聚乙烯/银纳米纤维复合材料：一种用于抗菌薄膜的材料。
Polyethylene/silver-nanofiber composites: A material for antibacterial films.
作者信息
Zapata Paula A, Larrea Maialen, Tamayo Laura, Rabagliati Franco M, Azócar M Ignacio, Páez Maritza
机构信息
Grupo Polímeros, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Casilla 40, Correo 33, Santiago, Chile.
Universidad del País Vasco/Euskal Herriko Unibertsitatea, P° Manuel Lardizabal, 3, 20018 Donostia-San Sebastián, Gipuzkoa, Spain.
出版信息
Mater Sci Eng C Mater Biol Appl. 2016 Dec 1;69:1282-9. doi: 10.1016/j.msec.2016.08.039. Epub 2016 Aug 15.
Silver nanofibers (Ag-Nfbs)~80nm in diameter were synthesized by hydrothermal treatment. The nanofibers (3 and 5wt%) were added in the initial feed together with the catalytic system. Polymerizations in an ethylene atmosphere were performed, yielding PE nanocomposites in situ with 3 and 5wt% content of Ag-Nfbs. The antibacterial effect of the silver-nanofiber composites was evaluated after incubation of Escherichia coli ATCC 25923 for 8h on their surface. Bacterial viability tests showed that the silver-nanofiber composites inhibited the growth of Escherichia coli ATCC 25923 by 88 and 56%. This behavior is attributed to increased silver ions release from the nanocomposite. TEM analysis showed that the antibacterial effect is associated with membrane disruption but not with changes in shape.
通过水热处理合成了直径约80nm的银纳米纤维（Ag-Nfbs）。将纳米纤维（3wt%和5wt%）与催化体系一起添加到初始进料中。在乙烯气氛中进行聚合反应，原位生成Ag-Nfbs含量为3wt%和5wt%的聚乙烯纳米复合材料。在大肠杆菌ATCC 25923在银纳米纤维复合材料表面培养8小时后，评估了银纳米纤维复合材料的抗菌效果。细菌活力测试表明，银纳米纤维复合材料对大肠杆菌ATCC 25923的生长抑制率分别为88%和56%。这种行为归因于纳米复合材料中银离子释放量的增加。透射电子显微镜（TEM）分析表明，抗菌效果与细胞膜破坏有关，而与形状变化无关。
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