用银纳米颗粒装饰的氨基基修饰纤维素纳米纤维的抗菌活性
Vesna Lazić1, Jovan M Nedeljković1, Vanja Kokol2
1Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, Centre of Excellence for Photoconversion, 11000 Belgrade, Serbia.
Journal of functional biomaterials
|October 25, 2024
概括
研究人员通过将银纳米粒子与氨基功能化的纤维素纳米纤维结合起来,开发出了新的抗菌混合微粒. 这些材料提供受控的银离子释放和广泛的病原体抑制,显示出长期抗菌应用的希望.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 生物技术是生物技术.
背景情况:
- 纤维素纳米纤维 (CNF) 是多功能生物材料,在药物输送和抗菌系统中具有潜在的应用.
- 银纳米颗粒 (Ag NPs) 具有强大的抗微生物特性,但经常遭受聚合和不受控制的释放.
- 使用氨基基群 (NH2-CNF) 功能化的CNF可以促进AgNP的现场合成,并增强它们与微生物表面的相互作用.
研究的目的:
- 合成和表征与氨基功能化纤维素纳米纤维素 (NH2-CNFs) 结合的银纳米粒子 (Ag NPs).
- 评估由此产生的无机有机混合微粒的抗微生物活性和离子释放动力学.
- 评估这些混合物在持续抗微生物应用中的潜力.
主要方法:
- 在NH2-CNF上通过氨基基团减少银离子以现场合成AgNP.
- 谱学和传输电子显微镜 (TEM) 用于对Ag NP的大小和分布进行表征.
- 测量 ζ-电位和表面电荷以确定静电性质.
- 针对大肠杆菌, Pseudomonas aeruginosa,金黄色葡萄球菌和白菌的抗菌分析.
- 长期离子释放研究.
主要成果:
- 非聚合,纳米尺寸的Ag NP在高负荷 (20 wt-%) 时成功地集成到NH2-CNF中.
- 混合材料保持了正面电荷,使其能够与负电荷的病原体细胞壁进行静电相互作用.
- 对测试的病原体的抗微生物活性与原始的NH2-CNFs相比.
- 在一个月内观察到Ag+离子的缓慢和受控释放 (释放量小于1.0%).
结论:
- 开发的NH2-CNF/Ag NP混合物为控制的银离子输送提供了一个稳定的平台.
- 这些混合微粒显示出有效的广泛抗菌活性,具有持续释放应用的潜力.
- 纤维素纳米纤维和银纳米颗粒的组合为先进的抗菌材料提供了一个有希望的战略.
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