plasmon resonance (SPR) spectroscopy and optical waveguide spectroscopy (OWS). It was found that much of the freshly deposited PPAA films is lost upon ethanol treatment. The decrease in PPAA thickness is related to the plasma input power, the monomer vapor pressure, and the thickness of the deposited films. Despite the relatively high loss in film thickness, the densities of the amine groups in the extracted PPAA are comparable to those of fresh films, as seen by Fourier transform infrared (FT-IR) spectroscopy. The results of this study are of specific importance with respect to the biomedical application of plasma-polymerized functional thin films, in which the stability of a plasma polymer in contact with aqueous media is essential.