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首页> 外文期刊>Materials science & engineering, C. Materials for Biogical applications >Hydroxyapatite-silver nanoparticles coatings on porous polyurethane scaffold
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Hydroxyapatite-silver nanoparticles coatings on porous polyurethane scaffold

机译：多孔聚氨酯支架上的羟基磷灰石-银纳米颗粒涂层

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摘要

The present paper is focused on a study regarding the possibility of obtaining hydroxyapatite-silver nanoparticle coatings on porous polyurethane scaffold. Themethod applied is based on a combined strategy involving hydroxyapatite biomimetic deposition on polyurethane surface using a Supersaturated Calcification Solution (SCS), combined with silver ions reduction and in-situ crystallization processes on hydroxyapatite-polyurethane surface by sample immersing in AgNO_3 solution. Themorphology, composition and phase structure of the prepared samples were characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEMEDX), X-ray diffraction (XRD), UV-Vis spectroscopy and X-ray photoelectron spectroscopy (XPS) measurements. The data obtained show that a layer of hydroxyapatite was deposited on porous polyurethane support and the silver nanoparticles (average size 34.71 nm) were dispersed among and even on the hydroxyapatite crystals. Hydroxyapatite/polyurethane surface acts as a reducer and a stabilizing agent for silver ions. The surface plasmon resonance peak in UV-Vis absorption spectra showed an absorption maximum at 415 nm, indicating formation of silver nanoparticles. The hydroxyapatite-silver polyurethane scaffolds were tested against Staphylococcus aureus and Escherichia coli and the obtained data were indicative of good antibacterial properties of the materials.
机译：本文专注于有关在多孔聚氨酯支架上获得羟基磷灰石-银纳米颗粒涂层的可能性的研究。所采用的方法基于以下组合策略：使用超饱和钙化溶液（SCS）在聚氨酯表面进行羟基磷灰石仿生沉积，然后通过将样品浸入AgNO_3溶液中，结合银离子还原和羟基磷灰石-聚氨酯表面原位结晶过程。通过扫描电子显微镜，能量色散X射线光谱（SEMEDX），X射线衍射（XRD），UV-Vis光谱和X射线光电子能谱（XPS）测量来表征所制备样品的形态，组成和相结构。 。所获得的数据表明，羟基磷灰石层沉积在多孔聚氨酯载体上，并且银纳米粒子（平均粒径34.71 nm）分散在羟基磷灰石晶体之间甚至在羟基磷灰石晶体上。羟基磷灰石/聚氨酯表面充当银离子的还原剂和稳定剂。 UV-Vis吸收光谱中的表面等离子体共振峰在415 nm处显示最大吸收，表明形成了银纳米颗粒。测试了羟基磷灰石-银聚氨酯支架对金黄色葡萄球菌和大肠杆菌的抵抗力，获得的数据表明该材料具有良好的抗菌性能。

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