聚乙烯醇
自愈水凝胶
壳聚糖
抗菌活性
多金属氧酸盐
肿胀 的
铵
离子液体
热稳定性
化学
钋
化学工程
戊二醛
细菌
材料科学
核化学
高分子化学
有机化学
复合材料
催化作用
生物
工程类
遗传学
作者
Qiang Li,Yulan Hu,Bingjian Zhang
标识
DOI:10.1016/j.carbpol.2020.117592
摘要
Historical monuments are increasingly being threatened by unexpected microbial colonizers, leading to their subsequent deterioration. Here, two tetraalkylphosphonium polyoxometalate ionic liquids (Q14-IL and Q16-IL) were successfully synthesized, which showed excellent antibacterial activity against four bacteria colonising wall paintings. Notably, Q14-IL exhibited superior antibacterial efficacy compared to longer alkyl Q16-IL. Additionally, polyvinyl alcohol/chitosan (PVA-CS) hydrogels containing two ILs were prepared, and the morphology, thermal stability, swelling ratio and antibacterial activity were systematically evaluated. The results suggest that higher CS content resulted in more uniform micropores and increased the swelling ratio. However, fewer antibacterial ILs were released and diffused over time from the matrix. Hydrogels with 5% CS content exhibited the highest antibacterial activity, which was mainly attributed to the synergetic antibacterial activity of positively charged ammonium (−NH3+) groups of CS and quaternary phosphonium cation of ILs. This study may provide an alternative strategy for fighting against bacterial communities colonising ancient artworks.
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