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首页> 外文期刊>Advances in Environmental Technology >New Chitosan/Ag/Carbacylamidophosphate nanocomposites: Preparation and antibacterial study
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New Chitosan/Ag/Carbacylamidophosphate nanocomposites: Preparation and antibacterial study

机译：新型壳聚糖/银/羧酰胺基磷酸酯纳米复合材料的制备和抗菌研究

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Two new Chitosan-based nanocomposite films were prepared: Chitosan /7% Ag nanoparticles (NPs) (NC1) and Chitosan/7% Ag NPs/5%Carbacylamidophosphate(NC2), in which the carbacylamidophosphate derivitive is N-Nicotinyl-N′,N″- bis(hexamethylenyl) phosphorictriamide (NHE) with the formula: C5H4NC(O)NHP(O)(NC6H12)2. X-ray Powder Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive X-ray Spectroscopy (EDS) methods were used to characterize and confirm the prepared frameworkrs. XRD graph of the two nanocomposites showed all the characteristic peaks of NHE, Ag NPs, and chitosan, indicating the fact that the preparing process has not made any changes in the phases of the nanocomposites components. All the SEM micrographs and EDS analysis results also confirmed the desired structures. To study the effect of the additive NHE on the antibacterial activity of the films, in vitro antibacterial tests were done on the prepared nanocomposites against two Gram-positive (Staphylococcus aureus, Bacillus cereus) and two Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa) in Brain-Heart Infusion(BHI) medium. Results showed that the antibacterial effects of the nanocomposite containing NHE on each of the four bacteria is stronger than those for the nanocomposite without NHE.
机译：制备了两种新的基于壳聚糖的纳米复合薄膜：壳聚糖/ 7％Ag纳米颗粒（NPs）（NC1）和壳聚糖/ 7％Ag NPs / 5％Carbacylamidophosphate（NC2），其中碳酰氨基磷酸酯衍生物为N-Nicotinyl-N'，具有式：C 5 H 4 NC（O）NHP（O）（NC 6 H 12）2的N”-双（六亚甲基）磷酸三酰胺（NHE）。 X射线粉末衍射（XRD），场发射扫描电子显微镜（FE-SEM）和能量分散X射线光谱（EDS）方法用于表征和确认所制备的构图剂。两种纳米复合材料的XRD图谱均显示NHE，Ag NP和壳聚糖的所有特征峰，表明制备过程并未改变纳米复合材料组分的相。所有的SEM显微照片和EDS分析结果也证实了所需的结构。为了研究添加剂NHE对薄膜抗菌活性的影响，对制得的纳米复合材料对两种革兰氏阳性菌（金黄色葡萄球菌，蜡状芽孢杆菌）和两种革兰氏阴性菌（大肠杆菌，铜绿假单胞菌）进行了体外抗菌测试。 （BHI）培养基中）。结果表明，含有NHE的纳米复合材料对四种细菌的抗菌作用均强于不含NHE的纳米复合材料。

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