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Preparation and shape change of silver nanoparticles (AgNPs) loaded on the dialdehyde cellulose by in-situ synthesis method
Cellulose ( IF 5.7 ) Pub Date : 2022-06-29 , DOI: 10.1007/s10570-022-04692-6
Peng Du 1 , Yongjian Xu 1 , Yun Shi 1 , Qinghua Xu 2 , Shasha Li 1 , Minlan Gao 1
Affiliation  

With the improvement of medical and health care level in our society, the demand for antibacterial materials is increasing. In this work, we prepared the antibacterial materials by loading silver nanoparticles (AgNPs) on the dialdehyde cellulose (DAC) with in-situ synthesis method. DAC was prepared by pretreating cellulose fiber with sodium metaperiodate (NaIO4) to convert the hydroxyl group into aldehyde group, and then reacted with silver nitrate (AgNO3) to obtain AgNPs loaded on DAC. UV–Vis results show that the characteristic absorption peak of AgNPs at 428 nm appeared in the AgNPs-loaded-DAC. It was observed by SEM that the spherical AgNPs were distributed uniformly on the DAC surface without obvious flocculation. The color of DAC was not changed significantly, indicating that a small amount of AgNPs was loaded. In addition, sodium citrate (Na3C6H5O7) was added in the reaction of DAC and AgNO3 and its effect on the formation of AgNPs was studied. The results demonstrated that the color of DAC turned deeper and finally dark yellow with reaction time extended. When the reaction time was 60 h, the spherical AgNPs were gradually grown and transformed into triangular prism on the DAC surface. The antibacterial properties of AgNPs showed inhibition zones of 4.90 mm and 7.35 mm (60 h) against Gram-negative (E. coli) and Gram-positive (S. aureus), respectively, which increased by 40.00% and 14.85% compared with spherical AgNPs (2.5 h) obtained without Na3C6H5O7. The research of AgNPs-loaded cellulose-based materials promotes the development prospect of new nano-antibacterial materials.

Graphical abstract



中文翻译:

原位合成二醛纤维素负载银纳米粒子(AgNPs)的制备及形貌变化

随着我国社会医疗保健水平的提高,对抗菌材料的需求越来越大。在这项工作中,我们通过原位合成法将银纳米颗粒(AgNPs)负载在二醛纤维素(DAC)上制备了抗菌材料。DAC是将纤维素纤维用偏高碘酸钠(NaIO 4)预处理,将羟基转化为醛基,再与硝酸银(AgNO 3) 以获得加载在 DAC 上的 AgNP。UV-Vis 结果表明,AgNPs 在 428 nm 处的特征吸收峰出现在负载 AgNPs 的 DAC 中。SEM观察发现,球形AgNPs均匀分布在DAC表面,没有明显的絮凝。DAC的颜色没有明显变化,表明加载了少量的AgNPs。此外,在DAC与AgNO 3的反应中加入柠檬酸钠(Na 3 C 6 H 5 O 7 )并研究了其对AgNPs形成的影响。结果表明,随着反应时间的延长,DAC的颜色变深,最终呈深黄色。当反应时间为 60 h 时,球形 AgNPs 逐渐生长并在 DAC 表面转变成三棱柱。AgNPs对革兰氏阴性菌(E. coli)和革兰氏阳性菌(S. aureus)的抑菌圈分别为4.90 mm和7.35 mm(60 h),与球形相比分别增加了40.00%和14.85%。在没有 Na 3 C 6 H 5 O 7的情况下获得的 AgNPs (2.5 h). 负载AgNPs的纤维素基材料的研究促进了新型纳米抗菌材料的发展前景。

图形概要

更新日期:2022-06-29
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