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

机译：基于PPEGMEMA的阳离子共聚物设计用于逐层组装

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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：我们已经合成了三种基于PPEGMEMA的阳离子共聚物，具有相似的胺含量，但是PEG侧链的平均长度有系统的变化。将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。已经证明，就PEG单元的平均长度的系统变化而言，聚合物设计影响了聚电解质多层的生长机理，并且可以用于调整层的结构性质和含水量。另外，通过存在于共聚物主链中的胺基的部分交联，防止了由pH变化引起的膜的崩解。最后，证明了交联的多层膜如何根据pH值表现出阳离子，两性离子和阴离子性质，以及这些变化与溶胀，层收缩和水含量变化如何相关。

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