在丝上现场合成银纳米颗粒:生产抗菌面料
Xiao-Qian Jin1, Jia-Lei Li1, Jie Liu1
1Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710129, China.
Bioprocess and biosystems engineering
|March 3, 2025
概括
研究人员开发了一种新的方法,通过将银纳米粒子直接合成到织物表面,制造出抗菌丝织物. 这种环保工艺可以产生高效的抗菌材料,而不会损害织物性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 织工程 织工程 织工程
背景情况:
- 织品的传统抗菌处理通常涉及强化学品或涂料,这些涂料可以降低织物的性能.
- 为织品开发可持续和有效的抗菌涂料对于医疗保健和卫生方面的应用至关重要.
研究的目的:
- 开发一种有效的现场方法,在丝织物上合成银纳米粒子 (AgNP).
- 评估Ag NP涂层丝织物的抗菌效果和物理性能.
- 探索使用丝组件作为纳米粒子合成天然还原剂的潜力.
主要方法:
- 在丝上用丝氨基酸和纤维素作为降解剂与酸银一起在地合成AgNP.
- 使用扫描电子显微镜 (SEM),能量分散式X射线光谱学 (EDS),里埃变换红外光谱学 (FTIR) 和X射线光电子光谱学 (XPS) 进行Ag NP涂层丝的表征.
- 对大肠杆菌的抗菌活性,吸水性质 (恢复水分,保持水分,垂直高度),机械性质和颜色变化的评估.
主要成果:
- 在没有额外的催化剂的情况下,在丝,丝虫子,丝纤维和丝上成功地在现场合成了AgNP.
- 对大肠杆菌达到了高达99.91%的令人印象深刻的抗菌率.
- Ag NP涂层并没有显著损害丝织物的吸水能力.
- 机械性能基本保持不变,尽管观察到轻微的黄色变色.
结论:
- 已经建立了一种有效和环保的方法,通过现场Ag NP合成生产抗菌丝织物.
- 开发的抗菌丝织物对抗阴性细菌表现出很好的疗效,并保留了可取的物理特性.
- 这项技术对开发各种应用的先进抗菌织品具有重大前景.
相关概念视频
01:29Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
01:27Production of Antibiotics
Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
01:30Production of Pharmaceuticals
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...