Adsorption of chitosan on spin-coated cellulose films
Adsorption of chitosan on spin-coated cellulose films
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DOI：
10.1016/j.carbpol.2009.10.062
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发表时间：
2010-03-25
影响因子：
11.2
通讯作者：
Carvalho, A. J. F.
中科院分区：
文献类型：
--
作者：
Da Roz, A. L.;Leite, F. L.;Carvalho, A. J. F.
本文报道了超薄壳聚糖层在纤维素旋涂膜上的吸附，其中有效的吸附是通过氧化纤维素来诱导的，它为带正电荷的壳聚糖提供了阴离子相互作用的场所。傅立叶变换红外光谱(FTIR)和X-射线光电子能谱(XPS)均证实了纤维素的氧化和壳聚糖的吸附。壳聚糖与纤维素之间的分子水平相互作用涉及N-H基团，从壳聚糖对纤维素FTIR光谱中1667 cm(-1)的酰胺带的吸附消失可以推断。XPS数据证实，壳聚糖被吸附在氧化纤维素膜上时，氮基的原子浓度显著增加，从2.16%增加到4.73%，这也导致了原子力显微镜图像显示的膜更坚韧。人们现在可以设想将壳聚糖的杀菌作用与纤维素的生物相容性相结合的应用。(C)2009爱思唯尔有限公司。保留所有权利。
This paper reports on the adsorption of an ultrathin chitosan layer on spin-coated films of cellulose, where efficient attachment was induced by oxidizing Cellulose which provided anionic sites for electrostatic interaction with the positively charged chitosan. Both the cellulose oxidation and the chitosan adsorption were confirmed with Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) Measurements. The molecular-level interaction between chitosan and cellulose involved the N-H groups, as inferred from the disappearance Caused by chitosan adsorption of the amide band at 1667 cm(-1) in the FTIR spectrum of cellulose. The XPS data confirmed a significant increase in the atomic concentration of nitrogen groups, from 2.16% to 4.73% when chitosan was adsorbed on the oxidized cellulose film, which also led to tougher films as illustrated by atomic force microscopy images. One may now envisage applications in which the bactericide action of chitosan is combined with the biocompatibility of cellulose. (C) 2009 Elsevier Ltd. All rights reserved.