pH-sensitive nanostructured architectures based on synthetic and/or natural weak polyelectrolytes
pH-sensitive nanostructured architectures based on synthetic and/or natural weak polyelectrolytes
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基于合成和/或天然弱聚电解质的 pH 敏感纳米结构结构
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Schwarz
中科院分区：
文献类型：
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作者：
Marcela Mihai;I. Stoica;S. Schwarz
本研究旨在证明聚电解质的结构和双层数对由互补的弱聚电解质在平面上逐层自组装形成的一些新的纳米结构结构的性能的影响。为此，我们以壳聚糖和聚烯丙胺盐酸盐为聚阳离子，以聚(丙烯酸)和聚(2-丙烯酰胺-2-甲基丙磺酸-共聚丙烯酸)为聚阴离子。为了获得聚电解质多层膜的形成和性质的直接图像，使用了重量分析、红外光谱和原子力显微镜。多离子对互补多离子电荷的过度补偿能力，进而影响薄膜在水中的溶胀度，受到薄膜的链状结构和柔韧性的强烈影响。特别注意了新复合材料对溶胀环境的pH的响应。
This study aims to evidence the influence of polyelectrolytes structure and the number of double layers on the properties of some new nanostructured architectures formed by layer-by-layer self-assembly of complementary weak polyelectrolytes on planar surfaces. For this purpose, we used chitosan and poly(allylamine hydrochloride) as polycations, and poly(acrylic acid) and poly(2-acrylamido-2-methylpropanesulfonic acid–co-acrylic acid) as polyanions. To get a direct image on the polyelectrolyte multilayers formation and properties, gravimetry, infrared spectroscopy, and atomic force microscopy have been used. The capacity of the polyions to overcompensate the complementary polyions charges, and thus to influence the swelling degree in water of thin films, was strongly influenced by the chain structure and flexibility. A special attention was paid to the responsiveness of the new composite materials to the pH of the swelling environment.