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Stabilization of [poly(allylamine)-tannic acid](n) multilayer films in acidic and basic conditions after crosslinking with NaIO4

机译:与NaiO4交联后酸性和碱性条件下[聚(allylamine)亚胺酸](n)多层膜的稳定化

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摘要

Thin films containing polyphenols offer great perspectives in terms of biomedical applications and as nano-reactors owing to the ability of polyphenols to reduce metallic cations or to form coordination complexes with them. In this report it is shown that films made from the alternated adsorption of a weak polyelectrolyte, poly(allylamine), and tannic acid which are intrinsically instable at low and high pH values can be made pH insensitive, at least from pH = 1 to pH = 13 by a single contact with a 10 mM sodium periodate solution. IO4- anions oxidize tannic acid which then reacts with the amino groups of poly(allylamine) to yield covalent bonds between them. In addition, the permeability of the (PAH-TA)(n) films for the anionic redox probe hexacyanoferrate is dramatically reduced upon reaction with IO4- without affecting the film morphology.
机译:含有多酚的薄膜在生物医学应用方面提供了很大的观点,并且由于多酚减少金属阳离子或与它们形成配位复合物的能力而导致纳米反应器。 在本报告中,示出了由弱聚电解质,聚(烯丙胺)和单宁酸的薄膜制成的薄膜,其在低和高pH值下本质上不敏感,至少从pH = 1至pH = 13通过单个接触与10mM钠周期溶液。 IO4 - 阴离子氧化单宁酸,然后与聚(allylamine)的氨基反应,得到它们之间的共价键。 此外,在与IO4-反应时显着降低了阴离子氧化还原探针六氰基甲醛的(PAH-TA)(N)薄膜的渗透性,而不影响薄膜形态。

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  • 来源
    《RSC Advances》 |2015年第69期|共6页
  • 作者

    Ball Vincent;

  • 作者单位

    Univ Strasbourg Fac Chirurg Dent F-67000 Strasbourg France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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