Nano silica-carbon-silver ternary hybrid induced antimicrobial composite films for food packaging application
Nano silica-carbon-silver ternary hybrid induced antimicrobial composite films for food packaging application
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DOI：
10.1016/j.fpsl.2018.12.003
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发表时间：
2019-03-01
影响因子：
8
通讯作者：
Rangari, Vijaya K.
中科院分区：
文献类型：
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作者：
Biswas, Manik C.;Tiimob, Boniface J.;Rangari, Vijaya K.
在这项工作中，Ag辅助的生物基硅碳纳米颗粒（SCAg-NPs）被加入到粘性生物聚合物溶液中，使用3D打印技术制造抗菌薄膜。以稻壳热解所得的硅碳杂化物为原料，采用一步球磨法原位制备了银纳米粒子。采用XRD和TEM对SCAg-NPs的纳米结构进行了表征。用XPS对合成颗粒进行了表征。采用XRD、FE-SEM、拉曼微分析、TGA、DSC和拉伸测试等手段对打印膜进行表征，研究纳米颗粒对薄膜热力学性能的影响。对膜进行抑菌试验，评价SCAg NPs对肠炎沙门氏菌的抑制作用。XRD、XPS和拉曼显微分析证实了Ag颗粒存在于SCNPs中，而FE-SEM对SCAg NPs的粒径测量范围在10-100 nm之间。热分析表明，SCAg纳米粒子的加入提高了纳米复合材料薄膜的热稳定性。通过拉伸试验确定SCAg NPs对聚合物膜力学性能的影响，发现SCAg NPs对聚合物膜的强度有适度的提高。
In this work, Ag assisted biobased silica-carbon nanoparticles (SCAg-NPs) were incorporated into a viscous biopolymer solution to fabricate antimicrobial thin films using 3D printing technique. The Ag NPs were prepared in situ from AgNO3 through one-step ball milling in the presence of silica-carbon hybrid obtained from pyrolysis of rice husk. The nanostructure of the SCAg-NPs was determined by XRD and TEM. These as-synthesized particles were also characterized by XPS analysis. The printed films were characterized by XRD, FE-SEM, Raman microanalysis, TGA, DSC and tensile testing to investigate the influence of nanoparticles on the thermal and mechanical properties on the films. Antimicrobial testing was carried out on the films to assess the inhibitory effect of SCAg NPs on Salmonella Enteritidis inoculum. XRD, XPS and Raman microanalysis confirmed the incorporation of Ag particles into SCNPs, while FE-SEM size measurement of the SCAg NPs ranged between 10-100 nm in diameter. Thermal analysis revealed that the inclusion of SCAg NPs led to improvement in the thermal stability of the fabricated nanocomposites films. Tensile test was carried out to determine the influence of SCAg NPs on mechanical properties of the films and found moderate increase in the strength of the polymer film.