scholarly journals One-Step Synthesis of Silver Nanoparticles Embedded Polyurethane Nano-Fiber/Net Structured Membrane as an Effective Antibacterial Medium

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1185 ◽  
Author(s):  
Bishweshwar Pant ◽  
Mira Park ◽  
Soo-Jin Park
Keyword(s):  
Silver Nanoparticles ◽  
Electrospinning Process ◽  
Wound Dressings ◽  
Ag Nps ◽  
E Coli ◽  
Antibacterial Performance ◽  
Nano Fiber ◽  
One Step ◽  
Preparation Route ◽  
Nanofiber Mats

A new and straightforward route was proposed to incorporate silver nanoparticles (Ag NPs) into the surface of polyurethane nanofibers (PU NFs). Uniform distribution of in situ formed Ag NPs on the surface of PU NFs was achieved by adding AgNO3 and tannic acid in a PU solution prior to the electrospinning process. The synthesized nanofiber mats were characterized with state-of-the-art techniques and antibacterial performances were tested against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria. The cytocompatibility and cell behavior were studied by using fibroblast cells. Following this preparation route, Ag/PU NFs can be obtained with excellent antibacterial performance, thus making them appropriate for various applications such as water filtration, wound dressings, etc.

Effective immobilization of silver nanoparticles on a regenerated cellulose–chitosan composite membrane and its antibacterial activity

2017 ◽  
Vol 41 (12) ◽  
pp. 5061-5065 ◽  
Author(s):  
Soon Wei Chook ◽  
Chin Hua Chia ◽  
Sarani Zakaria ◽  
Hui Min Neoh ◽  
Rahman Jamal
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Composite Membrane ◽  
Regenerated Cellulose ◽  
Ag Nps ◽  
E Coli ◽  
Antibacterial Performance ◽  
Cellulose Membranes ◽  
Chitosan Composite

Chitosan–cellulose membranes with high amount of Ag NPs with improved antibacterial performance against S. aureus and E. coli.

Interior vs. Exterior Incorporation of Silver Nanoparticles in Cotton Fiber and Washing Durability

2021 ◽  
Vol 8 (6) ◽  
pp. 1-12
Author(s):  
Sunghyun Nam ◽  
Sonia E. Chavez ◽  
Matthew B. Hillyer ◽  
Brian D. Condon ◽  
Hongqing Shen ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Cotton Fabric ◽  
Cotton Fiber ◽  
Detergent Solution ◽  
Ag Nps ◽  
Antibacterial Performance ◽  
The Poor ◽  
Washing Durability ◽  
Textile Products

The popular use of silver nanoparticles (Ag NPs) in commercial textile products that inhibit odor- and/or infection-causing bacteria has continuously raised concerns about their washing durability. The poor durability not only deteriorates the antibacterial performance, but also results in unwanted leaching of NPs into washing solutions. In this study, we showed how the incorporation location of Ag NPs—interior vs. exterior of cotton fiber—governs their durability against consecutive simulated home launderings. The superior washing durability of interior NPs was confirmed. The Ag losses after 50 laundering cycles for interior and exterior systems were 16% and 63% in water and 24% and 78% in detergent solution, respectively. The cotton fabric containing interior NPs predominantly released ionic Ag, whereas the fabric containing exterior NPs released particulate Ag.

scholarly journals A Surface Dielectric Barrier Discharge Plasma for Preparing Cotton-Fabric-Supported Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 961 ◽  
Author(s):  
Zhiyuan Fan ◽  
Lanbo Di ◽  
Xiuling Zhang ◽  
Hongyang Wang
Keyword(s):  
Silver Nanoparticles ◽  
Dielectric Barrier Discharge ◽  
Cotton Fabric ◽  
Barrier Discharge ◽  
Dbd Plasma ◽  
Ag Nps ◽  
Dielectric Barrier ◽  
E Coli ◽  
Plasma Method ◽  
Surface Dielectric Barrier Discharge

