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PPEGMEMA-based cationic copolymers designed for layer-by-layer assembly

机译:基于PPEGMEMA的阳离子共聚物,专为逐层组装而设计

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摘要

We have synthesized three PPEGMEMA-based cationic copolymers with similar amine contents but with systematic variation in the average length of the PEG side chains. The positively charged copolymers were paired with alginate to fabricate layer-by-layer assembled multilayered films. It was demonstrated that the polymeric design, in terms of the systematic variation in the average length of the PEG units, affects the polyelectrolyte multilayer growth mechanism and can be used to tune the structural properties and the water content of the layers. In addition, by partial cross-linking of the amine groups present in the copolymer backbone, disintegration of the film induced by pH changes was prevented. Finally, it was demonstrated how the cross-linked multilayered film can exhibit cationic, zwitterionic and anionic properties depending on the pH value and how these changes are associated with swelling, layer contraction and changes in water content.
机译:我们合成三种基于PPEGMEMA的阳离子共聚物,其具有类似的胺含量,但具有PEG侧链的平均长度的系统变化。 带正电荷的共聚物与藻酸盐配对以制造逐层组装的多层膜。 据证明,在PEG单元的平均长度的系统变化方面,聚合物设计影响了聚电解质多层生长机制,可用于调整层的结构性质和水含量。 另外,通过将存在于共聚物骨架中存在的胺基的部分交联,防止了通过pH变化诱导的膜的崩解。 最后,证明了交联的多层薄膜如何根据pH值表现出阳离子,两端和阴离子性质以及这些变化如何与溶胀,层收缩和水含量的变化相关。

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    《RSC Advances》 |2019年第46期|共12页
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  • 正文语种 eng
  • 中图分类 化学;
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