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The effect of Ag and clay nanoparticles on the antimicrobial activity of gamma-irradiated alginate/pectin beads
Journal of Nanostructure in Chemistry ( IF 8.6 ) Pub Date : 2020-06-16 , DOI: 10.1007/s40097-020-00345-x Faten Ismail Abou El Fadl , Sayeda Mohamed Ibrahim
中文翻译:
Ag和粘土纳米颗粒对γ-射线藻酸盐/果胶珠的抗菌活性的影响
更新日期:2020-06-16
Journal of Nanostructure in Chemistry ( IF 8.6 ) Pub Date : 2020-06-16 , DOI: 10.1007/s40097-020-00345-x Faten Ismail Abou El Fadl , Sayeda Mohamed Ibrahim
Abstract
In spite of the intensive work done on the preparation, characterization and applications of silver nanoparticles, the problems limit its use, still under study. One of these solutions is embedding Ag NPs in natural polymers to decrease aggregation, control its toxicity and size, and to increase its stability as well. In this respect, ionically cross-linked alginate/pectin (ALG/PEC) beads containing silver and clay nanoparticles, with different compositions were prepared. Silver nanoparticles have been obtained with hydrogel networks as nonreactors via in situ reduction of pre-adsorbed silver ions onto (ALG/PEC) beads matrix, using gamma irradiation. The effects of the composition of the two polymers, concentration of CaCl2 as a crosslinking agent on the formation of cross-linked beads were studied. Characterization of (ALG/PEC) beads, (ALG/PEC)/Ag and (ALG/PEC)/Clay-Ag nanocomposite beads were performed using scanning electron microscopy, transmission electron microscopy and X-ray diffraction (XRD). The XRD pattern obtained confirmed the presence of diffraction peaks related to Ag NPs and nanoclay. The antimicrobial activity, toward different micro-organisms of the prepared nanocomposite beads was examined. The Beads containing both Ag NPs and Nanoclay exhibited the highest antimicrobial activity for the different organisms chosen for the antimicrobial test.Graphic abstract
中文翻译:
Ag和粘土纳米颗粒对γ-射线藻酸盐/果胶珠的抗菌活性的影响