Cotton-fabric-supported silver nanoparticles (Ag NPs) have aroused great attention due to their remarkable physical and chemical properties and excellent broad-spectrum antibacterial performance.In this work, a surface dielectric barrier discharge (DBD) plasma method is developed and employed to prepare cotton fabric supported Ag NPs (Ag/cotton) for the first time. UV-Vis and X-ray photoelectron spectroscopy (XPS) results confirm the formation of Ag NPs. TEM images show that the size of Ag NPs is in the range 4.8–5.3 nm. Heat-sensitive cotton fabrics are not destroyed by surface DBD plasma according to FTIR and XRDresults. Wash fastness of the Ag/cotton samples is investigated using ultrasonic treatment for 30 min and it is shown that the Ag NPs possess good adhesion to the cotton fabric according to UV-Vis spectra. Antibacterial activity of the Ag/cotton samples shows that obvious bacteriostasis loops are observed around the samples with the appearance of both Gram-negative bacterium Escherichia coli (E. coli) and Gram-positive bacterium Bacillus subtilis (B. subtilis). The average diameter of the bacteriostasis loops against both E. coli and B. subtilis becomes larger with an increasing silver loading amount.This work provides a universal, fast, simple, and environmentally-friendly cold plasma method for synthesizing Ag NPs on heat-sensitive materials at atmospheric pressure.

One-step hydrothermal synthesis of silver nanoparticles loaded on N-doped carbon and application for catalytic reduction of 4-nitrophenol

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87151-87156 ◽  
Author(s):  
Yuhan Wu ◽  
Zhiqiang Wang ◽  
Shanshan Chen ◽  
Jianning Wu ◽  
Xuhong Guo ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Hydrothermal Synthesis ◽  
Catalytic Reduction ◽  
Ag Nps ◽  
One Step

In this work, we report a novel and facile one-step approach for synthesis of silver nanoparticles (Ag NPs) loaded on N-doped carbon (NC) composites.

scholarly journals Enhanced Antibacterial Performance and Cytocompatibility of Silver Nanoparticles Stabilized by Cellulose Nanocrystal Grafted with Chito-Oligosaccharides

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1339 ◽  
Author(s):  
Xiaohui Ni ◽  
Jinru Wang ◽  
Yiying Yue ◽  
Wanli Cheng ◽  
Dong Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Human Body ◽  
Average Diameter ◽  
Cell Compatibility ◽  
Hydrolysis Method ◽  
Antibacterial Performance ◽  
One Step ◽  
Thermal Stability Of ◽  
Better Than

The agglomeration of silver nanoparticles (AgNPs) results in poor antibacterial performance, and the accumulation of silver in the human body threatens human health. Preparing a matrix is a technique worth considering as it not only prevents the aggregation of AgNPs but also reduces deposition of AgNPs in the human body. In this paper, carboxy-cellulose nanocrystals (CCNC) were prepared by a simple one-step acid hydrolysis method. Chito-oligosaccharides (CSos) were grafted onto the surface of CCNC to form CSos-CCNC composite nanoparticles. CCNC and CSos-CCNC were used as stabilizers for deposing AgNPs and two types of complexes—AgNPs-CCNC and AgNPs-CSos-CCNC—were obtained, respectively. The influence of the two stabilizer matrices—CCNC and CSos-CCNC—on the morphology, thermal behavior, crystal structure, antibacterial activity, and cell compatibility of AgNPs-CCNC and AgNPs-CSos-CCNC were examined. The results showed that the AgNPs deposited on the CSos-CCNC surface had a smaller average diameter and a narrower particle size distribution compared with the ones deposited on CCNC. The thermal stability of AgNPs-CSos-CCNC was better than that of AgNPs-CCNC. AgNPs did not affect the crystalline structure of CCNC and CSos-CCNC. The antibacterial activity of AgNPs-CSos-CCNC was better than that of AgNPs-CCNC based on antibacterial studies using Escherichia coli, Staphylococcus aureus, and Klebsiella pneumoniae. The cytotoxicity of AgNPs-CSos-CCNC was remarkably lower than that of AgNPs-CCNC.

