A new photoactivable material based on polyethylene imine with allyl functions (A-PEI monomer) was synthesized to develop new hydrogel. The water-based photoinitiating system consisting of anthraquinone-2-sulfonic acid (AQS) and N-methyldiethanol amine (MDEA) was studied by laser flash photolysis and electron paramagnetic resonance. LED@385 nm exposure of this combination of AQS with MDEA in aqueous medium has led to the formation of -aminoalkyl radicals which were able to cross-link the acrylamide and A-PEI to generate new antibacterial materials in reduced time and under air. Interestingly, the addition of the multifunctional A-PEI monomer to acrylamide derived monomers has led to faster gel formation and an increase of the instantaneous G' modulus value. The resulting hydrogel containing quaternary ammonium groups on its surface has demonstrated excellent anti-adherence and biocide properties against Escherichia coli and Staphylococcus aureus.

中文翻译：

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水性光引发体系光致合成抗菌水凝胶

合成了一种基于具有烯丙基功能的聚乙烯亚胺（A-PEI 单体）的新型光敏材料，以开发新型水凝胶。通过激光闪光光解和电子顺磁共振研究了由蒽醌-2-磺酸（AQS）和N-甲基二乙醇胺（MDEA）组成的水性光引发体系。这种 AQS 与 MDEA 的组合在水性介质中的 LED@385 nm 暴露导致形成 α-氨基烷基自由基，这些自由基能够交联丙烯酰胺和 A-PEI，从而在更短的时间内和在空气中产生新的抗菌材料。有趣的是，将多功能 A-PEI 单体添加到丙烯酰胺衍生单体中导致凝胶形成更快，瞬时 G' 模量值增加。