Facile synthesis of elemental silver by the seed nucleus embedding method for antibacterial applications
Facile synthesis of elemental silver by the seed nucleus embedding method for antibacterial applications
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DOI：
10.1007/s10570-018-1952-7
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发表时间：
2018-07
期刊：
影响因子：
5.7
通讯作者：
Honglei Chen;Xin Zhao;Yu Liu;F. Kong;Xingxiang Ji
中科院分区：
文献类型：
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作者：
Honglei Chen;Xin Zhao;Yu Liu;F. Kong;Xingxiang Ji
摘要提出了一种基于种子核形成的纤维素纸载银（Ag）的制备方法，作为一种具有高抗菌性能的功能材料。采用金属钯（Pd）形成晶种核，然后通过酒石酸钾钠四水合物还原以产生Pd-Ag-纤维素纸。研究了复合材料的微观形貌、银粒子的分布、抗菌性能和银释放行为。结果证实了Pd核在纤维表面的形成，并揭示了银粒子在嵌入的种子核的基础上稳定地沉积在纤维上。与直接沉积法制备的银-纤维素纸相比，钯-银-纤维素纸具有较厚的紧密银层和均匀的银颗粒分布。抑菌试验表明，钯银纤维素纸对大肠杆菌E.大肠杆菌的检出率为99.92%，与银纤维素纸的检出率（99.93%）非常接近。尽管如此，银释放回归方程提供了高斜率值（0.075）的银-纤维素纸，这解释了快速释放的银。相比之下，Pd-Ag-纤维素纸的斜率值仅为0.021，这表明实现了银的较慢释放。利用该方法制备的载银纤维素纸在银负载、抗菌和银缓释方面表现出突出的性能。
AbstractThe preparation method of Silver (Ag)-loaded cellulose paper based on the formation of seed nuclei has been proposed as a functional material with high antibacterial performance. Metal palladium (Pd) was employed for the formation of seed nuclei, followed by sodium potassium tartrate tetrahydrate reduction to create Pd–Ag-cellulose paper. The properties in term of micro morphology, distribution of silver particles, antibacterial activity and silver release behavior were investigated. The results verified the formation of Pd-nucleus on surface of fiber, and revealed that silver particles were steadily deposited on the fibers based on the seed nuclei embedded. Pd–Ag-cellulose paper, comparing with Ag-cellulose paper produced with direct deposition method, exhibited a thick closely silver layer and uniform distribution of silver particles. The antibacterial test indicated that the lethality rate of Pd–Ag-cellulose paper againstE. coliis 99.92% which is very close to that of Ag-cellulose paper (99.93%). Nevertheless, the silver release regression equation provided a high slope value (0.075) to Ag-cellulose paper, which explains a rapid release of silver. Pd–Ag-cellulose paper, by contrast, the slope value is only 0.021, and that indicates the silver slower release was achieved. Ag-loaded cellulose paper prepared using the proposed method shows the prominent properties in silver loading, antibacterial and silver slow-release.Graphical abstract