scholarly journals Enhancement of the Antibacterial Efficiency of Silver Nanoparticles against Gram-Positive and Gram-Negative Bacteria Using Blue Laser Light

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Anes Al-Sharqi ◽  
Kasing Apun ◽  
Micky Vincent ◽  
Devagi Kanakaraju ◽  
Lesley Maurice Bilung
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Exposure Time ◽  
Cell Membranes ◽  
Laser Light ◽  
Blue Laser ◽  
Resistant Bacteria ◽  
Ag Nps ◽  
Antibacterial Efficiency ◽  
E Coli

Silver nanoparticles (Ag-NPs) possess excellent antibacterial properties and are considered to be an alternative material for treating antibiotic-resistant bacteria. The present study was aimed at enhancing the antibacterial efficiency of Ag-NPs using visible laser light against Escherichia coli and Staphylococcus aureus in vitro. Four concentrations of Ag-NPs (12.5, 25, 50, and 100 μg/ml), synthesized by the chemical reduction method, were utilized to conduct the antibacterial activity of prepared Ag-NPs. The antibacterial efficiencies of photoactivated Ag-NPs against both bacteria were determined by survival assay after exposure to laser irradiation. The mechanism of interactions between Ag-NPs and the bacterial cell membranes was then evaluated via scanning electron microscopy (SEM) and reactive oxygen species analysis to study the cytotoxic action of photoactivated Ag-NPs against both bacterial species. Results showed that the laser-activated Ag-NP treatment reduced the surviving population to 14% of the control in the E. coli population, while the survival in the S. aureus population was reduced to 28% of the control upon 10 min exposure time at the concentration of 50 μg/ml. However, S. aureus showed lower sensitivity after photoactivation compared to E. coli. Moreover, the effects depended on the concentration of Ag-NPs and exposure time to laser light. SEM images of treated bacterial cells indicated that substantial morphological changes occurred in cell membranes after treatment. The results suggested that Ag-NPs in the presence of visible light exhibit strong antibacterial activity which could be used to inactivate harmful and pathogenic microorganisms.

One-step preparation of carboxymethyl cellulose/polyoxyethylene nanofiber mats containing silver nanoparticles

2016 ◽  
Vol 169 (1) ◽  
pp. 50-57 ◽  
Author(s):  
Feijun Wang ◽  
Dandan Shi ◽  
Tian Lan ◽  
Yunhua Zhang ◽  
Ziqiang Shao
Keyword(s):  
Silver Nanoparticles ◽  
Carboxymethyl Cellulose ◽  
One Step ◽  
Nanofiber Mats

scholarly journals Optimization of antimicrobial efficiency of silver nanoparticles against three oral microorganisms in irreversible hydrocolloid impressions

2021 ◽  
Author(s):  
Ahmad Jafari ◽  
Ramin Mazaheri Nezhad Fard ◽  
Sima Shahabi ◽  
Farid Abbasi ◽  
Golshid Javdani Shahedin ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Antimicrobial Agents ◽  
Diffusion Method ◽  
Ag Nps ◽  
Disk Diffusion Method ◽  
E Coli ◽  
Irreversible Hydrocolloid ◽  
Predicted Model ◽  
Water Ratio

