四级盐基内在抗菌聚氨:优化抗菌活性通过硬片段的阴离子主链或侧链设计
Xingshuang Lv1, Zhi Li1, Zhenhao Zhang1
1Key Lab of Biobased Polymer Materials of Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.
ACS applied materials & interfaces
|October 14, 2024
概括
使用四级盐 (QAS) 的新型热塑性聚氨 (TPU) 具有强大的抗菌活性. 侧链QAS结构和较长的基链增强了对黄金葡萄球菌的疗效,提供了有前途的生物医学应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物医学工程 生物医学工程
背景情况:
- 热塑性聚氨 (TPU) 由于其有利的机械性能和生物相容性,在生物医学应用中被广泛使用.
- 细菌感染带来了重大挑战,需要开发具有内在抗菌性质的材料,用于医疗器械和公共空间.
研究的目的:
- 通过电离子主/侧链结构调节,开发具有增强抗菌活性的TPU.
- 调查N-基链长度,QAS含量和链类型对抗菌疗效的影响.
主要方法:
- 合成了两种含有四级盐 (QAS) 的链延长剂:M_n (主链类型) 和D_n (侧链类型).
- 将QAS组集成到TPU的硬分段中,以创建PU-M_n和PU-D_n.
- 系统评估合成的TPU膜的抗菌性质,热稳定性,机械性能和溶血活性.
主要成果:
- 在含有QAS的TPU中,较长的N-基链 (C6-C14) 显著增加了抗菌活性.
- 与主链类型的PU-M_n薄膜相比,侧链类型的PU-D_n薄膜显示出更高的接触活性抗菌疗效.
- 该PU-D14薄膜在仅1.6%的QAS含量下实现了近100%的杀死金黄色葡萄球菌,同时保持了良好的热稳定性 (>300°C) 和优良的机械性能 (抗拉强度20.7-47.5MPa,延伸>1000%),血解活性微不足道.
结论:
- 电离子主/侧链结构调节是赋予TPU抗菌性能的有效策略.
- 优化QAS含有TPU,特别是带有较长基链的侧链类型,为生物医学环境中对抗细菌感染提供了有希望的解决方案.
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