Background and Objectives: Silver nanoparticles (Ag-NPs) are potent antimicrobial agents, which have recently been used in dentistry. The aim of the current study was to optimize antimicrobial activity of Ag-NPs used in preparing irre- versible hydrocolloid impressions against three microorganisms of Escherichia coli, Streptococcus mutans and Candida albicans. Materials and Methods: After assessing antimicrobial activity of the compound using disk diffusion method, three parame- ters of concentration of Ag-NPs (250-1000 ppm), ratio of hydrocolloid impression material powder to water (0.30-0.50) and time of mixing (20.0-60.0 s), affecting antimicrobial activity of irreversible hydrocolloid impression materials against the three microorganisms, were optimized. This combined process was successfully modeled and optimized using Box-Behnken design with response surface methodology (RSM). Decreases in colony number of E. coli, S. mutans and C. albicans were proposed as responses. Results: Qualitative antimicrobial assessments respectively showed average zone of inhibition (ZOI) of 3.7 mm for E. coli, 3.5 mm for S. mutans and 4 mm for C. albicans. For all responses, when the mixing duration and powder-to-water ratio increased, the circumstances (mixing duration of 59.38 s, powder-to-water ratio of 0.4 and Ag-NP concentration of 992 response) increased. Results showed that in optimum ppm, the proportion of decreases in colony numbers was maximum (89.03% for E. coli, 87.08% for S. mutans and 74.54% for C. albicans). Regression analysis illustrated a good fit of the ex- perimental data to the predicted model as high correlation coefficients validated that the predicted model was well fitted with data. Values of R2Adj with R2Pred were associated to the accuracy of this model in all responses. Conclusion: Disinfection efficiency dramatically increased with increasing of Ag-NP concentration, powder-to-water ratio and mixing time.

Photochemical synthesis of silver nanoparticles in H2O/Triton X-100/[Bmim]PF6 ionic liquid microemulsions and their antimicrobial activity

2020 ◽  
Vol 10 (2) ◽  
pp. 267-271
Author(s):  
Ranfeng Ye ◽  
Min Ni ◽  
Hao Chen ◽  
Shengqing Li
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Ionic Liquid ◽  
Photochemical Synthesis ◽  
Ag Nps ◽  
Environment Friendly ◽  
E Coli ◽  
Triton X ◽  
Controllable Preparation

This study presented a photoreduction route for synthesis of silver nanoparticles (Ag NPs) in ionic liquid microemulsions (ILMs). The 10 nm Ag NPs were photochemically synthesized in the H2O/Triton X-100/[Bmim]PF6 (HTB) ILMs. Above 99% Escherichia coli (E. coli) BL21 was killed in the presence of 1.56 μg/mL Ag NPs solution after incubation for 20 min, indicating that the Ag NPs prepared in HTB ILMs was applicable for the antimicrobial agent. This proposed approach for controllable preparation of Ag NPs is facile and environment-friendly, which provides great possibilities for the further functional modification of Ag NPs.

scholarly journals Boosting of Antibacterial Performance of Cellulose Based Paper Sheet via TiO2 Nanoparticles

2021 ◽  
Vol 22 (3) ◽  
pp. 1451
Author(s):  
Klaudia Maślana ◽  
Anna Żywicka ◽  
Karolina Wenelska ◽  
Ewa Mijowska
Keyword(s):  
Tio2 Nanoparticles ◽  
Low Cost ◽  
Cellulose Fibers ◽  
Living Cells ◽  
Industrial Applications ◽  
Paper Sheet ◽  
E Coli ◽  
Antibacterial Performance ◽  
Preparation Route ◽  
Escherichia Coli Bacteria

Here, we aimed to boost antibacterial performance of cellulose fibers for paper sheet application. Therefore, TiO2 nanoparticles have been used with controlled loading onto the surface of the fibers. A simple and facile composite preparation route based on ultrasound and mechanical assisted stirring has been developed. We tested cellulose paper enriched by TiO2 from 1.0 wt% to 8.0 wt%, respectively. Antibacterial performance has been studied against Staphylococcus aureus and Escherichia coli bacteria. Studies showed that all composites exhibit significant capability to reduce living cells of S. aureus and E. coli bacteria at least 60%. The simplicity, low cost, and reproducibility of the prepared method indicates the potential to be scaled up for industrial applications.

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